Preparation device and application method of triaxial test sample provided with structure in contact with soil

Abstract

The invention discloses a preparation device of a triaxial test sample provided with a structure in contact with soil. The preparation device comprises a test sample base, a rubber diaphragm, a split die and a cylinder, wherein the diameter of the cylinder is the same as that of the triaxial test sample, a narrow groove is formed at one end of the cylinder, and width and height of the narrow groove are completely consistent with those of the structure to be simulated. According to the invention, soil body nearby the contact surface is uniformly compacted, and the rubber diaphragm can be effectively prevented from being damaged during the preparation of the test sample, so that preparation quality of the test sample is ensured, and working efficiency is obviously increased.

Description

technical field [0001] The invention relates to a sample preparation device for triaxial test of contact between soil and structure and its application method. Background technique [0002] With the in-depth development of water conservancy and hydropower projects in Southwest my country, more 200-300-level high earth-rock dams are being built. For such high earth-rock dams, the contact surface between soil and structures is usually the weakest position in the dam, such as Improper design often leads to dam failure, causing serious flood disasters and heavy economic losses to downstream cities. Carrying out the triaxial test of the soil-structure contact surface is an important means to study the mechanical properties and impermeability characteristics of the soil-structure contact surface, and to evaluate whether the design is safe or not, and the preparation of soil-structure contact triaxial samples that meet the test requirements is an important method. The basis for ob...

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Problems solved by technology

[0002] With the in-depth development of water conservancy and hydropower projects in Southwest my country, more 200-300-level high earth-rock dams are being built. For such high earth-rock dams, the contact surface between soil and structures is usually the weakest position in the dam, such as Improper design often leads to dam failure, causing serious flood disasters and heavy economic losses in downstream cities

Carrying out the triaxial test of the soil-structure contact surface is an important means to study the mechanical properties and impermeability characteristics of the soil-structure contact surface, and to evaluate whether the design is safe or not, and the preparation of soil-structure contact triaxial test specimens that meet the test requirements is an important method. The basis for obtaining reliable test results, but when preparing such samples, there are often the following difficulties: (1) The soil near the contact surface cannot be compacted uniformly and effectively, and the contact surface is artificially made weaker, which seriously affects the reliability of the test results ; (2) The rubber membrane is often punctured by the compaction tool, and the sample needs to be prepared again, which seriously affects the work efficiency

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