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Under-pressure balance pile forming method for control modulus pile

A technology of pressure balance and modulus piles, which is applied in the direction of sheet pile walls, foundation structure tests, construction, etc., can solve problems such as broken piles, uneven pile formation of long piles, and restrictions on the in-depth development of composite foundation theory and practice. Ensure the quality of the pile and ensure the uniformity of the effect

Inactive Publication Date: 2016-11-16
SOUTHEAST UNIV
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Problems solved by technology

[0002] Composite foundation is currently the most widely used soft soil foundation treatment method in the field of geotechnical engineering. Due to the complexity of foundation soil conditions, the current research on the mechanism of bearing characteristics of composite foundation is difficult to meet the requirements of actual engineering. Semi-empirical and semi-simplified quantification, because the pile formation and testing equipment can not meet the actual needs, resulting in the problem of uneven pile formation or pile breakage of long piles, which seriously restricts the further development of composite foundation theory and practice

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  • Under-pressure balance pile forming method for control modulus pile

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Embodiment Construction

[0013] Such as figure 1 Shown: a control modulus pile forming equipment, which consists of a drill bit 1, a motor 2, a control platform 3, a drill frame 4, a drill pipe 5, a transmission chain 6, a slurry pipe 7, a concrete pump 8, a concrete pool 9, belt The pressure balance control valve 10, the pressure sensor 11, and the crawler belt 12 that the drilling rig moves, wherein the drill bit 1 and the drill pipe 5 are provided with longitudinal through holes, and the output port of the concrete pump 8 passes through the upper end of the slurry pipe 7 and the drill pipe 5. The lower part of the drill pipe 5 is connected with the control platform 3, and the control platform 3 is fixed on the base of the drilling rig. They are respectively connected to the left and right sides of the control platform 3, the motor 2 is fixed on the base of the drilling rig, the transmission shaft of the motor 2 is linked with the transmission chain 6 and the driving part of the control platform 3, ...

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Abstract

The invention discloses a method for forming a controlled modulus pile with pressure balance. The method includes: 1) preparing concrete according to the strength of the pile body according to the requirements of deformation control; The sensor (11) is connected with the pressure balance control valve (10) to measure the lateral pressure of the soil layer in real time during the drilling process; 3) during the drilling process, the drill pipe (5) is filled with concrete , control and adjust the pressure of the concrete in the drill pipe in real time according to the side pressure value measured by the pressure sensor, and keep it balanced; 4) When the drill reaches the design depth, stop drilling, lift the drill bit 20cm, and raise the concrete pump (8 ), the concrete output valve is automatically opened after pressurization, and the concrete is pressed into the borehole while the drill pipe is evenly lifted, at a lifting speed of 1.0‑1.5m / min until the ground level is reached, and the pile is completed. The method of the invention ensures the uniformity and quality of the long piles of the controlled modulus piles.

Description

technical field [0001] The invention relates to a pressure-balanced pile forming method of a control modulus pile, which belongs to the field of geotechnical engineering composite foundations. Background technique [0002] Composite foundation is currently the most widely used soft soil foundation treatment method in the field of geotechnical engineering. Due to the complexity of foundation soil conditions, the current research on the mechanism of bearing characteristics of composite foundation is difficult to meet the requirements of actual engineering. Semi-empirical and semi-simplified quantification, because the piling and testing equipment can not meet the actual needs, resulting in uneven or broken piles of long piles, which seriously restricts the further development of composite foundation theory and practice. Contents of the invention [0003] Technical problem: The technical problem to be solved by the present invention is to propose a method for forming piles wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/36E02D33/00
CPCE02D5/36E02D33/00
Inventor 缪林昌陈艺南
Owner SOUTHEAST UNIV
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