土工基础

›› 2015, Vol. 29 ›› Issue (5): 19-22.

• 工程实录 • 上一篇    下一篇

谷竹高速公路珠藏洞隧道进口段边坡稳定性评估

王红明 1,罗红明2,3,张 璋 4,汪建平 5   

  1. （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）
  • 收稿日期:2015-08-17 出版日期:2015-10-20 发布日期:2015-11-06
  • 作者简介:王红明（1981-），男，本科，工程师，研究方向为岩土工程勘察设计和地质灾害勘察设计评估方面。 通讯作者：罗红明（1980-），男，博士，助理研究员，研究方向为岩土体稳定性评价及处治技术。
  • 基金资助:

    基金项目：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)。

Stability Evaluation of the Zhucangdong Tunnel Entrance Slope in Gucheng-Zhuxi Expressway

WANG HongMing1, LUO Hongming2,3, ZHANG Zhang4, WANG Jianping5   

  1. (1.Hubei Transportation Planning & Design Institute, Wuhan,430051;
    2.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of 
    Rock and Soil Mechanics, Chinese Academy of Science, Wuhan 430071;
    3.Engineering Research Center for Rock-Soil Drilling, Excavation and Protection, 
    Division of Education, China University of Geosciences, Wuhan 430074;
    4.Xiangyang Real Estate development Co. Ltd., National Real Estate Development Group Co., Xiangyang 441000;
    5.Kunming Engineering Co. Ltd., Power Construction Corporation of China, Kunming 650051)
  • Received:2015-08-17 Online:2015-10-20 Published:2015-11-06

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。

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

Abstract: 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 performed 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 recommendations 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.

Key words: Highway Slopes, Geological and Environmental Conditions, Discrete Element Method, Blasting Vibration, Stability Evaluation