Drainage type cable trench cover plate and tunnel drainage structure

Abstract

The utility model discloses a drainage type cable trench cover plate and a tunnel drainage structure, which are characterized in that underground water is intensively guided and drained by drilling radial drainage holes in the side wall foot of a tunnel, a buffer platform and a cable trench connected with the buffer platform are arranged below the water outlet ends of the radial drainage holes, and the drainage type cable trench cover plate is arranged at the top of the cable trench. Water gushing out of the radial drainage holes is guided and drained into the cable trench in a side drainage mode and then converged into a central drainage ditch of the tunnel through the drainage grooves in the bottom of the cable trench and the transverse drainage ditches. The tunnel underground water drainage structure is simple in structure, convenient and efficient to construct and low in construction cost, can effectively cope with the sudden underground water gushing situation of an operating tunnel, effectively avoids potential structural safety hazards caused by high-pressure water impact, and greatly improves the safety and durability. The side drainage mode is adopted to guide and drain accumulated water, the drainage effect is good, the interior of the cable trench is not prone to being affected with damp, the service life of the cable is prolonged, and the use safety of the cable is improved.

Description

Technical Field

[0001] The utility model relates to a drainage type cable trench cover plate and a tunnel drainage structure, belonging to the technical fields of tunnel cable trenches and tunnel drainage. Background Technique

[0002] The cover plates for tunnel cable trenches generally adopt a fully enclosed or top drainage form. The fully enclosed cable trench has weak drainage function, resulting in serious water accumulation in the tunnel during rainy days due to untimely drainage of the cover plate. The top drainage type cable trench has poor waterproof performance and is prone to leakage of rainwater or other accumulated water into the cable trench, posing a hidden danger to the safe operation of the cable. Patent document CN207339208 U discloses a ventilation and rainproof under-drainage cable trench cover plate, including a cable trench cover plate and a water receiving tray. At least two long strip-shaped ventilation holes are arranged on the cable trench cover plate. A rectangular small animal prevention net capable of covering all ventilation holes is arranged at the bottom of the cable trench cover plate. Fixing rods are arranged at the four corners of the small animal prevention net. The water receiving tray is arranged at the bottom end of the fixing rod, and a drain pipe is arranged on one side of the water receiving tray. By arranging a number of long strip-shaped holes on the cable trench cover plate, the moisture in the cable trench can be effectively discharged. At the same time, a water receiving tray and a drain pipe are arranged below the cable trench cover plate to effectively discharge the rainwater entering from the ventilation holes of the cable trench cover plate directly, avoiding the direct entry of rainwater into the cable trench. However, the structure of this device is complex, the construction cost invested is relatively high, and when the drainage volume is large, the use capacity of the water receiving tray is limited.

[0003] In addition, the problem of water leakage from tunnel linings 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, accidents such as traffic safety and structural safety may be induced, and the potential hazards cannot be underestimated. Especially in karst development 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 concentrated jet, seriously affecting the normal operation in the tunnel. For the above-mentioned concentrated 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 surface of the lining all have certain structural safety hazards. The long-term impact of a large water pressure is very likely to cause the drain pipe only covered by a thin layer of concrete to be squeezed into the tunnel, or cause the diversion groove anchored on the surface of the lining to loosen and fall off.

[0004] Therefore, in view of the above situation, it is of great practical significance to study a drainage type cable trench cover plate and a tunnel drainage structure. Content of the Utility Model

[0005] In view of this, the purpose of the present utility model is to provide a drainage type cable trench cover plate and a tunnel drainage structure to at least solve the problems mentioned in the background technique.

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

[0007] A drainage-type cable trench cover plate, comprising a cover plate body, with grooves provided on at least one side of the bottom of the cover plate body, and a number of pads higher than the grooves are provided in the grooves, so that the cover plate body is lifted by the pads to form a drainage gap; and the cover plate body is inclined downward on the side opposite to the drainage gap, facilitating the collection and discharge of water flow.

[0008] Furthermore, the pads are at least two pieces symmetrically arranged on both sides in the grooves.

[0009] Furthermore, the cover plate body and the pads are of an integrally formed structure or the pads are detachably connected to the cover plate body.

[0010] A tunnel drainage structure based on the drainage-type cable trench cover plate, comprising a radial drain hole provided at the arch foot position of the side wall in the water accumulation section behind the tunnel lining. A perforated steel pipe with drainage holes is provided in the radial drain hole. The water outlet end of the perforated steel pipe is arranged downward, and a buffer platform and a cable trench connected thereto are provided below it. The drainage-type cable trench cover plate is arranged on the top of the cable trench, with a drainage groove provided at the bottom. The drainage groove is connected to the central drainage ditch of the tunnel through a transverse drainage ditch.

[0011] Furthermore, cables are placed in the cable trench. The drainage-type cable trench cover plate is arranged on the top of the cable trench and the groove is close to the buffer platform side, and a drainage gap is formed between the bottom of the drainage-type cable trench cover plate and the side wall of the cable trench close to the buffer platform side through the pads.

[0012] Furthermore, the drainage-type cable trench cover plate is inclined downward on the side opposite to the buffer platform, facilitating the collection and discharge of water flow.

[0013] Furthermore, the inclination angle of the drainage-type cable trench cover plate is 5 - 10 degrees.

[0014] Furthermore, the buffer platform is arranged at the corner of the tunnel side wall and is inclined downward on the side opposite to the cable trench.

[0015] Furthermore, a water collecting trough is also provided on the side of the buffer platform close to the cable trench.

[0016] Furthermore, a rubber pad is laid on the top surface of the buffer platform, and a number of diversion grooves are provided on the rubber pad.

[0017] Compared with the prior art, the beneficial effects of the present utility model are:

[0018] The utility model relates to a drainage type cable trench cover plate, which has a simple structure and low cost. The side drainage method is adopted for water accumulation drainage, which not only has a good drainage effect, but also makes the cable trench not easy to be affected by moisture, improving the service life and use safety of the cable. The utility model also relates to a tunnel drainage structure based on the drainage type cable trench cover plate, which is convenient and efficient in construction and has low construction cost. By drilling radial drainage holes at the bottom of the tunnel side wall to centrally drain groundwater, a buffer platform and a cable trench connected with the buffer platform are arranged below the water outlet end of the radial drainage hole, and a drainage type cable trench cover plate is arranged at the top of the cable trench. The water gushing out from the radial drainage hole is drained into the cable trench by the side drainage method, and then flows into the central drainage ditch of the tunnel through the drainage groove at the bottom of the cable trench and the transverse drainage ditch. It makes use of the advantage that water flows to lower places to make the accumulated water flow into the drainage type cable trench and finally be drained into the tunnel central drainage ditch, which can effectively cope with the sudden groundwater gushing in the operating tunnel, effectively avoid the potential structural safety hazards brought by the impact of high-pressure water, and greatly improve the safety and durability of the tunnel groundwater drainage structure.

[0019] Other advantages, objectives and features of the present utility model will be described to some extent in the subsequent description, 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 realized and obtained through the following description. Brief Description of the Drawings

[0020] 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 with reference to the drawings, where:

[0021] Figure 1 is the side structure schematic diagram of the present utility model;

[0022] Figure 2 is the structure schematic of the drainage type cover plate Figure 1 ;

[0023] Figure 3 is the structure schematic of the drainage type cover plate Figure 2 .

[0024] In the figure: 1, cover plate body; 2, groove; 3, spacer block; 4, radial drain hole; 5, perforated steel pipe; 6, buffer platform; 6.1, water collecting trough; 7, cable trench; 8, drainage groove; 9, transverse drainage ditch, 10, rubber pad. Detailed Description of the Embodiment

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model 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 in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0026] As Figures 1 - 3 shown, the first embodiment of the present utility model provides a drainage type cable trench cover plate, which includes a cover plate body 1, and at least one groove 2 is provided on at least one side of the bottom of the cover plate body 1. A plurality of pads 3 higher than the groove 2 are provided in the groove 2, so that the cover plate body 1 is raised by the pads 3 to form a drainage gap, and the cover plate body 1 is inclined downward on one side relative to the drainage gap for facilitating the collection and discharge of water flow.

[0027] The pads 3 are at least two pieces symmetrically arranged on both sides in the groove 2.

[0028] The cover plate body (1) can be a concrete structure, an iron cover plate, or a composite material cover plate. The cover plate body 1 and the pads 3 are of an integrally formed structure. Or the pads 3) are detachably connected to the cover plate body 1, such as by bolt connection or anchor connection, etc.

[0029] Based on the above-mentioned tunnel drainage structure of the drainage type cable trench cover plate, it includes a radial drain hole 4 provided at the arch foot position of the side wall in the water accumulation section behind the tunnel lining. A perforated steel pipe 5 with drainage holes is provided in the radial drain hole 4. The water outlet end of the perforated steel pipe 5 is arranged downward, and a buffer platform 6 and a cable trench 7 connected thereto are provided below it. The drainage type cable trench cover plate is arranged on the top of the cable trench 7, and a drainage groove 8 is provided at the bottom. The drainage groove 8 is connected to the central drainage ditch of the tunnel through a transverse drainage ditch 8.

[0030] The cable trench is longitudinally distributed on both sides of the road and cables are placed therein. The drainage type cable trench cover plate is arranged on the top of the cable trench 7 and the groove is close to one side of the buffer platform 6, and a drainage gap is formed between the bottom of the drainage type cable trench cover plate and the ditch bank on the side close to the buffer platform 6 through the pads. This structure adopts the side drainage method, which is not only simple in structure and convenient for drainage, but also can prevent the cables in the cable trench from getting damp.

[0031] The drainage type cable trench cover plate is inclined downward on one side relative to the buffer platform 6, and the inclination angle of the drainage type cable trench cover plate is 5-10 degrees.

[0032] The water outlet end of the perforated steel pipe 5 is provided with an elbow with the opening facing downward, so that the water outlet mainly flows to the buffer platform 6. Or, a water baffle is arranged at the water outlet end of the perforated steel pipe 5, so that the water flow flows to the buffer platform 6.

[0033] The buffer platform 6 is arranged at the corner of the side wall of the tunnel and is inclined downward relative to the cable trench side. Taking full advantage of the fact that water flows to lower places, a better drainage effect can be achieved.

[0034] A water collecting trough 6.1 is also provided on the side of the buffer platform 6 close to the cable trench, so that the water discharged from the radial drain holes 4 is collected in the water collecting trough 6.1 and then introduced into the cable trench 7 along the drainage gap at the bottom of the drainage type cable trench cover plate.

[0035] In addition, a rubber pad 10 is laid on the top surface of the buffer platform 6, and a number of diversion grooves are provided on the rubber pad 10, which can reduce the scouring damage of the buffer platform 6 and can also achieve the diversion and drainage of water.

[0036] The drainage trough 8 and the transverse drainage ditch 9 provided at the bottom of the cable trench are arranged in one-to-one correspondence, and the two are arranged at intervals along the longitudinal direction of the tunnel in the water accumulation section behind the tunnel lining. The arrangement intervals of the drainage trough 8 and the transverse drainage ditch 9 can be the same or different. Specifically, the arrangement intervals of the drainage trough 8 and the transverse drainage ditch 9 are appropriately densified according to the severity of the water accumulation behind the tunnel lining, which is more conducive to drainage.

[0037] The above are only the preferred embodiments of the present invention, and do not impose any form of confidentiality restrictions on the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical content of the present invention and the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A drainage type cable trench cover plate, characterized in that, It includes a cover plate body (1), a groove (2) provided on at least one side of the bottom of the cover plate body (1), and a number of pads (3) higher than the groove (2) are provided in the groove (2), so that the cover plate body (1) is lifted by the pads (3) to form a drainage gap; and the cover plate body (1) is inclined downward on one side relative to the drainage gap, facilitating the collection and discharge of water flow.

2. The drainage type cable trench cover plate according to claim 1, wherein, The pads (3) are at least two pieces symmetrically arranged on both sides in the groove (2).

3. The drainage type cable trench cover plate according to claim 1, characterized in that, The cover plate body (1) and the pads (3) are of an integrally formed structure or the pads (3) are detachably connected to the cover plate body (1).

4. A tunnel drainage structure for a drainage-type cable trench cover plate according to claim 1, characterized in that, It includes a radial drain hole (4) arranged at the arch foot position of the side wall in the water accumulation section behind the tunnel lining. A perforated steel pipe (5) with drain holes is provided in the radial drain hole (4). The water outlet end of the perforated steel pipe (5) is arranged downward, and a buffer platform (6) and a cable trench (7) connected thereto are provided below it. The drainage type cable trench cover plate is arranged on the top of the cable trench (7), and a drainage groove (8) is provided at the bottom. The drainage groove (8) is connected to the central drainage ditch of the tunnel through a transverse drainage ditch (9).

5. The tunnel drainage structure according to claim 4, characterized in that, Cables are placed in the cable trench (7). The drainage type cable trench cover plate is arranged on the top of the cable trench (7) and the groove is close to one side of the buffer platform (6), and a drainage gap is formed between the bottom of the drainage type cable trench cover plate and the side wall near one side of the buffer platform (6) through the pads.

6. The tunnel drainage structure according to claim 5, characterized in that, The drainage type cable trench cover plate is inclined downward on one side relative to the buffer platform (6), facilitating the collection and discharge of water flow.

7. The tunnel drainage structure according to claim 6, characterized in that, The inclination angle of the drainage type cable trench cover plate is 5 - 10 degrees.

8. The tunnel drainage structure according to claim 5, characterized in that, The buffer platform (6) is arranged at the corner of the tunnel side wall and is inclined downward relative to one side of the cable trench.

9. The tunnel drainage structure according to claim 8, characterized in that, A water collecting trough (6.1) is further provided on one side of the buffer platform (6) close to the cable trench.

10. The tunnel drainage structure according to claim 9, characterized in that, A rubber pad (10) is laid on the top surface of the buffer platform (6), and a number of diversion grooves are provided on the rubber pad (10).

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