摘要
为了更深入地了解地下盾构隧道施工引起的地层变形规律,基于透明土可视化技术及粒子图像测速技术,开展盾构隧道施工的模型试验。试验对盾构隧道开挖引发的地表沉降规律进行分析,并利用透明土可视化的优势,进一步探究土体内部位移场的分布特征。结果表明:试验获得的地表沉降规律与高斯分布有很好的一致性,且随着隧道埋深的增大,地表沉降值减少;土体内部地层最大沉降值与地层深度呈正相关,并得到透明砂土中土层沉降槽宽度系数沿深度变化的计算公式;隧道上方土体的水平位移沿深度方向呈现先减小后增大的特征,在水平方向表现为抛物线形式分布。
In order to understand the law of ground deformation caused by shield tunneling.A model test is carried out based on the visualization technology of transparent soil and particle image velocimetry technology.In the experiment,the law of surface settlement caused by shield tunnel construction were analyzed.And the law of the displacement field inside the transparent soil is explored.The results show that The surface settlement is consistent with the normal probability curve.And the ground settlement decreases with the increase of tunnel depth.The maximum settlement value of ground is positively correlated with the depth.And the formula for calculating the width coefficient of settlement trough along the depth in transparent sand is obtained.The horizontal displacement of the soil above the tunnel decreases first and then increases along the depth direction.And it is parabolically distributed along the vertical and horizontal direction.
作者
韩霖磊
张孟喜
吴惠明
肖晓春
包蓁
HAN Linlei;ZHANG Mengxi;WU Huiming;XIAO Xiaochun;BAO Zhen(Department of Civil Engineering, Shanghai University, Shanghai 200444, China;Shanghai Tunnel Engineering Ltd.,Shanghai 200032,China)
出处
《公路工程》
2021年第4期46-51,共6页
Highway Engineering
基金
国家自然科学基金资助项目(41172238)
上海隧道工程有限公司“北横通道”项目科研课题(2017-SK-2)。
关键词
隧道工程
模型试验
透明土
土体位移
沉降槽
tunnelling engineering
model test
transparent soil
soil displacement
settlement trough
