A construction method of high-pressure rotary spraying based on return slurry data

Abstract

The invention discloses a construction method for high-pressure rotary spraying based on slurry return data, which belongs to the technical field of construction engineering. The equipment required to realize the above method includes a cement slurry viscometer, a cement slurry mixing system, a slurry return flowmeter, and a slurry return flowmeter. Drainage tank, filter press system, data analysis system, rotary jet drilling rig, geological drilling rig, console of rotary jet drilling rig, rotary jet pump, high-pressure pump; the key construction steps are as follows: introduction hole construction; installation of return slurry flow meter and cement slurry viscosity meter ; Start rotary grouting construction; dynamic adjustment of construction parameters; rotary grouting return slurry treatment; complete rotary grouting pile construction. The present invention uses the variation of the return slurry viscosity caused by the different mixing degrees of cement and soil in the return slurry, and then relies on the viscosity parameters to determine the quality of the rotary spraying, and then adjusts the construction parameters, thereby realizing the mechanization and intelligence of construction, liberating the labor force, reducing the Construction costs.

Description

technical field [0001] The invention relates to the technical field of building engineering construction, in particular to a construction method for high-pressure rotary spraying based on slurry return data. Background technique [0002] The high-pressure rotary grouting construction technology uses a rotating nozzle to spray high-speed fluid while cutting the soil while mixing the cement slurry with the chopped soil. After a chemical reaction, a solid reinforced soil column is formed, and the strength can reach more than several MPa. This construction method was invented by Dr. Nakanishi from NIT in Japan. It was originally a simple single-pipe method (also known as CCP construction method), and later developed double-pipe method and triple-pipe method. The single-pipe method only sprays cement slurry; the double-pipe method uses compressed air to coaxially wrap the high-pressure cement slurry to cut the soil and mix the two with each other, so that the diameter of the rein...

AI Technical Summary

Problems solved by technology

Drilling and coring is the most direct and widely used detection method. It belongs to the posterior method. The problem is that even if the pile diameter is found to be too small, it is difficult to take remedial measures; if the pile diameter is found to be too large, it is impossible to compensate for the material waste of

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