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变截面井筒式地下连续墙是在基于井筒式地下连续墙的基础上提出的一种新型的桥梁基础,其竖向承载性状的研究在国内外尚处于起步阶段。利用FLAC~(3D)模拟相同工程概况下的变截面井筒地下连续墙和井筒式地下连续墙,分析变截面地连墙基础和井筒式地连墙基础Q-S曲线、沉降特性、荷载分担比的变化规律,结果表明:变截面地连墙基础在沉降方面具有较好的性能,而且变截面地连墙内摩阻力得到有效发挥,可以有效降低群墙效应的影响。
The variable cross-section wellbore underground continuous wall is a new type of bridge foundation which is based on the wellbore underground continuous wall. The research on the vertical bearing properties is still in its infancy at home and abroad. By using FLAC 3D simulation of underground diaphragm wall and underground continuous diaphragm wall of variable section under the same project conditions, the QS curve, settlement characteristics and change of load sharing ratio between the foundation wall with variable section and the wall-connected diaphragm wall foundation were analyzed The results show that the foundation wall with variable cross section has better performance in settlement and the frictional resistance in the wall with variable cross section can be effectively exerted, which can effectively reduce the effect of group wall effect.