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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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隧道施工引起上覆土层变形规律研究
DOI: 10.3969/j.issn.1671-7627.2015.02.019, PP. 97-101
Keywords: 隧道施工,随机介质理论,土体变形,扩散传播
Abstract:
针对peck公式在预测隧道施工引起地面沉降中不能考虑上覆土体体积变化的局限性,根据随机介质理论,建立了基于扩散传播方程可以考虑上覆土体体积变化的土体变形计算模型,以地面沉降分布为其边界条件,求得隧道上覆土层变形的计算表达式。在此基础上,利用典型工程案例实测数据拟合反分析了模型参数。计算结果分析表明:考虑隧道施工引起土体体积变化的计算模式更符合实际情况,并总结了模型计算参数的取值与土体性质的关系,为隧道施工引起上覆土层变形的预测提供了一条合理的途径。
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