中国铁道科学2017，Vol.38Issue(6)：70-78,9.DOI:10.3969/j.issn.1001-4632.2017.06.10
砂土地层地铁盾构隧道施工对地层沉降影响的模型试验研究
Model Test Study on Influence of Ground Settlement Caused by Shield Tunnel Construction in Sand Stratum
摘要
Abstract
In order to study the ground loss difference and settlement pattern at different depth under the disturbance caused by metro shield tunnel construction in sand stratum,a model test,which took dry sand as filler and simulated the ground loss by releasing soil gradually,was conducted to study the ground settlement and soil stratum settlement caused by soil loss during shield tunnel construction in sand stratum.Results show that the ground loss increases in the form of power function from ground surface down,and a strong positive correlation is between both the maximum settlement and the width coefficient of settlement trough with ground loss during shield tunnel construction in sand stratum.With the increase of the buried depth of stratum,the settlement pattern changes from Gaussian curve to chimney.The width coefficient of settlement trough remains relatively stable after reaching a certain value.The maximum settlement increases continuously,which plays a major role in the increase of ground loss.According to the Gaussian settlement pattern in sand stratum,the relationship is set up between the sand ground loss at different buried depths and ground surface loss,and the calculation method for sand ground loss at different buried depths is put forward based on statistical analysis principle.The calculation formulas for the maximum settlement of sand ground loss and the width coefficient of settlement trough at different buried depths are corrected according to experimental data.Finally,the calculation formula for ground settlement at different buried depth is obtained.关键词
砂土地层/地铁隧道/盾构法施工/模型试验/地层损失/地层沉降Key words
Sand stratum/Metro tunnel/Shield construction/Model test/Ground loss/Ground settlement分类
交通工程引用本文复制引用
王海涛,金慧,涂兵雄,张景元..砂土地层地铁盾构隧道施工对地层沉降影响的模型试验研究[J].中国铁道科学,2017,38(6):70-78,9.基金项目
国家自然科学基金资助项目(51208073) （51208073）
辽宁省“百千万人才工程”人选择优资助项目(2014921061) （2014921061）
辽宁省高等学校优秀人才支持计划项目(LJQ2014049) （LJQ2014049）
大连市高层次人才创新支持计划项目(2015R073) （2015R073）
