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A platform for research: civil engineering, architecture and urbanism
Construction method for spiral hole forming ram-expanded CFG pile
The invention discloses a construction method for a spiral hole forming ram-expanded CFG pile. The construction method is used for solving the problems that according to existing CFG piles, hole collapse and hole shrinkage occur, underground water exists, a bearing course at a pile end is weak, and consequently process failures, concrete disintegration, high construction cost and poor pile body bearing capacity are caused. The construction method includes the first step of pile position determining, the second step of hole forming, the third step of installing of a pile casing, the fourth step of aggregate releasing, the fifth step of installing of an inner ramming barrel and a rammer and ramming and expanding of a hole bottom, the sixth step of pile bottom ramming and forming of a hole bottom expanded head, the seventh step of mixture releasing or concrete pouring and the eighth step of vibrating and compacting. In the construction process, the pile casing plays a wall protecting and water insulating role on a pile hole, and the problem of hole shrinkage is solved; underground water is discharged from the gap between the pile casing and the inner ramming barrel, it is guaranteed that the underground water can be discharged in time, and the quality of a pile body is improved; meanwhile, on one hand, undisturbed soil is compacted, on the other hand, the expanded head is formed at the pile end, the bearing capacity of the single pile is greatly improved, and the cost of a composite foundation is greatly reduced.
Construction method for spiral hole forming ram-expanded CFG pile
The invention discloses a construction method for a spiral hole forming ram-expanded CFG pile. The construction method is used for solving the problems that according to existing CFG piles, hole collapse and hole shrinkage occur, underground water exists, a bearing course at a pile end is weak, and consequently process failures, concrete disintegration, high construction cost and poor pile body bearing capacity are caused. The construction method includes the first step of pile position determining, the second step of hole forming, the third step of installing of a pile casing, the fourth step of aggregate releasing, the fifth step of installing of an inner ramming barrel and a rammer and ramming and expanding of a hole bottom, the sixth step of pile bottom ramming and forming of a hole bottom expanded head, the seventh step of mixture releasing or concrete pouring and the eighth step of vibrating and compacting. In the construction process, the pile casing plays a wall protecting and water insulating role on a pile hole, and the problem of hole shrinkage is solved; underground water is discharged from the gap between the pile casing and the inner ramming barrel, it is guaranteed that the underground water can be discharged in time, and the quality of a pile body is improved; meanwhile, on one hand, undisturbed soil is compacted, on the other hand, the expanded head is formed at the pile end, the bearing capacity of the single pile is greatly improved, and the cost of a composite foundation is greatly reduced.
Construction method for spiral hole forming ram-expanded CFG pile
PENG BO (author) / GAO XIAOFENG (author) / REN DONGXING (author) / LI YAOJIA (author) / PENG TAO (author) / DENG AN (author) / LUO DONGLIN (author)
2015-07-08
Patent
Electronic Resource
English
IPC:
E02D
FOUNDATIONS
,
Gründungen
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