盾构下穿流塑状残积粉质黏土地层扰动规律研究
发布时间：2018-10-31 11:57
【摘要】：为了揭示盾构下穿流塑状残积粉质黏土地层扰动规律,依托长沙市地铁1号线黄兴广场站~南门口站区间隧道工程,采用FLAC3D构建盾构下穿流塑状残积粉质黏土三维数值模型,探讨盾构下穿流塑状残积粉质黏土地层和加固处理后的地层施工对地表沉降及地层变形规律的影响。研究结果表明:盾构区间采用旋喷桩加固时,其地表沉降值及沉降槽宽度相比原状土区域(即未经过旋喷加固区域)均有较大幅度的减小。可见,采用旋喷桩加固对流塑状残积粉质黏土地层加固效果明显。
[Abstract]:In order to reveal the disturbance law of plastic residual silty clay stratum under shield, relying on the tunnel project between Huangxing Square Station and South Gate Station of Changsha Metro Line 1, a three-dimensional numerical model of plastic residual silty clay under shield tunneling was constructed by FLAC3D. The influence of stratum construction on ground subsidence and formation deformation is discussed in this paper. The results show that the surface settlement and the width of the settlement trough in shield section are significantly reduced compared with those in the undisturbed soil area (i.e. the zone without the reinforcement of rotary jet grouting). Therefore, the reinforcement effect of rotary jet pile on convection plastic residual silty clay is obvious.
【作者单位】： 长沙市轨道交通集团有限公司;中南大学土木工程学院;
【基金】：国家自然科学基金资助项目(51538009,51578550) 湖南省住建厅资助项目(KY201634)
【分类号】：U455.43
本文编号：2302092
[Abstract]:In order to reveal the disturbance law of plastic residual silty clay stratum under shield, relying on the tunnel project between Huangxing Square Station and South Gate Station of Changsha Metro Line 1, a three-dimensional numerical model of plastic residual silty clay under shield tunneling was constructed by FLAC3D. The influence of stratum construction on ground subsidence and formation deformation is discussed in this paper. The results show that the surface settlement and the width of the settlement trough in shield section are significantly reduced compared with those in the undisturbed soil area (i.e. the zone without the reinforcement of rotary jet grouting). Therefore, the reinforcement effect of rotary jet pile on convection plastic residual silty clay is obvious.
【作者单位】： 长沙市轨道交通集团有限公司;中南大学土木工程学院;
【基金】：国家自然科学基金资助项目(51538009,51578550) 湖南省住建厅资助项目(KY201634)
【分类号】：U455.43
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