锚索双排桩深基坑开挖受力特性研究  

Study on mechanical behavior of deep foundation pit with anchored double-row piles

作　　者：王义军[1] WANG Yijun(Chengdu Institute of Survey and Investigation,Chengdu 610081,China)

机构地区：[1]成都市勘察测绘研究院,四川成都610081

出　　处：《山东理工大学学报（自然科学版）》2020年第3期74-78,共5页Journal of Shandong University of Technology:Natural Science Edition

摘　　要：通过对实际工程锚索双排桩深基坑的开挖计算分析,研究矩形布桩方式的双排桩受力变形特征。结果表明:(1)前排桩开挖面以上主要承受被动土压力,开挖面以下主要承受主动土压力;(2)受冠梁的约束,前后排桩顶部位移相同,但桩顶以下前排桩的位移小于后排桩的位移;(3)锚索只对双排桩的剪力分布有较大影响,对弯矩分布、最大弯矩值、位移的影响较小;(4)后排桩基坑开挖面以上土压力为主动土压力,在基坑开挖面以下土压力主要为被动土压力。Through the excavation calculation of the deep pit of the double-row piles in the actual engineering,force and deformation characteristics of double-row piles in a rectangular pile arrangement are studied.The results are summarized below(1)The front row above the excavation surface is mainly subjected to passive earth pressure,and that below the excavation surface is mainly subjected to active earth pressure.(2)Bounded by crown beam,the top displacements of the front and rear piles are same,but under the pile top,the displacement of the front pile is smaller than that of the back pile.(3)The anchorage cable only has a great influence on the shear distribution of the double row pile,showing little effect on the bending moment distribution,the maximum bending moment value and the displacement.(4)The earth pressure above the excavation surface of the back piles is the active earth pressure,and the earth pressure below the excavation surface of the foundation pit is mainly passive earth pressure.

关 键 词：深基坑 水平位移 双排桩 卵石土层 

分 类 号：TB532.1[理学—物理] TB553[理学—声学]