Deep thick mud pool cast-in-situ bored pile and construction method

Abstract

The invention relates to a deep thick mud pool cast-in-situ bored pile comprising a cement-mixing pile and a cast-in-situ bored pile. The cement-mixing pile and the cast-in-situ bored pile enter an unsolidified zone through a shallow solidified hard shell layer, the cement-mixing pile comprises a mixing pile reserved hole, an enlarged pile top and a partially-enlarged pile body, the cement-mixingpile is arranged in the mixing pile reserved hole, the enlarged pile top is arranged at the upper end of the cement-mixing pile, and the partially-enlarged pile body is arranged at the lower end of the cement-mixing pile; the cast-in-situ bored pile includes a pile casing fixing cylinder with an end plate, an inner steel pile casing, an outer steel pile casing, an opening-and-closing lifting rod,a casing pipe, an integral cutting opening formwork with a cutting edge and a steel reinforcement cage limiting frame. The deep thick mud pool cast-in-situ bored pile has the beneficial effects that construction of a pile casing reserved hole can be carried out before the shallow solidified hard shell layer is solidified, a steel tube for being reserved in the hole is embedded, then the pipe casings are pulled out and a hole formwork is buried, therefore the problem of the construction difficulty of the mixing pile reserved hole after the shallow hard shell layer is completely hardened is effectively solved, and the construction efficiency is improved.

Description

Technical field [0001] The invention relates to a deep and thick mud pool bored pile and a construction method, belonging to the field of foundation engineering, and is suitable for the construction of deep thick mud pool and silt soil bored pile and cement mixing pile. Background technique [0002] With the maturity of my country's construction engineering technology and the rapid development of the industry, cement mixing piles and bored piles are widely used in foundation reinforcement and other projects. For large-scale infrastructure construction, due to geological conditions, there are special deep mud pools and shallow solidification. Due to the limitation of conditions, the conventional cement mixing pile and bored pile construction methods cannot meet the construction requirements, and the construction organization is extremely difficult. The deep mud pool bored pile construction method is a more effective measure to solve this problem. Summary of the invention [0003] Th...

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Problems solved by technology

[0002] With the maturity of my country's construction engineering technology and the rapid development of the industry, cement mixing piles and bored piles are widely used in foundation reinforcement and other projects. For large-scale infrastructure construction, due to geological conditions there are special conditions such as deep mud pools and shallow solidification. Due to the limitation of conditions, the construction method of conventional cement mixing piles and bored piles cannot meet the construction requirements, and the construction organization is extremely difficult. However, the construction method of bored piles in deep mud pools is a more effective measure to solve this problem

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