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梁善斋. 水泥土复合管桩竖向承载特性现场试验[J]. 岩土工程学报, 2021, 43(S2): 280-283. DOI: 10.11779/CJGE2021S2065
引用本文: 梁善斋. 水泥土复合管桩竖向承载特性现场试验[J]. 岩土工程学报, 2021, 43(S2): 280-283. DOI: 10.11779/CJGE2021S2065
LIANG Shan-zhai. Field tests on vertical bearing capacity of pipe piles in cement-improved soil[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(S2): 280-283. DOI: 10.11779/CJGE2021S2065
Citation: LIANG Shan-zhai. Field tests on vertical bearing capacity of pipe piles in cement-improved soil[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(S2): 280-283. DOI: 10.11779/CJGE2021S2065

水泥土复合管桩竖向承载特性现场试验

Field tests on vertical bearing capacity of pipe piles in cement-improved soil

  • 摘要: 依托某水泥土复合管桩工现场载荷试验,分析了竖向荷载作用下水泥土复合管桩轴力、桩侧摩阻力和桩身压缩量沿桩身的分布特征。测试结果表明,竖向荷载下水泥土复合管桩荷载-沉降曲线呈缓变性,桩身轴力沿桩身近似呈线性递减,桩端荷载约占总荷载的15%~20%,水泥土复合管桩桩侧摩阻力承担80%~85%的竖向荷载;水泥土与管桩的界面摩阻力较天然土与管桩界面摩阻力提升6~9倍;水泥土复合管桩桩身压缩量占总沉降量的为20%~30%。研究成果可为水泥土复合管桩竖向承载设计计算提供依据。

     

    Abstract: In order to study the load transfer of the pipe piles in cement-improved soil under vertical loads, the axial load tests are conducted to analyze the distribution characteristics of axial force, side friction and compression along the pile body. The results show that the load-settlement curves of the pipe piles in cement-improved soil change slowly and gradually. The axial force of the piles decreases linearly along the pile depth. The vertical loads at the bottom of the piles range from 15% to 20% of the vertical loads, and the side friction of the piles in cement-improved soil bears 80% ~ 85% of the vertical loads. The side friction of the piles in cement-improved soil is 6~9 times that of the piles in natural surrounding soil. The ratio of the pile compression to the total settlement is 20%~30%. The research results may provide technical support for the vertical bearing design practice of the piles in cement-improved soil.

     

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