岩土力学Issue(11)：3210-3216,7.DOI:10.16285/j.rsm.2015.11.023
多功能孔压静力触探在基坑工程降水设计中的应用分析
Application of multifunctional SCPTU to dewatering design for deep excavation
摘要
Abstract
Based on the laboratory and in situ seismic piezocone tests (SCPTU), comprehensive analyses of soils sampled from the Yangtze River floodplain at the Nanjing Fourth Bridge site were conducted, including the fine division of the soil layer, permeability evaluation of clayey soils and hydraulic conductivity prediction. It is shown that the measured parameters of SCPTU (qt、fs、u2) can be used effectively for profiling the highly layered and heterogeneous deposits in the Yangtze River floodplain, especially for identifying the soil interfaces, thin permeable or impermeable interlayers. Based on the dissipation of excess pore pressure in the process of SCPTU testing, the permeability of the complicated mixed soils can be evaluated. Based on SCPTU, the predicted kh values show significant discreteness. It is observed that the lab measured kh values are generally lower than those estimated from SCPTU within 1-2 orders of magnitude. The results from Burns&Mayne method (2002) can be used in the planning phase of civil engineering works. It is suggested that such an enhanced seismic piezocone test should be considered to be a new tool for the dewatering design of foundation pit engineering.关键词
地震波孔压静力触探(SCPTU)/长江漫滩/分层/透水性/渗透系数/基坑降水Key words
seismic piezocone test/Yangtze River floodplain/stratigraphy/permeability/hydraulic conductivity/dewatering分类
建筑与水利引用本文复制引用
童立元,刘松玉,郑灿政,杨溢军,王道纲..多功能孔压静力触探在基坑工程降水设计中的应用分析[J].岩土力学,2015,(11):3210-3216,7.基金项目
“十二五”国家科技支撑计划项目资助（No.2012BAJ01B02）；苏州轨道交通交通有限公司科研专项（No.szgdky2013003）；国家自然科学基金资助（No.41572273）。@@@@Project supported by the National Key Technology Research and Development Program of the Ministry of Science and Technology of China (Grant No.2012BAJ01B02), the Research Projects Sponsored by Suzhou Rail Transit Co., Ltd.(Grant No.szgdky2013003) and the National Natural Science Foundation of China(Grant No.41572273) （Grant No.2012BAJ01B02）
