Abstract
In this paper, numerical simulation with soil-water coupling finite element-finite difference (FE-FD) analysis is conducted to investigate the settlement and the excess pore water pressure (EPWP) of a piled-raft foundation due to cyclic high-speed (speed: 300km/h) train loading. To demonstrate the performance of this numerical simulation, the settlement and EPWP in the ground under the train loading within one month was calculated and confirmed by monitoring data, which shows that the change of the settlement and EPWP can be simulated well on the whole. In order to ensure the safety of train operation, countermeasure by the fracturing grouting is proposed. Two cases are analyzed, namely, grouting in No-4 softest layer and No-9 pile bearing layer respectively. It is found that fracturing grouting in the pile bearing layer (No-9 layer) has better effect on reducing the settlement.
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Acknowledgments
The Support of National Natural Science Foundation of China (Grant Nos. 41627801 and 41372284), the Special Project Fund of Taishan Scholars of Shandong Province (Grant No. 2015-212) and China Postdoctoral Science Foundation (Grant No. 2017M612227) are greatly appreciated.
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Supported by: National Natural Science Foundation of China under Grant Nos. 41627801 and 41372284, The Special Project Fund of Taishan Scholars of Shandong Province under Grant No. 2015-212, China Postdoctoral Science Foundation under Grant No. 2017M612227
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Gu, L., Ye, G., Wang, Z. et al. Settlement mechanism of piled-raft foundation due to cyclic train loads and its countermeasure. Earthq. Eng. Eng. Vib. 16, 499–511 (2017). https://doi.org/10.1007/s11803-017-0403-z
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DOI: https://doi.org/10.1007/s11803-017-0403-z