论文部分内容阅读
文章采用室内缩尺模型试验对基坑开挖下土压力分布、变形机制进行了分析,并研究了水体对基坑开挖效应的影响。结果表明:随着开挖深度的加大,基坑周围的应力值在减小,且与开挖深度处于同一深度的土体的应力变化幅度最大,尤其在邻水状态下,应力变化幅值曲线会有明显的拐点;基坑侧向位移逐渐增大,但增幅逐渐减小,非邻水状态下位移曲线走势平滑稳定,邻水状态下位移在开挖深度达到一定值时会有减小趋势。试验研究成果对基坑开挖效应的分析,特别是邻水基坑的研究具有一定的参考价值。
The article uses the indoor scale model test to analyze the earth pressure distribution and deformation mechanism under excavation, and studies the influence of water body on the excavation effect of foundation pit. The results show that with the increase of the excavation depth, the stress around the foundation pit decreases and the stress change amplitude of the soil body at the same depth with the excavation depth is the largest. Especially in the adjacent water condition, the magnitude of stress change The curve will have a significant inflection point. The lateral displacement of foundation pit gradually increases, but the increment decreases gradually. The displacement curve of non-adjacent water is smooth and stable. The displacement in the state of adjacent water will decrease when the depth of excavation reaches a certain value trend. The results of experimental research on the excavation effect of foundation pit, especially for the study of adjacent water foundation pit has some reference value.