Summary of the invention
To solve the above problems, the invention proposes a kind of construction design method of waste and old explosive explosion apparatus for destroying,
The shock wave that explosive generation can be effectively absorbed and cut down while security protection, controls the damage effect of fragmentation, prevents quick-fried
Piece of scraping flies out, and extends the service life of facility.
Technical scheme is as follows:
The safety protecting method destroyed for the explosion of waste and old explosive, which is characterized in that be placed in waste and old explosive specific
Explosion apparatus for destroying in, the specific explosion apparatus for destroying includes the main structure being arranged on foundation structure, main body knot
Structure and foundation structure are all made of armored concrete and are made, and sandy soil protection is provided on the foundation structure inside the main structure
Layer, the inner wall of main structure are provided with inner lining structure.
In the above-mentioned safety protecting method destroyed for the explosion of waste and old explosive, main structure parameter is according to formulaIt designs, wherein the safe distance based on r between structure wall and explosive Ah、Eh、fcd、ρhBe respectively reinforced concrete earth concrete whole longitudinal cross-sections product,
Coefficient of elasticity, axial compressive strength design value, density;As、Es、f'sd、ρsIt is reinforcing bar whole longitudinal cross-section product, elasticity system respectively
Number, longitudinal reinforcement compression strength value, density;For structure axle center Compression Stability coefficient;C is charging quality;B is explosive phase relation
Number, the B=250 for TNT;ρ is the density of structural material, and σ is the strength of structural materials limit, and h is structural thickness.
It is above-mentioned for waste and old explosive explosion destroy safety protecting method in, sandy soil protect layer parameter according toIt designs, wherein KαFor the compressed coefficient of dielectric material, C is charging quality, rαIt is quick-fried for sandy soil protective layer and explosive
The minimum range of the heart.
In the above-mentioned safety protecting method destroyed for the explosion of waste and old explosive, sandy soil protective layer is two-layered medium, ginseng
Number according toDesign, wherein e is the quick-fried heart of explosive away from ground level, h1、Kz1Respectively first layer dielectric thickness
With shock collapse coefficient;h2、Kz2Second layer dielectric thickness, shock collapse coefficient respectively.
In the above-mentioned safety protecting method destroyed for the explosion of waste and old explosive, inner lining structure is steel plate, inner lining structure
Thickness formed after being exploded according to waste and old explosive the fragment of size distribution maximum probability the Penetration Depth of inner lining structure is calculated and
?;Wherein Penetration Speed of the fragment to inner lining structureFor the initial velocity of fragmentation
Degree, β are the ratio of explosive payload C and metal shell mass M, and D is explosion velocity of explosive, mfIt is front face area, C for fragmentation quality, SDFor gas
Dynamic resistance coefficient, ρ are atmospheric density, and x is position of the fragmentation apart from the quick-fried heart.
It is above-mentioned for waste and old explosive explosion destroy safety protecting method in, taken in calculating fragment scale be long 10mm,
Fragment is calculated to the Penetration Depth of inner lining structure using the method for finite element in wide 10mm, high 10mm.
In the above-mentioned safety protecting method destroyed for the explosion of waste and old explosive, inner lining structure is detachable and interchangeable 12mm
Thick steel plate.
In the above-mentioned safety protecting method destroyed for the explosion of waste and old explosive, main structure includes the crown wall of spherical cap structure
With the side wall of cylindrical surface structure, it is provided with several disengaging entrances on side wall, is provided with outer protection at the position of face disengaging entrance
Wall.
Several gas vents are provided on crown wall in the above-mentioned safety protecting method destroyed for the explosion of waste and old explosive.
In the above-mentioned safety protecting method destroyed for the explosion of waste and old explosive, the axis direction of gas vent and gas vent with
The inclined angle in line direction of the crown wall center of curvature.
The beneficial effects of the present invention are:
(1) major parameter of Destruction Establishment has been calculated in the present invention according to the explosive equivalent for destroying explosive device first,
And thus devise the structure of Destruction Establishment;The direct impact failure of ground has been determined then according to explosion and has been protected using sandy soil
The scheme that layer is protected, and the thickness of sandy soil protective layer and its position apart from the quick-fried heart has been determined, finally according to detonation
The characteristics of middle air-shock wave, the inner lining structure of facility is devised, to realize the security protection in explosion Destruction.
(2) Design of Main Structure of the present invention is two parts, and crown wall is the reinforced concrete canopy of curved surface, it is ensured that
The load of even receiving, sidewall structure are designed as cylindrical surface, support superstructure that can be stable, and carry what entire facility was subject to
Effect.
(3) inner liner portion is loaded on main structure inner wall, can protect inner wall and is not damaged, it is ensured that entire facility is carried,
And liner can be replaced in time, it is ensured that the service life of facility.
(4) sandy soil protective layer is arranged in foundation structure upper layer, has certain gap between sandy soil particle, can be absorbed certain
Shock wave energy, while increasing explosion center at a distance from reinforced concrete structure, it can guarantee the structure peace of concrete foundation
Entirely.
(5) direction of gas vent of the invention and the direction of explosion product are at a certain angle, so when explosion product pushes away
When body of taking offence moves to gas vent, gas is removed since its fluid behaviour can be turned to by row of exhausting-gas hole, and slungshot can touch in hole
It is rebounded back in facility on wall, prevents fragmentation from flying out and damage.
Specific embodiment
1, facility structure is designed according to explosion wave and parameter is chosen:
When powder charge explosion time in air, due to the immense pressure of explosion product, explosion product expands rapidly outward.Expansion
Explosion product as it is same accelerate promote piston equally compress around air.Since explosion product is initially with high
Speed compression around air dielectric, increase its pressure, density and thermal shock, form the very high initial impact of pressure
Wave (about 108The order of magnitude of pa).With the continuous expansion of explosion product, just have inwardly propagated along explosion product it is sparse
Wave.When sparse wave surface travels to the quick-fried heart, the pressure at the quick-fried heart is just begun to decline.
For different distance, the effect that target is born is also different.In the distance nearest apart from the quick-fried heart, target is born
Mainly explosion product effect: when powder charge and target distance are less than (10~20) r0, wherein r0 is powder charge half
Diameter, collective effect of the target by explosion product and shock wave;And when farther apart, the target only destruction by air-shock wave
Effect.
It is well known that explosion time, shock wave and explosion product can gradually be expanded outward in the form of spherical surface in the sky for powder charge
It propagates, so the building of ball-type can uniformly carry the effect of explosion wave, but if entire facilities design is at hemisphere
Shape, moment of flexure that entire facility is subject to is analyzed from the mechanics of materials can be very big, and stability is difficult to ensure.So by facility floor
Part is designed as two piecemeals, and top is the reinforced concrete canopy of curved surface, it is ensured that uniformly bears load.Substructure is set
It is calculated as cylinder, support superstructure that can be stable, and carry the effect that entire facility is subject to.
Destruction of the various targets under shock is an extremely complex problem, it not only with the medicine of powder charge
It is related to measure size C, the shape of powder charge;Also depend on relative position, the distance r of powder charge and target;And with the shape of target, knot
Structure, the physical and mechanical property factor of material are related.For explosive payload C TNT explosive charge to thickness h, density p, elastic modulus E
With the Calculation of Safety Distance formula for the armored concrete that strength degree is σ are as follows:
The whole longitudinal cross-sections product for the reinforced concrete earth concrete taken is Ah, coefficient of elasticity Eh, axial compressive strength sets
Evaluation fcd, density ph;H is structural thickness;Reinforcing bar whole longitudinal cross-section product is As, coefficient of elasticity Es, longitudinal reinforcement compression strength value
f'sd, density ps;Structure axle center Compression Stability coefficientReinforcing bar proportionThe then material of entire armored concrete
Elastic modulus E, the calculation formula of strength degree σ and density p it is as follows:
Material parameter list data is consulted, can be calculated according to formula and destroy 20kgTNT when the Waste Distillers'Grain of dose is protected
Demonstrate,prove the material parameter (to ensure safe premise, parameter selection is expanded as far as possible) when facility internal diameter is less than 5m.
Shown in referring to Figures 1 and 2, waste and old explosive explosion apparatus for destroying of the invention includes being arranged on foundation structure 5
Main structure 1 and outer protecting wall 3, the crown wall 11 of main structure 1 including curved-surface structure and the side wall 12 of cylindrical surface structure, wherein
Crown wall 11 uses spherical cap structure most preferably, to be provided with several disengaging entrances 4 on side wall 12, and outer protecting wall 3 is arranged in main body knot
At the position of the external face disengaging entrance 4 of structure 1.To guarantee that explosion wave will not damage effect, facility master to facility
The internal diameter of body substructure has to be larger than 5m, and wall material is thickness 80cmC80 intensity rank armored concrete proportion 3%
HRB400 or RRB400 (KL400) reinforcing bar, upper reinforcement coagulation earth mulch with a thickness of 50cm, material is same as described above, and is pushing up
Several gas vents 2 are provided on wall 11, for carrying out the unloading of explosion product.
Portion body structure 1 on facility floor is designed as two piecemeals, and crown wall 11 is the reinforced concrete canopy of curved surface,
It can guarantee uniformly to bear load.12 structure of side wall is designed as cylinder, support superstructure that can be stable, and carries whole
The effect that a facility is subject to.Disengaging entrance 4 is arranged on the side wall 12 of main structure 1, and outer protecting wall 3 is arranged in main structure 1
Outside, outer protecting wall 3 with disengaging entrance 4 be correspondingly arranged, sandy soil protective layer 6 be arranged on 5 upper layer of foundation structure.
Explosion product can push the gas of surrounding to move around with high speed, if it is closed facility, directly receiving institute
The destruction that some load actions are subject to can be very strong, so must have the effect that gas vent weakens explosion product.Traditional exhaust
Hole is consistent with the direction that flies out of explosion product, and gas vent can allow explosion product along hole to discharge, but explodes the fragmentation generated
It can all fly out from gas vent with slungshot, be runed counter to the principle of safe design.
As shown in Figure 3 and Figure 4, gas vent 2 is provided in the present invention on crown wall 11, gas vent 2 is biased to setting, gas vent 2
Direction and explosion product direction it is at a certain angle, that is to say, that the axis direction of gas vent 2 and gas vent 2 and crown wall 11
The inclined angle in line direction of the center of curvature.When explosion product pushes gas motion to gas vent 2, gas is due to its fluid
Characteristic can turn to, and exclude by gas vent 2, and slungshot can be touched on hole wall and be rebounded back in facility, prevented fragmentation from flying out and caused
It destroys.And conventional exhaust pore structure then be easy to cause explosive fragment to fly out device in Fig. 3, causes security risk.Gas vent
It is 40cm~60cm, specific size and the distance dependent apart from the quick-fried heart having a size of radius, to guarantee fragmentation from the quick-fried heart with any side
It can all be blocked to projecting by top cover.
In order to normally enter and exit evolutionary operation inside facility, according to the equipment facility and destroyed article size carried,
The doorframe of design is the arched door of high 2.5m wide 2m, while in order to unload the explosion wave for being transmitted to substructure, opening 4
Doorframe.The outer protecting wall of design simultaneously, prevents the fragmentation to fly out from doorframe from externally causing to damage.The high 4m of outer protecting wall of design,
For wide 5m with a thickness of the armored concrete of 50cm, material is identical as main structure.The inner wall of outer protecting wall is apart from the outer of main structure
Wall 1.5m.
2, protection explosion carries out structure snd size design to the direct impact failure of ground
As depicted in figs. 1 and 2, foundation structure 5 uses large volume design to guarantee the stability of carrying, while can guarantee ground
Seismic wave is relatively uniform to the load action of concrete foundation.Since blast impulse is very strong to directly acting on for underground structure,
The shock wave energy that explosion center initially generates reaches 1010Pa rank, therefore common material can not directly bear the straight of blast impulse
Connect effect.The present invention is provided with sandy soil protective layer 6 on the foundation structure 5 inside main structure 1, centered on sandy soil protective layer 6
The relatively thin pie structure in thicker periphery.There is certain gap between sandy soil particle, certain shock wave energy can be absorbed, simultaneously
Increase explosion center at a distance from reinforced concrete structure, can guarantee the structure safety of concrete foundation.Sandy soil protective layer
Thickness can guarantee that foundation structure will not be directly destroyed, and explosive explodes in solid dielectric, and explosion product directly acts on meeting
To explosion cavity radius r aroundαThe medium in region is directly destroyed.For the compressed coefficient K of different mediumαWith the compression of explosive payload C
Radius calculation formula are as follows:
It is not less than 66cm away from the smallest distance of the quick-fried heart according to selected sandy soil design thickness.The thickness of reinforced concrete structure
Be guarantee entire facility in explosion stability inferior,
Shock collapse radius rzThat is the critical thickness values of inner surface of component not shock collapse are K for shock collapse coefficientzSingle-layer medium material
Material, shock collapse radius are as follows:
For first layer dielectric thickness h1, shock collapse COEFFICIENT Kz1;Second layer dielectric thickness h2, shock collapse COEFFICIENT Kz2;The quick-fried heart of explosive
The double-layer structure for being e away from ground level, shock collapse radius are
First layer thickness selects the explosion cavity radius of medium, and design second layer minimum thickness is not less than 54cm.
3, for the structure and design of material of slungshot failure mechanism of exploding
In blast process, explosion fragment is in the case where charging explosion generates detonation product effect, and case swells, fracture are broken
It forms.The size of fragmentation is uneven, and shape is regular, and speed per hour degree is decayed quickly in air.Slungshot, fragmentation are produced in detonation
It disperses around in air under the action of object, hits the inner wall of Destruction Establishment, so will cause facility internal-wall concrete for a long time
Fragmentation falls off, and destroys the stable structure of facility carrying.In order to control the damage effect of fragmentation, as shown in figure 5, facility of the present invention
Inner liner portion is loaded on inner wall, inner wall is can protect and is not damaged, it is ensured that carries entire facility, and liner can carry out in time
Replacement, it is ensured that the service life of facility.
Furthermore destruction of the flexible inner lining material in addition to fragmentation, slungshot can be prevented is chosen, also has and cuts down impact
The effect of wave.This is because general explosive charge when target range powder charge has certain distance, is played detonation and is mainly answered
Consider the effect of air-shock wave.There are three the parameters for describing air-shock wave: peak overpressure, positive pressure time and momentum.
Peak value of shock wave overpressure indicates the amount of shock wave momentary action, and momentum expression continues in positive pressure time wide-ultra pressure
Actuating quantity.
Steel material has good plasticity, shock motion to liner above formula, and energy meeting some is transmitted on Steel material
Make Steel material that elastic deformation or plastic deformation occur after being absorbed, shock wave can also be weakened some, while also protect
The inner wall of facility.
The formation of fragmentation is related with the structure of target is destroyed.Explosive payload C and the ratio of metal shell mass M are β, and explosive is quick-fried
Speed is the Initial Velocities of Fragments of the destruction target of D are as follows:
Quality mf, front face area S, pneumatic drag coefficient CDFragmentation quick-fried heart x of distance in the air of density p position speed
Degree decaying are as follows:
For forming the fragment of size distribution maximum probability after the explosion of waste and old explosive, v is takenxFor Penetration Speed, use
The method of finite element analysis calculates fragment to the Penetration Depth of inner lining structure, to obtain the thickness of inner lining structure.
The length of fragment is taken to take 10mm, width that 10mm, height is taken to take 10mm in practice, inner lining material is steel plate, according to upper face velocity
V is calculated in decay formulax=1640m/s, as Penetration Speed are calculated using ANSYS with a thickness of 8mm steel plate by penetration
It penetrates;While being penetrated with a thickness of the steel plate of 10mm by penetration, the kinetic energy of fragmentation is also substantially depleted;With a thickness of the steel of 12mm
After plate is not pierced in the penetration by fragmentation, therefore the steel plate that the inner lining structure designed is 12mm thickness can protect completely
The Reinforced Concrete Materials in face.On the one hand inner lining structure can protect inner wall and not be damaged, it is ensured that carry entire facility, another party
Face liner can be replaced in time, extend the service life of facility.