Positioning frame for pcmw construction method

Abstract

The invention discloses a positioning rack for a PCMW construction method. The positioning rack comprises a rack and is characterized in that a guide cylinder is arranged on the rack, a plurality of clamping mechanisms are arranged in the guide cylinder, each clamping mechanism comprises an arc-shaped clamping plate, a clamping spring and a guide wheel, each clamping spring is arranged between thecorresponding clamping plate and the guide cylinder, and each guide wheel is arranged on the surface, away from the corresponding clamping spring, of the corresponding guide wheel. The positioning rack has the advantages that the guide cylinder guides a PHC tubular pile to guarantee the perpendicularity of the PHC tubular pile when the PHC tubular pile is inserted into cement so as to guarantee construction precision and increase construction quality; during the sliding of the PHC tubular pile, the clamping plates constantly clamp the PHC tubular pile by the aid of the clamping springs, a gap, which allows the PHC tubular pile to shake in the guide cylinder, between the PHC tubular pile and the guide cylinder is prevented, and precision can be prevented from being affected by the shaking;the guide wheels reduce friction force between the PHC tubular pile and the clamping plates to facilitate the insertion of the PHC tubular pile.

Description

technical field [0001] The invention relates to the field of foundation engineering, in particular to a positioning frame for a PCMW construction method. Background technique [0002] The PCMW construction method is to insert prestressed pipe piles into the cement mixing soil to form a composite support structure of prestressed pipe piles and cement-soil walls. The soil body is cut to the design depth through the drill bit of the multi-axis deep layer mixer, and the cement slurry is injected from the front end of the drill bit. soil and mix with the soil repeatedly. In order to make the cement-soil mixture more uniform and liquefied, a high-pressure airflow is added to the drill bit to sweep the soil layer. PHC pipe piles are inserted before the prepared cement soil is hardened to form a series of rows of pile-type underground diaphragm walls, and finally form the lateral support structure of the deep foundation pit. [0003] When inserting the PHC pipe pile, the top of th...

AI Technical Summary

Problems solved by technology

[0003] When inserting the PHC pipe pile, the top of the PHC pipe pile is usually lifted by a crane, and then the PHC pipe pile is inserted into the cement soil. , only the upper end of the PHC pipe pile is connected to the crane, and the lower end of the PHC pipe pile will shake freely, so when the PHC pipe pile is inserted, the PHC pipe pile is easy to tilt, the construction accuracy is low, and the construction quality is poor

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