In response to the consolidation problem of concrete pipe pile composite foundation, the theory of equal strain assumption is used to consider the radial and vertical seepage of soil without sand filling in the pipe, as well as the semi permeability of the pile-soil interface and the influence of load changes over time. The analytical solution for the consolidation of concrete pipe pile composite foundation is derived. The correctness and rationality of the solution have been verified through degradation research. Finally, the influence of various related factors on the consolidation characteristics of concrete pipe pile composite foundation was studied through parameter analysis. Research has shown that the faster the loading, the faster the consolidation of the composite foundation, with the fastest consolidation occurring during instantaneous loading; The faster the loading, the stronger the influence of permeability rate, permeable hole radius, smearing effect, and wellbore diameter ratio on the consolidation of composite foundation.

Yuguo Zhang, Zilai Zhang, Chunhao Zhao, Zhaobin Zhang. Theoretical study on consolidation of concrete pipe pile composite foundation considering permeability and time-varying load effects. Academic Journal of Architecture and Geotechnical Engineering (2024) Vol. 6, Issue 4: 70-79. https://doi.org/10.25236/AJAGE.2024.060411.

[1] Hu R, Zhang M, Wang J. An investigation into the influence of sample height on the consolidation behaviour of dredged silt[J]. Applied Sciences, 2023, 13(18): 10419.

[2] Zeng Chaofeng, Xue Xiuli, Mei Guoxiong. A review of recent advances in permeable pipe pile[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(S2): 228-231. 

[3] Gong Xiaonan. Formation and development of composite foundation theory and technology application system[J]. Journal of Ground Improvement, 2019, 1(1): 7-16.

[4] Yang Tao, Wan Yihao, He Desheng. State the art of consolidation theory for composite ground[J]. Industrial Construction, 2015, 45(1): 152-155. 

[5] Tang Xiaowu, Yang Xiaoqiu, Yu Yue. Analytical solutions to drained consolidation of porous pipe pile[J]. Rock and Soil Mechanics, 2019, 40(4): 1248-1254. 

[6] Tang Xiaowu, Zou Yuan, Lin Weikang, et al. Model experiment on improving bearing capacity of perforated pipe piles by vacuum consolidation[J]. Journal of Zhejiang University(Engineering Science), 2022, 56(7): 1320-1327. 

[7] Shen Lin, Zeng Chaofeng, Mei Guoxiong, et al. Experimental study on flexural properties of permeable pipe pile[J]. Building Structure, 2020, 50(7): 130-135.

[8] Wang Jing, Xiao Tao, Zhu Honghu, et al. Study on bearing capacity of permeable pipe pile by field optical fiber monitoring[J]. Rock and Soil Mechanics, 2021, 42(7): 1961-1970.

[9] Huang Yong, Wang Jun, Mei Guoxiong. Model experimental study of accelerating dissipation of excess pore water pressure in soil around a permeable pipe pile[J]. Rock and Soil Mechanies, 2016, 37(10): 2893-2899. 

[10] Ni P, Mangalathu S, Mei G. Laboratory investigation of pore pressure dissipation in clay around permeable piles[J]. Canadian Geotechnical Journal, 2018, 55(9): 1257-1267.

[11] Ni P, Mangalathu S, Mei G. Compressive and flexural behaviour of reinforced concrete permeable piles [J]. Engineering Structures, 2017, 147(2017): 316-327.

[12] Lei Jinbo, Yang Jinyou, Li Zhuangzhuang, et al. Experimental study on bearing capacity of composite foundation of pipe-pile with holes and cap[J]. Journal of Building Structures, 2018, 39(11): 166-174. 

[13] Tang Xiaowu, Yang Xiaoqiu, Yu Yue. Analytical solutions to drained consolidation of porous pipe pile [J]. Rock and Soil Mechanics, 2019, 40(4): 1248-1254.

[14] Tang Xiaowu, Liu Jiangnan, Yang Xiaoqiu, et al. Theoretical study of dynamic pore water pressure dissipation characteristics of open-hole pipe pile[J]. Rock and Soil Mechanics, 2019, 40(9): 3335-3343. 

[15] Chen Junbo, Zhang Xian. Analytical solution of soil consolidation around drainage pipe pile after pile driving [J]. Journal of Xian University of Architecture & Technology (Natural Science Edition), 2021, 53(05): 636-642. 

[16] Chen Jie, Zhou Feng. Consolidation Behavior Analysis of Soil around Drainage Pipe Pile[J]. Building Science, 2015, 31(01): 29-32.   

[17] Han Bolin, Lu Mengmeng. Theoretical study of consolidation of composite ground with permeable concrete piles considering pile penetration deformation[J]. Rock and Soil Mechanics, 2023, 44(8): 2360-2368. 

[18] Hu Min, Cao Wengui, Cui Penglu, et al. One-dimensional Nonlinear Consolidation Analysis of Soft Soil Considering Variable Load and Non-Darcy Seepage[J]. Journal of Yangtze River Scientific Research Institute, 2024, 41(2): 151-158.

[19] Shi Lantian, Li Chuanxun, Yang Yang. Analytical solution for consolidation of soft soils with vertical drains by considering variable well resistance with time and depth and time-dependent loading [J]. Rock and Soil Mechanics, 2023, 44(1): 183-192.

[20] Ge Shangqi, Jiang Wenghao, Zheng Lingsui, et al. The general analytical solutions for one-dimensional large deformation consolidation of soft soils with time-dependent loading[J]. Chinese Journal of Rock Mechanics and Engineering, 2022, 41 (S2): 3464-3475.

[21] Wu Sisi, Luo Wenqiang, Li Yincan, et al. Analysis of one-dimensional nonlinear consolidation of soft soil considering time-dependent loading with continuous drainage boundary[J]. Rock and Soil Mechanics, 2022, 43(6): 1503-1512.

[22] Chen Yu, Li Chuanxun, Feng Cuixia. Analytical solution for one-dimensional consolidation of soft soils under a partially permeable boundary condition and a time-dependent loading considering the threshold hydraulic gradient[J]. Rock and Soil Mechanics, 2021, 42(11): 3008-3016.

[23] Deng Y, Xie K, Lu M, et al. Consolidation by prefabricated vertical drains considering the time dependent well resistance[J]. Geotextiles and Geomembranes, 2013, 36(5): 20–26.

[24] Chen Z, Xiao T, Feng J, et al. Mathematical characterization of pile–soil interface boundary for consolidation analysis of soil around permeable pipe pile[J]. Canadian Geotechnical Journal, 2021, 58(9): 1277-1288.