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A platform for research: civil engineering, architecture and urbanism
Pile-forming construction process for super-long cast-in-place concrete pile based on gas lift reverse circulation
The invention discloses a gas lift reverse circulation-based super-long cast-in-place concrete pile forming construction process, which comprises the following steps of: forming a hole in a first section: burying a steel casing, and forming the hole in the first section by adopting a rotary drilling rig until the hole in the first section penetrates through a silt layer; second-section hole forming is conducted, specifically, a reverse circulation drilling machine positive circulation process is adopted for hole forming of a second section till the hole depth reaches the first target depth; primary hole cleaning: lifting the drill rod to a first distance from the bottom of the hole, and cleaning the hole for the first time by adopting a positive circulation hole cleaning method; repeating the steps S2 and S3 until the hole depth reaches a second target depth; hoisting and connecting a reinforcement cage, and lowering a guide pipe; cleaning the hole for the second time; and underwater concrete pouring. The hole cleaning efficiency is greatly improved, the pile bottom sediment thickness is reduced, and the pile foundation engineering construction quality is improved.
本发明公开一种基于气举反循环的超长混凝土灌注桩成桩施工工艺，该工艺包括：第一段成孔：埋设钢护筒，采用旋挖钻机成孔第一段，直到第一段孔穿过粉砂层；第二段成孔：采用反循环钻机正循环工艺成孔第二段，直到孔深达到第一目标深度；一次清孔：提起钻杆至距离孔底第一距离，采用正循环清孔方法进行第一次清孔；重复步骤S2和S3直到孔深达到第二目标深度；吊放连接钢筋笼，下放导管；二次清孔；水下混凝土浇筑。本发明大大提高清孔效率，减小桩底沉渣厚度，提高桩基工程施工质量。
Pile-forming construction process for super-long cast-in-place concrete pile based on gas lift reverse circulation
The invention discloses a gas lift reverse circulation-based super-long cast-in-place concrete pile forming construction process, which comprises the following steps of: forming a hole in a first section: burying a steel casing, and forming the hole in the first section by adopting a rotary drilling rig until the hole in the first section penetrates through a silt layer; second-section hole forming is conducted, specifically, a reverse circulation drilling machine positive circulation process is adopted for hole forming of a second section till the hole depth reaches the first target depth; primary hole cleaning: lifting the drill rod to a first distance from the bottom of the hole, and cleaning the hole for the first time by adopting a positive circulation hole cleaning method; repeating the steps S2 and S3 until the hole depth reaches a second target depth; hoisting and connecting a reinforcement cage, and lowering a guide pipe; cleaning the hole for the second time; and underwater concrete pouring. The hole cleaning efficiency is greatly improved, the pile bottom sediment thickness is reduced, and the pile foundation engineering construction quality is improved.
本发明公开一种基于气举反循环的超长混凝土灌注桩成桩施工工艺，该工艺包括：第一段成孔：埋设钢护筒，采用旋挖钻机成孔第一段，直到第一段孔穿过粉砂层；第二段成孔：采用反循环钻机正循环工艺成孔第二段，直到孔深达到第一目标深度；一次清孔：提起钻杆至距离孔底第一距离，采用正循环清孔方法进行第一次清孔；重复步骤S2和S3直到孔深达到第二目标深度；吊放连接钢筋笼，下放导管；二次清孔；水下混凝土浇筑。本发明大大提高清孔效率，减小桩底沉渣厚度，提高桩基工程施工质量。
Pile-forming construction process for super-long cast-in-place concrete pile based on gas lift reverse circulation
一种基于气举反循环的超长混凝土灌注桩成桩施工工艺
SUN YANTAO (author) / WEN TING (author) / LI GUIGANG (author) / YANG JINQIU (author) / XIN XUEJIAN (author) / LIU YUQIAN (author) / HAN CHUNPENG (author) / YANG RONGSHENG (author) / DUAN XIAOFANG (author)
2024-07-23
Patent
Electronic Resource
Chinese
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