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刘永超, 卫超群, 陆鸿宇, 李刚. 软土地区倾斜静力压桩法沉桩机理研究及应用[J]. 岩土工程学报, 2021, 43(S2): 158-161. DOI: 10.11779/CJGE2021S2038
引用本文: 刘永超, 卫超群, 陆鸿宇, 李刚. 软土地区倾斜静力压桩法沉桩机理研究及应用[J]. 岩土工程学报, 2021, 43(S2): 158-161. DOI: 10.11779/CJGE2021S2038
LIU Yong-chao, WEI Chao-qun, LU Hong-yu, LI Gang. Sinking mechanism of inclined static piling method and its application in soft soil areas[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(S2): 158-161. DOI: 10.11779/CJGE2021S2038
Citation: LIU Yong-chao, WEI Chao-qun, LU Hong-yu, LI Gang. Sinking mechanism of inclined static piling method and its application in soft soil areas[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(S2): 158-161. DOI: 10.11779/CJGE2021S2038

软土地区倾斜静力压桩法沉桩机理研究及应用

Sinking mechanism of inclined static piling method and its application in soft soil areas

  • 摘要: 专用设备及施工经验的缺乏导致倾斜桩在城市岩土工程中应用较少。首先介绍课题组倾斜静力压桩机的研制历程并与传统设备进行对比,提出了倾斜静力压桩法的设备选型、桩体强度的考量因素及压桩力的控制公式,然后对倾斜静力压桩法的沉桩机理进行了研究,通过现场斜向、竖直两个方向的静力触探试验、压桩力监测结果得出斜向静力触探贯入阻力、压桩力均略大于竖直向,且规律类似,最后结合工程实际,对比传统支护方案表明倾斜静力压桩法具有低成本、高效率、环保等优点,适用于多数软土地区城市岩土工程。

     

    Abstract: Inclined piles are barely applied in urban geotechnical engineering with the absence of professional infrastructures and practice experience. The development process of the inclined static piling equipment of the authers' group is firstly introduced, and a comparison with the traditional static piling is equipment is made. The relevant factors for equipment selection and pile strength of the inclined static piling method are put forward, and the control formula for the pile-pressing force is proposed. Secondly, the pile sinking mechanism of the inclined static piling method is investigated by monitoring the inclined and vertical CPT and static piling process. It is obtained that the resistance of CPT and the pile-pressing force in the inclined direction are slightly larger than those in the vertical direction, and the laws are similar. Finally, by combining with engineering practice and comparing with the traditional supporting scheme, the proposed method is more cost-effective, efficient and environmentally friendly to be employed in most urban geotechnical engineering.

     

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