Air bag device suitable for blocking shield tunnel segment hand hole

Abstract

The utility model discloses an air bag device suitable for blocking a shield tunnel segment hand hole, which belongs to the technical field of tunnel engineering, and comprises a connecting part which surrounds the outer side of a connecting bolt nut and is detachably connected with a connecting bolt steel gasket; the air bag surrounds the outer side of the connecting part and is connected with the connecting part in a sealed mode. The plugging device is light in weight and convenient to install, safety and reliability in the plugging process are remarkably improved, and meanwhile the problems of falling risk and space occupation existing in a traditional cement mortar plugging mode are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of tunnel engineering, and concretely relates to a gasbag device suitable for shield tunnel segment hand hole plugging. BACKGROUND

[0002] In shield tunnel construction, the connecting hand hole of the segment needs to be plugged to prevent the external environment from corroding the connecting bolt, thereby improving the overall safety of the shield tunnel structure. At present, the common hand hole plugging method mainly adopts the form of cement mortar daubing. However, this method has obvious defects: the cement mortar may fall off in the long-term use process, and once it falls off, the plugging effect will decrease significantly and may cause safety accidents, threatening the safety of the tunnel in use.

[0003] To solve the above problems, the utility model patent CN02112935A discloses a shield tunnel segment hand hole bolt structure and a corrosion-proof plugging device. The device increases a protective cover structure on the basis of traditional cement mortar daubing to reduce the risk of cement mortar falling off. However, since the protective cover adopts a screw fixing mode, when the screw fails due to corrosion, the stability of the cement mortar cannot be guaranteed, which may still cause safety hazards in the long-term use environment.

[0004] In addition, the invention patent CN113073996A proposes a hand hole plugging device for segment bolts and a construction method thereof. The device is based on the principle of mechanics and fixes the plugging device on the connecting bolt of the segment, realizing the reliability of plugging. However, the design of the positioning rod of the device will occupy the clearance of the segment, which may have a certain impact on the use space of the tunnel, especially in the case where the tunnel space needs to be fully utilized, this design will bring inconvenience in use.

[0005] Therefore, although the current hand hole plugging technology solves the problem of cement mortar falling off to some extent, it still has limitations such as failure of the fixing mode of the protective device or impact of the structural design on the use space of the tunnel. Therefore, there is an urgent need for a new type of hand hole plugging device that can balance plugging reliability, simplify installation process and reduce impact on tunnel space to meet the actual needs of shield tunnel construction and operation. Utility model content

[0006] To achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A gasbag device suitable for shield tunnel segment hand hole plugging, comprising:

[0008] A connecting component surrounds the outside of the connecting bolt nut and is detachably connected with the connecting bolt steel washer;

[0009] An air bag is arranged outside the connecting component and is in sealed connection with the connecting component.

[0010] Further, the air bag is arranged in cooperation with a segment hand hole and is used for plugging the segment hand hole.

[0011] Further, the connecting component is a magnet.

[0012] Further, an air inlet valve is arranged on the air bag.

[0013] Further, the air bag is filled with inert gas.

[0014] Further, a sealing glue is applied to a contact position of the air bag and a segment hand hole wall.

[0015] Further, the air bag is circular or elliptical.

[0016] The air bag device for plugging a segment hand hole of a shield tunnel has the advantages that:

[0017] The air bag device for plugging a segment hand hole of a shield tunnel has the advantages that: BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 It is a schematic diagram of the whole structure of the utility model;

[0019] Fig. 2 It is a schematic diagram of the air bag of the utility model.

[0020] In the drawing: 1, segment; 2, air bag; 3, connecting bolt nut; 4, connecting bolt steel gasket; 5, connecting component; 6, segment hand hole wall; 7, air inlet valve. DETAILED DESCRIPTION

[0021] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0022] Embodiment 1

[0023] Reference Figs. 1-2 An air bag device for plugging a segment hand hole of a shield tunnel comprises:

[0024] The connecting component 5 is arranged outside the connecting bolt nut and is in detachable connection with the connecting bolt steel gasket 4.

[0025] The air bag 2 is arranged outside the connecting part 5 and is in sealed connection with the connecting part 5.

[0026] The air bag device can realize efficient and reliable sealing of the segment hand hole, and provides a safe and convenient solution for shield tunnel construction and operation.

[0027] In specific implementation, in order to further improve the sealing performance, the air bag and the connecting part are bonded by the sealing glue with good air tightness to form a whole.

[0028] In specific implementation, a gap is left between the connecting part and the connecting bolt nut.

[0029] In specific implementation, when the segment hand hole needs to be sealed, the air bag 2 can be inserted into the segment hand hole to completely cover the hand hole area, and a layer of sealing glue with good air tightness can be applied to the part where the air bag 2 contacts the segment hand hole wall 6, so as to enhance the sealing effect and prevent external substances from entering.

[0030] In this embodiment, the air bag 2 is made of flexible material and has good air tightness.

[0031] In this embodiment, the air bag 2 has a recessed part at the middle part, and the recessed part is arranged in cooperation with the connecting part 5.

[0032] In specific implementation, the depth of the recessed part of the air bag 2 is the sum of the height of the connecting part 5 and the thickness of the connecting bolt steel gasket 4, so that the air bag can seal the connecting part and the connecting bolt steel gasket.

[0033] In this embodiment, the air bag 2 is arranged in cooperation with the segment hand hole on the segment 1 and is used for sealing the segment hand hole.

[0034] In this embodiment, the connecting part 5 is a magnet and is fixed on the steel gasket of the segment connecting bolt through magnetic attraction to ensure the stability of the device.

[0035] In this embodiment, the air bag 2 is provided with an air inlet valve 7.

[0036] In this embodiment, the air bag 2 is filled with inert gas.

[0037] In specific implementation, the inert gas (such as nitrogen) is filled into the air bag through the air inlet valve 7, so that the air bag 2 is inflated and completely adheres to the inner wall of the hand hole, thereby providing efficient sealing performance.

[0038] In this embodiment, the filled inert gas not only improves the sealing effect of the device, but also plays a certain anticorrosion protection role for the segment connecting bolt 3.

[0039] In the embodiment, the contact part of the air bag 2 and the pipe piece hand hole wall 6 is smeared with sealant.

[0040] The air bag device has the characteristics of light weight, and the overall weight is far less than that of the cement mortar plugging scheme used in the conventional plugging method.

[0041] Method for use: when the pipe piece hand hole needs to be plugged, first, the air bag 2 is inserted into the pipe piece hand hole and fixed on the connecting bolt steel gasket 4 through the connecting part magnet; then, inert gas is filled into the air bag 2 through the air inlet valve 7 until the air bag 2 is inflated and closely combined with the pipe piece hand hole wall 6; finally, if necessary, sealant can be smeared on the contact part of the air bag 2 and the pipe piece hand hole wall 6 to further enhance the sealing performance and anti-falling performance.

[0042] In the embodiment, the air bag 2 is circular or elliptical to adapt to pipe piece hand holes of different shapes.

[0043] The above is only the preferred embodiment of the utility model, and is not used for limiting the utility model, and the utility model can have various changes and changes for the person skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model is included in the protection scope of the utility model.

Claims

1. An airbag device suitable for shield tunnel segment handhole plugging, characterized in that, The utility model relates to a connecting device for connecting the connecting bolt and the connecting bolt nut, and the connecting device comprises: A connecting part which surrounds the outer side of the connecting bolt nut and is detachably connected with the connecting bolt steel gasket; An air bag which surrounds the outer side of the connecting part and is sealingly connected with the connecting part.

2. The airbag device for plugging the hand hole of a shield tunnel segment according to claim 1, wherein The air bag is arranged in cooperation with the pipe piece hand hole and is used for plugging the pipe piece hand hole.

3. The airbag device for plugging the hand hole of a shield tunnel segment according to claim 1, wherein The connecting part is a magnet.

4. The airbag device for plugging the hand hole of a shield tunnel segment according to claim 1, wherein An air inlet valve is arranged on the air bag.

5. The airbag device for plugging the hand hole of a shield tunnel segment according to claim 1, wherein The air bag is filled with inert gas.

6. The airbag device for plugging the hand hole of a shield tunnel segment according to claim 1, wherein The contact position of the air bag and the pipe piece hand hole wall is smeared with sealant.

7. The airbag device for plugging the hand hole of a shield tunnel segment according to claim 1, wherein The air bag is circular or elliptical.

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