摘要
T型墙+锚索体系利用了T型墙巨大的抗弯能力,同时使用锚索控制位移,是一种合理的支护结构体系。该支护体系可满足周边地质条件复杂,临近建筑物工程桩基础较密集,传统的锚索工艺难以实施,或相关部门不允许锚索逾越用地红线等限制的各种情况。结合广东佛山岭南天地18号地块工程案例,采用大型有限元分析软件对T型墙+锚索体系进行三维数值仿真模拟分析,对其在不同锚索设置情况下的受力情况进行对比分析。结果表明:T型墙+锚索体系对于支护结构性能有很大的提高作用,特别是T型墙+全倾斜锚索体系,无论在位移控制、T型墙内部应力分布控制还是在T型墙的弯矩控制都是个最优的组合;T型墙的翼缘和T脚位移基本一致说明翼缘和T脚变形是协同的,整个T型墙可以按照完整的T型梁来进行抗弯设计。
The T-shaped diaphragm wall plus anchor cable supporting system avail itself of great resistance to bending and using anchor cable to control displacement, thus a reasonable supporting structure system. The system can meet various restrictive conditions of peripheral complicated geological condition, rather concentrated pile foundations near the building engineering, where traditional anchor cable technology unfeasible, or anchor cable must not to exceed boundary line of land regulated by relevant departments. Refer to the engineering case of the Lingnantiandi housing estate No.18 block, Foshan, Guangdong carried out T-shaped diaphragm wall plus anchor cable supporting system 3D numerical analog simulation analysis using large scale finite element analysis software, contrastively analyzed stress conditions under different anchor cable arrangements. The result has demonstrated that： the system has largely improved supporting structure performances, especially the T-shaped diaphragm wall plus fully tilted anchor cable system is an optimal combination in terms of displacement control, T-shaped wall interual stress distribution control, or in T-shaped wall bending moment control. The displacements of T-shaped wall flange and foot are generally accorded illustrated that the deformations in flange and foot are coordinated; the bending design of whole T-shaped wall can follow the design of an integrated T type beam.
出处
《中国煤炭地质》
2013年第1期35-39,68,共6页
Coal Geology of China
关键词
地下连续墙
预应力锚索
两墙合一
无支撑支护体系
数值模拟分析
underground diaphragm wall
prestressed anchor cable
combined two walls
self-sustaining supporting system
numerical simulation analysis
