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A platform for research: civil engineering, architecture and urbanism
Construction method for large-diameter full-rock-socketed thick pebble covering layer near-river bridge pile
The invention discloses a construction method of a large-diameter full-rock-socketed thick pebble covering layer near-river bridge pile. The construction method comprises the following steps: constructing an island; a steel casing is embedded, the steel casing is embedded in the pile construction position, the diameter of the steel casing is larger than that of the drill hole, the steel casing is formed by combining multiple sections of casing bodies, and the casing bodies are sequentially pressed into the casing bodies in a segmented rotating mode through a drilling machine till the steel casing bodies enter the rock stratum by 1.5 m or above; drilling construction is conducted, specifically, when construction is conducted under the ground and the water surface, a rotary excavating bucket is adopted for construction, and when drilling is conducted to a hard rock stratum, a coring drill bit is adopted for construction, and a final hole is formed; cleaning the hole and lowering a reinforcement cage, and after the reinforcement cage is lowered, carrying out secondary hole cleaning by adopting a gas lift reverse circulation method; and after the secondary hole cleaning inspection is qualified, concrete pouring construction is carried out immediately. According to the method, the problems of high construction difficulty and long construction period of the large-diameter full-rock-socketed thick pebble covering layer near-river drilling pile column are solved, the hole-forming construction stability is good, the hole-forming quality is good, the drilling construction efficiency is high, and the quality of a pile foundation is well guaranteed.
本发明公开了一种大直径全嵌岩厚卵石覆盖层临江桥梁桩柱施工方法，包括以下步骤：筑岛施工；埋设钢护筒，在桩柱施工位置埋设钢护筒，钢护筒直径大于钻孔直径，钢护筒采用多节护筒组合而成，采用钻机依次分段旋转压入护筒，直至钢护筒进入岩层1.5m以上；钻孔施工，在地面水面以下施工时，采用旋挖斗施工，当钻进至坚硬岩层时，采用取芯钻头施工，成型出终孔；清孔并下放钢筋笼，在下放钢筋笼后，采用气举反循环法进行二次清孔；在二次清孔检查合格后立即进行砼灌注施工。本发明解决了大直径全嵌岩厚卵石覆盖层临江钻孔桩柱施工难度大、施工周期长的问题，成孔施工稳定性好，成孔质量好，钻孔施工效率高，并很好地保证了桩基的质量。
Construction method for large-diameter full-rock-socketed thick pebble covering layer near-river bridge pile
The invention discloses a construction method of a large-diameter full-rock-socketed thick pebble covering layer near-river bridge pile. The construction method comprises the following steps: constructing an island; a steel casing is embedded, the steel casing is embedded in the pile construction position, the diameter of the steel casing is larger than that of the drill hole, the steel casing is formed by combining multiple sections of casing bodies, and the casing bodies are sequentially pressed into the casing bodies in a segmented rotating mode through a drilling machine till the steel casing bodies enter the rock stratum by 1.5 m or above; drilling construction is conducted, specifically, when construction is conducted under the ground and the water surface, a rotary excavating bucket is adopted for construction, and when drilling is conducted to a hard rock stratum, a coring drill bit is adopted for construction, and a final hole is formed; cleaning the hole and lowering a reinforcement cage, and after the reinforcement cage is lowered, carrying out secondary hole cleaning by adopting a gas lift reverse circulation method; and after the secondary hole cleaning inspection is qualified, concrete pouring construction is carried out immediately. According to the method, the problems of high construction difficulty and long construction period of the large-diameter full-rock-socketed thick pebble covering layer near-river drilling pile column are solved, the hole-forming construction stability is good, the hole-forming quality is good, the drilling construction efficiency is high, and the quality of a pile foundation is well guaranteed.
本发明公开了一种大直径全嵌岩厚卵石覆盖层临江桥梁桩柱施工方法，包括以下步骤：筑岛施工；埋设钢护筒，在桩柱施工位置埋设钢护筒，钢护筒直径大于钻孔直径，钢护筒采用多节护筒组合而成，采用钻机依次分段旋转压入护筒，直至钢护筒进入岩层1.5m以上；钻孔施工，在地面水面以下施工时，采用旋挖斗施工，当钻进至坚硬岩层时，采用取芯钻头施工，成型出终孔；清孔并下放钢筋笼，在下放钢筋笼后，采用气举反循环法进行二次清孔；在二次清孔检查合格后立即进行砼灌注施工。本发明解决了大直径全嵌岩厚卵石覆盖层临江钻孔桩柱施工难度大、施工周期长的问题，成孔施工稳定性好，成孔质量好，钻孔施工效率高，并很好地保证了桩基的质量。
Construction method for large-diameter full-rock-socketed thick pebble covering layer near-river bridge pile
大直径全嵌岩厚卵石覆盖层临江桥梁桩柱施工方法
ZHU YONGSHENG (author) / CAO WEN (author) / YAO WANGMING (author) / SHI HONGCHAO (author) / LIANG SHUANG (author) / LI XIN (author) / ZHANG BIN (author) / GUO JIANQIANG (author) / CHANG XUEFENG (author) / LIU YULONG (author)
2023-07-04
Patent
Electronic Resource
Chinese
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