CN110513130A - A tunnel waterproof and drainage system - Google Patents

Abstract

The invention discloses a tunnel waterproof and drainage system, which includes a drainage gap, which is arranged between the front construction lining section and the rear construction lining section of the secondary lining of the tunnel, and the drainage gap is arranged along the tunnel arch surface; The belt is embedded in the backwater surface of the drainage gap, and the drainable waterstop is arranged along the circular direction of the drainage gap, and the two ends of the drainable waterstop extend into the side ditch of the tunnel; Connected, the central drainage pipe is connected with the horizontal lateral drainage pipe; the present invention discharges underground seepage water through the drainage gap in the drainage section, reduces the water pressure of the secondary lining of the tunnel, and improves the waterproof ability of the waterproof section; The belt restricts the underground water seepage in the drainage gap, avoiding the channeling of underground water seepage or entering the tunnel; the invention can timely and conveniently remove the sediment in the drainage gap; the drainage waterstop is attached to the surface of the tunnel lining, which is convenient for maintenance and replace.

Description

A tunnel waterproof and drainage system

technical field

The invention relates to the technical field of tunnel waterproofing and drainage, in particular to a tunnel waterproofing and drainage system.

Background technique

With the continuous expansion of the transportation road network, the number of tunnel projects is also increasing; tunnels are built under the surface and surrounded by various groundwater, and groundwater is pervasive; tunnel survey, design, construction and operation process The work of each link may not be in place, resulting in any defect in the tunnel waterproof and drainage system, which may cause water leakage in the tunnel. Although our country has the ability and experience to build underground projects such as long tunnels, however, from the perspective of waterproofing underground structures, although the design has been considered, the overall waterproofing effect is not very satisfactory. So far, most of the tunnels that have been opened to traffic in China have the problem of water leakage in the lining structure, and some tunnels have serious water leakage, so water leakage has become one of the common problems during the operation of road tunnels.

At present, the tunnel drainage is mainly as follows: water enters the circular drainage blind ditch behind the lining from the cracks in the surrounding rock, the circumferential drainage pipe is connected to the longitudinal drainage pipe arranged at the lower part of the lining side wall, and then the water in the longitudinal drainage pipe passes through the horizontal aqueduct Into the central drain, and finally the central drain drains the water out of the hole. There are many problems in the drainage system currently used in tunnels: First, the investigation of the tunnels in operation shows that after several years of application of the waterproof and drainage system, there will be water leakage to varying degrees, which will deteriorate the tunnel structure and affect the tunnel performance. Long-term safety; second, the tunnel seepage water may be mixed with corrosive components, which will act on the secondary lining of the tunnel for a long time, which will seriously damage its strength and affect the normal service life of the tunnel structure; in addition, the tunnel seepage Water will also affect the driving safety of the tunnel. For example, water or ice on the road will reduce the friction coefficient between the wheels and the ground, which may cause the vehicle to slip. Driving in such a tunnel will not only affect the driving speed, but also cause Serious safety hazard. Leakage in the tunnel will also cause certain erosion to the ventilation equipment, communication equipment, power supply and lighting equipment, fire pipeline equipment, etc. in the tunnel, and finally cause the operation equipment to malfunction or even be damaged; the current construction technology of the tunnel waterproof and drainage system , if there is water leakage in the tunnel waterproof and drainage system, it will be difficult to clear the water leakage in the tunnel, or replace the waterproof and drainage components. The difficulty of maintenance and maintenance costs during the period.

Contents of the invention

In view of the technical problems existing in the prior art, the purpose of the present invention is to provide a tunnel waterproof and drainage system, which solves the problem that the internal drainage pipes of the existing tunnel waterproof and drainage system are easily blocked and inconvenient for inspection or replacement; the waterproof and drainage effect is good, Long service life.

In order to achieve the above object, the present invention adopts the following technical solutions:

The invention provides a tunnel waterproof and drainage system, which includes a drainage gap, a drainable waterstop, a horizontal drainage pipe and a central drainage pipe. The drainage gap is arranged between the front construction lining and the rear construction lining section in the secondary lining of the tunnel. The secondary lining of the tunnel is divided into a waterproof section and a drainage section through the drainage gap; the drainage gap is arranged along the tunnel arch surface; the drainage waterstop is embedded in the back surface of the drainage gap, and the drainage waterstop is arranged Circumferential layout, the two ends of the drainage waterstop extend to the side ditches on both sides of the tunnel; the horizontal drainage pipes are arranged horizontally in the tunnel invert, and the two ends of the horizontal drainage pipes are respectively connected to the side ditches on both sides of the tunnel; the central drainage pipe is The length direction of the tunnel is set, and the central drainage pipe is connected with the horizontal drainage pipe.

Further, catchment tanks are respectively arranged in side ditches on both sides of the tunnel, and the upper part of the catchment tanks communicates with drainage gaps; the bottom of the catchment tanks communicates with horizontal drainage pipes.

Further, the horizontal drainage pipe adopts an arc-shaped drainage pipe, the lowest point of the arc-shaped drainage pipe is set on the center line of the tunnel floor, the central drainage pipe is placed at the lowest point of the horizontal drainage pipe, and the length direction of the central drainage pipe is provided with inclined settings. , the direction of inclination is compatible with the longitudinal slope direction of the tunnel floor.

Further, the drainage gaps are construction joints, settlement joints or deformation joints of the secondary lining of the tunnel.

Further, waterproof boards and geotextiles are arranged in turn on the water-facing surface of the secondary lining of the tunnel; the waterproof boards are installed in sections at the drainage gaps, and the two waterproof boards on both sides of the drainage gaps extend into the drainage gaps and are connected with the drainage gaps respectively. The gap walls on both sides of the waterproof board are attached, and a drainage channel is reserved between the two waterproof boards; the geotextile is set on the water-facing surface of the waterproof board, and it is set close to the initial support.

Further, the drainable waterstop includes a drainage box and a drainage groove, the drainage box is fixedly arranged on the backwater surface of the drainage gap, the drainage box is a concave groove structure; the concave surface of the drainage box is the facing surface, and the drainage groove is fixedly arranged on On the water facing surface; one end of the drainage groove is fixedly connected with the drainage box, and the other end is embedded in the drainage gap, and the two side walls of the drainage groove are respectively closely attached to the gap walls on both sides of the drainage gap.

Further, the cross-section of the drainage groove is a semi-circular or V-shaped structure; wherein, the bottom circular surface of the semi-circular structure is fixedly connected with the drainage box, and the two side walls of the semi-circular structure are respectively connected to the gaps on both sides of the drainage gap. The walls are tightly fitted; the bottom of the V-shaped structure is fixedly connected to the drainage box, and the two side wall ends of the V-shaped structure are respectively closely fitted to the slit walls on both sides of the drainage slit.

Further, the ends of the two side walls of the drainage groove are respectively provided with clamping sections, which closely fit the drainage gap; the distance between the two clamping sections is greater than the width of the drainage gap; the clamping section adopts a wedge-shaped structure , the connecting end of the clamping section and the drainage groove is the big end, and the free end of the clamping section is the small end.

Further, the two side walls of the drainage box are respectively provided with flange plates; wherein, 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.

Further, the surfaces of the front construction lining section and the rear construction lining section are provided with installation grooves, and the flange plates are embedded in the installation grooves; the flange plates are fixedly connected to the installation grooves by bolts; The flange plate is sealed and arranged in the installation groove; the sealing body is a chemical sealant, and the chemical sealant is an acrylic sealant or a polysulfide sealant.

Compared with prior art, the beneficial effect of the present invention has:

The invention provides a tunnel waterproof and drainage system. By setting a drainage gap between the front construction lining and the rear construction lining section in the tunnel secondary lining, the tunnel secondary lining is divided into a drainage section and a waterproof section. The underground water seepage in the section is discharged through the drainage gap, which reduces the water pressure of the secondary lining of the tunnel and improves the waterproof capacity of the waterproof section; by setting the drainable waterstop, the underground water seepage is limited in the drainage gap, avoiding The channeling of underground seepage water or entering the tunnel will affect the normal use of the tunnel; the invention can timely and conveniently remove the sediment in the drainage gap, avoiding the blockage of the tunnel drainage system; the waterproof and drainage effect is good, and the service life is long; The outside of the hose is attached to the surface of the tunnel lining, which is convenient for maintenance and replacement.

Furthermore, by setting catchment tanks in the side ditches on both sides of the tunnel, the underground water seepage collected by the tunnel vault through the drainable waterstop and the underground seepage water flowing out of the tunnel waist through the drainage gap are realized, ensuring that the drainage section After the complete collection of underground seepage water, it will be discharged from the tunnel.

Further, the horizontal drainage pipe adopts an arc-shaped drainage pipe, and a height difference is set between the water inlet and the water outlet of the horizontal drainage pipe to ensure that the underground seepage water can be smoothly discharged through the horizontal drainage pipe, and avoid the underground seepage water from being poured into the tunnel.

Further, the drainage gaps are construction joints, settlement joints or deformation joints, which are convenient for construction, do not occupy the construction period, and have low construction cost.

Further, by installing geotextiles, the filtration of water seepage in the surrounding rock of the tunnel is realized, preventing impurities from entering the drainage gap and blocking the drainage gap; by setting waterproof boards in sections, the waterproof boards are completely laid in the waterproof section, which plays a role The function of waterproofing restricts the discharge of water; in the drainage section, drainage channels are formed between the waterproof plates, which realizes the limited discharge of water, ensures the integrity and airtightness of the tunnel waterproof and drainage system, and meets the waterproof and drainage requirements at the same time.

Further, by embedding the drainage groove in the drainage gap, the underground seepage water flowing out of the drainage gap is collected through the drainage groove, and the collected groundwater is discharged into the horizontal drainage pipe, and then flows into the central drainage pipe until it is discharged into the tunnel; the drainage box serves as the second Secondary waterproof and drainage barrier, when there is a small amount of leakage water 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, and uses the drainage box to collect the leakage water twice, And drain it, avoiding the seepage water immersion in the tunnel.

Further, by setting the drainage groove as a semi-circular arc structure or a V-shaped structure, the sealed connection between the drainable waterstop and the drainage gap is ensured, and the channeling of underground seepage in the drainage section is avoided.

Further, by setting the clamping section, the sealing between the drainage groove and the drainage gap is improved, ensuring that the underground seepage water flowing out of the drainage gap is all collected in the drainage groove, and then the underground seepage water is discharged; the clamping section is set It is a wedge-shaped structure, which improves the smooth connection between the clamping section and the drainage gap, and ensures the collection of groundwater.

Further, by setting the flange plate, the sealing between the drainage box and the lining is improved, and underground water seepage is prevented from entering the tunnel.

Further, by using the sealing body to seal the flange plate, the secondary sealing of the drainable waterstop is realized; when the chemical sealant is used for sealing, the sealing performance is good; when maintenance and replacement are required, only mechanical or After the chemical method is removed, the bolts can be removed to realize the removal of the drainable waterstop, and the maintenance and replacement method is simple.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of a tunnel waterproof and drainage system according to the present invention;

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

3 is a schematic diagram of the overall structure of a drainable waterstop in a tunnel waterproof and drainage system according to the present invention;

Fig. 4 is a schematic cross-sectional view of a drainable waterstop in a tunnel waterproof and drainage system according to the present invention;

Fig. 5 is a schematic diagram of the installation structure of a drainable waterstop in a tunnel waterproof and drainage system according to the present invention;

Fig. 6 is an enlarged schematic diagram of the structure of a water collection tank in a tunnel waterproof and drainage system according to the present invention.

Among them, 1 drainage gap, 2 drainage waterstop, 3 horizontal drainage pipe, 4 central drainage pipe, 5 sink, 6 waterproof board, 7 geotextile, 8 front construction lining section, 9 rear construction lining section, 10 tunnel enclosure rock, 11 tunnel inverted arch, 12 primary support; 21 drainage box, 22 drainage groove, 23 clamping section, 24 flange plate, 25 bolt, 26 sealing body.

Detailed ways

The technical solutions of the embodiments of the present invention will be explained and described below in conjunction with the accompanying drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, not all of them. Based on the examples in the implementation manners, other examples obtained by those skilled in the art without making creative efforts all belong to the protection scope of the present invention.

As shown in Figures 1-2 and 6, the present invention provides a tunnel waterproof and drainage system, including a drainage gap 1, a drainable waterstop 2, a horizontal drainage pipe 3, a central drainage pipe 4, a water collection tank 5, and a waterproof board 6 and geotextile 7; the drainage gap 1 is set between the front construction lining section 8 and the rear construction lining section 9 in the tunnel secondary lining, and the tunnel secondary lining is divided into a waterproof section and a drainage section through the drainage gap 1. Drainage gap 1 is set along the tunnel arch in the circumferential direction; drainable waterstop 2 is embedded in the back surface of drainage gap 1, and drainable waterstop 2 is arranged along the circumference of drainage gap 1; both ends of drainable waterstop 2 Extending to the side ditches on both sides of the tunnel, the side ditches on both sides of the tunnel are respectively provided with catchment tanks 5, and the upper part of the catchment tanks 5 communicates with the drainage gap 1; The position of the horizontal drain pipe 3 adopts an arc-shaped drain pipe, and the lowest point of the arc-shaped drain pipe is set on the center line of the tunnel floor. The water tank 5 is connected; the central drainage pipe 4 is arranged along the length of the tunnel and placed at the lowest point of the horizontal drainage pipe 3, and the central drainage pipe 4 is connected to the horizontal drainage pipe 3; after the seepage water in the tunnel surrounding rock 10 flows into the drainage gap 1, After being collected by the drainable waterstop 2, it is discharged into the sump 5, and then flows into the central drain pipe 4 through the horizontal drain pipe 3 and is discharged out of the tunnel; The angle adapts to the slope of the tunnel bottom plate, so that water is discharged outside the tunnel through the central drainage pipe 4 .

Drainage gap 1 is the construction joint, settlement joint or deformation joint of the secondary lining of the tunnel. The position with drainage gap 1 forms a drainage section, and the position without drainage gap 1 is a waterproof section. There are waterproof boards 6 and geotextiles 7; when installing waterproof boards 6, they are laid out in sections according to the length of each waterproof and drainage partition; The drainage gap 1 is arranged in sections, and the two waterproof boards 6 on both sides of the drainage gap 1 extend into the drainage gap 1, and the waterproof boards 6 on the two adjacent construction lining sections are respectively attached to the gaps on both sides of the drainage gap 1 On the wall, and a drainage channel is reserved between the two waterproof boards 6, so that the surrounding rock of the tunnel seeps through the geotextile and enters the drainage channel to form a waterproof and drainage partition; The geotextile 7 is provided to filter the seepage of the surrounding rock of the tunnel, and prevent impurities from entering the drainage gap 1 and blocking the drainage gap 1 .

As shown in accompanying drawings 3-5, the drainable waterstop 2 described in the present invention includes a drainage box 21, a drainage groove 22, a clamping section 23, a flange plate 24, bolts 25 and a sealing body 26; the drainage box 21 is arranged on the backwater surface of the drainage gap 1, the drainage box 21 is a concave groove structure, and the concave surface of the drainage box 21 is the facing surface; Fixed connection, the other end of the drainage groove 22 is embedded in the drainage gap 1; the cross section of the drainage groove 22 is a semicircular arc structure or a V-shaped structure; Fixed connection, the two end side walls of the semicircular arc structure are closely attached to the slit wall of the drainage gap 1, and the waterproof board 6 is placed between the drainage groove 21 and the drainage gap 1; the two sides of the semicircular arc structure The end of the wall is respectively provided with clamping sections 23, and the two clamping sections 23 are respectively closely attached to the gap wall of the drainage gap 1, and the waterproof board 6 is fixedly sandwiched between the drainable waterstop 2 and the secondary lining of the tunnel The clamping section 23 is a wedge-shaped structure, and 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 slit wall of the drainage gap 1 is connected smoothly with the drainage groove 22 The two clamping sections 23 are inclined away from the center of the semicircular arc structure, and the distance between the two clamping sections 23 is greater than the width of the drainage gap 1, which ensures the sealing between the drainage groove 21 and the drainage gap 1. When the V-shaped structure is adopted, the bottom of the V-shaped structure is fixedly connected to the drainage box 21, and the two side walls of the V-shaped structure are closely attached to the slit walls on both sides of the drainage gap 1; the two side walls of the V-shaped structure The distance between the ends is greater than the width of the drainage slit 1 , which ensures the tightness between the drainage groove 22 and the drainage slit 1 .

The 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; the front construction lining section 8 and the surface of the rear construction lining section 9 are provided with installation grooves; the flange plate 24 is embedded in the installation groove, and is fixedly connected with the installation groove by bolts 25; The sealing connection between the grooves; the sealing body 26 is a chemical sealant. After the flange plate 24 is installed, the chemical sealant is poured in the installation groove to ensure the sealing connection between the flange plate 24 and the installation groove. The secondary sealing and fixing of the drainable waterstop is ensured; the chemical sealant adopts acrylic sealant or polysulfide sealant.

Drain box 21, drain groove 22, clamping section 23 and flange plate 24 are all made of rubber, and steel wire mesh is arranged in drain groove 22 and clamping section 23, which improves the rigidity of drain groove 22 and clamping section 23, ensures The sealing connection between the drainage groove 22 and the clamping section 23 and the drainage gap 1 is ensured. Preferably, the drainage box 21 , the drainage groove 22 , the clamping section 23 and the flange plate 24 adopt an integrated structure.

Construction plan and principle of waterproof and drainage

A construction method of a tunnel side drainage system according to the present invention comprises the following steps:

Step 1. Set up the formwork, assemble the second lining trolley and pour the secondary lining of the tunnel; when the construction lining section before a drainage section is poured to the last mold lining, the side of the second lining trolley close to the drainage gap 1 to be constructed Inside, install and fix a hoop steel bar or rubber strip at a distance of 1-2cm from the end of the drainage gap 1. The section of the hoop steel bar or rubber strip is a square with a side length of 1cm. After the pouring of the front construction lining section is completed, remove it Circumferential steel strips or rubber strips form installation grooves on the backwater surface of the front construction lining section;

Step 2. After the maintenance work of the front construction lining section is completed, bend the waterproof board 6 on one side of the front construction lining section, and make it fit the lining wall of the front construction lining section;

Step 3, repeat steps 1 and 2, and construct the lining section after pouring; specifically, before the construction of the rear construction lining section, reserve a drainage gap of 2 cm between the rear construction lining section and the front construction lining section. The end face of the section bends the waterproof board with the same length as in step 2, and the waterproof board is attached to the lining wall of the rear construction lining section, and a drainage channel is reserved between the two waterproof boards; Before the mold lining, also install and fix a hoop steel bar or rubber strip on the side of the second lining trolley close to the drainage gap, 1-2cm away from the end of the drainage gap 1, and the cross section of the hoop steel bar or rubber strip It is a square with a side length of 1cm. After the pouring of the front construction lining section is completed, the circumferential steel strip or rubber strip is removed, and an installation groove is formed on the back water surface of the rear construction lining section;

Step 4. After the maintenance of the front and rear construction lining sections is completed, start to install the drainable waterstop; specifically, first squeeze the clamping section of the drainable waterstop to the middle to make the distance between the two clamping sections less than the width of the drainage gap; then insert the clamping section into the drainage gap, push the drainable waterstop firmly so that the clamping section fits closely with the gap wall of the drainage gap, and fix the waterproof board on the drainable stop Between the water belt and the secondary lining; continue to push the drainable waterstop hard, so that the flange plate is embedded in the installation groove, and the flange plate and the installation groove are fixedly connected by bolts to realize the protection of the entire drainable waterstop Pre-fix, and finally use chemical sealant to fill and seal the installation groove to realize the secondary sealing and fixing of the drainable waterstop.

When in use, when the groundwater penetrates into the geotextile through the gaps in the surrounding rock of the tunnel, the impurities in it are filtered out through the filtration of the geotextile, and the clearer water flows into the drainage channel formed by the waterproof board and the drainage gap through the waterproof board, and then passes through the drainage channel. The pooling function of the water tank flows into the sump along the drainage channel, enters the central drainage pipe through the horizontal drainage pipe, and finally leads out to the tunnel.

When the drainable waterstop described in the present invention needs maintenance and replacement, the sealing body is removed by chemical or physical chiseling, and then the bolts are removed, and finally, the drainable waterstop is extracted from the drainage gap; After the inspection and repair is completed, the repaired or new drainable waterstop is reinstalled in the drainage gap, and the maintenance and replacement of the drainable waterstop is realized. The maintenance and replacement method is simple and easy to operate.

In the tunnel waterproof and drainage system described in the present invention, the geotextile is normally lapped and laid during construction, and the impurities in the groundwater are filtered out by using the geotextile to ensure that relatively clear water flows into the drainable waterstop through the circumferential drainage gap and The horizontal drainage pipes are introduced into the tunnel, and then flow into the central drainage pipes from the horizontal drainage pipes, and finally the groundwater is led out of the tunnel.

In the tunnel waterproof and drainage system described in the present invention, the waterproof board is no longer a whole, the waterproof board is at the end of the drainage gap, and the position of the drainage board is folded into the drainage gap, so that it is attached and fixed to the lining wall, so that the two Leave a drainage channel in the middle of the waterproof board. The length of the waterproof board folded to the construction joint should be slightly larger than the thickness of the secondary lining of the tunnel, so as to facilitate the fixing of the waterproof board and integrate it with the external drainage components to ensure the airtightness of the entire waterproof and drainage system.

In the tunnel waterproof and drainage system described in the present invention, the drainable waterstop adopts an outer drainage rubber belt with a flange plate. The drainage part of the rubber belt has a semi-circular arc or V-shaped structure. The clamping section of the drainage part is slightly wider than the width of the drainage gap. Its own tension makes it fit better with the waterproof board during installation. The drainage box in the drainable waterstop can realize secondary waterproofing and drainage, and the flange plate of the drainage box ensures the fixed connection of the drainable waterstop

A tunnel waterproof and drainage system according to the present invention determines the water pressure of the secondary lining of the tunnel, the amount of seepage and the level of the surrounding rock of the tunnel, and combines the control standards of the water pressure and the amount of water seepage and the design index parameters of the tunnel to determine the The length of waterproof and drainage partitions. By setting drainage gaps, the secondary lining of the tunnel is divided into waterproof sections and drainage sections of different lengths. In the waterproof section, water is mainly used to limit the discharge of water; in the drainage section, underground water seepage through drainage Gap discharge, realize limited discharge, protect the ecological environment of water resources to the greatest extent, and minimize soil erosion, so as to achieve the matching of drainage and water seepage, rational use of resources during construction, and reduce construction costs. In the present invention, the drainable waterstop can be easily replaced, and the drainage facilities in each section can be actively maintained, which facilitates the removal of drainage sediments in the later stage, and solves the difficult problem of tunnel water leakage during operation, thereby realizing the waterproof and drainage system of the tunnel. "Vida". The invention can greatly improve the water leakage phenomenon of the tunnel, can improve the safety and durability of the overall structure of the tunnel, can greatly improve the driving safety performance in the tunnel, and reduce the limitation of the driving speed due to water leakage . The invention has the advantages of saving construction investment and operating investment, has obvious practical value, and has remarkable economic and social benefits. The waterproof and drainage system of the present invention adopts a limited discharge mode. The waterproof section is mainly waterproof to limit the discharge of water, and the drainage section is mainly limited to discharge, which reduces the damage of groundwater to the tunnel lining, and can also minimize water and soil loss, ensuring that the tunnel The ecological environment of the surrounding area is protected from damage.

The tunnel waterproof and drainage system described in the present invention is based on the concept of partition waterproof and drainage, and a drainable waterstop is set at the construction joint, deformation joint or settlement joint of the secondary lining of the tunnel. The drainable waterstop has the characteristics of damage and aging and can be replaced It also eliminates the vertical drainage pipes in the existing drainage system, replaces the current partition method of installing waterstops on the waterproof board, and also solves the problem that the internal drainage pipes of the waterproof drainage system are blocked and difficult to check or replace.

Claims (10)

1. a kind of tunnel waterproof and water drainage system, which is characterized in that including draining gap (1), can drainage water stop (2), transverse drainage (3) and central drain (4) are managed, preceding construction lining cutting (8) and rear construction lining in Tunnel Second Lining is arranged in draining gap (1) It builds between section (9), Tunnel Second Lining is divided by waterproof section and draining section by draining gap (1)；It drains gap (1) Along tunnel, arch face is arranged circumferentially；Can drainage water stop (2) insertion setting draining gap (1) back side, can drainage water stop (2) lay along draining gap (1) is circumferential, can the both ends of drainage water stop (2) extend in the gutter of tunnel two sides；Transverse drain (3) be horizontally installed in tunnel inverted arch (11), the both ends of transverse drain (3) respectively with tunnel two sides gutter；Central drain (4) it is arranged along length of tunnel direction, central drain (4) is connected to transverse drain (3).

2. a kind of tunnel waterproof and water drainage system according to claim 1, which is characterized in that be respectively set in the gutter of tunnel two sides Have catchment tray (5), the top of catchment tray (5) is connected to draining gap (1)；The bottom and transverse drain (3) of catchment tray (5) are even It is logical.

3. a kind of tunnel waterproof and water drainage system according to claim 1, which is characterized in that transverse drain (3) uses arc The minimum point of drainpipe, arc drainpipe is arranged on the center line of tunnel floor, and central drain (4) is placed in transverse drain (3) at minimum point, it is arranged on central drain (4) length direction and is obliquely installed, inclined direction and tunnel floor longitudinal slope direction It is adapted.

4. a kind of tunnel waterproof and water drainage system according to claim 1, which is characterized in that draining gap (1) is that tunnel is secondary Construction joint, subsiding crack or the deformation joint of lining cutting.

5. a kind of tunnel waterproof and water drainage system according to claim 1, which is characterized in that on the upstream face of Tunnel Second Lining It is disposed with splash guard (6) and geotextiles (7)；Splash guard (6) subsection setup at draining gap (1), drains gap (1) two Two pieces of splash guards (6) of side are protruded into draining gap (1), and are bonded respectively with the gap wall of the two sides of draining gap (1), two Block splash guard is reserved with drainage channel between (6)；The upstream face in splash guard (6) is arranged in geotextiles (7), and is close to preliminary bracing (12) it is arranged.

6. a kind of tunnel waterproof and water drainage system according to claim 1, which is characterized in that can drainage water stop (2) include row Water box (21) and rhone (22), drainage box (21) are fixed at the back side of draining gap (1), and drainage box (21) is spill Slot structure；The concave surface of drainage box (21) is upstream face, and rhone (22) is fixed on the upstream face of drainage box (21)；Draining One end of slot (22) is fixedly connected with drainage box (21), in the other end and insertion draining gap (1), two sides of rhone (22) Two sides gap wall of the wall respectively with draining gap (1) fits closely.

7. a kind of tunnel waterproof and water drainage system according to claim 6, which is characterized in that the section of rhone (22) is semicircle Arc or V-structure；Wherein, the bottom arc surface of semicircular arc structure is fixedly connected with drainage box (21), semicircular arc structure Two side walls respectively with draining gap (1) two sides gap wall fit closely；The bottom and drainage box (21) of V-structure are fixed Connection, two sides gap wall of the two side walls end of V-structure respectively with draining gap (1) fit closely.

8. a kind of tunnel waterproof and water drainage system according to claim 6, which is characterized in that the two side walls end of rhone (22) End is respectively arranged with clamping section (23), and clamping section (23) is fitted closely with draining gap (1)；Two clamping section (23) between away from From the slit width for being greater than draining gap (1)；It is clamped section (23) and uses wedge structure, be clamped the connecting pin of section (23) and rhone (22) For big end, the free end for being clamped section (23) is small end.

9. a kind of tunnel waterproof and water drainage system according to claim 6, which is characterized in that the two side walls of drainage box (21) point It is not provided with flange plate (24)；Wherein, a flange plate (24) is fixedly connected with preceding construction lining cutting section (8), another flange plate (24) it is fixedly connected with rear construction lining cutting section (9).

10. a kind of tunnel waterproof and water drainage system according to claim 9, which is characterized in that preceding construction lining cutting section (8) and after apply Work lining cutting section (9) surface is provided with mounting groove, and flange plate (24) is embedded in mounting groove；And pass through bolt (25) for flange plate (24) it is fixedly connected with mounting groove；Seal (26) are provided in mounting groove, for flange plate (24) to be sealingly disposed in installation In slot；Seal (26) is chemical seal glue, and chemical seal glue uses acrylic sealant or polysulfide sealant.