What Is Earth Pressure?

Soil pressure sensor is a sensor for soil pressure measurement in soil mechanics theory research and engineering test.

Soil pressure measurement is an important work in soil mechanics theoretical research and engineering testing. The soil pressure sensor can be used to obtain the contact stress between the surface of structures such as subgrades, retaining walls, dams and roads and the soil medium and the original state of the soil layer. State to verify the theory of soil stress distribution.

The earth pressure sensor has more than 70 years of research history in the world, and domestic research work in this area began in the early 1960s. However, China is still in the research and development and trial production stage, and the production capacity of commodities has not yet formed. One of the reasons is that the mechanism research and engineering application technology are constantly being explored. The soil layer is a heterogeneous, loose solid-liquid-gas three-phase medium. Compared with the fluid medium, the shell has different force transmission characteristics ^[1]

The elastic body is a peripherally fixed sun-shaped plate. The thin plate generates warp and tangential strain under the effect of oil pressure. The strain gage is adhered at an appropriate position and a differential Wheatstone bridge is formed. The excitation power can be output and output. Electric signal with earth pressure in a linear relationship ^[2]

It is used to measure the stress in the soil of airport runways, railway embankments, highway subgrades and earth and rock dam foundations, and to measure the earth pressure on underground oil, gas, water pipelines and protective engineering, subways, tunnels and other underground buildings; to measure large high-rise buildings, chimneys And other basic reaction forces; measure excavation supports, retaining walls, non-slip columns. Earth pressure on anti-skid banks, bank revetments, wharf walls, ship locks, bridge piers, etc., and dynamic and static pressure on formwork during concrete infusion.