Abstract：According to the correct analysis of the reasons for differential settlement of a high-rise building, the integrated reinforcement technologies and measures of the building are established especially. In order to stop the high settlement and inclination ratio and ensure that the deformation of the building meets the standard requirement, the project takes four measures: (1) to unload and reduce settlement at the one side, and to upload and increase settlement at the other side; (2) to take variable stiffness reinforcement by using concrete-filled steel pipe with post-grouting technology; (3) to add the foundation pressure of small-settlement side with post-cast strip cutting method so as to make the settlement be larger; (4) to arrange a scientific and reasonable sequence of construction to realize the expected results. Finally, the settlement ratio of the building decreases from 0.8 mm/d to 0.006 mm/d; the stable tilt value also decreases from 2.8‰ to 2.28‰, which both satisfy the requirements of the national standard. Problems happened during the process of building implementation of the project are also discussed. The research results and strengthening experience may provide reference for similar projects.
秋仁东, 刘金砺, 邱明兵, 郑文华, 殷瑞, 郭金雪. 某高层建筑事故的加卸载和变刚度桩基综合处理[J]. 岩土工程学报, 2013, 35(zk2): 1081-1086.
QIU Ren-dong, LIU Jin-li, QIU Ming-bing, ZHENG Wen-hua, YIN Rui, GUO Jin-xue. Comprehensive treatment of loading and unloading of pile foundation with variable stiffnesses for a high-rise building accident. Chinese J. Geot. Eng., 2013, 35(zk2): 1081-1086.
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