CN110080260B

CN110080260B - Drainage structures falls in foundation ditch

Info

Publication number: CN110080260B
Application number: CN201910239871.1A
Authority: CN
Inventors: 余温和; 何靓芳; 叶洋波; 程正贵
Original assignee: Zhejiang Lipeng Construction Co ltd
Current assignee: Zhejiang Lipeng Construction Co ltd
Priority date: 2019-03-27
Filing date: 2019-03-27
Publication date: 2020-12-22
Anticipated expiration: 2039-03-27
Also published as: CN110080260A

Abstract

The invention discloses a foundation pit drainage structure which is characterized by comprising a drainage ditch and a water collecting well which are arranged at the bottom of a foundation pit, a water suction pump and a water suction pipe, wherein a support pipe is arranged in the water collecting well, the support pipe is divided into a top pipe, a connecting pipe and a permeable pipe from top to bottom, the two sides of the top pipe, which face the drainage ditch, are respectively provided with a water inlet communicated with the drainage ditch, the outer wall of the permeable pipe is provided with a plurality of water inlet holes, the inner side of the permeable pipe is provided with a filter member made of a steel wire mesh, the filter member comprises a filter cylinder positioned in the middle, the outer side of the upper end of the filter cylinder is connected with a filter ring tightly attached to the inner wall of the permeable pipe, a filter material is filled between. Groundwater not only can be followed the socle portion infiltration cartridge filter of permeating water, can also permeate to the cartridge filter in from the pipe side of permeating water, and flow area increases, and then can improve catchment efficiency, helps realizing falling the drainage fast.

Description

Drainage structures falls in foundation ditch

Technical Field

The invention relates to the field of building construction, in particular to a foundation pit drainage structure.

Background

The foundation pit is a soil pit excavated at the design position of the foundation according to the elevation of the foundation and the plane size of the foundation. When the depth of the foundation pit is below the natural underground water level, underground water can continuously infiltrate into the pit. In order to ensure that the foundation pit can be constructed under a dry condition and prevent the problems of slope instability, foundation sand running, pit bottom uplift and the like, drainage work needs to be done. The existing foundation pit dewatering and drainage method comprises the following steps: open drain and water collecting well precipitation, light well point water purification, jet well point precipitation and the like, wherein the open drain and water collecting well precipitation method is the most common.

The water collecting well precipitation method comprises the following implementation processes: a water collecting well is arranged at the bottom of a foundation pit, drainage ditches are excavated along the periphery of the bottom of the foundation pit, after the water collecting well is excavated, materials such as cement pipes are used as a well wall supporting structure, and a plurality of layers of filtering materials such as gravels and pebbles are paved at the bottom of the pit so as to prevent muddy sand from being pumped out during water pumping and prevent soil at the bottom of the pit from being disturbed. The bottom of the water collecting well is lower than the bottom of the pit, so that water flows into the water collecting well under the action of gravity and is pumped out of the pit by a water pump.

The water collecting well dewatering method has the following technical defects: because the groundwater can only infiltrate from the bottom of the well, the infiltration water amount is limited, the drainage efficiency is affected, and constructors need to wait for a long time to control the closing of the pump machine so as to avoid the condition of dry burning the pump machine, and the improvement is needed.

Disclosure of Invention

Aiming at the technical defects, the invention aims to provide a foundation pit dewatering and drainage structure which can improve dewatering and drainage efficiency at the bottom of a foundation pit.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a drainage structures falls in foundation ditch, includes and sets up in escape canal, the sump pit of foundation ditch bottom, still includes suction pump, drinking-water pipe, be provided with a protection pipe in the sump pit, strut the pipe and divide from top to bottom to establish to push pipe, connecting pipe, the pipe of permeating water, the both sides in push pipe towards the escape canal all are provided with the water inlet with the escape canal intercommunication, permeate water the tub outer wall and seted up a plurality of inlet openings, permeate water tub inboard and be provided with the filter piece of being made by the wire net, filter the cartridge filter including being located the middle part, the cartridge filter upper end outside is connected with and permeates water the filter ring that tub inner wall hugs closely, filter and permeate water and fill between the pipe and have filtering material, it permeates water the non-woven fabrics to.

By adopting the technical scheme, the underground water can not only permeate into the filter cylinder from the bottom of the water permeable pipe, but also permeate into the filter cylinder from the side surface of the water permeable pipe, so that the flow area is increased, the water collection efficiency can be improved, and the quick water drainage is facilitated; the filtering piece is cylindrical and extends into the filtering material, so that the function of shaping the filtering material is achieved, the distance that underground water needs to flow through the filtering material is reduced, and the water seepage efficiency is improved; the support pipe is arranged in multiple sections, so that labor is saved during installation and disassembly, and meanwhile, filter materials are convenient to lay and install and filter.

The invention is further configured to: the inner wall of the water permeable pipe is connected with a water through pipe at the position of the water permeable hole, the outer wall of the water through pipe is provided with a plurality of water outlet holes, and one end of the water through pipe, which is obliquely arranged and is far away from the water inlet hole, is lower than the water inlet hole.

By adopting the technical scheme, the underground water firstly enters the water through pipe and then is discharged from the water outlet, so that the area of the filtering material which can be directly infiltrated by the underground water is increased, and the drainage efficiency is increased.

The invention is further configured to: the outer side of the water service pipe is wrapped with a water permeable non-woven fabric, the inner walls of openings at two ends of the water inlet are connected with fixing rings, and a steel wire ball is arranged between the fixing rings.

Through adopting above-mentioned technical scheme, non-woven fabrics and steel wire ball that permeate water all play and prevent that filtering material, sand and soil from getting into the water service pipe, and then avoid the trouble of water service pipe jam.

The invention is further configured to: the inner walls of the upper end and the lower end of the permeable pipe and the inner wall of the upper end of the connecting pipe are both connected with positioning rings, the inner walls of the lower ends of the connecting pipe and the jacking pipe are both connected with connecting rings, a plurality of fixing shafts are arranged on the upper sides of the positioning rings at intervals around the axial lead of the positioning rings, rotating cylinders are sleeved at the positions of the fixing shafts, one side of the upper ends of the rotating cylinders is connected with rotating blocks, and the connecting rings are provided with fixing holes.

By adopting the technical scheme, the connecting structures between the top pipe and the connecting pipe and between the connecting pipe and the permeable pipe are simple, the rotating cylinder is screwed until the rotating block is dislocated with the fixing hole, relative fixing can be completed, and the disassembly and the assembly are quick and convenient; the connecting structure is positioned on the inner wall, so that the disassembly and the assembly of the connecting structure cannot be influenced; the holding ring of the upside of the permeable pipe can also play a role in blocking the filter piece, so that the filter piece is stably shaped.

The invention is further configured to: the lower end of the permeable pipe is provided with a block net which is tightly attached to the upper side of the positioning ring and can be penetrated by the rotating cylinder and the rotating block.

By adopting the technical scheme, the blocking net is firstly placed in the water permeable pipe, then the filtering material is laid, and then the filtering piece is placed, so that the pre-installation and the post-installation can be realized, and the trouble of laying the filtering material at the bottom of the narrow water collecting well is avoided; when need backfill after the foundation ditch construction is accomplished, the pipe of permeating water can drive filtering material and take out together, realizes reuse, and reduce cost, the block receives the spacing of turning block fixed when taking out, and then can stabilize support filtering material, prevents that it from dropping.

The invention is further configured to: the water-permeable filter cloth is arranged between the connecting pipe and the water-permeable pipe, a limiting hole for the rotating cylinder and the rotating block to pass through is formed in the edge of the water-permeable filter cloth, and a water pumping hole for the water pumping pipe to pass through is formed in the middle of the water-permeable filter cloth.

Through adopting above-mentioned technical scheme, the water that flows into the sump pit from the escape canal is through the filter cloth that permeates water and fall into the cartridge filter, and then is taken away, and consequently the water taken away all receives better filtration adsorption treatment, and quality of water obtains improving, can directly be used for building site water resource to recycle the water economy resource.

The invention is further configured to: spacing hole and pumping hole all are provided with the design ring, the design ring is including fitting with a contraceptive ring and lower ring, one side of fitting with a contraceptive ring orientation lower ring is connected with a plurality of fixed pins, the lower ring be provided with fixed pin interference fit's pinhole.

Through adopting above-mentioned technical scheme, the design ring plays the design effect to the filter cloth that permeates water, prevents to take place to tear because of dragging, the trouble of quality problems such as deformation.

The invention is further configured to: close to the sizing ring the holding tank that holding ring and go-between were provided with the confession sizing ring card and go into.

Through adopting above-mentioned technical scheme, prevent to lead to the trouble in existence clearance between connecting pipe and the pipe of permeating water because of the existence of design ring.

The invention is further configured to: filter material including lay in the pipe bottommost cobble layer of permeating water, lay in the purification layer of cobble layer upside, purify the layer and include the raw materials of following parts by weight:

30-40 parts of activated carbon;

20-30 parts of fine river sand;

10-16 parts of diatomite;

30-50 parts of ceramsite filter material.

By adopting the technical scheme, the filtering material not only can prevent sandy soil from entering the filtering cylinder, but also can adsorb heavy metal and organic pollutants in underground water, thereby playing a role in purifying water quality; meanwhile, the filtering material has better water permeability, the flow speed of underground water is high, and the drainage speed is greatly improved.

In conclusion, the invention has the following beneficial effects:

1. the drift diameter of the underground water permeating into the water collecting well is increased, so that the water seepage efficiency is improved, and the drainage efficiency is improved;

2. the water flowing into the water collecting well is subjected to better filtering treatment, can be directly recycled, and saves water resources.

Drawings

FIG. 1 is a schematic structural diagram of the first embodiment;

FIG. 2 is an enlarged schematic view of area A of FIG. 1;

FIG. 3 is an enlarged schematic view of region B of FIG. 2;

fig. 4 is an enlarged schematic view of region C in fig. 2.

Description of reference numerals: 1. a drainage ditch; 2. a support tube; 21. jacking pipes; 211. a water inlet; 22. a connecting pipe; 23. a water permeable pipe; 231. a water inlet hole; 232. a fixing ring; 24. a water pipe; 241. a water outlet hole; 25. a connecting ring; 251. a fixing hole; 26. a positioning ring; 261. a fixed shaft; 262. a rotating cylinder; 263. rotating the block; 3. a water pump; 4. a water pumping pipe; 5. a filter member; 51. a filter cartridge; 52. a filter ring; 6. a filter material; 61. a pebble layer; 62. a purification layer; 7. water-permeable non-woven fabric; 8. a steel wire ball; 9. blocking; 10. water-permeable filter cloth; 101. a limiting hole; 102. a water pumping hole; 11. shaping rings; 111. ring fitting; 112. a lower ring; 1121. a pin hole; 113. a fixing pin; 12. accommodating grooves; 13. a water collecting well.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The first embodiment is as follows:

the utility model provides a drainage structures falls in foundation ditch, as shown in figure 1, still includes suction pump 3 including setting up in 1 escape canal of foundation ditch bottom periphery escape canal and along the sump pit 13 that 1 interval in escape canal set up, suction pump 3 is connected with the suction pipe 4 that stretches into sump pit 13 bottom. The bottom of the drainage ditch 1 is lower than the bottom of the foundation pit, and the bottom of the water collecting well 13 is lower than the bottom of the drainage ditch 1. Therefore, the underground water and the rainwater can flow into the drainage ditch 1, then flow into the water collecting well 13 and finally be pumped away by the water pump 3; the ground water can also be pumped away by directly penetrating from the bottom of the sump 13.

As shown in fig. 2, in order to prevent the problems of sand running and collapse of the wall of the water collecting well 13 caused by water penetration, the inner wall of the water collecting well 13 is closely attached with a supporting pipe 2 with the same length as the well depth. The supporting pipe 2 is divided into a top pipe 21, a connecting pipe 22 and a permeable pipe 23 from top to bottom in sequence, and the top pipe 21 is provided with water inlets 211 communicated with the bottom of the drainage ditch 1 towards both sides of the drainage ditch 1, so that water in the drainage ditch 1 can smoothly flow into the water collecting well 13 and cannot be blocked by the supporting pipe 2. The pipe 23 that permeates water inside is provided with the filtration piece 5 of making by the wire net, filter 5 and include the cartridge filter 51 with the coaxial setting of the pipe 23 that permeates water, and cartridge filter 51 upper end outer wall fixedly connected with crosses filter ring 52, crosses filter ring 52 and hugs closely with the pipe 23 inner wall that permeates water. The filtering material 6 is filled between the lower side of the filtering piece 5 and the permeable pipe 23, and the water pumping pipe 4 extends into the bottom of the filtering cylinder 51. The filtering piece 5 is cylindrical and extends into the filtering material 6, plays a role in shaping the filtering material 6, reduces the distance that underground water needs to flow through the filtering material 6, and further improves the water seepage efficiency. Be provided with the non-woven fabrics 7 that permeates water between filtering piece 5 and the filtering material 6, the non-woven fabrics 7 that permeate water can prevent that filtering material 6 from falling into cartridge filter 51 because of water infiltration, and then makes filtering material 6 can not be taken away by suction pump 3.

As shown in fig. 2, the filter material 6 includes a pebble layer 61 at the bottommost part of the water permeable pipe 23, and a purification layer 62 laid between the pebble layer 61 and the filter member 5. The pebble layer 61 is spaced from the bottom of the filter cartridge 51, so that the purification layer 62 is cylindrical and covers the outside of the filter element 5. The purification layer 62 comprises the following raw materials in parts by weight: 30 parts of activated carbon, 20 parts of fine river sand, 10 parts of diatomite and 30 parts of ceramsite filter material. The filtering material 6 can not only prevent sand from entering the filter cartridge 51, but also absorb heavy metals and organic pollutants in the underground water, thereby playing a role in purifying the water; meanwhile, the filtering material 6 has better water permeability, the flow speed of underground water is high, and the drainage speed is greatly improved.

As shown in fig. 2 and 3, a plurality of water inlets 231 are formed on the outer wall of the permeable pipe 23, and a water pipe 24 is fixedly connected to the inner wall of the permeable pipe 23 at the water inlets. The outer wall of the water service pipe 24 is provided with a plurality of water outlet holes 241, one end of the water service pipe 24, which is obliquely arranged and is far away from the water inlet hole 231, is lower than the water inlet hole 231, and the outer side of the water service pipe 24 is wrapped with the water-permeable non-woven fabric 7. Groundwater can flow to filtering material 6 department from apopore 241 department again in the pervious pipe 23 side infiltration limbers 24 of following, and flow area increases, and then can improve catchment efficiency, helps realizing falling the drainage fast. The equal fixedly connected with of inlet opening 231 both ends opening inner wall is fixed ring 232, has placed steel wire ball 8 between two fixed ring 232, and steel wire ball 8 receives blockking of fixed ring 232 and is difficult to fall out from inlet opening 231. The permeable non-woven fabric 7 and the steel wire ball 8 both prevent the filtering material 6 and sand from entering the water pipe 24, and further avoid the trouble of blocking the water pipe 24.

As shown in fig. 2 and 4, the inner walls of the upper and lower ends of the permeable pipe 23 and the inner wall of the upper end of the connecting pipe 22 are fixedly connected with positioning rings 26, and the inner walls of the lower ends of the connecting pipe 22 and the top pipe 21 are fixedly connected with connecting rings 25. The upper side of the positioning ring 26 is fixedly connected with a plurality of fixed shafts 261 at intervals around the axis line thereof, the fixed shafts 261 are rotatably sleeved with rotating cylinders 262, one side of the upper ends of the rotating cylinders 262 is fixedly connected with rotating blocks 263, and the connecting ring 25 is provided with fixing holes 251 through which the rotating cylinders 262 and the rotating blocks 263 pass. The supporting pipe 2 is arranged in multiple sections, the connection structure between the jacking pipe 21 and the connecting pipe 22 and between the connecting pipe 22 and the permeable pipe 23 is simple, the rotating cylinder 262 is screwed until the rotating block 263 and the fixing hole 251 are staggered, relative fixation can be completed, the dismounting is fast and convenient, and meanwhile, the laying of the filtering material 6 and the installation and filtration are convenient. The filtering ring 52 is closely attached to the lower side of the positioning ring 26 at the upper end of the permeable pipe 23, so that the positioning ring 26 at the upper side of the permeable pipe 23 can also play a role of blocking the filtering piece 5, so that the filtering piece 6 is stably shaped.

As shown in fig. 2 and 4, a barrier net 9 made of steel wire is provided at the lower end of the permeable pipe 23, and the barrier net 9 is closely attached to the upper side of the positioning ring 26 at the lower end of the permeable pipe 23 and can be penetrated by the rotary cylinder 262 and the rotary block 263. The rotating block 263 is offset from the fixing hole 251 and faces the inner wall of the permeable pipe 23, and the meshes of the blocking net 9 are smaller than the particle size of the pebbles in the pebble layer 61. When needing to backfill after the foundation ditch construction is accomplished, the pipe 23 of permeating water can drive filtering material 6 and take out together, realizes reuse, reduce cost, therefore the block net 9 receives the spacing of turning block 263 fixed when the pipe 23 of permeating water takes out, and then can stabilize and support filtering material 6, prevents that it from dropping.

As shown in fig. 2 and 4, a water-permeable filter cloth 10 is disposed between the connecting pipe 22 and the water-permeable pipe 23, a limiting hole 101 is disposed at the edge of the water-permeable filter cloth 10 for the rotating cylinder 262 and the rotating block 263 to pass through, and a water pumping hole 102 is disposed at the middle for the water pumping pipe 4 to pass through. The water flowing into the sump 13 from the drainage ditch 1 falls into the filter cartridge 51 through the water-permeable filter cloth 10 and is pumped away, so that the pumped water is subjected to better filtration and adsorption treatment, the water quality is improved, and the water can be directly used for site water resource recycling and water resource saving. The limiting hole 101 and the water pumping hole 102 are both provided with a sizing ring 11 made of hard materials, and the sizing ring 11 can be penetrated by the water pumping pipe 4 or the rotating cylinder 262 and the rotating block 263. The sizing ring 11 includes an upper ring 111 and a lower ring 112, one side of the upper ring 111 facing the lower ring 112 is fixedly connected with a plurality of fixing pins 113 arranged at intervals, and the lower ring 112 is provided with pin holes 1121 in interference fit with the fixing pins 113. The shaping ring 11 shapes the limiting hole 101 and the water pumping hole 102, and prevents quality problems such as tearing and deformation caused by pulling. The positioning ring 26 and the connecting ring 25 adjacent to the sizing ring 11 are provided with a receiving groove 12 for the sizing ring 11 to be inserted into, so as to prevent the trouble of a gap between the connecting pipe 22 and the water permeable pipe 23 caused by the presence of the sizing ring 11. When needed, the permeable filter cloth 10 can be additionally arranged between the top pipe 21 and the connecting pipe 22 to form a double-filter-cloth filtering system, so that the water purifying effect is improved.

The working process is as follows:

when the supporting pipe 2 is installed, the retaining net 9 is firstly pre-installed outside the pit until the retaining net 9 is placed at the bottom of the permeable pipe 23 to be closely attached to the upper side of the corresponding positioning ring 26, and the rotating cylinder 262 penetrates through the retaining net 9 and rotates the rotating block 263 to face the inner wall of the permeable pipe 23; then, the pebble layer 61 is paved on the upper side of the blocking net 9, the water permeable non-woven fabric 7 is sleeved on the outer side of the water pipe 24, the steel wire ball 8 is placed between the two fixing rings 232, and the water purification layer is paved on the pebble layer 61; then, paving the permeable non-woven fabric 7 on the upper side of the filter material 6, and placing the filter piece 5 for shaping; then, the permeable filter cloth 10 with the shaping ring 11, the connecting pipe 22 and the top pipe 21 are sequentially installed, and the rotating cylinder 262 is screwed until the rotating block 263 is dislocated with the fixing hole 251 to finish the fixation; finally, the support pipe 2 is placed in the water collecting well 13, and the pumping pipe 4 is extended into the filter cylinder 51.

Example two:

different from the first embodiment, the purification layer 62 comprises the following raw materials in parts by weight: 40 parts of active carbon, 30 parts of fine river sand, 16 parts of diatomite and 50 parts of ceramsite filter material.

Example three:

different from the first embodiment, the purification layer 62 comprises the following raw materials in parts by weight: 35 parts of activated carbon, 25 parts of fine river sand, 13 parts of diatomite and 40 parts of ceramsite filter material.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. The utility model provides a drainage structures falls in foundation ditch, includes drainage ditch (1), sump pit (13) that set up in the foundation ditch bottom, still includes suction pump (3), drinking-water pipe (4), its characterized in that: be provided with a protection pipe (2) in sump pit (13), a protection pipe (2) divide from top to bottom and establish to push pipe (21), connecting pipe (22), tub (23) of permeating water, push pipe (21) all are provided with water inlet (211) with escape canal (1) intercommunication towards the both sides in escape canal (1), tub (23) of permeating water outer wall has seted up a plurality of inlet openings (231), tub (23) inboard of permeating water is provided with filter (5) of being made by the wire net, filter (5) are including the cartridge filter (51) that is located the middle part, the filter (51) upper end outside is connected with and permeates water and filter ring (52) that tub (23) inner wall hugs closely, it has filter material (6) to fill between tub (23) of permeating water (5) and the tub (23), be provided with non-woven fabrics (7) that permeates water between filter (5) and filter (6), drinking-water pipe (4) stretch into cartridge filter (51, the utility model discloses a permeable pipe, including permeable pipe (23), water inlet hole (231), permeable pipe (23) inner wall, the one end that permeable pipe (24) inner wall was connected with water service pipe (24) in permeable hole department, water service pipe (24) outer wall is provided with a plurality of apopores (241), water service pipe (24) slope sets up and keeps away from inlet hole (231) is less than inlet hole (231), water service pipe (24) outside parcel has permeable nonwoven fabric (7), inlet hole (231) both ends opening inner wall all is connected with solid fixed ring (232), two gu be provided with steel wire ball.

2. A foundation pit dewatering and drainage structure as claimed in claim 1, wherein: the utility model discloses a pipe, including pipe (23) of permeating water, connecting pipe (22) upper end inner wall all are connected with holding ring (26), connecting pipe (22) and push pipe (21) lower extreme inner wall all are connected with go-between (25), holding ring (26) upside is provided with a plurality of fixed axles (261) around its axial lead interval, fixed axle (261) department cover has a rotation section of thick bamboo (262), rotation section of thick bamboo (262) upper end one side is connected with turning block (263), go-between (25) are provided with fixed orifices (251) that supply rotation section of thick bamboo (262), turning block (263) to pass.

3. A foundation pit dewatering and drainage structure as claimed in claim 2, wherein: the lower end of the permeable pipe (23) is provided with a blocking net (9), and the blocking net (9) is tightly attached to the upper side of the positioning ring (26) and can be penetrated by the rotating cylinder (262) and the rotating block (263).

4. A foundation pit dewatering and drainage structure as claimed in claim 2, wherein: be provided with filter cloth (10) that permeates water between connecting pipe (22) and the pipe (23) of permeating water, filter cloth (10) border department of permeating water is provided with spacing hole (101) that supply rotary cylinder (262) and turning block (263) to pass, and the middle part is provided with water pumping hole (102) that supply water pumping pipe (4) to pass.

5. A foundation pit dewatering and drainage structure as claimed in claim 4, wherein: spacing hole (101) and pumping hole (102) all are provided with and stereotype ring (11), it includes ring (111) and lower ring (112) to stereotype ring (11), ring (111) are gone up one side of ring (112) and are connected with a plurality of fixed pins (113) down towards, lower ring (112) are provided with pinhole (1121) with fixed pin (113) interference fit.

6. A foundation pit dewatering and drainage structure as claimed in claim 5, wherein: close to design ring (11) holding tank (12) that holding ring (26) and go-between (25) were provided with to supply to design ring (11) card to go into.

7. A foundation pit dewatering and drainage structure as claimed in claim 1, wherein: filter material (6) including laying in pipe (23) of permeating water bottommost cobble layer (61), lay in purification layer (62) of cobble layer (61) upside, purify layer (62) and include the raw materials of following parts by weight:

30-40 parts of activated carbon;

20-30 parts of fine river sand;

10-16 parts of diatomite;

30-50 parts of ceramsite filter material.