Pile forming Equipment and method for modulus controlled plain concrete pile

Abstract

The invention discloses pile forming Equipment and method for a modulus controlled plain concrete pile. A built-in split semi-circle valve is adopted by the end part of a drill bit of the equipment, and when a triggering force is applied to concrete slurry, the split semi-circle valve is automatically opened. A pressure sensor is arranged on the side face of the drill bit, and is connected with adigital converter and then connected with a drilling machine control panel, so that the pressure of concrete in a drill rod is controlled to be gradually increased or gradually reduced to be equal tothe pressure phase of the sensor in real time. When the drill bit is drilled to the designed depth, drilling is stopped, the drill bit is lifted, the triggering force is applied to concrete grout in aconveying pipe, the valve at the bottom end of the drill bit is automatically opened, and the drilling rod is uniformly lifted while the concrete is pressed into a drilling hole until the ground elevation is reached, and the pile forming is completed. According to the method, the pile forming uniformity and the pile forming quality of a long pile of the modulus controlled plain concrete pile areguaranteed.

Description

technical field [0001] The invention relates to a control modulus plain concrete pile forming equipment and method, belonging to the field of foundation engineering composite foundation. Background technique [0002] Composite foundation is the most widely used soft soil foundation 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, and can only be semi-empirical and semi-experienced. Simplified quantification, because the pile-forming equipment can not meet the actual needs, resulting in uneven or broken piles of long piles, which seriously restricts the in-depth development of composite foundation theory and practice. In addition, the early patent application document of the inventor's research group "control modulus pile forming equipment and pile forming method" (CN101435209A) is a...

AI Technical Summary

Problems solved by technology

The problems brought about in this way: First, there is basically no gap between the surrounding soil layer and the drill bit after the hole is formed, and blockage often occurs, and the concrete spraying is not smooth, which affects the quality of the pile; Slower and lower work efficiency; three is limited by the small hole diameter of the side openings, and the concrete slurry has strict requirements on the particle size of the stones, which brings inconvenience to the selection of factory-mixed concrete materials and affects the strength of the concrete

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