Land and Water Group Holdings Corporation

Laboratory test (soil and rock tests)

Hybrid triaxial test equipment

Laboratory test, which plays a part in geological surveys, consists of high-precision element testing of ground materials. Various types of indoor tests are conducted in the soil mechanics laboratory of our in-house lab. With the aim of being a consulting laboratory, our soil mechanics lab proposes appropriate testing methods and provides optimal geotechnical values.

Soil testing

Soil test The strength of soil changes depending on the type of soil and sediment environment. Therefore, triaxial compression tests and consolidation tests are conducted to investigate the properties of soil, according to design and construction conditions. Liquefaction strength tests and cyclical deformation tests are also conducted to understand the characteristics of earthquakes and vibration, as well as the dynamic properties of the ground. We also have hybrid triaxial test equipment on which a residual strength test (static compression) can be conducted after a liquefaction strength test (cyclical loading) in a single session, as well as indoor testing equipment (manufactured through technical cooperation with the University of Tokyo) to determine the shear wave velocity of soil sampled using bender elements.

Bender element

Rock test

In the design and construction work for tunnel excavations and slope control measures, rock testing is used to uncover the strength and deformation properties of various rock types. In addition, in order to predict vibration characteristics for deep earthquakes, we also conduct cyclical deformation tests under high load and high confining pressure conditions.

Rock test equipment