盾构隧道施工对近接管线影响模型试验研究

摘要

介绍了一种用于模拟盾构隧道施工引起地层损失的模型试验方法,并采用该试验手段,对管隧垂直工况下土体的沉降与地下管线的弯矩响应进行研究,结果表明:盾构扰动对其临近上方土体的影响最大,对两侧土体的影响与土体同隧道中心水平距离相关;管线的弯矩曲线基本呈现"W"形,并且随着地层损失的增加弯矩响应逐渐增大.%A model test method for simulating the ground loss due to shield tunnel construction was presented,the settlement of soil and bending moment of pipeline( in the case of pipeline vertical with tunnel)were studied using this method which were caused by the construction of shield tunnel. The results showed that the soil located up the tunnel was disturbed seriously by shield,the influence on the two-sided soil is relevant to the horizontal distance of the tunnel center of the earthwork,the bending moment curves of pipeline was a"W"pattern,and as the increase of ground loss,the bending moment increased gradually.