Coarse-grained soil polymer slip casting triaxial test sample kit and using method thereof

Abstract

The invention discloses a coarse-grained soil polymer slip casting triaxial test sample kit and a using method thereof. The sample kit comprises a sample kit assembly and a compaction device, wherein the sample kit assembly comprises a split cavity and a base and a porous disc supporting the split cavity; the compaction device comprises a plastic sleeve, a compaction hammer and a compaction gasket positioned below the compaction hammer; one end of the plastic sleeve is inserted into a circular hole in the middle of the porous disc; the compaction device is used for compacting coarse-grained soil in the split cavity; a top cover is arranged above the compacted coarse-grained soil; the top cover is pressed on the split cavity through a pressing device. The using method of the sample kit comprises the steps of fixing the split cavity, compacting coarse-grained soil, immersing the sample kit and carrying out slip casting on polymer. The sample kit is compact in structure, the split cavity can be disassembled conveniently, the volume of the grout amount can be measured by the water discharge of a water tank, and whether the inside slip casting is complete is judged by combining the initial porosity of the sample. The using method of the sample kit is simple and convenient and easy to operate.

Description

technical field [0001] The invention relates to the technical field of civil and water conservancy engineering tests, in particular to a coarse-grained soil polymer grouting triaxial test sample preparation device and a use method thereof. Background technique [0002] With the development of the western region, a number of high earth-rock dams have been built in the southwest of my country. Due to the height of these dams and their large storage capacity, once they fail, they will bring disastrous consequences to the people downstream. As a new type of foundation treatment and reinforcement technology, polymer grouting technology has been widely used in many fields of geotechnical engineering. Prior to the present invention, "Patent: A Polymer Grouting Earth-rock Dam and Its Construction Method (Application No.: 201210007131.3)" disclosed a polymer grouting earth-rock dam, and this technology was introduced into high earth-rock dams for earthquake resistance. The static an...

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Problems solved by technology

[0003] Before the present invention, "Patent: A Grouting Test Sample Preparation Device (Application No.: 201020200285.0)" disclosed a grouting test sample preparation device, which uses an air compressor and a pneumatic grouting device, The sample preparation devices are connected separately, and the cylinder piston is used to apply pressure to the test sample preparation device, so as to simulate the chemical grouting process of different depth soil layers on site and prepare the test sample preparation device required in the laboratory. It is mainly suitable for deep loose soil ( Deep soil) The preparation of chemical grouting test sample preparation device is not suitable for the preparation of coarse-grained soil test sample preparation device, and the device of this invention is relatively complicated, the amount of grouting is not easy to control, and it is impossible to carry out coarse-grained soil test sample preparation. Cylindrical test prepper compaction, difficult to control test prepper uniformity and overall test prepper density

[0004] Before the present invention, "Patent: A Multifunctional Sample Preparation Applicable to Soil Triaxial Test (Application No.: 200820237840.X)" disclosed a multifunctional sample preparation device for triaxial testing. There is a threaded round hole on one side, which is used to fix the guide rod, so the conventional triaxial test cylinder sample and sand core cylinder sample can be prepared, but the preparation of the coarse-grained soil high polymer grouting test sample preparation device is not Not applicable

[0005] In addition, after the polymer grouting of the test sample preparation device, the bonding force between the polymer and the molding barrel is relatively large, and it is difficult to disassemble it by using a conventional split mold or an equal split mold.

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