CN203174616U - Clay foundation rain falling and water saving system - Google Patents

Abstract

The utility model discloses a clay foundation rain falling and water saving system. The clay foundation rain falling and water saving system is distributed in a clay foundation range and comprises blind ditches, water collecting wells and recycle settling ponds, wherein the recycle settling ponds are connected with the water collecting wells, the blind ditches are respectively arranged at the bottom lower sides of plan-to-cast ground beams in a horizontal direction and a vertical direction, the water collecting wells are sequentially arranged beside foundation platforms above junction positions of each blind ditch, a mesh-shaped water drainage structure is formed as the water collecting wells are communicated with the blind ditches through communication ditches, the water collecting wells are internally and intermediately provided with corrugated pipes which are as high as the well walls of the water collecting wells in the vertical direction, the corrugated pipes are internally provided with rain falling guide pipes which are higher than the well walls of the water collecting wells, the rain falling guide pipes are internally provided with water pumps, the water pumps are connected with water collecting pipelines, and the water collecting pipelines stretch out of the well walls of the water collecting wells and are communicated with the recycle settling ponds. According to the clay foundation rain falling and water saving system disclosed by the utility model, the technical problem that rain falling cannot effectively be carried out or rain falling amount is too much under a clay foundation environment in an existing rain falling scheme, and thus underground water is wasted is solved.

Description

A Clay Foundation Precipitation and Water Saving System

technical field

The utility model relates to a set of foundation precipitation and water-saving system, in particular to a precipitation and water-saving system for clay foundation.

Background technique

For a long time, in order to avoid a large amount of surface and groundwater intrusion, causing foundation immersion or problems such as piping, quicksand, pit bottom uplift, and stratum deformation outside the pit, before the construction of the basement of high-rise buildings, the known dewatering scheme is to use well point dewatering. However, for foundation pits where the foundation soil layer is clay, due to the low permeability of clay, in order to achieve the purpose of precipitation, it is often necessary to intensify the arrangement of well points and increase the length of well points, resulting in the extraction of a large amount of groundwater and the waste of groundwater resources. In order to save water resources, the Ministry of Construction promulgated the "Green Construction Guidelines", which requires that groundwater should be pumped as little as possible for foundation pit precipitation. Groundwater is polluted.

Utility model content

The purpose of the utility model is to provide a clay foundation precipitation and water-saving system, which solves the technical problem that the existing precipitation scheme cannot effectively reduce water or the precipitation is too much in the clay foundation environment, resulting in insufficient groundwater waste.

In order to achieve the above object, the utility model adopts the following technical solutions:

A clay foundation dewatering and water saving system, distributed within the range of clay foundations, including culverts, water collection wells and recovery sedimentation tanks connected to the water collection wells, the section of the culverts is rectangular, respectively set in the horizontal and vertical directions to be poured On the lower side of the bottom of the ground beam, the width of the underground ditch is not greater than the width of the ground beam to be poured, and the water collection wells are arranged at intervals next to the foundation cap above the intersection of each underground ditch, and the water collection wells are connected with the underground ditch through the connecting ditch Form a network drainage structure, the elevation of the bottom of the connecting ditch is the same as that of the underground ditch, the inside of the underground ditch and the connecting ditch are all filled with gravel, and the top surfaces of the underground ditch, the connecting ditch and the water collection well are all paved There is a film isolation layer, a base cushion is poured on the film isolation layer of the communicating ditch and the water collection well, a ground beam cushion is poured on the film isolation layer of the dark ditch, and a ground beam is built on the ground beam cushion A brick tire mold, the brick tire mold is poured with a foundation cushion,

A corrugated pipe with the same height as the well wall of the water collection well is vertically placed in the center of the well of the water collection well, and the outside of the pipe wall of the bellows is also wrapped with a filter screen, and the surrounding of the pipe wall of the bellows and the range of the water collection well are filled with gravel, the pipe of the bellows is provided with a precipitation conduit higher than the well wall of the water collection well, and the part of the pipe wall of the bellows and the precipitation conduit below the foundation cushion is drilled with a quincunx-shaped flower eye. The gaps between the conduits are filled with a sealing layer, and a water pump is placed in the dewatering conduit, and the water pump is connected to a water collection pipeline, and the water collection pipeline extends out of the well wall of the water collection well and is connected to a recovery sedimentation tank.

The outer side of the pipe wall of the downfall conduit is located within the scope of the foundation cushion and is radially welded with a circle of L-shaped positioning reinforcement along the circumferential direction. The vertical side of the positioning reinforcement is vertical and close to the pipe wall of the downfall conduit, and the horizontal edge into the base layer.

The downfall conduit is made of steel pipe with a diameter not less than 230mm.

The positioning steel bars are welded at least three along the circumferential direction.

The outer side of the pipe wall of the dewatering conduit is located within the scope of the foundation floor, and along the length direction of the pipe wall, there are two rings of hydrostop rings welded up and down, which are the upper hydrofoil ring and the lower hydrofoil ring respectively.

An additional waterproof layer is provided at the inner corner between the downfall conduit and the concrete of the foundation cushion.

A waterproof layer is laid on the base cushion, a concrete waterproof protective layer is laid on the waterproof layer, and a foundation base plate is poured on the waterproof protective layer.

The top elevation of the downfall conduit is at least 50mm lower than the top elevation of the foundation floor.

The bottom elevation of the water collection well is at least 500mm deeper than the bottom elevation of the dark ditch.

The mesh size of the filter is 60-80 mesh.

Compared with the prior art, the utility model has the following characteristics and beneficial effects:

The utility model provides a dewatering and water-saving system. The system can not only effectively lower the groundwater level so that it can be controlled at a predetermined elevation, but also has the effects of simple construction, low cost and short construction period. Compared with the traditional method of dewatering first and then excavating In the construction sequence, the precipitation is carried out after the earth excavation is completed, and the precipitation does not affect the construction of the foundation floor at the same time, thereby shortening the construction period.

The utility model uses earthwork excavation machinery to complete the construction of the water collection well, which saves the process of mechanical drilling and setting well point pipes before earthwork excavation compared with the traditional technology, thereby saving costs.

In the utility model, the underground ditch, the connecting ditch, and the water collecting well arranged beside the intersection of the underground ditch are arranged at the bottom of the ground beam, so that the groundwater forms a continuous network, thereby avoiding the risk of local groundwater encroaching on the foundation due to geological unevenness.

The utility model improves the dewatering efficiency of the clay foundation due to the combination of the culvert and the water collection well, thereby avoiding drilling deep wells while reducing the surface groundwater and extracting deep groundwater, reducing the extraction of groundwater, reducing the loss of groundwater, and saving water resources , conducive to energy saving and environmental protection. At the same time, the extracted groundwater can be recycled and used for washing vehicles, concrete maintenance, and dust reduction on the site after precipitation, which improves the utilization rate of non-traditional water sources.

In the utility model, positioning steel bars are pre-welded on the pipe wall of the downwater conduit, so that the conduit is fixed within the scope of the foundation cushion, and the upper and lower water stop rings can block the seepage water under the foundation floor, and the additional waterproof layer is set Both enhance the waterproof ability of the structure and lay a solid foundation for the future construction process.

The utility model can be widely used in clay foundation precipitation construction. the

Description of drawings

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Fig. 1 is the schematic diagram of the plane layout of the gutter at the bottom of the beam and the water collecting well of the utility model.

Fig. 2 is a structural schematic diagram of section A-A in Fig. 1 .

Fig. 3 is a structural schematic diagram of the welded positioning steel bars and the upper and lower hydrostop rings on the outer side of the downwater conduit wall in Fig. 2 .

FIG. 4 is a top view structural diagram of FIG. 3 .

Fig. 5 is a schematic diagram of the structure of the downwater conduit plugging.

Reference signs: 1-beam to be poured, 2-underground ditch, 3-connecting ditch, 4-collection well, 5-foundation cap, 6-gravel, 7-membrane isolation layer, 8-bellows, 9-water pump, 10 - foundation cushion, 11 - brick tire mold, 12 - positioning steel bar, 13 - lower hydrofoil ring, 14 - upper hydrofoil ring, 15 - precipitation conduit, 16 - sealing layer, 17 - medium coarse sand, 18 - waterproof layer, 19 - waterproof protective layer, 20 - base plate, 21 - plugging agent, 22 - micro-expansion concrete, 23 - steel cover plate, 24 - water collection pipeline, 25 - recovery sedimentation tank, 26 - ground beam pad layer.

Detailed ways

Referring to the embodiment shown in Figures 1-4, a clay foundation dewatering and water-saving system is distributed within the scope of the clay foundation and includes a culvert 2, a water collection well 4 and a recovery sedimentation tank 25 connected to the water collection well 4. The section of the culvert 2 is They are rectangular, and are respectively arranged on the lower side of the bottom of the ground beam 1 to be poured in the horizontal and vertical directions. The width of the underground ditch 2 is not greater than the width of the ground beam 1 to be poured. Next to the foundation cap 5 above the intersection of the underground ditch 2, the water collection well 4 is connected to the underground ditch 2 to form a network drainage structure through the communication ditch 3, and the elevation of the bottom of the communication ditch 3 is the same as that of the underground ditch 2. Both the underground ditch 2 and the communication ditch 3 are filled with gravel 6, and the top surfaces of the underground ditch 2, the communication ditch 3 and the water collection well 4 are all laid with a film isolation layer 7, and the film isolation of the communication ditch 3 and the water collection well 4 Layer 7 is poured with a base cushion 10, and the film isolation layer 7 of the underground ditch 2 is poured with a ground beam cushion 26, and the ground beam cushion (26 is built with a brick tire mold 11 of a ground beam, and the brick The base cushion 10 is poured on the tire mold 11, and the size of the film isolation layer 7 should meet the requirement that the size of each side exceeds the section size of the dark ditch, the communication ditch and the water collection well, and the average length of each side is 150mm.

The bellows 8 with the same height as the well wall of the water collection well is placed vertically in the center of the well of the water collection well 4, and the outside of the pipe wall of the bellows 8 is also wrapped with a filter screen. Around the pipe wall of the bellows 8, the water collection well The range is filled with gravel 6, and the pipe of the bellows 8 is provided with a downwater conduit 15 that is higher than the well wall of the water collection well. , the gap between the bellows 8 and the downwater conduit 15 is filled with a sealing layer 16, and a water pump 9 is placed in the downwater conduit 15, and the water pump 9 is connected to the water collection pipeline 24, and the water collection pipeline 24 extends Out of the well wall of the water collection well and connected to the recovery sedimentation tank 25.

The outside of the pipe wall of the downfall conduit 15 is located within the scope of the foundation cushion 10 and is radially welded with a circle of L-shaped positioning steel bars 12 along the circumferential direction. , the transverse edge horizontally extends into the base cushion 10.

The positioning steel bars 12 are at least three welded along the circumferential direction.

On the outer side of the pipe wall of the downwater conduit 15 , within the range of the base plate 20 , two circles of water stop rings are welded up and down along the length direction of the pipe wall, namely the upper water stop ring 13 and the lower water stop ring 14 .

A waterproof layer 18 is laid on the base cushion layer 10 , a concrete waterproof protective layer 19 is laid on the waterproof layer 18 , and a foundation base plate 20 is poured on the waterproof protective layer 19 .

An additional waterproof layer is provided at the inner corner between the downfall conduit 15 and the concrete of the foundation cushion 10 .

The top elevation of the downfall conduit 15 is at least 50 mm lower than the top elevation of the foundation floor 20 .

The bottom elevation of the water collection well 4 is at least 500mm deeper than the bottom elevation of the dark ditch 2 .

The mesh size of the filter is 60-80 mesh.

The construction method of the present embodiment is as follows:

Step 1: Referring to Figure 1, after the ground beam 1 and the foundation cap 5 are excavated to the base level, the underground ditch 2 is excavated at the bottom of the ground beam 1. The section of the underground ditch in the example is square, with a width of 300mm and a depth of 300mm; water collection wells 4 are arranged one by one next to the intersection point of the vertical and horizontal underground ditches. Base plate thickness + waterproof protective layer thickness + foundation cushion thickness + 300mm + 500mm, of which 300mm is the depth of the dark ditch, and the bottom elevation of the water collecting well 4 is 500mm deeper than the bottom elevation of the dark ditch 2; the dark ditch 2 and the water collecting well 4 pass through the connecting ditch 3 connected, the elevation of the bottom of the connected ditch is the same as that of the bottom of the dark ditch.

Step 2: As shown in Figure 2, gravel 6 is filled in the underground ditch 2, the connecting ditch 3 and the water collection well 4. The gravel should be well graded and backfilled densely. Place the bellows 8 vertically in the center of the water collection well 4, and the bellows 8 The elevation of the top is equal to the elevation of the foundation cushion concrete, and the corrugated pipe 8 is wrapped with a dense mesh filter; the water pump 9 is placed in the corrugated pipe 8 for dewatering, and the groundwater is transported to the recovery sedimentation tank 25 through the water collection pipeline 24, and the water in the sedimentation tank is recovered The groundwater is recycled after tertiary sedimentation.

Step 3: After the preliminary precipitation is realized, a plastic film isolation layer 7 is laid above the dark ditch 2, the communication ditch 3 and the water collection well 4, and the foundation cushion 10 poured on the film isolation layer 7 of the communication ditch 3 and the water collection well 4, and the culvert The ground beam cushion 26 is poured on the film isolation layer 7 , the brick tire membrane 11 is built on the ground beam cushion 26 , and the foundation cushion 10 is poured on the brick mold 11 .

Step 4: Place a downwater conduit 12 with a diameter smaller than the bellows 8 in the bellows 8. The downwater conduit can be made of a steel pipe, directly not less than 230mm, and should be able to meet the requirements for placing a water pump therein; the design length of the downwater conduit 12 It is: the depth of the water collection well 4 + the thickness of the foundation cushion 10 + the thickness of the waterproof protective layer 19 + the thickness of the foundation floor 20 - 50mm, wherein 50mm means that the top elevation of the downfall conduit 15 is lower than the top elevation of the foundation bottom plate 20 by 50mm; The upper end of the gap between the corrugated pipes 8 is filled with a sealing layer 16. In this embodiment, the sealing layer 16 can be sealed and compacted by using the oil-filling paste of hemp silk. the

Step 5: As shown in Figure 2-4, the outside of the pipe wall of the downfall conduit 15 is located within the scope of the foundation cushion 10 and is radially welded with a circle of L-shaped positioning steel bars 12 along the circumferential direction, and the vertical sides of the positioning steel bars 12 are vertical And it is close to the pipe wall of the dewatering conduit 15, and the horizontal edge extends horizontally into the base cushion 10, and the vertical edge is close to the dewatering conduit in order to prevent the subsequent laying of the waterproof membrane from being unable to turn up; the outside of the pipe wall of the dewatering conduit 15, Located within the scope of the foundation floor 20, the upper and lower water stop rings 13 and 14 are respectively welded up and down along the length direction of the pipe wall. In this embodiment, the lower water stop ring is welded 100mm above the bottom elevation of the foundation floor 20 For the ring 13, the hydrostop ring 14 is welded at 100 mm below the elevation of the top of the base plate 20, and the inside of the inner ring of the hydrostop ring is fully welded to the outside of the pipe wall.

Step 6: Referring to Fig. 5, pour the foundation cushion 10, on the foundation cushion 10 successively waterproof layer 18, waterproof protective layer 19 and foundation floor 20, waterproof layer 18 turns up along the pipe wall of the downwater conduit 15, until the precipitation The duct 15 is sealed at a lower hydrofoil ring 13 arranged in the region of the foundation floor.

Step 7: Dewatering is carried out at the same time as Step 6. After the building load reaches the design requirements, stop the dewatering; take out the water pump 9 from the dewatering conduit, fill the medium coarse sand 17 in the dewatering conduit 12 to the level of the foundation cushion 10, and then plug the Wet the leakage agent 21 with water, knead it into a cake shape, press it on the medium-coarse sand layer 17 in the downfall conduit, and then pour micro-expansion concrete 22 with a strength level higher than that of the foundation floor in the downfall conduit 12 to the top level of the downfall conduit 15 . After the top of the downfall conduit 12 is sealed with a welded steel cover plate 23, the steel cover plate 23 is poured with micro-expansion concrete 22 with a strength level higher than that of the base plate to be level with the top level of the base plate 20, thereby completing well sealing.

Claims (10)

1. clay foundation precipitation water-saving system, be distributed in the clay foundation scope, it is characterized in that: comprise covered conduit (2), collecting well (4) and the recovery sedimentation basin (25) that links to each other with collecting well (4), described covered conduit (2) cross section is rectangle, be separately positioned on horizontal stroke, intend building the bottom downside of grade beam (1) on the vertical both direction, the width of described covered conduit (2) is not more than the width of intending building grade beam (1), described collecting well (4) is disposed on the next door of the foundation platform (5) of each covered conduit (2) intersection top successively, collecting well (4) is communicated with covered conduit (2) and reticulates discharge structure by being communicated with ditch (3), the bottom of trench absolute altitude of described connection ditch (3) is identical with the bottom of trench absolute altitude of covered conduit (2), all fill up gravel (6) in the ditch of described covered conduit (2) and connection ditch (3), described covered conduit (2), the top surface that is communicated with ditch (3) and collecting well (4) all is equipped with film separation layer (7), built foundation pad (10) on the film separation layer (7) of described connection ditch (3) and collecting well (4), built grade beam bed course (26) on the film separation layer (7) of described covered conduit (2), build the brick loose tool (11) of grade beam on the described grade beam bed course (26) by laying bricks or stones, built foundation pad (10) on the described brick loose tool (11)

Vertically be placed with the collecting well borehole wall with high bellows (8) between two parties in the well of described collecting well (4), the tube wall outside of described bellows (8) has also swathed screen pack, around the tube wall of bellows (8), fill up gravel (6) in the collecting well scope, be provided with the precipitation conduit (15) that exceeds the collecting well borehole wall in the pipe of described bellows (8), the tube wall of described bellows and precipitation conduit is positioned at the following part of foundation pad and all is drilled with quincunx presbyopia, be filled with sealant (16) in the slit between described bellows (8) and the precipitation conduit (15), be placed with water pump (9) in the described precipitation conduit (15), described water pump (9) links to each other with the pipeline that catchments (24), and the described pipeline that catchments (24) stretches out the collecting well borehole wall and is communicated to and reclaims sedimentation basin (25).

2. a kind of clay foundation precipitation water-saving system according to claim 1 is characterized in that: described precipitation conduit (15) uses steel pipe manufacturing, and diameter is not less than 230mm.

3. a kind of clay foundation precipitation water-saving system according to claim 1, it is characterized in that: the tube wall of described precipitation conduit (15) outside, be positioned at foundation pad (10) scope, along the circumferential direction be radial and be welded with one and enclose L shaped spacer bars (12), the vertical edge of described spacer bars (12) is vertical and be close to the tube wall of precipitation conduit (15), and the horizontal edge level stretches in the foundation pad (10).

4. a kind of clay foundation precipitation water-saving system according to claim 3, it is characterized in that: described spacer bars (12) along the circumferential direction welds 3 at least.

5. a kind of clay foundation precipitation water-saving system according to claim 1, it is characterized in that: the tube wall of described precipitation conduit (15) outside, be positioned at sole plate (20) scope, be welded with two and enclose sealing wing rings along the tube wall length direction is upper and lower, be respectively sealing wing ring (13) and following sealing wing ring (14).

6. a kind of clay foundation precipitation water-saving system according to claim 1; it is characterized in that: be equipped with waterproofing course (18) on the described foundation pad (10); be equipped with concrete fish tail and waterproof layer (19) on the described waterproofing course (18), built sole plate (20) on the described fish tail and waterproof layer (19).

7. a kind of clay foundation precipitation water-saving system according to claim 1, it is characterized in that: the inner corner trim place between the concrete of described precipitation conduit (15) and foundation pad (10) is provided with the waterproof extra play.

8. a kind of clay foundation precipitation water-saving system according to claim 1, it is characterized in that: the top mark height of described precipitation conduit (15) is lower than the high 50mm of top mark of sole plate (20) at least.

9. a kind of clay foundation precipitation water-saving system according to claim 1, it is characterized in that: the end absolute altitude of described collecting well (4) is deeper than the end absolute altitude 500mm of covered conduit (2) at least.

10. a kind of clay foundation precipitation water-saving system according to claim 1, it is characterized in that: the mesh size of described screen pack is 60～80 orders.

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