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为解决某深基坑不同支护方式的选择问题,为基坑工程设计与计算提供参考依据,运用岩土工程软件FLAC3D对某深基坑工程不同支护方式开挖过程中地表和围护结构变形安全性问题进行研究.研究结果表明:在内撑式排桩支护下FLAC3D数值模拟得到的地表和围护结构最大位移值分别是22 mm和20 mm,而在桩锚支护下地表和围护结构最大位移值是30 mm和25 mm.该深基坑工程采用内撑式排桩支护和桩锚支护都能够有效地抵抗基坑土体的位移,减小围护结构的水平位移,但内撑式排桩支护效果更好.
In order to solve the selection of different supporting ways for a deep foundation pit and provide references for the design and calculation of foundation pit engineering, the geotechnical engineering software FLAC3D is used to analyze the surface and envelope structure during the excavation of a deep foundation pit with different supporting methods The results show that the maximum displacements of the surface and retaining structures obtained by numerical simulation of FLAC3D under the inner row of piles are 22 mm and 20 mm, The maximum displacement of the retaining structure is 30 mm and 25 mm. The deep foundation pit project using the internal support row pile support and pile anchor can effectively resist the displacement of foundation soil, reducing the level of envelope Displacement, but the internal support row piling support better.