Experiment device for measuring collapsibility of saline soil

A technology of test equipment and measurement equipment, which is applied in the direction of soil material testing and material inspection products, and can solve problems such as foundation instability, strength reduction, and corrosion

Active Publication Date: 2019-12-27
THE THIRD ENG CO LTD OF CHINA RAILWAY SEVENTH GRP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When construction is carried out in saline soil areas, due to flooding of the foundation and the dissolution of salts in water, the strength is significantly reduced and corrosion occurs, resulting in serious instability of the foundation and causing

Method used

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  • Experiment device for measuring collapsibility of saline soil
  • Experiment device for measuring collapsibility of saline soil
  • Experiment device for measuring collapsibility of saline soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] see Figure 1-3 , in an embodiment of the present invention, a test device for measuring the subsidence of saline soil, including a sample storage device 1, a loading device 2, a water injection device 3 and a measuring device 4;

[0037] The sample storage device 1 is used to fill the soil to be tested. The sample storage device 1 includes a cylindrical cylinder with an open upper end, and the side wall of the cylindrical cylinder is provided with at least one set of round holes along its axis direction. Group 11, each group of round holes 11 includes at least two round holes 12 arrayed on the outside of the cylindrical barrel, and each round hole 12 is equipped with a rubber plug 13 for blocking.

[0038] The diameter of the circular hole 12 is 5 cm, and the inner diameter, height and thickness of the cylindrical barrel are respectively: 100 mm, 200 mm and 10 mm.

[0039] The loading device 2 is used for compacting the soil packed inside the cylindrical cylinder, and...

Embodiment 2

[0046] The difference from Example 1 is: the number of the circular hole groups 11 is three groups, and the distance between adjacent circular hole groups is 30cm;

[0047] The first group of round hole groups includes two round holes 12 with a diameter of 5 mm; the first group of round hole groups 11 has a second group of round hole groups 11 at 30 mm, and the second group of round hole groups 11 includes two diameters. The circular hole 12 of 5mm; the second group of circular hole group 11 has a third group of circular hole group 11 at 30mm, and the third group of circular hole group 11 includes two circular holes 12 with a diameter of 5mm.

[0048] The working principle of the present invention: under the use state, according to the test requirements, add different contents of saline soil into the sample storage device 1, use the fixed cover and apply weight 24 to compact the saline soil sample, after compaction , according to the content of the soil sample in the sample st...

Embodiment 3

[0050] see Figure 3-4 In order to prevent the detection of the collapse from being affected by the adsorption force generated between the periphery of the soil column and the inner wall of the cylinder, the sample storage device 1 is also provided with an auxiliary dividing part 5, and the auxiliary dividing part 5 includes a cylindrical The fixed ring 51 on the upper port of the cylinder, the fixed ring 51 is connected to the split rod 52 through the positioning rod, and the split rod 52 is arranged in the gap between the lower cover 21 and the inner wall of the cylindrical cylinder, and the split rod 52 is connected to the lower There is no contact between the covers 21, and a drive motor 56 is installed on the outside of the cylindrical barrel, and the output end of the drive motor 56 is provided with a power gear 55 that meshes with the driven gear ring on the outside of the fixed ring 51, through which the drive motor 56 Cooperate with the gear transmission to drive the ...

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Abstract

The invention discloses an experiment device for measuring collapsibility of saline soil. The experiment device comprises a sample storage device, a loading device, a water injection device and a measurement device, wherein the sample storage device is used for filling to-be-detected soil and comprises a cylindrical barrel, an opening is formed in an upper end of the cylindrical barrel, at least one group of round holes are formed in a side wall of the cylindrical barrel along an axial direction of the cylindrical barrel, and each group of round holes at least comprises two round holes which are distributed in an outer side of the cylindrical barrel in an array way. By the device, simulation experiment can be performed according to different requirements and different quantity of soil adjustment samples, the experiment phenomenon and progress can be effectively observed by the transparent glass, water can be injected through different round holes, the angles and the quantity of water injection are improved, and on the basis of the reasons, the device can be widely promoted in the field of collapsibility measurement experiment of the saline soil.

Description

technical field [0001] The invention relates to the technical field of detection of saline soil subsidence, in particular to a test device for measuring saline soil subsidence. Background technique [0002] At present, saline soil is a special regional soil, which is distributed in all countries in the world. my country is also one of the countries with a wide distribution of saline soil, mainly distributed in low-level basins and plains in the arid regions of Northwest China, North China Plain and some lake basins and depressions in the Qinghai-Tibet Plateau. In addition, there are also considerable areas of saline soil distribution in coastal areas . There are great differences in engineering characteristics of saline soil in different regions, and there are also great differences in the same region. Among the three major hazards caused by saline soil to highway engineering, dissolution deformation and salt swelling also play an important role. When construction is carri...

Claims

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Application Information

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IPC IPC(8): G01N33/24
CPCG01N33/24
Inventor 潘兴良唐瑞兆刘建国栗勇石建军王涛白斌张龙哈军曹璐李慎刚李金永
Owner THE THIRD ENG CO LTD OF CHINA RAILWAY SEVENTH GRP
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