论文部分内容阅读
为了探讨土石比及大粒径块石对碎块石土强夯加固效果的影响规律,对3组不同土石比条件下碎块石土强夯地基的瑞利波检测数据进行了对比分析。夯后波速曲线具有明显的突变性,并随着土石比的减小其突变程度增强,突变段与大粒径块石有较好的对应性。波速增加比例曲线具有垂直分区特征,土石比对强夯加固区厚度影响较大。大块石对周边土体存在较强的扰动作用,夯后波速曲线往往表现为突然锐减,特别是当其位于夯后场地表层或较多大块石距离较近时表现更加明显。当大块石位于强加密区内时,加固深度随着大块石埋深增加而减小,且其埋深越靠近波速增加峰值点时加固深度越浅。研究成果对碎块石填土强夯地基的设计和施工具有参考价值。
In order to investigate the influence law of earth-rock ratio and large-size block rock on the dynamic compaction effect of broken rock and soil, the Rayleigh wave detection data of ground compaction of rock and soil under different soil-rock ratio conditions were contrasted and analyzed. The velocity curve after ramification has obvious abrupt change, and the degree of mutation increases with the decrease of soil-rock ratio. The abrupt section has a good correspondence with the large-size block rock. The wave velocity increasing proportion curve has the characteristics of vertical zoning, and the ratio of soil to rock has a great influence on the thickness of the dynamic compaction reinforcement zone. Large stones have strong disturbing effect on the surrounding soil. The wave velocity curve after the rammer often shows a sudden drop, especially when it is located at the surface of the rammer or more stones with relatively short distances. When the massive rock is located in the strong encryption zone, the depth of reinforcement decreases with the increase of the buried depth of the massive rock, and the depth of reinforcement is shallower when the depth of the buried rock is closer to the peak point where the wave velocity increases. The research results have reference value for the design and construction of rammed ground filled with rock fragments.