Plugging structure of inclined shaft

Abstract

The utility model discloses a blocking structure of an inclined shaft, which comprises a blocking wall 3-1 positioned at the intersection of the inclined shaft 2 and a main tunnel 1, and further comprises a transverse intercepting ditch 4-1 positioned at the bottom of the inclined shaft 2 and used for collecting accumulated water of the inclined shaft 2; the longitudinal drainage culvert 4-2 is connected with the transverse intercepting ditch 4-1; one end of the drainage pipe 4-3 is connected with the longitudinal drainage culvert 4-2, and the other end of the drainage pipe 4-3 is connected with a central ditch 4-4 of the main hole tunnel 1, so that the inclined shaft is effectively blocked, accumulated water in the inclined shaft is introduced into a drainage system of the main hole of the tunnel through the transverse drainage ditches, the longitudinal drainage culvert and the drainage pipe of the inclined shaft, and the problem of accumulated water in the inclined shaft is effectively solved; and tunnel operation safety is improved.

Description

Technical Field

[0001] The utility model relates to the field of tunnel engineering, in particular to a blocking structure of an inclined shaft. Background Art

[0002] In tunnel engineering, inclined shafts are a special structure whose main function is to ensure the construction period of the main tunnel, because the construction working surface of the main tunnel can be increased by setting up inclined shafts. However, most inclined shafts are only used as auxiliary construction channels during the construction period, and generally lose their function and are abandoned during the operation period. If the inclined shafts are not blocked or treated, they will become channels for underground debris flows, underground rivers, etc. during the operation period, increasing the risk of operating tunnels.

[0003] Since various complex geological conditions may be encountered during tunnel construction, such as faults, fissures, soft soil layers, etc., these geological conditions may cause seepage, gushing and other problems in the inclined shaft. If the blocking measures in the inclined shaft are not in place, it will cause serious water accumulation in the inclined shaft, affecting the safety and use of the tunnel. In addition, the existing blocking methods often require a lot of manpower and material resources, the construction is difficult, the effect is not ideal, and the maintenance cost is high. In addition, the existing drainage methods often have certain limitations, such as unreasonable design of the drainage system, insufficient drainage capacity, and poor drainage. The existing blocking and drainage methods in the inclined shaft have certain limitations in solving the problem of water accumulation in the inclined shaft, and have failed to effectively avoid the risks of tunnel operation.

[0004] Therefore, it is necessary to study a new inclined shaft plugging structure that can effectively solve the problem of water accumulation in the inclined shaft, improve tunnel operation safety, and reduce operating costs. Utility Model Content

[0005] The utility model aims to provide a plugging structure for an inclined shaft, which can solve the above technical problems.

[0006] According to one aspect of the utility model, a blocking structure for an inclined shaft is provided, comprising a blocking wall 3-1 located at the intersection of the inclined shaft 2 and the main tunnel 1, and also comprising: a transverse intercepting ditch 4-1 located at the bottom of the inclined shaft 2 and used to collect accumulated water in the inclined shaft 2; a longitudinal drainage culvert 4-2 connected to the transverse intercepting ditch 4-1; a drainage pipe 4-3, one end of which is connected to the longitudinal drainage culvert 4-2 and the other end is connected to the central ditch 4-4 of the main tunnel 1.

[0007] Preferably, the transverse intercepting ditch 4-1 adopts a reinforced concrete structure with a rectangular cross-section, and the width and height of the transverse intercepting ditch 4-1 are 60 cm and 150 cm respectively.

[0008] Preferably, the blocking structure of the inclined shaft also includes a drainage ditch cover plate with multiple slots, which is located at the top of the transverse drainage ditch 4-1.

[0009] Preferably, the longitudinal drainage culvert 4-2 comprises: a drainage culvert structure 4-2-1, which is a reinforced concrete structure with a rectangular cross-section, and the width of the drainage culvert structure 4-2-1 is the same as the width of the transverse intercepting ditch 4-1; backfill gravel 4-2-2, which is located inside the drainage culvert structure 4-2-1.

[0010] Preferably, the height of the drainage culvert structure 4-2-1 is in the range of 130-150 cm.

[0011] Preferably, the backfill gravel 4-2-2 is made of 0.5-3.2 cm graded gravel, and the outer side is wrapped with non-woven fabric.

[0012] Preferably, the blocking structure of the inclined shaft further includes a steel mesh 4-2-3, which is located at the connection between the transverse intercepting ditch 4-1 and the longitudinal drainage culvert 4-2.

[0013] Preferably, the drainage pipe 4-3 is a steel pipe with a diameter of 40 cm and a buried slope of 0.3%.

[0014] Preferably, the outer side of the drain pipe 4 - 3 is wrapped with a polyvinyl chloride film, and the inner wall of the drain pipe is coated with a corrosion-resistant coating.

[0015] Preferably, the blocking structure of the inclined shaft also includes: a reserved door opening 3-3, located on the blocking wall 3-1; a reserved door opening door frame 3-2, located on the outside of the reserved door opening 3-3 and adopting a reinforced concrete structure; a fire door 3-4, installed on the side of the reserved door opening door frame 3-2 close to the main tunnel 1.

[0016] The utility model provides a plugging structure for an inclined shaft, comprising a plugging wall 3-1 located at the intersection of the inclined shaft 2 and the main tunnel 1, and also comprising: a transverse intercepting ditch 4-1 located at the bottom of the inclined shaft 2 and used for collecting the accumulated water in the inclined shaft 2; a longitudinal drainage culvert 4-2 connected to the transverse intercepting ditch 4-1; a drainage pipe 4-3, one end of which is connected to the longitudinal drainage culvert 4-2, and the other end is connected to the central ditch 4-4 of the main tunnel 1, so that while the inclined shaft is effectively plugged, the accumulated water in the inclined shaft is introduced into the drainage system of the tunnel main hole through the transverse drainage ditch, the longitudinal drainage culvert and the drainage pipe of the inclined shaft, thereby effectively solving the problem of water accumulation in the inclined shaft and improving the safety of tunnel operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary 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:

[0018] Figure 1It is a plan view of a plugging structure of an inclined shaft according to an embodiment of the utility model;

[0019] Figure 2 It is a vertical layout diagram of a plugging structure of an inclined shaft according to an embodiment of the utility model;

[0020] Figure 3 yes Figure 1 Sectional layout of Ⅰ-Ⅰ;

[0021] Figure 4 yes Figure 1 Ⅱ-Ⅱ section layout drawing;

[0022] Among them: 1. Main tunnel; 1-1. Main tunnel structure; 2. Inclined shaft; 2-1. Inclined shaft structure; 3-1. Blocking wall; 3-2. Reserved door opening and door frame; 3-3. Reserved door opening; 3-4. Fire door; 4-1. Horizontal intercepting ditch; 4-2. Longitudinal drainage culvert; 4-2-1. Drainage culvert structure; 4-2-2. Backfill gravel; 4-2-3. Steel mesh; 4-3. Drainage pipe; 4-4. Central ditch; 4-5. Central ditch inspection well. DETAILED DESCRIPTION

[0023] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0024] Reference will now be made in detail to various embodiments of the present invention, examples of which are shown in the accompanying drawings and described below. For ease of interpretation and precise definition in the appended claims, the terms "upper", "lower", "inner" and "outer" are used to describe features of the exemplary embodiments shown in the drawings with reference to their positions.

[0025] Figure 1-Figure 2 The plan view and elevation view of a plugging structure for an inclined shaft according to an embodiment of the utility model are respectively shown. Figure 3-Figure 4 They are shown respectively Figure 1 Sectional layout of Ⅰ-Ⅰ and Ⅱ-Ⅱ. Figure 1-Figure 4 As shown, the blocking structure of the inclined shaft includes a blocking wall 3-1 located at the intersection of the inclined shaft 2 and the main tunnel 1, and also includes: a transverse intercepting ditch 4-1, located at the bottom of the inclined shaft 2, for collecting the accumulated water in the inclined shaft 2; a longitudinal drainage culvert 4-2, connected to the transverse intercepting ditch 4-1; a drainage pipe 4-3, one end of which is connected to the longitudinal drainage culvert 4-2, and the other end is connected to the central ditch 4-4 of the main tunnel 1.

[0026] In the related art, when the inclined shaft is blocked, the problem of water accumulation in the inclined shaft is easily ignored, resulting in water overflow in the inclined shaft, affecting the operational safety of the main tunnel. The embodiment of the utility model, based on the premise of building a blocking wall by relying on the main tunnel structure 1-1 and the inclined shaft structure 2-1, at the same time, in order to ensure smooth drainage, a drainage system is set up to connect the groundwater that may be collected in the inclined shaft to the central ditch 4-4 through the horizontal intercepting ditch 4-1, the longitudinal drainage culvert 4-2 and the drainage pipe 4-3.

[0027] According to an embodiment of the utility model, the plugging structure of the inclined shaft also includes a drainage ditch cover plate with multiple notches, which is located at the top of the transverse drainage ditch 4-1.

[0028] Inclined wells not only have the problem of groundwater collection, but also easily become channels for rocks to roll down and mudslides to impact. When disasters such as the above occur, the intercepting ditch is easily blocked, causing the drainage system to fail. Installing an intercepting ditch cover with multiple notches on the top of the horizontal intercepting ditch can form the first line of defense to block larger rocks and ensure the continuous operation of the intercepting ditch.

[0029] According to the embodiment of the utility model, the transverse intercepting ditch 4-1 adopts a reinforced concrete structure with a rectangular cross-section, and the width and height of the transverse intercepting ditch 4-1 are 60 cm and 150 cm respectively.

[0030] According to the embodiment of the utility model, the longitudinal drainage culvert 4-2 includes: a drainage culvert structure 4-2-1, which adopts a reinforced concrete structure with a rectangular cross-section, and the width of the drainage culvert structure 4-2-1 is the same as the width of the transverse intercepting ditch 4-1; backfill gravel 4-2-2, which is located inside the drainage culvert structure 4-2-1.

[0031] According to the embodiment of the utility model, the height range of the drainage culvert structure 4-2-1 is 130-150 cm.

[0032] According to the embodiment of the utility model, the backfill gravel 4-2-2 is made of 0.5-3.2 cm graded gravel, and the outer side is wrapped with non-woven fabric.

[0033] According to an embodiment of the utility model, the blocking structure of the inclined shaft further includes a steel mesh 4-2-3, which is located at the connection between the transverse intercepting ditch 4-1 and the longitudinal drainage culvert 4-2.

[0034] In the related art, a sedimentation tank is used to filter the water in the inclined well, but there are technical problems such as large floor space, low filtering efficiency, and easy sludge accumulation. The longitudinal drainage culvert 4-2 of the embodiment of the utility model is backfilled with gravel 4-2-2, and the gravel gradation is 0.5-3.2cm. At the same time, a non-woven fabric is wrapped outside to filter the mud and sand in the water. A steel mesh 4-2-3 is also arranged at the connection between the transverse intercepting ditch 4-1 and the longitudinal drainage culvert 4-2 to pre-block slightly larger stone impurities, and finally form a filtering system for the water in the inclined well composed of the intercepting ditch cover, the steel mesh, and the backfilled gravel.

[0035] According to the embodiment of the utility model, the drainage pipe 4-3 is a steel pipe with a diameter of 40 cm and a buried slope of 0.3%.

[0036] According to the embodiment of the utility model, the outer side of the drain pipe 4 - 3 is wrapped with a polyvinyl chloride film, and the inner wall of the drain pipe is coated with a corrosion-resistant coating.

[0037] The drainage pipe is buried under the inclined shaft to drain the water accumulated in the inclined shaft through the longitudinal drainage culvert into the central ditch 4-4. Since the inner side of the drainage pipe needs to transport the accumulated water and the outer side is in contact with the stratum for a long time, there are certain requirements for the anti-corrosion performance of the drainage pipe 4-3. Therefore, the outer side and the inner side of the drainage pipe 4-3 are respectively subjected to corresponding anti-corrosion treatment. In addition, a central ditch inspection well 4-5 is set at the junction of the drainage pipe 4-3 and the central ditch 4-4 to facilitate the inspection of the tunnel's drainage facilities.

[0038] According to the embodiment of the utility model, the blocking structure of the inclined shaft also includes: a reserved door opening 3-3, located on the blocking wall 3-1; a reserved door opening door frame 3-2, located on the outside of the reserved door opening 3-3, and adopts a reinforced concrete structure; a fire door 3-4, installed on the side of the reserved door opening door frame 3-2 close to the main tunnel 1.

[0039] The blocking wall 3-1 of the inclined shaft is made of durable materials such as rubble concrete or plain concrete, with an effective thickness of 3m. In addition, in order to facilitate maintenance personnel to inspect the central ditch inspection well 4-5, a reserved door opening 3-3 for passage is set on the blocking wall 3-1. In order to meet the fire protection requirements, GFM-0921 fire doors should also be installed. The specific meaning of this model is a steel insulated fire door with an overall size of 900×2100mm.

[0040] The utility model has the following effects:

[0041] It effectively solves the problem of water accumulation in the inclined shaft, can improve the safety of tunnel operation, reduce operation and maintenance costs, provide guarantee for the smooth use of the tunnel, and has broad application prospects.

[0042] The above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other changes or modifications in different forms may be made based on the following description, and these changes, modifications, substitutions and deformations derived from the principles and spirit of the present invention still fall within the scope of protection of the present invention.

Claims

1. A plugging structure for an inclined shaft, comprising a plugging wall (3-1) located at the intersection of the inclined shaft (2) and the main tunnel (1), characterized in that: Also includes: A transverse intercepting ditch (4-1), located at the bottom of the inclined well (2), for collecting the accumulated water in the inclined well (2); A longitudinal drainage culvert (4-2) connected to the transverse intercepting ditch (4-1); A drainage pipe (4-3) has one end connected to the longitudinal drainage culvert (4-2) and the other end connected to the central ditch (4-4) of the main tunnel (1).

2. The plugging structure of an inclined shaft according to claim 1, characterized in that: The transverse intercepting ditch (4-1) adopts a reinforced concrete structure with a rectangular cross-section, and the width and height of the transverse intercepting ditch (4-1) are 60 cm and 150 cm respectively.

3. The plugging structure of an inclined shaft according to claim 2, characterized in that: It also comprises a drainage ditch cover plate with a plurality of notches, which is located on the top of the transverse drainage ditch (4-1).

4. The plugging structure of an inclined shaft according to claim 2, characterized in that: The longitudinal drainage culvert (4-2) comprises: The drainage culvert structure (4-2-1) is a reinforced concrete structure with a rectangular cross-section, and the width of the drainage culvert structure (4-2-1) is the same as the width of the transverse intercepting ditch (4-1); Backfill gravel (4-2-2) is located inside the drainage culvert structure (4-2-1).

5. The plugging structure of an inclined shaft according to claim 4, characterized in that: The height of the drainage culvert structure (4-2-1) ranges from 130 to 150 cm.

6. The plugging structure of an inclined shaft according to claim 4, characterized in that: The backfill gravel (4-2-2) is 0.5-3.2 cm graded gravel, and the outer side is wrapped with non-woven fabric.

7. The plugging structure of an inclined shaft according to claim 1, characterized in that: It also includes a steel mesh (4-2-3) located at the connection between the transverse intercepting ditch (4-1) and the longitudinal drainage culvert (4-2).

8. The plugging structure of an inclined shaft according to claim 1, characterized in that: The drainage pipe (4-3) is a steel pipe with a diameter of 40 cm and a buried slope of 0.3%.

9. The plugging structure of an inclined shaft according to claim 8, characterized in that: The outer side of the drainage pipe (4-3) is wrapped with a polyvinyl chloride film, and the inner wall of the drainage pipe is coated with a corrosion-resistant coating.

10. The plugging structure of an inclined shaft according to claim 1, characterized in that: Also includes: A reserved door opening (3-3) is located on the blocking wall (3-1); A reserved door opening door frame (3-2), located outside the reserved door opening (3-3), adopts a reinforced concrete structure; A fireproof door (3-4) is installed on a side of the reserved door opening frame (3-2) close to the main tunnel (1).

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