CN111810234A - Tunnel water seepage and harmful gas discharge structure and semi-closed ice filling drilling construction method - Google Patents
Tunnel water seepage and harmful gas discharge structure and semi-closed ice filling drilling construction method Download PDFInfo
- Publication number
- CN111810234A CN111810234A CN202010700827.9A CN202010700827A CN111810234A CN 111810234 A CN111810234 A CN 111810234A CN 202010700827 A CN202010700827 A CN 202010700827A CN 111810234 A CN111810234 A CN 111810234A
- Authority
- CN
- China
- Prior art keywords
- water
- section
- tunnel
- pipe
- grouting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 209
- 238000005553 drilling Methods 0.000 title claims abstract description 23
- 238000010276 construction Methods 0.000 title claims abstract description 21
- 238000007569 slipcasting Methods 0.000 claims abstract description 11
- 230000008595 infiltration Effects 0.000 claims abstract description 5
- 238000001764 infiltration Methods 0.000 claims abstract description 5
- 239000007789 gas Substances 0.000 claims description 64
- 238000000034 method Methods 0.000 claims description 17
- 239000002002 slurry Substances 0.000 claims description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 7
- 239000012466 permeate Substances 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 229920001971 elastomer Polymers 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 239000011083 cement mortar Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 22
- 239000011435 rock Substances 0.000 abstract description 22
- 230000002349 favourable effect Effects 0.000 abstract description 4
- 239000003673 groundwater Substances 0.000 description 10
- 230000008569 process Effects 0.000 description 9
- 230000015572 biosynthetic process Effects 0.000 description 7
- 238000007789 sealing Methods 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011440 grout Substances 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 210000003934 vacuole Anatomy 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
-
- 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
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a tunnel water seepage and harmful gas discharge structure and a semi-closed ice filling drilling construction method. This structure can be in the drainage link effectively discharge the harmful gas in the country rock, reduces harmful gas escape or gather in a large number in the country rock, reduces the safety risk, can effectively support the stagnant water component during the slip casting, is favorable to improving slip casting pressure, promotes the negative pressure effect of the section of permeating water, is favorable to guaranteeing continuation drainage, exhaust effect, has great meaning to solving the treatment problem of tunnel infiltration, gas leakage.
Description
Technical Field
The invention relates to the technical field of tunnel engineering, in particular to a tunnel water seepage and harmful gas discharge structure and a semi-closed ice filling drilling construction method.
Background
When a waterproof layer or a lining structure of a tunnel has defects, local groundwater seepage can occur. Particularly, the water-rich tunnel has more serious water seepage, and the seepage of the tunnel wall into the tunnel can cause adverse effect on the safe operation of the tunnel, even destroy the tunnel lining concrete and the internal structure of surrounding rocks, reduce the durability of the tunnel structure and shorten the service life of the tunnel. The current common tunnel water seepage treatment method comprises the following steps: for small-area water seepage, common quick-setting materials are used for grouting and water plugging, and a transverse and annular drainage hole is adopted, and a longitudinal blind ditch is additionally arranged for drainage, or drainage is carried out by adopting a pipe-inserting pipe for punching a drainage pipe hole; for large-area water seepage, a method of grouting and water plugging is generally adopted for treating a water seepage section. But the grouting and water plugging can cause the surrounding rock groundwater to flow along the waterproof layer; meanwhile, the water seepage disposal technical method has complex working procedures and long construction period, and seriously influences the normal use of the tunnel.
Chinese patent publication No. CN107237650A proposes a tunnel water seepage negative pressure drainage technology, and its core thought is to seal the grouting section of the borehole and reserve a permeable section, and the drainage action makes the permeable section form negative pressure, forces the groundwater of the tunnel surrounding rock to flow to the borehole rapidly and discharge the earth's surface. The section of permeating water is isolated with external atmosphere, and before the drainage process took place, downthehole pressure can progressively increase along with the infiltration of groundwater, makes groundwater flow drill way naturally, and after the drainage process took place, because the drainage ability of drain pipe is greater than the flow that groundwater infiltrated the cavity of the drilling section of permeating water, can vacuole formation in the pipe of permeating water, the atmospheric pressure of cavity is less than atmospheric pressure (negative pressure promptly), therefore the pipe of permeating water around the water pipe can flow direction and permeate water the pipe. Simultaneously, because there is the negative pressure in the pipe of permeating water, the water of all directions all can flow to the pipe of permeating water around the pipe of permeating water, therefore, the drainage range can increase, and the drainage range increase more is favorable to discharging the groundwater in the tunnel country rock.
However, in the tunnel water seepage negative pressure drainage technology, in the field construction process, the lower half part of a drilled hole is a water permeable drilled section, the water permeable effect needs to be kept, the grouting for grouting the sealed drilled section cannot enter the water permeable drilled section, if the grouting pressure is high, partition structures such as an expansion rubber water stop ring and the like are often broken, and slurry enters the water permeable drilled section, so that the drilled hole is failed; if the grouting pressure is low, the effect of blocking and sealing the drilling section cannot be achieved, and the negative pressure effect cannot be formed. Therefore, a new grouting technique is required to solve the above problems.
In addition, for the gas tunnel, harmful gases such as combustible and explosive gas are often mixed in the tunnel seepage water, and the escape of the harmful gases into the tunnel threatens the operation safety of the tunnel. In the tunnel where harmful gases such as gas and carbon monoxide are enriched, the prevention and control of the harmful gases are mainly carried out by combining plugging with ventilation in the tunnel. However, only a trace amount of gas on the back of the lining escapes through permeation and a drainage structure of the existing tunnel, and a large amount of gas is actually gathered on the back of the lining, so that water pressure and gas pressure on the back of the lining rise, and potential safety hazards and even accidents are caused when the gas invades into a normal operation space of the tunnel. Gas escaping from the drainage structure of the existing tunnel is mixed with water and gas in the drainage structure, and circulates at the bottom of the tunnel along the longitudinal direction of the blind ditch, so that the risk of gas escaping is actually increased although the gas is only trace, and although the existing engineering usually utilizes a water-gas separation device to separate water from gas, the device is complex in structure and can have the problem of incomplete construction in the using process, so that the device is defective and fails.
Disclosure of Invention
The invention aims to overcome the defects that in the prior art, the negative pressure forming effect is not ideal due to the grouting problem in the scheme of draining water through negative pressure in a tunnel, and meanwhile, harmful gas escaping along a drainage structure is difficult to separate from water, the separation cost is high, the construction is complex, the operation safety risk is high, and the like, and provides a tunnel water seepage and harmful gas discharge structure and a semi-closed ice filling drilling construction method.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a tunnel infiltration holds concurrently harmful gas emission structure, contains the pipe of permeating water, the pipe of permeating water is located the section of permeating water of drilling, drilling contains the section of permeating water and slip casting section, drilling is bored from the lateral wall in tunnel and is established, it is equipped with the stagnant water component to permeate water between section and the slip casting section, it has the ice-cube to permeate water the intussuseption and fill, be equipped with the water inlet of drain pipe in the section of permeating water, the elevation of drain pipe water inlet is higher than the elevation of drain pipe delivery port, the lift of drain pipe is less than the water column height that atmospheric pressure corresponds.
The water permeable pipe is a pipe body with water permeable holes on the pipe wall.
The lift of drain pipe is less than the water column height that atmospheric pressure corresponds, promptly the drain pipe water inlet with the difference in height between the drilling drill way is less than the water column height that local atmospheric pressure corresponds to can carry out the negative pressure drainage.
By adopting the tunnel water seepage and harmful gas emission structure, the position of the drilled hole is determined according to the position and the range of the water seepage point of the tunnel wall, and the drilled hole is drilled from the side wall of the tunnel to the surrounding rock because the harmful gases such as gas, hydrogen sulfide, carbon monoxide and the like have low density and are easy to gather upwards, so that the harmful gases in the surrounding rock can be discharged during water drainage. The slip casting section can play the sealing effect, except being used for guaranteeing to form the negative pressure, can also prevent harmful gas such as gas from escaping and getting into the tunnel, forces country rock groundwater and harmful gas fast flow direction drilling and discharge the tunnel, produces the moisture separation outside the hole, and is safe more effective. The water permeable pipe is filled with ice blocks, so that during grouting, the water stopping member can be supported to a certain degree, slurry can be prevented from entering the water permeable section, the water stopping member can be prevented from being extruded to generate large displacement, meanwhile, grouting pressure can be increased, the porosity of the grouting section is reduced, a sealing effect is better played, the negative pressure effect of the water permeable section is ensured, after the ice blocks are dissolved, the tunnel structure is not influenced, when the water head height of the water inlet of the water drainage pipe is larger than the orifice height of a drill hole due to the rising of the underground water level in the tunnel surrounding rock, underground water in the water permeable section is discharged by the water drainage pipe under the action of the water head difference, and siphoning effect can be generated and negative pressure is generated in the water permeable section along with the continuous occurrence of the water drainage process, so that the underground water in the surrounding rock flows into the water permeable section at an accelerated speed, when the underground water near the drill hole is drained, the suction and drainage functions of the drainage pipe disappear, and the primary drainage process is finished; and the water drainage process is circularly and repeatedly carried out along with the rising circulation of the underground water level of the tunnel surrounding rock.
By adopting the structure, harmful gas in surrounding rocks can be effectively discharged in a drainage link, the harmful gas is prevented from escaping and entering the tunnel or being accumulated in the surrounding rocks in a large amount, the operation safety risk of the tunnel is reduced, the durability of the tunnel structure is prolonged, the water stopping component can be effectively supported during grouting, slurry is prevented from entering the water penetrating section to interfere the formation of a negative pressure environment, the blockage of the water penetrating pipe is avoided, the water stopping component is prevented from generating larger displacement due to extrusion, the grouting pressure is favorably improved, the cracks of the grouting section are reduced, the sealing effect is improved, the negative pressure effect of the water penetrating section is further improved, the sustainable drainage and exhaust effects are favorably ensured, the structure is simple, the difficulty is low, and the structure has great significance for solving the treatment problems of water seepage and gas leakage of the tunnel.
Preferably, the ice blocks are formed by injecting liquid nitrogen into the permeable section.
When the water permeable section is submerged below underground water, water in the water permeable section can be condensed to form ice blocks by filling liquid nitrogen.
Further preferably, the slurry of the grouting section is cement mortar or cement-water glass double slurry.
Preferably, the particle size of the ice blocks is 5% -10% of the pore size of the drill holes.
Preferably, the water outlet of the drain pipe is arranged in the side ditch of the tunnel or in the water tank below the outlet of the tunnel.
If the tunnel is not a gas tunnel and the discharge demand of harmful gas is not high, the water outlet of the drain pipe is arranged in a side ditch in the tunnel, and if underground water and the harmful gas need to be discharged simultaneously, the drain pipe is arranged in the water tank. The water outlet of the water drainage pipe is always below the liquid level, so that air is prevented from entering.
Preferably, the water stopping member comprises a water-swellable rubber water stop, a water stop strip or a sandbag.
Preferably, the length of the grouting section is the same as the thickness of lining concrete of the tunnel.
And if the thickness of the lining concrete of the tunnel is uncertain, the length of the grouting section is 0.5-0.6 m.
The invention also provides a semi-closed ice filling drilling construction method, which is applied to the tunnel water seepage and harmful gas discharge structure, and comprises the following steps:
a. drilling holes inclined downwards correspondingly according to the position and the range of the water seepage points on the side wall of the tunnel, and combining the position of harmful gas escape points;
b. arranging a water permeable pipe in the water permeable section of the drilled hole, and then inserting a drain pipe into the water permeable pipe;
c. filling ice blocks into the water permeable pipe, and then installing a water stopping member to block the water permeable section;
d. and (4) slurry is filled into the drilled hole to form a grouting section, so that the construction of the discharge structure is completed.
By adopting the semi-closed ice filling and drilling construction method, the drainage structure is simple and convenient to construct, the period is short, the treatment of leakage water of the existing tunnel is facilitated, the drainage structure can facilitate the discharge of harmful gas, the structure is effective for a long time, the construction difficulty is small, the ice blocks are filled in the water permeable pipe to support the water stopping component, the greater difficulty and cost are not additionally increased, the grouting pressure in the grouting link is effectively improved, the grouting efficiency is improved, the water stopping component is prevented from being damaged, the grouting effect is effectively ensured, the effective formation of a negative pressure environment is ensured, the effective operation of a drainage system is further ensured, and continuous drainage is realized.
Preferably, the downward inclination angle of the bore is 5-10 °.
Preferably, after the grouting is finished, water with the temperature of 40-50 ℃ is injected into the water permeable section through the water discharge pipe.
The melting of ice blocks is accelerated, so that underground water in surrounding rocks enters the water permeable pipe.
In summary, compared with the prior art, the invention has the beneficial effects that:
1. by adopting the tunnel water seepage and harmful gas discharge structure, harmful gas in surrounding rock can be effectively discharged in a drainage link, the harmful gas is prevented from escaping into the tunnel or being accumulated in a large amount in the surrounding rock, the safety risk of tunnel operation is reduced, the durability of the tunnel structure is prolonged, the water stop member can be effectively supported during grouting, slurry is prevented from entering the water seepage section to interfere with the formation of a negative pressure environment, the blockage of a water seepage pipe is avoided, the water stop member is prevented from generating larger displacement due to extrusion, the grouting pressure is favorably improved, the crack of the grouting section is reduced, the sealing effect is improved, the negative pressure effect of the water seepage section is further improved, the continuous drainage and exhaust effects are favorably ensured, the structure is simple and the difficulty is low, and the tunnel water seepage and harmful gas leakage treatment problem is significantly solved.
2. By adopting the semi-closed ice filling and drilling construction method, the drainage structure is simple and convenient to construct, the period is short, the treatment of leakage water of the existing tunnel is facilitated, the drainage structure can facilitate the discharge of harmful gas, the structure is effective for a long time, the construction difficulty is small, the ice blocks are filled in the water permeable pipe to support the water stopping component, the greater difficulty and cost are not additionally increased, the grouting pressure in the grouting link is effectively improved, the grouting efficiency is improved, the water stopping component is prevented from being damaged, the grouting effect is effectively ensured, the effective formation of a negative pressure environment is ensured, the effective operation of a drainage system is further ensured, and continuous drainage is realized.
Description of the drawings:
FIG. 1 is a schematic cross-sectional view of a tunnel water seepage and harmful gas discharge structure according to the present invention;
FIG. 2 is a schematic sectional view of a tunnel water seepage and harmful gas discharge structure according to the present invention.
Fig. 3 is another schematic configuration diagram of the drain pipe in embodiment 1.
The labels in the figure are: 1-permeable pipe, 21-permeable section, 22-grouting section, 23-water stopping member, 24-slurry, 3-ice block, 4-drain pipe, 5-underground water line, 6-tunnel, 61-side ditch and 62-water tank.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments. It should be understood that the scope of the above-described subject matter is not limited to the following examples, and any techniques implemented based on the disclosure of the present invention are within the scope of the present invention.
Example 1
As shown in fig. 1, a tunnel 6 has no requirement on the emission of harmful gases, and mainly aims at water seepage control, the tunnel water seepage and harmful gas emission structure provided by the invention comprises a water seepage pipe 1, wherein the water seepage pipe 1 is arranged in a water seepage section 21 of a drilled hole, the position of the drilled hole is determined according to the position of the water seepage point, the drilled hole is drilled from the side wall of the tunnel 6 in a downward inclining manner, the inclination angle between the drilled hole and the horizontal plane is 5-10 degrees, the drilled hole comprises the water seepage section 21 and a grouting section 22, the length of the grouting section 22 is the same as the thickness of lining concrete of the tunnel 6, the length of the water seepage section 21 is 5-10m, and if the thickness of the lining concrete of the tunnel 6 is uncertain, the length of the grouting section 22 is 0.5-0.6 m. Set up stagnant water component 23 between water section 21 and the slip casting section 22 of permeating water, it is equipped with pipe 1 of permeating water in the section 21 of permeating water, it is filled with solid-state ice-cube 3 to permeate water intraductal 1, be equipped with drain pipe 4's water inlet in the section 21 of permeating water, the elevation of drain pipe 4 water inlet is higher than the elevation of drain pipe 4 delivery port, drain pipe 4's delivery port is arranged in side ditch 61 in tunnel 6, drain pipe 4's delivery port should be in below the liquid level always, avoids the air admission, drain pipe 4's lift is less than the water column height that local atmospheric pressure corresponds.
Specifically, the aperture of the drilled hole is preferably larger than 70mm, the permeable pipe 1 can be a perforated corrugated pipe with externally woven filter cloth and internally supported HDPE (high-density polyethylene), large particles such as coarse sand, broken stone and the like can be prevented from entering the perforated corrugated pipe, the drain pipe 4 can be a PU (polyurethane) pipe with the pipe diameter of 4-6mm, the drain pipe 4 has good air tightness, when the water head height in the permeable section 21 is larger than the elevation of the drilled hole opening due to the rising of the underground water level in the surrounding rock, the underground water in the permeable section 21 can be discharged from the drain pipe 4 under the action of the water head difference, the drainage process occurs, the siphon action causes the permeable section 21 to generate negative pressure, the underground water in the surrounding rock is accelerated to flow to the permeable section 21, and after the surrounding rock and the underground water in the drilled hole are drained, the; as the cycle of rainfall infiltration occurs, the drainage process cycles as shown in figure 2.
The grout 24 of the grouting section 22 adopts cement mortar or cement-water glass double grout, which is beneficial to preventing harmful gas such as gas and the like from escaping into the tunnel 6, the water-stop member 23 comprises a water-swelling rubber water-stop strip, a water-stop belt or a sand bag, and after the water-stop member 23 is closed, a gap between the drain pipe 4 and the hole wall of the grouting section 22 is closed through grouting.
The water permeable pipe 1 is internally filled with the ice blocks 3 between the water permeable pipe and the water discharge pipe 4, the particle sizes of the ice blocks are 5% -10% of the pore sizes of the drilled holes, so that the water stopping members 23 are effectively supported during grouting, slurry 24 is prevented from entering the water permeable section 21, and the water stopping members 23 can be prevented from being extruded to generate large displacement. If the water permeable section 21 is submerged under groundwater, the water in the water permeable section 21 can be condensed into ice blocks by filling liquid nitrogen, and the filling of liquid nitrogen has no influence on the structure of the tunnel 6. Then over time, the ice 3 can be made to dissolve, freeing up the cavity inside the permeable tube 1 for drainage.
This structure can effectively support stagnant water component when the slip casting, prevents that the slurry from getting into the section of permeating water and disturbing the formation of negative pressure environment, avoids the jam of the pipe of permeating water, prevents that the stagnant water component from producing great displacement because of the extrusion, is favorable to improving slip casting pressure, reduces the crack of slip casting section improves and seals the effect, and then promotes the negative pressure effect of the section of permeating water, guarantees drainage system's validity and continuation, and the simple structure degree of difficulty is low, has good application prospect.
As shown in fig. 3, if the tunnel 6 is a gas tunnel, it is necessary to discharge both gas and hydrogen sulfide harmful gases, the position of the drilled hole is determined by combining the position of the harmful gas escape point, the drilled hole is drilled from the side wall of the tunnel 6 near the top in a downward inclined manner, the height difference between the bottom of the drilled hole and the hole opening is 1.5-2m, the density of the harmful gases such as gas is low, and the harmful gases are easy to gather upwards, which is beneficial to the suction and discharge of the harmful gases, and the water outlet of the water discharge pipe 4 is arranged in a water discharge structure outside the tunnel 6, such as a water tank 62 below the outlet, so as to discharge the harmful gases outside the tunnel 6, and cause the gases to be separated outside the hole, which is safer and more effective.
Example 2
The invention relates to a semi-closed ice filling drilling construction method, which adopts a discharge structure as described in embodiment 1 and comprises the following steps:
a. drilling downward inclined drill holes correspondingly according to positions and ranges of water seepage points and harmful gas escape points (if any) on the side wall of the tunnel 6;
b. arranging a permeable pipe 1 in the permeable section 21 of the drilled hole, and then inserting a drain pipe 4 into the permeable pipe 1 to ensure that the port of the drain pipe 4 extends into the bottom of the permeable pipe 1;
c. filling ice blocks 3 in the water permeable pipe 1 and compacting, and then installing a water stopping member 23 to block the water permeable section 21;
In the step d, after the grouting, water with the temperature of 40-50 ℃ can be injected into the water permeable section 21 through the water discharge pipe 4, so that the melting of ice blocks is accelerated, and the groundwater in the surrounding rock can enter the water permeable pipe 1.
The method is simple and convenient to construct, short in period, beneficial to treatment of water leakage of the existing tunnel, capable of facilitating discharge of harmful gas due to the drainage structure, long-term effective in structure and small in construction difficulty, and the water-stopping member is supported by filling ice blocks in the water-permeable pipe without additionally increasing large difficulty and cost, grouting pressure in a grouting link is effectively improved, grouting efficiency is favorably improved, water-stopping components are prevented from being damaged, grouting effect is effectively guaranteed, effective formation of a negative pressure environment is guaranteed, effective operation of a drainage system is guaranteed, and continuous drainage and exhaust are achieved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides a tunnel infiltration holds harmful gas emission structure concurrently, its characterized in that contains pipe (1) of permeating water, it locates in the section of permeating water (21) of drilling to permeate water pipe (1), drilling contains the section of permeating water (21) and slip casting section (22), the drilling is bored from the lateral wall of tunnel (6) and is established, it is equipped with stagnant water component (23) to permeate water between section (21) and slip casting section (22), it is filled with ice-cube (3) to permeate water pipe (1), be equipped with the water inlet of drain pipe (4) in the section of permeating water (21), the elevation of drain pipe (4) water inlet is higher than the elevation of drain pipe (4) delivery port, the lift of drain pipe (4) is less than the water column height that atmospheric pressure corresponds.
2. Discharge structure according to claim 1, characterized in that said ice blocks (3) are formed by injecting liquid nitrogen into said permeable section (21).
3. The drainage structure according to claim 1, characterized in that the slurry (24) of the grouting section (22) is cement mortar or cement-water glass double slurry.
4. The discharge structure according to claim 1, characterized in that the particle size of the ice cubes (3) is 5-10% of the bore hole size.
5. The drainage structure according to claim 1, characterized in that the outlet of the drain pipe (4) is placed in a lateral gutter (61) of the tunnel (6) or in a water trough (62) below the tunnel (6) outlet.
6. The drainage structure according to any one of claims 1 to 5, wherein the water stopping member (23) comprises a water-swellable rubber water stop, a water stop tape or a sandbag.
7. The discharge structure according to any one of claims 1 to 6, wherein the length of said grouting section (22) is the same as the thickness of the lining concrete of said tunnel (6).
8. A semi-closed ice-filling drilling construction method, which is characterized in that the tunnel water seepage and harmful gas discharge structure according to any one of claims 1 to 7 is applied, and comprises the following steps:
a. drilling holes inclined downwards correspondingly according to the position and the range of the water seepage points on the side wall of the tunnel (6);
b. arranging a water permeable pipe (1) in the water permeable section (21) of the drilled hole, and then inserting a drain pipe (4) into the water permeable pipe (1);
c. filling ice blocks (3) into the water permeable pipe (1), and then installing a water stopping component (23) to plug the water permeable section (21);
d. and (3) injecting slurry (24) into the drill hole to form a grouting section (22) so as to finish the construction of the discharge structure.
9. The method of claim 8, wherein the angle of inclination of the drill hole downward is 5-10 °.
10. The construction method according to claim 8, further comprising injecting water of 40-50 ℃ into the water permeable section (21) through the drain pipe (4) after the grouting is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010700827.9A CN111810234B (en) | 2020-07-20 | 2020-07-20 | Tunnel water seepage and harmful gas discharge structure and semi-closed ice filling drilling construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010700827.9A CN111810234B (en) | 2020-07-20 | 2020-07-20 | Tunnel water seepage and harmful gas discharge structure and semi-closed ice filling drilling construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111810234A true CN111810234A (en) | 2020-10-23 |
| CN111810234B CN111810234B (en) | 2021-06-29 |
Family
ID=72865852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010700827.9A Active CN111810234B (en) | 2020-07-20 | 2020-07-20 | Tunnel water seepage and harmful gas discharge structure and semi-closed ice filling drilling construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111810234B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113295484A (en) * | 2021-04-21 | 2021-08-24 | 重庆交通大学 | Method for manufacturing concrete test piece for simulating water-containing cavity defect |
| CN113323723A (en) * | 2021-06-25 | 2021-08-31 | 中铁二院工程集团有限责任公司 | Acid-soluble drilling drainage structure for tunnel and side slope of karst or fault and construction method |
| CN113445959A (en) * | 2021-08-10 | 2021-09-28 | 中铁二院工程集团有限责任公司 | Drilling drainage structure of karst or fault tunnel and construction method and construction structure thereof |
| WO2022017226A1 (en) * | 2020-07-20 | 2022-01-27 | 中铁二院工程集团有限责任公司 | Grouting structure filled with soluble crystal and construction method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008274553A (en) * | 2007-04-25 | 2008-11-13 | Toyo Constr Co Ltd | Slope stabilizing method |
| CN107237650A (en) * | 2017-06-30 | 2017-10-10 | 浙江大学 | A kind of drilling siphon drainage system and method for being used to handle the infiltration of Tunnel wall |
| CN107246019A (en) * | 2017-06-30 | 2017-10-13 | 浙江大学 | A kind of slope underground water drilling self-starting drainage by suction system and method |
| CN111005760A (en) * | 2019-12-27 | 2020-04-14 | 中铁二院工程集团有限责任公司 | Drainage type drainage system for karst tunnel |
-
2020
- 2020-07-20 CN CN202010700827.9A patent/CN111810234B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008274553A (en) * | 2007-04-25 | 2008-11-13 | Toyo Constr Co Ltd | Slope stabilizing method |
| CN107237650A (en) * | 2017-06-30 | 2017-10-10 | 浙江大学 | A kind of drilling siphon drainage system and method for being used to handle the infiltration of Tunnel wall |
| CN107246019A (en) * | 2017-06-30 | 2017-10-13 | 浙江大学 | A kind of slope underground water drilling self-starting drainage by suction system and method |
| CN111005760A (en) * | 2019-12-27 | 2020-04-14 | 中铁二院工程集团有限责任公司 | Drainage type drainage system for karst tunnel |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022017226A1 (en) * | 2020-07-20 | 2022-01-27 | 中铁二院工程集团有限责任公司 | Grouting structure filled with soluble crystal and construction method |
| CN113295484A (en) * | 2021-04-21 | 2021-08-24 | 重庆交通大学 | Method for manufacturing concrete test piece for simulating water-containing cavity defect |
| CN113295484B (en) * | 2021-04-21 | 2024-01-26 | 重庆交通大学 | Method for manufacturing concrete test piece for simulating water-containing cavity defect |
| CN113323723A (en) * | 2021-06-25 | 2021-08-31 | 中铁二院工程集团有限责任公司 | Acid-soluble drilling drainage structure for tunnel and side slope of karst or fault and construction method |
| CN113323723B (en) * | 2021-06-25 | 2021-11-16 | 中铁二院工程集团有限责任公司 | Acid-soluble drilling drainage structure for tunnel and side slope of karst or fault and construction method |
| CN113445959A (en) * | 2021-08-10 | 2021-09-28 | 中铁二院工程集团有限责任公司 | Drilling drainage structure of karst or fault tunnel and construction method and construction structure thereof |
| CN113445959B (en) * | 2021-08-10 | 2022-02-01 | 中铁二院工程集团有限责任公司 | Drilling drainage structure of karst or fault tunnel and construction method and construction structure thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111810234B (en) | 2021-06-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111810234B (en) | Tunnel water seepage and harmful gas discharge structure and semi-closed ice filling drilling construction method | |
| CN107237650B (en) | Drilling siphon negative pressure drainage system and method for treating water seepage of tunnel wall | |
| CN105821830B (en) | A kind of anatonosis siphon drainge system for hypotonicity slight slope | |
| WO2019000776A1 (en) | Side slope underground water drilling self-starting negative pressure drainage system and method | |
| WO2019000775A1 (en) | Self-draining anchor cable system for side slope protection and construction method therefor | |
| CN109707444B (en) | Automatic start-up formula tunnel drainage system | |
| CN111794238B (en) | Grouting structure for filling soluble crystals and construction method | |
| CN109930606A (en) | Fast blockage impervious grouting construction method | |
| CN103572764A (en) | Watertight structure for retaining wall of ultra-deep manually excavated pile and construction method thereof | |
| KR100538316B1 (en) | The apparatus and method of earth grouting using compressed air system for intermittent vibrated wave production | |
| CN107245989A (en) | Bear the tunnel structure and its construction technology of external water pressure in height | |
| CN102174818A (en) | Controlled impermeable leaking stoppage grout-extruding water-stopping technology of strong water permeable stratum of quaternary system | |
| CN212506349U (en) | Water-logging well sealing device for water-lowering zone of ultra-deep foundation pit pipe well | |
| CN110821498B (en) | Safe and rapid water plugging and reinforcing method in strong water-rich soft surrounding rock of operation tunnel | |
| CN208619166U (en) | Tunnel roof waterproof flow guiding structure | |
| CN111441775B (en) | Rapid grouting arching reinforcement method before excavation of tunnel in stratum with poor groutability and difficult self-stabilization | |
| CN113279729B (en) | Gas extraction method for leaking stoppage and concentration | |
| CN210766827U (en) | Depressurization well in deep foundation pit | |
| CN112832822A (en) | Rock mass grouting reinforcement gas prevention and control method for guaranteeing safety of gas outburst tunnel | |
| CN113323723B (en) | Acid-soluble drilling drainage structure for tunnel and side slope of karst or fault and construction method | |
| CN205742148U (en) | A kind of anatonosis siphon drainge system for hypotonicity slight slope | |
| CN113445959B (en) | Drilling drainage structure of karst or fault tunnel and construction method and construction structure thereof | |
| CN217150551U (en) | One-way water guide anti-clogging drain hole structure | |
| CN218952222U (en) | Air bag well sealing device | |
| CN216950397U (en) | Concrete pouring structure for soft soil water-rich stratum freezing method contact channel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |