A composite driven snowflake pile system and construction method

Abstract

The invention discloses a composite driven snowflake pile system and a construction method. The system comprises an outer core of a cement mixing pile, an inner core of a snowflake steel sheet pile, a guide component, a pile connecting device and a cement slurry state monitoring system; a snowflake steel plate A pile cap is installed on the top of the inner core of the pile, and the pile cap is connected with the bearing platform; when the outer core of the cement mixing pile exceeds the set length, the inner core of the snowflake-type steel sheet pile is driven into the pile through the pile connection device and the guide assembly by means of segment connection. The outer core of uninitialized cement mixing pile. The invention combines the bearing characteristics of the cement mixing pile and the snowflake steel sheet pile, makes up for the insufficient lateral friction resistance and insufficient structural stability caused by the relatively small volume of the high-strength steel sheet pile, and improves the bearing capacity of the pile body. The invention balances the construction cost, enhances the bearing capacity of the pile body, has a wide range of applications, is used to solve the problems of soft soil foundation reinforcement, foundation pit support and differential settlement of bridge heads, and has broad application prospects in the fields of bridges, foundation pits and roads. .

Description

technical field [0001] The invention relates to wet cement mixing piles in construction and rock and soil and steel sheet piles in geological engineering, in particular to a composite driven snowflake pile system and a construction method. Background technique [0002] With the rapid development of vertical and horizontal buildings, their stress states are becoming more and more complex, and the requirements for bearing characteristics are constantly increasing. The pile foundation needs 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 large, the utilization of the foundation project is poor, and it is easy to deform under the load, resulting in the overall settlement or local uneven settlement. Moreover, the building requires no cracks in the fence structure, and the requirements for the settlement limit are relatively strict. Therefore, the abili...

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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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