摘要
位于饱和淤泥质粘质粉土中的深度为7.2～8.2m的深基坑,开挖时极易产生流土现象,且轻型井点降水和钢板桩基坑支护无法实施,采用了较经济的土钉墙基坑支护结构.并论述了土钉基坑支护结构的稳定性分析方法、基坑开挖过程中孔隙水压力的变化规律,以及采用不同应力路径时的土体抗剪强度指标进行基坑支护结构设计的合理性,同时论述了基坑支护结构设计时水土分算的不合理性.
For deep foundation pit7.2~8.2m in depth constructed in saturated mucky clayey silt,it tends extremely to lead to soil running during excavation,and the construction processes such as light dewatering by wells and supporting foundation pit with steel sheet pile seem unfeasible to use,so the relatively economical structure of soil-nailing wall supported foundation pit is applied.Introduced here are stability analysis method of soil-nailing wall supported foundation pit structure,changing law of neutral pressure during pit excavation,the reasonableness to use soil shear strength indexes of different stress paths for design of foundation pit supporting structure,and the unreasonableness of water&soil separated calculation for design of foundation pit supported structure.
出处
《中国市政工程》
2003年第3期24-27,共4页
China Municipal Engineering
