Abstract：A simplified approach for predicting settlement of the adjacent buildings due to excavation is proposed. The settlement of building foundation can be obtained merely according to the basic information of the excavation. Compared with the previous approaches, this approach considers the foundation stiffness and avoids complex numerical modelling. Based on distribution pattern of ground surface settlement, the reduction rules of deep soil settlement is analyzed, and the settlement distribution curve of deep soils is obtained. According to the partition characteristics of excavation environmental impact, the settlement distribution curve above the excavation face is suggested. Since the stiffness of building foundation and ground stabilization is far greater than that of the surrounding soils, and the settlement of buildings mainly results from soil deformation under the building foundation. Therefore, the settlement of soils under the building foundation can be taken as that of the buildings, which can be represented by the settlement curve of deep soils. The comparison between the monitoring data and the calculated results obtained by the simplified approach is in good agreement, which indicates the simplified approach can be employed to predict the settlement of buildings induced by excavation.
范凡, 陈锦剑, 章红兵, 王建华. 基坑开挖引起紧邻建筑物沉降的简化计算方法[J]. 岩土工程学报, 2015, 37(zk2): 61-64.
FAN Fan, CHEN Jin-jian, ZHANG Hong-bing, WANG Jian-hua. Simplified method to predict settlements of adjacent buildings due to deep excavation. Chinese J. Geot. Eng., 2015, 37(zk2): 61-64.
[1] PECK R B. Deep excavation and tunneling in soft ground[C]// Proceedings of the 7th International Conference on Soil Mechanics and Foundation Engineering. Mexico City, 1969: 225-290. [2] 丁勇春. 软土地区深基坑施工引起的变形及控制研究 [D]. 上海:上海交通大学, 2009. (DING Yong-chun. Excavation- induced deformation and control in soft deposits [D]. Shanghai: Shanghai Jiao Tong University, 2009. (in Chinese)) [3] WANG J H, XU Z H, WANG W D. Wall and ground movements due to deep excavations in Shanghai soft soils[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2009, 136(7): 985-994. [4] CLOUGH G W, O’ROURKE T D. Construction induced movements of in site walls[C]// ASCE Conference on Design and Performance of Earth Retaining Structures. New York, 1990: 439-470. [5] OU C Y, LIAO J T, LIN H D. Performance of diaphragm wall constructed using top-down method[J]. Journal of Geotechnical and Geoenvironmental Engineering, 1998, 124(9): 798-808. [6] 刁伟轶. 钻孔咬合桩受力变形规律及在地铁车站设计施工中的应用研究 [D]. 上海: 同济大学, 2006. (DIAO Wei-yi. Research on the principle and design of borehole cast-in-place pile and the construction in deep excavation next to metro station[D]. Shanghai: Tongji University, 2006. (in Chinese)) [7] 田 军. 地铁车站深基坑半逆作法施工的环境变形控制分析[J]. 上海交通大学学报, 2012(6): 30. (TIAN Jun. Environment deformation caused by semi-top-down excavation of metro station[J]. Journal of Shanghai Jiao Tong University, 2012(6): 30. (in Chinese))
