抛石挤淤法对水草地粉土地基的加固形态研究  

Study on the Reinforcement Morphology of Sedimentary Soil Foundation by Rock-throwing Squeezing and Dredging Method

作　　者：谭家科 连小良 王春辉 耿永红 张蕾[5] 钟华 TAN Jiake;LIAN Xiaoliang;WANG Chunhui;GENG Yonghong;ZHANG Lei;ZHONG Hua(Guangxi Road and Bridge Engineering Group Co.,Ltd.,Guangxi Nanning 530200,China;China Minmetals 23rd Metallurgical Construction Co.,Ltd.,Hunan Changsha 410014,China;Qinghai Province Communication Planning and Design Institute Co.,Ltd.,QinghaiXining 810000,China;Yunnan Open University,Yunnan Kunming 650000,China;Faculty of Architectural Engineering,Kunming University of Science and Technology,Yunnan Kunming 650050,China)

机构地区：[1]广西路桥工程集团公司,广西南宁530200 [2]五矿二十三冶建设集团有限公司,湖南长沙410014 [3]青海省交通规划设计研究院有限公司,青海西宁81000 [4]云南开放大学,云南昆明650000 [5]昆明理工大学建筑工程学院,云南昆明650050

出　　处：《防灾减灾学报》2024年第3期38-44,58,共8页Journal of Disaster Prevention And Reduction

摘　　要：基于极限平衡理论,通过抛石挤淤法对青海湖水草地粉土地基时的加固形态及路基沉降变形规律进行了研究。分析讨论了在抛石挤淤法的作用下,粉土地基的出淤高度、入淤深度及所需的抛石总厚之间的关系,据此判断抛石挤淤法对水草地粉土地基的加固效果。运用有限元软件,分析在抛石挤淤法作用下的粉土路基沉降变形规律,对数值模拟计算得到的路面沉降变形与根据极限平衡理论计算的理论沉降值进行对比分析,将各级荷载作用的数值模拟路面沉降变形值进行归一化及数学拟合处理,提出了一个可以用于初步推算水草地粉土地基在不同厚度抛石作用下的路面沉降经验公式。In this paper,the ultimate balance analysis theory is used to study the reinforcement morphology and the settlement deformation law of the subgrade when the rock-throwing extrusion dredging method is applied to the silt foundation of the aquatic grassland in Qinghai Lake.This analysis discusses the relation⁃ship between the dredging height,the depth of dredging and the total thickness of the required stone throw⁃ing under the action of the rock-throwing squeezing method,and the reinforcement effect of the rock-throw⁃ing squeezing method on the water-grass polished soil foundation can be judged.Using finite element soft⁃ware,the settlement deformation law of the silt subgrade under the action of rock throwing extrusion method is analyzed.The settlement deformation of the pavement calculated by numerical simulation is compared with the theoretical settlement value calculated according to the limit equilibrium theory,The numerical simulated road settlement deformation value of the load action at all levels is normalized and mathematically fitted,and a formula that can be used to initially calculate the empirical formula of road surface settlement of the water and grassland powder soil foundation under the action of different thicknesses of stone throwing is proposed.

关 键 词：水草地 抛石挤淤法 极限平衡分析法 挤淤形态 地基加固 

分 类 号：TU47[建筑科学—结构工程]