Lining structure for super large section water-rich loess tunnel of high-speed railroad

A super-large cross-section, high-speed railway technology, used in tunnel lining, tunnel, shaft lining and other directions to achieve long-term stability

Inactive Publication Date: 2009-12-09
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Lining structure for super large section water-rich loess tunnel of high-speed railroad
  • Lining structure for super large section water-rich loess tunnel of high-speed railroad
  • Lining structure for super large section water-rich loess tunnel of high-speed railroad

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[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] refer to figure 1 , The lining structure of the high-speed railway super-large section water-rich loess tunnel of the present invention includes an outer lining 10 and an inner lining 20, and the outer lining 10 is composed of a vault section 11, an arch wall section 12 and an inverted arch section 13 that seal the loess surrounding rock. refer to figure 2 , the arch foot portion 11a of the arch section 11 is widened laterally, and a circumferentially extending arch steel frame 11b is embedded in it, and the arch steel frame 11b is anchored to the loess surrounding rock by a locking foot bolt 11c. That is to say, after excavating the upper steps of the tunnel, the arch feet on both sides are respectively expanded to a certain width, and the steel frame 14 is erected, and after anchoring with the locking foot bolt 13, immediately spray concrete ...

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Abstract

The invention discloses a lining structure for a super large section water-rich loess tunnel of a high-speed railroad, aiming at effectively controlling the post-construction sedimentation of a tunnel structure and maintaining long-term stability. The lining structure comprises an outer lining (10) and an inner lining (20), wherein, the outer lining (10) comprises an arch crown section (11), an archwall section (12) and an inverted arch section (13) which seal loess wall rock; and the arch springing part (11a) of the arch crown section (11) is transversely widened, an arch crown steel frame (11b) which is extended in a circumferential direction is embedded in the arch springing part (11a), and the arch crown steel frame (11b) is anchored on the loess wall rock by a locking anchor bar (11c). The invention has the advantages of solving the technical problems of the construction of the super large section water-rich loess tunnel under the condition of water-rich loess geology, and can effectively control the post-construction sedimentation of the tunnel structure and maintain long-term stability; proved by the field shock excitation test simulating the running of high-speed train, the accumulated sedimentation of the filling surface of the inverted arch in the tunnel is not higher than 0.5mm after the 20 years running of the high-speed train.

Description

technical field [0001] The invention relates to a high-speed railway, in particular to a lining structure for a super-large-section water-rich loess tunnel of the high-speed railway. Background technique [0002] In recent years, my country has built a large number of road and railway tunnels in the loess area, some of which have relatively high soil water content, such as the Xinsongshuwan Tunnel on the Baolan Second Line and the Daonan Tunnel of the Huangyan Expressway. Accumulated some experience. However, these loess tunnels that have been built do not have high requirements for structural subsidence during the operation period. The initial support system composed of ordinary shotcrete anchor nets and steel frames is used. The focus is on ensuring the safety of the construction process, and less attention is paid to the tunnel. The problem of structural subsidence in the operation stage after construction is completed. In fact, in the past, road and railway loess tunnel...

Claims

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Application Information

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IPC IPC(8): E21D11/14E21D11/10
Inventor 杨建民喻渝马建林方钱宝薛富春黄棋鲍海荣赵华峰
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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