CN104234065A - Leakage drainage structure of waterproof curtain - Google Patents

Abstract

The invention provides a leakage drainage structure of a water-stop curtain, which is arranged at the leakage part of the foundation pit and constructed as a support structure, and the structure includes a hole body arranged at the leakage part of the foundation pit, and a drainage pipe is installed in the hole body , the drainage tube includes a needle section with a threaded buckle at the end, an extension section, and an end section, and is connected by a threaded button through a connecting cylinder. A plugging section is provided on the outer periphery of the connecting section for blocking, and a ball valve is provided on one side of the end section, and water seepage at the leaking part is eliminated through the ball valve. The effect of the present invention is that the structure is easy to operate, low in cost, and fast in construction speed, and can discharge the water body in the leaking part of the water-stop curtain in time, reduce the water and soil pressure in the leaking part, eliminate danger at the first time, ensure the safety of the foundation pit, and divert water at the same time The tube can be used repeatedly to achieve energy-saving effect.

Description

Waterproof curtain leakage drainage structure

technical field

The water-stop curtain of the present invention is a common water-stop structure in deep foundation pit engineering. When the water-stop curtain has serious leakage and no structural damage is caused, drainage combined with sealing measures are generally adopted. In particular, it relates to a leakage and drainage structure of a water-stop curtain, which can quickly remove the water body at the leakage part of the foundation pit, eliminate danger at the first time, and ensure the safety of the foundation pit.

Background technique

At present, urban construction is developing rapidly, and deep foundation pit projects are increasing day by day. Deep cement mixing piles and high-pressure jet grouting piles are often used as water-stop curtains in foundation pit engineering. Leakage of foundation pits is also relatively common, and engineering accidents caused by leakage of foundation pits are not uncommon across the country. The causes of foundation pit leakage are also more complicated. According to the severity of foundation pit leakage, common plugging methods include: high-pressure rotary spraying, double-liquid grouting, injection of foaming agent, water-tight plugging, filling expansion materials etc. The method of high-pressure rotary spraying and double-fluid grouting has obvious control effect on leakage, but the investment cost is relatively high. The method of injecting foam, water-tight plugging, and filling expansion materials is easy to operate and low in cost, but it cannot effectively eliminate the water existing in the leakage site, and cannot effectively and completely solve the leakage problem, resulting in increased water and soil pressure, and at the same time endangering the foundation. Pit safety.

Contents of the invention

The purpose of the present invention is to provide a water-stop curtain leakage and drainage structure, which is beneficial to solve the problems existing in the existing water-stop curtain leakage treatment technology, with less investment, quick results, and timely discharge of water.

In order to achieve the above object, the technical solution adopted by the present invention is to provide a water-stop curtain leakage and drainage structure, which is arranged at the leakage site of the foundation pit and construction of the support structure, wherein: the structure includes leakage in the foundation pit The hole body is arranged in the hole body, and a drainage tube is installed in the hole body. The drainage tube includes a needle section with a threaded buckle at the end, an extension section, and an end section, and is connected by a threaded button through the connecting cylinder. An anti-filtering water layer is arranged on the outer periphery, a plugging section is arranged on the outer periphery of the extension section for blocking, and a ball valve is arranged on one side of the end section, through which water seepage at the leaking part is eliminated.

The effect of the present invention is that the structure is simple to operate, low in cost, and fast in construction speed, and can discharge the water body in the leaking part of the water-stop curtain in time, reduce the water and soil pressure in the leaking part, eliminate danger at the first time, ensure the safety of the foundation pit, and divert water at the same time The tube can be used repeatedly to achieve energy-saving effect.

The water-stop curtain leakage drainage structure is adopted, and the cost of each seepage point is about 500 yuan. 30% of the time required for liquid grouting, and the effect of controlling leakage is equivalent. Compared with injection foaming, water-tight plugging, and filling expansion materials, the cost and construction speed are equivalent, but the leakage control effect is obviously better than these three methods.

Description of drawings

Fig. 1 is the schematic diagram of the section structure of the leakage and drainage structure of the water-stop curtain of the present invention;

Fig. 2 is the schematic diagram of the cross-sectional structure of the hole body of the present invention;

Fig. 3 is a schematic elevation view of the drainage tube of the present invention.

In the picture:

1. Hole body 2. Drainage tube 3. Reverse filter water layer 4. Blocking section 5. Needle section

6. Connecting barrel 7. Extension section 8 is the end section 9. Round hole 10. Wooden plug

11. Dense mesh 12. Ring steel plate 13. Ball valve 14. Expansion bolt

15. Plugging spirit 16. Quick-setting micro-expansion cement mortar 17. Water-stop curtain

18. Undisturbed soil 19. Supporting structure

Detailed ways

The leakage and drainage structure of the water-stop curtain of the present invention will be described in detail below in conjunction with the accompanying drawings.

The leakage and drainage structure of the water-stop curtain of the present invention, the structure is arranged at the leaking part of the foundation pit, and the construction of the support structure, the structure includes the hole body 1 arranged at the leakage part of the foundation pit, and the hole body 1 adopts artificial Or mechanically form a hole in the leaking part of the water-stop curtain, the hole diameter is 15cm, and the hole is reamed within 700mm of the end, and the hole diameter of the end is 250mm.

A drainage tube 2 is installed in the hole body 1, and the drainage tube 2 includes a needle section 5 with a threaded buckle at the end, an extension section 7, and an end section 8, and is connected with a threaded button through the connecting cylinder 6. The outer periphery of the needle section 5 is provided with an anti-filtration water layer 3, and the outer periphery of the extension section 7 is provided with a blocking section 4 for blocking, and a ball valve 13 is provided on one side of the end section 8, which can eliminate Water seeps from the leaking part.

The tube body of the needle section 5 has a length of 50 cm and a diameter of 10 cm. The surface is provided with a plurality of circular holes 9 with a diameter of 5 mm evenly distributed. The distance between the centers of every two circular holes 9 is 10 mm. On the surface of the body, the end of the needle section 5 is provided with a cork 10 for sealing, and the surface of the needle section 5 is wrapped with two layers of dense mesh 11 .

The extension section 7 is a plurality of extension sections connected through the connecting cylinder 6 to form a plurality of pipes with different lengths. The extension section 7 has a length of 50 cm and a diameter of 10 cm, which can be extended according to the depth of the hole body 1 .

The outer welded ring steel plate 12 of the end section 8 has a pipe body length of 50 cm and a diameter of 10 cm. A ball valve 13 is arranged in the middle of the end section 8, and the ring steel plate 12 is fixed on the support structure 19 by expansion bolts 14 , and sealed by Duleiling 15.

The reverse filter water layer 3 is divided into two layers of sand bags, I and II, and each layer is filled with well-graded sand and gravel materials. 5 on the surface of the pipe body, the particle size of sand and gravel materials in the second layer of sand bags is 3mm to 5mm, which is filled between the first layer of sand bags and the hole wall of the hole body 1, which can effectively intercept the sediment in the water and prevent the seepage of the water-stop curtain. Piping occurs at the leak location.

The plugging section 4 is plugged by filling quick-setting micro-expansion cement mortar 16 . A proper amount of micro-expansion agent is mixed into the quick-setting type micro-expansion cement mortar 16 to ensure that the plugging section can be compacted and to avoid lax plugging.

The leakage and drainage structure function of the water-stop curtain of the present invention is realized in this way:

1. Digging hole body 1: At the leaking part of the foundation pit, dig holes manually or mechanically. The hole body 1 is dug into a horizontal shape. The hole depth should be determined according to the actual leakage situation. The hole body 1 passes through the support structure 19 , The undisturbed soil 18 is dug to the leakage point of the water-stop curtain 17. The hole diameter of the hole body 1 is 15 cm, and the hole expansion treatment is performed within the range of 700 mm at the end of the hole body 1, and the hole diameter of the hole body 1 is 250 mm.

2. Assemble the drainage tube 2: Connect the needle section 5, the extension section 7, and the end section 8 through the connecting cylinder 6 to form the drainage tube 2 in the form of threaded buckles. The length of the drainage tube 2 should be connected with a plurality of extension sections 7 according to the depth of the hole. The top of the needle section 5 of the drainage tube 2 is sealed with a cork 10 , and at the same time, two layers of dense mesh 11 are wrapped on the surface of the needle section 5 . The pipe body has a length of 50 cm and a diameter of 10 cm, and a plurality of circular holes 9 with a diameter of 5 mm uniformly distributed on the surface.

3. Install the drainage pipe 2: First, backfill a layer of sand and gravel material with a graded second-layer sand bag at the enlarged end of the hole body, and use sand and gravel with a particle size between 3 and 5 mm. Put the well-graded first-layer sandbag sand and gravel into the sandbag with sand and gravel with a particle size between 1 and 3mm, wrap the sandbag on the needle section 5 of the drainage tube 2, and place the drainage tube 2 horizontally. Enter the hole body 1, and backfill the sand and gravel material of the second layer of sandbags again until the enlarged end is backfilled. Quick-setting micro-expansion cement mortar 16 is produced on site. The cement is quick-setting cement and mixed with an appropriate amount of micro-expansion admixture. Utilize the expansion bolt 14 to fix the circular steel plate 12 on the supporting structure 19, and the edge of the circular steel plate 12 is sealed with 15 circles of plugging spirit.

4. Drainage: After the ball valve 13 is opened, the leaking water can be discharged from the leaking part of the water-stop curtain 17. The drained water can be collected in containers such as iron barrels, and pumped out of the foundation pit with a submersible pump.

Claims (6)

1. A water-stop curtain leakage and drainage structure, which is arranged on the foundation pit leakage position and construction of the support structure, is characterized in that: the structure includes a hole body (1) arranged at the foundation pit leakage position, A drainage tube (2) is installed in the hole body (1), and the drainage tube (2) includes a needle section (5) with a threaded buckle at the end, an extension section (7), and an end section (8). The cylinder (6) is connected by a threaded button, and an anti-filtering layer (3) is provided on the outer periphery of the needle section (5), and a plugging section (4) is provided on the outer periphery of the extension section (7) to carry out For plugging, a ball valve (13) is provided on one side of the end section (8), and the water seepage at the leakage site is eliminated through the ball valve (13). 2. The water-stop curtain leakage drainage structure according to claim 1, characterized in that: the surface of the needle section (5) is provided with a plurality of evenly distributed circular holes (9), and every two circular holes (9) ) center distance is 10mm, the end of the needle section (5) is provided with a cork (10) to block, and the surface of the needle section (5) is wrapped with two layers of dense mesh (11). 3. The leakage and drainage structure of the water-stop curtain according to claim 1, characterized in that: the extension section (7) is a plurality of extension sections connected through the connecting cylinder (6) to form a variety of pipe bodies of different lengths . 4. The water-stop curtain leakage drainage structure according to claim 1, characterized in that: the outer welded ring steel plate (12) of the end section (8) is provided with a ball valve in the middle of the end section (8) (13), the ring steel plate (12) is fixed on the supporting structure (19) by the expansion bolt (14), and is sealed by the plugging spirit (15). 5. The leakage and drainage structure of the water-stop curtain according to claim 1, characterized in that: the reverse filter water layer (3) is divided into two layers of sand bags, I and II, and each layer is made of well-graded sand and gravel Material filling, the particle size of sand and gravel materials in the first layer of sand bags is 1mm ~ 3mm, filled on the surface of the pipe body of the needle section (5), the particle size of sand and gravel materials in the second layer of sand bags is 3mm to 5mm, filled in the Between the sand bag and the hole wall of the hole body (1), the sediment in the water can be effectively intercepted, and piping can be prevented from occurring at the leakage position of the water-stop curtain. 6. The water-stop curtain leakage drainage structure according to claim 1, characterized in that: the plugging section (4) is plugged by filling quick-setting micro-expansion cement mortar (16).