Construction technology and equipment for cement mixing pile

Abstract

The invention discloses a construction technology and equipment for a cement mixing pile. The construction technology comprises the steps that when the hollow pile section is constructed, clear water is ejected from a grout ejecting opening, the clear water is also ejected by the grout ejecting opening in the first sinking process of the solid pile section, a mixing head is lifted and sunk for many times in the lifting process of the solid pile section, and cement grout is ejected from the grout ejecting opening. According to the construction technology for the cement mixing pile, the cement is distributed in the solid pile section uniformly, and the cement grout is combined with soil body in the solid pile section, so that the pile forming quality of the solid pile section is guaranteed, waste of the cement grout is avoided, and follow-up digging work of the hollow pile section is convenient.

Description

technical field [0001] The invention relates to a construction technique of cement mixing piles and equipment used for constructing cement mixing piles. Background technique [0002] The use of cement mixing piles for foundation treatment is a common foundation treatment method for weak foundations in coastal areas, the Pearl River Delta, and the Yangtze River Delta. At present, only one set of cement slurry delivery system is installed on the construction site of cement mixing piles. During the construction of cement mixing piles, the cement slurry delivery system sprays grout all the way from the sinking of the mixer from the ground to the completion of single pile construction. Due to the existence of the underground pressure at the grouting port, the deeper the ground is, the greater the underground pressure is, so as the agitator sinks, the spraying pressure difference of the slurry delivery system will become smaller and smaller, resulting in starting from the ground, ...

AI Technical Summary

Problems solved by technology

Due to the existence of the underground pressure at the grouting port, the deeper the ground is, the greater the underground pressure is, so as the agitator sinks, the spraying pressure difference of the slurry delivery system will become smaller and smaller, resulting in starting from the ground, The lower the amount of sprayed grout per unit length of the pile section, the less the amount of sprayed grout, the worse the quality of the pile

Therefore, the cement mixing pile formed by the above construction method has the best pile quality in the uppermost empty pile section, while the pile quality of the solid pile section is poor

The construction technology of the above-mentioned cement mixing pile has the following defects: 1. Part of the cement slurry is sprayed in the empty pile soil layer, resulting in insufficient spraying of the solid pile section and poor pile quality; at the same time, the cement sprayed in the empty pile section Slurry also creates waste

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