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在我国东南沿海地区其复杂富水软土地基非常普遍,在该类区域钻孔灌注桩在施工成孔时经常发生孔壁失稳塌孔问题。为了深入分析和研究不同施工工艺与条件对钻孔灌注桩孔壁稳定性的影响规律,以不动广东石化某灌注桩工程为例,运用FLAC3D数值仿真模拟软件,对不同地下水埋深、稳定液比重、钻孔直径条件下的钻孔孔壁的变形规律进行了一系列的数值模拟研究与评价。
In China’s southeastern coastal areas of its complex water-rich soft soil foundation is very common in the region of bored piles in the construction of holes often occur when the hole wall collapse instability problems. In order to deeply analyze and study the influence law of different construction technology and conditions on the stability of borehole wall of cast-in-place bored pile, taking a fixed pile project of Guangdong Petrochemical as an example, using FLAC3D numerical simulation software, A series of numerical simulation studies and evaluations have been carried out on the deformation laws of the borehole wall under the conditions of specific gravity and drilling diameter.