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谷竹高速公路珠藏洞隧道进口段边坡稳定性评估

ISSN号：1004-3152
期刊名称：《土工基础》
时间：0
分类：P642[天文地球—工程地质学;天文地球—地质矿产勘探;天文地球—地质学]
作者机构：[1]湖北省交通规划设计院,武汉430051, [2]中国科学院武汉岩土力学研究所,岩土力学与工程国家重点实验室,武汉430071, [3]中国地质大学(武汉)岩土钻掘与防护教育部工程研究中心,武汉430074, [4]中房集团襄阳房地产开发股份有限公司,湖北襄阳441000, [5]中国电建集团昆明勘测设计研究院有限公司,昆明650051
相关基金：国家自然科学基金项目(41402318);中国地质大学岩土钻掘与防护教育部工程研究中心开放课题基金项目(201306)

关键词：边坡, 地质环境条件, 离散单元法, 爆破振动, 稳定性评估, Highway Slopes, Geological and Environmental Conditions, Discrete Element Method, Blasting Vibration, Stabili-ty Evaluation

中文摘要：

高速公路边坡稳定性评估对于公路建设方案优化，提高边坡支护工程措施的科学性和使用安全性，保证高速公路边坡正常建设和安全运营具有重要的现实意义。充分考虑边坡地质环境条件，综合分析谷竹高速公路珠藏洞隧道进口段边坡的稳定性，并分析评估隧道爆破施工对边坡稳定性的影响。评估结果表明边坡整体处于稳定，隧道爆破振动对边坡稳定性的影响很小，但不能排除在暴雨、地震、爆破震动等特殊条件下，边坡会发生局部掉块的可能性；建议采取系统锚杆和适当的预应力锚索支护，并对局部岩体破碎区采取柔性网防护。

英文摘要：

The stability evaluation of the highway slopes has important roles in the cut slope optimization, improving the safety of the slope stability mitigation measures as well as the safe operation of the highways. The slope stability evaluation was per- formed for an entrance slope of Zhucangdong Tunnel in the Gucheng-Zhuxi Expressway project by considering site geological and environmental conditions. In the meantime, the impact of the blasting vibration on the slope stability was also estimated. The analytical results indicate that the current slope is globally and marginally stable except for the local instabilities under the extreme conditions such as, heavy precipitation, seismic as well as excessive blasting induced vibrations. The mitigation recom- mendations include ground anchors plus some of the prestressed anchors at some locations. The flexible rock fall wire mesh nets are also recommended at broken rock mass areas.