Constant pressure grouting device and intelligent constant pressure grouting method for precise control of grouting pressure

Abstract

The invention discloses a constant-pressure grouting device and an intelligent constant-pressure grouting method for precisely controlling the grouting pressure. The constant-pressure grouting device includes an air supply source assembly, a grout storage tank, an intelligent digital display pressure switch, a relay switch and an electric air pressure switch ;The gas outlet of the gas source assembly is in fluid communication with the gas inlet of the slurry storage tank, the air inlet of the intelligent digital display pressure switch is in fluid communication with the gas fluid above the slurry in the slurry storage tank, and the control current of the intelligent digital display pressure switch The output end is electrically connected to the control current input end of the relay switch, the control current output end of the relay switch is electrically connected to the control current input end of the electro-pneumatic switch, and the air inlet of the electro-pneumatic switch is connected to the gas fluid on the slurry in the storage tank. Through, the air outlet of the electro-pneumatic switch is in fluid communication with the external environment. The invention can intelligently control the constant pressure grouting pressure in real time and improve the stability of the constant pressure grouting.

Description

technical field [0001] The invention relates to the technical field of constant pressure grouting. Specifically, it is a constant-pressure grouting device for precisely controlling the grouting pressure and an intelligent constant-pressure grouting method. Background technique [0002] Grouting technology has the characteristics of time-saving, labor-saving, high efficiency, short construction period, and convenient construction. Grouting technology has been widely used in many engineering fields, involving almost all civil engineering and geotechnical engineering fields. At present, there are: constant flow grouting and constant pressure grouting in the grouting project. In the constant flow grouting process, the grouting pressure fluctuates in a large range, and the damage to the injected medium cannot be controlled. In constant pressure grouting, the grouting pressure fluctuation range is small, and the effect on the injected medium can be controlled, which has a greater...

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Problems solved by technology

[0005] 1) There is no barometer device installed to monitor the gas pressure inside the pulp storage tank. There is only a mechanical pressure relief valve on the upper part of the pulp storage tank to control the intake pressure, but the air pressure value entering the pulp storage tank is not measured;

[0006] 2) When the pressure of the pulp storage tank is higher than expected, there is no discharge treatment device, and the pressure of the pulp storage tank may be higher than the set constant pressure value. The constant pressure device uses a mechanical pressure reducing valve to set the pressure of the pulp storage tank, and the pressure is reduced The valve device is a one-way gas control switch, which can only realize the adjustment from high air pressure to low air pressure, but not vice versa; in other words, when the internal pressure of the slurry storage device is higher than the expected constant pressure value due to improper operation or other objective reasons , the gas in the device cannot be refluxed and discharged, causing the grouting pressure to be higher than the predetermined value

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