Cement paste concentration real-time regulation and control device for cement-soil mixing pile and use method thereof

Abstract

The invention discloses a cement paste concentration real-time regulation and control device for a cement-soil mixing pile and a use method of the cement paste concentration real-time regulation and control device. The device comprises a paste feeding pump, a three-way joint, a variable frequency water pump, a paste feeding hose, a cement-soil mixing pile machine, a monitoring host, a pile machinecontrol cabinet and a current sensor. The method comprises the following steps: analyzing and summarizing a corresponding relation between current and soil layers according to geological explorationdata of a construction site and local construction experience before use, determining a cement mixing amount required by each soil layer to reach design strength, and inputting the cement mixing amount into a current analysis program; after confirming that the device can normally operate through pile testing debugging, starting a pile driver for construction; and during construction, always keeping the device in a power-on state until the construction is finished. The concentration of the cement paste is adjusted according to the hardness of the actual soil layer, so that the cement paste withhigher concentration is sprayed to the soft soil layer, the cement paste with lower concentration is sprayed to the hard soil layer, the cement soil strength of the soft soil layer and the construction efficiency of the hard soil layer are improved, and the application effect of the cement-soil mixing pile composite foundation is improved.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to a real-time control device for cement slurry concentration of a cement-soil mixing pile and an application method thereof. Background technique [0002] Cement-soil mixing pile technology is a soft soil foundation reinforcement method widely used at home and abroad. Its principle is to spray slurry into the soil layer while drilling through a special deep-layer mixing machine, and force the soft soil and curing agent to stir on the spot. A series of physical-chemical interactions between the curing agent and the soft soil form a cement-soil column with high strength, integrity, and good water stability. In engineering practice, most of the soil layers of the site to be treated are distributed in layers, and the soil layers are uneven in hardness. Weak soil layers usually have a high water content, and to achieve the purpose of reinforcement, more cement slurry i...

AI Technical Summary

Problems solved by technology

[0003] The currently used cement-soil mixing piles rely entirely on manual control for construction. Operators cannot perceive changes in the softness and hardness of the soil layer on the pile driver, and cannot judge the actual situation of the softness and hardness of the soil layer when the pile driver is drilling.

In addition, the cement slurry used in the construction of cement-soil mixing piles is mixed in batches according to the water-cement ratio required by the design. Even if the operator judges the change of the soil layer through construction experience and ammeter, the concentration of the cement slurry cannot be adjusted immediately.

Therefore, in the construction of cement-soil mixing piles, the strength of cement-soil in soft soil layers cannot be guaranteed, the drilling in hard soil layers is not smooth, and cement waste is serious.

Images