Targeted water stopping device and method for mountain tunnel construction

Abstract

The invention relates to the technical field of buildings, and provides a targeted water stopping device and method for mountain tunnel construction, and the targeted water stopping device for mountain tunnel construction comprises a plurality of composite formwork units which are spliced and annularly arranged; each composite formwork unit comprises a water stop belt, a steel assembly used for fixing the position of the water stop belt, a formwork assembly detachably connected to the steel assembly and a fixing assembly used for connecting the formwork assembly and the steel assembly. The water stop belt is provided with a water drainage pipe, and the water drainage pipe is provided with a water drainage hole used for draining water retained on the water stop belt through the water drainage pipe. A barrier film is fixed to the peripheral wall of the drainage pipe and covers the drainage hole, and a thorn head used for puncturing the barrier film and a cleaning piece arranged on the thorn head are gradually arranged on the drainage pipe in the direction away from the drainage hole. The water stop belt has the beneficial effect of reducing the discharge influence on water detained on the water stop belt.

Description

Technical Field

[0001] The present application relates to the technical field of construction, and in particular to a targeted water-stopping device and method for mountain tunnel construction. Background Art

[0002] The fault fracture zone of mountain tunnels in karst areas has complex lithology and broken surrounding rocks. Under the condition of sufficient groundwater recharge, geological disasters such as high-pressure water inrush are very likely to occur, which seriously affects the construction progress and safety. In addition to the broken surrounding rocks and poor stability, the fault fracture zone often contains a large amount of groundwater. When mountain tunnels pass through the fault fracture zone, they often face the danger of mud, water, water or mud inrush.

[0003] In the prior art, water leakage mainly occurs at construction joints and deformation joints, where deformation joints are waterproofed by back-sticking waterstops and embedded rubber waterstops. In actual projects, when the amount of water in the surrounding rock is large, due to the high water pressure, the surrounding rock pressure water has nowhere to be discharged and will seep through the contact between the waterstop and the lining, leaking from the deformation joints, affecting the overall construction quality of the tunnel.

[0004] In this regard, in the prior art, a drainage pipe is provided which is integrated with the water stop belt, and a drainage hole is provided on the drainage pipe. When water overflows to the drainage hole, the water enters the drainage pipe through the drainage hole, flows along the length direction of the drainage pipe to drain water, and can relieve pressure. However, when the drainage pipe is in a water-rich state for a long time, with long-term use, it will carry the salt in the karst area to the drainage hole, so that the drainage hole is blocked after salt accumulation occurs at the drainage place, thereby affecting the subsequent water flow, and the drainage effect is reduced, so further improvement is needed. Summary of the invention

[0005] In order to reduce the impact on the discharge of water retained on the waterstop, the present application provides a targeted waterstop device and method for mountain tunnel construction.

[0006] The present application provides a targeted water stopping device and method for mountain tunnel construction, which adopts the following technical solutions: A targeted water-stopping device and method for mountain tunnel construction, comprising a plurality of composite template units spliced ​​and arranged in an annular direction, wherein the composite template unit comprises a waterstop, a steel component for fixing the position of the waterstop, a template component detachably connected to the steel component, and a fixing component for connecting the template component and the steel component; a drainage pipe is arranged on the waterstop, and a drainage hole is arranged on the drainage pipe for discharging water retained on the waterstop through the drainage pipe; a barrier film is fixed to the outer peripheral wall of the drainage pipe, and the barrier film covers Covering the drainage hole, the drainage pipe is gradually provided with a piercing head for piercing the barrier film, a cleaning piece arranged on the piercing head, an elastic pushing piece for pushing the cleaning piece to move toward the barrier film, and a limiting piece for limiting the sliding of the cleaning piece in the direction away from the drainage hole; the cleaning piece includes a cleaning rod and a plurality of brushes wrapped around the outer peripheral wall of the cleaning rod, the piercing head is fixedly connected to the end face of the cleaning rod close to the drainage hole, and the cleaning rod slides through the drainage hole and abuts against the inner peripheral wall of the drainage hole under the elastic force of the elastic pushing piece.

[0007] By adopting the above technical solution, when laying the water stop, the drain hole may be blocked by external substances or the subsequently poured concrete, affecting its drainage effect. If it penetrates into the drain pipe through the drain hole, for the concrete, it may enter the drain pipe through the drain hole later, so that there is a gap between the concrete after subsequent solidification, affecting the overall strength and the drainage effect of the drain pipe. Therefore, a barrier film covering the drain hole is fixed on the outer peripheral wall of the drain pipe, which can reduce the possibility of external substances or concrete blocking the drain hole and entering the drain pipe through the drain hole, so as to reduce the possibility of gaps in the concrete when pouring concrete. It should be noted that when pouring concrete, it is necessary to ventilate the drain pipe to carry out pressure maintenance treatment to reduce the possibility of the isolation membrane being concave or broken by the pressure of the concrete. After the poured concrete is dry, by releasing the limiter that restricts the sliding of the thorn head, the thorn head can be driven to pierce the barrier film under the elastic force of the elastic pusher.

[0008] Under normal conditions, the cleaning rod can slide under the elastic force of the elastic pusher and be inserted into the drainage hole, and abut against the inner peripheral wall of the drainage hole. When water is retained on the waterstop and flows to the drainage hole, its own water pressure is greater than the elasticity of the elastic pusher, which will push the cleaning rod to move away from the drainage hole to retreat into the drainage pipe, and drive the brush at this time to clean the inner peripheral wall of the drainage hole, so as to remove the salt accumulated by the previously retained water with lower water pressure after drying up, and discharge it with the water flowing through the drainage hole into the drainage pipe, so as to reduce the possibility of salt accumulation in the drainage hole, and relieve the pressure of water with higher water pressure, thereby reducing the possibility of pressure water in karst areas seeping through the contact between the waterstop and the lining and leaking from the deformation joint. For the water still retained on the waterstop, its own water pressure is released by the drainage hole and the drainage pipe, making it difficult to seep out of the tunnel, and also reducing the damage to the inner wall of the tunnel.

[0009] Preferably, the elastic pushing member includes a telescopic sleeve and a spring built into the telescopic sleeve, the telescopic sleeve is arranged as a rubber bellows, the end of the cleaning rod away from the drain hole is fixedly penetrated through the telescopic sleeve, a connecting rod is arranged between the outer peripheral wall of the telescopic sleeve and the inner wall of the drain pipe, the two ends of the spring are respectively fixed to the two opposite inner end surfaces of the telescopic sleeve, and the spring forces the cleaning rod to move toward the direction close to the drain hole.

[0010] By adopting the above technical solution, the elasticity of the spring itself is used to drive the telescopic sleeve to expand and contract, so as to change the length of the telescopic sleeve, and then to push the cleaning rod to slide and insert into the drainage hole. With the impact of the water flow and the elastic force between the springs, the cleaning rod repeatedly slides through and slides out of the drainage hole to clean the accumulated salt in the drainage hole.

[0011] Preferably, the limiting member includes a first connecting rope detachably connected to the cleaning rod or the telescopic sleeve, a second connecting rope fixed to the first connecting rope, and a hook fixed to the drain pipe at the inner wall of the pipe opening, and the second connecting rope is tied to the hook.

[0012] By adopting the above technical solution, before covering with the isolation film, the cleaning assembly is first installed in the drain pipe, and then the second connecting rope is pulled to apply pressure to the first connecting rope to pull the cleaning rod or the telescopic sleeve to reduce the cleaning rod from sliding through the drain hole, and then the second connecting rope is tied to the hook, and the isolation film is covered on the drain hole. When it is put into use later, the hook is untied so that the cleaning rod pierces the isolation film under the elastic force of the spring.

[0013] Preferably, a plurality of drainage holes are arranged at intervals along the length direction of the drainage pipe, adjacent first connecting ropes are connected to the same second connecting rope, one end of the first connecting rope away from the second connecting rope is bonded with a first tape, and the other end of the first tape is bonded to the cleaning rod or the telescopic sleeve.

[0014] By adopting the above technical solution, the second connecting rope is pulled hard to pull the first adhesive tape to break the first adhesive tape, thereby driving the second connecting rope and the first connecting rope to slide out of the drainage pipe.

[0015] Preferably, the limiting member includes a second tape bonded to the cleaning rod, the two ends of the second tape are respectively arranged on both sides of the cleaning rod, the second tape is wrapped around the end surface of the telescopic sleeve away from the cleaning rod, and the tape is bonded to the lower end surface of the telescopic sleeve so that the second tape is U-shaped, and the second tape is a water-soluble tape.

[0016] By adopting the above technical solution, after the concrete is dry, a certain amount of water is introduced into the drain pipe so that the second tape, which is a water-soluble tape, dissolves in water. Then, when water does not flow from the drain hole into the drain pipe, the cleaning rod slides and is inserted into the drain hole under the action of the spring to puncture the isolation membrane, thereby unlocking the limit member.

[0017] Preferably, the steel component includes an upper plate and a lower plate arranged along the length direction of the composite formwork unit and a connecting strip arranged between the upper plate and the lower plate, the lower plate is used to be fixed to the side ribs of the lining trolley, the upper plate includes a flat plate, a first vertical plate fixed to the upper surface on one side of the flat plate in the width direction, and a second vertical plate fixed to the lower surface on the other side of the flat plate in the width direction; the lower part of the second vertical plate and the upper part of the lower plate are simultaneously abutted against the middle position of the waterstop strip, and the first vertical plate and the lower plate are detachably fixed by the connecting strip; the formwork assembly is detachably fixed to the first vertical plate by a fixing assembly, and an accommodating cavity for accommodating the exposed half-width portion of the waterstop strip is formed between the lower part of the template assembly and the lower plate.

[0018] By adopting the above technical scheme, during use, firstly, through the matching upper plate and lower plate, on the one hand, the position of the waterstop can be stably fixed to ensure that the waterstop will not be moved during concrete pouring, so that the waterproof effect of the secondary lining construction joint is significantly enhanced; secondly, it can also avoid direct contact between the exposed half of the waterstop and the poured concrete, thereby ensuring the integrity and waterproofness of the waterstop structure; thirdly, due to the provision of the accommodating cavity, it can provide bending space for the exposed half of the waterstop. Compared with the waterstop fixing method of the prior art, the bending deformation degree of the waterstop of this structure is smaller, which can ensure the integrity of the waterstop to a great extent and improve the waterproofness from the side; fourthly, by providing the first vertical plate, the outer surface of which is used as the fitting reference surface of the template assembly, the flatness of the template assembly can be improved to reduce the occurrence of concrete leakage during the pouring process.

[0019] Preferably, the first vertical plate is detachably connected with a plurality of elastic thin rods extending downwardly toward the fixed half-width portion of the waterstop belt, and the free ends of the elastic thin rods are provided with hook bodies, the hook tips of the hook bodies are inclined downward and arranged toward the first vertical plate, and the hook bodies hook the free side edges of the fixed half-width of the waterstop belt.

[0020] By adopting the above technical solution, when installing the upper plate, first ensure that the lower part of the upper plate abuts against the middle part of the waterstop, and use the abutment point as a base point to deflect the upper plate toward the depth of the secondary lining; during this period, the elastic thin rod forces the hook body to tightly abut against the upper surface of the fixed half-width part of the waterstop, and when the upper plate is deflected to the edge of the fixed half-width part of the waterstop, the upper plate is reset and deflected, so that the hook body hooks the edge of the waterstop, and gradually drives the fixed half-width part of the waterstop to move and deform to a straight state, thereby ensuring that after pouring, the water-retaining effect of the waterstop can be fully exerted, thereby improving the waterproof performance in disguise; when the upper plate is to be disassembled, the elastic thin rod can be detached, so that the elastic thin rod remains in the concrete.

[0021] Preferably, the lower portion of the second vertical plate is radially slidably connected with an abutment plate, and a compression spring is provided between the second vertical plate and the abutment plate, and the compression spring forces the bottom surface of the abutment plate to abut against the upper surface of the water stop strip.

[0022] By adopting the above technical solution, by setting an abutment plate that elastically abuts against the waterstop belt, on the one hand, the clamping and fixing stability of the waterstop belt can be ensured, and the position deviation of the waterstop belt can be reduced; on the other hand, through the slidable abutment plate, the freedom of the upper plate when moving can be increased, thereby reducing the interference caused by deflecting the upper plate.

[0023] Preferably, the upper portion of the connecting strip is fixedly connected to the first vertical plate, and the lower plate is fixed with a positioning rod horizontally penetrating the lower portion of the connecting strip; the positioning rod is threadedly connected with a first nut, and the first nut restricts the positioning rod from detaching from the connecting strip.

[0024] By adopting the above technical scheme, in the process of resetting and deflecting the upper plate, the lower part of the connecting strip moves in a circular arc, and due to the elasticity of the abutment plate, the upper plate has the freedom of radial position adjustment, so the movement path of the connecting strip can be radially corrected, that is, two movement adjustment methods. After the upper plate is reset and deflected, the elastic force of the compression spring forces the upper plate to have an upward trend, so that the positioning rod and the positioning hole fit more closely, thereby completing the pre-installation of the upper plate, and finally locking the first nut to complete the complete installation; utilizing the reset and deflection movement of the upper plate and the radial correction capability of the upper plate, the pre-installation of the upper and lower plates is completed. In this way, the manpower for installation and construction can be reduced, which is convenient and quick.

[0025] A targeted water-stopping method for mountain tunnel construction comprises the following steps: firstly, a prefabricated water-stopping strip is installed by a steel component, a fixed connection between a template component and a steel component is completed by a fixing component, and it is ensured that the template component blocks the end of a secondary lining to be poured, thereby completing the installation of a composite template unit; then, the secondary lining concrete is poured, and during the pouring, it is necessary to ventilate the drainage pipe for pressure-maintaining treatment, and after the secondary lining concrete meets the design requirements, the template component and the steel component are disassembled in turn, and the exhaust pipe is deflated; then, a limiter that restricts the sliding of a cleaning rod is unlocked, and the thorn head can be driven to pierce a barrier membrane under the elastic force of an elastic pusher.

[0026] By adopting the above technical solution, after the poured concrete is dry, the limit piece that restricts the sliding of the cleaning rod is released, and the thorn head can be driven to pierce the barrier membrane under the elastic force of the spring, and cooperate with the cleaning component to brush off the accumulated salt, so that the water retained on the water stop belt can subsequently enter the drainage hole through the drainage hole.

[0027] In summary, this application has the following beneficial effects: 1. By setting up a barrier film, when pouring concrete, it is necessary to ventilate the drainage pipe to maintain pressure, so as to reduce the possibility of the isolation film being concave or broken by the pressure of the concrete. After the poured concrete is dry, the limiter that restricts the sliding of the thorn head is released, and the thorn head can be driven to pierce the barrier film under the elastic force of the spring, so that the water retained on the water stop can enter the drainage hole through the drainage hole.

[0028] 2. By providing a cleaning member, the cleaning rod is driven to slide through the drainage hole under the elastic force of the elastic pushing member and abut against the inner wall of the drainage hole. When water is retained on the water stop belt and flows to the drainage hole, its own water pressure is greater than the elasticity of the elastic pushing member, which pushes the cleaning rod to move away from the drainage hole and retreat into the drainage pipe, and drives the brush at this time to clean the inner wall of the drainage hole. 3. By providing an upper plate and a lower plate that can cooperate with each other, the position of the waterstop is fixed to improve the integrity and waterproofness of the waterstop. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application; Figure 2 is a schematic diagram of the cross-sectional structure of the drainage pipe in Example 1 of the present application; Figure 3 is a schematic diagram of the structure of the barrier film in Example 1 of the present application; Figure 4 is a schematic cross-sectional structure diagram of the limiting rod and the telescopic sleeve in Example 1 of the present application; Figure 5 is a schematic diagram of the structure of the steel component in Example 1 of the present application; Figure 6 is a schematic side view of the steel component in Example 1 of the present application; Figure 7 yes Figure 5 A local enlarged schematic diagram of part A in FIG. Figure 8 yes Figure 1 A partial enlarged schematic diagram of part B in FIG. Fig. 9 It is a schematic diagram of the structure of the threaded hole in Example 1 of the present application; Fig.10 It is a schematic diagram of the structure of the limiting component in Example 2 of the present application.

[0030] Explanation of reference numerals: 1. water stop; 11. water stop body; 12. side wing; 2. steel component; 21. upper plate; 211. flat plate; 212. first vertical plate; 213. second vertical plate; 2131. sliding cavity; 2132. abutting plate; 2133. compression spring; 22. lower plate; 221. positioning rod; 222. limiting sleeve; 223. first nut; 23. connecting strip; 231. sliding groove; 232. threaded hole; 24. elastic thin rod; 241. screw rod; 242. second nut; 3. template component; 31. wooden mold; 4. fixing component; 41. first fixing rib; 42 , second fixing rib; 43, third fixing rib; 5, drain pipe; 51, drain hole; 52, barrier film; 53, thorn head; 54, cleaning piece; 541, cleaning rod; 542, brush; 55, connecting rod; 56, hook; 6, elastic pushing piece; 61, telescopic sleeve; 611, fixing part; 612, sliding part; 62, spring; 7, limiting piece; 71, first connecting rope; 711, first adhesive tape; 72, second connecting rope; 73, second adhesive tape; 8, adjusting plate; 81, sliding bar; 82, first limiting ring; 83, second limiting ring; 84, third limiting ring; 9, limiting assembly. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-10 , further details of this application are given.

[0032] The embodiments of the present application disclose a targeted water stopping device and method for mountain tunnel construction.

[0033] Example: A targeted water-stopping device for mountain tunnel construction, referring to Figure 1 It includes a plurality of composite formwork units which are spliced ​​and arranged in a ring direction. Each composite formwork unit is spliced ​​along a ring direction to jointly seal the end of the secondary lining to facilitate the subsequent concrete pouring.

[0034] Among them, the composite formwork unit specifically includes a waterstop 1, a steel component 2, a formwork component 3 and a fixing component 4, wherein the waterstop 1 is fixedly connected to the steel component 2, and the steel component 2, as a carrier of the composite formwork unit, has a relatively stable structure and is fixedly connected to the ribs of the lining trolley; and the formwork component 3 is fixedly connected to the steel component 2 through the fixing component 4, and the formwork component 3 and the steel component 2 are combined to jointly seal the end of the secondary lining.

[0035] Reference Figure 1 , Figure 2The waterstop 1 specifically includes a waterstop body 11 and side wings 12 arranged on both sides of the waterstop 1. A drain pipe 5 is arranged on the waterstop body 11. Two drain pipes 5 are arranged and are respectively fixedly connected to the middle part of the waterstop body 11 and between the two side wings 12. The drain pipe 5 is provided with a drain hole 51 for discharging the water retained on the waterstop 1 through the drain pipe 5. A plurality of drain holes 51 are arranged at intervals along the length direction of the drain pipe 5.

[0036] Reference Figure 2 , Figure 3 In order to reduce the possibility of the drainage hole 51 being blocked by external substances or subsequently poured concrete, in this embodiment, a barrier film 52 is fixed to the outer peripheral wall of the drainage pipe 5, and the barrier film 52 covers the drainage hole 51. In the drainage pipe 5, thorn heads 53 for piercing the barrier film 52, cleaning members 54 arranged on the thorn heads 53, elastic pushing members 6 for pushing the cleaning members 54 to move toward the barrier film 52, and limiting members 7 for limiting the sliding of the cleaning members 54 are gradually arranged in the direction away from the drainage hole 51. In this embodiment, the number of limiting members 7, elastic members and cleaning members 54 is the same as the number of drainage holes 51. Before the poured concrete dries, the limiter 7 is used to limit the sliding of the spike 53, so that the barrier membrane 52 can protect the drainage hole 51; after the poured concrete rod, with the limiter 7 unlocked, the elastic force of the elastic pusher 6 drives the cleaning member 54 and the spike 53 to move toward the drainage hole 51, so that the spike 53 pierces the barrier membrane 52, so that the water subsequently retained in the waterstop 1 can enter the drainage pipe 5 through the drainage hole 51 and be discharged.

[0037] The cleaning member 54 specifically includes a cleaning rod 541 and a plurality of brushes 542 disposed around the outer peripheral wall of the cleaning rod 541. In this embodiment, the diameter of the cleaning rod 541 may be equal to or smaller than the diameter of the drain hole 51. In this embodiment, the diameter of the cleaning rod 541 is slightly smaller than the diameter of the drain hole 51, wherein a plurality of brushes 542 are disposed at intervals along the length direction of the cleaning rod 541. At this time, the thorn head 53 is fixedly connected to the end face of the cleaning rod 541 close to the drain hole 51, and a plurality of thorn heads 53 are disposed at intervals around the axis of the cleaning rod 541. The cleaning rod 541 is slidably disposed in the drain hole 51 and abuts against the inner peripheral wall of the drain hole 51 under the elastic force of the elastic pusher 6, and also drives the thorn head 53 to pierce the barrier film 52.

[0038] Reference Figure 3 , Figure 4, wherein the elastic pusher 6 specifically includes a telescopic sleeve 61 and a spring 62 built into the telescopic sleeve 61. In this embodiment, the telescopic sleeve 61 is a rubber corrugated hose. The telescopic sleeve 61 specifically includes a fixed portion 611 and a telescopic portion. The fixed portion 611 is arranged away from the cleaning rod 541. The fixed portion 611 is symmetrically provided with a connecting rod 55 along its own axis. The connecting rod 55 is fixedly connected to the inner wall of the drain pipe 5. The telescopic portion is coaxially sleeved on the cleaning rod 541. The cleaning rod 541 is away from the drain hole 51 and is consistently fixedly penetrated on the end surface of the telescopic portion away from the fixed portion 611. The spring 62 is sleeved on the end surface of the cleaning rod 541, and the two ends of the spring 62 are respectively fixed to the opposite two end surfaces of the telescopic sleeve 61. At this time, the spring 62 forces the telescopic portion to move toward the direction close to the drain hole 51, thereby driving the cleaning rod 541 and the thorn head 53 to move toward the direction close to the drain hole 51. When the concrete is not dry, the thorn head 53 first punctures the isolation membrane. When the concrete is dry, the thorn head 53 can puncture the salt accumulated in the drainage hole 51 so as to clean some stubborn salt accumulation.

[0039] In this embodiment, the limiting member 7 includes a first connecting rope 71 detachably connected to the cleaning rod 541 or the telescopic sleeve 61, a second connecting rope 72 fixed to the first connecting rope 71, and a hook 56 fixed to the inner peripheral wall of the pipe opening of the drain pipe 5. Specifically, the first connecting rope 71 is detachable. Specifically, the first connecting rope 71 is bonded with a first adhesive tape 711 at one end away from the second connecting rope 72. In this embodiment, the two ends of the first adhesive tape 711 are symmetrically arranged along the axis of the cleaning rod 541 and are both bonded to the outer peripheral wall of the cleaning rod 541. The middle part of the first adhesive tape 711 is bonded to the end surface of the telescopic sleeve 61 away from the cleaning rod 541. The number of the first connecting ropes 71 is the same as the number of the drain holes 51. Several first connecting ropes 71 are fixedly connected to one second connecting rope 72. The second connecting rope 72 is tied to the hook 56, specifically a slipknot arrangement, so as to facilitate disassembly. The second connecting rope 72 is pulled to drive several first connecting ropes to control the cleaning member 54.

[0040] Reference Figure 1 , Figure 5 , wherein the steel component 2 includes an upper plate 21 and a lower plate 22 arranged along the length direction of the composite formwork unit and a connecting strip 23 arranged between the upper plate 21 and the lower plate 22, wherein the lower plate 22 is arranged vertically, and the lower plate 22 is fixedly connected to the ribs of the lining trolley by bolts and nuts, and the middle position of the waterstop 1 is placed on the upper part of the lower plate 22, and one half of the waterstop 1 is located in the secondary lining to be poured, and the other half is naturally bent downward and is located in the accommodating cavity formed between the lower part of the formwork component 3 and the lower plate 22.

[0041] In this embodiment, the upper plate 21 is located above the lower plate 22. The upper plate 21 specifically includes a flat plate 211, a first vertical plate 212 and a second vertical plate 213. The first vertical plate 212 is fixed to the upper surface of the flat plate 211 on one side in the width direction, and the second vertical plate 213 is fixed to the lower surface of the flat plate 211 on the other side in the width direction. The lower part of the second vertical plate 213 abuts against the middle position of the waterstop strip 1 to tightly fix the waterstop strip 1.

[0042] In this embodiment, there are two connecting strips 23, and the two connecting strips 23 are respectively located at one end of the composite formwork unit, and the formwork assembly 3 is located between the two connecting strips 23. The upper part of the connecting strip 23 is welded and fixedly connected to the outer surface of the first vertical plate 212, and the outer surface of the lower plate 22 is vertically fixed with a positioning rod 221 that passes through the lower end of the connecting strip 23. The outer peripheral wall of the positioning rod 221 is fixedly connected to a limiting sleeve 222, and the two end surfaces of the limiting sleeve 222 respectively abut against the opposite surfaces of the lower plate 22 and the connecting strip 23. The positioning rod 221 is threadedly connected with a first nut 223. After the first nut 223 is tightened, the connecting strip 23 is connected to the lower plate 22, thereby completing the fixed connection between the upper plate 21 and the lower plate 22, that is, realizing the detachable fixation between the first vertical plate 212 and the lower plate 22.

[0043] Reference Figure 5 , Figure 6 A sliding cavity 2131 is opened in the lower part of the second vertical plate 213 in the radial direction, and an abutment plate 2132 is slidably connected in the sliding cavity 2131. The length of the abutment plate 2132 is equal to the length of the second vertical plate 213. A compression spring 2133 is also arranged in the sliding cavity 2131. The compression spring 2133 is arranged radially. The elastic force of the compression spring 2133 forces the abutment plate 2132 to move radially downward to abut against the middle part of the upper surface of the waterstop belt 1, that is, the abutment plate 2132 and the lower plate 22 cooperate to clamp the waterstop belt 1 therein, thereby ensuring the position stability of the waterstop belt 1.

[0044] Reference Figure 1 , Figure 7 , the first vertical plate 212 is provided with three elastic thin rods 24 arranged at intervals along its own length direction. In this embodiment, the elastic thin rods 24 are made of plastic material, and the elastic thin rods 24 extend downward toward the fixed half-width portion of the water stop 1. A screw 241 is provided at one end of the elastic thin rod 24, and a through hole for the screw 241 to pass through is provided on the first vertical plate 212. The screw 241 is threadedly connected with a second nut 242, that is, one end of the elastic thin rod 24 is detachably connected to the first vertical plate 212; a hook body is fixed at the other end of the elastic thin rod 24, and the hook tip of the hook body is tilted downward and arranged toward the first vertical plate 212, and the hook body hooks the free side of the fixed half-width of the water stop 1, that is, the fixed half-width portion of the water stop 1 is limited by the hook body to keep the fixed half-width portion of the water stop 1 as straight as possible to ensure its water-blocking effect.

[0045] The connecting bar 23 is provided with an adjustment plate 8, which fits the outer surface of the first vertical plate 212. The adjustment plate 8 is fixed with a slide bar 81. The outer surface of the connecting bar 23 is provided with a slide groove 231 along its own length direction. Through the cooperation between the slide bar 81 and the slide groove 231, the adjustment plate 8 and the connecting bar 23 are relatively slidably arranged.

[0046] Reference Figure 1 , Figure 8 The fixing assembly 4 includes a first fixing rib 41, a second fixing rib 42 and a third fixing rib 43. The first vertical plate 212 is provided with a first limiting ring 82 for the first fixing rib 41 to pass through and connect, so as to fix the position of the first fixing rib 41. The first fixing rib 41 is located on the side of the template assembly 3 away from the first vertical plate 212, that is, the template assembly 3 is located between the first fixing rib 41 and the first vertical plate 212, and the first fixing rib 41 is also provided with a limiting assembly 9 for limiting the template assembly 3.

[0047] The slide bar 81 is fixed with a second limiting ring 83 for the second fixing rib 42 to pass through and a third limiting ring 84 for the third fixing rib 43 to pass through. The second fixing rib 42 abuts against the outer surface of the lower part of the template assembly 3, and the third fixing rib 43 abuts against the bottom surface of the template assembly 3. That is, the first fixing rib 41, the second fixing rib 42, the third fixing rib 43 and the limiting assembly 9 cooperate together to achieve the installation and fixation of the template assembly 3.

[0048] And when the adjustment plate 8 slides radially, it can drive the formwork assembly 3 to move radially through the second fixing ribs 42 and the third fixing ribs 43, so that the upper part thereof abuts against the surface of the initial support to reduce the occurrence of concrete leakage.

[0049] Back to Figure 1 The template assembly 3 includes a plurality of wooden molds 31, each wooden mold 31 is arranged side by side along the length direction of the composite template unit, the long sides of adjacent wooden molds 31 are abutted, and the long sides of each wooden mold 31 are parallel.

[0050] Reference Fig. 9 In this embodiment, the limiting component 9 is specifically a limiting bolt threadedly connected to the inner wall of the slide groove 231, and the limiting bolt abuts against the second limiting ring. The inner wall of the slide groove 231 is provided with threaded holes 232 for threaded connection of the bolt at intervals in the length direction thereof, so as to limit the sliding of the third fixing rib 43, that is, to limit the sliding of the adjustment plate 8.

[0051] The present application also discloses a targeted water stopping method for mountain tunnel construction, comprising the following steps: First, fix the lower plate 22 to the side ribs of the lining trolley, and then place the middle part of the waterstop 1 on the upper part of the lower plate 22, so that half of the waterstop 1 is located in the secondary lining to be poured, and the other half is naturally bent and exposed.

[0052] Then move the upper plate 21 so that the second vertical plate 213 is located directly above the lower plate 22, and then move the upper plate 21 downward so that the abutment plate 2132 elastically abuts against the middle of the upper surface of the waterstop 1 to preliminarily fix the position of the waterstop 1, and then use the abutment point as a base point to deflect the upper plate 21 toward the depth of the secondary lining; during this period, the elastic thin rod 24 forces the hook body to tightly abut against the upper surface of the fixed half-width portion of the waterstop 1, and when the upper plate 21 is deflected to the edge of the fixed half-width portion of the waterstop 1 where the hook body is located, the upper plate 21 is reset and deflected so that the hook body hooks the edge of the waterstop 1, and gradually drives the fixed half-width portion of the waterstop 1 to move and deform to a straight state.

[0053] And in the process of resetting and deflecting the upper plate 21, the lower part of the connecting strip 23 makes a circular motion in the direction close to the positioning rod 221, and utilizes the elasticity of the abutment plate 2132 to radially correct the movement path of the connecting strip 23, that is, two motion adjustment methods are used to complete the pre-installation of the upper plate 21, and then pre-tighten the first nut 223 to preliminarily limit the positioning rod 221.

[0054] The wooden formwork 31 is inserted, and the first fixing rib 41, the second fixing rib 42 and the third fixing rib 43 are used to preliminarily limit the wooden formwork 31. At this time, the inner surface of the upper part of the wooden formwork 31 is in contact with the outer surface of the first vertical plate 212; then, the sliding adjustment plate 8 is used to drive the entire wooden formwork 31 to move upward to ensure that the formwork assembly 3 blocks the end of the secondary lining to be poured; during the movement of the wooden formwork 31, the bolts are threadedly connected to the threaded holes 232 at the corresponding height, so that the wooden formwork 31 will not move in the opposite direction and break away from the initial support. The above operations are repeated to gradually complete the installation of the entire end composite formwork, and then the secondary lining concrete is poured.

[0055] After the secondary lining concrete reaches the design requirements, loosen the first nut 223 , then loosen the bolt, then release the screw rod 241 and the second nut 242 , and finally remove the upper plate 21 .

[0056] Embodiment 2: Reference Fig.10 , which is different from Example 1, is that the limiting member 7 is specifically a second tape 73 bonded to the cleaning rod 541. In this embodiment, the second tape 73 is a water-soluble tape, and the two ends of the second tape 73 are respectively arranged on both sides of the cleaning rod 541. The second tape 73 is wrapped around the end surface of the telescopic sleeve 61 away from the cleaning rod 541, and the middle part of the second tape 73 is bonded to the lower end surface of the telescopic sleeve 61, so that the second tape 73 is arranged in a U shape.

[0057] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A targeted water-stopping device for mountain tunnel construction, characterized in that: The composite formwork unit comprises a plurality of composite formwork units which are spliced ​​and arranged in an annular direction, the composite formwork unit comprising a water stop strip (1), a steel component (2) for fixing the position of the water stop strip (1), a formwork component (3) detachably connected to the steel component (2), and a fixing component (4) for connecting the formwork component (3) and the steel component (2); a drainage pipe (5) is arranged on the water stop strip (1), and a drainage hole (51) is arranged on the drainage pipe (5) for discharging water retained on the water stop strip (1) through the drainage pipe (5); a barrier film (52) is fixed to the outer peripheral wall of the drainage pipe (5), and the barrier film (52) covers the drainage hole (51), and the drainage pipe (5) is directed away from the drainage hole (51). ) direction, a piercing head (53) for piercing the barrier film (52), a cleaning member (54) arranged on the piercing head (53), an elastic pushing member (6) for pushing the cleaning member (54) to move in a direction close to the barrier film (52), and a limiting member (7) for limiting the sliding of the cleaning member (54); the cleaning member (54) comprises a cleaning rod (541) and a plurality of brushes (542) arranged around the outer peripheral wall of the cleaning rod (541); the piercing head (53) is fixedly connected to the end surface of the cleaning rod (541) close to the drainage hole (51); the cleaning rod (541) is slidably penetrated through the drainage hole (51) and abuts against the inner peripheral wall of the drainage hole (51) under the elastic force of the elastic pushing member (6).

2. A targeted water-stopping device for mountain tunnel construction according to claim 1, characterized in that: The elastic pusher (6) comprises a telescopic sleeve (61) and a spring (62) built into the telescopic sleeve (61); the telescopic sleeve (61) is a rubber bellows; one end of the cleaning rod (541) away from the drain hole (51) is fixedly inserted into the telescopic sleeve (61); a connecting rod (55) is provided between the outer peripheral wall of the telescopic sleeve (61) and the inner wall of the drain pipe (5); two ends of the spring (62) are respectively fixed to two opposite inner end surfaces of the telescopic sleeve (61); the spring (62) forces the cleaning rod (541) to move in a direction close to the drain hole (51).

3. A targeted water-stopping device for mountain tunnel construction according to claim 2, characterized in that: The limiting member (7) comprises a first connecting rope (71) detachably connected to the cleaning rod (541) or the telescopic sleeve (61), a second connecting rope (72) fixed to the first connecting rope (71), and a hook (56) fixed to the inner peripheral wall of the pipe opening of the drainage pipe (5), wherein the second connecting rope (72) is tied to the hook (56).

4. The targeted water-stopping device for mountain tunnel construction according to claim 3 is characterized in that: A plurality of drainage holes (51) are arranged at intervals along the length direction of the drainage pipe (5); adjacent first connecting ropes (71) are connected to the same second connecting rope (72); one end of the first connecting rope (71) away from the second connecting rope (72) is bonded with a first adhesive tape (711); both ends of the first adhesive tape (711) are bonded to the cleaning rod (541); and the middle portion of the first adhesive tape (711) is bonded to the end surface of the telescopic tube away from the cleaning rod (541).

5. The targeted water-stopping device for mountain tunnel construction according to claim 2 is characterized in that: The limiting member (7) comprises a second adhesive tape (73) bonded to the cleaning rod (541), the two ends of the second adhesive tape (73) being respectively arranged on both sides of the cleaning rod (541), the second adhesive tape (73) being wound around the end surface of the telescopic sleeve (61) away from the cleaning rod (541), the adhesive tape being bonded to the lower end surface of the telescopic sleeve (61) so that the second adhesive tape (73) is arranged in a U-shape, and the second adhesive tape (73) is a water-soluble adhesive tape.

6. The targeted water-stopping device for mountain tunnel construction according to claim 1 is characterized in that: The steel component (2) comprises an upper plate (21) and a lower plate (22) arranged along the length direction of the composite formwork unit, and a connecting strip (23) arranged between the upper plate (21) and the lower plate (22); the lower plate (22) is used to be fixed to the side ribs of the lining trolley; the upper plate (21) comprises a flat plate (211), a first vertical plate (212) fixed to the upper surface of one side of the flat plate (211) in the width direction, and a second vertical plate (212) fixed to the lower surface of the other side of the flat plate (211) in the width direction. The lower portion of the second vertical plate (213) and the upper portion of the lower plate (22) are simultaneously in contact with the middle portion of the water stop strip (1), and the first vertical plate (212) and the lower plate (22) are detachably fixed via a connecting strip (23); the template assembly (3) is detachably fixed to the first vertical plate (212) via a fixing assembly (4), and a receiving cavity for receiving an exposed half of the water stop strip (1) is formed between the lower portion of the template assembly and the lower plate (22).

7. A targeted water-stopping device for mountain tunnel construction according to claim 6, characterized in that: The first vertical plate (212) is detachably connected to a plurality of elastic thin rods (24) extending downwardly and toward the fixed half-width portion of the water stop belt (1); a hook body is provided at the free end of the elastic thin rod (24); the hook tip of the hook body is inclined downwardly and arranged toward the first vertical plate (212); and the hook body hooks the free side edge of the fixed half-width of the water stop belt (1).

8. The targeted water-stopping device for mountain tunnel construction according to claim 7 is characterized in that: The lower part of the second vertical plate (213) is connected to an abutment plate (2132) in a radially sliding manner, and a compression spring (2133) is provided between the second vertical plate (213) and the abutment plate (2132), and the compression spring (2133) forces the bottom surface of the abutment plate (2132) to abut against the upper surface of the water stop strip (1).

9. The targeted water-stopping device for mountain tunnel construction according to claim 7 is characterized in that: The upper portion of the connecting strip (23) is fixedly connected to the first vertical plate (212), and the lower plate (22) is fixed with a positioning rod (221) horizontally penetrating the lower portion of the connecting strip (23); the positioning rod (221) is threadedly connected with a first nut (223), and the first nut (223) restricts the positioning rod (221) from detaching from the connecting strip (23).

10. A method for targeted water stopping in mountain tunnel construction using the method of claim 1, comprising the following steps: first, installing a prefabricated water stop strip (1) through a steel component (2), completing the fixed connection between the template component and the steel component (2) through a fixing component (4), and ensuring that the template component blocks the end of the secondary lining to be poured, thereby completing the installation of a composite template unit; then starting to pour the secondary lining concrete. During the pouring, it is necessary to ventilate the drainage pipe (5) to maintain the pressure. After the secondary lining concrete meets the design requirements, the template component and the steel component (2) are removed in turn, and the exhaust pipe is deflated; then, the limit member (7) that limits the sliding of the cleaning rod (541) is unlocked, and the thorn head (53) can be driven to pierce the barrier membrane (52) under the elastic force of the elastic push member (6).

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