某坡地建筑物地下室抗浮失效原因分析及治理措施研究

作者：高晓峰任东兴邓安罗东林

单位：中冶成都勘察研究总院有限公司

摘要：以某坡地建筑物地下室抗浮失效破坏为例，通过对现场施工及周边环境分析得出此坡地建筑地下室抗浮失效的主要原因：一是地下室顶板未及时覆土，导致上部自重荷载不足以抵抗地下室所承受的浮力；二是场地北部道路的修建改变了原有场地的水文地质条件和地下水的排泄条件，使拟建场地大气降水由随地形面排泄为主，转为垂直下渗沿基岩层面排泄为主；三是拟建场地为挖方区，基坑开挖深度10～25m不等，场地四周坡体经开挖后，形成四周高中间低的漏斗形，导致基坑水盆效应突出。针对该地下室抗浮失效问题，提出了及时进行地下室顶板覆土作业、设置排水盲沟及泄压井以及基坑肥槽隔水处理多项治理，成功解决了该项目地下室抗浮失效问题，为类似工程抗浮病害处理及今后抗水板、抗浮设计等提供参考依据。

关键词：坡地建筑，地下水，工程抗浮，治理措施，排水盲沟，泄压井

作者简介：高晓峰，学士，高级工程师，主要从事岩土工程勘察设计工作，Email:gxf95@qq.com。
基金： -页码-：131-137，103

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Study on cause analysis and treatment measure of anti-floating failure in a slope building basement

GAO Xiaofeng REN Dongxing DEN An LUO Donglin

(Chengdu Surveying Geotechnical Research Institute Co.,Ltd.of MCC)

Abstract: Taking the anti-floating failure of a slope building basement as an example, the main reasons for the anti-floating failure in a slope building basement were obtained through the analysis of the site construction and surrounding environment. Firstly, the roof of the basement was not covered with soil in time, resulting in insufficient self-weight load of the upper part to resist the buoyancy of the basement. The second reason is that the construction of the road in the north of the site has changed the hydrogeological conditions of the original site and the discharge conditions of groundwater, so that the discharge channel of atmospheric precipitation at the proposed site was changed from the main discharge on the terrain surface to the main discharge from vertical infiltration along the bedrock layer. Thirdly, the proposed site was an excavation area, and the excavation depth of the foundation pit ranged from 10 to 25 m. After excavation of slope body around the site, the slope around the site forms a funnel-shaped shape with high in the surrounding and low in the middle, resulting in basin effect of foundation pit. Aiming at the problem of anti-floating failure of the basement, various treatment measures that the soil covering operation of the basement roof in time, setting up blind drainage ditches and pressure relief wells, and water-proof treatment of the foundation trench were proposed. The problem of anti-floating failure in the basement of this project was successfully solved, providing a reference for the treatment of anti-floating diseases in similar projects and the design of anti-floating water resistant plate and anti-floating in the future.

Keywords: slope building; underground water; engineering anti-floating; treatment measure; blind drainage ditch; pressure relief well

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