| 高鲁超，张继生，戴国亮，陈浩.水泥土加固单桩水平承载性能离心机模型试验[J].海洋工程,2026,(1):61~72 |
| 水泥土加固单桩水平承载性能离心机模型试验 |
| Centrifuge modelling tests on the horizontal bearing behaviors of monopile reinforced with cement-soil |
| 投稿时间：2024-11-14 修订日期：2024-12-18 |
| DOI：10.16483/j.issn.1005-9865.2026.01.006 |
| 中文关键词: 海上风电 大直径桩基础 水泥土 离心机试验 水平承载力 |
| 英文关键词:offshore wind power large-diameter pile foundation cement-soil centrifuge test horizontal bearing capacity |
| 基金项目:国家自然科学基金资助项目（52078128）；海岸灾害及防护教育部重点实验室（河海大学）开放基金项目（202303） |
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| 中文摘要: |
| 为研究水泥土加固对海上风电单桩水平承载性能的提升效果，开展了水泥土加固大直径单桩水平承载性能离心机模型试验，对比分析水泥土加固前后大直径单桩水平承载力、桩身弯矩及桩身p?y曲线变化规律；基于水泥土应变软化模型，建立水泥土加固大直径单桩三维数值模型，分析水泥土加固参数对单桩水平承载力的影响特性。结果表明：加固前后单桩荷载-位移曲线变化趋势相同，加固桩水平极限承载力明显大于未加固桩；加固桩最大弯矩位于泥面附近，水泥土加固能有效改善桩周土体性质，提高桩基抗弯能力；加固前后桩身p-y曲线均满足双曲正切型函数变化规律，加固桩的初始刚度和极限土抗力均得到大幅度提高；加固宽度和加固深度是影响单桩水平承载力的主要因素，实际工程中应当合理优化水泥土加固范围和置换率，达到性能提升的目的。 |
| 英文摘要: |
| To study the improvement effect of cement-soil reinforcement on the horizontal bearing performance of offshore wind turbine monopiles, centrifuge model tests of large-diameter monopiles reinforced with cement-soil were conducted. The changes in horizontal bearing capacity, bending moment, and p-y curves of large-diameter monopiles before and after cement-soil reinforcement piles were compared. Based on the strain-softening model of cement-soil, a three-dimensional numerical model of large-diameter monopiles reinforced with cement-soil was established to analyze the influence of reinforcement parameters on the horizontal bearing capacity. The results show that the load-displacement curves of monopiles exhibit the same trend for before and after reinforcement, while the ultimate bearing capacity of reinforced monopiles is significantly greater than that of unreinforced monopiles. The maximum bending moment of reinforced monopiles is located near the mud surface. Cement-soil reinforcement effectively improves the properties of the soil around the pile, thereby enhancing the bending capacity of the pile foundation. The p-y curves of the pile shaft before and after reinforcement both follow the hyperbolic tangent function, and the initial stiffness and ultimate soil resistance of the reinforced monopiles are markedly improved. Reinforcement width and depth are the main factors affecting the horizontal bearing capacity of monopiles. In practical engineering, the reinforcement range and replacement ratio of cement-soil should be optimized reasonably to improve performance. |
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