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双排围护桩支护结构作为一种新型的深基坑支护形式,在理论研究上尚不成熟,目前尚无统一的设计计算方法。在排距、桩体刚度、桩间土性质、被动区土性质改变的情况下,结构的变形和受力相应的变化目前研究很少,且大多局限在二维分析计算中,对于空间门架式结构的双排围护桩结构存在较大的缺陷。本文应用大型有限元程序ADINA,模拟上述不同工况,得出结构的三维位移场和应力场的变化规律,为结构的优化设计提供可量化的依据。最后结合工程实际,对比分析计算结果和实测结果,得出ADINA计算结果较好地反映了工程实际,计算结果比较可靠。
As a new type of deep foundation pit support structure, double-row retaining wall retaining structure is not yet mature in theoretical research. So far, there is no unified design and calculation method. In the case of the row spacing, the rigidity of the pile body, the nature of the piles between the piles and the nature of the passive zone, there are few studies on the structural deformation and the corresponding changes of the forces at present, and most of them are limited in the two-dimensional analysis and calculation. Structure of double-row retaining pile structure there is a big flaw. In this paper, large-scale finite element program ADINA is used to simulate the above-mentioned different working conditions, and the variation law of the three-dimensional displacement field and stress field of the structure is obtained, which can provide a quantifiable basis for the optimal design of the structure. Finally, according to the engineering practice, comparative analysis of the calculation results and the measured results shows that the calculation results of ADINA better reflect the actual project, and the calculation results are more reliable.