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Device for determining permeability coefficient of coarse-grained soil with super large grain size

A technology of permeability coefficient and measuring device, applied in the field of parameter measuring device of hydraulic engineering materials, can solve the problems of difficult exhaust saturation, large sample diameter, etc.

Inactive Publication Date: 2015-01-21
YELLOW RIVER INST OF HYDRAULIC RES YELLOW RIVER CONSERVANCY COMMISSION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The inventor designed a special test instrument through the research of the previous equipment and the analysis of the characteristics of the coarse-grained soil with super large particle size selected in the existing project, and designed a large number of pressure measuring vents on the outside of the test cylinder wall to solve the problem of the test. The sample diameter is large, and it is difficult to exhaust and saturate the test problem, so that the test instrument can test the permeability characteristics of coarse-grained soil with a super-large particle size of d85≥60mm

Method used

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  • Device for determining permeability coefficient of coarse-grained soil with super large grain size
  • Device for determining permeability coefficient of coarse-grained soil with super large grain size
  • Device for determining permeability coefficient of coarse-grained soil with super large grain size

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Embodiment Construction

[0068] Such as figure 1 As shown, a super large particle size coarse-grained soil permeability measurement device includes a test cylinder, an automatic pressurization system 11 and a pressure measuring tube 12. The test cylinder is composed of a base support 1, a buffer material container 2, a cylinder body 6 and an upper cover 8 components, wherein, the buffer material container 2 is supported on the upper part of the base bracket 1, the side wall of the buffer material container 2 is provided with a lower exhaust hole 3, and the lower part is provided with a lower water outlet 4; the upper part of the buffer material container 2 It is connected with the cylinder body 6 through sealing bolts 5, and a plurality of cylinder wall pressure measurement and exhaust holes 7 are arranged on the cylinder body 6, and each of the cylinder wall pressure measurement and exhaust holes 7 is provided with a valve; the cylinder wall The upper part of the body 6 is connected with the upper co...

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Abstract

The invention relates to a device and a method for determining parameters of a hydraulic engineering material and particularly relates to a device and a method for determining the permeability characteristic of coarse-grained soil with super large grain size (the d85 is larger than or equal to 60mm and smaller than or equal to100mm), and the IPC (International Patent Classification) codes of the device and the method are respectively E02D1 / 04 and E02D33 / 00. The device comprises a testing drum, an automatic compression system 11 and a pressure determining tube 12, wherein a plurality of pressure determining holes are formed in the wall of the testing drum, the pressure determining holes in the wall of the testing drum can be used as air discharge holes when air is discharged out of soil body from saturation, and the pressure determining holes and air discharge holes in the drum top and the drum bottom jointly accelerate air discharge, so that a sample can be saturated rapidly. Proven by a large number of experiments, the method has the advantages that hot water at the temperature of 25-40 DEG C is used, the sample with super large grain size cab be saturated rapidly and the influences on the chemical and physical stability of the sample are minimized.

Description

Technical field: [0001] The present invention relates to a parameter measuring device and method for water conservancy engineering materials, in particular to a device and method for measuring super-large-sized coarse-grained soil materials (particle size 60mm≤d) selected in engineering. 85 ≤100mm) to measure the device and method of permeability characteristics, its IPC international patent classification number is E02D1 / 04 and E02D33 / 00. Background technique: [0002] In the construction of water conservancy, transportation, railway and other projects, coarse-grained soil is often used as the basic material. Coarse-grained soil According to the "Soil Classification Standard" (GBJ145-90), coarse-grained soil refers to particles with a particle size greater than 0.075mm and less than 60mm. [0003] In water conservancy projects, coarse-grained soil is often used as dam foundation and embankment foundation materials; in railway and highway projects, it is often used as roadb...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/08
Inventor 沈细中张俊霞兰雁张敏
Owner YELLOW RIVER INST OF HYDRAULIC RES YELLOW RIVER CONSERVANCY COMMISSION
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