圆形地连墙初始缺陷对其受力性状的影响

Influence of Initial Defects on the Mechanical Properties of Circular Diaphragm Walls

受实际施工工艺的限制,圆形地连墙支护结构并不连续,实际是各成槽段组成的正多边形,势必会对地连墙的受力性状产生影响。以云南滇中引水倒虹吸工程接收井圆形基坑为背景模型,建立正十四边形地连墙与圆形地连墙的数值模型,从而获得地连墙开挖过程中的力学参数模拟值,并将之与实际工程的弯矩、位移监测值进行分析比较,得出其变化规律。

Limited by actual construction process,the support structure of circular diaphragm wall is not continuous,and is actually a regular polygon diaphragm wall composed of each groove segment,which will inevitably affect the mechanical behavior of diaphragm wall.Taking the circular foundation pit of the receiving shaft of inverted siphon project in Dianzhong Water Diversion Project in Yunnan Province as the background,the numerical models of the regular tetradecagon diaphragm wall and the circular diaphragm wall are established respectively,and the mechanical parameters of these two kinds of diaphragm walls during excavation process are simulated.The simulation results are compared with actual monitoring values of bending moment and displacement in the project,and the change rules are obtained.