High-pressure injection grouting expanded-base inlaid-type pile and preparation method

Abstract

A high-pressure jet grouting bottom expansion embedded pile and a preparation method thereof. The invention belongs to the technical field of construction, and in particular relates to an improved structure and preparation method of an expanded bottom pile. The upper section of the pile body is any one of concrete pouring pile, steel cage concrete pouring pile, prefabricated pile, prefabricated pipe pile and steel pipe pile, and the lower section of the pile body is a high-pressure jet grouting reinforced body with a diameter The lower end of the body is embedded in the lower reinforcement body. The pile body of the present invention has simple structure, low construction cost, simple process, the size and quality of the expanded bottom section can be easily and accurately controlled according to the design requirements, the pile body and the underground soil layer are well combined, the composite pile body has high strength and high bearing capacity, It is suitable for the construction of various pile bodies and various pile types, and can save a lot of cement or concrete.

Description

technical field [0001] The invention belongs to the technical field of construction, and in particular relates to an improved structure and preparation method of an expanded bottom pile. Background technique [0002] As the height of urban high-rise buildings becomes higher and higher, the requirements for the bearing capacity of pile foundations are also higher and higher. The corresponding technical means is to increase the size of piles used in buildings, but the problem is that the amount of cement is too large. The construction cost is high. In order to solve this problem, Chinese patent document 2016201082643 (a kind of pile with rotary drilling, grouting and bottom expansion first) proposes the idea that the pile for building is divided into two parts, that is, the upper section of the pile is a pile of equal diameter, and the lower section of the pile is The pile with enlarged diameter can greatly reduce the amount of cement used, while ensuring the strength of the ...

AI Technical Summary

Problems solved by technology

Even though the high-pressure jet grouting technology is also used for pile formation, it is only used for the continuous pile wall of the ultra-deep underground water-stop curtain. The reason why jet grouting piles are not used for load-bearing is that the construction cost is high, the process is complicated, and the pile body has no sandy concrete, resulting in low strength.

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