In-situ detecting device for measuring soil layer permeability coefficient

Abstract

The invention discloses an in-situ detecting device for measuring the soil layer permeability coefficient. The in-situ detecting device comprises a water inlet pipe, a flowmeter, a control center, an outer barrel, an outer barrel water injection pipe, an inner barrel and an inner barrel water injection pipe; the inner barrel is sleeved with the outer barrel, the inner barrel and the outer barrel are placed on undisturbed soil in a testing pit, the bottoms of the inner barrel and the outer barrel are provided with gravel or broken stone buffer layers, an inner barrel water level sensor is arranged on the inner wall of the inner barrel, and an outer barrel water level sensor is arranged on the inner wall of the outer barrel; the water inlet pipe is connected with the outer barrel water injection pipe and the inner barrel water injection pipe, and the outer barrel water injection pipe and the inner barrel water injection pipe are arranged in the outer barrel and the inner barrel correspondingly; an outer barrel electromagnetic switch valve is arranged on the outer barrel water injection pipe, and an inner barrel electromagnetic switch valve and the flowmeter are arranged in the inner barrel water injection pipe; and the control center is connected with the flowmeter, the outer barrel electromagnetic switch valve, the outer barrel water level sensor, the inner barrel electromagnetic switch valve and the inner barrel water level sensor and provides a power source and a control signal for the flowmeter, the outer barrel electromagnetic switch valve, the outer barrel water level sensor, the inner barrel electromagnetic switch valve and the inner barrel water level sensor. The in-situ detecting device has the beneficial effects of being high in measurement accuracy, good in stability, easy to operate, safe and reliable.

Description

technical field [0001] The invention relates to civil engineering detection equipment, in particular to an in-situ detection device for measuring the permeability coefficient of soil layers. Background technique [0002] At present, in civil engineering, the water injection test is usually used to determine the permeability coefficient of the soil layer. During the test, water needs to be injected into the test pit while maintaining a fixed head height, and the amount of water infiltrated into the soil layer is measured to determine the permeability coefficient. [0003] On-site technicians often directly connect the water tank to the pipeline, and use a stopwatch and a measuring stick to control. This primitive method has large errors in water level control, time control and water volume calculation, and cannot guarantee the accuracy of the test. It affects the accurate determination of the soil permeability coefficient by engineers and technicians. Contents of the invent...

AI Technical Summary

Problems solved by technology

[0003] On-site technicians often directly connect the water tank to the pipeline, and use a stopwatch and measuring ruler to control. This primitive method has large errors in water level control, time control and water volume calculation, and cannot guarantee the accuracy of the test.

Affects engineers and technicians' accurate determination of soil permeability coefficient

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