Grouting plug for two-fluid process

Abstract

The invention discloses a grouting plug for a two-fluid process. The grouting plug comprises a slurry inlet pipe. An expansion pipe is arranged in the middle of the slurry inlet pipe and sleeves the outer side of the slurry inlet pipe, a slurry inlet pipe head is arranged on the expansion pipe and is communicated with the expansion pipe, a slurry return pipe is arranged on a side surface of the slurry inlet pipe, is of a T-shaped structure and is integrally connected with the expansion pipe, an end of the slurry return pipe is connected with a circular pipe ball plug, the circular pipe ball plug is fixedly connected with the outer side of the slurry return pipe by a hoop, a pipe core is arranged on a side surface of the slurry inlet pipe, one end of the pipe core is connected with the slurry inlet pipe by a return spring, a slurry overflow opening is connected to the other end of the pipe core and is communicated with the pipe core, sealing steel rings are arranged on the upper side surface and the lower side surface of the pipe core and sleeve the pipe core, and a stuffing pipe joint is arranged in the pipe core. The grouting plug for the two-fluid process has the advantages that the grouting plug can be widely used for pure-pressure grouting and circulation grouting in holes, and water can be freely discharged in the grouting holes, so that a plug body is free of head pressures, the plug can be lifted smoothly, dispersion of cement slurry can be effectively controlled, and the re-grouting frequency can be obviously reduced.

Description

technical field [0001] The invention relates to a grouting plug, in particular to a two-liquid method grouting plug. Background technique [0002] In-hole circulating grouting plugs have been widely used in hydraulic foundation treatment grouting construction, and in most building foundations, hydropower and hydraulic engineering dam foundation treatment grouting plugs have been widely used. In addition, during the construction of the hydropower station, it is located in an alpine region with a relatively high altitude, and there are two problems: 1. The geological conditions are complex, the rock mass in the curtain grouting area is broken, the geological rock mass is too wide, and the cracks are penetrated. During the construction process, there are many times of refilling, and the slurry consumption is large; second, the ambient temperature is low in winter, and the slurry coagulates for a long time, which cannot be completed normally, which seriously affects the construc...

AI Technical Summary

Problems solved by technology

Moreover, during the construction of the hydropower station, located in an alpine region and under relatively high altitude environmental conditions, there are two problems as follows: 1. The geological conditions are complex, the rock mass in the curtain grouting area is broken, the geological rock mass is too wide, and the cracks are penetrated. During the construction process, there are many times of refilling, and the amount of slurry consumption is large; 2. The ambient temperature is low in winter, and the slurry coagulation time is long, which cannot be completed normally, which seriously affects the construction progress

If the fluidity of the grout decreases rapidly, it is easy to block the pipeline, and the pressure cannot be increased during the grouting process, which will cause construction safety and quality risks

Images