土石坝高聚物防渗墙离心机振动台模型试验研究  

Centrifuge Shaking Table Testing of Earth-rock Dam with Polymer Diaphragm Wall

作　　者：王博[1] 闫林 徐建国[1] WANG Bo;YAN Lin;XU Jianguo(School of Water Conservancy Engineering,Zhengzhou University,Zhengzhou 450000,China;National Quality Supervision and Inspection Center for Metal Products,Zhengzhou 450000,China)

机构地区：[1]郑州大学水利科学与工程学院,河南郑州450000 [2]国家金属制品质量监督检验中心,河南郑州450000

出　　处：《防灾减灾工程学报》2021年第1期1-11,共11页Journal of Disaster Prevention and Mitigation Engineering

基　　金：国家自然科学基金面上项目(52079128);河南省科技攻关项目(182102210013)资助。

摘　　要：为研究高聚物防渗墙的抗震性能,开展了土石坝高聚物防渗墙和混凝土防渗墙离心机振动台模型试验研究。在调幅分别为0.2g和0.4g El-Centro地震波输入条件下,通过对墙体动应力、超孔隙水压力、动土压力、坝体加速度、坝顶沉降等数据的采集分析以及试验后的开挖验证,结果发现:强震下高聚物防渗墙的动应力远小于混凝土防渗墙,与坝体加速度响应较为一致,但对动力的传递作用使得下游坝坡承受较大的水平土压力作用。研究表明高聚物防渗墙具有较好的变形协调性及良好的抗震性能,但选用高聚物防渗墙的土石坝应注意下游坝坡的加固处理。In order to study the seismic response of polymer diaphragm walls,centrifuge shaking table tests of earth-rock dams with polymer and concrete diaphragm walls were carried out.Under the condition of El-Centro seismic wave input with the amplitude modulation of 0.2 g and 0.4 g,the dynamic stress of the wall,excess pore water pressure,dynamic earth pressure,acceleration of the dam body,and settlement at the dam crest were collected,analyzed and verified by excavation.The results show that the dynamic stress of the polymer diaphragm wall under strong earthquake is much smaller than that of the concrete diaphragm wall,and the dynamic response is consistent with the acceleration response of the dam body.However,the transfer of dynamic forces brings more lateral earth pressure on the downstream slope of the dam.The study shows that the polymer diaphragm wall has superior deformation coordination and seismic performance,but for earth-rock dams with polymer diaphragm walls,more attention should be paid to the reinforcement treatment of downstream slopes.

关 键 词：土石坝 高聚物防渗墙 离心机振动台试验 墙体动应力 动力响应 

分 类 号：TV641.2[水利工程—水利水电工程]