A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Precast pile wet-process implanting, hammering and re-driving construction method
The invention relates to a construction method for wet-process planting, hammering and re-driving of a precast pile. The construction method comprises the steps of wet-process pile planting, hammering and re-driving and a construction process of taking high-fluidity delayed coagulation fine aggregate concrete as an outer core filling material. According to the principle, firstly, a rotary drilling rig is adopted to form a hole in a pile position; pouring an outer core filling material into the hole; then water is sprayed to wet the pile body, and the precast pile is planted into the hole through hammering equipment; and finally, hammering and re-driving to form the pile. The method has the advantages that when the guide hole is used for planting the pile, the pile wall is not isolated from the outer core concrete, and the pile side friction resistance is increased; and through hammering, the pile end is embedded and fixed in a bearing layer, and the pile foundation quality is improved. Meanwhile, high-fluidity delayed coagulation fine aggregate concrete is adopted as an outer core filling material, the initial setting time is controlled, and the pile planting difficulty is reduced. In addition, secondary slag removal is not needed during rotary digging of the hole bottom; pile jumping construction is not needed when the precast pile is implanted, the equipment moving frequency is reduced, and the piling efficiency is improved.
本发明涉及一种预制桩湿法植入锤击复打施工工法，包括：湿法植桩、锤击复打、以大流动性缓凝细石混凝土作为外芯填充材料的施工工艺。原理是：先采用旋挖钻机在桩位处成孔；随后孔内灌注外芯填充材料；之后洒水湿润桩身，并使用锤击设备将预制桩植入孔中；最后锤击复打成桩。本发明的优势是：引孔植桩时，桩壁不会与外芯混凝土之间产生隔离，增大了桩侧摩阻；通过锤击，使桩端嵌固持力层，提高了桩基质量。同时，采用大流动性缓凝细石混凝土作为外芯填充材料，控制了初凝时间，减少了植桩难度。此外，本发明还兼具旋挖孔底无需二次清渣；植入预制桩无需跳桩施工，减少设备移机频率，提高打桩效率等优点。
Precast pile wet-process implanting, hammering and re-driving construction method
The invention relates to a construction method for wet-process planting, hammering and re-driving of a precast pile. The construction method comprises the steps of wet-process pile planting, hammering and re-driving and a construction process of taking high-fluidity delayed coagulation fine aggregate concrete as an outer core filling material. According to the principle, firstly, a rotary drilling rig is adopted to form a hole in a pile position; pouring an outer core filling material into the hole; then water is sprayed to wet the pile body, and the precast pile is planted into the hole through hammering equipment; and finally, hammering and re-driving to form the pile. The method has the advantages that when the guide hole is used for planting the pile, the pile wall is not isolated from the outer core concrete, and the pile side friction resistance is increased; and through hammering, the pile end is embedded and fixed in a bearing layer, and the pile foundation quality is improved. Meanwhile, high-fluidity delayed coagulation fine aggregate concrete is adopted as an outer core filling material, the initial setting time is controlled, and the pile planting difficulty is reduced. In addition, secondary slag removal is not needed during rotary digging of the hole bottom; pile jumping construction is not needed when the precast pile is implanted, the equipment moving frequency is reduced, and the piling efficiency is improved.
本发明涉及一种预制桩湿法植入锤击复打施工工法，包括：湿法植桩、锤击复打、以大流动性缓凝细石混凝土作为外芯填充材料的施工工艺。原理是：先采用旋挖钻机在桩位处成孔；随后孔内灌注外芯填充材料；之后洒水湿润桩身，并使用锤击设备将预制桩植入孔中；最后锤击复打成桩。本发明的优势是：引孔植桩时，桩壁不会与外芯混凝土之间产生隔离，增大了桩侧摩阻；通过锤击，使桩端嵌固持力层，提高了桩基质量。同时，采用大流动性缓凝细石混凝土作为外芯填充材料，控制了初凝时间，减少了植桩难度。此外，本发明还兼具旋挖孔底无需二次清渣；植入预制桩无需跳桩施工，减少设备移机频率，提高打桩效率等优点。
Precast pile wet-process implanting, hammering and re-driving construction method
一种预制桩湿法植入锤击复打施工工法
LIU ZHENG (author) / YU LICHENG (author) / TENG LU (author) / ZHOU QIWEN (author) / HUANG DONGCHANG (author)
2024-02-13
Patent
Electronic Resource
Chinese
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