Water collecting and draining structure for building construction

Abstract

The utility model relates to the technical field of building construction, in particular to a building construction water collection and drainage structure which comprises a drainage ditch, a gravel blind ditch and a sedimentation tank. The drainage ditches are annularly distributed in a circle along the top of the excavated foundation pit, the gravel blind ditches are arranged in a circle along the wall protection face of the bottom of the excavated foundation pit, and the water collecting wells are arranged at certain intervals. Water in the drainage ditch and the gravel blind ditch flows into the water collecting well; a submersible pump is arranged in each water collecting well, and water is pumped into the sedimentation tank; and the water in the sedimentation tank is precipitated and then pumped to a municipal sewage inspection well. In the foundation pit excavated on the construction site, the drainage ditch is arranged at the top of the pit, the gravel blind ditch is arranged at the bottom of the pit, and the plurality of water-collecting wells are matched for water collection and drainage; the drainage ditch serves as a water retaining dam, accumulated water at the top of the foundation pit is guided into the water collecting well and pumped into the sedimentation tank through the submersible pump arranged in the water collecting well, and the accumulated water is discharged after sedimentation reaches the standard; silt blockage is avoided, and the drainage efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to a water collection and drainage structure for building construction. Background Art

[0002] During the construction process, especially in the pile foundation and base construction stage, foundation pits need to be excavated. In the case of heavy rainfall in the rainy season, water is easily accumulated in the foundation pit, affecting construction safety and quality. Therefore, water collection and drainage are particularly important. In the prior art, the natural terrain of the construction site is generally used for natural drainage, and drainage ditches are excavated on the basis of natural drainage for auxiliary drainage. However, this method still has the problem of poor drainage when facing moderate or heavy rain with heavy rainfall, and the soil at the construction site is easy to enter the drainage ditch and cause blockage. Utility Model Content

[0003] The utility model aims to solve the problems existing in the background technology and proposes a water collection and drainage structure for construction, which optimizes the structure of the drainage ditch so that it can store water and drain water in a short time and improve the drainage effect.

[0004] The technical solution of the utility model is a water collection and drainage structure for construction, comprising a drainage ditch arranged along the top of a foundation pit, a gravel blind ditch arranged along the bottom of the foundation pit, and a sedimentation tank;

[0005] The drainage ditch is set in a circular shape along the top of the excavated foundation pit, and a water collection well is set at a certain interval;

[0006] A C20 concrete cushion layer is poured at the bottom of the drainage ditch, and a brick side wall is built on the side; a uniform cement mortar layer is applied to the inner side of the drainage ditch and the top of the brick side wall; the longitudinal slope of the drainage ditch is set at 1‰ to 2‰, and the water in the drainage ditch flows to the water collection well;

[0007] Gravel blind ditch is set along the retaining wall surface at the bottom of the excavated foundation pit, and a water collection well is set at a certain distance; the particle size of gravel in the gravel blind ditch is 20-50mm; the water in the gravel blind ditch flows into the water collection well;

[0008] The water collection well is filled with a gravel cushion layer; each water collection well is equipped with a submersible pump to pump water into the sedimentation tank; the water in the sedimentation tank is pumped to the municipal sewage inspection well after sedimentation.

[0009] Preferably, the C20 concrete cushion layer at the bottom of the drainage ditch is set to be 100 mm thick, the brick side wall is 240 mm thick and wide, and the cement mortar layer is a 20 mm thick 1:2 cement mortar.

[0010] Preferably, a water collection well is set up every 30-40m.

[0011] Preferably, the diameter of the water collection well is 0.8 m and the depth is not less than 2 m; and the bottom of the water collection well is at least 0.5 m lower than the bottom of the drainage ditch or gravel blind ditch.

[0012] Preferably, the ground surface of the drainage ditch and the gravel blind ditch is 0.3-0.4m lower than the excavation surface.

[0013] Preferably, the crushed stone particle size selected for the crushed stone cushion layer in the water collection well is 20-50 mm, and the thickness of the crushed stone cushion layer is not less than 400 mm.

[0014] Preferably, multiple sedimentation tanks are arranged on the top of the foundation pit, and are all arranged close to the municipal sewage inspection well; the water collection well pumps water to the nearest sedimentation tank.

[0015] Preferably, the sedimentation tank is a five-stage sedimentation tank.

[0016] Preferably, a 7.5kw submersible pump is selected and a 50 / 100mm water hose is used in conjunction with the submersible pump.

[0017] Compared with the prior art, the utility model has the following beneficial technical effects:

[0018] In the utility model, at the foundation pit excavated at the construction site, a drainage ditch is arranged on the top of the pit, and a gravel blind ditch is arranged at the bottom of the pit to cooperate with a plurality of water collection wells for water collection and drainage. The drainage ditch acts as a retaining dam to guide the accumulated water on the top of the foundation pit into the water collection well, and is pumped out to the sedimentation tank by a submersible pump arranged in the water collection well, and is discharged after the sedimentation meets the standards. At the bottom of the foundation pit, water is guided through the gravel blind ditch, and rainwater on the slope of the foundation pit and at the bottom of the pit will flow into the gravel blind ditch, and will flow into the water collection well after being filtered through the gravel. It is pumped out to the sedimentation tank by a submersible pump arranged in the water collection well, and is discharged after the sedimentation meets the standards. This avoids silt blockage and improves drainage efficiency.

[0019] In the utility model, the longitudinal slopes of the drainage ditch and the gravel blind ditch are both set at 1‰ to 2‰. The water in the drainage ditch flows to the water collection well, and the water collection well pumps the water to the nearest sedimentation tank for convenient and rapid discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the cross-sectional structure of the drainage ditch in the embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the gravel blind ditch in the embodiment of the utility model;

[0022] Figure 3 It is a schematic diagram of the structure of the water collection well in the embodiment of the utility model;

[0023] Figure 4 This is a schematic diagram of the planar structure of the water collection well in the embodiment of the utility model;

[0024] Figure 5 It is a schematic diagram of the planar structure of the sedimentation tank in the embodiment of the utility model.

[0025] Figure numerals: 1. drainage ditch; 12. concrete cushion layer; 13. brick side wall; 14. cement mortar layer; 2. gravel blind ditch; 3. sedimentation tank; 4. collection well; 41. gravel cushion layer. DETAILED DESCRIPTION

[0026] Example 1

[0027] The utility model provides a water collection and drainage structure for construction, comprising a drainage ditch 1 arranged along the top of a foundation pit, a gravel blind ditch 2 arranged along the bottom of the foundation pit, and a sedimentation tank 3;

[0028] The sedimentation tank 3 and the drainage ditch 1 are both arranged at the top of the foundation pit; the drainage ditch 1 is arranged in a circle along the top of the excavated foundation pit, and a water collection well 4 is arranged every 30-40m;

[0029] like Figure 1 As shown, a C20 concrete cushion layer 12 is poured at the bottom of the drainage ditch 1, and a brick side wall 13 is built on the side; a uniform cement mortar layer 14 is applied to the inner side of the drainage ditch 1 and the top of the brick side wall 13; the longitudinal slope of the drainage ditch 1 is set at 1‰ to 2‰, and the water in the drainage ditch 1 flows to the water collection well 4; the C20 concrete cushion layer 12 at the bottom of the drainage ditch 1 is set to be 100mm thick, the brick side wall 13 is 240mm thick and wide, and the cement mortar layer 14 is a 20mm thick 1:2 cement mortar;

[0030] In this embodiment, C20 concrete is easy to mix, construct and maintain, and the constructed concrete cushion layer 12 has good supporting performance, ensuring the supporting performance of the drainage ditch 1; the thickness of the brick side wall 13 is 240 mm wide, which ensures the lateral supporting capacity of the drainage ditch; in addition, the cement mortar layer 14 can cover the inner side of the drainage ditch 1 and the top of the brick side wall 13 to prevent leakage.

[0031] like Figure 2 As shown, a gravel blind ditch 2 is arranged along the retaining wall surface at the bottom of the excavated foundation pit, and a water collection well 4 is arranged at a certain distance; the gravel particle size in the gravel blind ditch 2 is 20-50mm; the water in the gravel blind ditch 2 flows into the water collection well 4; the basic structure of the gravel blind ditch 2 is the same as that of the drainage ditch 1, only the gravel with a particle size of 20-50mm is filled in the ditch to filter the silt in the water, so that the water flow can flow into the water collection well 4 to prevent the silt from clogging the submersible pump. In this embodiment, the ground of the drainage ditch 1 and the gravel blind ditch 2 is 0.3-0.4m lower than the excavation surface; so that the rainwater at the top of the foundation pit can enter the drainage ditch 1 under the action of gravity potential energy, and the rainwater at the bottom of the foundation pit can enter the gravel blind ditch 2 under the action of weight potential energy.

[0032] like Figure 3 As shown, in this embodiment, the water collection well 4 is filled with a crushed stone cushion layer 41; each water collection well 4 is provided with a submersible pump to pump water into the sedimentation tank 3; the water in the sedimentation tank 3 is pumped to the municipal sewage inspection well after sedimentation. The bottom of the water collection well 4 is provided with a C20 concrete cushion layer, which is the same as the drainage ditch 1, to play a supporting role at the bottom.

[0033] In this embodiment, the diameter of the water collection well 4 is 0.8m, the depth is not less than 2m, and the bottom of the water collection well 4 is at least 0.5m lower than the bottom of the drainage ditch 1 or the gravel blind ditch 2. This allows rainwater in the drainage ditch 1 and the gravel blind ditch 2 to flow smoothly into the water collection well 4, and the water collection well 4 can store more rainwater.

[0034] The crushed stone pad 41 in the water collection well 4 has a crushed stone particle size of 20-50 mm, and the thickness of the crushed stone pad 41 is not less than 400 mm. The crushed stone pad in the water collection well 4 can diffuse stress and drain water, and accelerate the consolidation and settlement of the lower soil layer.

[0035] In this embodiment, multiple sedimentation tanks 3 are arranged on the top of the foundation pit, and are all arranged close to the municipal sewage inspection well; Figure 4 The longitudinal slopes of the drainage ditch 1 and the gravel blind ditch 2 are both set at 1‰ to 2‰. The water in the drainage ditch 1 flows to the water collection well 4, and the water collection well 4 pumps the water to the nearest sedimentation tank 3.

[0036] like Figure 5 As shown, the sedimentation tank 3 is a five-stage sedimentation tank.

[0037] The submersible pump uses a 7.5kw submersible pump and is equipped with a 50 / 100mm water hose to quickly drain water.

[0038] In the utility model, at the foundation pit excavated at the construction site; a drainage ditch 1 is set on the top of the pit, and a gravel blind ditch 2 is set at the bottom of the pit to cooperate with multiple water collection wells 4 to collect and drain water; the drainage ditch 1 acts as a water retaining dam, and the accumulated water on the top of the foundation pit is guided into the water collection well 4, and pumped out to the sedimentation tank 3 through the submersible pump set in the water collection well 4, and discharged after the sedimentation reaches the standard;

[0039] At the bottom of the foundation pit, water is guided through a gravel blind ditch 2. Rainwater on the slope of the foundation pit and at the bottom of the pit will flow into the gravel blind ditch 2, and flow into the collection well 4 after being filtered through gravel; it is pumped out into the sedimentation tank 3 through a submersible pump installed in the collection well 4, and discharged after sedimentation meets the standards.

[0040] The implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A water collection and drainage structure for construction, characterized in that: It comprises a drainage ditch (1) arranged along the top of the foundation pit, a gravel blind ditch (2) arranged along the bottom of the foundation pit, and a sedimentation tank (3); The drainage ditch (1) is arranged in a circular shape along the top of the excavated foundation pit, and a water collection well (4) is arranged at a certain interval; A C20 concrete cushion layer (12) is poured at the bottom of the drainage ditch (1), and a brick side wall (13) is built on the side; a uniform cement mortar layer (14) is applied to the inner side of the drainage ditch (1) and the top of the brick side wall (13); the longitudinal slope of the drainage ditch (1) is set at 1‰ to 2‰, and the water in the drainage ditch (1) flows to the water collection well (4); A gravel blind ditch (2) is arranged along the retaining wall surface at the bottom of the excavated foundation pit, and a water collection well (4) is arranged at a certain interval; the gravel particle size in the gravel blind ditch (2) is 20-50 mm; the water in the gravel blind ditch (2) flows into the water collection well (4); The water collection well (4) is filled with a crushed stone cushion layer (41); each water collection well (4) is provided with a submersible pump to pump water into a sedimentation tank (3); the water in the sedimentation tank (3) is pumped to a municipal sewage inspection well after sedimentation.

2. A water collection and drainage structure for construction according to claim 1, characterized in that: The C20 concrete cushion layer (12) at the bottom of the drainage ditch (1) is set to be 100 mm thick, the brick side wall (13) is 240 mm thick and wide, and the cement mortar layer (14) is a 20 mm thick 1:2 cement mortar.

3. A water collection and drainage structure for construction according to claim 1 or 2, characterized in that: A water collection well (4) is set every 30-40m.

4. A water collection and drainage structure for construction according to claim 1, characterized in that: The diameter of the water collection well (4) is 0.8 m and the depth is not less than 2 m; and the bottom of the water collection well (4) is at least 0.5 m lower than the bottom of the drainage ditch (1) or the gravel blind ditch (2).

5. A water collection and drainage structure for construction according to claim 1, characterized in that: The ground surfaces of the drainage ditch (1) and the gravel blind ditch (2) are 0.3-0.4m lower than the excavation surface.

6. A water collection and drainage structure for construction according to claim 1, characterized in that: The crushed stone layer (41) in the water collection well (4) has a crushed stone particle size of 20-50 mm, and the thickness of the crushed stone layer (41) is not less than 400 mm.

7. A water collection and drainage structure for construction according to claim 1, characterized in that: A plurality of sedimentation tanks (3) are arranged on the top of the foundation pit and are all arranged close to the municipal sewage inspection well; the water collection well (4) pumps water to the nearest sedimentation tank (3).

8. A water collection and drainage structure for construction according to claim 7, characterized in that: The sedimentation tank (3) is a five-stage sedimentation tank.

9. A water collection and drainage structure for construction according to claim 1, characterized in that: The submersible pump is a 7.5kw submersible pump and is equipped with a 50 / 100mm water hose.

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