基坑开挖若采取慢速施工或者人工开挖的方法,由于土层透水性能好,基坑中水比较容易排出,通常近似认为固结排水过程。文章介绍的是在真三轴上模拟基坑开挖周边土体的应力路径,进行了排水卸荷试验,通过对试验成果的研究,分析了卸荷排水状态下土体的变形性质。 If the excavation of the foundation pit adopts the method of slow construction or manual excavation, the water in the foundation pit is relatively easy to discharge due to the water-permeable performance of the soil layer, and it is generally considered that the consolidation drainage process is approximate. In this paper, the stress path of soils around the foundation pit excavation is simulated in the true triaxial. The drainage and unloading tests are carried out. The deformation properties of the soils under unloading and drainage are analyzed through the research of the test results.