地震-降雨耦合作用下岩土边坡的失稳机制数值模拟测试数据集

数据内容为基于温度梯度控制的干湿循环一次、多次作用下路基边坡黏性土强度试验数据；基于湿度梯度控制的干湿循环一次、多次作用下路基边坡黏性土强度试验数据。鉴于土样无法从国外带回国，此次试验所用土体主要是根据雅万高铁现场实测土体参数进行重塑的土体；将重塑土样自然风干，用橡皮锤捶碎，配制成最优含水率的土样，密封放置48 h以上使水分分布均匀。养护完成后，采用降雨法将土样缓缓倒入前述木质模型箱内，并分层竖向压实，制备干湿循环试样。基于温度梯度控制的干湿循环作用下岩土体材料的性能演化试验。对所制备黏土进行不同温度下的干湿循环作用，在每次干燥路径中对样品进行直接剪切测试。通过直剪试验得到相应的剪切强度曲线以及与干湿循环周期之间的关系曲线，从而探讨不同干密度、含水率和循环周期对粉质黏土变形及强度特性的影响。利用上述土体，开展五次循环试验，测点土体的含水率、内摩擦角、粘聚力及土体表面开裂情况随干湿循环测试的演化规律；The dataset consists of test data on the strength of cohesive soils from subgrade slopes under single and multiple drying-wetting cycles controlled by temperature gradient and humidity gradient respectively. Since undisturbed soil samples cannot be brought back from abroad, the soil used in this test is mainly remolded soil prepared based on the in-situ measured soil parameters of the Jakarta-Bandung High-Speed Railway. The remolded soil samples were naturally air-dried, crushed with a rubber mallet, and prepared into soil samples with optimal moisture content, then sealed and left for more than 48 hours to ensure uniform moisture distribution. After curing, the soil samples were slowly poured into the aforementioned wooden model box via the rainfall method, and compacted layer by layer in the vertical direction to prepare drying-wetting cycle test specimens. Performance evolution tests of geotechnical materials under drying-wetting cycles controlled by temperature gradient were conducted. The prepared clay specimens were subjected to drying-wetting cycles at different temperatures, and direct shear tests were performed on the samples during each drying path. Corresponding shear strength curves and their relationship with drying-wetting cycle numbers were obtained through direct shear tests, so as to explore the effects of different dry densities, moisture contents and cycle periods on the deformation and strength characteristics of silty clay. Using the aforementioned soil, five-cycle tests were carried out to measure the evolution laws of soil moisture content, angle of internal friction, cohesion and surface cracking conditions of the soil during drying-wetting cycles.

搜集汇总

背景与挑战

背景概述

该数据集聚焦于地震与降雨耦合作用下岩土边坡的失稳机制，提供了基于温度和湿度梯度控制的干湿循环试验数据。数据内容包括重塑黏性土在不同干湿循环周期下的强度试验结果，如剪切强度曲线、含水率、内摩擦角和粘聚力等参数，旨在分析干密度、含水率和循环周期对粉质黏土变形及强度特性的影响。