【摘 要】
：
考虑到天然软黏土非均质性和各向异性特点,采用极限分析上限法在不排水条件下对盾构隧道开挖面稳定进行了研究,推导了极限支护压力的计算公式.土体非均质性和各向异性对极限
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考虑到天然软黏土非均质性和各向异性特点,采用极限分析上限法在不排水条件下对盾构隧道开挖面稳定进行了研究,推导了极限支护压力的计算公式.土体非均质性和各向异性对极限支护压力的影响有相互放大作用,在当土体非均质性和各向异性较强时,极限支护压力与隧道埋深的关系存在一个极大值.分析结果表明,在分析软土盾构隧道开挖面稳定性时,土体的非均质性和各向异性影响较大,不能忽略.
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