矮寨悬索桥茶洞岸构筑物围岩及山体稳定性研究

doi:10.3969/j.issn.1674-0696.2011.06.09

重庆交通大学学报（自然科学版） ›› 2011, Vol. 30 ›› Issue (6): 1298-1302.DOI: 10.3969/j.issn.1674-0696.2011.06.09

矮寨悬索桥茶洞岸构筑物围岩及山体稳定性研究

彭建国¹，张奇华²，胡惠华¹，龙树威¹

1. 湖南省交通规划勘察设计院，湖南长沙410008; 2. 长江科学院，湖北武汉430010

收稿日期:2011-03-02 修回日期:2011-07-25 出版日期:2011-12-15 发布日期:2015-01-22
作者简介:彭建国(1964—)，男，湖南长沙人，高级工程师，硕士，主要从事公路桥梁勘察设计方面的研究。E-mail:pengjianguo@hnjtsjy.com。
基金资助:
交通运输部西部交通建设科技项目(200631879846)

Surrounding Rock Structures and Mountain Stability of Chadong Bank of the Aizhai Suspension Bridge

PENG Jian-guo¹，ZHANG Qi-hua²，HU Hui-hua¹，LONG Shu-wei¹

1. Hunan Provincial Communications Planning，Survey ＆ Design Institute，Changsha 410008，Hunan，China; 2. Yangtze River Scientific Research Institute，Wuhan 430010，Hubei，China

Received:2011-03-02 Revised:2011-07-25 Online:2011-12-15 Published:2015-01-22

摘要/Abstract

摘要： 调查分析了矮寨特大悬索桥茶洞岸岩体施工期间所暴露的地质缺陷及稳定问题; 采用三维数值分析方法，计算了在岩体开挖后、施加主缆荷载后等工况下，隧道锚、索塔基础与公路隧道围岩及山体的稳定性，及构筑物相互影响; 提出了工程支护的措施。研究结果表明: 岩体稳定问题主要集中在桥台边坡上，施加工程设计荷载不会对岩体稳定造成明显影响，构筑物之间相互影响不大; 隧道锚因围岩挤压效应而产生强大的抗拔能力，其承载能力可能被严重低估。

关键词: 矮寨特大悬索桥, 隧道式锚碇, 岩体稳定分析, 岩体加固, 地质分析

Abstract: Geological defects and stability problems of Chadong bank of Aizhai Super Suspension Bridge exposed in the excavation are investigated and analyzed． Based on these，by means of three-dimensional numerical analysis，surrounding rock stability of tunnel-type anchorage，caber tower and highway tunnel，as well as mountain stability are analyzed in different construction stages，including the condition stage after the rock mass excavation and the exertion of design load． Rock mass reinforcement is designed based on the results of numerical analysis． Analysis results show that stability problems focus on the stability of abutment slope，the influence of the design load on stability of rock mass is very limited，and mutual effects between structures are also limited． Tunnel-type anchorage can generate very huge pull-resistance force，which is caused by surrounding rock mass’‘squeezing effect’and the bearing capacity of tunnel-type anchorage may be underestimated severely．

Key words: Aizhai Super Suspension Bridge, tunnel-type anchorage, rock mass stability analysis, rock mass reinforcement; geological analysis

中图分类号:

TU45

彭建国，张奇华，胡惠华，龙树威. 矮寨悬索桥茶洞岸构筑物围岩及山体稳定性研究[J]. 重庆交通大学学报（自然科学版）, 2011, 30(6): 1298-1302.

PENG Jian-guo，ZHANG Qi-hua，HU Hui-hua，LONG Shu-wei. Surrounding Rock Structures and Mountain Stability of Chadong Bank of the Aizhai Suspension Bridge[J]. Journal of Chongqing Jiaotong University(Natural Science), 2011, 30(6): 1298-1302.

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矮寨悬索桥茶洞岸构筑物围岩及山体稳定性研究

Surrounding Rock Structures and Mountain Stability of Chadong Bank of the Aizhai Suspension Bridge

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