Permeameter and determination method for determining permeability coefficient of saturated silt

Abstract

The invention relates to a permeameter and a determination method for determining the permeability coefficient of saturated silt. The permeameter comprises a cyclic load system, a permeation system and a suction filtration system. A cyclic load motor of the cyclic load system is connected with a piston in a cyclic load tank through a transmission rod, and the cyclic load tank is connected with a cyclic load tank water valve; an exhaust pipe is connected to an exhaust hole of the piston; a variable head pipe of the permeation system is connected with a sample column water valve through a variable head pipe water valve, a water supply tank is connected with the sample column water valve through a water supply tank water valve, and the sample column water valve is connected with a first end of a first connecting ring at the lower end; the second end of the first connecting ring is connected with the first end of the sample column at the lower end; the second end of the sample column is connected to the first end of the second connecting ring at the lower end; a first end of a vacuum suction filtration pipe of the suction filtration system is embedded into the cyclic load groove and connected to a second exhaust hole of the piston, and a second end of the vacuum suction filtration pipe is connected with the vacuum pump. According to the invention, dynamic measurement of the saturated silt permeability coefficient can be realized.

Description

technical field [0001] The invention relates to the field of seabed permeability measurement, in particular to an infiltration meter and a measurement method for measuring the permeability coefficient of saturated silt. Background technique [0002] Seabed permeability is one of the important parameters in marine engineering design and seabed stability evaluation. Its size determines the drainage conditions of seabed soil and affects seabed stability, soil pore pressure dissipation, consolidation rate, etc. , but the permeability of the seabed soil is not static, especially the saturated silt seabed near the mouth of the Yellow River in my country will be accompanied by the accumulation of excess pore pressure inside the soil under extreme storm conditions, and the effective stress will change, so that the soil particles in the water head The silt stratification occurs under the action of poor soil, which makes the seabed non-homogeneous, and then causes the permeability or pe...

AI Technical Summary

Problems solved by technology

For example, the conventional variable water head experiment has a simple structure and is easy to operate, but the permeability coefficient will change during the measurement, and there will be errors in the constant calculation method; the Terzaghi consolidation test, the measured data is relatively accurate, However, the consolidation coefficient will change during the consolidation test, so the permeability coefficient is also a variable, and there will be errors in the same calculation method using a constant

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