混凝土防渗墙接头大比尺模型试验与计算

Large scale model tests and computation of junction of concrete watertight wall

本文介绍了防渗墙接头大比尺模型试验，量测了混凝土防渗墙内的应力、廊道与防渗墙之间的相对位移以及填土表面的下沉．试验分空接头、软接头和刚性连接及插入式方案４种情况．对每种试验情况都进行二维和三维有限元计算，并将实测值与计算值对比．空接头防渗墙内应力在试验情况下只有刚性连接的一半，软接头及插入式方案的可减缓墙内应力．三维计算防渗墙应力与实测值符合，二维计算值偏大．

Abstract Large scale model tests for junction of concrete watertight wall are carried out. The stress distribution, relative displacement between the wall and corridor and the settlement of earthfill surface are measured. The tests including hollow junction, softened junction, stiff junction and inserted junction. The test results are compared with 2 D and 3 D finite element methods. It shows that the stresses of hollow junction are only one half of those of stiff junction. The stresses of inserted junction and the stresses of the stoff junction are higher than those of softened. The result obtained from 3 D FEM is better than that from 2 D FEM.