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Pi-shaped plate and inverted arch combined tunnel bottom lining structure

A combined, tunnel-bottom technology, used in tunnel linings, wellbore linings, tunnels, etc., can solve problems such as the inability to effectively drain water, the uplift and cracking of inverted arches, and the increase in concrete filling.

Inactive Publication Date: 2016-08-10
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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Problems solved by technology

The biggest defect of the traditional drainage system is that the central ditch is set inside the tunnel structure, mainly to drain and drain the surrounding groundwater in the area of ​​the main arch wall, and the accumulated water below the inverted arch of the tunnel cannot be effectively drained
[0005] In addition, some disasters such as invert uplift and cracking occurred in the construction and operation of some high-in-situ stress tunnels in Liuzhan, Yungui, Chenglan and other railways. In order to solve this problem, circular or nearly circular lining structures are often used in the design ( like Figure 5 ), on the one hand, the construction of the inverted arch is difficult and the excavation volume is large; on the other hand, the amount of concrete filling on the inverted arch is greatly increased, resulting in waste

Method used

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  • Pi-shaped plate and inverted arch combined tunnel bottom lining structure
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  • Pi-shaped plate and inverted arch combined tunnel bottom lining structure

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0019] refer to figure 1 , the π-shaped plate and inverted arch combined tunnel bottom lining structure of the present invention includes primary support structure, secondary lining structure and waterproof and drainage system 20, and the secondary lining structure consists of secondary lining arch wall section 30, secondary lining tunnel Bottom structure. The secondary lining tunnel bottom structure is composed of an inverted arch 31 and a π-shaped plate arranged on the inverted arch 31. The π-shaped plate is composed of a top plate 40, a left vertical plate 41 and a right vertical plate 42. The left vertical plate The upper ends of the plate 41 and the right vertical plate 42 are consolidated with the top plate 40, and the lower ends are consolidated with the inverted arch 31. The horizontal ends of the top plate 40 are consolidated with the two end...

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Abstract

The invention relates to a pi-shaped plate and inverted arch combined tunnel bottom lining structure. By transforming the traditional tunnel lining tunnel bottom structure style, the stress performance of a lining structure, especially a tunnel bottom structure, under the action of high water pressure or high ground stress is improved, and meanwhile, a drainage system in a tunnel is optimized, the drainage capacity of the tunnel is increased, and the water disaster risk of rainfall flood seasons during operation is reduced by combining the lining tunnel bottom structure. The pi-shaped plate and inverted arch combined tunnel bottom lining structure comprises an initial support structure, a secondary lining structure and a waterproofing and drainage system, wherein the secondary lining structure consists of a secondary lining arch wall segment and a secondary lining tunnel bottom structure, and the secondary lining tunnel bottom structure consists of an inverted arch and a pi-shaped plate arranged on the inverted arch; the pi-shaped plate consists of a top plate, a left-side vertical plate and a right-side vertical plate, and the upper ends of the left-side vertical plate and the right-side vertical plate and the top plate are fixedly combined together; the lower ends of the left-side vertical plate and the right-side vertical plate and the inverted arch are fixedly combined, and the two transversal ends of the top plate and the two ends of the inverted arch are fixedly combined; a corridor formed among the left-side vertical plate, the right-side vertical plate, the top plate and the secondary lining inverted arch can be used as a longitudinal drainage channel of the tunnel.

Description

technical field [0001] The invention relates to a tunnel lining structure, in particular to a tunnel lining structure under the condition that underground water develops or is greatly affected by seasons, and the tunnel bottom water pressure or ground stress is relatively high. Background technique [0002] Since the beginning of the 21st century, my country's railway construction has developed rapidly, and more and more high-standard double-track railways with a speed of more than 200km / h have been built. Especially in the western mountainous areas, the line development is restricted by various factors such as large curve radius and complex topographic and geological conditions. , The scale of tunnels is getting bigger and bigger. On the one hand, there are more and more long-term karst water-rich tunnels, and on the other hand, there are more and more tunnels with high ground stress. [0003] In recent years, during the operation of Yiwan, Shanghai-Kunming, Guiguang and oth...

Claims

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Application Information

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IPC IPC(8): E21D11/08E21F16/02
CPCE21D11/08E21F16/02
Inventor 卿伟宸张磊高杨郑伟孟祥磊林本涛朱勇陶伟明钟昌桂曾宏飞黄华王若晨
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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