论文部分内容阅读
本文结合某实际工程,采用FLAC3D数值模拟,分析软土地区基坑底加固对悬臂式排桩支护结构的侧移、侧压力、地表沉降分布情况和变化规律,并结合现场监测数据与理正深基坑软件的计算结果进行对比验证。结果表明:排桩的侧移最大值出现在排桩顶部,坑底加固可使侧移减小1/3~1/2;坑底加固基本不改变排桩上土侧压力;地表沉降最大值发生在基坑边缘,坑底加固可使地表沉降减小约1/2;提出了坑底加固的深度和宽度的建议值。
In this paper, with a practical project, FLAC3D numerical simulation is used to analyze the lateral displacement, lateral pressure and surface subsidence of cantilever pile foundation supporting structure in the soft soil area and the variation regularity. Combined with the on-site monitoring data and Rational The calculation results of deep excavation software are compared and verified. The results show that the maximum displacement of row piles appears at the top of row piles, and the lateral displacement can be reduced by 1/3 ~ 1/2 with the bottom reinforcement. The bottom side reinforcement does not change the soil side pressure of row piles. The maximum surface settlement Occurred in the edge of the foundation pit, bottom reinforcement can reduce the surface subsidence about 1/2; proposed depth and width of the pit reinforcement recommended value.