Dynamic response and pore pressure model of the saturated soft clay around the tunnel under vibration loading of Shanghai subway
Dynamic response and pore pressure model of the saturated soft clay around the tunnel under vibration loading of Shanghai subway
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DOI：
10.1016/j.enggeo.2008.01.014
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发表时间：
2008-05-22
影响因子：
7.4
通讯作者：
Zhao, Shu-Kai
中科院分区：
文献类型：
--
作者：
Tang, Yi-Qun;Cui, Zhen-Dong;Zhao, Shu-Kai
本文对上海地铁2号线京寺站与江苏站之间隧道周围的饱和软土进行了研究。采用埋置式土压力计和孔压计对隧道周边进行连续动态监测。研究了地铁振动荷载作用下饱和软土的响应频率和应力幅值随隧道距离的变化规律。提出了土中动压响应衰减的计算公式。在连续现场监测数据的基础上，利用实验室GDS （Global Digital System）试验装置，探讨了隧道周围饱和软土孔隙水压力随距离的变化规律。通过GDS试验，提出了振动荷载作用下饱和软黏土孔隙水压力增大的模型。现场监测数据也对其进行了修正。最后得到模型。研究结果为地铁隧道的设计、施工及安全运行提供了有价值的参考。(c) 2008 Elsevier B.V.版权所有
This paper studies the saturated soft clay around the tunnel between Jingansi Station and Jiangsu Station of Shanghai subway line No.2. The continuous dynamic monitoring is conducted by means of embedded earth pressure piezometers and pore piezometers around the tunnel. The response frequency and stress amplitude of the saturated soft clay are studied with the distance from the tunnel due to the subway vibration loading. A formula is proposed for the attenuation of the dynamic pressure response in the soil. Then, based on the continuous field monitored data, and using the laboratory GDS (Global Digital System) test apparatus, the developing law of the pore water pressure of the saturated soft clay around tunnel is explored with the distance. By the GDS test, the model of the increasing pore water pressure of the saturated soft clay is put forward under the vibration loading. it is also amended by field monitored data. Finally the model is obtained. The result offers a valuable reference to the design, construction and the safe operation of the subway tunnel. (c) 2008 Elsevier B.V. All rights reserved.