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A platform for research: civil engineering, architecture and urbanism
Construction method for rotary excavating cast-in-situ bored pile in cofferdam
The invention relates to the technical field of cofferdam cast-in-place pile construction, in particular to a construction method of a rotary excavating cast-in-place bored pile in a cofferdam, which comprises the following steps: S1, construction preparation and pile position lofting; s2, slurry preparation, pile casing burying and slurry injection; s3, hole drilling, hole cleaning and hole inspection are carried out; s4, a reinforcement cage is machined and hoisted, and the center deviation of the reinforcement cage is controlled; s5, conducting pipe pressure test and installation; s6, secondary hole cleaning and underwater concrete pouring are conducted; and S7, the steel casing is pulled out. In the process before drilling, the concentric circles are drawn with the center of the hole to be drilled as the circle center, the auxiliary piles are driven in sequence along the peripheries of the concentric circles, then the circular check rings are built with the auxiliary piles as the basis, and the circular check rings can block the peripheries of the holes in the drilling construction process; therefore, the situation that broken soil around a hole continuously falls into the hole in the drilling construction process can be effectively avoided, effective acting in the drilling process is improved, and the hole forming quality can be further guaranteed.
本发明涉及围堰灌注桩施工技术领域，具体为一种围堰内旋挖钻孔灌注桩施工方法，包括以下步骤，S1：施工准备和桩位放样；S2：泥浆制备、护筒埋设和注入泥浆；S3：钻孔、清孔和检孔；S4：钢筋笼加工、吊装以及控制钢筋笼的中心偏差；S5：导管试压及安装；S6：二次清孔和水下混凝土灌注；S7：起拔钢护筒。本发明，在进行钻孔之前过程中，以待钻孔的中心为圆心，画出同心圆，并沿着同心圆的四周依次打入辅助桩，然后以辅助桩为基础，建立圆形挡圈，圆形挡圈在施工钻孔的过程中，可以对孔的四周进行格挡，因此可以有效地避免在施工钻孔的过程中，孔四周的碎土不断掉落到孔内部的情况，提高钻孔过程的有效做功，并可以进一步保证成孔的质量。
Construction method for rotary excavating cast-in-situ bored pile in cofferdam
The invention relates to the technical field of cofferdam cast-in-place pile construction, in particular to a construction method of a rotary excavating cast-in-place bored pile in a cofferdam, which comprises the following steps: S1, construction preparation and pile position lofting; s2, slurry preparation, pile casing burying and slurry injection; s3, hole drilling, hole cleaning and hole inspection are carried out; s4, a reinforcement cage is machined and hoisted, and the center deviation of the reinforcement cage is controlled; s5, conducting pipe pressure test and installation; s6, secondary hole cleaning and underwater concrete pouring are conducted; and S7, the steel casing is pulled out. In the process before drilling, the concentric circles are drawn with the center of the hole to be drilled as the circle center, the auxiliary piles are driven in sequence along the peripheries of the concentric circles, then the circular check rings are built with the auxiliary piles as the basis, and the circular check rings can block the peripheries of the holes in the drilling construction process; therefore, the situation that broken soil around a hole continuously falls into the hole in the drilling construction process can be effectively avoided, effective acting in the drilling process is improved, and the hole forming quality can be further guaranteed.
本发明涉及围堰灌注桩施工技术领域，具体为一种围堰内旋挖钻孔灌注桩施工方法，包括以下步骤，S1：施工准备和桩位放样；S2：泥浆制备、护筒埋设和注入泥浆；S3：钻孔、清孔和检孔；S4：钢筋笼加工、吊装以及控制钢筋笼的中心偏差；S5：导管试压及安装；S6：二次清孔和水下混凝土灌注；S7：起拔钢护筒。本发明，在进行钻孔之前过程中，以待钻孔的中心为圆心，画出同心圆，并沿着同心圆的四周依次打入辅助桩，然后以辅助桩为基础，建立圆形挡圈，圆形挡圈在施工钻孔的过程中，可以对孔的四周进行格挡，因此可以有效地避免在施工钻孔的过程中，孔四周的碎土不断掉落到孔内部的情况，提高钻孔过程的有效做功，并可以进一步保证成孔的质量。
Construction method for rotary excavating cast-in-situ bored pile in cofferdam
一种围堰内旋挖钻孔灌注桩施工方法
OUYANG CHUILI (author) / LIU ZHU (author) / LIU ZHENGXIONG (author) / ZHENG MINGXING (author) / LIU HAITAO (author) / ZENG MUHONG (author) / NING YUNFANG (author) / GUO ZHIGANG (author) / HAN XUEZHONG (author) / ZHANG BOFA (author)
2022-08-12
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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