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中文摘要：
矩形顶管隧道施工会使周围土体产生扰动,进而引起超孔隙水压力,导致施工结束后继续产生固结沉降,对周围环境造成危害。采用Peck公式计算矩形顶管在施工阶段引起的地表沉降量;运用应力释放理论和应力传递理论,推导出矩形顶管隧道周围土体中任意一点的超孔隙水压力计算公式,采用分层总和法计算土体初始超孔隙水压力消散引起的工后地表固结沉降量;二者叠加得到工后地表总沉降量。提出固结开始t时刻的地表总沉降量计算方法,研究了地表沉降和地表沉降速率随时间的变化规律。算例分析结果表明：本文方法计算得出的沉降速率在施工结束后3个月内最大,之后迅速减小;横向地表固结沉降曲线和总的地表沉降曲线均符合正态分布规律。
英文摘要：
The excess pore water pressure and ground surface settlement would be induced by rectangular pipe jacking tunnel construction. In this paper,the ground surface settlement induced by rectangular pipe jacking during construction phase is calculated by Peck formula. The calculation formula for excess pore water pressure of surrounding rocks is derived by stress releasing theory and stress transmission theory. The post-construction ground surface settlement induced by dissipation of initial excess pore water pressure is calculated by layerwise summation method. The calculation method for total ground surface settlement after consolidation is proposed; and the relationship between ground surface settlement and time and that between ground surface settlement velocity and time are studied. The calculation results in case study show that： 1） The ground surface settlement velocity reaches peak after 3 months of construction,and then decreases rapidly. 2） The curves of horizontal ground surface settlement and total ground surface show normal distribution.
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