CN111321749B - Recyclable rapid dredging device for water leakage of foundation pit enclosure and construction method thereof - Google Patents
Recyclable rapid dredging device for water leakage of foundation pit enclosure and construction method thereof Download PDFInfo
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- CN111321749B CN111321749B CN202010148523.6A CN202010148523A CN111321749B CN 111321749 B CN111321749 B CN 111321749B CN 202010148523 A CN202010148523 A CN 202010148523A CN 111321749 B CN111321749 B CN 111321749B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 184
- 238000010276 construction Methods 0.000 title claims abstract description 29
- 239000002689 soil Substances 0.000 claims abstract description 11
- 239000004576 sand Substances 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 159
- 239000010959 steel Substances 0.000 claims description 159
- 239000002184 metal Substances 0.000 claims description 85
- 239000000463 material Substances 0.000 claims description 15
- 238000004140 cleaning Methods 0.000 claims description 12
- 239000004033 plastic Substances 0.000 claims description 9
- 238000004873 anchoring Methods 0.000 claims description 7
- 239000002002 slurry Substances 0.000 claims description 7
- 239000004568 cement Substances 0.000 claims description 5
- 238000005553 drilling Methods 0.000 claims description 5
- 238000004064 recycling Methods 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 230000002209 hydrophobic effect Effects 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 abstract description 4
- 230000006698 induction Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 8
- 239000012466 permeate Substances 0.000 description 7
- 239000000428 dust Substances 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 3
- 241000282461 Canis lupus Species 0.000 description 2
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Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
- E02D3/103—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains by installing wick drains or sand bags
Abstract
The invention discloses a recyclable rapid dredging device for water leakage of a foundation pit enclosure and a construction method thereof. The device systematically combines two treatment modes of dredging and blocking, quickly blocks a water leakage point, discharges underground water orderly and efficiently, reduces the water pressure of a soil body, can prevent the danger of piping and sand flowing, and solves the problem from the disaster source of water induction foundation pit water leakage.
Description
Technical Field
The invention belongs to the technical field of geotechnical engineering, and particularly relates to a recyclable rapid dredging device for water leakage of a foundation pit enclosure and a construction method thereof.
Background
During the foundation pit engineering construction in high water level areas, the foundation pit can leak water due to the change of hydrogeological conditions and the reason of construction cold joint, which brings inconvenience to later construction, delays construction period and easily causes safety accidents. In order to avoid foundation pit collapse caused by water leakage and ensure construction safety, a rapid and effective dredging method is very necessary.
The existing foundation pit water leakage treatment methods comprise a plugging water interception method and a drainage tube drainage method. The former mainly includes the following two measures: 1) reinforcing a waterproof curtain: and (4) plugging and reinforcing the outer side of the foundation pit enclosure body by adopting high-pressure jet grouting to form a second water-stopping barrier. The method has the advantages of large engineering quantity, high manufacturing cost and easy restriction of construction machinery by external factors. 2) Drilling and grouting: the method comprises the steps of mechanically drilling a hole at the water leakage position of a foundation pit, inserting a grouting pipe to prepare slurry on site, pumping the prepared slurry into a water leakage point by using a grouting pump, dispersing, emulsifying and foaming the slurry to form a consolidation body, and blocking the water leakage point. The slurry prepared by the method needs on-site preparation, has large fluidity and long solidification time, and is difficult to block water leakage points in a short time, so the problem cannot be solved radically and rapidly. The latter is to insert a drainage tube at the water leakage point of the foundation pit to lead the underground water to the open trench for discharge. The method causes water resource waste, and meanwhile, because the filtration treatment is not carried out, the fine particles in the soil body are taken away by the underground water, so that the soil layer is hollow, the foundation pit side slope collapse and the surface settlement outside the pit are caused, and the adjacent buildings are adversely affected.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a recyclable rapid dredging device for water leakage of a foundation pit enclosure and a construction method thereof, which are combined with dredging and blocking to rapidly and efficiently solve the problem of water leakage of the deep foundation pit enclosure.
In order to achieve the purpose, the invention adopts the following technical application:
the recyclable rapid dredging device for water leakage of the foundation pit enclosure comprises a cylindrical outer-side water-permeable steel pipe and an inner-side water-permeable steel pipe;
the front ends of the outer side permeable steel pipes and the inner side permeable steel pipes are open, the tail ends of the outer side permeable steel pipes and the inner side permeable steel pipes are closed, permeable holes are uniformly formed in the side walls of the outer side permeable steel pipes and the inner side permeable steel pipes, and the inner side permeable steel pipes are nested in the outer side permeable steel pipes; the outer part of the inner side permeable steel pipe is wrapped with a permeable cotton-flax material which is fixed on the inner side permeable steel pipe through a layer of metal woven mesh of the outer side wrapping hoop;
the water control valve is characterized in that a metal sheet ring is welded at the front end of the outer side water permeable steel pipe, a circular baffle is installed at the front end of the inner side water permeable steel pipe, the circular baffle is fixed on the metal sheet ring to seal the outer side water permeable steel pipe and the front end of the inner side water permeable steel pipe when the inner side water permeable steel pipe is nested in the outer side water permeable steel pipe, the inner side water permeable steel pipe and the outer side water permeable steel pipe form a sealed whole, the circular baffle is externally connected with a water outlet pipe communicated with an inner cavity of the inner side water permeable steel pipe, and a water control valve is installed on the water outlet pipe.
Furthermore, two metal guide rails I are symmetrically welded on the inner wall of the outer side water-permeable steel pipe, two corresponding metal guide rails II are welded on the outer wall of the inner side water-permeable steel pipe, the metal guide rails I and the metal guide rails II are linear guide rails which axially extend along the outer side water-permeable steel pipe and the inner side water-permeable steel pipe, the tops of the opposite metal guide rails I and the metal guide rails II are provided with reverse hooks, and the inner side water-permeable steel pipe is arranged in the outer side water-permeable steel pipe through the nested clamping of the metal guide rails I and the metal guide rails II.
Furthermore, the metal guide rail II comprises an upper guide rail and a lower guide rail which are of an up-down telescopic structure, the upper guide rail is inserted into the lower guide rail slot, the side surface of the lower guide rail is provided with a clamping bolt, and the upper guide rail and the lower guide rail are fixed in position through the clamping bolt.
Furthermore, the water permeable holes on the outer side water permeable steel pipe are dense circles, the positions of the holes are 250mm away from the foundation pit enclosure, the diameter is 5-10mm, the distance is 100mm away from the foundation pit enclosure, and the holes are distributed in a quincunx shape; the same water permeable holes are formed in the whole section of the inner side water permeable steel pipe.
Further, the length of the outer side permeable steel pipe is 1000-3000mm, the pipe diameter is 100-150mm, and the tail ends of the inner side permeable steel pipe and the outer side permeable steel pipe are both conical.
Furthermore, the front end of the metal woven mesh is connected to the circular baffle, and the side surface of the metal woven mesh is spot-welded on the metal guide rail II.
Further, the circumferential width of the metal sheet ring is 50-80mm, and the thickness of the metal sheet ring is 8-12 m; the thickness of the circular baffle is 8-12mm, and the circular baffle is made of metal or plastic.
Further, a rubber gasket is arranged between the circular baffle and the metal sheet ring.
Furthermore, the aperture of the water outlet pipe is 20-50mm, the length is 100-150mm, and the material is metal or plastic.
A construction method of a recyclable rapid dredging device for water leakage of a foundation pit enclosure comprises the following steps:
(1) checking the water leakage position: checking and marking the water leakage position of the foundation pit enclosure;
(2) construction preparation: selecting outer side permeable steel pipes with different specifications according to the amount of water leakage, and drilling a circular hole larger than the outer side permeable steel pipe on the foundation pit enclosure according to the aperture of the outer side permeable steel pipe;
(3) placing an outer side permeable steel pipe: embedding the outer side water permeable steel pipe into the water leakage point, and tamping the dry and hard concrete between the outer side water permeable steel pipe and the foundation pit enclosure body to ensure that the dry and hard concrete at the front section of the steel pipe is reliably connected with the foundation pit enclosure body, and the outer side water permeable steel pipe is placed;
(4) placing an inner side permeable steel pipe: nesting a metal guide rail II and a metal guide rail I, and pushing the inner side water-permeable steel pipe into the outer side water-permeable steel pipe; the inner and outer side permeable steel pipes are fixed to form a closed whole through the circular baffle and the bolts on the metal sheet ring;
(5) water plugging: installing a water control valve on a water outlet pipe, closing the water control valve, preventing water from seeping at a water leakage point, cleaning accumulated water on the bottom surface of the foundation pit and keeping the foundation pit dry;
(6) and (3) hydrophobic: a plastic water pipe is connected to the water outlet pipe, and a water control valve is opened to lead water to the reservoir;
(7) cleaning at regular intervals: checking regularly, and cleaning mud and sand deposited on the surface of the permeable cotton-flax material;
(8) and (3) recovering: after the foundation pit construction is finished, unloading the inner side permeable steel pipe for recycling;
(9) plugging and anchoring: and cement paste is injected into the outer permeable steel pipe, the surrounding soil body is compacted and compacted to locally reinforce the foundation pit enclosure, and dry and hard concrete is tamped into the foundation pit enclosure within the range of 300-500mm at the front end of the foundation pit enclosure for sealing.
The invention has the beneficial effects that:
(1) the device can prevent the danger of piping and sand flowing while orderly dredging and blocking, and solves the problem from the disaster source of water-induced foundation pit water leakage.
(2) The main body part of the invention only comprises the inner side and the outer side permeable steel pipes, the device has simple structure and convenient and fast integral construction, the metal guide rail I and the metal guide rail II are arranged between the inner side permeable steel pipes and the outer side permeable steel pipes, the installation, the periodic cleaning and the recycling of the inner side permeable steel pipes are realized, the invention is green and environment-friendly, and the cost is reduced.
(3) The outer side permeable steel pipe and the permeable holes can be used for grouting and anchoring, cement paste forms a wolf tooth bar-shaped concretion body at the cavity of the surrounding soil body, the surrounding soil body of the foundation pit is extruded and compacted, the front end of the wolf tooth bar-shaped concretion body is sealed by dry and hard concrete, the continuity of grout is ensured, and the foundation pit enclosure body is locally reinforced; the working principle accords with the concept of the modern sustainable development, a new technology can be provided for preventing and treating the foundation pit water leakage accidents, the disaster risk is reduced, and the cost is greatly saved.
(4) The middle of the inner and outer side permeable steel pipes is filled with permeable cotton-flax materials to filter water and prevent the device from being blocked; the water outlet pipe is connected to the outer sides of the inner and outer water permeable steel pipes, water permeating into the inner water permeable steel pipe is concentrated and drained to the reservoir for temporary dust fall and sprinkling in a construction site, water resources are saved, underground water can be quickly and efficiently dredged, water pressure of a soil body is reduced, the inner water permeable steel pipe can be recycled, and grouting anchoring can be realized by the outer water permeable steel pipe. The device is simple and easy to manufacture, convenient and fast to construct, green and environment-friendly, and saves resources.
Drawings
FIG. 1 is a schematic view showing a use state of the rapid dredging device for water leakage of the deep foundation pit enclosure of the present invention;
FIG. 2 is a schematic view of the connection between the inner permeable steel pipe and the drainage device in FIG. 1;
FIG. 3 is a schematic structural view of the outer water-permeable steel pipe in FIG. 1;
FIG. 4 is a schematic view of the drainage device of FIG. 1;
FIG. 5 is a detailed view of the detailed structure of the water leakage quick dredging device of the deep foundation pit enclosure;
fig. 6 is a sectional view of fig. 5 taken along line 1-1.
Reference numerals: 1-outer side water permeable steel pipe, 2-inner side water permeable steel pipe, 3-water permeable cotton-flax material, 4-metal guide rail I, 5-metal guide rail II, 6-clamping bolt, 7-rubber gasket, 8-water control valve, 9-metal woven mesh, 10-water permeable hole, 11-dry hard concrete, 12-water outlet pipe and 13-circular baffle.
Detailed Description
The present invention will be described in further detail with reference to the following examples, which are not intended to limit the invention thereto.
As shown in fig. 1 to 6, the device for quickly dredging the water leakage of the recyclable foundation pit enclosure comprises: the device that permeates water, linking device, drainage device.
The water permeable device comprises: a cylindrical outer-side permeable steel pipe 1 and an inner-side permeable steel pipe 2; the tail ends of the outer side water-permeable steel pipe 1 and the inner side water-permeable steel pipe 2 are closed, the front ends of the outer side water-permeable steel pipe 1 and the inner side water-permeable steel pipe 2 are open, and the inner side water-permeable steel pipe 2 is nested in the outer side water-permeable steel pipe 1 and is connected through a connecting device; the side walls of the outer side permeable steel pipe 1 and the inner side permeable steel pipe 2 are uniformly provided with permeable holes 10, the outer part of the inner side permeable steel pipe 2 is wrapped with a permeable cotton-flax material 3, and the outer side of the permeable cotton-flax material 3 is wrapped with a layer of metal woven net sheet 9 to be fixed on the inner side permeable steel pipe 2; when the water permeable device is arranged in the foundation pit enclosure body, the dry and hard concrete 11 is tamped between the outer water permeable steel pipe 1 and the foundation pit enclosure body, and the outer water permeable steel pipe 1 is fixed at the water leakage position of the foundation pit enclosure body.
The engagement device includes: the metal guide rail I4, the metal guide rail II5 and the clamping bolt 6; two metal guide rail I4 respectively the symmetric welding on the outer 1 inner wall of steel pipe that permeates water, two corresponding metal guide rail II5 weld on the inboard 2 outer walls of steel pipe that permeate water, metal guide rail I4 and metal guide rail II5 are for following the outside and permeate water the linear guide of steel pipe 1 and the inboard 2 axial extensions that permeate water, relative metal guide rail I4 and metal guide rail II5 top all are equipped with reverse crotch, the two is nested through the crotch, through metal guide rail II5 and the nested card of metal guide rail I4 and, inboard permeate water steel pipe 2 and lay in the outside steel pipe that permeates water 1.
The drainage device includes: a water control valve 8 and a water outlet pipe 12; the circular baffle 13 is externally connected with a water outlet pipe 12, and the water control valve 8 is arranged on the water outlet pipe 12.
When a water leakage accident occurs in the foundation pit, the device is installed according to the steps, and the water control valve is closed to ensure that the subsequent construction is not influenced; a water control valve is opened to guide water to a reservoir for temporary dust fall and water sprinkling in a building site, so that water resources are effectively utilized; and (5) checking the drainage condition regularly, and unloading the inner side permeable steel pipe for recycling after the foundation pit construction is finished.
As shown in fig. 2 and 6, the metal guide rail II5 includes an upper part guide rail and a lower part guide rail, and is of an up-down telescopic structure, the adjustment of the vertical height is realized by using the telescopic principle of the umbrella, the upper part guide rail is inserted into the lower part guide rail slot, the side surface of the lower part guide rail is provided with a clamping bolt 6, and the upper part guide rail and the lower part guide rail are fixed in position by the clamping bolt 6.
As shown in figure 3, a metal sheet ring is welded at the front end of the outer water-permeable steel pipe 1, 4 bolt holes are formed in the metal sheet ring, the circumferential width of the metal sheet ring is 50-80mm, and the thickness of the metal sheet ring is 8-12 mm.
As shown in figure 2, the front end of the inner side permeable steel pipe 2 is provided with a circular baffle 13 with the same outer diameter as the sheet metal ring, the thickness of the baffle is 8-12mm, the baffle is made of metal or plastic, and 4 bolt holes corresponding to the sheet metal ring are formed in the baffle.
The inner side water permeable steel pipe 2 is nested in the outer side water permeable steel pipe 1 and is connected with the inner side water permeable steel pipe through bolts penetrating through the circular baffle 13 and the 4 bolt holes in the metal sheet ring, so that the inner side water permeable steel pipe and the outer side water permeable steel pipe form a closed whole, and the rubber gasket 7 is arranged between the circular baffle and the metal sheet ring, so that the sealing performance is ensured.
As shown in FIG. 3, the specification of the outer permeable steel pipe 1 is selected according to the amount of water leakage, the length is 1000-3000mm, the pipe diameter is 100-150mm, and the ends of the inner permeable steel pipe 2 and the outer permeable steel pipe 1 are both conical; the inside of the outer permeable steel pipe 1 can be injected with cement slurry to realize grouting and anchoring, and the front end is sealed by dry hard concrete within the range of 300-500 mm.
As shown in figure 1, the diameter of a round hole drilled on the foundation pit enclosure body is 80-100mm larger than that of the outer permeable steel pipe 1, and the inclination angle is 5-10 degrees upwards.
As shown in fig. 3, the water permeable holes 10 on the outer side water permeable steel pipe 1 are dense circles, the positions of the holes are 250mm away from the foundation pit enclosure, the diameter is 5-10mm, and the distance is 100mm away from the foundation pit enclosure, and the holes are distributed in a quincunx shape; the inner side permeable steel pipe 2 is provided with the same permeable holes 10 in all sections.
As shown in fig. 2, the front end of the metal knitted mesh 9 is connected to a circular baffle 13, and the side surface is spot-welded on the metal guide rail II 5; the inner side permeable steel pipe 2 can be recycled.
As shown in figures 2 and 4, the outer side of the circular baffle 13 is connected with a water outlet pipe 12 with the aperture of 20-50mm and the length of 100-150mm, the material is metal or plastic, and the water control valve 8 is arranged on the water outlet pipe.
The working principle of the invention is as follows: when a water leakage accident occurs in the foundation pit, chiseling a round hole at the water leakage position of the foundation pit enclosure body, installing devices by using the metal guide rail I, the metal guide rail II and other equipment, closing a water control valve to realize water shutoff, and cleaning accumulated water in the pit to ensure that the subsequent construction is not influenced; the water control valve is opened to drain water orderly, the permeable cotton-flax material and the metal woven mesh can filter soil particles in the water body and prevent the device from being blocked, the water body permeating into the device can be recycled for temporary dust fall and watering in the construction site, and water resources are effectively utilized; the metal guide rail I and the metal guide rail II can realize the regular cleaning of the device and the recycling of the inner side permeable steel pipe, and the outer side permeable steel pipe can be used for grouting anchoring, extruding a dense peripheral soil body and locally reinforcing a foundation pit enclosure.
The construction method of the recyclable rapid dredging device for water leakage of the foundation pit enclosure comprises the following specific steps:
(1) checking the water leakage position: checking and marking the water leakage position of the foundation pit enclosure;
(2) construction preparation: transporting the device manufactured in advance and the construction necessities to the site, selecting the outer side permeable steel pipes 1 with different specifications according to the water leakage amount, and drilling a round hole larger than the outer side permeable steel pipe 1 on the foundation pit enclosure according to the aperture of the outer side permeable steel pipe 1;
(3) placing the outer side permeable steel pipe 1: cleaning sundries at the position of water leakage of the foundation pit, embedding the outer-side water-permeable steel pipe 1 into a water leakage point through a physical method, tamping dry and hard concrete 11 between the outer-side water-permeable steel pipe 1 and the foundation pit enclosure, reliably connecting the dry and hard concrete 11 at the front section of the steel pipe with the foundation pit enclosure, and finishing the placement of the outer-side water-permeable steel pipe 1;
(4) and (3) guide rail regulation: adjusting the height of a metal guide rail II5 according to the aperture size of the outer side permeable steel pipe 1, rotating a clamping bolt 6 for fixing, and coating mechanical lubricating oil on the metal guide rail II 5;
(5) placing an inner side permeable steel pipe 2: nesting a metal guide rail II5 and a metal guide rail I4, and pushing the inner side permeable steel pipe 2; a rubber gasket 7 is arranged at the front end of the water-permeable steel pipe, and the inner side and the outer side of the water-permeable steel pipe form a closed whole through bolts;
(6) water plugging: installing a water control valve 8 on a water outlet pipe 12, closing the water control valve 8, preventing water from seeping at a water leakage point, cleaning accumulated water on the bottom surface of the foundation pit and keeping dry;
(7) and (3) hydrophobic: a plastic water pipe is connected to the water outlet pipe 12, and water is guided to the reservoir by opening the water control valve 8 and is used for temporarily settling dust and sprinkling water on the construction site;
(8) cleaning at regular intervals: the drainage condition of the device is checked regularly, if phenomena such as water accumulation, water blockage, water outlet interruption and the like are found, the inner side permeable steel pipe 2 is drawn out by using the two metal guide rails, and silt deposited on the surface of the permeable cotton-flax material 3 is cleaned, so that a good drainage effect is ensured;
(9) and (3) recovering: and after the foundation pit construction is finished, the inner side permeable steel pipe 2 is dismounted, maintenance work is well done, and the permeable steel pipe is recycled.
(10) Plugging and anchoring: cement slurry can be injected into the outer side permeable steel pipe 1, the surrounding soil body is compacted and compacted to realize local reinforcement of the foundation pit enclosure, and dry and hard concrete is tamped into the front end of the foundation pit enclosure within the range of 300-500mm for sealing.
The present invention is described in detail with reference to the above embodiments, and those skilled in the art will understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (1)
1. The construction method of the recyclable rapid dredging device for water leakage of the foundation pit enclosure body is characterized by comprising the following steps of:
the dredging device comprises a cylindrical outer side permeable steel pipe (1) and an inner side permeable steel pipe (2);
the front ends of the outer side permeable steel pipes (1) and the inner side permeable steel pipes (2) are open, the tail ends of the outer side permeable steel pipes and the inner side permeable steel pipes are closed, permeable holes (10) are uniformly formed in the side walls of the outer side permeable steel pipes and the inner side permeable steel pipes (2) are nested in the outer side permeable steel pipes (1); the outer part of the inner side permeable steel pipe (2) is wrapped with a permeable cotton-flax material (3), and the permeable cotton-flax material (3) is fixed on the inner side permeable steel pipe (2) through a layer of metal woven mesh (9) which is wrapped and hooped at the outer side;
a metal sheet ring is welded at the front end of the outer side water permeable steel pipe (1), a circular baffle (13) is installed at the front end of the inner side water permeable steel pipe (2), when the inner side water permeable steel pipe (2) is nested in the outer side water permeable steel pipe (1), the circular baffle (13) is fixed on the metal sheet ring, the front ends of the outer side water permeable steel pipe (1) and the inner side water permeable steel pipe (2) are sealed, the inner side water permeable steel pipe and the outer side water permeable steel pipe form a sealed whole, a water outlet pipe (12) communicated with the inner cavity of the inner side water permeable steel pipe (2) is externally connected with the circular baffle (13), and a water control valve (8) is installed on the water outlet pipe (12);
two metal guide rails I (4) are symmetrically welded on the inner wall of the outer side water-permeable steel pipe (1), two corresponding metal guide rails II (5) are welded on the outer wall of the inner side water-permeable steel pipe (2), the metal guide rails I (4) and the metal guide rails II (5) are linear guide rails axially extending along the outer side water-permeable steel pipe (1) and the inner side water-permeable steel pipe (2), reverse hooks are arranged at the top ends of the opposite metal guide rails I (4) and the opposite metal guide rails II (5), and the inner side water-permeable steel pipe (2) is installed in the outer side water-permeable steel pipe (1) through nesting and clamping of the metal guide rails I (4) and the metal guide rails II (5);
the metal guide rail II (5) comprises an upper guide rail and a lower guide rail, and is of an up-down telescopic structure, the upper guide rail is inserted into the lower guide rail slot, the side surface of the lower guide rail is provided with a clamping bolt (6), and the upper guide rail and the lower guide rail are fixed in position through the clamping bolt (6);
the water permeable holes (10) on the outer side water permeable steel pipe (1) are dense circles, the positions of the holes are 250mm away from the foundation pit enclosure, the diameter is 5-10mm, the distance is 100mm away from the foundation pit enclosure, and the holes are distributed in a quincunx shape; the inner side permeable steel pipe (2) is provided with the same permeable holes (10) in the whole section;
the length of the outer side permeable steel pipe (1) is 1000-3000mm, the pipe diameter is 100-150mm, and the tail ends of the inner side permeable steel pipe (2) and the outer side permeable steel pipe (1) are conical;
the front end of the metal woven mesh (9) is connected with the circular baffle (13), and the lateral surface of the metal woven mesh is spot-welded on the metal guide rail II (5);
the circumferential width of the metal sheet ring is 50-80mm, and the thickness of the metal sheet ring is 8-12 m; the thickness of the circular baffle (13) is 8-12mm, and the circular baffle is made of metal or plastic;
a rubber gasket (7) is arranged between the circular baffle (13) and the metal sheet ring;
the aperture of the water outlet pipe (12) is 20-50mm, the length is 100-150mm, and the material is metal or plastic;
the construction method specifically comprises the following steps:
(1) checking the water leakage position: checking and marking the water leakage position of the foundation pit enclosure;
(2) construction preparation: selecting outer side permeable steel pipes (1) with different specifications according to the amount of water leakage, and drilling round holes larger than the outer side permeable steel pipes (1) on the foundation pit enclosure according to the hole diameter of the outer side permeable steel pipes (1);
(3) placing an outer side permeable steel pipe (1): embedding the outer side water permeable steel pipe (1) into a water leakage point, and tamping dry and hard concrete between the outer side water permeable steel pipe (1) and the foundation pit enclosure body to ensure that the dry and hard concrete at the front section of the steel pipe is reliably connected with the foundation pit enclosure body, and finishing the placement of the outer side water permeable steel pipe (1);
(4) placing the inner side permeable steel pipe (2): nesting a metal guide rail II (5) and a metal guide rail I (4), and pushing the inner side water-permeable steel pipe (2) into the outer side water-permeable steel pipe (1); the inner side and the outer side of the permeable steel pipe are fixed to form a closed whole through the circular baffle (13) and the bolts on the metal sheet ring;
(5) water plugging: installing a water control valve (8) on a water outlet pipe (12), closing the water control valve (8), preventing water from seeping at a water leakage point, cleaning accumulated water on the bottom surface of the foundation pit and keeping the accumulated water dry;
(6) and (3) hydrophobic: a plastic water pipe is connected to the water outlet pipe (12), and the water control valve (8) is opened to lead water to the reservoir;
(7) cleaning at regular intervals: checking regularly, and cleaning mud and sand deposited on the surface of the permeable cotton-flax material (3);
(8) and (3) recovering: after the foundation pit construction is finished, the inner side permeable steel pipe (2) is dismounted for recycling;
(9) plugging and anchoring: cement slurry is injected into the outer permeable steel pipe (1), the surrounding soil body is compacted and compacted to locally reinforce the foundation pit enclosure, and dry and hard concrete is tamped into the foundation pit enclosure within the range of 300-mm sand-filling materials at the front end of the foundation pit enclosure for sealing.
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| CN202010148523.6A CN111321749B (en) | 2020-03-05 | 2020-03-05 | Recyclable rapid dredging device for water leakage of foundation pit enclosure and construction method thereof |
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| CN202010148523.6A CN111321749B (en) | 2020-03-05 | 2020-03-05 | Recyclable rapid dredging device for water leakage of foundation pit enclosure and construction method thereof |
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| CN111321749B true CN111321749B (en) | 2022-02-18 |
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| CN113430990B (en) * | 2021-05-24 | 2022-05-20 | 徐州中矿岩土技术股份有限公司 | Emergency rescue pipe fitting for piping accident of dam and rescue method |
| CN113605357B (en) * | 2021-08-05 | 2022-07-01 | 三峡大学 | Drainage structure suitable for side slope and construction method thereof |
| CN114250800A (en) * | 2021-12-31 | 2022-03-29 | 北京市政建设集团有限责任公司 | Treatment method for seepage of jet grouting pile |
| CN114775629A (en) * | 2022-04-06 | 2022-07-22 | 中国能源建设集团广东省电力设计研究院有限公司 | Blocking dredging device for support body and construction method thereof |
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| CN105587945B (en) * | 2014-10-21 | 2017-10-20 | 中铁西北科学研究院有限公司深圳南方分院 | Changeable type composite draining pipe |
| CN105821830B (en) * | 2016-05-05 | 2018-03-23 | 浙江大学 | A kind of anatonosis siphon drainge system for hypotonicity slight slope |
| CN206189435U (en) * | 2016-09-26 | 2017-05-24 | 北京市勘察设计研究院有限公司 | It dredges groundwater block structure who afterwards blocks up to leak some elder generations to stagnant water curtain |
| CN107012879A (en) * | 2017-05-23 | 2017-08-04 | 梁美欣 | Foundation ditch water leak preventing structure |
| CN108612108B (en) * | 2018-07-26 | 2023-08-01 | 大成科创基础建设股份有限公司 | Plugging device for deep foundation pit |
| CN209137401U (en) * | 2018-09-30 | 2019-07-23 | 卢雯 | A kind of stomach tube |
| CN209896275U (en) * | 2019-05-29 | 2020-01-03 | 苏州森亿冷热缩材料有限公司 | Insulating thermal shrinkage rubber sleeve |
| CN110607793A (en) * | 2019-09-24 | 2019-12-24 | 杭州昂创科技有限公司 | Construction method of recoverable expanded drainage soil nailing wall for foundation pit support |
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Effective date of registration: 20220916 Address after: Room 603, Unit 1, No. 5, Huayuan Hai Lancheng Phase 5, Xuanwu East Road, Chanba Ecological Zone, Xi'an City, Shaanxi Province 710000 Patentee after: Xi'an Huizhi Chuangke Engineering Technology Co.,Ltd. Address before: 730050, No. 287 Lan Ping Road, Qilihe District, Gansu, Lanzhou Patentee before: LANZHOU University OF TECHNOLOGY |
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