大跨浅埋公路隧道CRD法施工围岩松动圈量测与分析

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英文篇名：Test and Analysis on Loosing Zone of Surrounding Rock of Big-span Shallow Overburden Tunnel Constructed by CRD Method 中文刊名：交通标准化 英文刊名：Communications Standardization 作者：邵学富 ; 朱菊辉 ; 童立元 英文作者：SHAO Xue-fu1 ; ZHU Ju-hui1 ; TONG Li-yuan2 (1.The Expressway Construction Headquarters of Jiangsu Province ; Nanjing 210004 ; China ; 2. The Department of Underground Engineering ; Transportation College ; Southeast University ; Nanjing 210096 ; China) 中文关键词：大跨 ; 浅埋 ; CRD法 ; 松动圈 ; 隧道 英文关键词：big-span ; shallow overburden ; CRD method ; loosing zone ; tunnel 出版日期：2008-01-15 机构：江苏省高速公路建设指挥部,江苏省高速公路建设指挥部,东南大学交通学院地下系 江苏南京210004,江苏南京210004,江苏南京210096 年：2008 期：01 出版单位：交通标准化

摘要

新奥法原理指导下的CRD分部开挖技术是目前大跨浅埋公路隧道施工的主要方法。鉴于大跨浅埋隧道不同施工工艺下围岩扰动影响差异较大,以宁常高速茅山隧道为例,采用多点电测锚杆和多点位移计对CRD法施工过程的围岩深层扰动区位移及应力进行监测与分析,得出围岩分步开挖的松动过程及松动圈主要分布特点,同时对锚杆设计支护深度的合理性进行验证,可为优化设计及指导施工提供技术根据。
Based on the principle of New Austria Tunneling Method,the Cross Diaphragm Method is usually selected to construct big-span shallow overburden highway tunnel. Considering the difference of surrounding rock disturbing range of different construction scheme,the Mao Mountain Tunnel located on the Ning-Chang highway,was studied as an example. The deformation and stress of surrounding rock were monitored by using four-point electric monitoring rock bolts and displacement gauges when constructing with CRD method. The loosing process and distribution properties of loosing zone were analyzed. The results showed that the length of the rock bolts was reasonable and can be taken as references for the optimizing of design and construction schemes.

引文

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