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OALib Journal期刊
ISSN: 2333-9721
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水平冻结水泥土加固盾构洞门温度场敏感性分析
DOI: 10.3969/j.issn.1000-2006.2013.03.026, PP. 145-151
Keywords: 水平冻结,温度场,数值模拟,敏感性分析,盾构
Abstract:
根据苏州轨道交通2号线火车站东风井盾构进出洞2#洞门水平冻结加固工程要求,利用有限元软件进行数值模拟,对掌子面对流系数、土体导热系数、容积热容量、相变潜热、水泥参量等因素进行敏感性分析。结果表明:掌子面对流系数、土体容积热容量与冻结效果呈线性递减关系;土体导热系数与冻结效果呈线性递增关系;相变潜热基本不影响冻结效果;在水泥土中进行冻结时存在一冻结最佳水泥参量,粉质黏土中为12%、粉砂土中为16%。
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