Riverbed permeability coefficient testing device

A testing device and permeability coefficient technology, applied in measurement devices, sampling devices, permeability/surface area analysis, etc., can solve the problems of difficult sampling, low sampling efficiency, and easy to be disturbed by the field environment.

Pending Publication Date: 2020-05-15
INST OF HYDROGEOLOGY & ENVIRONMENTAL GEOLOGY CHINESE ACAD OF GEOLOGICAL SCI
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Problems solved by technology

[0005] The purpose of the present invention is to provide a river bed permeability coefficient test device to solve the problems of difficult samplin

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  • Riverbed permeability coefficient testing device
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  • Riverbed permeability coefficient testing device

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[0038] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and not to limit the present invention.

[0039] In the present invention, if no explanation is made to the contrary, the orientation words used such as "up, down, top, bottom" usually refer to the attached figure 1 The orientation shown. "Inside and outside" refers to the inside and outside relative to the contour of each component itself.

[0040] The invention provides a device for testing permeability coefficient of a riverbed, which includes:

[0041] A sampling unit, the sampling unit includes a sampling tube 1 and a piston assembly. The bottom end of the sampling tube 1 is open to allow riverbed soil samples to enter the sampling tube 1, and the piston assembly is detachably sealed and inserted in The sampling...

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Abstract

The invention relates to the technical field of hydraulic engineering, and discloses a riverbed permeability coefficient testing device. The device comprises a sampling unit and a leakage unit, the sampling unit comprises a sampling pipe and a piston assembly; the bottom end of the sampling pipe is open, so that a riverbed soil sample enters the sampling pipe; the piston assembly is detachably inserted into the sampling pipe in a sealed mode and can reciprocate in the axial direction of the sampling pipe relative to the sampling pipe, the sampling unit further comprises a bottom end cover detachably arranged at the bottom end of the sampling pipe in a covering mode, and the bottom end cover is arranged to allow water to pass and prevent a riverbed soil sample from passing; the leakage unitcomprises a water seepage barrel, and the water seepage barrel is arranged to allow the sampling unit to be vertically inserted for a penetration test. The riverbed undisturbed soil sample can be conveniently and rapidly collected through the sampling unit, the sampling efficiency is greatly improved, interference of river water flow can be eliminated through the seepage unit for a seepage test,the flexibility and operability of the test are improved, and the test efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of water conservancy engineering, in particular to a river bed permeability coefficient testing device. Background technique [0002] The methods for obtaining the river bed permeability coefficient in the field mainly include micro-water test method, pumping test method, water seepage meter method and water head drop standpipe test method, etc. Compared with other methods, the standpipe method uses less material, is lower in cost, and is easier to operate, so it is widely used in the determination of field river bed conductivity. The traditional standpipe method is to drive a single pipe (steel pipe, plexiglass pipe, etc.) of a certain length and diameter into a certain depth below the river bed, inject water into the pipe, and measure the descending rate of the water in the pipe to calculate the permeability coefficient of the river bed. [0003] Although the standpipe method has become a relatively matur...

Claims

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Application Information

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IPC IPC(8): G01N15/08G01N1/14
CPCG01N1/14G01N15/0826
Inventor 蔡子昭徐流洋
Owner INST OF HYDROGEOLOGY & ENVIRONMENTAL GEOLOGY CHINESE ACAD OF GEOLOGICAL SCI
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