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A platform for research: civil engineering, architecture and urbanism
Method for increasing horizontal bearing capacity of pile foundation by using steel-gravel cylinder structure around pile
The invention discloses a method for increasing the horizontal bearing capacity of a pile foundation by using a steel-gravel cylinder structure around a pile. According to the method, the cylinder wall of the cylinder structure penetrates through a pile body and is installed on the top surface of foundation soil, gravel is filled in the cylinder wall, then horizontal external force is applied to the pile foundation so as to enable the pile body to move, and a soil layer below the inclined side of the pile body is compressed to deform at the moment, so that the part, which makes contact with acylinder bottom plate, of the pile body on the other side is separated so as to generate a gap, and the gravel filled in the cylindrical foundation can leak into the foundation soil from the gap. Similarly, loading is performed on the other sides of the pile body, so that soil bodies on the other sides are also subjected to the same effect. The steps are repeated in the piling process, so that shallow poor foundation soil can be replaced by gravel, and the horizontal resistance of the pile foundation is improved. The foundation form provided by the invention has the advantages that a single-pile foundation effectively controls vertical displacement and a cylindrical foundation effectively controls horizontal displacement, the horizontal bearing capacity and the bending bearing capacity ofthe foundation are increased, and the foundation form is particularly suitable for foundations of structures with complex stress such as offshore wind turbines and the like.
本发明公开了一种利用桩周钢‑碎砂石筒结构提升桩基水平承载力的方法。本发明将筒结构的筒壁穿过桩身安装至地基土顶面，往内填筑碎砂石料，再对桩基施加水平外力使桩身发生位移，此时桩身倾斜侧下方土层受到压缩产生变形，从而使另一侧桩身与筒体底板接触的部分脱离，产生空隙，筒型基础内部填筑的砂石料可从空隙漏至地基土中。同理，从桩身其余侧进行加载可使其余侧土体也受到同样作用。在打桩的过程中重复上述步骤，可实现碎砂石置换浅部不良地基土，提升桩基水平抗力。本发明所提出的基础形式兼具单桩基础有效控制竖向位移与筒型基础效控制水平向位移的优势，提高了基础的水平承载力及抗弯承载力，特别适用于海上风机等受力复杂构筑物的基础。
Method for increasing horizontal bearing capacity of pile foundation by using steel-gravel cylinder structure around pile
The invention discloses a method for increasing the horizontal bearing capacity of a pile foundation by using a steel-gravel cylinder structure around a pile. According to the method, the cylinder wall of the cylinder structure penetrates through a pile body and is installed on the top surface of foundation soil, gravel is filled in the cylinder wall, then horizontal external force is applied to the pile foundation so as to enable the pile body to move, and a soil layer below the inclined side of the pile body is compressed to deform at the moment, so that the part, which makes contact with acylinder bottom plate, of the pile body on the other side is separated so as to generate a gap, and the gravel filled in the cylindrical foundation can leak into the foundation soil from the gap. Similarly, loading is performed on the other sides of the pile body, so that soil bodies on the other sides are also subjected to the same effect. The steps are repeated in the piling process, so that shallow poor foundation soil can be replaced by gravel, and the horizontal resistance of the pile foundation is improved. The foundation form provided by the invention has the advantages that a single-pile foundation effectively controls vertical displacement and a cylindrical foundation effectively controls horizontal displacement, the horizontal bearing capacity and the bending bearing capacity ofthe foundation are increased, and the foundation form is particularly suitable for foundations of structures with complex stress such as offshore wind turbines and the like.
本发明公开了一种利用桩周钢‑碎砂石筒结构提升桩基水平承载力的方法。本发明将筒结构的筒壁穿过桩身安装至地基土顶面，往内填筑碎砂石料，再对桩基施加水平外力使桩身发生位移，此时桩身倾斜侧下方土层受到压缩产生变形，从而使另一侧桩身与筒体底板接触的部分脱离，产生空隙，筒型基础内部填筑的砂石料可从空隙漏至地基土中。同理，从桩身其余侧进行加载可使其余侧土体也受到同样作用。在打桩的过程中重复上述步骤，可实现碎砂石置换浅部不良地基土，提升桩基水平抗力。本发明所提出的基础形式兼具单桩基础有效控制竖向位移与筒型基础效控制水平向位移的优势，提高了基础的水平承载力及抗弯承载力，特别适用于海上风机等受力复杂构筑物的基础。
Method for increasing horizontal bearing capacity of pile foundation by using steel-gravel cylinder structure around pile
利用桩周钢-碎砂石筒结构提升桩基水平承载力的方法
WANG KUIHUA (author) / QIU XINCHEN (author) / TU YUAN (author) / WU JUNTAO (author) / ZHAO SHUANG (author)
2021-03-19
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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