Evaluation device and evaluation method for setting quality of cement paste for engineering grouting

Abstract

The invention relates to an evaluation device and evaluation method for setting the quality of cement paste for engineering grouting, and the device at least comprises: a sealed kettle body which is provided with a pressure cavity for accommodating cement paste, wherein the top and the side surface of the pressure cavity are respectively connected with at least one pressure chamber; a heating unit which is used for providing heat energy for the sealed kettle body, wherein a pressure chamber at the top of the reaction kettle body is communicated with an input pipeline used for injecting pressurized fluid into the pressure chamber, the side face of the reaction kettle body is connected with a plurality of input pipelines, at least one input pipeline extending into cement paste is configured to be a first measuring pipe, at least another input pipeline extending into the pressure chamber on the side surface of the sealed kettle body is configured as a second measuring pipe, and at least part of the sealed kettle body is configured as a visible first window and a visible second window respectively corresponding to the first measuring pipe and the second measuring pipe. The invention further relates to an evaluation method for the setting quality of the cement paste for engineering grouting.

Description

technical field [0001] The invention relates to the technical field of cement slurry coagulation quality monitoring, in particular to a cement slurry coagulation quality evaluation device and evaluation method for engineering grouting. Background technique [0002] Engineering grouting refers to the injection of certain curable grout configured in a certain proportion into the cracks or pores of rock and soil foundations by appropriate methods, and the purpose of improving its physical and mechanical properties is achieved by means of replacement, filling, extrusion, etc. method. The grouting technology can be used for secondary grouting of wall piles and cables in earthquake disasters, as well as post-pile grouting during underground engineering construction, anti-seepage grouting during subway tunnel construction, or cement sheath after well cementing. And secondary grouting between formations, etc. Among many construction projects involving grouting technology, the sett...

AI Technical Summary

Problems solved by technology

The existing indoor method for testing cement gel strength is simple and easy, but there are still the following problems: (1) The stratum environment that can be simulated is relatively limited, especially the lack of simulation methods for in-situ strata and low temperature, so the experimental process The data is not comprehensive enough and lacks convincingness, so it cannot accurately and effectively provide practical guidance for on-site construction; (2) The experimental process is usually invisible, so it is often not accurate enough to know the strength value of cement slurry only by instrument readings , and ignores the microscopic state changes of the cement slurry in each setting period, so the final evaluation of the setting quality of the cement slurry is not accurate enough; (3) There are almost no real-time measurement devices, and most of them can only obtain the The final evaluation result of the strength, but it is impossible to detect the corresponding gel strength and its change strength at any hydration time of the cement slurry

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