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A platform for research: civil engineering, architecture and urbanism
Drill rod drilling machine capable of preventing hole shrinkage of soil compaction pile hole and construction method
The invention discloses a drill rod drilling machine for preventing compaction pile hole shrinkage and a construction method. According to the construction method and device for preventing diameter shrinkage of the soil-squeezing pile hole, a drill rod is rotated through a power head, the drill rod is pressurized downwards, a drill bit drills into soil to form a hole, and the pile hole reaches the preset depth by controlling the soil penetrating depth of the drill rod; and when the hole reaches the preset depth, a pile forming material is poured into the hole while the drill rod is lifted from the interior of the hole, so that the soil-squeezing and non-dumping pile is formed. When a hole is drilled and formed, the squeezing and expanding body squeezes a pile hole soil body at a time, a drill rod with a spiral drill blade is used at a soft and plastic-flow cohesive soil layer to carry out local small-amount soil taking, the soil squeezing negative effect of the soft and plastic-flow cohesive soil layer is weakened, and the soft and plastic-flow soil body is prevented from being squeezed into the hole. During concrete pouring and drill lifting, soil around a pile hole is subjected to secondary extrusion through the extrusion and expansion body arranged at the position close to the drill bit so as to ensure the compactness of the soil around the pile, and during concrete pouring and drill lifting, the soil around the pile hole is subjected to secondary extrusion through the extrusion and expansion body arranged at the position close to the drill bit so as to ensure the compactness of the soil around the pile.
一种防止挤土桩孔缩径的钻杆钻机及施工方法。本发明提供了一种防止挤土桩孔缩径的施工方法及装置，通过动力头旋转钻杆且对钻杆向下加压，使钻头钻入土中成孔，通过控制钻杆的入土深度使桩孔达到预定深度；当孔达到预定深度时，从孔内向提升钻杆的同时向孔内浇注成桩材料以形成挤土不排土桩。钻进成孔时，挤扩体对桩孔土体进行一次挤压，在软、流塑状黏性土层处使用带有螺旋钻叶的钻杆进行局部少量取土，削弱软、流塑状黏性土层的挤土负效应，防止软、流塑状土体向孔内挤压。灌注混凝土、提钻时，通过靠近钻头位置处设置的挤扩体对桩孔周围土体进行二次挤压，以确保桩周土体的密实度灌注混凝土、提钻时，通过靠近钻头位置处设置的挤扩体对桩孔周围土体进行二次挤压，以确保桩周土体的密实度。
Drill rod drilling machine capable of preventing hole shrinkage of soil compaction pile hole and construction method
The invention discloses a drill rod drilling machine for preventing compaction pile hole shrinkage and a construction method. According to the construction method and device for preventing diameter shrinkage of the soil-squeezing pile hole, a drill rod is rotated through a power head, the drill rod is pressurized downwards, a drill bit drills into soil to form a hole, and the pile hole reaches the preset depth by controlling the soil penetrating depth of the drill rod; and when the hole reaches the preset depth, a pile forming material is poured into the hole while the drill rod is lifted from the interior of the hole, so that the soil-squeezing and non-dumping pile is formed. When a hole is drilled and formed, the squeezing and expanding body squeezes a pile hole soil body at a time, a drill rod with a spiral drill blade is used at a soft and plastic-flow cohesive soil layer to carry out local small-amount soil taking, the soil squeezing negative effect of the soft and plastic-flow cohesive soil layer is weakened, and the soft and plastic-flow soil body is prevented from being squeezed into the hole. During concrete pouring and drill lifting, soil around a pile hole is subjected to secondary extrusion through the extrusion and expansion body arranged at the position close to the drill bit so as to ensure the compactness of the soil around the pile, and during concrete pouring and drill lifting, the soil around the pile hole is subjected to secondary extrusion through the extrusion and expansion body arranged at the position close to the drill bit so as to ensure the compactness of the soil around the pile.
一种防止挤土桩孔缩径的钻杆钻机及施工方法。本发明提供了一种防止挤土桩孔缩径的施工方法及装置，通过动力头旋转钻杆且对钻杆向下加压，使钻头钻入土中成孔，通过控制钻杆的入土深度使桩孔达到预定深度；当孔达到预定深度时，从孔内向提升钻杆的同时向孔内浇注成桩材料以形成挤土不排土桩。钻进成孔时，挤扩体对桩孔土体进行一次挤压，在软、流塑状黏性土层处使用带有螺旋钻叶的钻杆进行局部少量取土，削弱软、流塑状黏性土层的挤土负效应，防止软、流塑状土体向孔内挤压。灌注混凝土、提钻时，通过靠近钻头位置处设置的挤扩体对桩孔周围土体进行二次挤压，以确保桩周土体的密实度灌注混凝土、提钻时，通过靠近钻头位置处设置的挤扩体对桩孔周围土体进行二次挤压，以确保桩周土体的密实度。
Drill rod drilling machine capable of preventing hole shrinkage of soil compaction pile hole and construction method
一种防止挤土桩孔缩径的钻杆钻机及施工方法
WU XINMING (author) / LIANG QIANWEN (author) / WAN HAORAN (author) / LU JIANTAO (author) / HUANG WEI (author)
2022-12-09
Patent
Electronic Resource
Chinese
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