基于HHT的两种桩板墙抗震效果对比分析  

Comparative Analysis on Seismic Performance of Two Representative Sheet Pile Walls Based on HHT

作　　者：曲宏略[1] 朱梦佳 张哲 陈爽 王西科 邓媛媛 QU Honglue;ZHU Mengjia;ZHANG Zhe;CHEN Shuang;WANG Xike;DENG Yuanyuan(School of Geoscience and Technology,Southwest Petroleum University,Chengdu 610500,China;Yunnan Infrastructure Investment Co Ltd,Kunming 650217,China;Tianjin Water Conservancy Surveying and Designing Institute Co Ltd,Tianjin 300202,China)

机构地区：[1]西南石油大学地球科学与技术学院,四川成都610500 [2]云南建设基础设施投资股份有限公司,云南昆明650217 [3]天津市水务规划勘测设计有限公司,天津300202

出　　处：《土木工程与管理学报》2023年第5期47-54,共8页Journal of Civil Engineering and Management

基　　金：科技部重点研发计划(2018YFE0207100);四川省自然科学基金面上项目(23NSFSC2191)。

摘　　要：桩板墙具备优良的抗震性能,但目前对其研究多集中于静力方面,关于支护边坡内部震害损伤动态发展的研究较少,关于两类典型桩板墙震害损伤过程的对比研究更罕见报道。基于此,本文通过振动台试验,利用Hilbert-Huang Transform法,对比分析了锚索桩板墙、桩板墙加固边坡的频谱特性。结果表明:最易产生损伤的位置均为滑面处,但在研究对象中,由于锚索的存在,震害没有延伸至坡体;致使桩板墙加固边坡开始产生震害损伤的PGA较锚索桩板墙小,且远离桩板墙侧的土体先出现破坏;锚索的存在,改变了结构受力状态,使土-抗滑桩-锚索成为整体,减弱了锚索周围土体的震害损伤;当PGA较大时,锚索桩板墙有效抑制坡体震害损伤,更好地保持边坡的稳定性,相比桩板墙表现出更为良好的抗震性能。The sheet pile wall has excellent seismic performance,but the current research mostly focuses on the static aspect.There are few studies on the dynamic development of internal seismic damage the supporting slope,and the comparative study on the seismic damage process of two typical sheet pile walls is rarely.Based on this,this paper uses Hilbert-Huang Transform method to compare and analyze the spectral characteristics of the slope reinforced by the anchored sheet pile wall and the pile wall by shaking table test.The results show that the most prone to damage locations are slip surface,but in the study,due to the presence of anchor cables,the damage does not extend to the slope;the seismic damage PGA of the sheet pile wass reinforced slope is smaller than that of anchored sheet pile wall,and the soil far away from the sheet pile wall is damaged first.The existence of the anchor cable changes the stress state of the structure,makes the soil-antislide pile-anchor cable as a whole,and weakens the seismic damage of the soil around the anchor cable.When the PGA is large,the anchored sheet pile wall can effectively suppress the seismic damage of the slope and better maintain the stability of the slope.Compared with the sheet pile wall,it shows better seismic performance.

关 键 词：HHT 振动台试验 锚索桩板墙 桩板墙 

分 类 号：U418.52[交通运输工程—道路与铁道工程]