建筑机械荷载对开挖稳定性影响的离心试验.pdf

第 14卷 第 1 期 铁道科学与工程学报 Volume 14 Number 1 2017年 1 月 Journal of Railway Science and Engineering January 2017 建筑机械荷载对开挖稳定性影响的 离心试验 房明、杨俊杰2 (1.广东财经大学公共管理学院，广 东 广 州 510320; 2.中国海洋大学环境科学与工程学院，山 东 青 岛 266003) 摘要:在建筑机械开挖市政管线的沟槽过程中，由于沟槽沟壁滑坡、塌方，挖掘机倾翻，造成人员伤亡和经济损失的工程 事故日益增多。如何预防此类施工坍塌事故是岩土工程领域亟待研究的课题。通过在砂土和火山灰地基土中分别开展模 拟沟槽开挖过程的离心模型试验，讨论建筑机械荷栽的大小以及与沟壁的距离等因素对沟槽开挖深度滑动土体密度及沟 槽边坡破坏形态的影响。通过研究，可为沟槽等土方开挖安全施工及灾害防御提供重要支撑。 关键词：建筑机械开挖沟槽稳定性离心模型试验 中图分类号:TU443 文献标志码 ：A 文 章编号= 1672-7029 (2017) 01-0167-06 Centrifugal model test on stability of excavation by construction machinery F A N G M in g 1, Y A N G J u n jie 2 (1 . College of Public Adm inistration, Guangdong University of Finance Economics, Guangzhou 510320, C hina ； 2. College of Environmental Science and Engineering , Ocean University of China, Qingdao 266100, China) A b s tra c t ： In the process of excavating pipelines of m u n icip al works by construction m a ch in e ry , trench w a ll slum ­ ping and excavating m achine leaning w ill m ake engineering accidents w hich lead to casualties and econom ic los ­ ses increase . How to avoid slum ping accidents due to execution is a project w hich desiderates research . T his pa ­ per discusses the im paction on excavating d e p th , fa ilu re m echanism and fa ilu re shape w ith these fa cto rs , such as construction m achinery load and the distance between this load and trench w a ll and so o n , by centrifuge model tests w hich sim ulate the process of trench excavation . T his study w ill also provide im portant support to the security construction and disast