Partitioned drainage structure of karst water-rich tunnel

Abstract

The utility model provides a karst water-rich tunnel partition drainage structure which comprises N tunnel main holes arranged in an arrayed mode, a middle connecting channel is arranged between every two adjacent tunnel main holes for communication, N is an integer larger than or equal to 2, a drainage ditch in one tunnel main hole located on the outermost side is communicated with a drainage hole through a connecting branch hole, and the drainage ditch in the other tunnel main hole located on the outermost side is communicated with the drainage hole through a drainage branch hole. The middle connecting channel comprises a drainage channel and a pedestrian path, the drainage channel is communicated with the drainage ditches in the two adjacent tunnel main holes, and the pedestrian path is communicated with the two adjacent tunnel main holes. According to the drainage structure, water flow of all the tunnel main holes can be collected into the drainage hole to be drained, the risk of tunnel flood is reduced, and meanwhile the drainage channel and the pedestrian path are arranged together so that the construction difficulty can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel engineering, in particular to a karst water-rich tunnel partition drainage structure. Background Art

[0002] With the increase in the number of tunnels and the extension of their operating life, a large number of tunnels are frequently hit by water damage, with serious water seepage, and even water inrush and gushing, which seriously affect the construction and operation safety of tunnels. There are many reasons for tunnel water leakage, such as geological factors, construction quality factors, and design factors. Among them, geological factors and construction quality factors can be controlled through process intervention, and the defects in the current tunnel drainage system design are important factors that lead to tunnel water leakage, especially in tunnels in karst water-rich areas. Tunnel flood disasters caused by insufficient drainage system design are endless. Therefore, for tunnels in karst water-rich areas, it is of great significance to study how to adopt an effective structural system to reduce the groundwater pressure in the tunnel section and maximize the discharge of water to improve the safety of tunnel construction and operation and maintenance.

[0003] In summary, there is an urgent need for a karst water-rich tunnel partition drainage structure to solve the problems existing in the prior art. Utility Model Content

[0004] The utility model aims to provide a karst water-rich tunnel partition drainage structure, aiming to solve the problem of karst water-rich tunnel drainage. The specific technical solution is as follows:

[0005] A karst water-rich tunnel partition drainage structure comprises N tunnel main holes arranged in an array and an intermediate connecting channel is provided between two adjacent tunnel main holes for communication, wherein N is an integer greater than or equal to 2, a drainage ditch in one of the outermost tunnel main holes is connected to a drainage hole through a connecting branch hole, the intermediate connecting channel comprises a drainage channel and a pedestrian passage, the drainage channel is connected to the drainage ditches in two adjacent tunnel main holes, and the pedestrian passage is connected to the two adjacent tunnel main holes.

[0006] Preferably in the above technical solution, the elevation of the drainage tunnel is lower than the elevation of the main tunnel of the tunnel, and the bottom surface of the connecting branch tunnel and the bottom surface of the drainage channel are both provided with a slope.

[0007] Preferably in the above technical solution, the bottom surface of the connecting branch hole is step-shaped.

[0008] Preferably in the above technical solution, the position where the main tunnel is connected to the connecting branch tunnel or the intermediate connecting passage is a deepened section of the invert arch, and the drainage ditch at the deepened section of the invert arch is deepened.

[0009] Preferably in the above technical solution, the drainage ditch at the deepened section of the invert arch is connected to the connecting branch hole or the drainage channel by a concrete pipe.

[0010] Preferably in the above technical solution, an anti-scouring ditch is provided in the drainage hole, and the water flow in the connecting branch hole first enters the anti-scouring ditch and then enters the drainage hole.

[0011] Preferably in the above technical solution, the connecting branch hole is connected to the drainage hole reinforcement section of the drainage hole, and the wall thickness of the drainage hole reinforcement section is thickened.

[0012] Preferably in the above technical solution, the drainage channel and the pedestrian channel are stacked, wherein the pedestrian channel is located above the drainage channel.

[0013] Preferably in the above technical solution, the drainage ditch is located at the invert of the tunnel and below the tunnel pavement.

[0014] Preferably in the above technical solution, the drainage hole is arranged parallel to the main tunnel of the tunnel.

[0015] The application of the technical solution of the utility model has the following beneficial effects:

[0016] The utility model provides a tunnel partition drainage structure, in which the drainage ditches of adjacent tunnel main holes are connected through drainage channels, and the drainage ditch of one of the outermost tunnel main holes is connected to a drainage hole through a connecting branch hole, so that the water flow in all tunnel main holes can be smoothly collected in the drainage hole for discharge, reducing the risk of tunnel flooding, and the pedestrian passage and the drainage channel are arranged together, which is convenient for reducing the construction difficulty. The drainage hole is arranged parallel to the tunnel main hole, the drainage hole is easy to form a hole and can be used as a leading pilot hole, which is convenient for understanding the geology ahead of the tunnel excavation. The elevation of the drainage hole is lower than the elevation of the tunnel main hole, and at the same time, a slope is set on the bottom surface of the connecting branch hole and the bottom surface of the drainage channel, which can reduce the drainage pressure of the tunnel main hole, so that the water flow in all tunnel main holes can be collected in the drainage hole, and the drainage capacity is improved.

[0017] The utility model arranges an inverted arch deepening section and deepens the depth of the drainage ditch there, so that water flows at other positions of the tunnel can be gathered into the drainage ditch of the inverted arch deepening section; at the same time, an anti-scouring ditch is arranged in the drainage hole, which can prevent water flow from directly scouring the hole wall of the drainage hole, thereby ensuring the service life of the drainage hole.

[0018] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0020] Figure 1 It is a horizontal view of the partition drainage structure of the karst water-rich tunnel of the utility model;

[0021] Figure 2 It is a cross-sectional view of the partition drainage structure of the karst water-rich tunnel of the utility model along the transverse direction;

[0022] Figure 3 yes Figure 1 Lining section of the right main tunnel inverted arch deepening section of the middle tunnel;

[0023] Figure 4 yes Figure 1 A cross-section of the middle connecting channel;

[0024] Figure 5 yes Figure 1 Cross-plan view between the middle drainage tunnel and the connecting branch tunnel;

[0025] Figure 6 It is an axonometric diagram of the partition drainage structure of the karst water-rich tunnel of the utility model;

[0026] Among them, 1. spillway, 2. connecting branch tunnel, 3. left main tunnel of tunnel, 4. right main tunnel of tunnel, 5. middle connecting passage, 6. deepening section of invert arch, 7. concrete pipe, 8. drainage channel, 9. drainage ditch, 10. backfill material, 11. pedestrian passage, 12. anti-scour ditch, 13. reinforced section of spillway. DETAILED DESCRIPTION

[0027] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively below, and preferred embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0029] Example:

[0030] See also Figure 1-Figure 6The present embodiment provides a karst water-rich tunnel partition drainage structure, comprising N tunnel main holes arranged in an array and an intermediate connecting channel 5 is provided between two adjacent tunnel main holes for communication, wherein N is an integer greater than or equal to 2, a drainage ditch (9) in one of the outermost tunnel main holes is connected to a drainage hole 1 through a connecting branch hole 2, the intermediate connecting channel 5 comprises a drainage channel 8 and a pedestrian passage 11, the drainage channel 8 is connected to the drainage ditches 9 in two adjacent tunnel main holes, and the pedestrian passage 11 is connected to the two adjacent tunnel main holes.

[0031] Preferably, the pedestrian passage is used for personnel to travel back and forth between the two tunnel main holes. The pedestrian passage connects the passage space of the tunnel main holes. The pedestrian passage is a conventional setting in this field, so it is not described in detail in this embodiment.

[0032] Specifically, in this embodiment, N is equal to 2, that is, it includes two main tunnels, namely the left main tunnel 3 and the right main tunnel 4, wherein the left main tunnel 3 is connected to the drainage tunnel 1 through the connecting branch tunnel 2, and the left main tunnel 3 and the right main tunnel 4 are connected through the intermediate connecting channel 5.

[0033] Furthermore, the elevation of the drainage tunnel 1 is lower than the elevation of the main tunnel of the tunnel, that is, the elevation of the drainage tunnel is lower than the elevation of all the main tunnels of the tunnels. The bottom surface of the connecting branch tunnel 2 and the bottom surface of the drainage channel 8 are both provided with a slope, so that the water flow in each tunnel main tunnel can be gathered into the drainage tunnel, and a good drainage effect can be ensured. When setting, it should be noted that if there are M sections of drainage channels 8, of which the first section of the drainage channel is closest to the connecting branch tunnel 2, the second section of the drainage channel is the second closest to the connecting branch tunnel, and the Mth section of the drainage channel 8 is the farthest from the connecting branch tunnel 2, it should be ensured that the bottom elevation of the connecting branch tunnel is lower than the bottom elevation of the first section of the drainage channel, and the bottom elevations of the first, second, ..., M sections of the drainage channels should be gradually increased to ensure that the water flow in the Mth section of the drainage channel can also smoothly enter the connecting branch tunnel 2 through other drainage channels, and then enter the drainage tunnel 1, so as to achieve good drainage. In this embodiment, the water flow in the right main tunnel of the tunnel enters the left main tunnel of the tunnel through the drainage channel and merges with the water flow in the left main tunnel of the tunnel, and then enters the drainage tunnel through the connecting branch tunnel.

[0034] Preferably, the bottom surface of the connecting branch hole 2 is stepped, and the water flows through each step in turn and then enters the drainage hole. The provision of steps can effectively reduce the flow rate of the water in the connecting branch hole and reduce the scouring flow rate of the drainage hole. At the same time, the steps can also facilitate maintenance personnel to walk and enter the drainage hole for maintenance.

[0035] Preferably, the location where the main tunnel is connected to the connecting branch tunnel 2 or the intermediate connecting passage 5 is the inverted arch deepening section 6, and the drainage ditch 9 at the inverted arch deepening section 6 is deepened. Figure 3 As shown; that is, the water flow at other positions in the tunnel can be better collected into the drainage ditch of the inverted arch deepening section to prevent the overflow of water flow. The deepening degree of the drainage ditch at the inverted arch deepening section in each tunnel main hole can be determined according to the actual drainage needs. Furthermore, an inverted arch deepening section 6 is provided on the tunnel main hole. According to the different positions of the tunnel main hole, the inverted arch deepening section 6 is used to connect the connecting branch hole and the drainage channel 8, or to connect the drainage channels 8 on both sides, or to connect the drainage channel 8 on one side.

[0036] Preferably, the drainage ditch 9 at the inverted arch deepening section 6 is connected to the connecting branch hole 2 or the drainage channel 8 using a concrete pipe 7.

[0037] See also Figure 2 , Figure 5 and Figure 6 The drainage hole 1 is provided with an anti-scouring ditch 12, and the water flow in the connecting branch hole 2 first enters the anti-scouring ditch 12 and then enters the drainage hole 1. Specifically, the anti-scouring ditch 12 is a section, and the connecting branch hole 2 is connected to the middle of the anti-scouring ditch 12. The water flow out of the connecting branch hole 2 flows from the middle of the anti-scouring ditch to both ends and enters the drainage hole, preventing the water flow out of the connecting branch hole from directly impacting the hole wall of the drainage hole, thereby playing a protective role.

[0038] See also Figure 5 The connecting branch hole 2 is connected to the drainage hole reinforcement section 13 of the drainage hole 1. The wall thickness of the drainage hole reinforcement section 13 is thickened to ensure the structural stability of the connection with the connecting branch hole and prevent collapse.

[0039] See also Figure 4 The drainage channel 8 and the pedestrian channel 11 are stacked, wherein the pedestrian channel 11 is located above the drainage channel 8, that is, the upper part is used for people to walk, and the lower part is used for drainage. This arrangement facilitates construction and reduces the complexity of construction.

[0040] Please also see Figure 3 The drainage ditch 9 is located at the invert of the tunnel and below the tunnel pavement. The invert of the tunnel is filled with backfill material 10 and a drainage ditch 9 is set, wherein the invert depth at the invert deepening section is greater than the invert depth of the normal invert section, thereby achieving that the drainage ditch at the invert deepening section is deeper than the drainage ditch at the normal section of the tunnel.

[0041] Preferably, the drainage tunnel is arranged parallel to the main tunnel of the tunnel, and the drainage tunnel adopts a composite lining, which is divided into two parts: initial support (primary lining) and secondary support (secondary lining).

[0042] Furthermore, for the forming method of the drainage hole, the connecting branch hole and the intermediate connecting channel, please refer to the prior art and will not be described in detail in this embodiment.

[0043] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A karst water-rich tunnel partition drainage structure, comprising N tunnel main holes arranged in an array and an intermediate connecting passage (5) is provided between two adjacent tunnel main holes for communication, wherein N is an integer greater than or equal to 2, and characterized in that: A drainage ditch (9) in one of the outermost tunnel main holes is connected to a drainage hole (1) via a connecting branch hole (2); the intermediate connecting passage (5) comprises a drainage passage (8) and a pedestrian passage (11); the drainage passage (8) is connected to the drainage ditches (9) in two adjacent tunnel main holes; and the pedestrian passage (11) is connected to two adjacent tunnel main holes.

2. The karst water-rich tunnel partition drainage structure according to claim 1 is characterized in that: The elevation of the drainage hole (1) is lower than the elevation of the main tunnel hole, and the bottom surface of the connecting branch hole (2) and the bottom surface of the drainage channel (8) are both provided with a slope.

3. The karst water-rich tunnel partition drainage structure according to claim 2 is characterized in that: The bottom surface of the connecting branch hole (2) is in a step shape.

4. The karst water-rich tunnel partition drainage structure according to claim 3 is characterized in that: The position where the main tunnel is connected to the connecting branch tunnel (2) or the intermediate connecting passage (5) is the inverted arch deepening section (6), and the drainage ditch (9) at the inverted arch deepening section (6) is deepened.

5. The karst water-rich tunnel partition drainage structure according to claim 4 is characterized in that: The drainage ditch (9) at the inverted arch deepening section (6) is connected to the connecting branch hole (2) or the drainage channel (8) through a concrete pipe (7).

6. The karst water-rich tunnel partition drainage structure according to claim 1 is characterized in that: An anti-scouring ditch (12) is provided in the drainage hole (1), and the water flow in the connecting branch hole (2) first enters the anti-scouring ditch (12) and then enters the drainage hole (1).

7. The karst water-rich tunnel partition drainage structure according to claim 6 is characterized in that: The connecting branch hole (2) is connected to the drainage hole reinforcement section (13) of the drainage hole (1), and the wall thickness of the drainage hole reinforcement section (13) is thickened.

8. The karst water-rich tunnel partition drainage structure according to any one of claims 1 to 7, characterized in that: The drainage channel (8) and the pedestrian channel (11) are arranged in a stacked manner, wherein the pedestrian channel (11) is located above the drainage channel (8).

9. The karst water-rich tunnel partition drainage structure according to any one of claims 1 to 7, characterized in that: The drainage ditch (9) is located at the invert of the tunnel and below the tunnel pavement.

10. The karst water-rich tunnel partition drainage structure according to any one of claims 1 to 7, characterized in that: The drainage hole is arranged parallel to the main tunnel.

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