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A Combined Measuring Instrument for Consolidation and Permeability of Soil Water-Air Collapse

A technology of measuring instrument and permeameter, which is applied in the field of soil water-air moisture subsidence consolidation and infiltration joint measuring instrument, can solve the problems of laborious cost, high cost, high cost, etc., and achieve improved flexibility, large pressure range, and avoid artificial effect of error

Inactive Publication Date: 2018-07-20
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current indoor secondary collapsibility tests all need to take samples after the on-site presoaking water is stabilized, and then measure the secondary collapsibility deformation index, which is time-consuming, laborious and expensive
At present, most loess collapsibility tests and consolidation tests are carried out with ordinary single-lever consolidation instruments, which is not only time-consuming, laborious, and costly, but also cannot be carried out under the condition of avoiding secondary human disturbances. "test and determination of air permeability coefficient

Method used

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  • A Combined Measuring Instrument for Consolidation and Permeability of Soil Water-Air Collapse
  • A Combined Measuring Instrument for Consolidation and Permeability of Soil Water-Air Collapse
  • A Combined Measuring Instrument for Consolidation and Permeability of Soil Water-Air Collapse

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] combine figure 1 , figure 2 , the consolidation process of the present invention's combined soil water-gas consolidation and permeability tester is:

[0053] Step 1, according to the provisions of the geotechnical test regulations SL237-002-1999, cut the undisturbed soil sample 10 or prepare the disturbed soil sample 10 with a given density and moisture content;

[0054] Step 2, place the lower permeable stone 9 with the permeable stone bushing installed, filter paper, lay the O-ring and the rubber pad 4 on the base, and put the ring knife 7 prepared and cut according to the geotechnical experiment regulations into the sample sleeve 5 In the middle, place the filter paper and the upper permeable stone 11 again, spread the rubber pad 4 above the sample cover seat 5, buckle the pressurization system (cylinder 13, piston 12), and fix it with the flange 3;

[0055] Step 3: Connect the first pipe interface 2-1 of the air pressure and subsidence consolidation permeameter, ...

Embodiment 2

[0079] combine figure 1 , figure 2 , Figure 4 , the process of measuring the water seepage coefficient by the combined water-gas subsidence consolidation and penetration tester of the present invention is:

[0080] Step 1, according to step 1 and step 2 in Example 1, install and fasten the sample, and plug the first channel, the second channel, the third channel and the fourth pipe interface 2-4 with hole plugs;

[0081] Step two, will figure 1 The medium seepage coefficient measurement system II is connected to the collapsible consolidation penetrometer I through a hose, and the second pipe interface 2-2 in the collapsible consolidation penetrometer I is connected to the fifth pipe joint 2-5 in the water seepage coefficient measuring system II. The third pipe connection 2-3 in the collapsibility consolidation penetrometer I is connected with the sixth pipe connection 2-6 in the water seepage coefficient measurement system II. There are six valves in the valve group I33,...

Embodiment 3

[0093] combine figure 1 , figure 2 , Figure 5 , the soil body water-gas consolidation permeation combined tester of the present invention measures the air permeability coefficient process as follows:

[0094] Step 1, install and fasten the sample according to Step 1 and Step 2 in Example 1, open the first hole plug 1-1, and plug the second channel, the third channel, and the second pipe interface 2-2 with the hole plug And the third pipe interface 2-3;

[0095] Step 2, open the B valve, connect the pressure measuring tube with the atmosphere, change the amount of mercury added, and make the position of the mercury column align with the zero position of the scale;

[0096] Step three, will figure 1 The medium air permeability coefficient measurement system III is connected with the collapsible consolidation permeameter I through a hose, the fourth pipe connection 2-4 in the collapsibility consolidation permeameter I is connected with the seventh pipe connection 2-7 in the...

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Abstract

The invention discloses a soil water-gas collapsibility-consolidation-penetration combined determinator. The determinator comprises a collapsibility-consolidation-penetration permeameter, a water seepage coefficient determination system and an air permeation coefficient determination system. The collapsibility-consolidation-penetration permeameter comprises a base and a cutting ring. The cutting ring is filled with a soil sample. The top end of the soil sample is provided with a pressurization control system. The pressurization control system is provided with a dial indicator for determining displacement of a piston in the pressurization control system and a compression gauge for determining air pressure. The water seepage coefficient determination system and the air permeation coefficient determination system are connected to the collapsibility-consolidation-penetration permeameter through pipe ports. The determinator utilizes a modularization design, can carry out a standard height soil sample test, can prepare soil samples with different heights according to demands and test them and can realize simultaneous determination of a penetration coefficient, an air permeation coefficient, a concretion coefficient, a loess collapsibility coefficient and a penetration coefficient and air permeation coefficient after loess collapse. The determinator has the characteristics of good flexibility, short test period, stable and reliable pressure control, labor and time saving and high cost performance.

Description

technical field [0001] The present invention relates to a soil water-air subsidence consolidation and permeability combined measuring instrument, in particular to a soil collapsibility test, consolidation test, water seepage coefficient measurement, air permeability coefficient measurement and soil permeability coefficient after collapsing Determination, gas permeability coefficient determination of the instrument. Background technique [0002] The adverse effects of water (atmospheric precipitation, irrigation water, industrial water, domestic wastewater, etc.) on rock and soil disasters (collapses, landslides, mud flows, land subsidence, etc.) have been widely recognized. Many geological disasters in the collapsible loess area are closely related to the seepage of water in the loess. However, in the natural environment, the seepage in the soil not only has the liquid phase seepage, but also has the gas phase seepage. The seepage law of the liquid and gas phases in the soi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/08G01N33/24
CPCG01N15/082G01N33/24
Inventor 孟振江李喜安洪勃
Owner CHANGAN UNIV
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