摘要
基坑施工过程失稳因素多,危险性较大,因此在基坑设计和施工过程中必须考虑内力和变形的发展变化问题.运用PLAXIS软件对钻孔灌注桩+三重管高压旋喷(摆喷)桩+预应力锚索支护体系支护条件下深基坑开挖过程进行模拟计算,分析了基坑水平位移、竖直位移和围护桩内力,并与实测值进行比较.结果表明,利用有限元法可以很好地模拟各开挖工况,计算出基坑的水平位移和竖直位移,围护桩和锚索的轴力、剪力和弯矩,能够形象直观地反映基坑各工况下的受力状态.
In the process of foundation pit construction, there are many unstable factors and great risks. Therefore, the development and change of internal force and deformation must be considered in the design and the process of foundation pit construction. By using PLAXIS software, the excavation process of the deep foundation pit under the support system of bored cast-in-place pile + triple pipe high-pressure rotary jet(swing jet) pile + prestressed anchor cable is simulated, and the horizontal displacement, vertical displacement and support of foundation pit are analyzed, and compared with the measured value. The results show that the finite element method can simulate the excavation conditions well, calculate the horizontal displacement, vertical displacement of the foundation pit, and the axial force, shear force and bending moment of the retaining pile and anchor cable, and it can visually reflect the stress state of the reaction foundation pit under various working conditions.
作者
曹文峰
CAO Wenfeng(School of Horticulture and Landscape,Fujian Vocational College of Agriculture,Fuzhou,Fujian 353001,China)
出处
《湖南城市学院学报（自然科学版）》
CAS
2020年第2期10-15,共6页
Journal of Hunan City University:Natural Science
基金
福建农业职业技术学院科研项目(2018JS008)。
关键词
深基坑
桩锚支护
开挖
有限元
deep foundation pit
pile-anchor support
excavation
finite element
