新型防液化抗滑桩研发与地震响应振动台模型试验研究  

Research and development of novel anti-slide pile to prevent liquefaction and shaking table model test of seismic response

作　　者：董建华[1,2,3] 杨博 田文通[1,4] 吴晓磊 何鹏飞 赵律华 连博 DONG Jian-hua;YANG Bo;TIAN Wen-tong;WU Xiao-lei;HE Peng-fei;ZHAO Lü-hua;LIAN Bo(School of Civil Engineering,Lanzhou University of Technology,Lanzhou,Gansu 730050,China;Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province,Lanzhou University of Technology,Lanzhou,Gansu 730050,China;Western Engineering Research Center of Disaster Mitigation in Civil Engineering of Ministry of Education,Lanzhou University of Technology,Lanzhou,Gansu 730050,China;Key Laboratory of Loess Earthquake Engineering,Lanzhou Institute of Seismology,China Earthquake Administration,Lanzhou,Gansu 730000,China)

机构地区：[1]兰州理工大学土木工程学院,甘肃兰州730050 [2]兰州理工大学甘肃省土木工程防灾减灾重点实验室,甘肃兰州730050 [3]兰州理工大学西部土木工程防灾减灾教育部工程研究中心,甘肃兰州730050 [4]中国地震局兰州地震研究所中国地震局(甘肃省)黄土地震工程重点实验室,甘肃兰州730000

出　　处：《岩土力学》2025年第4期1084-1094,共11页Rock and Soil Mechanics

基　　金：国家自然科学基金(No.52178335,No.52438345);水利部重大科技项目(No.SKS-2022166);甘肃省科技重大专项计划(No.24ZDCA010);教育部产学合作协同育人项目(No.22107031081835)。

摘　　要：地震诱发液化滑坡灾害严重,为解决含可液化土层边坡的支护治理问题,基于“防抗结合”的理念,集主动“排水”和被动“抗滑”为一体,提出了一种新型防液化抗滑桩。为检验新型抗滑桩的抗液化效果,基于黄河上游流域含可液化土层边坡的勘察资料,抽象概化含可液化土层的边坡模型,设计开展了新型抗滑桩和普通抗滑桩对比分析的大型振动台模型试验,得出了地震作用下不同类型抗滑桩支护可液化土层边坡的破坏模式和土体超孔压动力响应特性。结果表明:地震作用下,抗滑桩支护含液化土层边坡破坏模式为地震诱发-液化层上覆土层水平甩出-液化土层底部坡面鼓包剪出-抗滑桩前土体流滑堆积;相较普通抗滑桩,新型防液化抗滑桩可快速有效消散桩周土体超孔压,能有效防止桩周土体液化,达到防液化的设计目标。研究结果验证了防液化抗滑桩的可靠性,对减轻地震液化滑坡灾害具有重要参考价值。Liquefied landslide disasters induced by earthquake are serious,in order to solve the problem of support and management of slopes with liquefiable soil layer,a novel anti-slide pile to prevent liquefaction is proposed based on the concept of"combination of prevention and resistance",which integrates active drainage and passive anti-slip.To evaluate the effectiveness of the novel anti-slide pile in preventing liquefaction,a slope model was developed based on survey data from slopes with liquefiable soil layers in the upper Yellow River region.A large-scale shaking table model test was conducted to compare the novel anti-slide pile with conventional ones.The failure mode and dynamic response characteristics of excess pore water pressure in soil of the slope with liquefiable soil layer supported by different types of anti-slide piles under earthquake are obtained.The results indicate that the failure mode of slope with liquefied soil layer supported by anti-slide pile under earthquake is earthquake-induced-horizontal ejection of overlying soil layer on liquefied soil layer-bulging,shearing of slope surface at the bottom of liquefied soil layer-flowing and sliding accumulation of soil in front of anti-slide pile.In comparison to conventional anti-slide piles,the novel anti-slide pile for liquefaction prevention can rapidly and efficiently dissipate excess pore pressure in the surrounding soil.This mechanism effectively prevents liquefaction around the pile,achieving the goal of liquefaction prevention.The research findings confirm the reliability of the novel anti-slide pile for liquefaction prevention,providing valuable insights for mitigating seismic liquefaction landslide disasters.

关 键 词：地震液化滑坡 新型防液化抗滑桩 超孔隙水压力 振动台试验 

分 类 号：TU473[建筑科学—结构工程]