CN113914927A - A combined membrane bag type gravel filtration and drainage device for high water pressure tunnels - Google Patents
A combined membrane bag type gravel filtration and drainage device for high water pressure tunnels Download PDFInfo
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- CN113914927A CN113914927A CN202111267906.6A CN202111267906A CN113914927A CN 113914927 A CN113914927 A CN 113914927A CN 202111267906 A CN202111267906 A CN 202111267906A CN 113914927 A CN113914927 A CN 113914927A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 117
- 238000001914 filtration Methods 0.000 title claims abstract description 69
- 239000012528 membrane Substances 0.000 title claims abstract description 28
- 229910000831 Steel Inorganic materials 0.000 claims description 31
- 239000010959 steel Substances 0.000 claims description 31
- 239000007787 solid Substances 0.000 claims description 14
- 239000004746 geotextile Substances 0.000 claims description 11
- 230000009471 action Effects 0.000 claims description 5
- 239000004744 fabric Substances 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims description 2
- 239000002689 soil Substances 0.000 abstract description 25
- 238000009412 basement excavation Methods 0.000 abstract description 9
- 230000006378 damage Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 6
- 239000004576 sand Substances 0.000 abstract description 5
- 238000003825 pressing Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 7
- 239000011435 rock Substances 0.000 description 6
- 238000004873 anchoring Methods 0.000 description 5
- 230000009172 bursting Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 208000002193 Pain Diseases 0.000 description 2
- 230000004323 axial length Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F16/00—Drainage
- E21F16/02—Drainage of tunnels
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/082—Screens comprising porous materials, e.g. prepacked screens
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/084—Screens comprising woven materials, e.g. mesh or cloth
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Geochemistry & Mineralogy (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geophysics (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention relates to a water drainage device of a high-water-pressure tunnel, in particular to a combined membrane bag type gravel-attached filtering water drainage device for the high-water-pressure tunnel, which comprises a guide fixing system, a combined filtering system and a pipe orifice water drainage system, wherein the guide fixing system is connected with the combined filtering system through a pipeline; the guide fixing system is arranged on the combined filtering system and is used for guiding and fixing when being installed; the combined filtering system comprises a filtering pipe, a plurality of layers of gravel-attached membrane bags and a reverse filtering layer, wherein the reverse filtering layer is filled in the plurality of layers of gravel-attached membrane bags, and the plurality of layers of gravel-attached membrane bags are attached to the outer wall of the filtering pipe; one end of the pipe orifice water drainage system is fixedly connected with the tail end of the filter pipe and used for draining water. Compared with the prior art, the method has the advantages that through the steps of guide pressing, reverse stabbing, expansion fixing, reverse gravel filtering, combined filtering, automatic pressure relief and the like, high-pressure water inrush caused by tunnel face excavation can be improved, soil flowing and sand flowing caused by seepage damage can be prevented until collapse and mud gushing occur, and the method has great significance for realizing pressure relief and water drainage of the high-water-pressure tunnel and tunnel engineering safety.
Description
Technical Field
The invention relates to a water drainage device for a high-water-pressure tunnel, in particular to a combined membrane bag type gravel-attached filtering water drainage device for the high-water-pressure tunnel.
Background
Underground water has adverse effect on underground engineering, and in numerous construction projects, especially tunnel engineering, a small amount of gushing water generally has little influence on tunnel construction, but a large amount of tunnel gushes and gushes water and will cause serious influence on tunnel construction, even bury constructors and machines, so the working condition that the working face needs to be drained and depressurized in real time during excavation is often met in the construction of tunnel engineering. If in tunnel face the place ahead if appear fault broken zone or half diagenesis stratum when, the excavation can cause high pressure to gush water, and then produces the flowing soil, the quicksand because of the infiltration destruction, until leading to the collapse to appear and gush mud etc. can cause constructor's life safety and construction equipment's a large amount of losses this moment, still can seriously influence the construction progress in addition.
The existing horizontal drainage well is drilled horizontally, but cannot realize gravel filling, and after a horizontal well pipe without gravel filling is added, silt can block a water inlet hole or flow soil is generated along the water inlet hole, so that water inrush and mud inrush accidents cannot be controlled. Therefore, for the tunnel excavation site in which the situation can occur, new technology for mud outburst prevention and control is urgently needed to be developed.
Chinese patent CN109667620B discloses a tunnel surrounding rock water drain pipe, which comprises a pipe body, wherein one end of the pipe body is a head end, the other end is a tail end, a cavity arranged along the axial direction of the pipe body is arranged on the pipe body, one end of the cavity adjacent to the tail end of the pipe body is closed, the other end penetrates through the head end of the pipe body, and a water drain hole is arranged on the pipe wall of the pipe body; the water outlet extends to the cavity along the radial direction of the pipe body in an inclined mode, and extends from the outer side to the inner side from the tail end to the head end of the pipe body along the axial direction of the pipe body. Although this patent can play certain supporting role and avoid surrounding rock granule to get into the outlet and block up outlet or outlet pipe, the ability that the device combats water impact is relatively weak, and water pressure is probably washed out when big to still can not prevent mud jam outlet or outlet pipe, and then can not control gushing out water and gushing out mud accident.
Disclosure of Invention
The invention aims to solve at least one of the problems, and provides a combined film bag type gravel pasting filtering and water draining device for a high-water-pressure tunnel, which is mainly applied to treatment of water burst of loose surrounding rock of the high-water-pressure tunnel, realizes improvement of high-pressure water burst caused by excavation of a tunnel face, and further prevents the conditions of soil flow, sand flow, even collapse and mud burst caused by permeation damage.
The purpose of the invention is realized by the following technical scheme:
a combined film bag type gravel pasting filtering water draining device for a high-water-pressure tunnel comprises a guide fixing system, a combined filtering system and a pipe orifice water draining system;
the guide fixing system is arranged on the combined filtering system, is used for guiding when the device is installed and is fixed after the device is installed;
the combined filtering system comprises a filtering pipe, a plurality of gravel-attached film bags and a reverse filtering layer, wherein the reverse filtering layer is filled in the gravel-attached film bags, and the gravel-attached film bags are attached to the outer wall of the filtering pipe;
one end of the pipe orifice water drainage system is fixedly connected with the tail end of the filter pipe and used for draining water.
Preferably, the guiding and fixing system comprises a guiding head and a plurality of barbed wing parts; the guide head is fixed at the front end of the filter tube, and the barb-resisting wing parts are symmetrically arranged outside the filter tube.
Preferably, the front end of the guide head is provided with a tip, so that the rock soil layer in front of the tunnel face is convenient to position and press.
Preferably, the guide head is tapered.
Preferably, the barb-resisting wing part is inserted into a certain position of the front rock-soil layer in a positioning manner at the guide head and then extends out to pierce into the soil body, so that the barb-resisting effect is achieved.
Preferably, the reverse thorn wing part is provided with a reverse rubber sleeve, and the reverse rubber sleeve is opened under the action of water pressure to form an umbrella-shaped water stop body with the reverse thorn wing part for reducing the flow velocity of water flow.
Preferably, the multilayer gravel-attached film bag is made of geotextile or geotextile, and a reverse filter layer is filled in the bag to form gravel attachment together to play a filtering role.
Preferably, the filtering pipe is formed by connecting a plurality of floral pipes with holes on the side wall in a threaded manner.
Preferably, the lengths of the floral tubes are manufactured according to standardized requirements, and the number of the floral tubes is adjusted according to actual requirements so as to change the lengths of the filter tubes.
Preferably, the reverse filtering layer is filled in the multilayer gravel-attached film bag according to the gradation of the reverse filtering, and the reverse filtering layer mainly plays a role in filtering and prevents silt from blocking the open holes on the side wall of the filtering pipe.
Preferably, the combined filter system further comprises a steel ring, a steel sheet and a locking connecting piece; the steel rings are semicircular, are arranged at the threaded connection positions of the filter pipes in pairs and are used for supporting the sectional connection of the top surface and the bottom surface of the multi-layer gravel-attached film bag and the filter pipes; the steel sheet is axially arranged at the joint of the filter pipe and plays a supporting role together with the steel ring; the steel ring and the steel sheet are fixed on the outer side of the multilayer gravel film bag through the lock catch connecting piece, so that the whole system can be combined. The support of the combined filtering system and the fixation among the plurality of floral tubes are realized by the combined action of the steel ring, the steel sheet and the locking connecting piece.
Preferably, the pipe orifice water drainage system comprises a solid wall water drainage pipe and a pipe orifice section, one end of the solid wall water drainage pipe is fixedly connected with the tail end of the filter pipe, the other end of the solid wall water drainage pipe is fixedly connected with the front end of the pipe orifice section through a flange plate, and water flows out of the water drainage device from the tail end of the pipe orifice section after flowing through the solid wall water drainage pipe through the filter pipe.
Preferably, the flange plate is provided with an expansion anchoring part and a pipe orifice stopping rubber sleeve, and the expansion anchoring part penetrates through the flange plate and is used for expanding and fixing the flange plate by utilizing an expansion screw; the pipe orifice stopping rubber sleeve is arranged at the intersection of the solid-wall drain pipe and the flange to prevent water from flowing out of the gap.
Preferably, the expansion anchor is an expansion screw.
Preferably, the pipe orifice section in be provided with pressure gauge and pressure release ball valve, the manometer monitor the water pressure that flows through the pipe orifice section in real time, pressure release ball valve can manually open the sluicing or when the manometer survey value exceeded the threshold value, automatically opened the sluicing.
Preferably, the end of the pipe orifice section is provided with a hammering pad to prevent the water drainage device from being damaged when the pipe orifice section is manually hammered and inserted into a soil body.
The working principle of the invention is as follows:
when a tunnel is excavated and leakage points are locally formed on the tunnel face, the perforated pipe is connected through threads to form a filter pipe with required length, and a solid-wall drain pipe is welded at the tail end of the filter pipe. The gravel-adhered membrane bags are filled with gravels of a certain gradation to form a reverse filtering layer, the axial length of the gravel-adhered membrane bags is adjusted to be matched with the filtering pipes, the steel rings and the steel sheets are axially arranged up and down, the components are fixed through the lock catch connecting piece to form the gravel-adhered membrane bags which are wrapped outside the filtering pipes in a combined mode, and the gravel-adhered membrane bags are only applied to the section of the filtering pipe which is provided with holes and needs to be drained and decompressed to form a combined filtering system. The front end of the combined filtering system is provided with a guide head, the positions of the sections of the perforated pipes connected and combined with the steel rings are provided with reverse thorn wing parts which are fixed on the multilayer gravel pasting film bags on the outer layers of the filtering pipes through fixing bolts, and reverse rubber sleeves are wrapped on the reverse thorn wing parts.
After the combination is completed, horizontal drilling is performed on the excavation face, the water drainage device is lifted to a specified height by using the trolley, the water drainage device is placed at a specified depth, the anti-puncturing wing part extends out to be used for fixing the anti-pulling-out part, the solid wall water drainage pipe part enters the soil body at the moment, and the rest part is connected with the pipe orifice section through the flange plate. Under the protection of the hammering pad, the solid-wall drain pipe is completely pushed into the soil body by external force, meanwhile, the flange plate is tightly attached to the wall surface of the hole, a pipe orifice stopping rubber sleeve is arranged on one side of the solid-wall drain pipe of the flange plate to prevent water leakage from the gap, and then the expansion anchoring part is driven into the hole to penetrate through the flange plate and be expanded and fixed in the soil body. And a pressure meter and a pressure relief ball valve are arranged on the pipe orifice section to control water drainage.
The method comprises the steps that a local high-pressure water bursting point appears on a water stop wall or a tunnel face, a guide head is aligned to the water bursting point, the guide head is pressed into a certain depth by manual hammering or machinery, water in a high-water-pressure section in front of the tunnel face enters a filter pipe after being filtered by a multi-layer gravel film bag made of geotextile and a reverse filter layer arranged in the bag, and flows to a solid-wall drain pipe and a pipe orifice section along the axial direction of the filter pipe, a pressure gauge arranged at the pipe orifice section monitors the internal water pressure in real time, in the groundwater treatment process, a pressure relief ball valve can be closed, water is suppressed, the drainage pressure is examined, and when the threshold value is exceeded, the pressure relief ball valve is automatically opened to drain water. If active pressure relief is adopted, a water draining device is fixed, and a pressure relief ball valve is opened to conduct active water draining; if passive pressure relief is adopted, the water pressure for opening the pressure relief ball valve is set, and when the water pressure measured by the pressure gauge exceeds a threshold value, the pressure relief ball valve is automatically opened to drain water.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention is used for tunnel engineering, and can realize improvement of high-pressure water inrush caused by tunnel face excavation by utilizing a guide fixing system, a combined filtering system and a pipe orifice water draining system through the steps of guide pressing-in, reverse stabbing, expansion fixing, reverse gravel filtering, combined filtering, automatic pressure relief and the like, thereby preventing and controlling the conditions of flowing soil and flowing sand caused by permeation damage until collapse and mud gushing occur, and having great significance for realizing high-pressure tunnel pressure relief water draining, tunnel engineering safe construction and deformation control.
2. The gravel-attached film bag with the multilayer gravel-attached film bag comprises a gravel-attached film bag body and a filter layer, wherein the gravel-attached film bag body is made of a soil common fabric or geotextile, the inner part of the gravel-attached film bag body is provided with the inverted filter layer, and the silt in water can be effectively prevented from blocking openings in the side wall of the filter pipe through multilayer filtration, so that the underground water can be smoothly discharged, the problems of mud burst instability and the like caused by water drainage in tunnel excavation are solved, and the gravel-attached film bag is particularly suitable for the treatment of loose surrounding rock mud burst water gushing of a high-water-pressure tunnel.
3. According to the invention, the reverse thorn wing part extends into the soil body to penetrate into the soil body after extending into the soil body to a specified position, the reverse glue sleeve slowly opens under the action of water pressure to form a local umbrella-shaped water stop body with the reverse thorn wing part so as to reduce the flow velocity of water flow, and the expansion anchoring part is driven into the soil body to expand and fix, so that the effective fixation of the water drainage device is realized, and the device is prevented from falling off in the use process so as to cause safety accidents. In addition, a pipe orifice stopping rubber sleeve is further arranged to prevent water leakage possibly existing at the flange.
4. The invention is provided with the guide head, so that the guide head can be conveniently inserted into a soil body and is convenient to use; the filtering pipe is formed by connecting a plurality of sections of floral pipes, the production of floral pipes with the same specification can be carried out during production, and the number of the connected sections is flexibly selected according to the requirement to adjust the overall length during use, so that the industrial production and the real-time adjustment are facilitated; the hammering pad is arranged to protect the device from being damaged during installation and use, and the practicability of the device is improved.
5. The common arrangement of pressure gauge and pressure release ball valve can be as required manual or automatic control sluicing, can prevent drainage excessive and the latent geological disasters and the environmental destruction that cause.
Drawings
FIG. 1 is a schematic view of a water discharge device according to the present invention;
FIG. 2 is a schematic cross-sectional view of a multi-layered bag with a gravel film of the present invention;
FIG. 3 is a schematic top view of a filter tube junction according to the present invention;
FIG. 4 is a schematic structural view of a filter tube according to the present invention;
FIG. 5 is a schematic diagram of the working principle of the present invention;
in the figure: 11-a guide head; 12-barbed wing sections; 13-reverse rubber sleeve; 14-a fixing bolt; 21-a filter tube; 22-multilayer gravel-film bag; 23-a steel ring; 24-steel sheets; 25-an inverted filter layer; 26-a snap-lock connection; 31-solid wall drain pipes; 32-flange plate; 33-an expansion anchor; 34-a pressure gauge; 35-pressure relief ball valve; 36-stopping rubber sleeve of pipe orifice; 37-hammer pad.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
Example 1
A combined membrane bag type gravel pasting filtering drainage device for a high-water-pressure tunnel is shown in figure 1 and comprises a guide fixing system, a combined filtering system and a pipe orifice drainage system; the guide fixing system is arranged on the combined filtering system, is used for guiding when the device is installed and is fixed after the device is installed; the combined filtering system comprises a filtering pipe 21, a plurality of gravel-attached film bags 22 and a reverse filtering layer 25, wherein the reverse filtering layer 25 is filled in the gravel-attached film bags 22, and the gravel-attached film bags 22 are attached to the outer wall of the filtering pipe 21; one end of the pipe orifice water drainage system is fixedly connected with the tail end of the filter pipe 21 and used for draining water.
More specifically, in the present embodiment:
the filtering pipe 21 is a long-strip pipeline formed by connecting a plurality of perforated pipes with screw threads on the side wall, the perforated pipes are manufactured according to the standardized requirement and are of uniform size, so that the number of the connected perforated pipes can be adjusted according to the actual situation on site to adjust the length of the filtering pipe 21. The outside of the filter pipe 21 is covered with a multi-layer gravel-attached film bag 22, the multi-layer gravel-attached film bag 22 is made of geotextile or geotextile, and the inside is filled with a reverse filter layer 25 which forms gravel attachment together with the geotextile or geotextile to play a role in filtering. The inner part of the multi-layer gravel-attached film bag 22 is filled with a reverse filter layer 25, the reverse filter layer 25 is multi-layer gravel filled in the multi-layer gravel-attached film bag 22 according to the gradation of reverse filtration, and the reverse filter layer mainly plays a role in filtering and preventing sediment in water from blocking the open holes on the filter pipe 21. The threaded connection part of the two flower tubes of the filter tube 21 is fixed through a steel ring 23, a steel sheet 24 and a locking connecting piece 26, as shown in fig. 2-4, the steel ring 23 is in a semi-circular shape and is arranged at the threaded connection part of the filter tube 21 in pairs to form a complete circular ring, the steel sheet 24 is also axially arranged at the threaded connection part of the filter tube 21, the steel ring 23 and the steel sheet 24 jointly form the top surface and the bottom surface of the multi-layer gravel-attached membrane bag 22 and the segmented connection of the filter tube 21, and the steel ring 23 and the steel sheet 24 are fixed at the outer side of the multi-layer gravel-attached membrane bag 22 through the locking connecting piece 26, so that the whole system can be combined.
The front end of the filter pipe 21 is provided with a guide head 11, the front end of the guide head 11 is a tip, in the embodiment, the guide head 11 is arranged to be conical so as to ensure sufficient breaking capacity and strength and facilitate positioning and pressing in a rock layer in front of the tunnel face. On the outside of the multi-layered gravel pack bag 22 are provided barbed wings 12, the front ends of these barbed wings 12 pointing towards the end of the device, opposite to the overall direction of advance, and are therefore referred to as barbed wings 12. The barb-resisting wing part 12 is symmetrically arranged on the outer side of the multilayer gravel film bag 22 in pairs through the fixing bolts 14, and when the barb-resisting wing part 12 is used, the barb-resisting wing part 12 only extends out to pierce a soil body after the guide head 11 is positioned and inserted into a certain position of a front rock-soil layer, so that the barb-resisting pulling-preventing effect is achieved. Be provided with reverse gum cover 13 on the surface of anti-alar part 12 of stinging, reverse gum cover 13 opens under hydraulic effect, forms umbelliform stagnant water body with anti-alar part 12 of stinging, can reduce the velocity of flow, and then can prevent that this device from being washed down under the condition that rivers are urgent, avoids the emergence of incident.
The end of the filter pipe 21 is fixedly connected with a solid wall drain pipe 31, in this embodiment, the two pipes are fixedly connected by welding, the other end of the solid wall drain pipe 31 is fixedly connected with the front end of the pipe orifice section by a flange plate 32, water enters the filter pipe 21 after passing through the multi-layer gravel-attached film bag 22 and the inverted filter layer 25, and flows out of the device from the end of the pipe orifice section after passing through the solid wall drain pipe 31 along the filter pipe 21. The expansion anchor 33 is driven into the soil body through the space on the flange 32 and is fixed by expansion, and in the embodiment, the expansion anchor 33 is an expansion screw. A ring of nozzle stop rubber sleeve 36 is arranged at the intersection of the solid wall drain pipe 31 and the flange 32, so that water entering the solid wall drain pipe 31 can be prevented from flowing out from a connected gap. A pressure gauge 34 and a pressure relief ball valve 35 are arranged in the pipe orifice section, the pressure gauge 34 monitors the water pressure flowing through the pipe orifice section in real time, and the pressure relief ball valve 35 can manually open water drainage or automatically open the water drainage when the measured value of the pressure gauge 34 exceeds a set threshold value. Since the groundwater is filtered in multiple layers and then enters the filter pipe 21, the water flowing out of the pipe orifice section is free of sand, i.e., does not run out of the sand. Still be equipped with hammering pad 37 at mouth of pipe section end, can effectively prevent this device from receiving destruction when inserting the soil body with the mode of artifical hammering.
The working principle of the invention is shown in fig. 5, and the specific working principle is as follows:
when a tunnel is excavated and when a spot appears on the partial tunnel face, the perforated pipe is connected by screw threads to form a filter pipe 21 with required length, and a solid-wall drain pipe 31 is welded at the tail end of the filter pipe 21. The gravel-attached membrane bag 22 is filled with gravels of a certain gradation to form a reverse filter layer 25, the axial length of the gravel-attached membrane bag 22 is adjusted to be matched with the filter pipe 21, the steel rings 23 and the steel sheets 24 are axially arranged up and down, the components are fixed through the lock catch connecting piece 26 to form the gravel-attached membrane bag 22 which is wrapped outside the filter pipe 21 in a combined mode, and the gravel-attached membrane bag 22 is only applied to the section of the filter pipe 21 with holes and needing water drainage and pressure relief to form a combined filter system. A guide head 11 is arranged at the front end of the combined filtering system, a steel ring 23 is arranged at the position of a connecting combination of the sections of the perforated pipe, a barb wing part 12 is fixed on a multi-layer gravel film bag 22 on the outer layer of a filtering pipe 21 through a fixing bolt 14, and a barb sleeve 13 is wrapped on the barb wing part 12.
After the combination is completed, horizontal drilling is performed on the excavation face, the water drainage device is lifted to a specified height by using a trolley and is placed into a specified depth, the anti-puncturing wing part 12 extends out to be used for fixing and resisting to pull out, at the moment, part of the solid-wall water drainage pipe 31 enters the soil body, and the rest part of the solid-wall water drainage pipe is connected with the pipe orifice section through the flange plate 32. Under the protection of the hammering pad 37, the solid-wall drain pipe 31 is completely pushed into the soil body by external force, the flange 32 is tightly attached to the wall surface of the hole, a pipe orifice stopping rubber sleeve 36 is arranged on one side of the solid-wall drain pipe 31 of the flange 32 to prevent water leakage from the gap, and then the expansion anchoring piece 33 is driven to penetrate through the flange 32 and is expanded and fixed in the soil body. The pipe orifice section is provided with a pressure gauge 34 and a pressure relief ball valve 35 for controlling water drainage.
When a local high-pressure water bursting point or a leakage point appears on a water stop wall or a tunnel face, the guide head 11 is aligned to the water bursting point, the water bursting point is pressed into a certain depth by manual hammering or machinery, water at a high water pressure section in front of the tunnel face enters the filter pipe 21 after being filtered by the multilayer gravel film pasting bag 22 made of geotextile and the inverted filter layer 25 arranged in the multilayer gravel film pasting bag due to the action of pressure, and flows to the solid-wall drain pipe 31 and the pipe orifice section along the axial direction of the filter pipe 21, the pressure gauge 34 arranged at the pipe orifice section monitors the internal water pressure in real time, the pressure relief ball valve 35 can be closed in the underground water disposal process, water is blocked, the drainage pressure is examined, and when the threshold value is exceeded, the pressure relief ball valve 35 is automatically opened to drain water. If active pressure relief is adopted, a water draining device is fixed, and the pressure relief ball valve 35 is opened to conduct active water draining; if passive pressure release is adopted, the water pressure at which the pressure release ball valve 35 is opened is set, and when the water pressure measured by the pressure gauge 34 exceeds a threshold value, the pressure release ball valve 35 is automatically opened to drain water.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111267906.6A CN113914927A (en) | 2021-10-29 | 2021-10-29 | A combined membrane bag type gravel filtration and drainage device for high water pressure tunnels |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111267906.6A CN113914927A (en) | 2021-10-29 | 2021-10-29 | A combined membrane bag type gravel filtration and drainage device for high water pressure tunnels |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113914927A true CN113914927A (en) | 2022-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111267906.6A Pending CN113914927A (en) | 2021-10-29 | 2021-10-29 | A combined membrane bag type gravel filtration and drainage device for high water pressure tunnels |
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| CN212958756U (en) * | 2020-07-15 | 2021-04-13 | 中铁十八局集团有限公司 | Intelligent water drainage pressure reducing device for water-rich tunnel |
| CN213114686U (en) * | 2020-05-25 | 2021-05-04 | 中国建筑西南勘察设计研究院有限公司 | Sluicing device suitable for foundation ditch lateral wall |
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| CN102002959A (en) * | 2010-12-21 | 2011-04-06 | 上海广联建设发展有限公司 | Draining device of underground structure foundation and layout method thereof |
| CN106545025A (en) * | 2017-01-10 | 2017-03-29 | 陈剑 | A kind of apparatus and method for being adapted to the routed sand quick drainage of sand bed water burst |
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Application publication date: 20220111 |