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A platform for research: civil engineering, architecture and urbanism
Hard granite stratum variable cross-section pile foundation hole forming method and pouring method
The invention discloses a hard granite stratum variable cross-section pile foundation hole forming method and pouring method.The hole forming method comprises the following steps that S1, a pile foundation operation platform is erected, and a pile casing positioning and guiding device is installed on the pile foundation operation platform so that the axial deviation and verticality construction quality of a pile foundation in water can be improved; s2, the pile casing is lowered down along the pile casing positioning and guiding device, and the pile casing is vibrated and buried into a rock stratum in water through a vibration device; s3, a rotary drilling rig is in place, a rotary drilling rock-entering pile forming mode is adopted, a multi-drill-bit combined sleeve drill extends into the pile casing, and drilling is conducted on the rock stratum step by step; and drilling construction of the lower portion of the variable-cross-section pile foundation is completed until the drill bit drills to the designed bottom elevation of the pile foundation. According to the pile casing positioning and guiding device, the mode that the pile casing positioning and guiding device is installed on the pile foundation operation platform is adopted, the pile casing can be directly vibrated through the vibration device, the pile casing can be conveniently positioned and buried in a rock stratum in water, it can be guaranteed that the pile casing cannot deviate in the vibration process, and the perpendicularity of the pile casing is guaranteed.
本发明公开了一种硬质花岗岩地层变截面桩基成孔方法及浇筑方法，所述成孔方法包括以下步骤：S1.搭设桩基作业平台，并在桩基作业平台上安装护筒定位导向装置，以提高水中桩基轴向偏位及竖直度施工质量；S2.护筒顺着护筒定位导向装置下放，采用震动装置将护筒震动埋设至水中岩层；S3.旋挖钻机就位，采用旋挖入岩成桩方式，通过多钻头组合套钻伸入至护筒内并对岩层分步钻孔；直至钻头钻进至桩基设计底标高，完成变截面桩基下部钻孔施工。本发明采用在桩基作业平台上安装护筒定位导向装置的方式，可直接通过震动装置对护筒进行震动，便于护筒定位埋设在水中的岩层内，还能够保证护筒在震动过程中不会发生偏移，保证护筒的垂直度。
Hard granite stratum variable cross-section pile foundation hole forming method and pouring method
The invention discloses a hard granite stratum variable cross-section pile foundation hole forming method and pouring method.The hole forming method comprises the following steps that S1, a pile foundation operation platform is erected, and a pile casing positioning and guiding device is installed on the pile foundation operation platform so that the axial deviation and verticality construction quality of a pile foundation in water can be improved; s2, the pile casing is lowered down along the pile casing positioning and guiding device, and the pile casing is vibrated and buried into a rock stratum in water through a vibration device; s3, a rotary drilling rig is in place, a rotary drilling rock-entering pile forming mode is adopted, a multi-drill-bit combined sleeve drill extends into the pile casing, and drilling is conducted on the rock stratum step by step; and drilling construction of the lower portion of the variable-cross-section pile foundation is completed until the drill bit drills to the designed bottom elevation of the pile foundation. According to the pile casing positioning and guiding device, the mode that the pile casing positioning and guiding device is installed on the pile foundation operation platform is adopted, the pile casing can be directly vibrated through the vibration device, the pile casing can be conveniently positioned and buried in a rock stratum in water, it can be guaranteed that the pile casing cannot deviate in the vibration process, and the perpendicularity of the pile casing is guaranteed.
本发明公开了一种硬质花岗岩地层变截面桩基成孔方法及浇筑方法，所述成孔方法包括以下步骤：S1.搭设桩基作业平台，并在桩基作业平台上安装护筒定位导向装置，以提高水中桩基轴向偏位及竖直度施工质量；S2.护筒顺着护筒定位导向装置下放，采用震动装置将护筒震动埋设至水中岩层；S3.旋挖钻机就位，采用旋挖入岩成桩方式，通过多钻头组合套钻伸入至护筒内并对岩层分步钻孔；直至钻头钻进至桩基设计底标高，完成变截面桩基下部钻孔施工。本发明采用在桩基作业平台上安装护筒定位导向装置的方式，可直接通过震动装置对护筒进行震动，便于护筒定位埋设在水中的岩层内，还能够保证护筒在震动过程中不会发生偏移，保证护筒的垂直度。
Hard granite stratum variable cross-section pile foundation hole forming method and pouring method
硬质花岗岩地层变截面桩基成孔方法及浇筑方法
LI YUANXING (author) / LIN GUANGDONG (author) / LU HAIJUN (author) / CHEN ZHONGWEN (author) / ZHAN CHUANZE (author) / ZHOU MIAO (author) / REN PANFENG (author) / LIU CHEN (author) / LUO YU (author) / SHA HANGYU (author)
2023-08-15
Patent
Electronic Resource
Chinese
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