摘要
为了研究土岩组合地层基坑开挖性状和受力性能与其他地质条件的差异,采用现场实测和Rankine理论分析的方法对金华地区土岩组合地质条件下万达广场地铁深基坑的土压力、深层土体位移等进行分析。研究结果表明:当开挖在见岩面以上土层时,主动土压力分布模式为三角形,基坑开挖面以下的影响深度约为0.93~1.1倍的开挖深度(H);当开挖到见岩面以下岩石层时,主动土压力由三角形分布演变为R形分布,基坑开挖面以下的影响深度约为0.58~0.67 H;在见岩面以上,围护结构上主动土压力的实测值与理论值的比值约为0.81;在见岩面以下,实测值与理论值相差较大,两者比值约为0.48。研究结果可为土岩组合地质条件下类似工程的设计、施工和监测等提供参考。
In order to explore the differences of foundation pit excavation properties and mechanical performance between the soil-rock combination stratum and other geological conditions,the methods of field measurement and Rankine theoretical analysis were used to analyze the soil pressure and deep soil displacement of deep foundation pit of subway under the geological conditions of soil-rock combination in Wanda Plaza,Jinhua area.The research results show that when excavating in the soil layer above the rock surface,the active earth pressure distribution pattern is triangular,and the influence depth below the excavation surface of the foundation pit is about 0.93~1.1 times H(H is the excavation depth);when excavating in the rock layer below the rock surface,active earth pressure evolves from triangular distribution to R-shaped distribution,and the influence depth below the excavation surface of the foundation pit is about 0.58~0.67 times H;above the rock face,the ratio of the measured value to the theoretical value is about 0.81;below the rock face,the ratio is about 0.48,indicating the great difference between the measured value and the theoretical value.The research results can provide a reference for the design,construction and monitoring of similar projects under the geological conditions of of soil-rock combination.
作者
寿凌超
王立峰
王珂
韦康
SHOU Lingchao;WANG Lifeng;WANG Ke;WEI Kang(School of Civil Engineering and Architecture,Zhejiang University of Science and Technology,Hangzhou 310023,Zhejiang,China)
出处
《浙江科技学院学报》
CAS
2021年第3期248-253,260,共7页
Journal of Zhejiang University of Science and Technology
基金
浙江省金华市科技局计划项目(0401104I17)。
关键词
土岩组合地层
土压力
基坑
土体位移
soil-rock combination stratum
earth pressure
foundation pit
soil displacement
