Detailed description:

The purpose of geotechnical testing instruments:

Before carrying out infrastructure planning and construction, the geotechnical industry needs to conduct tests on the properties of building foundation soil and rock. The tests are usually conducted in indoor laboratories, and the mechanical properties of the soil are tested, which is called geotechnical testing. The vessels and tools used in geotechnical testing are called geotechnical testing instruments.

Introduction to geotechnical testing instruments:

(1) Physical property tests of soil: including moisture content, density, specific gravity, liquid limit, plastic limit, particle analysis, relative density test, etc.

(2) Soil water physical property tests: including permeability tests, wetting tests, etc.

(3) Mechanical property tests of soil (static): including consolidation test, determination of pre consolidation pressure, determination of consolidation coefficient, box type direct shear test, unconfined compressive strength test, triaxial shear test, K0 test, angle of repose, compaction test, static elastic modulus test, etc.

(4) Indoor tests for the dynamic properties of soil include dynamic triaxial tests, resonant column tests, hollow cylinder tests, shaking table tests, dynamic single shear tests, etc.

The types of geotechnical testing instruments include:

(1) Static triaxial apparatus

(2) Dynamic triaxial apparatus

(3) Large three-axis instrument

(4) True triaxial apparatus

(5) Combustible ice triaxial apparatus

(6) Unsaturated soil testing instrument

(7) Hollow cylinder system

(8) Resonant column

(9) Consolidation instrument

(10) Shear testing instrument