Rock and Soil Mechanics ›› 2021, Vol. 42 ›› Issue (6): 1705-1712.doi: 10.16285/j.rsm.2020.1606

• Geotechnical Engineering • Previous Articles     Next Articles

Settlement analysis of large open caisson foundation at construction stage of Changtai Yangtze River Bridge

GUO Ming-wei1, MA Huan1, 2, YANG Zhong-ming3, WANG Bin4, DONG Xue-chao1, 5, WANG Shui-lin1   

  1. 1. State Key Laboratory of Geotechnical Mechanics and Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China; 2. School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan, Anhui 232001, China; 3. Jiangsu Provincial Transportation Engineering Construction Bureau, Nanjing, Jiangsu 210004, China; 4. Central South Exploration & Foundation Engineering Co., Ltd., Wuhan, Hubei 430081, China; 5. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2020-10-29 Revised:2021-03-04 Online:2021-06-11 Published:2021-06-16
  • Supported by:
    This work was supported by the National Natural Science Foundation of China(51674239) and the Scientific and Technological Key Projects in Transportation Industry 2019(2019-MS1-011).

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Abstract: With the increasing size of open caisson foundation in large bridge project in China, the overall settlement of large open caisson foundation is vital to the shape control of high-speed railway bridge. In this paper, by taking the open caisson foundation of long-span and rail-cum-road Changtai Yangtze River Bridge as the engineering background, the overall settlement of the sinking well foundation during the Changtai Yangtze River Bridge construction stage is comprehensively analyzed. In addition, based on the distribution of the stratum and the size of open caisson foundation, the corresponding centrifuge model tests are conducted. According the results of tests, it can be seen that the overall settlement of open caisson foundation can be divided into three stages: slow growth, sharp deformation and leveling off. In addition, the overall settlement calculated by the layered sum method with actual compression modulus of the soil is in good agreement with that of the centrifugal model test and the overall settlement of the open caisson foundation is about 220 mm when the construction stage is finished. This study provides an important reference for the design of open caisson foundation of Changtai Yangtze River Bridge and has referential value to similar open caisson foundation engineering.

Key words: layerwise summation method, compression modulus, centrifuge model test, settlement

CLC Number: 

  • TU445
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