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Construction method of prefabricated hollow pile expansion pile and prefabricated hollow pile expansion pile formed by construction method
The invention discloses a construction method of a prefabricated hollow pile expansion pile and the prefabricated hollow pile expansion pile formed by the construction method. The construction method that the prefabricated hollow pile is externally arranged is adopted, and in the construction process, a spiral drilling tool is concentrically inserted into an inner hole cavity of the prefabricated hollow pile; in the process of spiral soil-squeezing drilling and prefabricated hollow pile sinking, a conical soil-squeezing part at the bottom end of a spiral soil-squeezing drill bit at the lower end of the spiral drilling tool is always kept to extend out of the bottom end of the prefabricated hollow pile. According to the prefabricated hollow pile expansion pile and the construction method, the advantages of low carbon and high pile body strength of a high-strength concrete prefabricated pile are fully played, the bearing capacity of a formed pile foundation is improved, the pile foundation cost is reduced, and the adverse effect of a soil squeezing negative effect is reduced; the pile foundation is more energy-saving, more environment-friendly, higher in quality and wider in adaptability to geological conditions.
本发明公开一种预制空心桩扩展桩的施工方法及其形成的预制空心桩扩展桩。采用预制空心桩外置的施工方法，施工过程中，将螺旋钻具同中心地插入预制空心桩的内孔腔里；在螺旋挤土钻进和下沉预制空心桩过程中，始终保持螺旋钻具下端的螺旋挤土钻头底端锥体挤土部分伸出预制空心桩底端。本发明充分发挥高强度混凝土预制桩的低碳、桩身强度高的优点，提高所成桩基础的承载能力，降低桩基础成本，降低挤土负效应的不良影响，本发明提出的一种预制空心桩扩展桩及施工方法，通过改变整体桩型结构和桩土间结合作用方式，实现桩基础的更节能、更环保、质量更高、适应地质条件更广。
Construction method of prefabricated hollow pile expansion pile and prefabricated hollow pile expansion pile formed by construction method
The invention discloses a construction method of a prefabricated hollow pile expansion pile and the prefabricated hollow pile expansion pile formed by the construction method. The construction method that the prefabricated hollow pile is externally arranged is adopted, and in the construction process, a spiral drilling tool is concentrically inserted into an inner hole cavity of the prefabricated hollow pile; in the process of spiral soil-squeezing drilling and prefabricated hollow pile sinking, a conical soil-squeezing part at the bottom end of a spiral soil-squeezing drill bit at the lower end of the spiral drilling tool is always kept to extend out of the bottom end of the prefabricated hollow pile. According to the prefabricated hollow pile expansion pile and the construction method, the advantages of low carbon and high pile body strength of a high-strength concrete prefabricated pile are fully played, the bearing capacity of a formed pile foundation is improved, the pile foundation cost is reduced, and the adverse effect of a soil squeezing negative effect is reduced; the pile foundation is more energy-saving, more environment-friendly, higher in quality and wider in adaptability to geological conditions.
本发明公开一种预制空心桩扩展桩的施工方法及其形成的预制空心桩扩展桩。采用预制空心桩外置的施工方法，施工过程中，将螺旋钻具同中心地插入预制空心桩的内孔腔里；在螺旋挤土钻进和下沉预制空心桩过程中，始终保持螺旋钻具下端的螺旋挤土钻头底端锥体挤土部分伸出预制空心桩底端。本发明充分发挥高强度混凝土预制桩的低碳、桩身强度高的优点，提高所成桩基础的承载能力，降低桩基础成本，降低挤土负效应的不良影响，本发明提出的一种预制空心桩扩展桩及施工方法，通过改变整体桩型结构和桩土间结合作用方式，实现桩基础的更节能、更环保、质量更高、适应地质条件更广。
Construction method of prefabricated hollow pile expansion pile and prefabricated hollow pile expansion pile formed by construction method
一种预制空心桩扩展桩的施工方法及其形成的预制空心桩扩展桩
ZHAO SHIFAN (author) / ZHAO YUE (author) / LU SHUANG (author) / WU JIANXIANG (author) / HONG HAK-CHEOL (author) / WANG LILI (author) / LIU TAO (author) / WANG JINLAI (author) / NIU JINGHAN (author) / KIM SU-HWAN (author)
2024-01-19
Patent
Electronic Resource
Chinese
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