Construction method for overlength jet grouting stiffness core combined pile

A technology of core-core combined piles and rotary grouting piles, which is applied to sheet pile walls, foundation structure engineering, construction, etc., can solve the problems of pile bodies that cannot form the design diameter, weak connection of composite piles, and low-pressure grout injection. , to achieve the effect of enhancing the vertical and horizontal bearing capacity and water-retaining capacity, improving the utilization rate of profiles, and enhancing the overall adhesion
CN104895066AActive Publication Date: 2015-09-09JIANGSU HUAJIANG CONSTR GROUP
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
JIANGSU HUAJIANG CONSTR GROUP
Publication Date
2015-09-09

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Abstract

The invention discloses a construction method for an overlength jet grouting stiffness core combined pile. The construction method includes following steps: (1) determining the vertical and horizontal distribution conditions of high-pressure-bearing water sections and non-high-pressure-bearing water sections according to the geological condition, and determining the quantity and the diameter of jet grouting pile expansion sections in pile bodies of overlength jet grouting piles; (2) performing construction of a plurality of groups of overlength jet grouting piles by employing high-pressure jet grouting drills, and setting the spacing between the plurality of overlength jet grouting piles according to the diameter of the jet grouting pile expansion sections; (3) manufacturing components of pile connectors, assembling and connecting wing plates of I-steels of various unit lengths by employing wing plate connection bolts and wing plate connection boards in the transverse direction, and forming section steel piles in unit lengths; (4) inserting the section steel piles, assembling the section steel piles of various unit lengths via web connection bolts and web connection boards according to the design length of the section steel piles, and accomplishing the construction work of the overlength jet grouting stiffness core combined pile via assembling and inserting; and (5) accomplishing the construction of the jet grouting pile expansion sections and the overlength jet grouting piles.
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Description

technical field

[0001] The invention relates to a construction method of a rigid-flexible composite pile, in particular to a construction method suitable for a plurality of ultra-long rotary grouting piles and a section steel pile composite pile in a highly confined water foundation. Background technique

[0002] The high-pressure jet grouting method is a new technology developed by introducing high-pressure water flow technology based on the theory and practice of static pressure grouting. It is mainly used to strengthen the foundation and improve the shear strength of the foundation. It is often used for foundation anti-seepage, Improve the water flow properties of the foundation soil and stabilize the slope and other projects. According to different injection methods, it can be divided into single-pipe method, double-pipe method and triple-pipe method. The high-pressure rotary jet grouting method has the advantages of wide application range, convenient construction, and ...

Claims

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