CN210637090U - Tunnel water-proof and drainage system - Google Patents

Abstract

The utility model discloses a tunnel water-proof and drainage system, which comprises a drainage gap, wherein the drainage gap is arranged between a front construction lining section and a rear construction lining section of a tunnel secondary lining, and the drainage gap is arranged along the circumferential direction of a tunnel arch surface; the drainable water stop belt is embedded into the back surface of the drainage gap, the drainable water stop belt is annularly arranged along the drainage gap, and two ends of the drainable water stop belt extend into the side ditch of the tunnel; two ends of the transverse drain pipe are respectively communicated with two ends of the drain gap, and the central drain pipe is communicated with the transverse drain pipe; the utility model discharges underground seepage water in the drainage section through the drainage gap, reduces the water pressure of the secondary lining of the tunnel, and improves the waterproof capability of the waterproof section; the underground water seepage is limited in the water drainage gap through the water-stop belt capable of draining water, so that the channeling of the underground water seepage or the entering of the underground water seepage into the tunnel is avoided; the utility model can conveniently clean the deposit in the drainage gap in time; the drainage waterstop is externally attached to the surface of the tunnel lining, so that the tunnel lining is convenient to overhaul and replace.

Description

Tunnel water-proof and drainage system

Technical Field

The utility model relates to a drainage technical field is prevented in the tunnel, in particular to drainage system is prevented in tunnel.

Background

With the continuous enlargement of the scale of the traffic transportation road network, the number of tunnel projects is also continuously increased; the tunnel is built under the ground surface and is surrounded by various underground water, and the underground water cannot enter the tunnel without holes; the work of each link in the process of tunnel survey, design, construction and operation is possible to have the condition of not in place, thereby causing any defect of the tunnel water-proof and drainage system and possibly causing the water leakage of the tunnel. At present, China has the capability and experience of building underground projects such as large tunnels, however, from the perspective of underground structure waterproofing, although design is considered, the total waterproof effect is not ideal. So far, most tunnels operated by passing through the vehicle in China have the problem of water leakage of lining structures, and the water leakage condition of some tunnels is quite serious, so that the water leakage becomes one of the common disease problems during the operation of highway tunnels.

At present, tunnel drainage mainly comprises: water enters an annular drainage blind ditch at the back of the lining from a surrounding rock crack, a longitudinal drainage pipe arranged at the lower part of the side wall of the lining is connected downwards to the annular drainage pipe, then the water in the longitudinal drainage pipe is guided into a central drainage pipe through a transverse water guide pipe, and finally the central drainage pipe discharges the water out of the hole. Drainage systems used in current tunnels have a number of problems: firstly, investigation on an operated tunnel shows that the water leakage problem of different degrees can occur in the water prevention and drainage system after being applied for several years, so that the tunnel structure is deteriorated, and the long-term safety of the tunnel is influenced; secondly, corrosive components are possibly mixed in the tunnel leakage water, and the tunnel leakage water can cause serious damage to the strength of the tunnel secondary lining after being acted on the tunnel secondary lining for a long time, so that the normal service life of a tunnel structure is influenced; in addition, tunnel percolating water also can influence the driving safety in tunnel, for example surface ponding or freeze and all can make the coefficient of friction between wheel and the ground reduce, probably make the vehicle take place to sideslip, and the car is gone in such tunnel and is not only influenced driving speed, still can produce serious potential safety hazard. The water leakage of the tunnel can also cause certain erosion to ventilation equipment, communication equipment, power supply and lighting equipment, fire-fighting pipeline equipment and the like in the tunnel, and finally cause the operation equipment to be in fault or even damaged; with the current construction process of the tunnel water-proof and drainage system, if the tunnel water-proof and drainage system has the problem of water leakage, the place where the tunnel water leakage occurs is difficult to be cleared, or the water-proof and drainage component is replaced, the maintenance-reachable water-proof and drainage system cannot be realized, and the difficulty and the maintenance cost of maintenance during the operation of the tunnel are increased.

SUMMERY OF THE UTILITY MODEL

Aiming at the technical problems in the prior art, the utility model aims to provide a tunnel water-proof and drainage system, which solves the problems that the internal drainage pipe of the existing tunnel water-proof and drainage system is easy to block and is inconvenient to check or replace; good water-proof and drainage effect and long service life.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a tunnel water-proof and drainage system, which comprises a drainage gap, a drainable water stop, a transverse drainage pipe and a central drainage pipe, wherein the drainage gap is arranged between a front construction lining section and a rear construction lining section in a tunnel secondary lining, and the tunnel secondary lining is divided into a waterproof section and a drainage section through the drainage gap; the drainage gaps are arranged along the arch surface of the tunnel in the circumferential direction; the drainable water stop belt is embedded into the back surface of the drainage gap, the drainable water stop belt is annularly arranged along the drainage gap, and two ends of the drainable water stop belt extend into side ditches at two sides of the tunnel; the transverse drainage pipe is transversely arranged in the inverted arch of the tunnel, and two ends of the transverse drainage pipe are respectively connected with the side ditches at two sides of the tunnel; the central drain pipe is arranged along the length direction of the tunnel and is communicated with the transverse drain pipe.

Furthermore, water catchment grooves are respectively arranged in side ditches at two sides of the tunnel, and the upper parts of the water catchment grooves are communicated with the drainage gaps; the bottom of the water collecting groove is communicated with a transverse water drainage pipe.

Furthermore, the transverse drain pipe is an arc-shaped drain pipe, the lowest point of the arc-shaped drain pipe is arranged on the central line of the tunnel bottom plate, the central drain pipe is arranged at the lowest point of the transverse drain pipe, the central drain pipe is obliquely arranged in the length direction, and the oblique direction is matched with the longitudinal slope direction of the tunnel bottom plate.

Furthermore, the drainage gap is a construction gap, a settlement gap or a deformation gap of the secondary lining of the tunnel.

Furthermore, a waterproof plate and geotextile are sequentially arranged on the upstream surface of the secondary lining of the tunnel; the waterproof plates are arranged at the drainage gap in a segmented manner, the two waterproof plates on the two sides of the drainage gap extend into the drainage gap and are respectively attached to the gap walls on the two sides of the drainage gap, and a drainage channel is reserved between the two waterproof plates; the geotextile is arranged on the upstream face of the waterproof board and clings to the primary support.

Furthermore, the water stop belt capable of draining water comprises a drainage box and a drainage groove, wherein the drainage box is fixedly arranged on the back surface of the drainage gap and is of a concave groove structure; the concave surface of the drainage box is the upstream surface, and the drainage groove is fixedly arranged on the upstream surface of the drainage box; one end of the drainage groove is fixedly connected with the drainage box, the other end of the drainage groove is embedded into the drainage gap, and two side walls of the drainage groove are tightly attached to two side gap walls of the drainage gap respectively.

Furthermore, the section of the drainage groove is of a semi-arc or V-shaped structure; the bottom arc surface of the semi-circular arc structure is fixedly connected with the drainage box, and two side walls of the semi-circular arc structure are respectively and tightly attached to the gap walls at the two sides of the drainage gap; the bottom of the V-shaped structure is fixedly connected with the drainage box, and two side wall ends of the V-shaped structure are tightly attached to two side gap walls of the drainage gap respectively.

Furthermore, the tail ends of two side walls of the drainage groove are respectively provided with a clamping section, and the clamping sections are tightly attached to the drainage gap; the distance between the two clamping sections is larger than the seam width of the drainage seam; the joint section adopts the wedge structure, and the joint section is the main aspects with the link of water drainage tank, and the free end of joint section is the tip.

Furthermore, two side walls of the drainage box are respectively provided with a flange plate; one flange plate is fixedly connected with the front construction lining section, and the other flange plate is fixedly connected with the rear construction lining section.

Furthermore, mounting grooves are formed in the surfaces of the front construction lining section and the rear construction lining section, and the flange plates are embedded into the mounting grooves; the flange plate is fixedly connected with the mounting groove through a bolt; the installation groove is internally provided with a sealing body used for sealing and arranging the flange plate in the installation groove; the sealing body is a chemical sealing glue which adopts acrylate sealing glue or polysulfide sealing glue.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides a tunnel water-proof and drainage system, through setting up the drainage gap between the preceding construction lining in tunnel secondary lining and the back construction lining section, divide tunnel secondary lining into drainage district section and waterproof district section, the underground infiltration discharges through the drainage gap in drainage district section, has reduced tunnel secondary lining's water pressure, has improved the waterproof ability of waterproof district section; by arranging the drainable water stop belt, the underground water seepage is limited in the drainage gap, and the phenomenon that the underground water seepage has a cross flow or enters the inside of the tunnel to influence the normal use of the tunnel is avoided; the utility model can conveniently clean the sediment in the drainage gap in time, and avoid the blockage of the tunnel drainage system; the waterproof and drainage effect is good, and the service life is longer; the drainage waterstop is externally attached to the surface of the tunnel lining, so that the tunnel lining is convenient to overhaul and replace.

Furthermore, through set up catchment groove in tunnel both sides side ditch, realized gathering underground infiltration after gathering through drainable waterstop to the tunnel vault and to the underground infiltration that the tunnel waist flows out through the drainage gap, ensure that the tunnel is discharged after gathering completely of drainage district department underground infiltration.

Furthermore, the transverse drain pipe is an arc-shaped drain pipe, and a height difference is arranged between a water inlet and a water outlet of the transverse drain pipe, so that the underground water seepage can be smoothly discharged through the transverse drain pipe, and the underground water seepage is prevented from flowing backwards into the tunnel.

Furthermore, the drainage gap is a construction gap, a settlement gap or a deformation gap, so that the construction is convenient, the construction period is not occupied, and the construction cost is low.

Furthermore, by arranging the geotextile, the filtering of the water seepage of the surrounding rock of the tunnel is realized, and impurities are prevented from entering a drainage gap and blocking the drainage gap; the waterproof boards are arranged in sections, and are completely laid in the waterproof sections, so that the waterproof effect is achieved, and the water discharge is limited; at the drainage zone section, form drainage channel between the waterproof board, realized the emission of limiting quantity to water, guarantee that tunnel drainage system integrality and leakproofness are just, satisfy waterproof and drainage requirement simultaneously.

Furthermore, by embedding the drainage grooves into the drainage gaps, the underground seepage water flowing out of the drainage gaps is collected through the drainage grooves, and the collected underground water is drained into the transverse drainage pipe and then flows into the central drainage pipe until being drained out of the tunnel; the drainage box is used as a secondary water-proof and drainage barrier, when a small amount of leakage water exists between the drainage groove and the drainage gap, the leakage water enters the drainage box through the gap between the drainage groove and the drainage gap, the drainage box is used for secondarily collecting the leakage water and discharging the leakage water, and the leakage water is prevented from entering the tunnel.

Furthermore, the drainage groove is set to be of a semi-circular arc structure or a V-shaped structure, so that the sealing connection between the drainage water stop and a drainage gap is ensured, and the cross flow of underground water seepage in the drainage section is avoided.

Furthermore, by arranging the clamping section, the sealing property between the drainage groove and the drainage gap is improved, and underground seepage water flowing out of the drainage gap is ensured to be completely collected in the drainage groove, so that the underground seepage water is drained; the clamping section is set to be of a wedge-shaped structure, smooth connection between the clamping section and a drainage gap is improved, and underground water collection is guaranteed.

Furthermore, through setting up the flange board, improved the sealed of drainage box with the lining cutting, avoided in the secret infiltration gets into the tunnel.

Further, the sealing body is adopted to seal the flange plate, so that secondary sealing of the drainable water stop belt is realized; when the chemical sealant is used for sealing, the sealing performance is good; when needing the maintenance to change, only need adopt machinery or chemical mode chisel to remove the back, demolish the bolt, can realize dismantling the waterstop that can drain, the maintenance change mode is simple.

Drawings

Fig. 1 is a schematic view of the overall structure of a tunnel water-proof and drainage system according to the present invention;

fig. 2 is a schematic partial cross-sectional view of a tunnel waterproof and drainage system according to the present invention;

fig. 3 is a schematic view of the overall structure of a drainable water stop in a tunnel water-proof and drainage system according to the present invention;

fig. 4 is a schematic cross-sectional view of a drainable water stop in a tunnel water-proof system according to the present invention;

fig. 5 is a schematic view of an installation structure of a drainable water stop in a tunnel water-proof and drainage system according to the present invention;

fig. 6 is an enlarged schematic view of a catchment groove structure in the tunnel water-proof and drainage system of the present invention.

Wherein, 1 is a drainage gap, 2 is a drainage water stop, 3 is a transverse drainage pipe, 4 is a central drainage pipe, 5 is a catchment groove, 6 is a waterproof board, 7 is geotextile, 8 is a front construction lining section, 9 is a rear construction lining section, 10 is tunnel surrounding rock, 11 is a tunnel invert, and 12 is a primary support; 21 drainage boxes, 22 drainage grooves, 23 clamping sections, 24 flange plates, 25 bolts and 26 sealing bodies.

Detailed Description

The technical solutions of the embodiments of the present invention are explained and explained below with reference to the drawings of the embodiments of the present invention, but the embodiments described below are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the embodiment, other embodiments obtained by those skilled in the art without any creative work belong to the protection scope of the present invention.

As shown in the attached drawings 1-2 and 6, the utility model provides a tunnel water-proof and drainage system, which comprises a drainage gap 1, a drainable water stop 2, a transverse drainage pipe 3, a central drainage pipe 4, a catchment groove 5, a waterproof board 6 and a geotextile 7; the drainage gap 1 is arranged between a front construction lining section 8 and a rear construction lining section 9 in the tunnel secondary lining, the tunnel secondary lining is divided into a waterproof section and a drainage section through the drainage gap 1, and the drainage gap 1 is annularly arranged along the tunnel arch surface; the drainable water stop 2 is embedded in the back surface of the drainage gap 1, and the drainable water stop 2 is annularly arranged along the drainage gap 1; two ends of the drainable water stop 2 extend into the side ditches at two sides of the tunnel, water catchers 5 are respectively arranged in the side ditches at two sides of the tunnel, and the upper parts of the water catchers 5 are communicated with the drainage gaps 1; the transverse drain pipe 3 is transversely arranged in the tunnel inverted arch 11, and the position of the transverse drain pipe 3 is matched with that of the drain gap 1; the transverse drain pipe 3 is an arc-shaped drain pipe, the lowest point of the arc-shaped drain pipe is arranged on the central line of the tunnel bottom plate, and two ends of the arc-shaped drain pipe are respectively communicated with the water catchment grooves 5 on two sides; the central drain pipe 4 is arranged along the length direction of the tunnel and is arranged at the lowest point of the transverse drain pipes 3, and the central drain pipe 4 is communicated with the transverse drain pipes 3; the seepage water in the tunnel surrounding rock 10 flows into the drainage gap 1, is collected by the drainable water stop 2, is discharged into the water collection tank 5, and then flows into the central drainage pipe 4 through the transverse drainage pipe 3 to be discharged out of the tunnel; set up the slope setting on the 4 length direction of central drain pipe, the inclination of central drain pipe 4 suits with the tunnel bottom plate slope, and the water of being convenient for is through central drain pipe 4 discharge outside the tunnel.

The drainage gap 1 is a construction gap, a settlement gap or a deformation gap of the secondary lining of the tunnel, a drainage section is formed at the position with the drainage gap 1, a waterproof section is formed at the position without the drainage gap 1, and a waterproof plate 6 and geotextile 7 are sequentially arranged on the upstream surface of the secondary lining of the tunnel; when the waterproof board 6 is arranged, the waterproof board is arranged in sections according to the length of each waterproof and drainage subarea; in the waterproof section, the waterproof board is normally lapped and laid according to the standard; in the drainage section, the waterproof plates 6 are arranged in sections at the drainage gap 1, two waterproof plates 6 on two sides of the drainage gap 1 extend into the drainage gap 1, the waterproof plates 6 on two adjacent construction lining sections are respectively attached to the gap walls on two sides of the drainage gap 1, a drainage channel is reserved between the two waterproof plates 6, and therefore water seeping from the tunnel surrounding rock penetrates through the geotextile and enters the drainage channel to form a waterproof and drainage partition; the geotextile 7 is tightly attached to the primary support 12, and by arranging the geotextile 7, the water seepage of the tunnel surrounding rock is filtered, so that impurities are prevented from entering the drainage gap 1 and blocking the drainage gap 1.

As shown in fig. 3-5, the drainable water stop 2 of the present invention includes a drainage box 21, a drainage groove 22, a clamping section 23, a flange plate 24, a bolt 25 and a sealing body 26; the drainage box 21 is arranged on the back surface of the drainage gap 1, the drainage box 21 is of a concave groove structure, and the concave surface of the drainage box 21 is the upstream surface; the drainage channel 22 is fixedly arranged on the upstream surface of the drainage box 21, one end of the drainage channel 22 is fixedly connected with the drainage box 21, and the other end of the drainage channel 22 is embedded in the drainage gap 1; the section of the drainage channel 22 is of a semi-arc structure or a V-shaped structure; when a semi-arc structure is adopted, the bottom arc surface of the semi-arc structure is fixedly connected with the drainage box 21, the side walls of two ends of the semi-arc structure are respectively and tightly attached to the gap wall of the drainage gap 1, and the waterproof plate 6 is arranged between the drainage groove 21 and the drainage gap 1; the tail ends of two side walls of the semi-arc structure are respectively provided with a clamping section 23, the two clamping sections 23 are respectively tightly attached to the gap wall of the drainage gap 1, and the waterproof plate 6 is fixedly clamped between the drainage water stop 2 and the tunnel secondary lining; the clamping section 23 is of a wedge-shaped structure, the connecting end of the clamping section 23 and the drainage groove 22 is a large end, and the free end of the clamping section 23 is a small end, so that the smooth connection between the gap wall of the drainage gap 1 and the drainage groove 22 is realized; two joint sections 23 keep away from the slope of the centre of a circle of half-circular arc structure and set up, and the distance between two joint sections 23 is greater than the seam width of drainage gap 1, has guaranteed the leakproofness between water drainage tank 21 and the drainage gap 1. When a V-shaped structure is adopted, the bottom of the V-shaped structure is fixedly connected with the drainage box 21, and two side walls of the V-shaped structure are respectively and tightly attached to the two side gap walls of the drainage gap 1; the distance between the ends of the two side walls of the V-shaped structure is larger than the width of the drainage gap 1, so that the tightness between the drainage groove 22 and the drainage gap 1 is ensured.

Two side walls of the drainage box 21 are respectively provided with flange plates 24, wherein one flange plate 24 is fixedly connected with the front construction lining section 8, and the other flange plate 24 is fixedly connected with the rear construction lining section 9; mounting grooves are formed in the surfaces of the front construction lining section 8 and the rear construction lining section 9; the flange plate 24 is embedded in the mounting groove and is fixedly connected with the mounting groove through a bolt 25; a sealing body 26 is arranged in the mounting groove for sealing, so that the flange plate 24 is in sealing connection with the mounting groove; the sealing body 26 is made of chemical sealant, and after the flange plate 24 is installed, the chemical sealant is poured into the installation groove, so that the sealing connection between the flange plate 24 and the installation groove is ensured, and the secondary sealing fixation of the drainable water stop is realized; the chemical sealant is acrylate sealant or polysulfide sealant.

The drainage box 21, the drainage channel 22, the clamping section 23 and the flange plate 24 are all made of rubber, steel wire meshes are arranged in the drainage channel 22 and the clamping section 23, the rigidity of the drainage channel 22 and the clamping section 23 is improved, and the drainage channel 22, the clamping section 23 and the drainage gap 1 are ensured to be in sealing connection. Preferably, the drain box 21, the drain groove 22, the clamping section 23 and the flange plate 24 are of an integral structure.

Construction scheme and waterproof and drainage principle

The utility model relates to a tunnel side drainage system's construction method, including following step:

step 1, erecting a mold, assembling a secondary lining trolley and pouring a secondary lining of the tunnel; when a front construction lining section of a drainage section is poured to a last mold lining, a circumferential steel bar or rubber strip is fixedly installed in a position 1-2cm away from the end part of a drainage gap 1 inside one side of a two-lining trolley close to the drainage gap 1 to be constructed, the cross section of the circumferential steel bar or rubber strip is a square with the side length of 1cm, after the pouring of the front construction lining section is finished, the circumferential steel bar or rubber strip is removed, and a mounting groove is formed in the back water surface of the front construction lining section;

step 2, after the maintenance work of the front construction lining section is finished, bending the waterproof plate 6 on one side of the front construction lining section, and enabling the waterproof plate to be attached to the lining wall of the front construction lining section;

step 3, repeating the steps 1 and 2, and constructing a lining section after pouring; specifically, before the construction of the rear construction lining section, reserving a 2cm drainage gap between the rear construction lining section and the front construction lining section, bending a waterproof plate with the same length as that in the step 2 on the end surface of the rear construction lining section, attaching the waterproof plate to the lining wall of the rear construction lining section, and reserving a drainage channel between the two waterproof plates; before lining of a first mold of a rear construction lining section, installing and fixing a circumferential steel bar or rubber strip at a position 1-2cm away from the end part of a drainage gap 1 in the interior of one side of a second lining trolley close to the drainage gap, wherein the section of the circumferential steel bar or rubber strip is a square with the side length of 1 cm;

step 4, after the maintenance of the front and rear construction lining sections is finished, installing a drainable water stop belt; specifically, the clamping sections of the drainable water stop are forcibly extruded towards the middle, so that the distance between the two clamping sections is smaller than the width of a drainage gap; then embedding the clamping section into a drainage gap, forcibly pushing the drainable water stop belt to make the clamping section closely attached to the gap wall of the drainage gap, and fixedly clamping the waterproof plate between the drainable water stop belt and the secondary lining; but continue to promote the drainage waterstop hard, make the flange board embedding in the mounting groove, through bolt with flange board and mounting groove fixed connection, realize the pre-fixing to whole drainage waterstop, adopt sealed glue of chemistry to fill the mounting groove sealed at last, the realization is fixed to the secondary seal of drainage waterstop.

During the use, when groundwater permeates the geotechnological cloth through gap in the tunnel country rock, through geotechnological cloth filtering action, filters impurity wherein, and the drainage channel that the waterproof board and drainage gap formed is assembled into through the waterproof board to the water that is clearer, then assembles the effect through the water drainage tank, flows in the catchment groove along drainage channel, in getting into central drain pipe through horizontal drain pipe, finally derives the tunnel.

When the drainable water stop belt needs to be maintained and replaced, the sealing body is removed in a chemical or physical chiseling mode, then the bolt is removed, and finally the drainable water stop belt is removed from the drainage gap; after the repairing is finished to be inspected, the repaired or new drainable water stop is reinstalled in the drainage gap, so that the drainable water stop can be maintained and replaced, the maintenance and replacement mode is simple, and the operation is convenient.

A drainage system is prevented in tunnel, the normal overlap joint of geotechnological cloth is laid when the construction, adopts geotechnological cloth to filter the impurity in the groundwater, guarantees that clear water flows in the horizontal drain pipe in drainable waterstop and the leading-in tunnel through hoop drainage gap position, flows in central drain pipe by horizontal drain pipe again, finally exports the tunnel with groundwater outside.

A drainage system is prevented in tunnel, the waterproof board no longer is a whole, the waterproof board is at the end in drainage gap, in the drainage gap was rolled over to drainage plate position, made it and the laminating of lining wall and fixed, left out drainage channel in the middle of making two waterproof boards. The length of the waterproof board folded to the construction joint is slightly larger than the thickness of the tunnel secondary lining, so that the waterproof board is fixed and is combined with an outer drainage component into a whole, and the tightness of the whole waterproof and drainage system is ensured.

A drainage system is prevented in tunnel, but drainage waterstop adopts the outer drainage rubber area of a band flange board. This rubber tape drainage part is half-circular arc or V type structure, and drainage part's joint section is slightly wider than the seam width in drainage gap, but the joint section of drainage waterstop and the inside metal wire net that is equipped with of water drainage tank increase its self tension, make its better with the waterproof board laminating in the installation. The drainage box in the drainable water stop can realize secondary water prevention and drainage, and the flange plate of the drainage box ensures the fixed connection of the drainable water stop

The utility model discloses a tunnel water-proof and drainage system, through the water pressure to tunnel secondary lining, infiltration volume and tunnel country rock rank to combining the control standard of water pressure and infiltration volume and the design index parameter of tunnel, confirm the water-proof and drainage subregion length of tunnel, through setting up the drainage gap, divide tunnel secondary lining into waterproof district section and drainage district section of different length, regard waterproof as the main in waterproof district section, restrict the emission of water; in the drainage zone, underground seepage water is discharged through a drainage gap, so that limited discharge is realized, the ecological environment of water resources is protected to the maximum extent, and water and soil loss is reduced as much as possible, so that the matching of the drainage quantity and the seepage quantity is realized, the resources are reasonably utilized during construction, and the construction cost is reduced. The utility model discloses well drainage waterstop can conveniently be changed, can initiatively maintain the drainage facility of each district section, and the later stage of being convenient for is clear away the drainage deposit, has solved the big problem of the tunnel percolating water problem degree of difficulty during the operation to realized that "can dimension of tunnel water drainage system can reach". The utility model discloses there is very big improvement effect to the percolating water phenomenon in tunnel, can improve tunnel overall structure's security and durability to can greatly improve the driving safety performance in the tunnel, reduce because of the restriction of percolating water to driving speed. The utility model discloses have and practice thrift construction investment and operation investment, have obvious practical value, economy and social are showing. The utility model discloses a prevent drainage system adopts the emission mode of limiting quantity of water, and waterproof district section uses waterproof emission of mainly limiting water, and the drainage district section is mainly used for limiting quantity of water to discharge, has reduced groundwater to tunnel lining's harm, can also the minimize soil erosion and water loss, guarantees that tunnel peripheral region's ecological environment avoids destroying.

A drainage system is prevented in tunnel, prevent the drainage theory based on the subregion, but set up drainage waterstop in tunnel secondary lining's construction joint, movement joint or settlement joint department, but drainage waterstop has the ageing removable characteristics of damage to cancel the longitudinal drain pipe among the current drainage system, replaced the subregion mode of installing the waterstop at present on the waterproof board, also solved the problem of preventing that drainage system inside drain pipe blocks up the inspection of being not convenient for or change.

Claims (10)

1. A tunnel water-proof and drainage system is characterized by comprising a drainage gap (1), a drainable water stop belt (2), a transverse drainage pipe (3) and a central drainage pipe (4), wherein the drainage gap (1) is arranged between a front construction lining section (8) and a rear construction lining section (9) in a tunnel secondary lining, and the tunnel secondary lining is divided into a waterproof section and a drainage section through the drainage gap (1); the water drainage gap (1) is arranged along the arch surface of the tunnel in the circumferential direction; the drainable water stop belts (2) are embedded into the back surface of the drainage gap (1), the drainable water stop belts (2) are distributed annularly along the drainage gap (1), and two ends of the drainable water stop belts (2) extend into side ditches at two sides of the tunnel; the transverse drain pipe (3) is transversely arranged in the tunnel inverted arch (11), and two ends of the transverse drain pipe (3) are respectively connected with the side ditches at two sides of the tunnel; the central drain pipe (4) is arranged along the length direction of the tunnel, and the central drain pipe (4) is communicated with the transverse drain pipes (3).

2. The tunnel water-proof and drainage system as claimed in claim 1, wherein the gutters (5) are respectively arranged in the side ditches at both sides of the tunnel, and the upper parts of the gutters (5) are communicated with the drainage gap (1); the bottom of the water collecting tank (5) is communicated with the transverse drain pipe (3).

3. The tunnel water-proof and drainage system as claimed in claim 1, wherein the transverse drainage pipe (3) is an arc drainage pipe, the lowest point of the arc drainage pipe is arranged on the central line of the tunnel bottom plate, the central drainage pipe (4) is arranged at the lowest point of the transverse drainage pipe (3), the central drainage pipe (4) is arranged in an inclined manner in the length direction, and the inclined direction is adapted to the longitudinal slope direction of the tunnel bottom plate.

4. A tunnel waterproofing and drainage system according to claim 1, wherein the drainage gap (1) is a construction, settlement or deformation gap of a secondary lining of the tunnel.

5. The tunnel water-proofing and drainage system of claim 1, wherein a waterproof plate (6) and a geotextile (7) are sequentially arranged on the upstream surface of the secondary lining of the tunnel; the waterproof plates (6) are arranged in sections at the drainage gap (1), the two waterproof plates (6) on the two sides of the drainage gap (1) extend into the drainage gap (1) and are respectively attached to the gap walls on the two sides of the drainage gap (1), and a drainage channel is reserved between the two waterproof plates (6); the geotextile (7) is arranged on the upstream face of the waterproof board (6) and is tightly attached to the primary support (12).

6. The tunnel water-proof and drainage system according to claim 1, wherein the drainable water-stop belt (2) comprises a drainage box (21) and a drainage groove (22), the drainage box (21) is fixedly arranged on the back surface of the drainage gap (1), and the drainage box (21) is of a concave groove structure; the concave surface of the drainage box (21) is the upstream surface, and the drainage groove (22) is fixedly arranged on the upstream surface of the drainage box (21); one end of the drainage groove (22) is fixedly connected with the drainage box (21), the other end of the drainage groove is embedded into the drainage gap (1), and two side walls of the drainage groove (22) are tightly attached to two side gap walls of the drainage gap (1) respectively.

7. The tunnel water-proofing and drainage system of claim 6, wherein the cross section of the drainage channel (22) is a semi-arc or V-shaped structure; wherein, the bottom arc surface of the semi-circular arc structure is fixedly connected with the drainage box (21), and two side walls of the semi-circular arc structure are respectively and tightly attached to the two side gap walls of the drainage gap (1); the bottom of the V-shaped structure is fixedly connected with the drainage box (21), and two side wall ends of the V-shaped structure are tightly attached to two side gap walls of the drainage gap (1) respectively.

8. The tunnel water-proof and drainage system as claimed in claim 6, wherein the ends of two side walls of the drainage groove (22) are respectively provided with a clamping section (23), and the clamping sections (23) are tightly attached to the drainage gap (1); the distance between the two clamping sections (23) is greater than the width of the drainage gap (1); the clamping section (23) adopts a wedge-shaped structure, the connecting end of the clamping section (23) and the drainage groove (22) is a large end, and the free end of the clamping section (23) is a small end.

9. A tunnel waterproofing and drainage system according to claim 6, wherein both side walls of the drainage box (21) are provided with flange plates (24), respectively; one flange plate (24) is fixedly connected with the front construction lining section (8), and the other flange plate (24) is fixedly connected with the rear construction lining section (9).

10. A tunnel water-proofing and drainage system according to claim 9, wherein the surfaces of the front construction lining section (8) and the rear construction lining section (9) are provided with mounting grooves, and the flange plates (24) are embedded in the mounting grooves; the flange plate (24) is fixedly connected with the mounting groove through a bolt (25); a sealing body (26) is arranged in the mounting groove and used for sealing and arranging the flange plate (24) in the mounting groove; the sealing body (26) is a chemical sealing glue which adopts acrylate sealing glue or polysulfide sealing glue.

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