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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

DOI: 10.3969/j.issn.1674-0696.2011.06.09, PP. 1298-1302

Keywords: 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,AizhaiSuperSuspensionBridge,tunnel-typeanchorage,rockmassstabilityanalysis,rockmassreinforcement,geologicalanalysis

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Abstract:

:？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。

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