基坑加深的加固措施及其效果  

Effect and method about reinforcing supports of foundation-pit for deepen excavation

作　　者：吴铭炳[1] 戴一鸣[1] 林颖孜[1] 王文辉[1] 

机构地区：[1]福建省建筑设计研究院,福建福州350001

出　　处：《岩土工程学报》2010年第S2期459-462,共4页Chinese Journal of Geotechnical Engineering

摘　　要：阐述了软土地基某工程由于地下室增加一层,在原基坑支护桩已基本完成施工情况下的加固措施。充分利用已有支护桩,采用后排增加稀疏长桩,满足抗倾覆、抗隆起要求;利用单双排桩的不同刚度产生土拱效应,减少旧桩作用力,满足桩身强度要求;增加内支撑层数等措施,成功完成加层地下室的基坑支护。通过变形和构件应力监测的信息化施工和动态设计,分析支护结构体系和周边环境的安全性,预测发展趋势,确保了基坑支护结构体系的安全,监测成果证明了支护设计所采取的各种技术措施的合理性,本工程取得的经验对于类似工程具有借鉴意义。The reinforcement measurements at the base of original deep excavation are discussed for the increasing of basement,Utilize the existing support piles and increase sparse long pile of the back to meet anti-overturning,uplift resistance requirements;Usage of the different stiffness of single piles producing soil arching effect,reduces the old pile forces to meet the shaft strength requirements;Increase number of layers of the support to complete the additional basement excavation.Through information construction and dynamic design,deformation and stress monitoring analyze the retaining structure and the safety of the surrounding environment,and forecast trends.To ensure the security of retaining structure,monitoring results prove that technical measures for supporting design are reasonable,the experience gained in this project with reference to similar projects.

关 键 词：地下室加层 基坑隆起 基坑监测 

分 类 号：TU753.8[建筑科学—建筑技术科学]