CN115573373A - Plugging device and method for underground concrete permeable wall - Google Patents

Abstract

The invention discloses a plugging device and method for an underground concrete permeable wall. The invention carries out preliminary plugging on the leakage position through the plugging plate, carries out drainage and grouting operation through the diversion action of the diversion pipe, has simple structure and convenient construction, effectively ensures the high efficiency and timeliness when treating serious leakage of the underground concrete wall, prevents the envelope structure from being damaged and the surrounding from sinking due to overlarge water seepage amount and sand gushing amount, has the advantages of simple process and easy operation and lower cost, and can be widely applied to plugging serious leakage of the underground concrete wall.

Description

Plugging device and method for underground concrete penetration wall

technical field

The invention relates to the field of foundation pit engineering, in particular to a plugging device and method for underground concrete to infiltrate a wall.

Background technique

With the continuous development of my country's economy in recent years, the transportation has become more convenient and efficient, and the construction of subway projects in my country has also continued to develop. The quality of the enclosure structure during the excavation and construction of the foundation pit is directly related to the safety of the surrounding environment of the entire foundation pit construction machine. . Due to the influence of various factors in the construction process, there is generally a certain degree of leakage in the enclosure structure after the construction is completed. However, in the construction of the underground concrete wall foundation pit of the subway, water leakage is the most common problem, which is not only for the next step The construction has brought great difficulties, and also caused great losses to quiet benefits such as enterprises, and it is very easy to cause related subsidence accidents, which seriously endanger the safe operation of the subway.

Contents of the invention

The technical problem to be solved by the present invention is to provide a sealing device and method for underground concrete wall penetration, so as to effectively seal the leakage part of the concrete wall.

The technical solution adopted by the present invention to solve the technical problem is: the plugging device for underground concrete penetration wall, including diversion grouting pipe, plugging diversion steel plate and grouting device, the plugging diversion steel plate is fixed It is arranged at the wall where the leaking part is located, and a through hole is opened in the middle of the sealing and diversion steel plate, and the diversion grouting pipe is placed in the through hole and fixedly connected with the sealing and diversion steel plate. A sealing structure is provided between the edge of the diversion steel plate and the wall; the side of the diversion grouting pipe away from the wall is provided with a valve switch; Outer port connection of slurry pipe.

Further, the blocking guide steel plate is fixed on the wall through expansion bolts.

Further, the sealing structure includes water-swellable rubber arranged around the edge of the sealing guide steel plate.

Further, the diameter of the through hole of the plugging and diversion steel plate is 25 mm to 35 mm.

The present invention solves its technical problem and also adopts a kind of technical scheme to be: be used for the plugging method of underground concrete penetration wall, implement according to above-mentioned sealing device for underground concrete penetration wall, comprise the following steps:

S1: Determine the location of the leak point: clean the surface of the wall at the leak site to expose the concrete surface, and then determine the location of the leak point according to the water outlet on the wall;

S2: Install the sealing device: fix the sealing and diversion steel plate on the wall at the leaking part, insert the diversion grouting pipe into the leaking part of the wall through the through hole of the sealing and diversion steel plate, and insert the diversion grouting The pipe is welded with the plugging and diversion steel plate, and the outer end of the diversion grouting pipe is equipped with a valve switch, and then the prefabricated plugging steel plate is sealed;

S3: Grouting: After the sealing device is installed, open the valve to carry out the drainage operation. After the drainage operation is completed, the diversion grouting pipe is connected to the grouting device, and then the leakage space in the leaking part of the wall is filled by grouting , to achieve blocking;

S4: Sealing: After the grouting is completed, remove the valve switch on the diversion grouting pipe, and seal the diversion grouting pipe.

Further, in S2, the insertion end of the diversion grouting pipe is inserted into the soil outside the wall by 8-20mm; in S3, the injected grout forms a protruding structure on the outside of the wall.

Further: In S2, two layers of edge banding are set between the edge of the prefabricated sealing steel plate and the wall, the inner edge layer is set first, and then the outer edge layer is set; the inner edge layer is a mixture of veil and oil The outer edge layer is made of water-swellable rubber.

Further, in S3, the grout used for grouting includes cement slurry and water glass, and the volume ratio of cement slurry to water glass is 1.8-2.2.

Further, in S4, the outer port of the diversion grouting pipe is threadedly connected with flange bolts, and the strength grade of the flange bolts is 8.5-9.0.

Further, in S4, after the sealing of the diversion grouting pipe is completed, polyurethane is laid on the outside of the joint between the diversion grouting pipe and the flange bolt.

The beneficial effects of the present invention are: the present invention preliminarily seals the leaking part through the sealing plate, and carries out drainage and grouting operations through the diversion of the diversion pipe. The device used is simple in structure and convenient in construction, effectively ensuring The high efficiency and timeliness in dealing with serious leakage of underground concrete walls prevents damage to the enclosure structure and surrounding subsidence caused by excessive water seepage and sand gushing, and the sealing method has the advantages of simple process, easy operation and low cost The advantage of being low, so it can be widely used in the sealing of serious leakage of underground concrete walls.

Description of drawings

Fig. 1 is the front view of the structure before the grouting plugging provided by the embodiment of the present invention;

Fig. 2 is a structural sectional view before the grouting plugging provided by the embodiment of the present invention;

Fig. 3 is a structural sectional view after grouting plugging provided by an embodiment of the present invention;

Fig. 4 is a structural sectional view after grouting plugging provided by an embodiment of the present invention;

Explanation of reference signs: wall 1; outer edge sealing layer 2; inner edge sealing layer 3; sealing plate 4; valve switch 5; protruding structure 6; diversion pipe 7; leakage point 8; expansion bolt 9; polyurethane 10; Flange bolts 11.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Please refer to Fig. 1 to Fig. 4, the plugging device for underground concrete infiltrated wall according to the present invention includes a diversion pipe 7, a plugging plate 4 and a grouting device, and the plugging plate 4 is fixedly arranged at the leakage site At the wall 1, a through hole is opened in the middle of the blocking plate 4, and the guide tube 7 is placed in the through hole and fixedly connected with the blocking plate 4, and a sealing structure is provided between the edge of the blocking plate 4 and the wall 1; A valve switch 5 is provided on the side of the diversion pipe 7 away from the wall body 1; when grouting is performed, the grout outlet of the grouting device is connected to the outer port of the diversion pipe 7. The plugging device of the present invention performs preliminary plugging of the leakage site through the plugging plate 4, and performs drainage and grouting operations through the diversion of the diversion pipe 7; the device of the present invention is simple in structure, easy to operate, and convenient for construction. It effectively guarantees the high efficiency and timeliness when dealing with serious leakage of underground concrete walls, and prevents damage to the enclosure structure and surrounding subsidence caused by excessive water seepage and sand gushing.

Specifically, the blocking plate 4 is fixed on the wall body 1 through expansion bolts 9, which is convenient for installation, and the blocking plate 4 is firmly fixed.

Specifically, the sealing structure includes water-expandable rubber arranged around the edge of the sealing plate 4, which can expand itself when exposed to water, making it more closely in contact with the concrete, and further improving the water-stopping effect.

Specifically, the diameter of the through hole of the blocking plate 4 is 25 mm to 35 mm, and the size of the guide tube 7 is set correspondingly.

The sealing method for the underground concrete penetration wall of the present invention is implemented according to the above-mentioned sealing device for the underground concrete penetration wall, comprising the following steps:

S1: Determine the location of the leakage point 8: clean up the moss, weeds, or other covering impurities on the surface of the wall 1 at the leakage site, so that the concrete surface is exposed, and then determine the location of the leakage point 8 according to the water outlet on the wall;

S2: Install the blocking device: fix the blocking plate 4 on the wall 1 at the leaking part, insert the diversion tube 7 into the leaking part of the wall 1 through the through hole of the blocking plate 4, and connect the diversion tube 7 to the leaking part. The sealing plate 4 is welded, the outer end of the guide pipe 7 is installed with a valve switch 5, and then the prefabricated sealing steel plate is edge-sealed;

Preferably, the insertion end of the draft pipe 7 is inserted into the soil outside the wall 1 by 8-20 mm;

Preferably, two layers of edge banding layers are set between the edge of the prefabricated sealing steel plate and the wall 1, the inner edge banding layer 3 is set first, and then the outer edge banding layer 2 is set; the inner edge banding layer 3 is a mixture of veil and grease material, and the outer edge layer 2 adopts water-swellable rubber.

S3: Grouting: After the sealing device is installed, open the valve to carry out the drainage operation. After the drainage operation is completed, the diversion pipe 7 is connected to the grouting device, and then the leakage space in the leakage part of the wall 1 is filled by grouting , to achieve blocking;

Preferably, the grout used for grouting includes cement slurry and water glass, and the volume ratio of cement slurry to water glass is 1.8-2.2.

S4: Sealing: After the grouting is completed, the valve switch 5 on the diversion pipe 7 is disassembled, and the diversion pipe 7 is sealed.

Preferably, the outer port of the draft pipe 7 is threadedly connected with the flange bolt 11, and the strength grade of the flange bolt 11 is 8.5-9.0.

Preferably, after the sealing of the guide tube 7 is completed, polyurethane 10 is laid on the outside of the joint between the guide tube 7 and the flange bolts 11 .

Example:

The present invention is based on the plugging method for underground concrete penetration wall, and specifically provides an embodiment, including the following steps:

S1: Determine the location of the leakage point 8: remove the moss, weeds, or other covering impurities on the surface of the wall 1 at the leakage location, so that the concrete surface is exposed, and then determine the location of the leakage point 8 according to the water outlet on the wall;

S2: Install the blocking device: Install the blocking plate 4 on the wall 1 at the leakage site, so that the water outlet of the leakage point 8 is facing the through hole with a diameter of 30mm on the blocking plate 4, and then install the sealing plate 4 4 The expansion bolt 9 with a diameter of 12mm is driven into the edge to fix it, so as to ensure the unimpeded flow of leaking water; the diversion pipe 7 is inserted into the leaking part of the wall 1 through the through hole of the sealing plate 4, so that the diversion pipe 7 can go as deep as possible In the leak point gap, the diversion pipe 7 is welded to the sealing plate 4, and the valve switch 5 is installed at the outer end of the diversion pipe 7, and then the prefabricated sealing steel plate is edge-sealed; Two layers of edge banding layers are set between 1, the inner edge banding layer 3 is set first, and then the outer edge banding layer 2 is set; the inner edge banding layer 3 is a mixture of veil and oil, and the outer edge banding layer 2 is made of water-swellable rubber ;

If the leakage point 8 of the leakage part runs through the whole body of wall, the insertion end of the guide pipe 7 is inserted into the soil body outside the body of wall 1 by 14 mm, so that the side of the body of wall 1 close to the soil body can be grouted. During grouting, the injected grout forms a protruding structure 6 on the outside of the wall 1, which plays a role of sealing and waterproofing the wall. If the leakage point 8 of the leakage site only runs through the side part of the wall close to the sealing plate 4, the insertion end of the guide pipe 7 can be aligned with the leakage point 8, and it is sealed by grouting;

S3: Grouting: After the plugging device is installed, open the valve for drainage operation. After the drainage operation is completed, the diversion pipe 7 is externally connected to the grouting device. The slurry used for grouting includes cement slurry and water glass, cement slurry and water The volume ratio of the glass is 2; then the leakage space in the leakage part of the wall 1 is filled by grouting to realize sealing;

S4: Sealing: After the grouting is completed, disassemble the valve switch 5 on the diversion pipe 7 to realize the sealing process. The outer port of the diversion pipe 7 is connected to the thread by the flange bolt 11 to realize the sealing. The strength grade of the flange bolt 11 is 8.8 ; After the sealing of the diversion pipe 7 is completed, the polyurethane 10 is evenly laid on the outside of the joint between the diversion pipe 7 and the flange bolt 11, and the water-stopping effect is checked.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. The plugging device for underground concrete seepage wall, it is characterized in that: comprise diversion tube (7), plugging plate (4) and grouting device, described plugging plate (4) is fixedly arranged on seepage Where the site is located at the wall (1), a through hole is opened in the middle of the blocking plate (4), and the guide tube (7) is placed in the through hole and fixedly connected with the blocking plate (4). A sealing structure is provided between the edge of the blocking plate (4) and the wall (1); a valve switch (5) is provided on the side of the guide pipe (7) away from the wall (1); when grouting , the grout outlet of the grouting device is connected to the outer port of the draft pipe (7). 2. The sealing device for underground concrete penetration wall according to claim 1, characterized in that: the sealing plate (4) is fixed on the wall (1) by expansion bolts (9). 3. The sealing device for underground concrete penetration wall according to claim 1, characterized in that: said sealing structure comprises water-swellable rubber arranged around the edge of the sealing plate (4). 4. The sealing device for underground concrete penetration wall according to claim 1, characterized in that: the diameter of the through hole of the sealing plate (4) is 25mm-35mm. 5. The sealing method for underground concrete penetration wall is characterized in that: according to any one of claim 1 to claim 4, the sealing device for underground concrete penetration wall is implemented, comprising the following steps: S1: Determine the location of the leakage point (8): clean the surface of the wall (1) at the leakage site to expose the concrete surface, and then determine the location of the leakage point (8) according to the water outlet on the wall; S2: Install the blocking device: fix the blocking plate (4) on the wall (1) at the leakage site, and insert the diversion pipe (7) into the wall (1) through the through hole of the blocking plate (4) For the leaking part, weld the diversion pipe (7) and the sealing plate (4), install the valve switch (5) on the outer end of the diversion pipe (7), and then perform edge sealing on the prefabricated sealing plate; S3: Grouting: After the sealing device is installed, open the valve to carry out the drainage operation. After the drainage operation is completed, the diversion pipe (7) is externally connected to the grouting device, and then the leaking part of the wall (1) is drained by grouting. The leakage space is filled to achieve plugging; S4: Sealing: After the grouting is completed, disassemble the valve switch (5) on the guide tube (7), and seal the guide tube (7). 6. The sealing method for underground concrete penetration wall as claimed in claim 5, characterized in that: in S2, the insertion end of the draft pipe (7) is inserted into the soil body 8 outside the wall (1) ~20mm; in S3, the injected grout forms a protruding structure (6) on the outside of the wall (1). 7. as claimed in claim 5, is used for the plugging method of underground concrete infiltration wall, it is characterized in that: in S2, two layers of edge sealing layers are set between prefabricated plugging steel plate edge and body of wall (1), first set The inner edge banding layer (3) is further provided with an outer edge banding layer (2); the inner edge banding layer (3) is a mixture of gauze and oil, and the outer edge banding layer (2) is made of water-swellable rubber. 8. as claimed in claim 5, it is characterized in that: in S3, the grout for grouting comprises cement slurry and water glass, and the volume ratio of cement slurry and water glass is 1.8～2. 2.2. 9. as claimed in claim 5, be used for the plugging method of underground concrete penetration wall, it is characterized in that: in S4, described draft pipe (7) outer port is connected with its screw thread by flange bolt (11), described The strength grade of the flange bolts (11) is 8.5-9.0. 10. the plugging method that is used for underground concrete penetration wall as claimed in claim 9, it is characterized in that: in S4, after draft tube (7) sealing is finished, after draft tube (7) and flange bolt (11 ) polyurethane (10) is laid on the outside of the connection part.

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