Pile-forming method for drilling cast-in-place pile
A technology of bored piles and piles, which is applied to sheet pile walls, buildings, and foundation structure engineering, etc. It can solve problems such as separation, deviation, and segregation of reinforcement cages, and achieve the effects of improving integrity and reducing separation and deviation
Inactive Publication Date: 2017-03-29
江苏远卓地下工程技术有限公司
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Problems solved by technology
Reinforced concrete bored piles have many disadvantages. First, the reinforcement cages are bound and spliced, and the separation and deviation of the reinforcement cages may occur during the construction process.
If the pile foundation is deep and the vibration is uneven, it is easy to produce segregation during the concrete pouring process, which seriously affects the quality of the pile foundation
Method used
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[0013] 1: Drill the hole first, and then clean the hole after reaching the design elevation.
[0014] 2: Lower the hollow steel pipe with the side full of small holes.
[0015] 3: The outside and inside of the steel pipe are covered with graded gravel, and at the same time, the grouting pipe is lowered in the middle of the steel pipe until the gravel is covered with the entire pile.
[0016] 4: Start high-pressure injection of cement slurry, and the pile will be formed after the slurry is filled.
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The invention discloses a pile-forming method for a drilling cast-in-place pile. An existing steel reinforcement cage is replaced by a steel pipe, and commercial concrete is replaced by crushed stones and cement paste. Firstly, punching is conducted by means of a driller, and after a designed elevation is reached, clearing actions are conducted. Then, the hollow steel pipe(small holes are drilled in the surface of the steel pipe) is placed downward. After the steel pipe is placed, the outer portion and the inner portion of the steel pipe are covered with graded crushed stones, and meanwhile a grouting pipe is downward placed inside the steel pipe; after the whole pile is fully filled with the crushed stones, the cement paste is started to be injected in a high-pressure mode; and after the pile is filled with the cement paste, pile forming is finished. According to the pile-forming method for the drilling cast-in-place pile, the phenomena that the steel reinforcement cage may separate and deviate, and the concrete may segregate in the process of construction are avoid. In addition, the pile-forming method has the advantages that the method is simple, the structure is solid, construction cost is not high, and the method is suitable for being applied and popularized in related technical fields.
Description
[0001] Technical field: The patent of the present invention relates to the field of construction engineering, in particular to a method for forming bored piles. [0002] technical background: [0003] Existing reinforced concrete bored piles, this type of pile foundation is formed into piles by lowering the reinforcement cage and then pouring concrete. Reinforced concrete bored piles have many disadvantages. First, the reinforcement cages are tied and spliced, and the separation and deviation of the reinforcement cages may occur during the construction process. If the pile foundation is deep and the vibration is uneven, it is easy to produce segregation during the concrete pouring process, which seriously affects the quality of the pile foundation. [0004] Invention content: [0005] The purpose of the patent of the present invention is to provide a method for forming a bored pile in view of the deficiencies in the prior art. [0006] The patent of the present invention uses...
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IPC IPC(8): E02D5/38
CPCE02D5/38
Inventor燕立群
Owner江苏远卓地下工程技术有限公司