CN115387361B - Tunnel start-stop foundation pit construction method for water-rich soil layer - Google Patents
Tunnel start-stop foundation pit construction method for water-rich soil layer Download PDFInfo
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- CN115387361B CN115387361B CN202210946786.0A CN202210946786A CN115387361B CN 115387361 B CN115387361 B CN 115387361B CN 202210946786 A CN202210946786 A CN 202210946786A CN 115387361 B CN115387361 B CN 115387361B
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- reinforcing pipe
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- soil layer
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 239000002689 soil Substances 0.000 title claims abstract description 28
- 238000010276 construction Methods 0.000 title claims abstract description 16
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 76
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000001914 filtration Methods 0.000 claims abstract description 8
- 238000005507 spraying Methods 0.000 claims abstract description 4
- 238000004804 winding Methods 0.000 claims description 11
- 238000009825 accumulation Methods 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 6
- 239000010802 sludge Substances 0.000 claims description 4
- 238000007790 scraping Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 8
- 239000012535 impurity Substances 0.000 description 15
- 238000005728 strengthening Methods 0.000 description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
- B01D29/03—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements self-supporting
- B01D29/036—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements self-supporting ring shaped
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
- B01D29/6469—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element scrapers
- B01D29/6484—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element scrapers with a translatory movement with respect to the filtering element
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
- E02D17/202—Securing of slopes or inclines with flexible securing means
-
- 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
- E02D19/08—Restraining of underground water by employing open ditches arranged below the level of the 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Paleontology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Agronomy & Crop Science (AREA)
- Soil Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The application discloses a tunnel start-stop point foundation pit construction method of a water-rich soil layer, which relates to the technical field of foundation pit construction of the water-rich soil layer and comprises the following steps of: s1, arranging drainage ditches at the outer top of a foundation pit and the inner bottom of the foundation pit; s2, paving a reinforcing mesh on the surface of the side slope; s3, horizontally driving a reinforcing pipe into the side slope, fixedly connecting the reinforcing pipe with the reinforcing mesh, and arranging a filtering assembly at one end of the reinforcing pipe inserted into the soil layer of the side slope, wherein the inner cavity of the reinforcing pipe is hollow; s4, spraying a concrete layer on the slope surface. The application has the effects of ensuring the stability of the reinforcing pipe in the use process, ensuring the normal drainage of the reinforcing pipe, and simultaneously, timely draining the water in the side slope through the reinforcing pipe and flowing into the drainage ditch at the bottom in the foundation pit.
Description
Technical Field
The application relates to the technical field of foundation pit construction of a water-rich soil layer, in particular to a tunnel starting and stopping point foundation pit construction method of the water-rich soil layer.
Background
When foundation pit at rich water soil layer geology department is under construction, the water in the side slope body produces still water and moves water pressure, weakens the adhesion between the structural surface, reduces the stability between the stratum, consequently needs in time to discharge the water in the slope body.
In the related art, when constructing the foundation pit of tunnel starting point, set up the escape canal in foundation pit outer top and foundation pit inner bottom generally to insert on the side slope and establish the drain pipe, the escape canal at foundation pit outer top is used for preventing outside water inflow in the foundation pit bottom, and the bottom escape canal is used for the water drainage in the foundation pit.
However, in the actual construction process, the slope surface soil property at the geology of the water-rich soil layer is relatively soft, and the cohesive force between soil layers is poor, so that the stability of the drain pipe inserted into the soil layer is lower, and when the pipe orifice of the drain pipe is inclined upwards due to downward inclination of one end of the drain pipe inserted into the soil layer, which is originally horizontally inserted, the normal drainage of the drain pipe is affected, and an improvement space exists.
Disclosure of Invention
In order to improve stability of a drain pipe and ensure normal drainage of the drain pipe, the application provides a tunnel starting and stopping point foundation pit construction method for a water-rich soil layer.
The tunnel start and stop point foundation pit construction method for the water-rich soil layer provided by the application adopts the following technical scheme:
a tunnel start-stop point foundation pit construction method of a water-rich soil layer comprises the following steps:
s1, arranging drainage ditches at the outer top of a foundation pit and the inner bottom of the foundation pit;
s2, paving a reinforcing mesh on the surface of the side slope;
s3, horizontally driving a reinforcing pipe into the side slope, fixedly connecting the reinforcing pipe with the reinforcing mesh, and arranging a filtering assembly at one end of the reinforcing pipe inserted into the soil layer of the side slope, wherein the inner cavity of the reinforcing pipe is hollow;
s4, spraying a concrete layer on the slope surface.
Through adopting above-mentioned technical scheme, through adopting above-mentioned construction method, insert the stiffening tube in the side slope and be connected with the reinforcing bar net and play the reinforcement effect to the side slope, and further consolidate through concrete layer, the hollow stiffening tube of inner chamber uses as the drain pipe, thereby guarantee that stiffening tube in-process stability in the use guarantees that stiffening tube normally drains, make the water in the side slope in time discharge through the stiffening tube, flow to the escape canal of foundation ditch inner bottom, and filter assembly's setting then has played the filtration to the water that flows in the stiffening tube, reach the operation requirement of water, also effectively reduced the impurity such as silt and blockked up the condition of stiffening tube.
Preferably, the filter assembly comprises a filter screen arranged in a roll, and the winding axis of the filter screen is perpendicular to the axis of the reinforcing pipe.
Through adopting above-mentioned technical scheme, the setting of filter screen has realized the filtration to impurity such as silt in the water, guarantees the quality of exhaust water.
Preferably, the reinforcing pipe is a square pipe, and a space is reserved between two adjacent layers of the filter screen;
the filter screen is connected to the inner wall of the reinforcing pipe in a sliding manner along the winding direction of the filter screen, a pulling assembly for pulling the filter screen outwards is arranged on the slope surface of the slope, and a reset assembly for resetting the filter screen is arranged in the inner cavity of the reinforcing pipe;
an upper scraper for scraping the sludge on the outer wall of the filter screen is fixedly arranged on the top wall of the inner cavity of the reinforcing pipe.
By adopting the technical scheme, after the filter screen is used for a period of time, impurities such as silt and the like are attached to the outer wall of the filter screen, so that normal drainage is affected; through pulling the outside removal of subassembly pulling filter screen, go up the scraper and strike off the impurity that adheres to on the outer wall of the filter screen of removal, realize the clearance to the filter screen, extension reinforcing pipe's live time, simultaneously, because the filter screen lapping sets up, has part filter screen section to filter the water all the time, does not influence reinforcing pipe's normal use when clearing up the filter screen.
Preferably, the bottom wall of the inner cavity of the reinforcing tube is provided with a lower scraper, and the total length of the filter screen is larger than twice the length of the filter screen section between the upper scraper and the lower scraper.
Through adopting above-mentioned technical scheme, the filter screen outwards pulls certain distance, and the last scraper is cleared up the outer wall of filter screen and is continued to use after a period, and the filter screen is retrieved to initial condition under reset assembly's effect, and the filter screen recovery in-process, lower scraper is cleared up the outer wall of filter screen, has further prolonged the live time of filter screen, has reduced the change number of times of filter screen.
Preferably, the lower scraper is obliquely arranged, the reinforcing pipe is provided with a dirt accumulation groove, and the dirt accumulation groove is positioned at the lower end of the lower scraper.
Through adopting above-mentioned technical scheme, the impurity that is scraped down by the scraper falls to the guide board on finally falling into the dirt accumulation groove, reduces the influence to the stiffening tube volume of leading to water.
Preferably, a sealing gasket is arranged between the two side walls of the upper scraper and the two side walls of the reinforced pipe, and a sealing gasket is arranged between the two side walls of the lower scraper and the two side walls of the reinforced pipe.
Through adopting above-mentioned technical scheme, go up scraper and scraper down and play sealed effect, avoid rivers to flow from the clearance between filter screen outside and the enhancement pipe, compare in the filter screen and add the sealing washer between the enhancement pipe, reduced the frictional force when the filter screen removes, be favorable to the removal of filter screen.
Preferably, waterproof coatings are coated on two side walls of the upper scraper and the lower scraper, which are opposite to each other.
Through adopting above-mentioned technical scheme, waterproof coating's setting has reduced the appearance that impurity such as silt attached to on last scraper and the doctor down.
Preferably, the pulling assembly comprises a reel arranged on the side slope, a pull rope wound outside the reel and a driving piece for driving the reel to rotate, and the other end of the pull rope is fixed at the head end of the filter screen.
Through adopting above-mentioned technical scheme, when needing outwards pulling filter screen, through driving piece drive spool rotation, realize the rolling of stay cord, and then drive the filter screen and outwards remove.
Preferably, the reset component comprises an elastic piece, one end of the elastic piece is fixedly arranged in the inner cavity of the reinforcing pipe, and the other end of the elastic piece is fixedly arranged at the tail end of the filter screen.
Through adopting above-mentioned technical scheme, when needing the filter screen to retrieve, through driving piece drive pivot reverse rotation, the stay cord outwards emits, and the filter screen is retrieved to initial condition under the effect of elastic component simultaneously.
Preferably, a sliding groove arranged along the winding direction of the filter screen is formed in the side wall of the inner cavity of the reinforcing pipe, a sliding strip is fixedly arranged on the side wall of the filter screen along the extending direction of the filter screen, and the sliding strip is in sliding fit with the sliding groove.
Through adopting above-mentioned technical scheme, realized that the filter screen is connected with the slip of strengthening pipe, made the filter screen remove according to predetermined direction, realized that the filter screen is moved outward and is retrieved.
In summary, the present application includes at least one of the following beneficial technical effects:
1. by adopting the construction method, the reinforcing pipe with the hollow inner cavity is used as a drain pipe, so that the stability of the reinforcing pipe in the use process is ensured, the normal drainage of the reinforcing pipe is ensured, meanwhile, the water in the side slope is timely discharged through the reinforcing pipe and flows into the drain ditch at the inner bottom of the foundation pit, the filter assembly has a filtering effect on the water body flowing into the reinforcing pipe, the use requirement of the water body is met, and the situation that the reinforcing pipe is blocked by impurities such as silt and the like is effectively reduced;
2. through the outward removal of the first end of pulling subassembly pulling filter screen, the scraper strikes off the impurity of adhering to on the outer wall of the filter screen of removal, realizes the clearance to the filter screen, prolongs the live time of strengthening the pipe, simultaneously, because the filter screen lapping sets up and the outer wall of filter screen butt throughout in strengthening the inner wall of pipe, does not influence the normal use of strengthening the pipe when clearing up the filter screen.
Drawings
Fig. 1 is a schematic view showing a side slope and a structure of a reinforcing mesh, a concrete layer, a reinforcing pipe and a pulling assembly located on the side slope.
Fig. 2 is a schematic cross-sectional view showing the reinforcement tube, filter assembly and spring structure.
FIG. 3 is a schematic partial cross-sectional view showing the structure of the reinforcing tube, filter assembly, upper blade, lower blade, reset assembly, and dirt accumulation groove.
Fig. 4 is a schematic partial cross-sectional view showing a slip structure between a screen and a reinforcing tube.
Reference numerals illustrate:
11. a reinforcing mesh; 12. a concrete layer; 2. a reinforcing tube; 21. a chute; 22. a dirt accumulation groove; 23. an extension groove; 3. a filter screen; 31. a winding axis; 32. a slide bar; 33. a first usage segment; 34. a second usage segment; 4. pulling the assembly; 41. an outer frame; 42. a reel; 43. a pull rope; 44. a motor; 5. a scraper is arranged; 6. a lower scraper; 7. and (3) a spring.
Detailed Description
The application is described in further detail below with reference to fig. 1-4.
The embodiment of the application discloses a tunnel starting and stopping point foundation pit construction method for a water-rich soil layer, which is used for reinforcing and draining a water-rich side slope at one side of a foundation pit.
The water drainage ditch is arranged at the outer top of the foundation pit and the inner bottom of the foundation pit, the water drainage ditch at the outer top of the foundation pit is used for preventing external water from flowing into the bottom of the foundation pit, and the water drainage ditch at the inner bottom of the foundation pit is used for draining away water in the foundation pit.
The reinforcing steel bar net 11 is paved on the surface of the side slope, the reinforcing steel bar net 11 is fixedly connected with the reinforcing pipe 2, the reinforcing pipe 2 is horizontally inserted into the side slope, a plurality of reinforcing pipes 2 are arranged at intervals along the inclined direction of the side slope surface, and a filtering component for filtering impurities such as silt is arranged in an inner cavity of one end of the reinforcing pipe 2 inserted into the soil layer of the side slope.
The concrete layer 12 is arranged outside the reinforcing mesh 11.
The reinforcing pipe 2 is a square pipe, and one end of the reinforcing pipe 2 close to the slope surface is flush with the slope surface.
The filter component comprises a filter screen 3 which is arranged in a coiled manner, and a space is reserved between two adjacent layers of the filter screen 3 after coiling. The screen 3 is wound around an axis direction which is a winding axis 31 of the screen 3, and as shown in fig. 3, the winding axis 31 of the screen 3 is perpendicular to the axis of the reinforcing pipe 2.
Both sides of the filter screen 3 are slidably connected to the inner wall of the reinforcing pipe 2. A chute 21 is formed in the inner wall of the reinforcing pipe 2, the chute 21 is arranged along the winding and bending direction of the filter screen 3, and one end, close to the slope surface, of the chute 21 continues to extend outwards to the pipe orifice of the reinforcing pipe 2; a slide bar 32 is fixedly arranged on the side surface of the filter screen 3 along the winding and bending direction of the filter screen, and the slide bar 32 is slidingly connected in the chute 21. The thickness of the chute 21 is smaller than that of the filter screen 3, so that two side walls of the filter screen 3 are always attached to the inner wall of the reinforced pipe 2, and the tightness between the side walls of the filter screen 3 and the inner wall of the reinforced pipe 2 is improved.
The slope surface is provided with a pulling component 4 for pulling the filter screen 3 outwards, and a reset component for inwards rolling and resetting the filter screen 3 is arranged in the reinforcing pipe 2. An upper scraper 5 is fixedly arranged on the top wall of the reinforced pipe 2, the upper scraper 5 is obliquely downwards arranged, the lower end of the upper scraper 5 is abutted to the outer wall of the filter screen 3, and a sealing gasket is arranged between the two side walls of the upper scraper 5 and the two side walls of the reinforced pipe 2. The lower scraper 6 is fixedly arranged on the bottom wall of the reinforced pipe 2, the lower scraper 6 is obliquely upwards arranged, the higher end of the lower scraper 6 is abutted to the outer wall of the filter screen 3, and a sealing gasket is arranged between the two side walls of the lower scraper 6 and the two side walls of the reinforced pipe 2. A dirt accumulation groove 22 is provided in the reinforcing tube 2 at the lower end edge of the lower blade 6.
The total length of the screen 3 is greater than twice the length of the section of screen 3 between the upper blade 5 and the lower blade 6.
As shown in fig. 2, screen 3 includes a first use segment 33 and a second use segment 34. After the filter screen 3 is used for a period of time, impurities such as silt are attached to the outer wall of the filter screen 3, the filter screen 3 is pulled to move outwards by the pulling component 4, the upper scraper 5 scrapes the impurities attached to the outer wall of the filter screen 3, the first using section 33 of the filter screen 3 is cleaned, and the pulling is stopped until the second using section 34 of the filter screen 3 is positioned between the upper scraper 5 and the lower scraper 6; the filter screen 3 continues to use for a period of time, releases the outward effort of pulling subassembly 4 to filter screen 3, and filter screen 3 retrieves under reset assembly's effect, until the first section 33 that uses of filter screen 3 moves to between upper scraper 5 and lower scraper 6, and in this process, lower scraper 6 scrapes impurity such as silt of the section 34 outer wall that uses of filter screen 3 second, clears up the section 34 that uses of filter screen 3 second.
In the actual use process, the worker can control the outward movement and the recovery length of the filter screen 3 by controlling the moving distance of the pull rope 43.
In order to prevent foreign substances such as sludge from adhering to the surfaces of the upper blade 5 and the lower blade 6, waterproof coatings are coated on both side walls of the upper blade 5 opposite to the lower blade 6, and in this embodiment, the waterproof coatings are polyurethane waterproof coatings.
The pulling assembly 4 comprises an outer frame 41 arranged on the outer side of the concrete layer 12, a scroll 42 rotatably connected to the outer frame 41, a pull rope 43 wound on the outer side of the scroll 42 and a motor 44 for driving the scroll 42 to rotate, and the other end of the pull rope 43 is fixed at the middle position of the head end of the filter screen 3.
The reset component comprises two springs 7 which are respectively positioned at two sides of the filter screen 3, the inner wall of the reinforced pipe 2 is continuously extended at the tail end of the chute 21 to form an extending groove 23 which is arranged in an arc shape, the springs 7 are positioned in the extending groove 23, one ends of the springs 7 are fixed in the extending groove 23, and the other ends of the springs 7 are fixed in the sliding strips 32.
When the first using section 33 of the filter screen 3 is cleaned, the motor 44 drives the scroll 42 to rotate, so that the pull rope 43 is wound up, and the filter screen 3 is driven to move outwards; when the second using section 34 of the filter screen 3 is cleaned, the motor 44 drives the rotating shaft to reversely rotate, the pull rope 43 is outwards discharged, and the filter screen 3 is recovered to an initial state under the action of the spring 7.
A tunnel start-stop point foundation pit construction method of a water-rich soil layer comprises the following steps:
s1, arranging drainage ditches at the outer top of a foundation pit and the inner bottom of the foundation pit;
s2, paving a reinforcing mesh 11 on the surface of the side slope;
s3, horizontally driving the reinforcing pipe 2 into the side slope and fixedly connecting the reinforcing pipe 2 with the reinforcing mesh 11;
s4, spraying concrete layer 12 on the slope surface of the slope and further reinforcing the slope surface and the reinforcing pipe 2;
s5, the reinforcing pipe 2 is used as a drain pipe at the same time, impurities such as silt and the like are attached to the outer wall of the filter screen 3 after the filter screen 3 in the reinforcing pipe 2 is used for a period of time, the filter screen 3 is driven to move outwards, the upper scraper 5 scrapes the impurities attached to the outer wall of the filter screen 3, the first using section 33 of the filter screen 3 is cleaned, and pulling is stopped until the second using section 34 of the filter screen 3 is positioned between the upper scraper 5 and the lower scraper 6;
s5, continuing to use the filter screen 3 for a certain time, recycling the filter screen 3 to an initial state, scraping impurities such as sludge on the outer wall of the second use section 34 of the filter screen 3 by the lower scraper 6, and cleaning the second use section 34 of the filter screen 3.
The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (7)
1. The tunnel starting and stopping point foundation pit construction method for the water-rich soil layer is characterized by comprising the following steps of:
s1, arranging drainage ditches at the outer top of a foundation pit and the inner bottom of the foundation pit;
s2, paving a reinforcing mesh (11) on the surface of the side slope;
s3, horizontally driving a reinforcing pipe (2) into the side slope, fixedly connecting the reinforcing pipe (2) with the reinforcing mesh (11), and arranging a filtering component at one end of the reinforcing pipe (2) inserted into the soil layer of the side slope, wherein the inner cavity of the reinforcing pipe (2) is hollow;
s4, spraying a concrete layer (12) on the slope surface;
the filter assembly comprises a filter screen (3) which is arranged in a coiled manner, and a winding axis (31) of the filter screen (3) is perpendicular to the axis of the reinforcing pipe (2);
the reinforcing pipe (2) is a square pipe, and a space is reserved between two adjacent layers of the filter screen (3);
the filter screen (3) is connected to the inner wall of the reinforcing pipe (2) in a sliding manner along the winding direction of the filter screen, a pulling assembly (4) for pulling the filter screen (3) outwards is arranged on the slope surface of the slope, and a reset assembly for resetting the filter screen (3) is arranged in the inner cavity of the reinforcing pipe (2);
an upper scraper (5) for scraping the sludge on the outer wall of the filter screen (3) is fixedly arranged on the top wall of the inner cavity of the reinforcing pipe (2);
the inner cavity bottom wall of the reinforcing pipe (2) is provided with a lower scraper (6), and the total length of the filter screen (3) is larger than twice the section length of the filter screen (3) between the upper scraper (5) and the lower scraper (6).
2. The method for constructing the foundation pit at the tunnel start-stop point of the water-rich soil layer, which is characterized by comprising the following steps of: the lower scraper (6) is obliquely arranged, the reinforcing pipe (2) is provided with a dirt accumulation groove (22), and the dirt accumulation groove (22) is positioned at the lower end of the lower scraper (6).
3. The method for constructing the foundation pit at the tunnel start-stop point of the water-rich soil layer, which is characterized by comprising the following steps of: sealing gaskets are arranged between the two side walls of the upper scraper (5) and the two side walls of the reinforced pipe (2), and sealing gaskets are arranged between the two side walls of the lower scraper (6) and the two side walls of the reinforced pipe (2).
4. The method for constructing the foundation pit at the tunnel start-stop point of the water-rich soil layer, which is characterized by comprising the following steps of: waterproof coatings are coated on two opposite side walls of the upper scraper (5) and the lower scraper (6).
5. The method for constructing the foundation pit at the tunnel start-stop point of the water-rich soil layer, which is characterized by comprising the following steps of: the pulling assembly (4) comprises a reel (42) arranged on a side slope, a pull rope (43) wound outside the reel (42) and a driving piece for driving the reel (42) to rotate, and the other end of the pull rope (43) is fixedly arranged at the head end of the filter screen (3).
6. The method for constructing the foundation pit at the tunnel start-stop point of the water-rich soil layer, which is characterized by comprising the following steps of: the reset component comprises an elastic piece, one end of the elastic piece is fixedly arranged in the inner cavity of the reinforcing pipe (2), and the other end of the elastic piece is fixedly arranged at the tail end of the filter screen (3).
7. The method for constructing the foundation pit at the tunnel start-stop point of the water-rich soil layer, which is characterized by comprising the following steps of: the inner cavity side wall of the reinforcing pipe (2) is provided with a sliding groove (21) arranged along the winding direction of the filter screen (3), the side wall of the filter screen (3) is fixedly provided with a sliding strip (32) along the extending direction of the filter screen, and the sliding strip (32) is in sliding fit in the sliding groove (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210946786.0A CN115387361B (en) | 2022-08-09 | 2022-08-09 | Tunnel start-stop foundation pit construction method for water-rich soil layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210946786.0A CN115387361B (en) | 2022-08-09 | 2022-08-09 | Tunnel start-stop foundation pit construction method for water-rich soil layer |
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| Publication Number | Publication Date |
|---|---|
| CN115387361A CN115387361A (en) | 2022-11-25 |
| CN115387361B true CN115387361B (en) | 2023-08-11 |
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| JPH02183006A (en) * | 1989-01-09 | 1990-07-17 | Sumitomo Metal Ind Ltd | Manufacturing method, its ground drainage member and anti-liquefaction method therewith |
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| CN211229224U (en) * | 2019-11-05 | 2020-08-11 | 江苏双楼建设集团有限公司 | Civil building prevents blockking up drainage structures |
| CN215539100U (en) * | 2021-01-26 | 2022-01-18 | 泗县龙宇农业合作社联合社 | Water conservancy pipeline filter equipment |
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| CN115387361A (en) | 2022-11-25 |
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