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作 者:张政昊 罗军尧 ZHANG Zhenghao;LUO Junyao(Faculty of Land and Resources Engineering,Kunming University of Science and Technology,Kunming Yunnan 650031,China;不详)
机构地区:[1]昆明理工大学国土资源工程学院,云南昆明650031 [2]中国电建集团昆明勘测设计研究院有限公司,云南昆明650051
出 处:《工业安全与环保》2024年第5期35-39,共5页Industrial Safety and Environmental Protection
基 金:云南省基础研究计划项目青年专项(202301AU070022)。
摘 要:绝大多数地方和行业编制的基坑设计规范对于悬臂式支挡结构嵌固深度计算的规定几乎相同,但部分地区的基坑规范存在差异性。选取了《建筑基坑支护技术规程》(JGJ 120—2012)、GJB—02—1998《广州地区建筑基坑支护技术规定》、浙江省DB33/T 1096—2014《建筑基坑工程技术规程》3本基坑规范,分析了它们对于悬臂式支挡结构嵌固深度计算规定的差异性,以实际的基坑工程为例进行嵌固深度计算,并利用有限元数值模拟软件MIDAS GTS NX对计算结果进行数值模拟,比较这些不同之处对嵌固深度的影响。结果表明:采用不同规范进行基坑悬臂式支挡结构设计时,支护结构的嵌固深度差异可达数米。这种差异性受土体性质、基坑深度影响较大,对基坑工程经济性造成的影响不可忽视。The majority of locally and industry-developed foundation pit design codes have almost identical provisions for calculating the embedded depth of cantilever retaining structures.However,there exist notable differences in the foundation pit codes across various regions.We selected three foundation pit specifications,namely,"Technical Specification for Building Foundation Pit Support"(JGJ 120-2012),"Technical Specification for Building Foundation Pit Support in Guangzhou Region"(GJB-02-1998),and"Technical Specification for Building Foundation Pit Engineering"(DB 33/T 1096-2014)in Zhejiang Province.We analyzed the disparities in the calculation of the embedded depth for cantilever retaining structures across these three specifications.Using actual foundation pit engineering as a case study,we calculated the embedded depth.Furthermore,we utilized the finite element numerical simulation software MIDAS GTS NX to numerically simulate the calculation results and compare the impact of these differences on the embedding depth.The results indicate that when using different specifications for the design of cantilever retaining structures in foundation pits,the variance in the embedding depth of the retaining structure can reach several meters.This significant difference is primarily influenced by the soil properties and the depth of the foundation pit,which cannot be overlooked in terms of its impact on the economic feasibility of foundation pit engineering.
关 键 词:基坑规范 基坑工程 支护结构 嵌固深度 MIDAS GTS NX
分 类 号:TU753[建筑科学—建筑技术科学]
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