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《Chinese Journal of Geotechnical Engineering》 2018-09
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Application of interception and drainage anti-floating system in treatment of uplift accidents

ZHU Dong-feng;CAO Hong;LUO Guan-yong;PAN Hong;MEI Jin-ling;School of Civil Engineering and Transportation, South China University of Technology;The State Key Laboratory of Subtropical Building Science, South China University of Technology;  
It is very complicated to deal with the uplift accidents of underground structures, because the reconstruction of uplift piles or anchors will damage the wide range of bottom slabs, while draining water blindly to relieve pressure may have a bad impact on the environment. The interception and drainage anti-floating system is a good solution to deal with these uplift accidents. The concept of this system is to intercept and drain water by use of the cutoff wall around the underground structures to form a relatively closed seepage environment and several relief wells on the bottom slab. This system can discharge water automatically with the help of controlling and monitoring equipments. The hydraulic gradient around the relief well decreases dramatically due to the adoption of a large well diameter that offers convenience to the later cleaning and maintenance work, which eliminates the hydraulic condition of well clogging. The relief well consists of several prefabricated non-fines concrete well rings installed by crane, so the construction process is very simple. This system has been successfully applied to the treatment of the uplift accident of an underground garage. The monitoring results show that the flow rate and hydraulic head can be controlled, and the operating cost is low.
【Fund】: 岩土力学与工程国家重点实验室资助课题(Z015013);; 华南理工大学亚热带建筑科学国家重点实验室自主研究课题(2015ZC16);; 广东省省级科技计划项目;; 广东省自然科学基金项目(2018A030313383)
【CateGory Index】: TU943
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