Anti-blocking structure for central drainage ditch of existing tunnel

Abstract

The utility model provides an anti-blocking structure for a central drainage ditch of an existing tunnel, and relates to the technical field of tunnel construction, when the central drainage ditch is blocked, as a left curb drainage ditch and a right curb drainage ditch for construction are respectively positioned on two sides of a tunnel pavement, flow cutoff construction is not needed, and transformation can be carried out only by closing one lane at a time; after construction, water of a tunnel lining is introduced into the left curb drainage ditch and the right curb drainage ditch and does not flow into the central drainage ditch through the transverse drainage ditches any more, the central drainage ditch is discarded, and if the crystallization blockage phenomenon occurs in the later period, only the curb drainage ditches need to be opened to clean the two side drainage ditches, so that the construction efficiency is greatly improved. The central drainage ditch does not need to be opened by damaging the road surface, the tunnel maintenance risk and cost can be reduced, and the technical problems that in the prior art, when a traditional tunnel central drainage ditch is blocked, only road sealing and cutoff construction can be conducted, and the treatment effect is poor are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction, in particular to an anti-blocking structure for a central drainage ditch in an existing tunnel. Background Art

[0002] In previous projects, the central drainage ditch of the tunnel is often arranged in the middle of the tunnel. Once the central drainage ditch is blocked, the measure taken is to close the road and cut off the flow, dig the central inspection well of the tunnel and dredge the central drainage ditch. However, the treatment effect is often only a temporary solution for the poor drainage caused by crystallization blockage of the tunnel drainage system, and the drainage ditch may still be blocked after a period of time. In addition, the road closure and flow interruption construction has a great impact on society, especially on highways with large traffic volume. The economic losses and social impact caused by the flow interruption construction are huge. Utility Model Content

[0003] The utility model aims to provide an anti-blocking structure for the central drainage ditch of an existing tunnel, so as to alleviate the technical problem in the prior art that when the central drainage ditch of a traditional tunnel is blocked, the only way is to close the road and cut off the flow, and the treatment effect is not good.

[0004] The utility model provides an existing tunnel central drainage ditch anti-blocking structure, wherein the tunnel has a central drainage ditch and a road surface located above the central drainage ditch, and the central drainage ditch is connected to a transverse drainage ditch;

[0005] Also includes: left curb gutter, right curb gutter;

[0006] The road surface has a certain transverse slope so that one side of the road surface is higher than the other side;

[0007] The left curb drainage ditch is opened on the higher side of the road surface, and the right curb drainage ditch is opened on the lower side of the road surface. Both the left curb drainage ditch and the right curb drainage ditch are used to collect water from the tunnel lining and water on the road surface;

[0008] The left curb drainage ditch is disconnected from the transverse drainage ditch, and the right curb drainage ditch is disconnected from the transverse drainage ditch.

[0009] In an alternative embodiment,

[0010] The existing tunnel central drainage ditch anti-blocking structure also includes a left side transverse drainage pipe;

[0011] The left side transverse drainage pipe is arranged in the tunnel, and the left side transverse drainage pipe is communicated with the left side curb drainage ditch, and the left side transverse drainage pipe is communicated with the left side curb drainage ditch;

[0012] The left side transverse drain pipe is used to introduce water from the tunnel backing into the left side curb drain ditch.

[0013] In an alternative embodiment,

[0014] The existing tunnel central drainage ditch anti-blocking structure also includes a right side transverse drainage pipe;

[0015] The right side transverse drainage pipe is arranged in the tunnel, and the right side transverse drainage pipe is communicated with the right side curb drainage ditch, and the right side transverse drainage pipe is communicated with the right side curb drainage ditch;

[0016] The right side transverse drain pipe is used to introduce water from the tunnel backing into the right side curb drain ditch.

[0017] In an alternative embodiment,

[0018] A left drainage ditch diversion hole is provided at the bottom of the left curb drainage ditch, and the left drainage ditch diversion hole is configured to pass through the tunnel invert support structure and enter the surrounding rock, so that groundwater flows up to the left curb drainage ditch for drainage;

[0019] The water diversion hole of the left drainage ditch is filled with clean gravel.

[0020] In an alternative embodiment,

[0021] A right drainage ditch diversion hole is provided at the bottom of the right curb drainage ditch, and the right drainage ditch diversion hole is configured to pass through the tunnel invert support structure and enter the surrounding rock, so that groundwater flows up to the right curb drainage ditch for drainage;

[0022] The water diversion hole of the right drainage ditch is filled with clean gravel.

[0023] In an alternative embodiment,

[0024] Cover plates are provided on the tops of the left curb drainage ditch and the right curb drainage ditch.

[0025] In an alternative embodiment,

[0026] A plurality of cover plates are sequentially arranged along the length direction of the drainage ditch. A groove is arranged on one side of the cover plate close to the adjacent cover plate, and a water-permeable hole is formed between two adjacent grooves.

[0027] In an alternative embodiment,

[0028] The existing tunnel central drainage ditch anti-blocking structure also includes a water collection well;

[0029] The water collection well is opened on the higher side of the road surface, and the water collection well is communicated with the left curb drainage ditch.

[0030] In an alternative embodiment,

[0031] The bottom elevation of the water collection well is lower than the outlet elevation of the left lateral drainage pipe.

[0032] In an alternative embodiment,

[0033] The bottom elevation of the right curb drainage ditch is lower than the outlet elevation of the right transverse drainage pipe.

[0034] The utility model provides an anti-blocking structure for the central drainage ditch of an existing tunnel. When the central drainage ditch is blocked, since the left curb drainage ditch and the right curb drainage ditch under construction are respectively located on both sides of the tunnel pavement, there is no need for flow interruption construction, and only one lane needs to be closed at a time for transformation, which has little impact on the existing traffic. After the construction, the water of the tunnel lining is introduced into the left curb drainage ditch and the right curb drainage ditch, and no longer flows into the central drainage ditch through the transverse drainage ditch, and the central drainage ditch is abandoned. If crystallization blockage occurs again in the later period, it is only necessary to open the curb drainage ditch to clean the ditches on both sides, and there is no need to damage the pavement to open the central drainage ditch, which can reduce the risk and cost of tunnel maintenance, and alleviates the technical problem in the prior art that the traditional tunnel central drainage ditch can only be closed and flow interrupted when it is blocked, and the treatment effect is not good. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 A schematic diagram of the cross-sectional arrangement of an existing tunnel central drainage ditch anti-blocking structure provided by an embodiment of the utility model;

[0037] Figure 2 A schematic diagram of the drainage engineering layout of the anti-clogging structure of the central drainage ditch of an existing tunnel provided by the embodiment of the utility model;

[0038] Figure 3 A large-scale drawing of the left curb drainage ditch in the existing tunnel central drainage ditch anti-blocking structure provided by the embodiment of the utility model;

[0039] Figure 4 A large-scale drawing of the right curb drainage ditch in the existing tunnel central drainage ditch anti-blocking structure provided by the embodiment of the utility model;

[0040] Figure 5A large-scale drawing of a water collection well in an anti-clogging structure of a central drainage ditch in an existing tunnel provided by an embodiment of the utility model;

[0041] Figure 6 A schematic structural diagram of a cover plate in an existing tunnel central drainage ditch anti-blocking structure provided in an embodiment of the utility model.

[0042] Icons: 10-central drainage ditch; 20-pavement; 30-lateral drainage ditch; 40-blind pipe; 100-left curb drainage ditch; 110-left drainage ditch water inlet hole; 200-right curb drainage ditch; 210-right drainage ditch water inlet hole; 300-left lateral drainage pipe; 400-right lateral drainage pipe; 500-cover plate; 510-groove; 600-collection well. DETAILED DESCRIPTION

[0043] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0044] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0047] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the present embodiment provides an anti-blocking structure for the central drainage ditch of an existing tunnel. The existing tunnel is provided with a central drainage ditch 10 and a road surface 20 located above the central drainage ditch 10. The central drainage ditch 10 is connected to a transverse drainage ditch 30. The central drainage ditch 10 and the transverse drainage ditch 30 are both structures in the original tunnel. When the central drainage ditch 10 is blocked and needs repair and maintenance, the anti-blocking structure is constructed.

[0048] The anti-blocking structure further includes: a left curb drainage ditch 100 and a right curb drainage ditch 200; the road surface 20 has a certain transverse slope, and the inclination angle is 2°, so that one side of the road surface 20 is higher than the other side; the left curb drainage ditch 100 is opened on the higher side of the road surface 20, and the right curb drainage ditch 200 is opened on the lower side of the road surface 20. The left curb drainage ditch 100 and the right curb drainage ditch 200 are both used to collect water from the tunnel lining and water on the road surface 20, and the tunnel lining on the higher side of the road surface 20 is introduced into the left curb drainage ditch 100. The tunnel backing on the lower side of the road surface 20 is introduced into the right curb drainage ditch 200, and the left curb drainage ditch 100 is disconnected from the transverse drainage ditch 30, and the right curb drainage ditch 200 is disconnected from the transverse drainage ditch 30. The disconnected arrangement makes it possible for the water of the backing to be discharged out of the tunnel no longer through the central drainage ditch 10, but to be led out of the tunnel through the left curb drainage ditch 100 and the right curb drainage ditch 200. In this way, the tunnel can be renovated without interrupting the flow, and the problem of the inconvenience of repair and maintenance caused by the blockage of the central drainage ditch 10 is avoided.

[0049] In an optional embodiment, a left drainage ditch diversion hole 110 is provided at the bottom of the left curb drainage ditch 100. The left drainage ditch diversion hole 110 is configured to pass through the tunnel invert support structure and enter the surrounding rock to allow groundwater to flow up to the left curb drainage ditch 100 for drainage. The diameter of the left drainage ditch diversion hole 110 is 5 cm. The left drainage ditch diversion hole 110 must pass through the invert support structure and enter the surrounding rock by no less than 50 cm, and the left drainage ditch diversion hole 110 is filled with clean gravel to facilitate groundwater to flow up to the curb drainage ditch for drainage.

[0050] In an optional embodiment, a right drainage ditch diversion hole 210 is provided at the bottom of the right curb drainage ditch 200. The right drainage ditch diversion hole 210 is configured to pass through the tunnel invert support structure and enter the surrounding rock to allow groundwater to flow up to the right curb drainage ditch 200 for drainage. The diameter of the right drainage ditch diversion hole 210 is 5 cm. The right drainage ditch diversion hole 210 must pass through the invert support structure and enter the surrounding rock by no less than 50 cm, and the right drainage ditch diversion hole 210 is filled with clean gravel to facilitate groundwater to flow up to the curb drainage ditch for drainage.

[0051] In an optional embodiment, the existing tunnel central drainage ditch anti-blocking structure also includes a left side transverse drainage pipe 300; the left side transverse drainage pipe 300 is arranged in the tunnel, and the left side transverse drainage pipe 300 is connected with the left side curb drainage ditch 100, and the left side transverse drainage pipe 300 is connected with the left side curb drainage ditch 100; the left side transverse drainage pipe 300 introduces the water of the tunnel backing into the left side curb drainage ditch 100.

[0052] In an optional embodiment, the existing tunnel central drainage ditch anti-blocking structure also includes a right side transverse drainage pipe 400; the right side transverse drainage pipe 400 is arranged in the tunnel, and the right side transverse drainage pipe 400 is connected with the right side curb drainage ditch 200, and the right side transverse drainage pipe 400 is connected with the right side curb drainage ditch 200; the right side transverse drainage pipe 400 introduces the water of the tunnel backing into the right side curb drainage ditch 200.

[0053] In addition, blind pipes 40 are provided in the existing tunnel. The blind pipes 40 are located on both sides of the tunnel and are existing structures in the existing tunnel. The left blind pipe 40 is connected to the left transverse drainage pipe 300, and the right blind pipe 40 is connected to the right transverse drainage pipe 400.

[0054] like Figure 5 As shown, in an optional embodiment, in order to reduce excavation and reduce the amount of engineering work, the existing tunnel central drainage ditch anti-blocking structure also includes a water collection well 600; the water collection well 600 is opened on the higher side of the road surface 20, and the water collection well 600 is connected to the left curb drainage ditch 100. The water collection well 600 and the left side transverse drainage pipe 300 are arranged in the same position, and are evenly spaced along the length direction of the left curb drainage ditch 100. The left side transverse drainage pipe 300 first diverts water to the water collection well 600, and the water level of the water collection well 600 rises and then flows to the left curb drainage ditch 100. The water collection well 600 also has a certain siltation effect; the bottom elevation of the water collection well 600 is lower than the outlet elevation of the left side transverse drainage pipe 300; the bottom elevation of the right curb drainage ditch 200 is lower than the outlet elevation of the right side transverse drainage pipe 400.

[0055] The present embodiment provides an anti-blocking structure for the central drainage ditch of an existing tunnel. When the central drainage ditch 10 is blocked, since the left curb drainage ditch 100 and the right curb drainage ditch 200 under construction are respectively located on both sides of the tunnel pavement 20, there is no need for interruption of flow construction. Only one lane needs to be closed at a time for transformation, which has little impact on the existing traffic. After construction, the water of the tunnel backing is introduced into the left curb drainage ditch 100 and the right curb drainage ditch 200, and no longer flows into the central drainage ditch 10 through the transverse drainage ditch 30. The central drainage ditch 10 is discarded. If crystallization blockage occurs again in the later stage, it is only necessary to open the curb drainage ditch to clean the ditches on both sides. There is no need to damage the pavement 20 to open the central drainage ditch 10, which can reduce the risk and cost of tunnel maintenance and alleviate the technical problem in the prior art that the traditional tunnel central drainage ditch 10 can only be closed for interruption of flow construction when it is blocked, and the treatment effect is not good.

[0056] like Figure 6 As shown, in an optional embodiment, a cover plate 500 is provided on the top of the left curb gutter 100 and the right curb gutter 200. The cover plate 500 is prefabricated, which can improve the quality and construction efficiency of the cover plate 500. A plurality of cover plates 500 are sequentially provided along the length direction of the gutter. A groove 510 is provided on one side of the cover plate 500 close to the adjacent cover plate 500, and a water-permeable hole is formed between two adjacent grooves 510. The provision of the groove 510 makes it convenient for maintenance personnel to pick up the cover plate 500, and convenient for the later operation unit to open it for maintenance.

[0057] The utility model provides an anti-blocking structure for the central drainage ditch of an existing tunnel, which has the following beneficial effects:

[0058] 1. No need to interrupt traffic flow for construction. Only one lane needs to be closed at a time for reconstruction, which has little impact on existing traffic and is particularly suitable for highway tunnels with heavy traffic.

[0059] 2. If crystallization blockage occurs again in the later stage, it is only necessary to open the cover plate 500 of the curb drainage ditch to clean the ditches on both sides, without damaging the road surface 20 to open the central inspection well, which can reduce the risk and cost of tunnel maintenance.

[0060] 3. During routine inspections of the tunnel, the drainage ditches on both sides of the road can be checked to facilitate timely detection of ditch blockage, thereby avoiding water seepage on the tunnel pavement.

[0061] 4. The tunnel curb drainage ditch is a rectangular open ditch structure, which increases the water flow capacity and improves the drainage effect.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. An existing tunnel central drainage ditch anti-blocking structure, the tunnel having a central drainage ditch (10) and a road surface (20) located above the central drainage ditch (10), the central drainage ditch (10) being connected to a transverse drainage ditch (30); It is characterized in that Also includes: A left curb drainage ditch (100) and a right curb drainage ditch (200); The road surface (20) has a certain transverse slope, so that one side of the road surface (20) is higher than the other side; The left curb drainage ditch (100) is opened on the higher side of the road surface (20), and the right curb drainage ditch (200) is opened on the lower side of the road surface (20). Both the left curb drainage ditch (100) and the right curb drainage ditch (200) are used to collect water from the tunnel backing and water on the road surface (20); The left curb drainage ditch (100) is disconnected from the transverse drainage ditch (30), and the right curb drainage ditch (200) is disconnected from the transverse drainage ditch (30).

2. The anti-blocking structure of the central drainage ditch of an existing tunnel according to claim 1 is characterized in that: The existing tunnel central drainage ditch anti-blocking structure further includes a left side transverse drainage pipe (300); The left side transverse drainage pipe (300) is arranged in the tunnel, and the left side transverse drainage pipe (300) is in communication with the left side curb drainage ditch (100); the left side transverse drainage pipe (300) is in communication with the left side curb drainage ditch (100); The left side transverse drainage pipe (300) is used to introduce water from the tunnel backing into the left side curb drainage ditch (100).

3. The anti-blocking structure of the central drainage ditch of an existing tunnel according to claim 1 is characterized in that: The existing tunnel central drainage ditch anti-blocking structure further includes a right side transverse drainage pipe (400); The right side transverse drainage pipe (400) is arranged in the tunnel, and the right side transverse drainage pipe (400) is in communication with the right side curb drainage ditch (200); the right side transverse drainage pipe (400) is in communication with the right side curb drainage ditch (200); The right side transverse drainage pipe (400) is used to introduce water from the tunnel backing into the right side curb drainage ditch (200).

4. The anti-blocking structure of the central drainage ditch of an existing tunnel according to claim 2 is characterized in that: A left drainage ditch water diversion hole (110) is provided at the bottom of the left curb drainage ditch (100), and the left drainage ditch water diversion hole (110) is configured to pass through the tunnel invert support structure and enter the surrounding rock, so that groundwater flows up to the left curb drainage ditch (100) for drainage; The left drainage ditch water diversion hole (110) is filled with clean gravel.

5. The anti-blocking structure of the central drainage ditch of an existing tunnel according to claim 3 is characterized in that: A right drainage ditch water diversion hole (210) is provided at the bottom of the right curb drainage ditch (200), and the right drainage ditch water diversion hole (210) is configured to pass through the tunnel invert support structure and enter the surrounding rock, so that groundwater flows up to the right curb drainage ditch (200) for drainage; The right drainage ditch water diversion hole (210) is filled with clean gravel.

6. The anti-blocking structure of the central drainage ditch of an existing tunnel according to claim 1 is characterized in that: Cover plates (500) are provided on the tops of the left curb drainage ditch (100) and the right curb drainage ditch (200).

7. The anti-blocking structure of the central drainage ditch of an existing tunnel according to claim 6 is characterized in that: A plurality of cover plates (500) are sequentially arranged along the length direction of the drainage ditch, and a groove (510) is arranged on one side of the cover plate (500) close to an adjacent cover plate (500), and a water-permeable hole is formed between two adjacent grooves (510).

8. The anti-blocking structure of the central drainage ditch of an existing tunnel according to claim 2 is characterized in that: The existing tunnel central drainage ditch anti-blocking structure also includes a water collection well (600); The water collection well (600) is opened on the higher side of the road surface (20), and the water collection well (600) is connected to the left curb drainage ditch (100).

9. The anti-blocking structure of the central drainage ditch of an existing tunnel according to claim 8, characterized in that: The bottom elevation of the water collection well (600) is lower than the outlet elevation of the left lateral drainage pipe (300).

10. The anti-blocking structure of the central drainage ditch of an existing tunnel according to claim 3, characterized in that: The bottom elevation of the right curb drainage ditch (200) is lower than the outlet elevation of the right transverse drainage pipe (400).

Images