CN212801545U

CN212801545U - Deep foundation pit drainage structure

Info

Publication number: CN212801545U
Application number: CN202020905582.9U
Authority: CN
Inventors: 王岩峰; 李振; 乔浩; 董玉磊
Original assignee: Tianjin Construction Engineering Co Ltd of China Construction Eighth Engineering Division Co Ltd
Current assignee: Tianjin Construction Engineering Co Ltd of China Construction Eighth Engineering Division Co Ltd
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2021-03-26
Anticipated expiration: 2030-05-26

Abstract

The utility model provides a deep basal pit drainage structures, includes the foundation ditch, is equipped with a plurality of holes that leak on the rubber layer, and supreme pebble layer, No. two pebble layers and No. two filter layers of being equipped with are in proper order down followed to a filter layer top surface, and a filter mantle and mount pad fixed connection, No. two immersible pump overcoat have No. two filter mantles, strutting arrangement and the rubber layer fixed connection of drainage well inner wall. The utility model discloses a drainage well middle part is equipped with the support column, and the support column supports there is a filter layer, because a filter layer cuts off the effect, even constructor falls into in the drainage well, can not fall into the drainage well bottom yet to constructor's safety has been guaranteed. In addition, when heavy rain weather is met, the first submersible pump and the second submersible pump drain water simultaneously, the first submersible pump mainly drains groundwater infiltrated into the foundation pit, the second submersible pump mainly drains rainwater into the foundation pit, and the problems of sand flowing, slope instability or foundation bearing capacity reduction caused by the fact that water in the foundation pit cannot be drained timely are solved.

Description

Deep foundation pit drainage structure

Technical Field

The utility model relates to a building technical field especially relates to a deep basal pit drainage structures.

Background

With the rapid development of modern building industry, high-rise and super high-rise buildings are increasing day by day, and because the upper portion load is big, high-rise and super high-rise buildings mostly adopt compensatory foundation, generally set up the multilayer basement in order to be favorable to the stability of building, but this has led to the foundation buried depth big, and the foundation ditch is excavated deeply, especially when the higher region of groundwater level excavates the foundation ditch, soil body aquifer is cut off, and groundwater can constantly permeate the foundation ditch, causes the quicksand, side slope unstability or makes the foundation bearing capacity descend.

The well type drainage structure of the existing foundation pit is characterized in that a well mouth is directly formed in the bottom of the foundation pit, and the drainage structure easily enables construction workers to fall into the well to form potential safety hazards. In addition, when the rain weather is met, water outside the foundation pit flows into the foundation pit, the underground water can continuously seep into the foundation pit, and the water in the foundation pit is easy to accumulate and cannot be discharged in time, so that quicksand and side slope instability are caused or the bearing capacity of the foundation is reduced.

Disclosure of Invention

The utility model aims at solving the defects of the prior art and providing a deep foundation pit drainage structure.

The utility model discloses a realize above-mentioned purpose, adopt following technical scheme: a deep foundation pit drainage structure comprises a foundation pit, wherein a circular truncated cone-shaped drainage well is formed in the bottom of the foundation pit, a rubber layer is arranged on the inner wall of the drainage well, a plurality of water leakage holes are formed in the rubber layer, a plurality of support columns which are evenly distributed in the circumference and are horizontal are arranged in the middle of the drainage well, one end of each support column is inserted into the side wall of the foundation pit through the rubber layer, a first filter layer is arranged on the top surface of each support column, a first pebble layer, a second pebble layer and a second filter layer are sequentially arranged on the top surface of the first filter layer from bottom to top, an installation seat is arranged on the bottom surface of the drainage well, a first submersible pump is installed on the top surface of the installation seat, a first filter cover is sleeved outside the first submersible pump, the first filter cover is fixedly connected with the installation seat, a second filter cover is installed on the top surface of the second filter layer, the, the escape canal has been seted up at the foundation ditch top, and the foundation ditch top surface is equipped with horizontally drain main, and in drain main's one end stretched into the escape canal for the drainage, drain main's the other end and drain pipe intercommunication No. one, No. two drain pipes and drain main were close to the one end intercommunication of drain pipe No. one, and drain main is close to the one end in escape canal and is equipped with the ooff valve No. one, is equipped with a plurality of upper and lower range upon range of strutting arrangement in the drainage shaft, strutting arrangement and the rubber layer fixed connection of drain shaft inner wall.

The supporting device comprises a fixed outer ring, a fixed inner ring and a plurality of connecting rods, the fixed outer ring is fixedly connected with the rubber layer, the connecting rods are evenly distributed on the inner side of the fixed outer ring in the circumferential direction, and the two ends of each connecting rod are respectively connected with the fixed outer ring and the fixed inner ring.

The middle part of the main drainage pipe is communicated with a standby pipe, and a second switch valve is arranged on the standby pipe.

The first switch valve and the second switch valve are both solenoid valve switches.

The diameter of the pebbles in the first pebble layer is larger than that of the pebbles in the second pebble layer.

The number of the connecting rods is not less than 3.

The connecting rod is connected with a counterweight sandbag.

The utility model has the advantages that: the utility model discloses a drainage well middle part is equipped with the support column, and the support column supports there is a filter layer, because a filter layer cuts off the effect, even constructor falls into in the drainage well, can not fall into the drainage well bottom yet to constructor's safety has been guaranteed. In addition, when heavy rain weather is met, the first submersible pump and the second submersible pump drain water simultaneously, the first submersible pump mainly drains groundwater infiltrated into the foundation pit, the second submersible pump mainly drains rainwater into the foundation pit, and the problems of sand flowing, slope instability or foundation bearing capacity reduction caused by the fact that water in the foundation pit cannot be drained timely are solved.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged schematic view at A in FIG. 1;

FIG. 3 is a schematic structural view of the supporting device;

in the figure: 1, foundation pit; 2-a drainage well; 3-a rubber layer; 4-a support column; 5-a first filter layer; 6-a pebble layer; 7-pebble layer II; 8-second filter layer; 9-a mounting seat; 10-a submersible pump; 11-a filter cover; 12-a fixed seat; 13-submersible pump number two; 14-filter cover II; 15-first water drainage pipe; 16-second drain pipe; 17-a drainage ditch; 18-a main drain pipe; 19-a switch valve; 20-spare pipe; 21-second switch valve; 22-a support means; 23-a fixed outer ring; 24-a fixed inner ring; 25-a connecting rod;

the following detailed description will be made in conjunction with embodiments of the present invention with reference to the accompanying drawings.

Detailed Description

The invention will be further explained with reference to the following figures and examples:

as shown in fig. 1 to 3, a deep foundation pit drainage structure, including foundation pit 1, round platform shape drainage well 2 has been seted up to foundation pit 1 bottom, and drainage well 2 inner wall is equipped with rubber layer 3, is equipped with a plurality of holes that leak on rubber layer 3, and the groundwater of being convenient for infiltrates in foundation pit 1.

Drainage well 2 middle part is equipped with a plurality of circumference equipartitions and horizontally support column 4, the one end of support column 4 is inserted in the lateral wall of foundation ditch 1 through rubber layer 3, the degree of depth that support column 4 inserted the lateral wall of foundation ditch 1 is greater than 1 meter, support column 4 top surface is equipped with filter layer 5 No. one, supreme pebble layer 6 that is equipped with is in proper order down followed to filter layer 5 top surface, No. two pebble layers 7 and No. two filter layers 8, the pebble diameter in the pebble layer 6 is greater than the pebble diameter in No. two pebble layers 7, a pebble layer 6, No. two pebble layers 7 and No. two filter layers 8 are favorable to filtering the muddy silt of groundwater in the foundation.

2 bottom surfaces of drainage well are equipped with

mount pad

9, and 9 top surfaces of mount pad install a immersible pump 10, and a immersible pump 10 overcoat has a filter mantle 11, No. one filter mantle 11 and mount pad 9 fixed connection, and No. two 8 top surfaces of filter layer are equipped with fixing base 12, and No. two immersible pumps 13 are installed to fixing base 12 top surfaces, and No. two immersible pump 13 overcoat has No. two filter mantles 14, No. two filter mantles 14 and fixing base 12 fixed connection. No. 11 filter screen and No. two filter screen 14 can filter some silt of muddy in the groundwater, and then guarantee that No. 10 immersible pumps and No. two immersible pumps 13 normally work, have improved the life of No. 10 immersible pumps and No. two immersible pumps 13.

No. one immersible pump 10 and No. two immersible pump 13's outlet link respectively has a drain pipe 15 and No. two drain pipes 16, escape canal 17 has been seted up at 1 top of foundation ditch, 1 top surface of foundation ditch is equipped with horizontally drain main 18, drain main 18's one end stretches into in the escape canal 17, be used for the drainage, drain main 18's the other end and No. one drain pipe 15 intercommunication, No. two drain pipes 16 and drain main 18 are close to the one end intercommunication of a drain pipe 15, drain main 18 is close to the one end of escape canal 17 and is equipped with switch valve 19 No. one, drain main 18 middle part intercommunication has stand-by pipe 20, stand-by pipe 20 increases the drainage outlet's drainage sectional area, be equipped with switch valve 21 No. two on the stand-by pipe 20, switch valve 19 and switch valve 21.

Be equipped with a plurality of upper and lower range upon range of strutting arrangement 22 in the drainage well 2, strutting arrangement 22 and the 3 fixed connection on rubber layer of drainage well 2 inner walls, strutting arrangement 22 includes fixed outer loop 23, fixed inner ring 24 and a plurality of connecting rod 25, fixed

outer loop

23 and 3 fixed connection on rubber layer, the inboard at fixed outer loop 23 of a plurality of connecting rod 25 circumference equipartitions, and the both ends of connecting rod 25 are connected with fixed outer loop 23 and fixed inner ring 24 respectively, connecting rod 25's number is not less than 3, even there is the counter weight sand bag on the connecting rod 25, the gravity of strutting arrangement 22 can be increased to the counter weight sand bag, make strutting arrangement 22's fixed outer loop 23 laminate with 3 on rubber layer of drainage well 2 better, the holding power to drainage well 2 lateral walls has.

The utility model discloses the during operation, in the groundwater infiltration that has thoughtlessly silt arrived foundation ditch 1, groundwater flows in drainage well 2, flows in drainage well 2 shaft bottoms after filtering through No. two filter layers 8, No. two pebble layers 7, a pebble layer 6 and a filter layer 5 in proper order, filters through filter mantle 11 again, and a immersible pump 10 work is in the groundwater discharge escape canal 17 that will filter, when not raining, only immersible pump 10 work. The utility model discloses a 2 middle parts of drainage well are equipped with support column 4, and support column 4 supports there is a filter layer 5, because a filter layer 5 cuts off the effect, even constructor falls into drainage well 2 in, can not fall into drainage well 2 bottoms yet to constructor's safety has been guaranteed. In addition, when heavy rain weather is met, the first submersible pump 10 and the second submersible pump 13 drain water simultaneously, the first submersible pump 10 mainly drains underground water permeating into the foundation pit 1, the second submersible pump 13 mainly drains rainwater flowing into the foundation pit 1, and the problems of sand flowing, slope instability or foundation bearing capacity reduction caused by the fact that the water in the foundation pit 1 cannot be drained timely are solved.

The present invention has been described above with reference to the accompanying drawings, and it is obvious that the present invention is not limited by the above embodiments, and various improvements made by the method concept and technical solution of the present invention or directly applied to other occasions without improvement are all within the protection scope of the present invention.

Claims

1. A deep foundation pit drainage structure comprises a foundation pit (1) and is characterized in that a truncated cone-shaped drainage well (2) is arranged at the bottom of the foundation pit (1), a rubber layer (3) is arranged on the inner wall of the drainage well (2), a plurality of water leakage holes are formed in the rubber layer (3), a plurality of support columns (4) which are uniformly distributed and horizontally are circumferentially arranged are arranged in the middle of the drainage well (2), one ends of the support columns (4) are inserted into the side wall of the foundation pit (1) through the rubber layer (3), a first filter layer (5) is arranged on the top surface of each support column (4), a first pebble layer (6), a second pebble layer (7) and a second filter layer (8) are sequentially arranged on the top surface of the first filter layer (5) from bottom to top, an installation seat (9) is arranged on the bottom surface of the drainage well (2), a first submersible pump (10) is installed on the top surface of the installation seat (9), a first filter cover (, a fixing seat (12) is arranged on the top surface of the second filtering layer (8), a second submersible pump (13) is mounted on the top surface of the fixing seat (12), a second filter cover (14) is sleeved outside the second submersible pump (13), the second filter cover (14) is fixedly connected with the fixing seat (12), water outlets of the first submersible pump (10) and the second submersible pump (13) are respectively connected with a first drain pipe (15) and a second drain pipe (16), a drainage ditch (17) is formed in the top of the foundation pit (1), a horizontal main drain pipe (18) is arranged on the top surface of the foundation pit (1), one end of the main drain pipe (18) extends into the drainage ditch (17) and is used for draining water, the other end of the main drain pipe (18) is communicated with the first drain pipe (15), the second drain pipe (16) is communicated with one end, close to the first drain pipe (15), of the main drain pipe (18), one end, close to the drainage ditch (17), is provided, a plurality of vertically stacked supporting devices (22) are arranged in the drainage well (2), and the supporting devices (22) are fixedly connected with the rubber layer (3) on the inner wall of the drainage well (2).

2. The deep foundation pit drainage structure according to claim 1, wherein the supporting device (22) comprises a fixed outer ring (23), a fixed inner ring (24) and a plurality of connecting rods (25), the fixed outer ring (23) is fixedly connected with the rubber layer (3), the plurality of connecting rods (25) are uniformly distributed on the inner side of the fixed outer ring (23) in the circumferential direction, and two ends of each connecting rod (25) are respectively connected with the fixed outer ring (23) and the fixed inner ring (24).

3. The deep foundation pit drainage structure according to claim 1, wherein a spare pipe (20) is communicated with the middle part of the main drainage pipe (18), and a second switch valve (21) is arranged on the spare pipe (20).

4. The deep foundation pit drainage structure according to claim 3, wherein the first switching valve (19) and the second switching valve (21) are both solenoid valves.

5. The deep foundation pit drainage structure according to claim 1, wherein the diameter of the pebbles in the pebble layer one (6) is larger than that of the pebbles in the pebble layer two (7).

6. The deep foundation pit drainage structure according to claim 2, wherein the number of the connection rods (25) is not less than 3.

7. A deep foundation pit drainage structure according to claim 6, wherein a counterweight sandbag is connected to the connecting rod (25).