厦门翔安海底隧道不良地质段施工风险识别与应对

›› 2006, Vol. 27 ›› Issue (S1): 393-397.

厦门翔安海底隧道不良地质段施工风险识别与应对

张建斌^1，2

1. 河海大学水利水电学院，南京 210098；2. 厦门路桥建设集团有限公司，厦门 361009

收稿日期:2006-08-21 发布日期:2006-12-15
作者简介:张建斌，男，1975年生，博士研究生，主要从事地下工程方向研究

Risk identification and handling for tunnelling in poor ground conditions of Xiamen Xiang’an subsea tunnel

ZHANG Jian-bin^1,2

1. College of Water Conservancy & Hydropower Engineering, Hohai University, Nanjing 210098, China; 2.Xiamen Road and Bridge Construction Group co., Ltd., Xiamen 361009, China

Received:2006-08-21 Published:2006-12-15

摘要/Abstract

摘要： 修建海底隧道技术难度高、施工风险大，其中不良地质段是施工高风险地段。厦门翔安海底隧道是中国大陆地区第一条海底隧道，长6.05 km，最深处位于海平面下约70 m，采用设置服务隧道的3孔隧道方式，设双向6车道，钻爆法施工。隧道场区以花岗岩地层为主，主要不良地质段包括两端陆域及浅滩全强风化地段和海域多处风化深槽，其施工期风险管理尤为重要。应用风险评估与分析理论，探讨了海底隧道施工风险发生机制及风险水平评估方法。针对厦门翔安隧道施工图设计阶段的地质勘测、土建结构设计和拟采用的施工方法，对不良地质段施工期的典型地质风险和施工风险进行识别与风险水平评估，研究了降低风险的相应对策，以便在施工中对风险进行管理，采取必要措施保障施工安全与质量。

关键词: 海底隧道, 不良地质段, 地质风险, 施工风险, 风险评估, 对策

Abstract: Both high technology and high risk are involved in construction of the subsea tunnel, especially in poor ground condition sections. Xiamen Xiang’an tunnel is the first subsea tunnel in China mainland district. The tunnel is designed as a three-tube tunnel with 6-lane shuttle and the deepest point about 70m under sea level, built by means of boring and blasting method. The stratum of site is mainly composed of granite with some poor ground conditions including completely or strongly weathered granite in land and shallow section near to both portals as well as several significant faults in seabed. It is very important to achieve risk management in poor ground condition sections during tunneling in this case. Both the principle of risk occurrence and the method of risk evaluation for the construction of subsea tunnels are discussed based on the basic theory of risk analysis and evaluation. According to the geological prospecting, structure design and planned construction method in detail design phase of Xiamen Xiang’an tunnel, both typical geological risks and representative construction risks during tunnelling in poor ground condition sections were identified and evaluated by means of the method proposed in this paper. Countermeasures for reducing the risk level were proposed in order to implement a risk management to ensure the safety and quality of tunnelling.

Key words: subsea tunnel, poor ground condition section, geological risk, construction risk, risk evaluation, Countermeasures

中图分类号:

O 319.56

张建斌 . 厦门翔安海底隧道不良地质段施工风险识别与应对[J]. , 2006, 27(S1): 393-397.

ZHANG Jian-bin . Risk identification and handling for tunnelling in poor ground conditions of Xiamen Xiang’an subsea tunnel[J]. , 2006, 27(S1): 393-397.

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