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Construction method for mountainous complex terrain geological pile foundation
The invention discloses a mountainous area complex terrain geological pile foundation construction method, and relates to the field of pile foundation construction of complex terrains. The construction method adopts different construction methods according to different stratum conditions and stratum types of different drilling machines, and comprises the following situations: (1) grouting construction is carried out on a crushed gravel layer by adopting a rotary drilling machine, namely the rotary drilling machine penetrates through a crushed gravel interlayer; (2) aiming at the hard siliceous rock stratum, normally constructing the front strong weathered rock stratum by using a rotary drilling rig, reaming the middle and weak weathered layers by using the rotary drilling rig, and constructing the hard siliceous rock stratum by using the rotary drilling rig; and (3) carrying out combined construction on the soft sand soil layer by adopting a rotary drilling rig and a percussion drill, carrying out construction by penetrating the percussion drill through the soft sand soil layer, and then carrying out subsequent geological construction by adopting the rotary drilling rig. According to different geology, the construction efficiency is improved, rich experience is provided for follow-up pile foundation construction, investment of manpower, materials and machines is reduced, the pore-forming rate is improved, large waste caused by the pile foundation construction reworking phenomenon is reduced, and cost is saved.
本发明公开了一种山区复杂地形地质桩基施工工法，涉及复杂地形的桩基施工领域。该施工工法根据地层状况不同，同时也根据不同钻机钻孔的地层类型，采用不同的施工工法，包括如下情形：①针对碎砾石层采用旋挖钻注浆施工，即旋挖钻机穿越碎砾石夹层；②针对硬质硅质岩层：前面的强风化岩层，使用旋挖钻机正常施工，在中、弱风化层采用旋挖钻扩孔施工，旋挖钻机在硬质硅质岩层施工；③在软土砂土层，采用旋挖钻机、冲击钻机联合施工，冲击钻机穿越软砂土层施工，其后采用旋挖钻机进行后续地质的施工。本发明针对不同地质，提高了施工效率，为后续桩基施工提供丰富经验，减少人、材、机的投入，提高了成孔率，减少桩基施工返工现象造成较大的浪费，节约成本。
Construction method for mountainous complex terrain geological pile foundation
The invention discloses a mountainous area complex terrain geological pile foundation construction method, and relates to the field of pile foundation construction of complex terrains. The construction method adopts different construction methods according to different stratum conditions and stratum types of different drilling machines, and comprises the following situations: (1) grouting construction is carried out on a crushed gravel layer by adopting a rotary drilling machine, namely the rotary drilling machine penetrates through a crushed gravel interlayer; (2) aiming at the hard siliceous rock stratum, normally constructing the front strong weathered rock stratum by using a rotary drilling rig, reaming the middle and weak weathered layers by using the rotary drilling rig, and constructing the hard siliceous rock stratum by using the rotary drilling rig; and (3) carrying out combined construction on the soft sand soil layer by adopting a rotary drilling rig and a percussion drill, carrying out construction by penetrating the percussion drill through the soft sand soil layer, and then carrying out subsequent geological construction by adopting the rotary drilling rig. According to different geology, the construction efficiency is improved, rich experience is provided for follow-up pile foundation construction, investment of manpower, materials and machines is reduced, the pore-forming rate is improved, large waste caused by the pile foundation construction reworking phenomenon is reduced, and cost is saved.
本发明公开了一种山区复杂地形地质桩基施工工法，涉及复杂地形的桩基施工领域。该施工工法根据地层状况不同，同时也根据不同钻机钻孔的地层类型，采用不同的施工工法，包括如下情形：①针对碎砾石层采用旋挖钻注浆施工，即旋挖钻机穿越碎砾石夹层；②针对硬质硅质岩层：前面的强风化岩层，使用旋挖钻机正常施工，在中、弱风化层采用旋挖钻扩孔施工，旋挖钻机在硬质硅质岩层施工；③在软土砂土层，采用旋挖钻机、冲击钻机联合施工，冲击钻机穿越软砂土层施工，其后采用旋挖钻机进行后续地质的施工。本发明针对不同地质，提高了施工效率，为后续桩基施工提供丰富经验，减少人、材、机的投入，提高了成孔率，减少桩基施工返工现象造成较大的浪费，节约成本。
Construction method for mountainous complex terrain geological pile foundation
山区复杂地形地质桩基施工工法
FAN JINGYU (author) / LIU YI (author) / JIAO XIAOYU (author) / MA PAOSHENG (author) / LUO WENJUN (author) / CAO YONGJIE (author) / HAN GUOZHEN (author) / LI LINKE (author) / ZHANG JINGTAO (author) / WANG JI (author)
2022-08-02
Patent
Electronic Resource
Chinese
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