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qian mai da duan mian sui dao shi gong fang fa you hua fen xi
Author(s): 
Pages: 261-265
Year: Issue:  4
Journal: Highway

Keyword:  隧道应力控制位移控制数值模拟分析;
Abstract: 利用有限元计算法对与路基同宽的三车道隧道浅埋段双侧壁导坑法、CRD法、三台阶法、CD法等4种施工工法进行了比选。通过计算和比较这4种施工方法下围岩应力控制效果、位移控制效果,表明双侧壁导坑法可以更好地发挥围岩自身承载能力和初期衬砌支护作用,有利于提高二次衬砌的安全储备;CRD法对隧道两侧边墙水平位移控制比较有利,但对隧道顶部围岩沉降控制不如双侧壁导坑法有效;其他两种方法较差。从总体上分析,得出结论,双侧壁导坑法更适合于马林隧道浅埋段施工。
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