摘要
为了对隧道开挖面失稳坍塌而引发土体大变形的工况进行研究,本文提出了一种基于SPH方法的隧道开挖面坍塌模型。SPH方法是一种拉格朗日无网格方法,在该理论中粒子携带质量、密度和应力张量等场变量,并随物质速度移动。结合室内铝棒试验,将模拟结果与试验结果进行对比分析,验证了提出模型的适用性与准确性。针对不同覆土深度和不同地质条件下隧道开挖面失稳坍塌的工况,本文进行不同覆土深度和不同摩擦角的SPH模拟。结果表明:在相同地质条件下,当隧道覆土深度越大,发生隧道开挖面坍塌时,受到扰动而发生土体大变形的土体范围则会越大;在相同的覆土深度下,当土体的摩擦角越大时,发生土体大变形的土体范围和倒灌入隧道的土体体积越小。
To study the large-scale deformation of the soil caused by the collapse of the tunnel excavation surface, this paper proposed a tunnel excavation surface collapse model based on the SPH method. Combined with the indoor aluminum-bar experiment, the simulation results are compared with the experiment results to verify the applicability and accuracy of the proposed model. In view of the collapse of tunnel excavation surface under different covering depths and different geological conditions, this paper carried out SPH simulations with different covering depths and different friction angles. The results show that under the same geological conditions, the greater the depth of the covering soil, the wider the range of the soil that undergoes large-scale deformation due to disturbance;the larger the friction angle of soil,the smaller the range of the soil that undergoes large-scale deformation and the volume of the soil poured into the tunnel under the same soil depth.
作者
龚礼岳
刘海涛
吴则祥
魏良针
刘秀娟
GONG Liyue;LIU Haitao;WU Zexiang;WEI Liangzhen;LIU Xiujuan(Wenzhou Mass Transit Railway Investment Group Co.,Ltd.,Wenzhou 325000,China;Collage of Architecture and Civil Engineering,Wenzhou University,Wenzhou 325035,China)
出处
《建筑结构》
CSCD
北大核心
2021年第S02期1713-1718,共6页
Building Structure
基金
国家自然科学基金青年基金项目(51808407)
温州市基础性软科学研究项目(R2020013)
关键词
隧道开挖面
坍塌
SPH
开挖面稳定性
土体大变形
tunnel excavation face
collapse
SPH
stability of the excavation face
large-scale soil deformation
作者简介
龚礼岳,学士,高级工程师,Email:5329363484@qq.com;通信作者:魏良针,学士,高级工程师,Email:292419191@qq.com。
