CN118673569B - Method for tunnel excavation route planning based on tunnel stress data - Google Patents
Method for tunnel excavation route planning based on tunnel stress data Download PDFInfo
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Abstract
A tunnel excavation route making method based on tunnel stress data relates to the technical field of tunnel construction, a geological twin model of a construction area and a plurality of tunnel simulation routes are built, contact coefficients of each tunnel simulation route and an expansive rock area are respectively obtained to obtain a tunnel excavation route, an expansive rock sample on the tunnel excavation route and expansion coefficients thereof under different environmental conditions are obtained, an expansion prediction model is built according to the corresponding relation between the environmental conditions and the expansion coefficients, historical environmental conditions of the expansive rock area are collected, an expansion coefficient change diagram of the expansive rock area under the historical environmental conditions is obtained, further a stress data change diagram of a tunnel is obtained, and supporting information of the tunnel in the expansive rock area is generated and fed back according to the stress data change diagram and the tunnel excavation route; by the technical scheme, the minimum contact surface between the tunnel excavation route and the expanded rock can be ensured, and the supporting measure of the tunnel can always bear the influence of the expanded rock area on the tunnel.
Description
Technical Field
The invention relates to the technical field of tunnel construction, in particular to a tunnel excavation route making method based on tunnel stress data.
Background
The method for making the tunnel excavation route is generally based on geological conditions, tunnel use, construction technology, economic consideration and other factors for comprehensive analysis, tunnel stress data is very important information in the tunnel excavation process, and can be used for evaluating the stability and safety of tunnel engineering, in the tunnel construction process, the influence of expanded rock is unavoidable, the expanded rock is of a rock type which can undergo volume expansion under certain conditions, and due to the existence of the expanded rock, how to support the tunnel is also a problem to be solved;
In the prior art, the treatment of the expanded rock is mostly carried out on the premise of avoiding the influence of the expanded rock as much as possible, but effective countermeasures are lacking in the case of unavoidable conditions, and in the prior art, the expansion conditions of the expanded rock in different areas are different due to different environmental conditions, and the existing technical scheme lacks a method for providing support references for the tunnel in construction aiming at the expansion conditions of the expanded rock, so that the set support measures often lack pertinence, and the tunnel excavation route establishment method based on tunnel stress data is provided aiming at the defects of the prior art.
Disclosure of Invention
The invention aims to provide a tunnel excavation route establishment method based on tunnel stress data.
The aim of the invention can be achieved by the following technical scheme: the tunnel excavation route making method based on the tunnel stress data comprises the following steps:
Step S1: collecting geological data of a construction area, constructing a geological twin model of the construction area according to the collected geological data, and carrying out visual processing on an expanded rock area in the constructed geological twin model;
Step S2: obtaining tunnel information according to a construction scheme, constructing a tunnel twin model according to the obtained tunnel information, constructing a plurality of tunnel simulation routes by combining the geological twin model, respectively obtaining the contact coefficients of each tunnel simulation route and an expansive rock area, and obtaining a tunnel excavation route according to the obtained contact coefficients;
Step S3: obtaining an expansion rock sample on a tunnel excavation route, monitoring expansion coefficients of the expansion rock sample under different environmental conditions, and constructing an expansion prediction model of an expansion rock region according to the obtained corresponding relation between the environmental conditions and the expansion coefficients;
Step S4: acquiring historical environmental conditions of an expanded rock area, acquiring an expansion coefficient change diagram of the expanded rock area under the historical environmental conditions according to an expansion prediction model, acquiring stress data of a tunnel twin model under different expansion coefficients, acquiring a stress data change diagram of a tunnel by combining the expansion coefficient change diagram, generating supporting information of the tunnel in the expanded rock area according to the stress data change diagram and a tunnel cutting line, and feeding back the supporting information.
Further, the geological data of the construction area is collected, a geological twin model of the construction area is constructed according to the collected geological data, and the process of carrying out visualization processing on the expanded rock area in the constructed geological twin model comprises the following steps:
And acquiring geological data of the construction area, wherein the geological data refer to various information necessary for constructing a digital twin model of the construction area, constructing the geological twin model of the construction area according to the geological data by utilizing a digital twin technology, acquiring an expanded rock area of the construction area according to the acquired geological data, and rendering the acquired expanded rock area into a color different from other areas.
Further, obtaining tunnel information according to a construction scheme, constructing a tunnel twinning model according to the obtained tunnel information, and constructing a plurality of tunnel simulation routes by combining the geological twinning model, wherein the process comprises the following steps:
The method comprises the steps of obtaining a construction scheme of a tunnel, obtaining tunnel information according to the construction scheme, wherein the tunnel information refers to all information necessary for constructing a digital twin model of the tunnel, constructing a tunnel twin model of the tunnel according to the tunnel information by utilizing a digital twin technology, combining the constructed tunnel twin model with a geological twin model, constructing a plurality of tunnel simulation routes in the geological twin model by utilizing an exhaustion method, and respectively setting the tunnel twin model in the constructed tunnel simulation routes.
Further, the process of obtaining the tunnel excavation route according to the obtained contact coefficients includes:
And respectively obtaining the total contact area of each tunnel simulation route and all geological environments and the contact expansion rock area of the expansion rock area, dividing the contact expansion rock area by the total contact area to obtain the contact coefficient of each tunnel simulation route, and taking the tunnel simulation route with the minimum contact coefficient as the tunnel excavation route.
Further, the process of obtaining an expanded rock sample on a tunnel excavation route, monitoring expansion coefficients of the expanded rock sample under different environmental conditions, and constructing an expansion prediction model of an expanded rock region according to the obtained correspondence between the environmental conditions and the expansion coefficients includes:
Collecting an expanded rock sample in an expanded rock region on a tunnel excavation route, wherein the environmental conditions are various external conditions capable of enabling the expanded rock sample to be expanded, acquiring a collection volume of the expanded rock sample, applying different environmental conditions to the expanded rock sample, acquiring a corresponding expansion volume, and dividing the expansion volume by the ratio of the collection volume to the expansion volume to be used as an expansion coefficient of the expanded rock sample;
And incorporating different environmental conditions and expansion coefficients corresponding to the environmental conditions into the same data set, selecting a deep learning model as an initial expansion prediction model, and training and evaluating the initial expansion prediction model by using the data set to obtain a current expansion prediction model.
Further, the process of acquiring the historical environmental condition of the expanded rock area and obtaining the expansion coefficient change map of the expanded rock area under the historical environmental condition according to the expansion prediction model comprises the following steps:
And acquiring historical environmental conditions of the expanded rock area and constructing an environmental condition change graph, wherein the historical environmental conditions are annual environmental conditions of the expanded rock area, and the expansion coefficients of the expanded rock area under different historical environmental conditions are obtained according to an expansion prediction model to construct the expansion coefficient change graph.
Further, the process of obtaining the stress data change map of the tunnel by combining the expansion coefficient change map comprises the following steps:
And acquiring stress data on the contact surface of the tunnel excavation route and the expanded rock area, simultaneously obtaining corresponding environmental conditions and expansion coefficients, inputting the stress data and the expansion coefficients into a geological twin model containing the tunnel excavation route, and adjusting the expansion coefficients in the geological twin model according to the expansion coefficient change diagram to obtain corresponding stress data, so as to construct a stress data change diagram.
Further, the process of generating and feeding back the supporting information of the tunnel in the expanded rock area according to the stress data change graph and the tunnel excavation route comprises the following steps:
And adding supporting measures on the contact surface of the tunnel cutting line and the expansion rock area, taking the highest value in the stress data change graph as a stress peak value born by the tunnel cutting line in the expansion rock area, setting the bearing capacity of the supporting measures according to the stress peak value, generating supporting information of the tunnel, wherein the supporting information comprises the contact surface of the tunnel cutting line and the expansion rock area and the bearing capacity of the supporting measures, and feeding back the supporting information to related personnel.
Compared with the prior art, the invention has the beneficial effects that:
1. According to the invention, geological data of a construction area and tunnel information of a tunnel are collected, so that a geological twin model and a tunnel twin model are respectively constructed, a digital twin technology can be introduced into the technical field of tunnel construction, an intuitive and visual method is provided for tunnel construction which is not easy to observe, a tunnel simulation route is constructed in a virtual space in advance by combining the geological twin model and the tunnel twin model, a tunnel simulation route with minimum contact is obtained according to the contact coefficients of each simulation route and an expanded rock area, the minimum contact surface between the obtained tunnel excavation route and the expanded rock can be ensured, and the influence of the expanded rock on the tunnel can be fundamentally reduced;
2. According to the invention, the expansion rock samples on the tunnel excavation route are collected, so that the expansion coefficients of the tunnel excavation route are obtained under different environmental conditions, an expansion prediction model of an expansion rock area is constructed according to the corresponding relation between the environmental conditions and the expansion coefficients, the daily expansion coefficient change condition of the expansion rock area can be obtained by combining comprehensive historical environmental conditions, meanwhile, the stress data received by the tunnel is simulated in the digital twin model, the daily change condition of the tunnel stress data can be obtained, supporting measures are added to the contact surface of the tunnel and the expansion rock area based on the daily change condition, and the effect of the tunnel supporting measures on the tunnel can be ensured to be always borne.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
As shown in fig. 1, the tunnel excavation route formulation method based on tunnel stress data includes the steps of:
Step S1: collecting geological data of a construction area, constructing a geological twin model of the construction area according to the collected geological data, and carrying out visual processing on an expanded rock area in the constructed geological twin model;
Step S2: obtaining tunnel information according to a construction scheme, constructing a tunnel twin model according to the obtained tunnel information, constructing a plurality of tunnel simulation routes by combining the geological twin model, respectively obtaining the contact coefficients of each tunnel simulation route and an expansive rock area, and obtaining a tunnel excavation route according to the obtained contact coefficients;
Step S3: obtaining an expansion rock sample on a tunnel excavation route, monitoring expansion coefficients of the expansion rock sample under different environmental conditions, and constructing an expansion prediction model of an expansion rock region according to the obtained corresponding relation between the environmental conditions and the expansion coefficients;
Step S4: acquiring historical environmental conditions of an expanded rock area, acquiring an expansion coefficient change diagram of the expanded rock area under the historical environmental conditions according to an expansion prediction model, acquiring stress data of a tunnel twin model under different expansion coefficients, acquiring a stress data change diagram of a tunnel by combining the expansion coefficient change diagram, generating supporting information of the tunnel in the expanded rock area according to the stress data change diagram and a tunnel cutting line, and feeding back the supporting information.
It should be further noted that, in the specific implementation process, geological data of the construction area are collected, a geological twin model of the construction area is constructed according to the collected geological data, and the process of performing visualization processing on the expanded rock area in the constructed geological twin model includes:
Collecting geological data of a construction area of a tunnel, wherein the geological data comprise, but are not limited to, topographic information, stratum information, rock engineering information, underground hydrological information, mineral resource information and the like of the construction area, namely all information necessary for constructing a digital twin model of the construction area;
And constructing a digital twin model of the construction area according to the acquired geological data by utilizing a digital twin technology, and marking the digital twin model as a geological twin model, wherein the geological twin model is used for simulating the geological condition of the construction area in a virtual space, and acquiring an expanded rock area of the construction area according to the acquired geological data, wherein the expanded rock is a rock type which can undergo volume expansion under a certain condition, and the acquired expanded rock area is subjected to visualization processing, wherein the visualization processing is used for distinguishing the obtained expanded rock area from other areas, namely rendering the obtained expanded rock area into colors different from the other areas so as to facilitate related personnel to view information such as geographic position, coverage area, actual volume and the like of the obtained expanded rock area.
It should be further described that, in the specific implementation process, tunnel information is obtained according to a construction scheme, a tunnel twinning model is constructed according to the obtained tunnel information, and a process of constructing a plurality of tunnel simulation routes by combining with a geological twinning model includes:
Obtaining a construction scheme of a tunnel, and obtaining tunnel information of the tunnel according to the obtained construction scheme, wherein the tunnel information is used for representing various design standards of the tunnel in the construction process, including but not limited to materials, cross-sectional shapes, sizes, supporting structures, drainage systems and the like, namely various information necessary for constructing a digital twin model of the tunnel;
And constructing a digital twin model of the tunnel according to the obtained tunnel information by utilizing a digital twin technology, marking the digital twin model as a tunnel twin model, wherein the tunnel twin model is used for simulating the physical form of the tunnel, combining the constructed tunnel twin model with a geological twin model, constructing a plurality of tunnel simulation routes in the geological twin model by utilizing an exhaustion method, and respectively setting the tunnel twin model in the constructed tunnel simulation routes, wherein the tunnel simulation routes are used for providing references for related personnel when formulating the tunnel routes.
It should be further noted that, in the implementation process, the process of obtaining the contact coefficient between each tunnel simulation route and the expanded rock area and obtaining the tunnel excavation route according to the obtained contact coefficient includes:
Taking any tunnel simulation route as an example, in the constructed geological twin model, the tunnel simulation route passes through the tunnel simulation route, and in the embodiment of the invention, the most suitable tunnel simulation route is obtained according to the contact condition of the tunnel simulation route and an expanded rock area, so that the tunnel simulation route is considered as necessarily having the contact condition with the expanded rock area;
The method comprises the steps of obtaining the total area of the contact condition of the outer surface of a tunnel simulation route and all geological environments, recording the total contact area, obtaining the contact condition of the outer surface of the tunnel simulation route and an expanded rock area, recording the contact expanded rock area, dividing the contact expanded rock area by the total contact area to obtain the contact coefficient of the tunnel simulation route, wherein the contact coefficient is used for reflecting the proportion of the contact expanded rock area of the tunnel simulation route to the contact area of the tunnel simulation route to all geological environments, obtaining the contact coefficient of each tunnel simulation route by adopting the same method, taking the tunnel simulation route with the minimum contact coefficient as the tunnel excavation route of the construction scheme, and constructing in the construction area according to the geographic position corresponding to the tunnel simulation route.
It should be further noted that, in the implementation process, the process of obtaining the expansion rock sample on the tunnel excavation route, monitoring the expansion coefficients of the expansion rock sample under different environmental conditions, and constructing the expansion prediction model of the expansion rock region according to the obtained correspondence between the environmental conditions and the expansion coefficients includes:
The method comprises the steps of collecting the obtained expanded rock in an expanded rock area on a tunnel excavation route, and recording the obtained expanded rock as an expanded rock sample, wherein the expanded rock can undergo volume expansion under certain environmental conditions, so that the expanded rock with certain volume can be treated by adopting a control variable method, the volume change condition of the expanded rock can be obtained, and the expansion condition of the expanded rock in the expanded rock area along with the change of the environmental conditions can be reflected;
The environmental conditions are used for describing various external conditions of the expanded rock in a construction area, including temperature, humidity, pH value, pressure, vibration frequency and the like, namely all external conditions capable of enabling the expanded rock to be expanded, recording the initial volume of an acquired expanded rock sample, recording the initial volume as an acquired volume, applying different environmental conditions to the expanded rock sample under the condition of not changing other factors, recording the volumes of the expanded rock sample under different environmental conditions, namely the expanded volume, and dividing the expanded volume by the acquired volume to obtain the ratio as the expansion coefficient of the expanded rock sample;
The method comprises the steps of incorporating different environmental conditions and expansion coefficients corresponding to the environmental conditions into the same data set, dividing the data set into a training set and a test set, selecting a deep learning model as an initial expansion prediction model, training the initial expansion prediction model by using the training set, obtaining a trained expansion prediction model by learning the corresponding relation between the environmental conditions and the expansion coefficients, evaluating the trained expansion prediction model by using the test set, optimizing the trained expansion prediction model according to an evaluation result to obtain an optimized expansion prediction model, and taking the latest optimized expansion prediction model as the latest expansion prediction model, wherein the expansion prediction model is used for outputting the expansion coefficients of the expansion rock under the environmental conditions according to the input environmental conditions.
It should be further noted that, in the implementation process, the process of acquiring the historical environmental condition of the expanded rock area and obtaining the expansion coefficient change map of the expanded rock area under the historical environmental condition according to the expansion prediction model includes:
The method comprises the steps of collecting historical environmental conditions of an expansive rock area, wherein the historical environmental conditions are used for representing annual environmental conditions and time-varying changing conditions of the expansive rock area, constructing an environmental condition change graph with an abscissa as a time point and an ordinate as the environmental conditions according to the obtained historical environmental conditions, obtaining expansion coefficients of the expansive rock area under different historical environmental conditions according to a constructed expansion prediction model, constructing an expansion coefficient change graph with a corresponding abscissa as the time point and an ordinate as the expansion coefficients, and reflecting the expansion coefficients of the expansive rock area at different times of the year.
It should be further described that, in the implementation process, the process of obtaining the stress data change map of the tunnel by combining the expansion coefficient change map includes:
And acquiring stress data on the contact surface of the tunnel excavation route and the expansion rock area, simultaneously acquiring the environmental condition and the corresponding expansion coefficient, inputting the acquired stress data and expansion coefficient into a geological twinning model comprising the tunnel excavation route, adjusting the expansion coefficient of the expansion rock area in the geological twinning model to acquire the corresponding stress data under different expansion coefficients, adjusting the expansion coefficient in the geological twinning model according to the expansion coefficient change diagram in combination with the expansion coefficient change diagram to acquire the corresponding stress data, and constructing a stress data change diagram with the abscissa as a time point and the ordinate as the stress data according to the acquired stress data.
It should be further noted that, in the implementation process, the process of generating and feeding back the supporting information of the tunnel in the expanded rock area according to the stress data change chart and the tunnel excavation route includes:
the method comprises the steps that a contact surface between a tunnel excavation route and an expanded rock area is obtained, and as the expanded rock changes along with the change of the environment, the contact surface still can work normally when the expanded rock changes, and support measures are needed to be added to the contact surface in the construction process;
And obtaining the highest value of the stress peak value, namely the highest value in the stress data change diagram, of the tunnel cutting line in the expanded rock area according to the constructed stress data change diagram, and obtaining the bearing capacity of the supporting measure according to the obtained stress peak value, wherein the bearing capacity which can be provided by the supporting measure is required to be larger than a plurality of times of the stress peak value, and generating supporting information of the tunnel on the basis of the bearing capacity, wherein the supporting information comprises the contact surface of the tunnel cutting line and the expanded rock area and the bearing capacity which needs to be provided by the supporting measure, and feeding back the generated supporting information to related personnel to provide reference.
The above embodiments are only for illustrating the technical method of the present invention and not for limiting the same, and it should be understood by those skilled in the art that the technical method of the present invention may be modified or substituted without departing from the spirit and scope of the technical method of the present invention.
Claims (7)
1. The tunnel excavation route making method based on the tunnel stress data is characterized by comprising the following steps of:
Step S1: collecting geological data of a construction area, constructing a geological twin model of the construction area according to the collected geological data, and carrying out visual processing on an expanded rock area in the constructed geological twin model;
Step S2: obtaining tunnel information according to a construction scheme, constructing a tunnel twin model according to the obtained tunnel information, constructing a plurality of tunnel simulation routes by combining the geological twin model, respectively obtaining the contact coefficients of each tunnel simulation route and an expansive rock area, and obtaining a tunnel excavation route according to the obtained contact coefficients;
Step S3: obtaining an expansion rock sample on a tunnel excavation route, monitoring expansion coefficients of the expansion rock sample under different environmental conditions, and constructing an expansion prediction model of an expansion rock region according to the obtained corresponding relation between the environmental conditions and the expansion coefficients;
step S4: acquiring historical environmental conditions of an expanded rock area, acquiring an expansion coefficient change diagram of the expanded rock area under the historical environmental conditions according to an expansion prediction model, acquiring stress data of a tunnel twin model under different expansion coefficients, acquiring a stress data change diagram of a tunnel by combining the expansion coefficient change diagram, generating supporting information of the tunnel in the expanded rock area according to the stress data change diagram and a tunnel excavation route, and feeding back the supporting information;
the process for obtaining the tunnel excavation route according to the obtained contact coefficients comprises the following steps:
And respectively obtaining the total contact area of each tunnel simulation route and all geological environments and the contact expansion rock area of the expansion rock area, dividing the contact expansion rock area by the total contact area to obtain the contact coefficient of each tunnel simulation route, and taking the tunnel simulation route with the minimum contact coefficient as the tunnel excavation route.
2. The tunnel excavation route formulation method based on tunnel stress data of claim 1, wherein geological data of the construction area is collected, a geological twin model of the construction area is constructed according to the collected geological data, and the process of visualizing the expanded rock area in the constructed geological twin model comprises:
The geological data of the construction area are collected, a geological twin model of the construction area is constructed according to the geological data by utilizing a digital twin technology, an expanded rock area of the construction area is obtained according to the collected geological data, and the obtained expanded rock area is rendered into a color different from other areas.
3. The tunnel excavation route formulation method based on tunnel stress data according to claim 2, wherein the process of obtaining tunnel information according to a construction scheme, constructing a tunnel twinning model according to the obtained tunnel information, and constructing a plurality of tunnel simulation routes in combination with a geological twinning model comprises:
The method comprises the steps of obtaining a construction scheme of a tunnel, obtaining tunnel information according to the construction scheme, wherein the tunnel information refers to all information necessary for constructing a digital twin model of the tunnel, constructing a tunnel twin model of the tunnel according to the tunnel information by utilizing a digital twin technology, combining the constructed tunnel twin model with a geological twin model, constructing a plurality of tunnel simulation routes in the geological twin model by utilizing an exhaustion method, and respectively setting the tunnel twin model in the constructed tunnel simulation routes.
4. A tunnel excavation route formulation method based on tunnel stress data as claimed in claim 3, wherein the process of obtaining an expanded rock sample on a tunnel excavation route, monitoring expansion coefficients of the expanded rock sample under different environmental conditions, and constructing an expansion prediction model of an expanded rock region according to the obtained correspondence between the environmental conditions and the expansion coefficients comprises:
Collecting an expanded rock sample in an expanded rock region on a tunnel excavation route, wherein the environmental conditions are various external conditions capable of enabling the expanded rock sample to be expanded, acquiring a collection volume of the expanded rock sample, applying different environmental conditions to the expanded rock sample, acquiring a corresponding expansion volume, and dividing the expansion volume by the ratio of the collection volume to the expansion volume to be used as an expansion coefficient of the expanded rock sample;
And incorporating different environmental conditions and expansion coefficients corresponding to the environmental conditions into the same data set, selecting a deep learning model as an initial expansion prediction model, and training and evaluating the initial expansion prediction model by using the data set to obtain a current expansion prediction model.
5. The tunnel excavation route formulation method based on tunnel stress data of claim 4, wherein the process of acquiring the historical environmental conditions of the expanded rock region and obtaining the expansion coefficient variation map of the expanded rock region under the historical environmental conditions according to the expansion prediction model comprises:
And acquiring historical environmental conditions of the expanded rock area, constructing an environmental condition change graph, and obtaining expansion coefficients of the expanded rock area under different historical environmental conditions according to an expansion prediction model to construct the expansion coefficient change graph.
6. The method for creating a tunnel excavation route based on tunnel stress data as claimed in claim 5, wherein the process of obtaining stress data of the tunnel twin model under different expansion coefficients and combining the expansion coefficient change map to obtain the stress data change map of the tunnel comprises:
And acquiring stress data on the contact surface of the tunnel excavation route and the expanded rock area, simultaneously obtaining corresponding environmental conditions and expansion coefficients, inputting the stress data and the expansion coefficients into a geological twin model containing the tunnel excavation route, and adjusting the expansion coefficients in the geological twin model according to the expansion coefficient change diagram to obtain corresponding stress data, so as to construct a stress data change diagram.
7. The method for creating a tunnel excavation route based on tunnel stress data as claimed in claim 6, wherein the process of generating and feeding back supporting information of the tunnel in the expanded rock area based on the stress data change map and the tunnel excavation route comprises:
And adding supporting measures on the contact surface of the tunnel cutting line and the expansion rock area, taking the highest value in the stress data change graph as a stress peak value born by the tunnel cutting line in the expansion rock area, setting the bearing capacity of the supporting measures according to the stress peak value, generating supporting information of the tunnel, wherein the supporting information comprises the contact surface of the tunnel cutting line and the expansion rock area and the bearing capacity of the supporting measures, and feeding back the supporting information to related personnel.
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| CN117386379A (en) * | 2023-11-03 | 2024-01-12 | 中国铁建大桥工程局集团有限公司 | Construction method of weak expansion mudstone large cross-section tunnel |
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| CN105401954A (en) * | 2015-10-23 | 2016-03-16 | 中电建路桥集团有限公司 | Tunnel anti-expansion support design method |
| CN107503762A (en) * | 2017-10-11 | 2017-12-22 | 重庆大学 | A kind of design method of Swelling Rock tunnel floor |
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