[1]王建华,周扬锐.饱和弱化与液化土层的水平极限抗力[J].世界地震工程,2010,(04):037-42.
 WANG Jianhua,ZHOU Yangrui.Ultimate lateral resistances of saturated degraded and liquefied strata[J].,2010,(04):037-42.
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饱和弱化与液化土层的水平极限抗力
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《世界地震工程》[ISSN:/CN:]

卷:
期数:
2010年04期
页码:
037-42
栏目:
出版日期:
2010-04-01

文章信息/Info

Title:
Ultimate lateral resistances of saturated degraded and liquefied strata
作者:
王建华1 周扬锐2
1. 天津大学岩土工程研究所, 天津 300072;
2. 中海油田服务股份有限公司工程勘察中心, 天津 300451
Author(s):
WANG Jianhua1 ZHOU Yangrui2
1. Institute of Geotechnical Engineering, Tianjin University, Tianjin 300072, China;
2. Geotechnique Investigation Center of China Oilfield Services Limited, Tianjin 300451, China
关键词:
桩水平极限抗力液化砂中的桩砂土液化p-y曲线
Keywords:
ultimate lateral resistance of pilespile in liquefied sand soilsand soil liquefactionp-y curves
分类号:
TU411;P315.98
摘要:
通过给饱和砂土层施加反压,模拟地震荷载作用下具有残余孔压的饱和弱化、液化土层.选择粉质细砂与细砂,进行了18组水平荷载作用下桩与饱和弱化、液化土层相互作用的模型试验,研究了饱和弱化、液化土层水平极限抗力随土层残余孔压增加的变化规律.结果表明,随土层中残余孔压增加,水平极限抗力逐渐降低,土层液化后的水平极限抗力大约降低80%~90%.通过定义饱和弱化、液化土层的强度,定量分析了饱和弱化、液化砂土的强度参数与水平极限抗力之间关系.又通过引入土层的残余孔压比折减系数,建立了确定饱和弱化、液化土层等效强度的关系式,进而提出了一种按等效强度确定饱和弱化、液化土层水平极限抗力的方法.
Abstract:
Saturated degraded and liquefied sand soil layers with the residual pore water pressures are simulated under seismic loads by applying backpressures to saturated sand soil.The silty fine sand and the fine sand were chosen and eighteen model tests of interactions of lateral-loaded piles and the saturated degraded or liquefied sand soil layers were conducted for researching variations of ultimate lateral resistances of soil layers with the increase of residual pore water pressures in the sand soil layers.Test results show that ultimate resistances gradually decrease with the increase of residual pore water pressures by 80% to 90% after sand soil liquefaction.The relationship between the resistance and the strength is quantitatively analyzed by defining the strength of the saturated degraded and liquefied sand soil layers.The relationship to determine the equivalent strength of the degraded and liquefied sand soil layers is further established by defining the scale factor of residual pore water pressures.The method is finally developed for determining ultimate lateral resistances of the degraded and liquefied sand soil layers based on equivalent strength parameters.

参考文献/References:

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[2] Liu L,Dobry R.E ffect of liquefaction on lateral response of piles by centrifugem odeltests[R].National Center for Earthquake Engineering Research Bulletin,New York,1995.
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备注/Memo

备注/Memo:
收稿日期:2010-8-20;改回日期:2010-9-21。
基金项目:国家自然科学基金项目(50579050)
作者简介:王建华(1955- ),男,教授,博士生导师,主要从事海洋岩工程与岩土地震工程研究.E-mail:tdwjh@eyou.com
更新日期/Last Update: 1900-01-01