悬臂抗滑桩静、动力学性能试验的全过程  

Full process of static and dynamic performances of cantilever anti-slide pile

作　　者：郑桐[1] 刘红帅[2] 袁晓铭[1] 涂杰文[3] 汤爱平[4] 齐文浩[1] ZHENG Tong 1, LIU Hong-shuai2, YUAN Xiao-ming1, TU Jie-wen3, TANG Ai-ping4, QI Wen-hao1(1. Key Laboratory of Earthquake Engineer and Engineer Vibration, Institute of Engineering Mechanics, Institute of Engineering Mechanics, China Earthquake Administration, Harbin, Heilongjiang 150080, China; 2. Development Research Center of China Earthquake Administration, Beijing 100036, China; 3. Zhejiang Transportation Engineering Construction Group Co. Ltd., Hangzhou, Zhejiang 310013, China; 4. School of Civil Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150090, Chin)

机构地区：[1]中国地震局工程力学研究所中国地震局地震工程与工程振动重点实验室,黑龙江哈尔滨150080 [2]中国地震局发展研究中心,北京100036 [3]浙江省交通工程建设集团有限公司,浙江杭州310013 [4]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090

出　　处：《岩土力学》2018年第3期854-862,共9页Rock and Soil Mechanics

基　　金：国家自然科学基金资助项目(No.41172293)~~

摘　　要：基于悬臂抗滑桩治理堆积型滑坡的静、动力离心模型试验,利用土压力传感器、应变片以及加速度传感器采集到的试验数据,研究了静、动力条件下抗滑桩的受力特性,分析了被治理滑坡的地震响应特征。结果表明:静、动力条件下桩后土压力以及桩身弯矩的分布规律均不同;桩后静土压力大于地震动引起的动土压力,但桩身静弯矩远小于地震动引起的动弯矩;桩后动土压力和动弯矩随峰值地震动的增大而增大;地震作用时土压力和桩身弯矩最大值的作用点低于静力的;滑体加速度响应存在浅表放大效应和高程放大效应,坡肩附近的波型转化现象显著,抗震设计时应予以重视。Based on the static and dynamic centrifugal model test of cantilever anti-slide pile in accumulation landslide, the mechanical characteristics of anti-slide pile and the seismic responses of landslide were analyzed using data from soil-pressure sensors, strain gauge pairs of pile and accelerometers. The results show that the distribution laws of earth pressure on the back of piles and bending moment of pile under static loading and dynamic conditions were different. The static earth pressure of pile back was significantly greater than that induced by earthquake action, but the static bending moment of pile was far smaller than that caused by seismic vibration. The dynamic earth pressure on the back of piles and the bending moment of piles increased with the increase of peak ground motion. The action points of the maximum earth pressure on the back of piles and bending moment of pile were lower under seismic actions than under static condition. There is superficial amplification effect near the crest of landslide and elevation magnifying effect inside the landslide. The phenomenon of wave type transform was significant, to which more attention should be paid in aseismatic design.

关 键 词：悬臂抗滑桩 堆积型滑坡 离心模型试验 土压力 桩身弯矩 加速度响应 全过程分析 

分 类 号：TU473[建筑科学—结构工程]