抗滑桩支护层状软岩边坡地震动力响应分析
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- 英文论文题名：Response analysis on earthquake motive power of frame anchor structure supporting stratiform side slope
- 论文作者：刘洋 ; 杜逢彬 ; 黄勋
- 英文论文作者：Liu Yang ; Du Fengbin ; Huang Xun ; Chongqing Survey Institute ; Chongqing Engineering Research of Geotechnical Engineering
- 年：2016
- 作者机构：重庆市勘测院;重庆市岩土工程技术研究中心;
- 论文关键词：层状软岩边坡 ; 抗滑桩 ; 地震 ; 抗震机理
- 英文论文关键词：stratiform side slope ; anchor structure ; earthquake ; anti-seismic machanism
- 会议召开时间：2016-09-05
- 会议录名称：2016年全国工程勘察学术大会论文集（上册）
- 英文会议录名称：Geotechnical Investigation & Surveying
- 语种：中文
- 分类号：TU473.1;TU435
- 学会代码：ZJKC
- 会议名称：2016年全国工程勘察学术大会
- 会议地点：中国山西太原
- 主办单位：全国建筑工程勘察科技情报网、全国建筑工程勘察科技情报网华北情报站、中国建筑学会工程勘察分会
- 学会名称：中国建筑学会工程勘察分会
- 页数：10
- 文件大小：2536k
- 原文格式：O
- 会议级别：全国
摘要
层状软岩边坡由于层面的强度较低,层面的控制性作用较大,不同类型的层状边坡在地震作用下响应规律亦不同,抗滑桩对其进行加固时,抗震机理亦不同。本文采用FLAC~(3D)节理化本构模型,通过分析不同弱面方向与桩间距交叉组合下桩间岩体监测点的位移值,研究了抗滑桩加固不同类型层状软岩边坡的抗震机理,结果表明:水平地震作用下,抗滑桩对中倾外和陡倾内的层状软岩边坡抗震效果较差,桩间岩体水平位移较大;地震作用下,桩间距为6m、8m时,抗滑桩加固各类型的层状软岩边坡的桩间岩体水平位移大致相同,但桩间距为10m时,桩间岩体的位移明显增大,且中倾外和陡倾内的边坡位移等值线呈较陡型,说明地震作用下存在一临界桩间距L_(cr)。
Due to the strength of the stratiform side slope's level is low and levels controlling effect is bigger.Different types of stratiform side slope under earthquake effect rule of response is different.The anti-slide pile reinforcement,seismic mechanism is different.Based on the FLAC3 D joint constitutive model.Through the analysis of different weak plane direction and the pile spacing cross combination between the points of monitoring the pile rock mass displacement value,the various types of layered anti-slide pile reinforcing soft rock slope seismic mechanism,The results show that the horizontal earthquake effect,to pour pile in outside and steep dip in stratiform side slope anti-seismic effect is poorer and between the pile of the rock mass horizontal displacement is bigger;Under the earthquake,when pile spacing at 6 m and 8 m,anti-slide pile's reinforcing at various types of stratiform side slope that between the pile of the rock mass horizontal displacement is roughly same,but pile spacing for 10 m,piles of rock mass displacement increased obviously,and pour in outside and inside the steep dip slope displacement contour present a steep type.Thus explain that under the action of the earthquake exists a velocity boundary spacing Lcr.
Due to the strength of the stratiform side slope's level is low and levels controlling effect is bigger.Different types of stratiform side slope under earthquake effect rule of response is different.The anti-slide pile reinforcement,seismic mechanism is different.Based on the FLAC3 D joint constitutive model.Through the analysis of different weak plane direction and the pile spacing cross combination between the points of monitoring the pile rock mass displacement value,the various types of layered anti-slide pile reinforcing soft rock slope seismic mechanism,The results show that the horizontal earthquake effect,to pour pile in outside and steep dip in stratiform side slope anti-seismic effect is poorer and between the pile of the rock mass horizontal displacement is bigger;Under the earthquake,when pile spacing at 6 m and 8 m,anti-slide pile's reinforcing at various types of stratiform side slope that between the pile of the rock mass horizontal displacement is roughly same,but pile spacing for 10 m,piles of rock mass displacement increased obviously,and pour in outside and inside the steep dip slope displacement contour present a steep type.Thus explain that under the action of the earthquake exists a velocity boundary spacing Lcr.
引文
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[2]叶海林,郑颖人,黄润秋等.强度折减动力分析法在滑坡抗滑桩抗震设计中的应用研究[J].岩土力学,2010(增刊1):66-73
[3]罗渝,何思明,何尽川.地震作用下抗滑桩作用机制研究[J].长江科学院院报,2010,27(6):26-29.
[4]吕涛.抗滑桩的土拱效应及数值模拟[J].人民长江,2007,38(1):42-45.
[5]吕庆等.抗滑桩桩后土拱效应的作用机理及发育规律[J].水利学报,2010,41(4):471-476.