CN115787737A - Drainage structure for leakage water of deformation joint of underground tunnel and construction method - Google Patents

Abstract

The invention relates to the field of underground open cut highway tunnels, in particular to a water leakage drainage structure for deformation joints of an underground tunnel and a construction method. A water leakage and drainage structure for an underground tunnel deformation joint comprises a main body frame which is enclosed to form a tunnel; the main body frame comprises a plurality of main body units which are formed in a pouring mode, and a deformation joint is formed between every two adjacent main body units; side wall ditches along the tunnel trend are built on the two sides of the bottom surface of the tunnel above the main body frame, a water guide pipe is pre-embedded at the top of a deformation joint at the bottom of the tunnel, a water inlet hole facing the deformation joint is built on the water guide pipe, and the tail end of the water guide pipe extends to the side wall ditches. The drainage structure can be used for orderly discharging leakage water of the deformation joint through a reasonable flow path under the condition of not obviously increasing the cost through a newly-added drainage pipeline, two side ditches and the like.

Description

Drainage structure for leakage water of deformation joint of underground tunnel and construction method

Technical Field

The invention relates to the field of underground open cut highway tunnels, in particular to an underground tunnel deformation joint water leakage drainage structure and a construction method, and is mainly used for drainage of underground highway tunnel deformation joints.

Background

Along with the development of urban construction, urban underground highway tunnels are popularized rapidly, and the highway tunnels are obviously superior to highway viaducts in the aspects of noise pollution and surface aesthetics. However, underground works have increasingly high requirements for waterproofing and appearance of tunnels, and do not allow large-area wet soil leakage when the works are finished, and do not allow linear seepage when the works are in operation, although some measures such as: measures such as waterproofing membrane, movement joint water receiving box, crashproof curb side wall escape canal keep apart, the drainage to tunnel groundwater, but movement joint position, especially movement joint bottom plate percolating water still very serious.

The water leakage at the deformation joint accounts for more than 50% of the total water leakage of the tunnel due to the reasons of uneven settlement of the structure body, improper protection of coiled materials during construction, aging and even damage of the rubber waterstop and the like, and the water leakage in the region permeates into the concrete base layer and the asphalt concrete surface layer through the deformation joint. When water enters the asphalt concrete pavement structure from the deformation joint, the adhesion of asphalt is reduced, the adsorption force of the water on the surface of the coarse aggregate is greater than that of the asphalt, the asphalt is peeled off from the surface of the aggregate after long-term immersion, the water flows under the driving load, the peeled asphalt is lost due to the generated running water, and the water is wrapped and flows out of the asphalt concrete surface layer, so that the asphalt concrete pavement is loosened, peeled off, pits and other diseases, and the service life of the asphalt concrete surface layer at the deformation joint is shortened.

The deformation joint leaking stoppage degree of difficulty is big, and in case the rubber waterstop that has installed takes place to damage in the work progress will unable the change, and the settlement that the geology is inhomogeneous to lead to also can't be restoreed. At present, polyurethane is usually adopted for plugging deformation joints, is made of organic materials, is easily affected by underground water erosion and self aging, is low in durability, can only play a role in temporary plugging, and cannot fundamentally solve the problem of water leakage of the deformation joints.

Disclosure of Invention

In order to solve the above problems, an object of the present invention is to provide a drainage structure for leakage water from a deformation joint of an underground tunnel and a construction method thereof, wherein the drainage structure can sequentially drain the leakage water from the deformation joint through a reasonable flow path by means of a newly added drainage pipe, two side ditches, etc., without significantly increasing the cost.

In order to achieve the purpose, the invention adopts the following technical scheme:

a water leakage and drainage structure for an underground tunnel deformation joint comprises a main body frame which is enclosed to form a tunnel; the main body frame comprises a plurality of main body units which are formed in a pouring mode, and a deformation joint is formed between every two adjacent main body units; the method is characterized in that: side wall ditches along the tunnel trend are built above the main body frame on two sides of the bottom surface of the tunnel, a water guide pipe is pre-buried at the top of a deformation joint at the bottom of the tunnel, a water inlet hole facing the deformation joint is built on the water guide pipe, and the tail end of the water guide pipe extends to the side wall ditches.

The invention adopts the technical scheme, and relates to a water leakage and drainage structure for the deformation joint of the underground tunnel, wherein a water guide pipe is embedded in the top of the deformation joint at the bottom of the tunnel in the drainage structure, the water guide pipe can drain the water leakage in the deformation joint to a side wall ditch, and the side wall ditch can be collected to a water pump room along the direction of the tunnel; the method has the following beneficial effects:

1. a small amount of leakage water on the side wall of the deformation joint directly flows into the drainage hose, and is collected to the water pump room through the side wall ditch along the longitudinal slope of the tunnel, so that the leakage water is prevented from overflowing to the outer surface of the anti-collision kerbstone, and the attractiveness of the tunnel is improved.

2. After the seepage water at the deformation joint is drained, the underground water head is effectively reduced, the wet area of the wall body of the peripheral tunnel is obviously reduced, and the leakage stoppage cost is reduced.

3. The leakage water of the deformation joint is effectively drained, the leakage water cannot be retained at the deformation joint for a long time, the asphalt concrete pavement is in a dry environment, and the service life of the asphalt concrete surface layer at the deformation joint is prolonged.

Preferably, the depth of the buried pipe of the water guide pipe is not less than 2cm from the upper surface of the concrete of the bottom plate, and a deformation joint above the water guide pipe is sealed by adopting fast cement. The deformation joint is sealed by adopting double-quick cement, so that the upward permeation of leakage water is avoided.

In a further preferred scheme, a foam rod is arranged on an outer end seam of a deformation joint of the side wall of the tunnel, and the bottom of the foam rod extends into a side wall ditch or is communicated with a water guide pipe. In the scheme, the leakage water on the side wall of the tunnel is absorbed and drained to the side wall ditch through the foam rod in the deformation joint, or is drained to the side wall ditch by means of the water guide pipe, so that the leakage water on the side wall of the tunnel can be removed. It should be noted that, because the tunnel side wall is vertically arranged, the water guide pipe drainage is not ideal, and the adsorption and permeation effects through the foam rod are better.

Preferably, the burial depth of the foam rod is not less than 2cm away from the surface of the inner wall of the main body structure, and the outer end seam opening of the deformation joint on the outer side of the foam rod is sealed by sealing paste. The sealing compound prevents water adsorbed by the foam stick from seeping out of the side wall.

Preferably, HDPE waterproof coiled materials are laid between the main body frame at the bottom and the concrete cushion layer below the main body frame, and between the main body frame at the side wall and the enclosure structure at the outer side of the main body frame; and a waterproof reinforcing layer is additionally arranged on the HDPE waterproof roll material close to the deformation joint. The HDPE waterproofing membrane plays a layer of water-proof effects.

Preferably, an externally-attached rubber water stop is arranged on the outer side wall of the surrounding main body frame, the externally-attached rubber water stop is laid on the HDPE waterproof coiled material, and the inner side portion of the externally-attached rubber water stop is poured in the main body units on two sides of the deformation joint. The external rubber waterstop has a second layer waterproof effect.

Preferably, the buried steel-edge rubber water stop is further poured inside the main body frame, the buried steel-edge rubber water stop is arranged around the main body frame, and two ends of the buried steel-edge rubber water stop are respectively poured between two adjacent main body units. The buried steel-edged rubber waterstop has a third-layer waterproof effect.

Preferably, the upward tilting angle of the two steel edges of the buried steel edge rubber water stop at the bottom of the tunnel is 15-20 degrees. In the scheme, the steel edge rubber waterstops arranged on the bottom plate are required to be arranged according to a basin shape, the horizontal tilting angle of the steel edge is 15-20 degrees, and the bottom plate concrete is conveniently vibrated and compacted.

Preferably, anti-collision curbstones are built on two sides of the bottom surface of the tunnel above the main body frame, and side wall ditches are formed on the anti-collision curbstones. This scheme, side wall ditch integrated into one piece is on crashproof kerbstone, and the scheme is more simple.

Preferably, the SBS waterproof coiled material, the concrete base layer and the asphalt concrete surface layer are sequentially arranged above the main body frame between the two anti-collision curbstones from bottom to top.

A construction method of an underground tunnel deformation joint water leakage drainage structure is characterized in that: the method comprises the following steps:

s1, pouring a concrete cushion layer after groove inspection of a tunnel foundation pit is completed, wherein the thickness of the cushion layer is 10cm;

s2, measuring on the poured concrete cushion, and lofting and marking the center line of the tunnel, the position of the deformation joint, the side wall side line, the height line of the bottom plate and the like;

s3, paving a large-area HDPE waterproof coiled material, and additionally paving a layer of HDPE coiled material at the deformation joint position for reinforcement;

s4, paving an externally-attached rubber water stop along the deformation seam, and fixing the side wall and the above parts on the ground surface by adopting a high-strength binding band;

s5, mounting a bottom plate steel bar and a middle-buried steel-edge rubber waterstop, mounting a construction joint and a short side wall template, and pouring a main structure bottom plate;

s6, removing the construction joints and the low side wall templates, chiseling the low side walls, lengthening HDPE (high-density polyethylene) waterproof coiled materials of the side walls, installing side wall steel bars, adjusting the positions of the embedded steel edge rubber waterstops, installing side walls and deformation joint upper side templates, erecting full formwork supports, laying top plate templates, installing top plate steel bars on the templates, and performing concrete pouring;

s7, removing the deformation joint template, the full framing and the internal template, installing a polyethylene plate with the thickness of 20mm in the deformation joint, and pouring the main tunnel structure on the other side of the deformation joint according to the steps;

s8, cleaning deformation joints of the side wall, removing sundries in the joints within a range of 4cm from the surface of the inner wall, filling foam rods, and coating and scraping sealing paste;

s9, cleaning the deformation joint of the base plate, removing sundries in the joint within a range of 5cm from the upper surface of the base plate, filling the drilled PVC steel wire hose, and reserving surplus length at each end to be not shorter than 80cm;

s10, mounting anti-collision wall reinforcing steel bars, enabling PVC steel wire hoses to penetrate through the reinforcing steel bars on the lower portion of the anti-collision wall, temporarily fixing the PVC steel wire hoses at the positions of ditches, mounting the ditches and the anti-collision wall templates together by using customized templates, and pouring anti-collision wall concrete after checking and acceptance;

s11, removing the ditch and the anti-collision wall template, and cutting off the surplus length of the PVC steel wire hose to ensure that the opening of the PVC steel wire hose is opposite to the ditch;

s12, flushing and cleaning slurry and sundries in the deformation joint, paying attention to protection of the embedded PVC hose, and adopting double-speed cement to block the deformation joint;

s13, drying surface water stains within 1m of each of two sides of the deformation joint in a flame spraying heating mode, and then coating and scraping non-cured rubber asphalt waterproof paint, wherein the coating range of each edge of two sides of the deformation joint is 15cm wider than that of the SBS waterproof coiled material;

s14, paving and pasting an SBS (styrene butadiene styrene) waterproof coiled material on the surface of the non-cured asphalt waterproof coating of the deformation joint, heating and paving at the same time, paving and pasting to the side surface of the anti-collision kerbstone base layer in the length direction, wherein the distance between each side of the deformation joint in the width direction is not less than 40cm;

s15, pouring a tunnel concrete base layer and maintaining;

and S16, paving the tunnel asphalt concrete surface layer.

Drawings

FIG. 1 is a typical cross-sectional view of a tunnel deformation joint;

FIG. 2 isbase:Sub>A sectional view taken along line A-A;

FIG. 3 is a sectional view taken along line B-B;

FIG. 4 is an enlarged view of node C;

the figure is marked with: 1-HDPE waterproof coiled material, 2-external rubber waterstop, 3-main body frame, 4-middle embedded steel edge rubber waterstop, 5-phi 20mm foam rod, 6-sealant, 7-crashproof kerbstone, 8-phi 21mm PVC hose, 9-double-quick cement, 10-SBS waterproof coiled material, 11-concrete base layer, 12-asphalt concrete surface layer, 13-enclosure structure, 14-20mm polyethylene plate, 15-concrete cushion layer, 16-side wall ditch and 31-main body unit.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present invention, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation that the first and second features are not in direct contact, but are in contact via another feature between them. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.

Example 1:

as shown in fig. 1 to 4, the present embodiment relates to a water leakage drainage structure for a deformation joint of an underground tunnel, which comprises a main frame enclosing to form a tunnel; the main body frame 3 comprises a plurality of pouring-molded main body units 31, a deformation joint is formed between every two adjacent main body units 31, and a polyethylene plate 14 is arranged in the deformation joint to separate the two main body units 31. Tunnel bottom surface both sides are built the side wall ditch 16 along the tunnel trend above main body frame 3, and the top of the movement joint of tunnel bottom is pre-buried to have aqueduct 8, and the last inlet opening of constructing towards the movement joint of aqueduct 8 specifically is that every 20cm sets up a phi 5mm hole, the hole orientation: vertically downwards. The tail end of the water guide pipe 8 extends to a side wall ditch 16, the buried depth of the water guide pipe 8 is not less than 2cm away from the upper surface of the bottom plate concrete, and a deformation joint above the water guide pipe 8 is sealed by using quick setting cement 9. The deformation joint is sealed by adopting the double-quick cement 9, the upward permeation of leakage water is avoided, the double-quick cement 9 is embedded in the steel wire hose, and the deformation joint is sealed by coating and scraping after the side wall anti-collision wall and the side wall ditch 16 are poured.

As shown in fig. 1 and 4, crashworthy curbstones 7 are constructed above the body frame 3 on both sides of the tunnel floor, and sidewall gutters 16 are formed on the crashworthy curbstones 7. The side wall ditch 16 is made of concrete and is poured together with the anti-collision kerbstone 7, the ditch is arc-shaped, the diameter of the arc is 20cm, the depth of the ditch is 14cm, and the drainage gradient is consistent with the longitudinal slope of the tunnel.

Further, an SBS waterproof coiled material 10, a concrete base layer 11 and an asphalt concrete surface layer 12 are sequentially arranged above the main body frame 3 between the two anti-collision curbstones 7 from bottom to top. SBS waterproofing membrane 10 scribbles at two fast cement 9 and scrapes the completion back, adopt the flame projecting heating mode, the surface water stain of each 1m scope in stoving movement joint both sides, non-curing rubber pitch water proof coating surface is paintd again, the scope is paintd on every limit in movement joint both sides is wider 15cm than SBS waterproofing membrane 10, spread SBS waterproofing membrane 10 on non-curing rubber pitch water proof coating, the limit is heated, the limit is spread and is pasted, the coiled material is spread and is pasted along the movement joint, need spread on the length direction and paste 7 basic unit sides of crashproof kerbstone, 40cm is no less than to every limit movement joint in width direction.

In a further preferred scheme, a foam rod 5 is arranged on an outer end seam of the deformation joint of the tunnel side wall, and the bottom of the foam rod 5 extends into the side wall ditch 16 or is communicated with the water guide pipe 8. In the scheme, the leakage water on the side wall of the tunnel is absorbed and guided to the side wall ditch 16 through the foam rod 5 in the deformation joint, or is guided to the side wall ditch 16 by the water guide pipe 8, so that the leakage water on the side wall of the tunnel can be eliminated. It should be noted that, because the tunnel side wall is vertically arranged, the water guide pipe 8 is not ideal for drainage, and the adsorption and permeation effects through the foam rod 5 are better. The burial depth of the foam rod 5 is not less than 2cm away from the surface of the inner wall of the main body structure, and the outer end seam opening of the deformation joint on the outer side of the foam rod 5 is sealed by adopting sealing paste 6. The sealing compound 6 prevents water adsorbed by the foam rod 5 from penetrating out of the side wall.

HDPE waterproof coiled materials 1 are laid between the main body frame 3 at the bottom and the concrete cushion 15 below the main body frame 3, and between the main body frame 3 at the side wall and the enclosing structure 13 at the outer side of the main body frame. HDPE waterproofing membrane 1 plays one deck water-proof effects, and HDPE waterproofing membrane 1 adopts macromolecular material, and the joint overlap joint adopts polymer overlap joint sticky tape. The HDPE waterproofing membrane 1 that is close to movement joint department additionally sets up the waterproof enhancement layer of one deck, and the material is the HDPE coiled material simultaneously.

Further, outer-attached rubber water stop belts 2 are arranged on the outer side wall of the main body frame 3, the outer-attached rubber water stop belts 2 are flatly laid on the HDPE waterproof coiled material 1, and the inner portions of the outer-attached rubber water stop belts 2 are poured in the main body units 31 on two sides of the deformation joint. The external rubber waterstop 2 has a second-layer waterproof effect.

Further, the buried steel-edge rubber water stop 4 is poured inside the main body frame 3, the buried steel-edge rubber water stop 4 is arranged around the main body frame 3, and two ends of the buried steel-edge rubber water stop 4 are respectively poured between the two adjacent main body units 31. Bury formula steel limit rubber waterstop 4 and play third layer water-proof effects, bury formula steel limit rubber waterstop 4 in and be fixed in bottom plate concrete structure central authorities through interim template, the long limit trend is on a parallel with the movement joint, and concrete floor pours the back that finishes, takes out interim template. In a further scheme shown in fig. 3, two steel edges of the buried steel-edged rubber water stop 4 at the bottom of the tunnel are tilted upwards at an angle of 15-20 °. In the scheme, the steel edge rubber waterstop arranged on the bottom plate needs to be arranged according to a basin shape, the horizontal tilting angle of the steel edge is 15-20 degrees, and the bottom plate concrete is conveniently vibrated and compacted.

In conclusion, the scheme relates to an underground tunnel movement joint percolating water drainage structure, and five waterproof structures are arranged at the bottom of a tunnel and are respectively a HDPE waterproof coiled material 1, an externally-attached rubber water stop 2, a middle-embedded steel edge rubber water stop 4, a phi 21mm PVC steel wire hose and an SBS waterproof coiled material 10. And four waterproof structures are arranged at deformation joints of the side wall of the tunnel, namely a HDPE waterproof coiled material 1, an externally-attached rubber water stop 2, a middle-embedded steel-edge rubber water stop 4 and a foam rod 5 with the diameter of 20 mm.

Furthermore, the top of the deformation joint of the drainage structure bottom in the tunnel is pre-buried with aqueduct 8, and aqueduct 8 can be with the interior percolating water drainage of deformation joint to side wall ditch 16, and side wall ditch 16 can collect to the water pump room along the tunnel trend. The method has the following beneficial effects:

1. a small amount of leakage water on the side wall of the deformation joint directly flows into the drainage hose, and is collected to the water pump room through the side wall ditch 16 along the longitudinal slope of the tunnel, so that the leakage water is prevented from overflowing to the outer surface of the anti-collision kerbstone 7, and the attractiveness of the tunnel is improved.

2. After the seepage water at the deformation joint is drained, the underground water head is effectively reduced, the wet area of the wall body of the peripheral tunnel is obviously reduced, and the leakage stoppage cost is reduced.

3. The leakage water of the deformation joint is effectively drained, the leakage water cannot be retained at the deformation joint for a long time, the asphalt concrete pavement is in a dry environment, and the service life of the asphalt concrete surface layer 12 at the deformation joint is prolonged.

Above-mentioned scheme can be under the condition of not showing the incremental cost, through newly-increased drainage pipe, both sides ditch etc. discharge the percolating water of movement joint in order through reasonable flow path. On one hand, the structure can effectively reduce the wet area of the deformation joint and the peripheral side wall caused by water leakage before completion acceptance check, achieve the acceptance check standard, and reduce the times of leak stoppage maintenance and the cost of leak stoppage; on the other hand, in the later operation period, the structure reduces the possibility of water accumulation of the concrete base layer 11 above the deformation joint, fundamentally prevents the flowing water generated by the driving load from impacting asphalt particles of the surface layer, prolongs the service life of the tunnel asphalt concrete pavement and reduces the maintenance cost of the pavement in the operation period.

Example 2:

the embodiment provides a construction method of a drainage structure for leakage water of a deformation joint of an underground tunnel, in particular to a construction method of the drainage structure provided in the embodiment 1, which comprises the following steps:

the specific implementation mode is as follows:

s1, after the groove inspection of the tunnel foundation pit is completed, pouring a concrete cushion layer 15, wherein the thickness of the cushion layer is 10cm.

And S2, measuring the poured concrete cushion 15, and lofting and marking the center line of the tunnel, the position of the deformation joint, the side wall side line, the bottom plate height line and the like.

And S3, paving a large-area HDPE waterproof coiled material 1, and additionally paving a layer of HDPE coiled material at the deformation joint position for reinforcement.

S4, paving an externally-attached rubber water stop 2 along the deformation seam, and fixing the side wall and the above parts on the ground surface by adopting a high-strength binding band.

And S5, installing the bottom plate steel bars and the middle-buried steel-edge rubber water stop 4, installing construction joints and low-edge wall templates, and pouring a main structure bottom plate.

S6, chiseling the short side wall, lengthening the HDPE waterproof coiled material 1 of the side wall, installing side wall reinforcing steel bars, adjusting the position of the middle embedded type steel-edge rubber water stop 4, installing the side wall and deformation joint templates, building a full-space formwork support, laying a top plate template, installing top plate reinforcing steel bars on the template, and pouring concrete.

And S7, removing the deformation joint template, the full framing and the internal template, installing a polyethylene plate with the thickness of 20mm in the deformation joint, and pouring the tunnel main body structure on the other side of the deformation joint according to the steps.

S8, cleaning deformation joints of the side wall, removing sundries in the joints within a range of 4cm from the surface of the inner wall, filling the foam rods 5, and coating and scraping sealing paste 6.

And S9, cleaning the deformation joint of the base plate, removing sundries in the joint within a range of 5cm from the upper surface of the base plate, filling the drilled PVC steel wire hose, and reserving surplus length at each end not shorter than 80cm.

And S10, installing anti-collision wall reinforcing steel bars, enabling PVC steel wire hoses (namely the water guide pipes 8) to penetrate through the reinforcing steel bars on the lower portion of the anti-collision wall, temporarily fixing the PVC steel wire hoses on the positions of ditches, installing the ditches together with the anti-collision wall templates by adopting customized templates, and pouring anti-collision wall concrete after checking and acceptance.

S11, removing the ditch and the anti-collision wall template, and cutting off the surplus length of the PVC steel wire hose to ensure that the hose is opposite to the ditch.

S12, flushing and cleaning slurry and sundries in the deformation joint, paying attention to protection of the embedded PVC hose, and adopting double-speed cement 9 to plug the deformation joint.

And S13, drying surface water stains within 1m of each of two sides of the deformation joint in a flame spraying heating mode, and then coating and scraping non-cured rubber asphalt waterproof paint, wherein the coating range of each edge of two sides of the deformation joint is 15cm wider than that of the SBS waterproof coiled material 10.

S14, paving and pasting the SBS waterproof coiled material 10 on the surface of the deformation joint non-cured asphalt waterproof coating while heating, paving and pasting the SBS waterproof coiled material to the side face of the base layer of the anti-collision kerbstone 7 in the length direction, wherein the distance between each side of the deformation joint in the width direction is not less than 40cm.

And S15, pouring the tunnel concrete base layer 11 and maintaining.

And S16, paving the tunnel asphalt concrete surface layer 12.

In the description of the specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.

Claims (10)

1. A water leakage and drainage structure for a deformation joint of an underground tunnel comprises a main body frame (3) which is enclosed to form the tunnel; the main body frame (3) comprises a plurality of cast main body units (31), and a deformation joint is constructed between every two adjacent main body units (31); the method is characterized in that: side wall ditches (16) along the tunnel trend are built above the main body frame (3) on two sides of the bottom surface of the tunnel, a water guide pipe (8) is pre-embedded at the top of a deformation joint at the bottom of the tunnel, a water inlet hole facing the deformation joint is built on the water guide pipe (8), and the tail end of the water guide pipe (8) extends to the side wall ditches (16).

2. The underground tunnel deformation joint water leakage drainage structure of claim 1, characterized in that: and deformation joints above the water guide pipes (8) are sealed by adopting double-quick cement (9).

3. The underground tunnel deformation joint water leakage drainage structure of claim 1, characterized in that: a foam rod (5) is arranged on an outer end seam of a deformation joint of the side wall of the tunnel, and the bottom of the foam rod (5) extends into a side wall ditch (16) or is communicated with a water guide pipe (8); the depth of the foam rod (5) is not less than 2cm from the surface of the inner wall of the main body structure, and the outer end seam opening of the deformation joint on the outer side of the foam rod (5) is sealed by adopting sealing paste (6).

4. The underground tunnel movement joint water seepage drainage structure of claim 1, characterized in that: HDPE waterproof coiled materials (1) are laid between the main body frame (3) at the bottom and the concrete cushion (15) below the main body frame, and between the main body frame (3) at the side wall and the enclosing structure (13) at the outer side of the main body frame; and a waterproof reinforcing layer is additionally arranged on the HDPE waterproof roll (1) close to the deformation joint.

5. The underground tunnel movement joint seepage water drainage structure of claim 4, characterized in that: outer-attached rubber water stops (2) are arranged on the outer side wall of the main body frame (3), the outer-attached rubber water stops (2) are laid on the HDPE waterproof coiled material (1), and the inner portions of the outer-attached rubber water stops (2) are poured in main body units (31) on two sides of the deformation joint.

6. The underground tunnel movement joint seepage water drainage structure of claim 3, characterized in that: the buried steel edge rubber water stop (4) is poured inside the main body frame (3), the buried steel edge rubber water stop (4) is arranged around the main body frame (3), and two ends of the buried steel edge rubber water stop are poured between the two adjacent main body units (31) respectively.

7. The underground tunnel movement joint seepage water drainage structure of claim 6, characterized in that: the upward tilting angle of two steel edges of the buried steel edge rubber water stop (4) at the bottom of the tunnel is 15-20 degrees.

8. The underground tunnel movement joint water seepage drainage structure of claim 1, characterized in that: crashproof kerbstones (7) are built on the two sides of the bottom surface of the tunnel above the main body frame (3), and side wall ditches (16) are formed on the crashproof kerbstones (7).

9. The underground tunnel movement joint seepage water drainage structure of claim 8, characterized in that: an SBS waterproof coiled material (10), a concrete base layer (11) and an asphalt concrete surface layer (12) are sequentially arranged above the main body frame (3) between the two anti-collision curbstones (7) from bottom to top.

10. A construction method of an underground tunnel deformation joint water leakage drainage structure is characterized in that: the method comprises the following steps:

s1, after the groove inspection of the tunnel foundation pit is finished, pouring a concrete cushion layer (15), wherein the thickness of the cushion layer is 10cm;

s2, measuring on the poured concrete cushion (15), and lofting and marking the center line of the tunnel, the positions of deformation joints, side wall side lines, a bottom plate height line and the like;

s3, paving a large-area HDPE waterproof coiled material (1), and additionally paving a layer of HDPE coiled material at the deformation joint position for reinforcement;

s4, laying an externally-attached rubber water stop (2) along the deformation seam, and fixing the side wall and the above parts on the ground surface by adopting high-strength binding bands;

s5, mounting a bottom plate steel bar and a middle-buried steel-edge rubber water stop (4), mounting a construction joint and a short side wall template, and pouring a main structure bottom plate;

s6, removing the construction joints and the low side wall templates, chiseling the low side walls, lengthening the side wall HDPE waterproof coiled material (1), installing side wall reinforcing steel bars, adjusting the positions of the embedded steel side rubber water stops (4), installing side walls and deformation joint upper side templates, erecting full formwork supports, laying top plate templates, installing top plate reinforcing steel bars on the templates, and performing concrete pouring;

s7, removing the deformation joint template, the full framing and the internal template, installing a polyethylene plate with the thickness of 20mm in the deformation joint, and pouring the tunnel main body structure on the other side of the deformation joint according to the steps;

s8, cleaning deformation joints of the side wall, removing sundries in the joints within a range of 4cm from the surface of the inner wall, filling foam rods (5), and coating and scraping sealing paste (6);

s9, cleaning the deformation joint of the base plate, removing sundries in the joint within a range of 5cm from the upper surface of the base plate, filling the drilled PVC steel wire hose, and reserving surplus length at each end to be not shorter than 80cm;

s10, mounting anti-collision wall reinforcing steel bars, enabling PVC steel wire hoses to penetrate through the reinforcing steel bars on the lower portion of the anti-collision wall, temporarily fixing the PVC steel wire hoses at the positions of ditches, mounting the ditches and the anti-collision wall templates together by using customized templates, and pouring anti-collision wall concrete after checking and acceptance;

s11, removing the ditch and the anti-collision wall template, and cutting off the surplus length of the PVC steel wire hose to ensure that the opening of the PVC steel wire hose is opposite to the ditch;

s12, flushing and cleaning slurry and sundries in the deformation joint, paying attention to protection of the embedded PVC hose, and adopting double-speed cement (9) to block the deformation joint;

s13, drying surface water stains within the range of 1m on two sides of the deformation joint in a flame-spraying heating mode, and then coating and scraping non-cured rubber asphalt waterproof coating, wherein the coating range of each edge on two sides of the deformation joint is 15cm wider than that of the SBS waterproof roll (10);

s14, paving and pasting an SBS (styrene butadiene styrene) waterproof coiled material (10) on the surface of the deformation joint non-cured asphalt waterproof coating while heating, paving and pasting the SBS waterproof coiled material to the side face of the base layer of the anti-collision kerbstone (7) while paving and pasting the SBS waterproof coiled material in the length direction, wherein the distance between each side of the deformation joint in the width direction is not less than 40cm;

s15, pouring a tunnel concrete base layer (11) and maintaining;

and S16, paving the tunnel asphalt concrete surface layer (12).

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