CN214940041U

CN214940041U - Water leakage prevention structure of diaphragm wall

Info

Publication number: CN214940041U
Application number: CN202121075302.7U
Authority: CN
Inventors: 崔寿凯; 高辉
Original assignee: China Construction Eighth Engineering Division Co Ltd
Current assignee: China Construction Eighth Engineering Division Co Ltd
Priority date: 2021-05-19
Filing date: 2021-05-19
Publication date: 2021-11-30
Anticipated expiration: 2031-05-19

Abstract

The utility model discloses a water leakage prevention structure of a diaphragm wall, which comprises a diaphragm wall and a lining wall; the grouting device is characterized in that a self-adhesive waterproof layer is arranged between the diaphragm wall and the inner lining wall, a plurality of grouting holes are formed in the bottom end of the inner lining wall in a penetrating mode, grouting valve pipes used for guiding grouting liquid to be injected between the diaphragm wall and the self-adhesive waterproof layer or between the self-adhesive waterproof layer and the inner lining wall are installed in the grouting holes, and a plurality of exhaust holes used for exhausting in the grouting process are formed in the upper end of the inner lining wall in a penetrating mode. The utility model has the advantages of reasonable design, overall structure's construction is nimble convenient, can be quick, effective processing under the complicated geological conditions of rich water weak soil area ultra-deep foundation ditch ground even wall coincide wall interior welt leakage water problem, guaranteed that the basement construction normally develoies and ground even wall outside water level is stable to guaranteed that the foundation ditch is stable and complicated all ring edge borders, the practicality is strong.

Description

Water leakage prevention structure of diaphragm wall

Technical Field

The utility model relates to a ground is wall construction technical field even, especially relates to a ground is wall leak protection water structure even.

Background

With the acceleration of the urbanization process, the urban land is more and more tense, and the urban construction is developed towards the ultrahigh and ultra-deep direction. The supporting and protecting mode of the underground continuous wall of the deep foundation pit is more and more commonly adopted, the construction process is that the construction is carried out according to the width of the groove section, the joints are connected by adopting I-shaped steel joints, and the joint parts of two adjacent groove sections are the weak points of water leakage. In addition, because the diaphragm wall construction process is complicated, the uncertainty of underground conditions, improper operation can cause the problem of water leakage, and the diaphragm wall laminated wall has the problems of construction defects of a waterproof layer, impermeability of lining wall concrete, construction quality and the like, and the diaphragm wall generates lateral displacement under the action of the soil pressure outside the foundation pit and the water pressure in the water-rich soft soil complex geological environment; the quality defect of the diaphragm wall construction easily causes water leakage. The leakage water penetrates through the waterproof layer and the inner lining wall, so that the water leakage of the basement is caused, the normal construction of the basement cannot be carried out, in addition, the engineering construction is carried out at the centers of various high-rise forest stand cities, the outer wall of the engineering basement is very close to the red line of the engineering land, the long-time water leakage not only influences the engineering construction of the basement, but also causes the water level change of the outer side of the foundation pit, especially the water level change of the pressure-bearing water, causes the uneven settlement of peripheral buildings, pipelines and roads, causes the inestimable risk, and easily causes the damage of the enclosure structure or the secondary water leakage of the basement when the water leakage is not properly treated, so that the leakage risk is increased.

Disclosure of Invention

An object of the utility model is to provide a ground is wall leak protection water structure even, can carry out effective shutoff to the earth of basement outside even the seepage water between wall and interior welt to even the quality defect of wall coincide wall and waterproof layer is repaired to the ground.

The utility model discloses a realize like this:

the utility model provides a ground is wall leak protection water structure even, includes ground even wall and interior welt, be provided with from the formula of gluing waterproof layer between ground even wall and the interior welt, interior welt bottom runs through and has seted up a plurality of slip casting holes, install in the slip casting hole and be used for guiding slip casting liquid to pour into the slip casting valve pipe between ground even wall and the formula of gluing waterproof layer or between self-gluing waterproof layer and the interior welt, interior welt upper end runs through and sets up a plurality of exhaust holes that are used for carrying on slip casting in-process.

And the gap between the grouting hole and the grouting valve pipe is filled with kelp, and the kelp is wound on the grouting valve pipe.

The grouting liquid is formed by mixing cement liquid slurry and water glass liquid slurry.

And the surface of the inner lining wall is coated and filled with rapid hardening cement at the position of the grouting hole.

The grouting equipment is a high-pressure grouting machine.

The utility model has the advantages of reasonable design, overall structure's construction is nimble convenient, can be quick, effective processing under the complicated geological conditions of rich water weak soil area ultra-deep foundation ditch ground even wall coincide wall interior welt leakage water problem, guaranteed that the basement construction normally develoies and ground even wall outside water level is stable to guaranteed that the foundation ditch is stable and complicated all ring edge borders, the practicality is strong.

Drawings

FIG. 1 is a schematic view of the whole structure of the diaphragm wall and self-adhesive waterproof layer grouting of the anti-leaking structure of diaphragm wall of the present invention;

FIG. 2 is an enlarged view of the structure at A in FIG. 1 of the water leakage preventing structure of the diaphragm wall of the present invention;

FIG. 3 is a schematic view of the whole structure of the inner lining wall and the self-adhesive waterproof layer grouting of the water leakage preventing structure of the diaphragm wall of the present invention;

fig. 4 is an enlarged view of the structure at the position B in fig. 3 of the water leakage preventing structure of the diaphragm wall of the present invention.

In the figure, 1, a ground connecting wall; 2. lining a wall; 3. a self-adhesive waterproof layer; 4. grouting holes; 5. grouting valve pipes; 6. an exhaust hole; 7. kelp.

Detailed Description

The invention will be further explained with reference to the drawings and the specific embodiments.

Referring to fig. 1 to 4, the water leakage preventing structure for the diaphragm wall comprises a diaphragm wall 1 and an inner lining wall 2, wherein a self-adhesive waterproof layer 3 is arranged between the diaphragm wall 1 and the inner lining wall 2, a plurality of grouting holes 4 are formed in the bottom end of the inner lining wall 2 in a penetrating manner, grouting valve pipes 5 for guiding grouting liquid to be injected between the diaphragm wall 1 and the self-adhesive waterproof layer 3 or between the self-adhesive waterproof layer 3 and the inner lining wall 2 are installed in the grouting holes 4, and a plurality of exhaust holes 6 for exhausting in a grouting process are formed in the upper end of the inner lining wall 2 in a penetrating manner.

And a gap between the grouting hole 4 and the grouting valve pipe 5 is filled with kelp 7, and the kelp 7 is wound on the grouting valve pipe 5. In this embodiment, kelp 7 absorbs water and expands, can effectively fill up the clearance between slip casting valve pipe 5 and grouting hole 4, promotes the leakproofness of slip casting valve pipe 5 installation, has reduced the slip casting in-process thick liquid and has flowed out from the clearance between slip casting valve pipe 5 and grouting hole 4.

The grouting liquid is formed by mixing cement liquid slurry and water glass liquid slurry. In the embodiment, the cement is added with water and stirred to form slurry which can be hardened in the air or in water and can firmly bond materials such as sand, stone and the like together; the water glass is a mineral adhesive, has excellent adhesive force, makes full use of the advantages of the two materials, and has obvious leaking stoppage effect and reinforcing effect by mixing the two materials according to a certain proportion.

And quick-hardening cement is smeared and filled on the surface of the inner lining wall 2 at the position of the grouting hole 4. In the embodiment, the position of the grouting hole 4 is coated with the rapid hardening cement, and a gap between the grouting hole 4 and the grouting valve pipe 5 is further plugged, so that the installation tightness of the grouting valve pipe 5 is further improved.

The grouting equipment is a high-pressure grouting machine. In the embodiment, the high-pressure grouting machine is a professional machine for structural high-pressure chemical grouting and using single-liquid chemical grouting materials, and has ultrahigh pressure without an air pressure source, so that the construction is rapid.

During construction, firstly, grouting between the underground diaphragm wall 1 and the self-adhesive waterproof layer 3 is carried out, as shown in figures 1 and 2, the thickness of the underground diaphragm wall 1 is 1200mm, the thickness of the self-adhesive waterproof layer 3 is 4mm, the thickness of the lining wall 2 is 400mm, according to the leakage condition, a grouting hole 4 is drilled at the position 500mm away from the foundation slab, the grouting hole 4 penetrates through the self-adhesive waterproof layer 3 and the lining wall 2, the diameter is 50mm, a grouting valve pipe 5 is embedded, the diameter is 25mm, kelp 7 is wound on the grouting valve pipe 5 to fill the gap between the grouting hole 4 and the grouting valve pipe 5, then an exhaust hole 6 is arranged, then, grouting is formed by mixing cement-water glass double-liquid grout, grouting is injected into the grouting valve pipe 5 through a high-pressure grouting machine, the leakage condition of the side wall of the lining wall 2 is observed in the grouting process, the grouting liquid fills the gap between the underground diaphragm wall 1 and the self-adhesive waterproof layer 3 from bottom to top along the wall surface, and (4) observing the exhaust holes 6 at the upper part of the diaphragm wall 1, stopping grouting when grouting liquid overflows, and recording the leakage condition, grouting pressure, grouting time, grouting amount and the like. After grouting is finished, after no water leakage is confirmed, the grouting valve pipe 5 is closed, kelp 7 is further used for filling and compacting around the grouting valve pipe 5, repair and sealing treatment is carried out by using quick-hardening cement, grouting reinforcement in a water leakage range is completed, the leakage condition of the lining wall 2 is carefully observed and analyzed, secondary drilling and pipe burying grouting is carried out on the lining wall 2 still having side wall leakage water according to grouting effect analysis and judgment, as shown in figures 3 and 4, the difference of the above grouting is that the grouting hole 4 of secondary drilling and pipe burying grouting cannot drill through the self-adhesive waterproof layer 3, the drilling depth is the thickness of the lining wall 2, the grouting valve pipe 5 extends into the grouting hole 4 and is smaller than the thickness of the lining wall 2 by about 50mm, the secondary grouting is mainly supplement of poor primary grouting effect, and extrusion water leakage is carried out between the lining wall 2 and the self-adhesive waterproof layer 3 and grouting materials are filled.

The utility model discloses the efficient has solved the condition that the foundation ditch outside water in underground construction stage and basement work progress pierces through the interior wall infiltration basement, and the slip casting liquid adopts the biliquid slip casting of cement and sodium silicate, makes full use of the advantage of two kinds of materials, and not only the leaking stoppage effect is more obvious, but also has the effect of reinforcing, simultaneously in the utility model discloses, can adopt two or many high-pressure slip casting machines to carry out the slip casting simultaneously during the construction, the construction is nimble, save time; compared with other processes, the method completely meets the requirements of safe, efficient and environment-friendly construction, and in addition, the main construction equipment is an electric drill and a grouting machine, so that the operation is convenient and light, and the field operation is easy; the high-pressure grouting machine is high in pressure and flow, the reaction speed of the cement-water glass double-liquid slurry and water is high, water can be quickly stopped, the plugging effect is obvious, the high-pressure grouting machine has good corrosion resistance and other properties, the influence on the environment is small, and the high durability is realized.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, therefore, any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention should be included in the scope of the present invention.

Claims

1. A water leakage prevention structure of a diaphragm wall comprises a diaphragm wall (1) and an inner lining wall (2);

the method is characterized in that: the self-adhesive waterproof wall is characterized in that a self-adhesive waterproof layer (3) is arranged between the underground diaphragm wall (1) and the inner lining wall (2), a plurality of grouting holes (4) are formed in the bottom end of the inner lining wall (2) in a penetrating mode, grouting valve pipes (5) used for guiding grouting liquid to be injected between the underground diaphragm wall (1) and the self-adhesive waterproof layer (3) or between the self-adhesive waterproof layer (3) and the inner lining wall (2) are installed in the grouting holes (4), and a plurality of exhaust holes (6) used for exhausting in the grouting process are formed in the upper end of the inner lining wall (2) in a penetrating mode.

2. The diaphragm wall leakage prevention structure of claim 1, wherein: and a gap between the grouting hole (4) and the grouting valve pipe (5) is filled with a kelp (7), and the kelp (7) is wound on the grouting valve pipe (5).

3. The diaphragm wall leakage prevention structure of claim 1, wherein: the grouting liquid is formed by mixing cement liquid slurry and water glass liquid slurry.

4. The diaphragm wall leakage prevention structure of claim 1, wherein: and the surface of the inner lining wall (2) is coated and filled with rapid hardening cement at the position of the grouting hole (4).

5. The diaphragm wall leakage prevention structure of claim 1, wherein: the grouting equipment is a high-pressure grouting machine.