地震-降雨耦合作用下岩土边坡的失稳机制振动台试验数据集

基于典型的高陡边坡工点，自行研发降雨装置，开展了地震-降雨耦合作用下高陡边坡失稳机制研究的振动台试验。试验选择El-Centro波和汶川地震清屏波作为地震激励，考虑从纵向、横向输入地震动加速度，峰值地震动加速度依次采用0.05g、0.1g、0.2g、0.4g、0.5g、0.7g以及0.9g，降雨强度依据国家降雨强度等级采用了高、中、低三种强度的降雨模式。获取地震-降雨耦合作用中边坡的加速度、位移、土压力及孔隙水压力等数据，对边坡失稳机制进行分析：①对振动台试验地震激励过程中采集数据进行分析，结合HHT方法，对边坡损伤进行识别，揭示震前降雨边坡失稳机制；②对降雨后引起的边坡竖向应力、孔隙水压力、位移变化进行分析，揭示震后降雨边坡失稳机制。A series of shaking table tests were conducted to investigate the instability mechanism of steep and high slopes under seismic-rainfall coupling effects, based on typical steep and high slope engineering sites, with a self-developed rainfall device. For the tests, El-Centro wave and Qingping wave from the Wenchuan earthquake were selected as seismic excitations. Seismic ground acceleration was input in both longitudinal and transverse directions, with the peak ground acceleration (PGA) set sequentially as 0.05g, 0.1g, 0.2g, 0.4g, 0.5g, 0.7g, and 0.9g. Three rainfall intensity modes (high, medium, and low) were adopted based on the national rainfall intensity grading standards. Data including slope acceleration, displacement, earth pressure, and pore water pressure under seismic-rainfall coupling conditions were collected to analyze the slope instability mechanism: ① Analyze the data collected during the seismic excitation process of the shaking table tests, combine with the Hilbert-Huang Transform (HHT) method to identify slope damage, and reveal the instability mechanism of slopes subjected to rainfall prior to earthquakes; ② Analyze the changes in slope vertical stress, pore water pressure, and displacement caused by post-earthquake rainfall, and reveal the instability mechanism of slopes subjected to post-earthquake rainfall.

搜集汇总

背景与挑战

背景概述

该数据集针对高陡边坡，通过振动台试验模拟地震与降雨耦合作用，采集了加速度、位移等数据以分析失稳机制。试验使用不同地震波和降雨强度，旨在揭示震前和震后降雨对边坡稳定性的影响。