摘要
盾构隧道的渗流对隧道的长期沉降等长期性态有重要的影响。针对软土盾构隧道的特点,假设隧道达到稳定渗流时,作用于衬砌外壁的总水头为一个未知常量,在此假设基础上,推导出隧道周围土体渗流场的发展及孔隙水压力的分布。通过土体渗入隧道的渗流量与通过衬砌渗入隧道的渗流量相等这一等量关系,计算衬砌外壁的未知常量水头。得到隧道稳定渗流时的渗流场和渗流量的解析解。最后,通过与数值模拟以及已有解析解答的对比,验证了解析方法的合理性。
Leakage into shield-driven tunnel has a great influence on the tunnel＇s long-term behavior such as long-term settlement.Considering the characteristic of the shield-driven tunnel in soft soil,the assumption is proposed that the total water head on the external surface of the lining is an unknown parameter when the steady leakage reached.Based on this assumption,the solution for leakage field can be derived.The unknown total head on the external surface of the lining can also be derived by using the equation that the water inflow from the soil into the tunnel must be equal to the water inflow through the lining.And a close-formed solution for leakage field and water inflow into shield-driven tunnel is derived.The results derived in this paper is finally compared with the numerical simulation and the solution by Shin（2010）,it shows that the analytical method is reasonable and reliable.
出处
《地下空间与工程学报》
CSCD
北大核心
2013年第1期37-41,72,共6页
Chinese Journal of Underground Space and Engineering
基金
上海市自然科学基金资助(No.12ZR1433600)
长江学者和创新团队发展计划资助项目(IRT1029)
关键词
盾构隧道
渗流场
解析解
shield-driven tunnel
leakage field
analytical solution
