Composite driven snowflake type pile system and construction method

Abstract

The invention discloses a composite driven snowflake type pile system and a construction method. The system comprises a cement mixing pile outer core, a snowflake type steel plate pile inner core, a guide assembly, a pile connecting device and a cement paste state monitoring system; a pile cap is installed on the top of the snowflake type steel plate pile inner core and connected with a bearing platform; and when the length of the cement mixing pile outer core exceeds the set length, the snowflake type steel plate pile inner core is driven into the cement mixing pile outer core which is not initially set in a segmented pile connecting manner through the pile connecting device and the guide assembly. According to the composite driven snowflake type pile system and the construction method, the bearing characteristics of a cement mixing pile and a snowflake type steel plate pile are combined, the situation that due to the fact that the size of a high-strength steel plate pile is relatively small, the side friction resistance and the structural stability are insufficient is made up for, and the bearing capacity of a pile body is improved. According to the composite driven snowflake type pile system and the construction method, the construction cost is balanced, the bearing capacity of the pile body is enhanced, the application range is wide, the composite driven snowflake type pile system and the construction method are used for solving the problems of soft soil foundation reinforcement, foundation pit supporting and differential settlement of a bridgehead, and wide application prospects are achieved in the fields of bridges, foundation pits and roads.

Description

technical field [0001] The invention relates to wet-process cement mixing piles in construction and rock and soil and steel sheet piles in geological engineering, in particular to a compound driven snowflake pile system and a construction method. Background technique [0002] With the rapid development of buildings vertically and horizontally, their stress state is becoming more and more complex, and the requirements for bearing characteristics are constantly increasing. Pile foundations need to have the ability to resist horizontal loads and vertical loads. Especially when the soft soil layer of the foundation is thick, the load on the upper part of the building is relatively large, the utilization of the foundation engineering is poor, and it is easy to deform under the load, resulting in overall settlement or local uneven settlement. Moreover, the building requires that no cracks be allowed in the fence structure, and the requirements for the settlement limit are relative...

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: The purpose of the present invention is to provide a composite driven-in snowflake pile system and construction method to solve the problem that ordinary piles in the prior art cannot provide sufficient side friction resistance, resulting in pile foundation instability; and soft soil Disadvantages of pile length changes due to the distribution of regional bearing layers

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