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Study on Calculation Method of Jacking Force for Circular Curve Pipe Jacking Considering Pipe-Soil Contact State
Utilizing data from the Gongbei Tunnel's curved steel pipe section within the Hong Kong–Zhuhai–Macao Bridge, the accuracy of jacking force calculation methods in circular curve pipe jacking was examined. Then, an ABAQUS-based finite element model considering the grouting effect and the pipe-soil contact range is established, and the calculation of the jacking force is carried out. Upon comparing the results with measured jacking force data, it is evident that the JMTA formula, Shanghai code formula, and Shimada formula exhibit a descending order of accuracy in calculating jacking force values. Notably, the lower limit calculation value of the Shimada formula, which accounts for 1/3 pipe-soil contact surface, closely approximates the measured value. Numerical simulations reveal that a 1/3 contact state simulates the jacking force, gradually approaching the 1/2 contact state. In the grouting state, the measured jacking force aligns closely with the 1/2 contact state in the early stages of simulating the jacking force; conversely, during later stages when jacking stabilizes, the measured jacking force more closely resembles the 1/3 contact state. Consequently, the predicted jacking force of the numerical model considering the pipe-soil contact state is closer to the actual jacking force, which can provide a valuable guidance for the calculation of jacking force under similar working conditions.
Study on Calculation Method of Jacking Force for Circular Curve Pipe Jacking Considering Pipe-Soil Contact State
Utilizing data from the Gongbei Tunnel's curved steel pipe section within the Hong Kong–Zhuhai–Macao Bridge, the accuracy of jacking force calculation methods in circular curve pipe jacking was examined. Then, an ABAQUS-based finite element model considering the grouting effect and the pipe-soil contact range is established, and the calculation of the jacking force is carried out. Upon comparing the results with measured jacking force data, it is evident that the JMTA formula, Shanghai code formula, and Shimada formula exhibit a descending order of accuracy in calculating jacking force values. Notably, the lower limit calculation value of the Shimada formula, which accounts for 1/3 pipe-soil contact surface, closely approximates the measured value. Numerical simulations reveal that a 1/3 contact state simulates the jacking force, gradually approaching the 1/2 contact state. In the grouting state, the measured jacking force aligns closely with the 1/2 contact state in the early stages of simulating the jacking force; conversely, during later stages when jacking stabilizes, the measured jacking force more closely resembles the 1/3 contact state. Consequently, the predicted jacking force of the numerical model considering the pipe-soil contact state is closer to the actual jacking force, which can provide a valuable guidance for the calculation of jacking force under similar working conditions.
Study on Calculation Method of Jacking Force for Circular Curve Pipe Jacking Considering Pipe-Soil Contact State
Indian Geotech J
Pei, Chao (author) / Shi, Bingjian (author) / Peng, Yonghui (author) / Niu, Jiatong (author) / Liu, Ying (author)
Indian Geotechnical Journal ; 54 ; 1392-1405
2024-08-01
14 pages
Article (Journal)
Electronic Resource
English
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