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A platform for research: civil engineering, architecture and urbanism
Column hammer impact expansion pile and CFG pile combined relay pile-forming construction method
The invention relates to a column hammer punching and expanding pile and CFG pile combined relay pile forming construction method, which comprises the following steps of: carrying out underground precipitation on a construction area until the underground water level is lower than the bottom elevation of a column hammer punching and expanding pile and is kept at the underground water level; a to-be-compacted soil layer at the upper part of the pile forming hole is punched and expanded by the column hammer; the upper column hammer pile hole is backfilled with plain soil, the plain soil backfilled in the column hammer pile hole is tamped, and the upper soil layer needing to be compacted is secondarily compacted; stopping dewatering or intermittently dewatering, and constructing a CFG pile on the backfilled pile-hammer-pile impulsion-expansion pile position until a preset elevation of the total pile length is reached; and underwater concrete pouring is conducted through the CFG pile guide pipe. The technical problem that in the prior art, a pile type cannot completely improve complex geological conditions is solved. According to the method, the characteristics of the column hammer punching and expanding pile machine and the CFG pile machine are fully utilized, the advantages are enhanced, the disadvantages are avoided, and the advantages and applicable characteristics of each pile type are fully exerted to overcome different foundation layers.
本发明涉及一种柱锤冲扩桩和CFG桩结合的接力成桩施工方法，包括如下步骤：对施工区域进行地下降水，直至地下水水位低于柱锤冲扩桩底标高并保持在该地下水水位；柱锤冲扩桩成孔上部需被挤密的土层；素土回填上部柱锤桩孔，并对柱锤桩孔回填的素土进行夯实，二次挤密上部需被挤密的土层；停止降水或间歇降水，在已回填的柱锤桩冲扩桩位上施工CFG桩，直至至总体桩长的预定标高；利用CFG桩导管进行水下灌注混凝土。本发明解决了现有技术中一种桩型无法完全改善复杂地质条件的技术问题。本方法充分利用的柱锤冲扩桩机和CFG桩机的自身特点扬长避短，充分发挥每种桩型的优势及适用特征克服不同地基层。
Column hammer impact expansion pile and CFG pile combined relay pile-forming construction method
The invention relates to a column hammer punching and expanding pile and CFG pile combined relay pile forming construction method, which comprises the following steps of: carrying out underground precipitation on a construction area until the underground water level is lower than the bottom elevation of a column hammer punching and expanding pile and is kept at the underground water level; a to-be-compacted soil layer at the upper part of the pile forming hole is punched and expanded by the column hammer; the upper column hammer pile hole is backfilled with plain soil, the plain soil backfilled in the column hammer pile hole is tamped, and the upper soil layer needing to be compacted is secondarily compacted; stopping dewatering or intermittently dewatering, and constructing a CFG pile on the backfilled pile-hammer-pile impulsion-expansion pile position until a preset elevation of the total pile length is reached; and underwater concrete pouring is conducted through the CFG pile guide pipe. The technical problem that in the prior art, a pile type cannot completely improve complex geological conditions is solved. According to the method, the characteristics of the column hammer punching and expanding pile machine and the CFG pile machine are fully utilized, the advantages are enhanced, the disadvantages are avoided, and the advantages and applicable characteristics of each pile type are fully exerted to overcome different foundation layers.
本发明涉及一种柱锤冲扩桩和CFG桩结合的接力成桩施工方法，包括如下步骤：对施工区域进行地下降水，直至地下水水位低于柱锤冲扩桩底标高并保持在该地下水水位；柱锤冲扩桩成孔上部需被挤密的土层；素土回填上部柱锤桩孔，并对柱锤桩孔回填的素土进行夯实，二次挤密上部需被挤密的土层；停止降水或间歇降水，在已回填的柱锤桩冲扩桩位上施工CFG桩，直至至总体桩长的预定标高；利用CFG桩导管进行水下灌注混凝土。本发明解决了现有技术中一种桩型无法完全改善复杂地质条件的技术问题。本方法充分利用的柱锤冲扩桩机和CFG桩机的自身特点扬长避短，充分发挥每种桩型的优势及适用特征克服不同地基层。
Column hammer impact expansion pile and CFG pile combined relay pile-forming construction method
柱锤冲扩桩和CFG桩结合的接力成桩施工方法
GAO FULIANG (author) / CHENG ZHANYU (author) / LIU DAWEI (author) / HU JIANZHONG (author) / LI QUANLIANG (author) / PANG LEI (author) / ZHOU YUNRUI (author) / ZHANG BO (author) / YANG JING (author) / SHEN XUSHUANG (author)
2024-02-09
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
Pile hammer device and precast pile construction equipment
| European Patent Office | 2021