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Tunnel waterproof layer, model board trolley and construction method

A technology of formwork trolley and construction method, which is applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve the problems of reducing the bearing capacity of secondary lining structures, low construction efficiency, and reducing waterproof performance, and achieves the improvement of secondary lining pouring Quality, reduce construction costs, improve the effect of waterproof performance

Pending Publication Date: 2020-06-26
中铁二院成都勘察设计研究院有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is: for the existing waterproof board and its construction method in the prior art, the initial support sprayed concrete flatness requirement is high. The concrete is uneven, and there are a large number of anchor rod ends, so that the waterproof board cannot be closely attached to the sprayed concrete surface. When the lining concrete is poured later, the side pressure of the concrete will easily crack the waterproof board into holes, forming water leakage channels, and greatly reducing the waterproof performance. ; It is easy to form cavities behind the lining, seriously reducing the bearing capacity of the secondary lining structure, providing a tunnel waterproof layer, formwork trolley and construction method

Method used

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  • Tunnel waterproof layer, model board trolley and construction method
  • Tunnel waterproof layer, model board trolley and construction method
  • Tunnel waterproof layer, model board trolley and construction method

Examples

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Effect test

Embodiment 1

[0087] Such as Figure 3-4 As shown, a tunnel waterproof layer 1 according to the present invention includes a waterproof board 11 and a polyethylene foam board 12 .

[0088] The side of the EVA waterproof board 11 is bonded to the side of the foam board 12 with high porosity, the thickness of the EVA waterproof board 11 is 0.8 mm to 1.5 mm, the thickness of the foam board 12 is 2 mm to 4 mm, and the waterproof layer 1 The width is greater than or equal to 6m, and the preferred width in this embodiment is 6m to 9m; when installed, the EVA waterproof board 11 is used to face the inner side of the tunnel, and the foam board 12 is used to face the side of the surrounding rock.

[0089] Using the tunnel waterproof layer 1 described in the present invention can greatly improve the waterproof performance of the tunnel structure, greatly improve the quality of the secondary lining pouring, greatly improve the construction efficiency, and reduce the construction cost;

[0090] Greatl...

Embodiment 2

[0095] Such as Figure 3-16 As shown, a formwork trolley for a tunnel waterproof layer 1 according to the present invention includes a vehicle body 2, driving components and an arched formwork capable of adapting to the contour of the tunnel.

[0096] The arch formwork includes a vault formwork 3 , a side wall formwork 4 and a footboard formwork 5 ;

[0097] The top of the car body 2 is provided with the first telescopic part 31, and the top end of the first telescopic part 31 is hinged on the inner side of the vault formwork 3, and the two sides of the vault formwork 3 are respectively hinged on the side wall formwork 4. side, the lower side of the side wall template 4 is hinged to the footer template 5, and the side of the car body 2 is hinged to the second telescopic part 41, the third telescopic part 42 and the fourth telescopic part 51, so The other end of the second telescopic part 41 is hinged on the inside of the side wall template 4, the third telescopic part 42 is l...

Embodiment 3

[0106] Such as Figure 3-16 As shown, the construction method of a tunnel waterproof layer 1 according to the present invention uses the formwork trolley of the tunnel waterproof layer 1 as described in Embodiment 2, and the construction method comprises the following steps:

[0107] ① if Figure 6 As shown, the tunnel excavation and initial support shotcrete are completed and the design strength is reached. It should be noted that the thickness of the shotcrete can reach the design thickness, and it is not necessary to spray to the outer contour of the lining.

[0108] ② Start the driving part connected to the arch formwork, so that the arch formwork shrinks radially along the tunnel, so as to increase the working space between the arch formwork and shotcrete;

[0109] Specifically, such as Figure 7 As shown, the contraction of the first telescopic part 31 drives the vault formwork 3 to descend, and both the second telescopic part 41 and the third telescopic part 42 contra...

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Abstract

The invention discloses a tunnel waterproof layer, a model board trolley and a construction method. The waterproof layer comprises EVA waterproof boards and foam boards. The side surfaces of the foamboards are bonded to the side surfaces of the EVA waterproof boards, the EVA waterproof boards are used for facing the inner side of a tunnel, and the foam boards are used for facing the surrounding rock side. By applying the tunnel waterproof layer, the model board trolley and the construction method provided by the invention, the waterproof performance of a tunnel structure can be greatly improved, the secondary lining casting quality and the construction efficiency are greatly improved, and the construction cost is lowered.

Description

technical field [0001] The invention relates to the field of tunnel waterproofing, in particular to a tunnel waterproof layer, a template trolley and a construction method. Background technique [0002] The tunnel structure is located underground and is inevitably affected by groundwater. When building tunnels and underground projects, the groundwater problem has long been a key issue that plagues design and construction. In recent years, with the development of transportation, a large number of mountain tunnels and urban underground tunnels have been built in my country. However, due to waterproof materials, construction methods, construction techniques, etc., a large amount of water leakage has occurred in the tunnel structure after operation, which has seriously affected The structural durability and operational safety of the tunnel are improved. [0003] Such as figure 1 As shown, the waterproof method adopted by almost most of the railway and highway tunnels at home an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/38E21D11/40E21D11/10
CPCE21D11/10E21D11/38E21D11/381E21D11/40
Inventor 刘科郦亚军甘目飞陈国栋尚寒春刘雄伟王微嘉
Owner 中铁二院成都勘察设计研究院有限责任公司
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