A kind of monomolecular high polymer rockfill material triaxial sample preparation equipment and using method

Abstract

The invention discloses single-molecule high polymer and rockfill material three-axis sample preparation equipment and an application method. The equipment comprises a vacuum saturation cylinder and a base located in the vacuum saturation cylinder; a split mold is mounted on the base; a fixing sleeve is mounted at the top of the split mold; the fixing sleeve is fixed at the top of the split mold through a connecting rod; a lower permeable stone, and a rockfill material and a single-molecule high polymer, which are loaded by layers, are arranged on an inner wall of the split mold; a compacting device for impacting the rockfill material and the single-molecule high polymer is mounted in the split mold; second filter paper and a geotextile cover are arranged on the inner wall of the split mold; a water through hole is formed in the base. In a testing sample preparation process, the second filter paper and the geotextile cover are arranged at the inner side of the split mold and can be used for effectively preventing from a condition that high polymer and water have a chemical reaction and then penetrate into a mold formed in the inner side of the split mold so that a test sample is difficult to detach and the content of the high polymer in the test sample is changed.

Description

technical field [0001] The invention relates to a monomolecular high polymer rockfill material triaxial sample preparation device and a use method thereof, belonging to the technical field of civil and water conservancy engineering tests. Background technique [0002] With the progress of the western development, a number of high earth-rock dams have been built in the southwest of my country. Because of the high dams, ensuring their safety is the most important thing, so the reinforcement of the dam body is an important measure. Polymers have high strength, light weight, good expansibility, and cohesive force, and have been widely used in many fields of geotechnical engineering. The static and dynamic characteristics of polymers added to rockfill materials are the prerequisites for evaluating the seismic stability of earth-rockfill dams after polymer grouting. At present, there are few studies on the static and dynamic characteristics of polymer grouted rockfill materials, s...

AI Technical Summary

Problems solved by technology

[0003] In the conventional triaxial sample preparation process, three open molds or split molds are generally used. In order to reduce the friction between the mold and the sample, Vaseline is usually applied on the inner wall of the mold. This method is not suitable for the preparation of high polymer grouting rockfill materials. , the cohesion between the polymer and the molding barrel is relatively large, and it is difficult to disassemble with conventional molds

[0004] Prior to the present invention, "Patent ZL201410069835.2: Coarse-grained Soil High Polymer Grouting Triaxial Test Sample Maker and Its Application Method" disclosed a rockfill material high polymer grouting triaxial test sample maker. The split mold of the sample container is in direct contact with the sample added with polymer. Although the inner wall is coated with vaseline, the split mold will still be bonded to the sample when the sample is removed.

In addition, since the polymer and the rockfill material cannot be completely and uniformly mixed, it is inevitable that particles will fall from the outside of the sample after the sample is removed, which will damage the sample

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