不同隧道埋深对地层变形的影响研究
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摘要
以哈尔滨地铁某区间隧道为工程背景,采用Midas-NX建立三维有限元模型,研究不同隧道埋深对地层变形的影响。指出随着隧道埋深的增大,双隧道开挖引起的土层变形也随之增大,主要是由于双隧道开挖将引起更大面积的土体扰动,难以形成上覆土拱效应。上覆土压力随隧道埋深的增加而增大,进而造成地表沉降的增大。
Based on the project of a tunnel in Harbin subway,Midas-NX was adopted to establish the three-dimensional finite element model to study the influence of the different tunnel depth on soil deformation. With the increase of the buried depth of the tunnel,the deformation of the soil layer caused by the excavation of the double tunnel also increases. It is because the double tunnel excavation caused soil disturbance of larger area,which leads it is difficult to form the overlying soil arch effect. With the increase of the buried depth of the tunnel,the overlying earth pressure increases,and causes the increase of ground settlement.
Based on the project of a tunnel in Harbin subway,Midas-NX was adopted to establish the three-dimensional finite element model to study the influence of the different tunnel depth on soil deformation. With the increase of the buried depth of the tunnel,the deformation of the soil layer caused by the excavation of the double tunnel also increases. It is because the double tunnel excavation caused soil disturbance of larger area,which leads it is difficult to form the overlying soil arch effect. With the increase of the buried depth of the tunnel,the overlying earth pressure increases,and causes the increase of ground settlement.
引文
[1]韩健勇,赵文,关永平,等.地铁车站洞桩法开挖变形规律分析[J].应用力学学报,2015,32(4):623-629.
[2]晏莉.盾构法双管隧道施工引起的地表沉降预测及特征分析[J].隧道建设,2015,35(5):419-427.
[3]李晓娇,欧阳煜.不同土质中隧道埋深对地表沉降的影响[J].佳木斯大学学报(自然科学版),2015,33(2):202-206.
[4]胡学兵,乔玉英.埋深和跨度对隧道结构稳定性影响的数值模拟研究[J].公路隧道,2005(2):5-9.
[5]李倩倩,张顶立,张成平,等.不同埋深下暗挖隧道施工的地层响应[J].北京交通大学学报,2013,37(1):27-33.
[6]马险峰,王俊淞,李削云,等.盾构隧道引起地层损失和地表沉降的离心模型试验研究[J].岩土工程学报,2012,34(5):942-947.
[7]毛峰.黄土隧道深浅埋分界方法研究[D].西安:西安理工大学,2007.
[2]晏莉.盾构法双管隧道施工引起的地表沉降预测及特征分析[J].隧道建设,2015,35(5):419-427.
[3]李晓娇,欧阳煜.不同土质中隧道埋深对地表沉降的影响[J].佳木斯大学学报(自然科学版),2015,33(2):202-206.
[4]胡学兵,乔玉英.埋深和跨度对隧道结构稳定性影响的数值模拟研究[J].公路隧道,2005(2):5-9.
[5]李倩倩,张顶立,张成平,等.不同埋深下暗挖隧道施工的地层响应[J].北京交通大学学报,2013,37(1):27-33.
[6]马险峰,王俊淞,李削云,等.盾构隧道引起地层损失和地表沉降的离心模型试验研究[J].岩土工程学报,2012,34(5):942-947.
[7]毛峰.黄土隧道深浅埋分界方法研究[D].西安:西安理工大学,2007.