大型高架站桥对临近高铁沉降影响算法与控制

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Abstract Research purposes: The modified fine layering summation method is used to predict the influence of construction of a large elevated station on the settlement of adjacent piers of high-speed railway in Beijing area, realizing the rapid prediction of settlement influence in construction process. First, based on the Saint Venant's Principle, the vertical load of the elevated station bridge pile foundation was simulated as a rectangle load with different positions and depths, and additional stress value was calculated using the Mindlin solution. Then, the soil hardening model is used to simulate the compressive stiffness of the soil and fit the compressive modulus. The equivalent pier method is further used to calculate the settlement effect. The calculated thickness of soil layer is 0.1~1.0 m. After verifying the algorithm with finite element method and field measured data, the settlement influence of subsequent construction was predicted, and balanced casting method and stack-load balancing method are proposed to control the influence of uneven settlement on the existing bridge.
Research conclusions: (1) The proposed algorithm required 1/14 of the calculation time of a finite element model of the same scale, and the maximum absolute error is 0.94 mm with the measured data, and the relative error is 12%, which meets the engineering requirements. (2) The construction control measures proposed are reasonable and effective, and have strong practicability, which can provide a reference for similar projects.

Key words： elevated station bridge adjacent high-speed railway settlement effect practical model dynamic control

Received: 26 September 2022

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	MENG Fanzeng

Cite this article:

MENG Fanzeng. Algorithm and Control of Influence of Large Elevated Station Bridge on Settlement of Adjacent High-speed Railway[J]. Journal of Railway Engineering Society, 2022, 39(12): 66-72.

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https://tdgcxb.crec.cn/EN/ OR https://tdgcxb.crec.cn/EN/Y2022/V39/I12/66

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