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Construction method for expanding bottom and forming pile by reamer bit for hard rock in deep and easily collapsed stratum
The invention relates to the technical field of bottom-expanding pile forming, and discloses a bottom-expanding pile forming construction method for a hard rock reamer bit in a deep and easy-to-collapse stratum, which comprises the following steps: putting an outer pile casing in a pile position, and positioning the outer pile casing in a soil layer; an inner pile casing is put into the outer pile casing, the center of the inner pile casing is aligned with the center of the pile position, a soil body is drilled in the inner pile casing synchronously through a rotary drilling rig, and a soil layer hole is formed in the inner pile casing; a cone barrel drill is adopted for drilling and coring in the rock stratum, and rock stratum holes are formed in the rock stratum; full-section grinding is conducted on the bottom of the rock stratum hole through a full-section hob drill bit; a reamer bit is adopted to conduct reaming rotation in a rock stratum hole, the outer diameter of the rock stratum hole is enlarged, the rock stratum hole forms a reaming section, the reaming section is communicated with a soil layer hole, a pile hole is formed, the pile hole is cleaned, after a reinforcement cage is put into the pile hole, concrete is poured into the pile hole, and the concrete in the pile hole is solidified to form a cast-in-place pile. Therefore, the effects of reliable quality, quick drilling and expanding, safety, convenience and low cost are achieved.
本发明涉及扩底成桩的技术领域，公开了深厚易塌地层硬岩扩孔钻头扩底成桩施工方法，包括在桩位中下入外护筒，外护筒位于土层中；在外护筒中下入内护筒，且内护筒的中心与桩位的中心对齐布置，且同步利用旋挖钻机在内护筒中钻取土体，内护筒中形成土层孔；采用牙轮筒钻在岩层中钻进取芯，在岩层中形成岩层孔；利用全断面滚刀钻头在岩层孔的底部进行全断面磨平；采用扩孔钻头在岩层孔中进行扩孔转动，将岩层孔的外径扩大，岩层孔形成扩孔段，扩孔段与土层孔连通，形成桩孔，对桩孔进行清孔，在桩孔中下入钢筋笼后，往桩孔中灌注混凝，桩孔中的混凝土凝固形成灌注桩。这样，达到了质量可靠、钻扩快捷、安全便利、成本经济的效果。
Construction method for expanding bottom and forming pile by reamer bit for hard rock in deep and easily collapsed stratum
The invention relates to the technical field of bottom-expanding pile forming, and discloses a bottom-expanding pile forming construction method for a hard rock reamer bit in a deep and easy-to-collapse stratum, which comprises the following steps: putting an outer pile casing in a pile position, and positioning the outer pile casing in a soil layer; an inner pile casing is put into the outer pile casing, the center of the inner pile casing is aligned with the center of the pile position, a soil body is drilled in the inner pile casing synchronously through a rotary drilling rig, and a soil layer hole is formed in the inner pile casing; a cone barrel drill is adopted for drilling and coring in the rock stratum, and rock stratum holes are formed in the rock stratum; full-section grinding is conducted on the bottom of the rock stratum hole through a full-section hob drill bit; a reamer bit is adopted to conduct reaming rotation in a rock stratum hole, the outer diameter of the rock stratum hole is enlarged, the rock stratum hole forms a reaming section, the reaming section is communicated with a soil layer hole, a pile hole is formed, the pile hole is cleaned, after a reinforcement cage is put into the pile hole, concrete is poured into the pile hole, and the concrete in the pile hole is solidified to form a cast-in-place pile. Therefore, the effects of reliable quality, quick drilling and expanding, safety, convenience and low cost are achieved.
本发明涉及扩底成桩的技术领域，公开了深厚易塌地层硬岩扩孔钻头扩底成桩施工方法，包括在桩位中下入外护筒，外护筒位于土层中；在外护筒中下入内护筒，且内护筒的中心与桩位的中心对齐布置，且同步利用旋挖钻机在内护筒中钻取土体，内护筒中形成土层孔；采用牙轮筒钻在岩层中钻进取芯，在岩层中形成岩层孔；利用全断面滚刀钻头在岩层孔的底部进行全断面磨平；采用扩孔钻头在岩层孔中进行扩孔转动，将岩层孔的外径扩大，岩层孔形成扩孔段，扩孔段与土层孔连通，形成桩孔，对桩孔进行清孔，在桩孔中下入钢筋笼后，往桩孔中灌注混凝，桩孔中的混凝土凝固形成灌注桩。这样，达到了质量可靠、钻扩快捷、安全便利、成本经济的效果。
Construction method for expanding bottom and forming pile by reamer bit for hard rock in deep and easily collapsed stratum
深厚易塌地层硬岩扩孔钻头扩底成桩施工方法
CHEN CHAOLIANG (author) / FENG DONGDONG (author) / LIU HUIMING (author) / LEI BIN (author) / TONG XIN (author) / LI CHENGLIN (author) / XU GUOBING (author) / ZHANG ZHIYONG (author) / WANG XINQIAO (author) / ZHANG CHANGHUAN (author)
2023-12-29
Patent
Electronic Resource
Chinese
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