EXPERIMENTAL STUDY ON LATERAL BEARING BEHAVIOR OF CEMENT COMPOSITE MONOPILES

Wei Guqiang; He Zirui; Liu Guangdong; Hu Congchuan; Gao Luchao

doi:10.19912/j.0254-0096.tynxb.2021-0632

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (12) : 353-359. DOI: 10.19912/j.0254-0096.tynxb.2021-0632

EXPERIMENTAL STUDY ON LATERAL BEARING BEHAVIOR OF CEMENT COMPOSITE MONOPILES

Wei Guqiang¹, He Zirui¹, Liu Guangdong¹, Hu Congchuan¹, Gao Luchao²

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Abstract

In order to research the lateral bearing behavior of cement composite piles, a model test was carried out. The variation law of ultimate bearing capacity, pile bending moment and surrounding soil resistance of single pile before and after soil-cement reinforcement is compared and analyzed. Considering the radial inhomogeneity of surrounding soil, the initial foundation reaction modulus and ultimate soil resistance were revised to attain the simplified p-y curves model. In addition, the simplified method was verified by comparing with the test results. The results show that compared with the unreinforced piles, the ultimate bearing capacity of reinforced piles is significantly improved. The bearing capacity of two kinds of reinforcement width is increased 5.34 and 2.68 times, respectively. Whether reinforced pile or unreinforced pile, the bending moment is same variation tendency along loading and depth, and the maximum moment point is different. The maximum point of the reinforced pile is located near the mud surface. The cement-soil improvement effectively enhances the soil resistance of pile shaft, and then enhances the lateral bearing capacity of piles. The comparison test results show that the calculated values are in good agreement with the measured ones, which verify the rationality of the simplified calculation method. This paper can provide the new design ideas and theoretical reference for offshore wind turbine foundations.

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offshore wind turbines / pile foundation / bearing capacity / model test / p-y curve

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Wei Guqiang, He Zirui, Liu Guangdong, Hu Congchuan, Gao Luchao. EXPERIMENTAL STUDY ON LATERAL BEARING BEHAVIOR OF CEMENT COMPOSITE MONOPILES[J]. Acta Energiae Solaris Sinica. 2022, 43(12): 353-359 https://doi.org/10.19912/j.0254-0096.tynxb.2021-0632

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