上海中山医院基坑逆作法施工时间效应分析

发布时间：2018-04-22 15:34

本文选题：基坑 + 逆作法　；参考：《岩土力学》2014年S2期

【摘要】：软土具有流变性,因此,分析基坑开挖时需要考虑时间效应。逆作法施工时,由于出土条件和结构施工条件的限制,导致施工周期延长,因此,基坑施工的时间效应尤为显著。以上海中山医院工程为例,考虑软土流变效应,建立有限元模型对逆作法基坑的施工过程进行模拟,分析了施工期间各工况的围护和土体的内力与变形性状,并与实测结果进行了对比分析。结果表明,考虑土体流变的分析方法能较好的模拟逆作法施工的时间效应,并合理地反映基坑开挖过程对围护以及周边环境的影响。逆作法基坑施工过程复杂,开挖周期相对较长,应合理安排施工流程和施工速度,以达到控制围护结构及土体变形、保护周边环境的目的。
[Abstract]:Soft soil is rheological, so time effect should be taken into account when analyzing excavation of foundation pit. Because of the limitation of unearthed condition and structural construction condition, the construction period is prolonged, so the time effect of foundation pit construction is especially remarkable. Taking the project of Zhongshan Hospital in Shanghai as an example, considering the rheological effect of soft soil, a finite element model is established to simulate the construction process of the foundation pit with the inverse method, and the internal force and deformation behavior of the enclosure and soil under various working conditions during construction are analyzed. The results are compared with the measured results. The results show that the analysis method considering soil rheology can well simulate the time effect of reverse construction and reasonably reflect the influence of excavation process on the enclosure and surrounding environment. In order to control the deformation of the surrounding structure and soil mass and protect the surrounding environment, the construction process and the construction speed should be reasonably arranged in order to control the complex construction process and the relatively long excavation period.
【作者单位】：现代设计集团上海申元岩土工程有限公司;
【分类号】：TU753

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