Anti-blocking foundation pit waterproof structure

Abstract

The utility model discloses an anti-clogging foundation pit waterproof structure which comprises an enclosure structure, a construction groove, a waterproof coiled material and a main body structure which are sequentially arranged on a fine aggregate concrete cushion layer in a foundation pit from outside to inside, the waterproof coiled material is laid on the outer side of the main body structure, and a water storage mechanism is arranged in the waterproof coiled material at the bottom of the main body structure. The bottom of the construction groove is filled with backfill soil after the drainage mechanism is installed, the water storage mechanism is connected with the drainage mechanism, and impurity filtering mechanisms are arranged on the water storage mechanism and the drainage mechanism. By arranging the waterproof coiled material, the water storage mechanism and the drainage mechanism, the foundation pit can be effectively waterproof; the EVA hot melt adhesive film is arranged on the surface of the self-adhesive waterproof roll, so that the adhesion of the waterproof roll can be ensured, and the waterproof capability is greatly improved; the coarse sand filter layer, the fine sand filter layer, the filter plate and the bucket-shaped drainage channel are laid in the drainage ditch, rainwater can be filtered and then drained, and impurities are prevented from blocking the water outlet pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation pit protection, in particular to an anti-blocking foundation pit waterproof structure. Background Art

[0002] The foundation construction of underground projects is mostly below the ground or external water level and groundwater level, so it is often affected by seepage, rainfall within the foundation pit and groundwater. In order to create a good condition for construction, foundation pit drainage becomes an important part of underground project construction; when the foundation slab of underground projects is constructed, if it is rainy season, surface water will gradually penetrate downward due to gravity factors. Water is easy to accumulate in the foundation pit, and rainwater will erode the foundation pit, causing damage to the inside of the foundation pit.

[0003] The existing waterproof construction technology for the side walls of the foundation pit of a subway station is to first apply a 20 cm thick cement mortar leveling layer on the inner side of the underground continuous wall, then lay the waterproof membrane on the leveling layer, and finally apply the main structure. However, in the construction technology of the construction joint and the induced joint, the water-stop membrane is often not in close contact with the concrete, resulting in the formation of bubbles or gaps; when laying the waterproof membrane on the underground continuous wall, the waterproof membrane is not in close contact with the concrete due to improper treatment of the bulge or depression of the ground-connected wall, resulting in the formation of bubbles, and for the waterproof membrane, the commonly used self-adhesive waterproof membrane is generally used, but this membrane can only guarantee a short effective bonding time, and the bonding effect of the membrane is greatly reduced at high temperatures, which is very easy to cause debonding, and the waterproof effect is not obvious. Summary of the invention

[0004] In view of the deficiencies in the prior art, the utility model provides an anti-clogging foundation pit waterproof structure, which solves the problems mentioned in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a kind of anti-clogging foundation pit waterproof structure, including a retaining structure, a construction trench, a waterproof membrane and a main structure which are arranged on a fine stone concrete cushion layer in the foundation pit from the outside to the inside in sequence, the waterproof membrane is laid on the outside of the main structure, a water storage mechanism is arranged in the waterproof membrane at the bottom of the main structure, a drainage mechanism is installed at the bottom of the construction trench and then filled with backfill soil, the water storage mechanism and the drainage mechanism are connected, and impurity filtering mechanisms are arranged on the water storage mechanism and the drainage mechanism.

[0006] Furthermore, the main structure includes side walls, and a foundation pit top plate, an underground floor plate and a foundation pit bottom plate connected on the side walls from top to bottom in sequence, a construction groove is provided on the outer side of the side walls and the foundation pit bottom plate, a waterproof membrane is connected to the outer side of the side walls and the foundation pit bottom plate through the construction groove, and a water storage mechanism is provided in the waterproof membrane at the bottom of the foundation pit bottom plate.

[0007] Furthermore, the water storage mechanism includes a plurality of reinforced column holes arranged in an equidistant array in the waterproof membrane at the bottom of the foundation pit floor, the reinforced column holes are connected by partitions to form a plurality of water storage chambers, and the reinforced column holes are filled with rubber columns.

[0008] Furthermore, a gap is left between the partition and the waterproof coiled material at the bottom of the reinforced column hole.

[0009] Furthermore, the drainage mechanism includes a water outlet pipe arranged at the bottom of the construction trench, and the water storage chamber near the water outlet pipe is connected to the water outlet pipe through an overflow pipe.

[0010] Furthermore, the impurity filtering mechanism includes drainage ditches arranged on the bottom plate of the foundation pit and in the construction trench, and the drainage ditch is sequentially laid with a coarse sand filter layer, a fine sand filter layer, a filter plate and a bucket-shaped drainage channel from top to bottom. The bucket-shaped drainage channel on the bottom plate of the foundation pit is connected to the water storage chamber, and the bucket-shaped drainage channel between the outlet pipe and the backfill soil is connected to the outlet pipe; the drainage ditch in the construction trench is between the outlet pipe and the backfill soil.

[0011] Furthermore, the waterproof membrane adopts a self-adhesive waterproof membrane, and an EVA hot-melt adhesive film is arranged on the surface of the self-adhesive waterproof membrane.

[0012] Compared with the existing technology, the utility model has the following beneficial effects: the utility model can effectively waterproof the foundation pit by arranging waterproof membrane, water storage mechanism and drainage mechanism; by arranging EVA hot-melt adhesive film on the surface of self-adhesive waterproof membrane, the adhesion of waterproof membrane can be ensured, and the waterproof ability is greatly improved; by laying coarse sand filter layer, fine sand filter layer, filter plate and bucket-shaped drainage channel in the drainage ditch, rainwater can be filtered before being discharged, avoiding impurities from clogging the outlet pipe; by filling rubber columns in the reinforcing column holes, the overall stability of the water storage mechanism can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is an overall cross-sectional view of the utility model.

[0014] Figure 2 This is a schematic diagram of the water storage mechanism structure of the utility model.

[0015] Figure 3 This is a schematic diagram of the partition structure of the utility model.

[0016] Figure 4 For the utility model Figure 1 Enlarged view of point A in the middle.

[0017] In the figure: 1. water storage chamber; 2. foundation pit bottom plate; 3. reinforced column hole; 4. waterproof membrane; 5. fine stone concrete cushion layer; 6. overflow pipe; 7. coarse sand filter layer; 701. fine sand filter layer; 702. filter plate; 703. bucket-shaped drainage channel; 8. outlet pipe; 9. retaining structure; 11. construction trench; 12. side wall; 13. underground floor; 14. backfill soil; 15. foundation pit top plate; 16. partition; 17. rubber column. DETAILED DESCRIPTION

[0018] like Figure 1-Figure 4 As shown, the utility model provides a technical solution: a clogging-proof foundation pit waterproof structure, comprising a retaining structure 9, a construction trench 11, a waterproof membrane 4 and a main structure which are sequentially arranged on a fine stone concrete cushion layer 5 in the foundation pit from outside to inside, the waterproof membrane 4 is laid on the outside of the main structure, a water storage mechanism is arranged in the waterproof membrane 4 at the bottom of the main structure, a drainage mechanism is installed at the bottom of the construction trench 11 and backfilled with backfill soil 14, the water storage mechanism and the drainage mechanism are connected, and impurity filtering mechanisms are arranged on the water storage mechanism and the drainage mechanism; the retaining structure 9 can adopt an underground continuous wall; the utility model can effectively waterproof the foundation pit by arranging the waterproof membrane 4, the water storage mechanism and the drainage mechanism.

[0019] Among them, the main structure includes a side wall 12, and a foundation pit top plate 15, an underground floor slab 13 and a foundation pit floor slab 2 connected to the side wall 12 from top to bottom in sequence, a construction trench 11 is arranged on the outside of the side wall 12 and the foundation pit floor slab 2, and a waterproof membrane 4 is connected to the outside of the side wall 12 and the foundation pit floor slab 2 through the construction trench 11, and a water storage mechanism is arranged in the waterproof membrane 4 at the bottom of the foundation pit floor slab 2.

[0020] The water storage mechanism includes a plurality of reinforcing column holes 3 arranged in an equidistant array in a waterproof roll 4 at the bottom of the foundation pit floor 2, and the reinforcing column holes 3 are connected by a partition 16 to form a plurality of water storage chambers 1, and the reinforcing column holes 3 are filled with rubber columns 17; by filling the rubber columns 17 in the reinforcing column holes 3, the overall stability of the water storage mechanism can be improved;

[0021] A gap is left between the partition plate 16 and the waterproof coiled material 4 at the bottom of the reinforcing column hole 3 to facilitate the flow of water between the water storage chambers 1.

[0022] The drainage mechanism includes a water outlet pipe 8 arranged at the bottom of the construction trench 11 , and the water storage chamber 1 near the water outlet pipe 8 is connected to the water outlet pipe 8 through an overflow pipe 6 .

[0023] Among them, the impurity filtering mechanism includes a drainage ditch arranged on the foundation pit bottom plate 2 and in the construction trench 11, and the drainage ditch is laid with a coarse sand filter layer 7, a fine sand filter layer 701, a filter plate 702 and a bucket-shaped drainage channel 703 from top to bottom in sequence, the bucket-shaped drainage channel 703 on the foundation pit bottom plate 2 is connected to the water storage chamber 1, and the bucket-shaped drainage channel 703 between the outlet pipe 8 and the backfill soil 14 is connected to the outlet pipe 8; the drainage ditch in the construction trench 11 is between the outlet pipe 8 and the backfill soil 14; the bucket-shaped drainage channel 703 can adopt a funnel; by laying a coarse sand filter layer 7, a fine sand filter layer 701, a filter plate 702 and a bucket-shaped drainage channel 703 in the drainage ditch, rainwater can be filtered before being discharged to avoid impurities clogging the outlet pipe.

[0024] Among them, the waterproof membrane 4 adopts a self-adhesive waterproof membrane, and an EVA hot-melt adhesive film is arranged on the surface of the self-adhesive waterproof membrane; EVA hot-melt adhesive is a solvent-free, water-free solid fusible polymer, which is solid at room temperature and melts into a liquid adhesive that can flow and has a certain viscosity when heated. After cooling, it can re-solidify to form a bond between materials; EVA hot-melt adhesive film has the characteristics of solidified blocks, low pollution, strong adhesion and environmental protection; by arranging EVA hot-melt adhesive film on the surface of the self-adhesive waterproof membrane, the adhesion of the waterproof membrane 4 can be guaranteed, and the waterproof ability can be greatly improved.

[0025] In summary, the working process of the utility model is as follows: when rainwater enters the foundation pit, it is filtered through the coarse sand filter layer 7, the fine sand filter layer 701, and the filter plate 702 in the drainage ditch on the foundation pit bottom plate 2, and then enters the bucket-shaped drainage channel 703. The bucket-shaped drainage channel 703 collects the filtered rainwater into the water storage chamber 1, and the rainwater in the water storage chamber 1 flows into the outlet pipe 8 through the overflow pipe 6 for discharge; when there is infiltration water in the construction groove 11, it will be filtered through the coarse sand filter layer 7, the fine sand filter layer 701, and the filter plate 702 in the drainage ditch of the construction groove 11, and then enter the bucket-shaped drainage channel 703. The bucket-shaped drainage channel 703 collects the filtered rainwater into the outlet pipe 8 for discharge;

[0026] When the waterproof mechanism needs to be installed, the outline of the foundation pit is first translated outward by 80 cm to 100 cm, and a distance of 80 cm to 100 cm is reserved between the main structure and the enclosure structure 9 to facilitate manual laying of the waterproof membrane 4;

[0027] Setting up underground continuous wall of foundation pit;

[0028] The waterproofing and drainage construction of the main structure is carried out in the following specific process: first, a fine stone concrete cushion layer 5 is applied at the bottom of the foundation pit, and the fine stone concrete cushion layer 5 is a 150cm thick C20 fine stone concrete; secondly, a waterproofing membrane 4 is laid, and the overlap width between adjacent waterproofing membranes 4 should not be less than 15cm, so as to facilitate the seamless connection between adjacent waterproofing membranes 4; then, a water storage mechanism is set on the waterproofing membrane 4, and another layer of waterproofing membrane 4 is laid on the water storage mechanism, and finally the main structure is cast;

[0029] After the main structure is cast, the waterproof membrane 4 is laid on the side of the side wall 12 of the main structure that is in the foundation pit. The laying of the waterproof membrane 4 is stopped when it reaches the top plate 15 of the foundation pit. A drainage mechanism is set at the bottom of the construction trench 11 formed between the side wall 12 and the retaining structure 9, and the drainage mechanism and the water storage mechanism are connected. Drainage ditches connected to the drainage mechanism and the water storage mechanism are respectively set on the drainage mechanism and the water storage mechanism, and filtering materials are set in the drainage ditches. After the drainage mechanism and the drainage ditch are set in the construction trench 11, fill the backfill soil 14 and tamp it to complete the overall installation.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-clogging foundation pit waterproof structure, comprising a retaining structure (9), a construction trench (11), a waterproofing membrane (4) and a main structure which are sequentially arranged on a fine stone concrete cushion layer (5) in the foundation pit from outside to inside, characterized in that: The waterproof coiled material (4) is laid on the outside of the main structure, a water storage mechanism is arranged in the waterproof coiled material (4) at the bottom of the main structure, a drainage mechanism is installed at the bottom of the construction trench (11), and then backfill soil (14) is filled, the water storage mechanism and the drainage mechanism are connected, and impurity filtering mechanisms are arranged on the water storage mechanism and the drainage mechanism.

2. The anti-clogging foundation pit waterproof structure according to claim 1, characterized in that: The main structure comprises a side wall (12), and a foundation pit top plate (15), a basement floor plate (13) and a foundation pit floor plate (2) which are sequentially connected to the side wall (12) from top to bottom. A construction groove (11) is arranged on the outer side of the side wall (12) and the foundation pit floor plate (2). A waterproof roll (4) is connected to the outer side of the side wall (12) and the foundation pit floor plate (2) through the construction groove (11). A water storage mechanism is arranged in the waterproof roll (4) at the bottom of the foundation pit floor plate (2).

3. The anti-clogging foundation pit waterproof structure according to claim 2, characterized in that: The water storage mechanism comprises a plurality of reinforcing column holes (3) arranged in an equidistant array in a waterproof roll material (4) at the bottom of a foundation pit floor (2); the reinforcing column holes (3) are connected by partitions (16) to form a plurality of water storage chambers (1); and the reinforcing column holes (3) are filled with rubber columns (17).

4. The anti-clogging foundation pit waterproof structure according to claim 3, characterized in that: A gap is left between the partition plate (16) and the waterproof coiled material (4) at the bottom of the reinforcing column hole (3).

5. The anti-clogging foundation pit waterproof structure according to claim 4, characterized in that: The drainage mechanism comprises a water outlet pipe (8) arranged at the bottom of the construction trench (11), and the water storage chamber (1) near the water outlet pipe (8) is connected to the water outlet pipe (8) via an overflow pipe (6).

6. The anti-clogging foundation pit waterproof structure according to claim 5, characterized in that: The impurity filtering mechanism comprises a drainage ditch arranged on the foundation pit bottom plate (2) and in the construction trench (11), wherein the drainage ditch is sequentially provided with a coarse sand filter layer (7), a fine sand filter layer (701), a filter plate (702) and a bucket-shaped drainage channel (703) from top to bottom, the bucket-shaped drainage channel (703) on the foundation pit bottom plate (2) is connected to the water storage chamber (1), and the bucket-shaped drainage channel (703) between the water outlet pipe (8) and the backfill soil (14) is connected to the water outlet pipe (8); and the drainage ditch in the construction trench (11) is located between the water outlet pipe (8) and the backfill soil (14).

7. The anti-clogging foundation pit waterproof structure according to claim 6, characterized in that: The waterproof coiled material (4) is a self-adhesive waterproof coiled material, and an EVA hot-melt adhesive film is arranged on the surface of the self-adhesive waterproof coiled material.

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