土石分层填方地基强夯加固效果研究  

EXPERIMENTAL STUDY ON DYNAMIC CONSOLIDATION OF SOIL AND ROCK LAYERED FILL FOUNDATION

作　　者：杨元富 眭素刚 陈刚[1] 冉路蔓 梅倩玮 YANG Yuan-fu;SUI Su-gang;CHEN Gang;RAN Lu-man;MEI Qian-wei(Faculty of Land Resources Engineering,KUST,Kunming 650093,China;China Nonferrous Metal Industry Kunming Survey Design Institute Co.,Ltd.,Kunming 650051,China)

机构地区：[1]昆明理工大学国土资源工程学院,昆明650093 [2]中国有色金属工业昆明勘察设计研究院,昆明650051

出　　处：《地质灾害与环境保护》2024年第3期101-107,共7页Journal of Geological Hazards and Environment Preservation

摘　　要：现有的高填方回填工艺多数为土石混合料回填,土石分层回填的研究案例较少。为研究土石分层填方地基的强夯加固效果,采用现场试验结合数值模拟的方法,研究碎石层厚度为1 m、2 m、4 m、4.5 m的填方地基强夯加固效果。结果表明:强夯加固后,土石互层地基岩土体的干密度、含水率、孔隙比、压缩模量、地基承载力均得到了大幅度改善,土石互层地基强夯加固效果可以满足工程设计要求;随着碎石层厚度的增加,土石分层回填地基的强夯加固深度降低;在固定夯击能级、夯锤落距、夯击次数等因素的前提下,碎石层厚度为1 m、2 m、4 m、4.5 m时的强夯加固效果均可以满足工程设计要求,但满足要求的夯击数并无明显的变化规律。Most of the existing high fill backfill processes are earth-rock mixture backfill, and there are few research cases of earth-rock layered backfill. In order to study the dynamic consolidation effect of earth-rock layered fill foundation, field tests and numerical simulation are used to study the dynamic consolidation effect of fill foundation with the thickness of gravel layer of 1 m, 2 m, 4 m and 4.5 m. The results show that: After dynamic consolidation, the dry density, moisture content, pore ratio, compression modulus and foundation bearing capacity of soil-rock interlayer foundation have been greatly improved, and the effect of dynamic consolidation can meet the requirements of engineering design;With the increase of gravel layer thickness, the strengthening depth of dynamic consolidation decreases;Under the premise of fixed tamping energy level, tamping hammer drop distance, tamping times and other factors, the dynamic consolidation effect can meet the engineering design requirements when the gravel layer thickness is 1 m, 2 m, 4 m, 4.5 m, but the number of tamping that meets the requirements has no obvious change law.

关 键 词：土石分层 强夯加固 夯沉量 碎石层厚度 

分 类 号：P642[天文地球—工程地质学] TU753[天文地球—地质矿产勘探] TU472[天文地球—地质学]