振动场与渗流场耦合作用下隧道围岩响应试验研究  

Experimental Study on Response of Tunnel Surrounding Rock Under Coupling Effect of Vibration Field and Seepage Field

作　　者：王春瑶 路平[1] 吴春晓 彭希扬 WANG Chunyao;LU Ping;WU Chunxiao;PENG Xiyang(School of Civil Engineering and Architecture,Hainan University,Haikou 570228,China;Hainan Communications Planning Surveying and Designing Institute,Haikou 570228,China)

机构地区：[1]海南大学土木建筑工程学院,海口570228 [2]海南省交通规划勘察设计研究院,海口570228

出　　处：《铁道建筑》2023年第12期102-106,共5页Railway Engineering

基　　金：国家自然科学基金(51868017);海南省基础与应用基础研究计划高层次人才项目(2019RC079)。

摘　　要：为探究地震灾害下水下公路隧道渗漏演变过程,开展了隧道拱顶渗漏振动台模型试验,对不同地震波类型、峰值加速度和隧道埋深比下砂质围岩漏水漏砂现象及规律进行研究。结果表明:峰值加速度相同、输入地震波不同时土拱形成所需时间不同,漏砂程度不同,但孔隙水压力变化趋势类似;峰值加速度越大,土拱形成所需时间越长,孔隙水压力达到稳定状态所需时间越久;随着拱顶漏砂减弱,围岩内部出现空洞;地震波类型对空洞中心的深度和空洞大小影响显著,地震波峰值加速度越大,空洞越小,但空洞中心的深度几乎没变;地震波类型及峰值加速度对空洞的数量和空洞中心的水平位置基本无影响;隧道埋深比对孔隙水压力影响显著,隧道埋深比越大,漏砂开始减弱的时间越早,越容易在隧道拱顶上方形成多个空洞。In order to explore the leakage evolution process of underwater highway tunnel caused by earthquake disasters,a vibration table model test of tunnel arch leakage was carried out to study the phenomenon and law of water and sand leakage in sandy surrounding rock under different seismic wave types,peak accelerations,and tunnel burial depth ratios.The results show that when the peak acceleration is the same and the input seismic wave is different,the time required for the formation of soil arches varies,the degree of sand leakage varies,but the change trend of pore water pressure is similar.The larger the peak acceleration,the longer it takes for soil arching to form,and the longer it takes for pore water pressure to reach a stable state.With the weakening of the sand leakage in the vault,the cavity appears in the surrounding rock.The type of seismic wave has a significant effect on the center depth and size of the cavity.The higher the peak acceleration of the seismic wave,the smaller the cavity,but the depth of the cavity center remains almost unchanged.The type of seismic wave and peak acceleration have little effect on the number of cavities and the horizontal position of the cavity center.The ratio of tunnel burial depth has a significant effect on pore water pressure.The larger the tunnel burial depth ratio,the earlier the sand leakage begins to weaken,and the easier it is to form multiple cavities above the tunnel arch.

关 键 词：隧道 空洞 模型试验 振动场 渗流场 地震波类型 峰值加速度 埋深比 土拱 

分 类 号：U451.2[建筑科学—桥梁与隧道工程]