Tunnel type composite anchorage

A tunnel-type anchorage technology, applied to bridge parts, bridges, buildings, etc., can solve problems such as poor tunnel-type anchorage, achieve the effect of improving bearing capacity and reducing project cost

Inactive Publication Date: 2012-02-15
SICHUAN DEPT OF TRANSPORTATION HIGHWAY PLANNING PROSPECTING & DESIGN RES INST
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a tunnel-type composite anchorage, which can effectively solve the stren

Method used

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  • Tunnel type composite anchorage

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0015] refer to figure 1 and figure 2 , the tunnel-type composite anchor of the present invention includes a tunnel, an anchor plug body 21 and a front anchor chamber 22, the anchor plug body 21 is formed by filling and pouring concrete in the inner section of the tunnel, a buttress 23 is arranged in the front anchor chamber 22, and the main cable 10 The scatter saddle on the top of the buttress 23 is spread out and anchored to the front anchor surface of the anchor plug body 21 . The tunnel is provided with bolts 31 that penetrate from the surface of the bedrock into the surrounding rock at intervals on the vault section and the sidewall sections on both sides, and the primary support structure and secondary lining 35 are sequentially set inward from the surface of the bedrock. Anchor rod 31 can adopt segmental self-advancing type anchor rod in anch...

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Abstract

The invention discloses a tunnel type composite anchorage and can effectively solve the problems of the strength and the rheological problems of a bridge location tunnel type anchorage with worse rock quality, and furthermore, the safety of tunnel cavitation is easily guaranteed. The tunnel type composite anchorage comprises a tunnel, an anchor plug body (21) and a front anchor room (22), wherein the anchor plug body (21) is formed by concrete which is filled and poured into the inner section of the tunnel; a rest pier (23) is arranged in the front anchor room (22); a main cable (10) is scattered by a rope scattering saddle at the top of the rest pier (23), and then, is anchored on the front anchor surface of the anchor plug body (21); anchor rods (31) which penetrate into a surrounding rock from the surface of a bedrock are distributed at the arch crown section and two side wall sections of the tunnel at intervals; a primary supporting structure and a secondary lining (35) are inwards arranged in sequence from the surface of the bedrock; a prestressed anchor rope (24) which penetrates through the anchor plug body (21) and the inner end surface of the tunnel and enters a deep rock mass is distributed and arranged along the axial direction of the tunnel; and two ends of the prestressed anchor rope (24) are fixedly connected with the front anchor surface of the anchor plug body (21) and the deep rock mass anchor respectively.

Description

technical field [0001] The invention relates to bridge engineering, in particular to a tunnel-type anchorage structure suitable for large-span suspension bridges in mountainous areas. Background technique [0002] Modern suspension bridges are mainly composed of four major components: anchorage, cable towers, cable systems, and stiffening beams. As an important component that transmits cable force to the foundation, anchorage is generally divided into two types: gravity anchorage and tunnel anchorage. The gravity anchorage relies on the self-weight of the anchorage to balance the huge pulling force of the main cable, while the tunnel anchorage makes full use of the interaction between the anchorage and the surrounding rock mass to anchor the main cable. [0003] Compared with the gravity anchor, the tunnel anchor is cheap. For example, the George Washington Bridge in the United States was built in 1931. The gravity anchor requires 107,000 m of concrete 3 , the tunnel ancho...

Claims

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Application Information

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IPC IPC(8): E01D19/14
Inventor 谭邦明曹发辉庄卫林蒋劲松朱栓来陶齐宇宋扬黎志忠石成黄麟张新王凌云卢小峰孙安洪余翔王崇汉李劲松
Owner SICHUAN DEPT OF TRANSPORTATION HIGHWAY PLANNING PROSPECTING & DESIGN RES INST
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