Tunnel side wall water retaining structure with built-in elastic guide plate

Abstract

The utility model discloses a tunnel side wall water retaining structure with a built-in elastic guide plate, which comprises a radial drainage hole arranged at the position of a side wall arch foot of a water accumulation section behind a tunnel lining, and a steel floral tube with a drainage hole is arranged in the radial drainage hole. The water outlet end of the steel floral tube is sequentially connected with the cable trench, the transverse drainage trench and the tunnel center trench, and the longitudinal pressure relief groove is formed between the water outlet end of the steel floral tube and the cable trench and comprises an L-shaped water baffle and an elastic plate structure, wherein an opening of the L-shaped water baffle faces the water outlet end of the steel floral tube, and the elastic plate structure is arranged in the L-shaped water baffle. The device is simple in structure, low in cost, convenient and efficient in construction, small in damage to an existing tunnel structure, capable of effectively reducing the speed of water flow through an elastic plate structure which consumes impact force of the water flow through potential energy change, capable of effectively dealing with the situation of large-flow leakage of underground water in a tunnel and capable of improving the construction efficiency. And potential structural safety hazards caused by high-pressure water impact are avoided, and the safety and durability of the tunnel underground water drainage structure are greatly improved.

Description

Technical Field

[0001] The utility model relates to a water retaining structure for tunnel side walls with an internally installed elastic diversion plate, belonging to the technical field of tunnel leakage treatment construction. Background Technique

[0002] The problem of tunnel lining leakage is the most common disease in tunnel engineering. The reasons for its occurrence are diverse, and the treatment construction is extremely difficult. If the treatment is improper, it may induce accidents such as traffic safety and structural safety, and the potential hazards cannot be underestimated. Especially in karst-developed areas or water-rich sections with broken surrounding rocks, a large amount of groundwater often accumulates behind the tunnel lining and often leaks into the tunnel in a pressurized form in a jet-like manner, seriously affecting the normal operation in the tunnel. For the above-mentioned concentrated jet-like pressurized water discharge situation, the conventional treatment schemes of chiseling grooves and burying pipes for drainage inside the lining or installing diversion grooves on the lining surface for drainage all have certain structural safety hazards. The long-term impact of a large water pressure is very likely to cause the drainage pipes only covered by a thin layer of concrete to be squeezed into the tunnel, or cause the diversion grooves anchored on the lining surface to loosen and fall off.

[0003] Patent CN 207332939 U discloses a high-pressure water-rich area tunnel automatic pressure-regulating and water-discharging control device, which is arranged at the bottom of the cable troughs on both sides of the operation tunnel in the limited discharge area at the side wall feet of the high-pressure water-rich area tunnel. The water inlet of the device is connected to the groundwater seepage pipeline behind the lining, and the water outlet of the device is connected to the tunnel transverse drainage pipe. An automatic pressure-regulating and water-discharging control mechanism composed of a water control valve 100, a Y-shaped pipeline filter 200, and an adjustable water-discharging valve 300 is sequentially arranged between the water inlet and the water outlet. This automatic pressure-regulating and water-discharging device can flexibly combine the drainage outside the lining with the tunnel internal drainage system, and set the water-discharging threshold value to automatically drain water as the water volume changes, and adjust the water pressure borne by the lining. However, it has more components for automatic pressure-regulating and water-discharging, higher input costs, time-consuming and laborious installation, and when used for a long time, the filtering device and water valves need to be replaced frequently, and the input maintenance labor and financial costs are higher.

[0004] Therefore, in view of the above situation, it has great practical significance to study a water retaining structure for tunnel side walls with an internally installed elastic diversion plate. Content of the Utility Model

[0005] In view of this, the purpose of the present utility model is to provide a water retaining structure for tunnel side walls with an internally installed elastic diversion plate, so as to solve at least the problems mentioned in the background technique.

[0006] The purpose of the present utility model is achieved through the following technical solutions:

[0007] A water retaining structure for tunnel sidewalls with an internal elastic diversion plate, comprising radial drainage holes arranged at the arch feet of the sidewalls in the water accumulation section behind the tunnel lining. A perforated steel pipe with drainage holes is provided in the radial drainage holes. The water outlet end of the perforated steel pipe is successively connected to a cable trench, a transverse drainage ditch, and a tunnel central ditch. It further includes a longitudinal pressure relief groove arranged between the water outlet end of the perforated steel pipe and the cable trench. The longitudinal pressure relief groove includes an L-shaped water retaining plate with an opening facing the water outlet end of the perforated steel pipe and an elastic plate structure arranged inside the L-shaped water retaining plate. The longitudinal pressure relief groove is used to consume the impact force of the water gushing out of the perforated steel pipe by using potential energy changes, and slowly discharge it into the cable trench.

[0008] Further, according to the drilling range of the radial drainage holes, a circumferential drainage groove is also provided on the tunnel lining, and the setting range of the longitudinal pressure relief groove corresponds to the drilling ranges of the circumferential drainage groove and the radial drainage holes.

[0009] Further, the elastic plate structure includes an inclined plate arranged inside the L-shaped water retaining plate and below the water outlet end of the perforated steel pipe. The inclined plate is arranged obliquely upward relative to the water outlet end of the perforated steel pipe, and the inclined plate is fixedly connected to the inner side wall of the L-shaped water retaining plate through an elastic member.

[0010] Further, the elastic member is an arc-shaped elastic piece. The lower end of the arc-shaped elastic piece is fixedly connected to the inner side wall of the L-shaped water retaining plate, and the upper end is connected to the inclined plate.

[0011] Further, the upper end of the arc-shaped elastic piece is hinged to the inclined plate, and one side of the inclined plate away from the water outlet end of the perforated steel pipe is connected to the inner side wall of the L-shaped water retaining plate through a spring.

[0012] Further, a plurality of diversion grooves are provided on the inclined plate.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] The structure of the present utility model is simple, with low cost, convenient and efficient construction, and less damage to the existing tunnel structure. It centrally drains groundwater by drilling radial drainage holes at the tunnel sidewall feet, and a longitudinal pressure relief groove is arranged below the water outlet end of the radial drainage holes. The elastic plate structure of the longitudinal pressure relief groove includes an inclined plate fixedly connected below the water outlet end of the radial drainage hole through an elastic member. The inclined plate is arranged obliquely upward relative to the water outlet end of the perforated steel pipe. When the high-pressure groundwater gushing out from the radial drainage hole impacts on the inclined plate, most of the water flows upward along the inclined plate under its own inertia, and the impact force of the water flow is consumed by potential energy changes. At the same time, the elastic member can provide a certain elastic buffer force for the inclined plate, which can further consume the impact force of the water flow and effectively decelerate the water flow. Compared with the conventional measure of using a drainage pipe to drain groundwater, the present utility model greatly improves the ability to drain and decompress tunnel groundwater, can effectively cope with the situation of large-flow leakage of groundwater in the tunnel, effectively avoids the potential structural safety hazards brought by high-pressure water impact, and greatly improves the safety and durability of the tunnel groundwater drainage structure.

[0015] Other advantages, objectives and features of the present utility model will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present utility model. The objectives and other advantages of the present utility model can be achieved and obtained through the following specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below in conjunction with the accompanying drawings, where:

[0017] Figure 1 is a front structural schematic diagram of the present utility model;

[0018] Figure 2 is a partial enlarged cross-sectional view of the tunnel side wall footing;

[0019] Figure 3 is a three-dimensional schematic diagram of the elastic plate structure provided in Embodiment 1 of the present utility model;

[0020] Figure 4 is a side schematic diagram of the elastic plate structure;

[0021] Figure 5 is a schematic diagram of the working principle of the elastic plate structure;

[0022] Figure 6 is a schematic diagram of the elastic plate structure provided in Embodiment 2 of the present utility model.

[0023] In the figure: 1, radial drainage holes; 2, perforated steel pipes; 3, elastic plate structure; 3.1, inclined plate; 3.2, arc-shaped elastic sheet; 3.3, spring; 3.4, diversion groove; 4, L-shaped water baffle; 4.1, upper anchoring edge; 4.2, lower anchoring edge; 4.3, drainage trough interface; 5, transverse drainage ditch; 6, central drainage ditch; 7, circumferential drainage trough. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only partial embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0025] As Figures 1 - 5As shown in the figure, the first embodiment of the present utility model provides a water retaining structure for the side wall of a tunnel with an internal elastic diversion plate, which includes a radial drainage hole 1 arranged at the arch springing position of the side wall in the water accumulation section behind the tunnel lining. A perforated steel pipe 2 with drainage holes is arranged in the radial drainage hole 1. The water outlet end of the perforated steel pipe 2 is connected to a cable trench, a transverse drainage ditch 5 and a tunnel central ditch 6 in sequence. A longitudinal pressure relief groove is arranged between the water outlet end of the perforated steel pipe 2 and the cable trench. The longitudinal pressure relief groove includes an L-shaped water retaining plate 4 with an opening facing the water outlet end of the perforated steel pipe 2 and an elastic plate structure 3 arranged inside the L-shaped water retaining plate 4. The elastic plate structure 3 uses the upward pick-up potential energy of the water flow combined with the principle of elastic shock absorption to slow down the water flow gushing out of the perforated steel pipe 2 and slowly drain it into the cable trench, effectively avoiding the potential structural safety hazards brought by the impact of high-pressure water.

[0026] According to the drilling range of the radial drainage hole 1, a circumferential drainage groove 7 is also arranged on the tunnel lining, and the setting range of the longitudinal pressure relief groove corresponds to the drilling ranges of the circumferential drainage groove 7 and the radial drainage hole 1.

[0027] The L-shaped water retaining plate 4 is made of stainless steel plate. After being impacted by the water gushing out of the radial drainage hole 1, it has the advantages of corrosion resistance and impact resistance, thus effectively avoiding the potential structural safety hazards brought by the impact of high-pressure water and greatly improving the safety and durability of the tunnel groundwater drainage structure. The elastic plate structure 3 includes an inclined plate 3.1 arranged inside the L-shaped water retaining plate 4 and below the water outlet end of the perforated steel pipe 2. The inclined plate 3.1 is inclined upward relative to the water outlet end of the perforated steel pipe 2, and the inclined plate 3.1 is fixedly connected to the inner side wall of the L-shaped water retaining plate 4 through an elastic member. During use, the high-pressure water gushing out of the radial drainage hole 1 just sprays on the inclined plate 3.1 and flows upward along the inclined plate 3.1 under its own inertia, consuming the impact force of the water flow through the change of potential energy, thereby reducing the impact of the water flow on the L-shaped water retaining plate 4 and achieving the effects of deceleration and pressure reduction. And the inclined plate 3.1 is connected through an elastic member, which can reduce the impact of high-pressure water on the inclined plate 3.1, improve the service life of the inclined plate, and at the same time, the elastic member can provide a certain elastic buffer force for the inclined plate 3.1, which can further consume the impact force of the water flow and has a better pressure reduction effect on the water flow.

[0028] Specifically, the elastic member can be an arc-shaped elastic piece 3.2. One end of the arc-shaped elastic piece 3.2 is fixedly connected to the inner side wall of the L-shaped water retaining plate 4, and the other end is connected to the bottom surface of the inclined plate 3.1.

[0029] A plurality of diversion grooves 3.4 are arranged on the top surface of the inclined plate 3.1. During use, the high-pressure water gushing out of the radial drainage hole 1 just sprays on the inclined plate 3.1 and can flow upward along the diversion grooves 3.4 on the inclined plate 3.1 under its own inertia, consuming the impact force of the water flow through the change of potential energy and reducing the impact of the water flow on the L-shaped water retaining plate 4, with a better pressure reduction effect.

[0030] The upper and lower parts of the L-shaped water baffle 4 are respectively provided with an upper anchoring edge 4.1 and a lower anchoring edge 4.2, so that the L-shaped water baffle 4 is anchored outside the longitudinal pressure relief groove by bolts. And drainage groove interfaces 4.3 are arranged at certain intervals at the upper end of the upper anchoring edge 4.1, and the arrangement positions of the drainage groove interfaces 4.3 match the positions of the circumferential drainage grooves 7 arranged in the tunnel. The surface water flow of the tunnel lining flows through the circumferential drainage groove 7 and enters the longitudinal pressure relief groove through the drainage groove interface 4.3, first impacts the inclined plate 3.1, consumes the impact force of the water flow through the elastic member, overflows into the transverse drainage ditch 5, and finally converges into the central drainage ditch 6 and is drained away.

[0031] As Figure 6 Shown in the figure, on the basis of the first embodiment, the second embodiment of the present invention provides a tunnel side wall water baffle structure with an internal elastic diversion plate. The elastic plate structure 3 includes an inclined plate 3.1 arranged in the L-shaped water baffle 4 and below the water outlet end of the steel flower tube 2. The inclined plate 3.1 is arranged obliquely upward relative to the water outlet end of the steel flower tube 2, and the inclined plate 3.1 is fixedly connected to the inner side wall of the L-shaped water baffle 4 through an elastic member. The elastic member includes an arc-shaped elastic piece 3.2 and a spring 3.3. One end of the arc-shaped elastic piece 3.2 is fixedly connected to the inner side wall of the L-shaped water baffle 4, and the other end is hinged to the inclined plate 3.1. And the side of the inclined plate 3.1 away from the water outlet end of the steel flower tube 2 is connected to the inner side wall of the L-shaped water baffle 4 through a spring 3.3. This structure makes the resilience of the inclined plate 3.1 better and can better consume the impact force of the water flow.

[0032] The above is only the preferred embodiment of the present invention, and does not impose any form of confidentiality restrictions on the present invention. Any simple modification, equivalent change and modification made to the above embodiments based on the technical content of the present invention and according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A water retaining structure for the side wall of a tunnel with an internal elastic diversion plate, comprising a radial drainage hole (1) arranged at the arch foot position of the side wall in the water accumulation section behind the tunnel lining. A perforated steel pipe (2) with drainage holes is arranged in the radial drainage hole (1). The water outlet end of the perforated steel pipe (2) is successively connected to a cable trench, a transverse drainage ditch (5) and a tunnel central ditch (6), and is characterized in that, It further includes a longitudinal pressure relief groove arranged between the water outlet end of the steel flower tube (2) and the cable trench. The longitudinal pressure relief groove includes an L-shaped water baffle (4) with an opening facing the water outlet end of the steel flower tube (2) and an elastic plate structure (3) arranged inside the L-shaped water baffle (4). The longitudinal pressure relief groove is used to consume the impact force of the water flowing out of the steel flower tube (2) by using potential energy changes and slowly discharge it into the cable trench.

2. The water retaining structure for the tunnel side wall with an internally installed elastic flow guide plate according to claim 1, characterized in that, According to the drilling range of the radial water discharge holes (1), a circumferential drainage groove (7) is also provided on the tunnel lining, and the setting range of the longitudinal pressure relief groove corresponds to the drilling ranges of the circumferential drainage groove (7) and the radial water discharge holes (1).

3. The water retaining structure for tunnel side walls with an internally installed elastic flow deflector according to claim 2, characterized in that, The elastic plate structure (3) includes an inclined plate (3.1) arranged inside the L-shaped water baffle (4) and below the water outlet end of the steel flower tube (2). The inclined plate (3.1) is arranged obliquely upward relative to the water outlet end of the steel flower tube (2), and the inclined plate (3.1) is fixedly connected to the inner side wall of the L-shaped water baffle (4) through an elastic member.

4. The water retaining structure for the tunnel side wall with an internally installed elastic flow deflector according to claim 3, characterized in that, The elastic member is an arc-shaped elastic piece (3.2). The lower end of the arc-shaped elastic piece (3.2) is fixedly connected to the inner side wall of the L-shaped water baffle (4), and the upper end is connected to the inclined plate (3.1).

5. The water retaining structure for tunnel sidewalls with an internally installed elastic flow deflector according to claim 4, characterized in that, The upper end of the arc-shaped elastic piece (3.2) is hinged to the inclined plate (3.1), and one side of the inclined plate (3.1) away from the water outlet end of the steel flower tube (2) is connected to the inner side wall of the L-shaped water baffle (4) through a spring (3.3).

6. The water retaining structure for tunnel sidewalls with an internally installed elastic flow deflector according to claim 3 or 5, characterized in that A plurality of diversion grooves (3.4) are provided on the inclined plate (3.1).

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