CN203148869U - Coarse-grain salty soil freeze-thaw characteristic test device - Google Patents
Coarse-grain salty soil freeze-thaw characteristic test device Download PDFInfo
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- CN203148869U CN203148869U CN 201320175866 CN201320175866U CN203148869U CN 203148869 U CN203148869 U CN 203148869U CN 201320175866 CN201320175866 CN 201320175866 CN 201320175866 U CN201320175866 U CN 201320175866U CN 203148869 U CN203148869 U CN 203148869U
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Abstract
The utility model relates to a coarse-grain salty soil freeze-thaw characteristic test device. A clamping groove is machined on the upper surface of a bottom cushion block, a barrel is arranged in the clamping groove on the upper surface of the bottom cushion block, the bottom cushion block is provided with a displacement sensor support with a displacement sensor, the displacement sensor is connected with a computer through a data line, and the inner upper end of the barrel is provided with an upper liner plate which is in lap joint with a displacement rod of the displacement sensor. When in test, a soil sample is loaded into the barrel, the upper liner plate is arranged on the soil sample, the displacement rod of the displacement sensor is in lap joint with the upper liner plate, the test device is arranged into a freeze-thaw refrigerator capable of adjusting the temperature, the volume of the soil sample in the barrel is changed along with the variation of the temperature inside the freeze-thaw refrigerator, a displacement signal, received by the displacement sensor, of the soil sample is converted to an electric signal, then the electric signal is converted to a digital signal to be outputted to a computer, and the salt heaving deformation and the thaw collapse deformation of the coarse-grain salty soil can be calculated through the computer. The coarse-grain salty soil freeze-thaw characteristic test device has the advantages of simplicity in structure, high sensitivity and the like and can be used as a test instrument for testing the freeze-thaw characteristics of the coarse-grain salty soil.
Description
Technical field
The utility model belongs to the technical field with mechanical stress test soil body engineering characteristic, is specifically related to a kind of device of testing the Coarse Saline Freeze-thawing Characteristics.
Background technology
Before the making highway, need the earth roadbed compaction treatment of carrying out, making gathers materials and concrete material on earth roadbed then, and when ambient temperature changes, variation to a certain degree also can take place in roadbed material.In northern cold season in winter, the temperature reduction can cause earth roadbed freezing, volumetric expansion, when spring, weather was warm, temperature rose and makes earth roadbed thawing, roadbed generation freeze thawing circulation change, roadbed occurs sinking, and the sinking crack appears in the concrete layer of laying of roadway, has influence on traffic safety.
Saliferous clay is the general name of solonchak and alkaline earth and various salinization, alkali-affected soil.Solonchak refers to that soluble-salt content reaches the great soil group that plant growth is had remarkable harm in the soil, the volume exchangeable sodium that alkaline earth refers to contain the growth of harm plant in the soil and changes soil property.Saliferous clay mainly is distributed in landlocked arid, semiarid zone, and coastal region also has distribution.At the highway of saline soil area making, when ambient temperature changed, the salinity in the soil body is met low temperature can produce the suction crystallization, caused soil body volumetric expansion distortion; Salinity chance high temperature in the soil body can produce releases the water thawing, causes the soil body to melt and sink.
Types such as the saline soil area highway distress mainly contains that salt expands, moltenly falls into, frost boiling and corrosion.Salinity can reduce pavement strength, weaken the seal effect, causes pavement destruction.Up to now, by the research that saliferous clay salt is expanded, people have had understanding comparatively all sidedly to the character of particulate saliferous clay, and it is bloated theoretical progressively to have formed comparatively perfect saliferous clay salt, but the limitation that is limited to the investigative technique means, very few greater than the research of 2mm Coarse Saline for particle diameter, how accurately to measure the volume change degree of coarse grain saliferous clay under extraneous environmental change influence, most important for the highway safety of coarse grain saline soil area.
In the testing equipment technical field of building the road, the urgent technical matters that solves of current need provides a kind of wide accommodation, automaticity height, easy to operate, the intensity of variation of the Coarse Saline soil body freeze thawing that causes owing to temperature variation can be tested, and testing tool or the equipment of the bloated rate of Coarse Saline salt and molten sunken rate characteristic can be measured exactly.
Summary of the invention
Technical problem to be solved in the utility model is to overcome the deficiency of above-mentioned prior art, and the Coarse Saline Freeze-thawing Characteristics test unit of a kind of wide accommodation, automaticity height, practicality convenient and simple for operation is provided.
Solving the problems of the technologies described above the technical scheme that adopts is: the cushion block upper surface is processed with draw-in groove in the bottom, cylindrical shell is arranged in the draw-in groove of bottom cushion block upper surface, on the cushion block of bottom the displacement sensor bracket that displacement transducer is installed is set, displacement transducer links to each other with computing machine by data line, and the upper end is provided with the upper padding plate with the displacement bar overlap joint of displacement transducer in the cylindrical shell.
Cylinder internal diameter of the present utility model is at least 28cm, and the internal diameter of cylindrical shell and aspect ratio are 3.99.
The utility model is packed soil sample in the cylindrical shell, place upper padding plate on the soil sample, the displacement bar of displacement transducer and upper padding plate overlap joint, during test, Coarse Saline Freeze-thawing Characteristics test unit is put into the freeze thawing refrigerator that to regulate temperature, change along with temperature in the freeze thawing refrigerator, the volume of soil sample changes in the cylindrical shell, the displacement bar of displacement transducer changes, the displacement signal that displacement transducer will receive soil sample converts electric signal to and converts digital signal to and outputs to computing machine, computing machine carries out computing according to the program of prior setting, draws salt bulging deformation amount and the thaw collapse deflection of Coarse Saline.The Coarse Saline Freeze-thawing Characteristics test unit of this structure, simple in structure, highly sensitive, practical, can be used as test Coarse Saline Freeze-thawing Characteristics test apparatus.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment 1.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described, but the utility model is not limited to these embodiment.
Embodiment 1
In Fig. 1, the Coarse Saline Freeze-thawing Characteristics test unit of present embodiment is made of displacement sensor bracket 1, cylindrical shell 2, displacement transducer 3, upper padding plate 4, computing machine 5,6 connections of bottom cushion block.
The bottom cushion block 6 of present embodiment is the round boss body, upper surface at bottom cushion block 6 is processed with draw-in groove 6, the horizontal section of draw-in groove 6 is circular groove, the internal diameter of draw-in groove 6 is less than the external diameter of bottom cushion block 6, be fixedly connected with the screw threads for fastening connector on the cushion block 6 of bottom displacement sensor bracket 1 is installed, be fixedly connected with the screw threads for fastening connector on the displacement sensor bracket 1 displacement transducer 3 is installed, displacement transducer 3 links to each other with computing machine 5 by data line.Be placed with cylindrical shell 2 in the draw-in groove 6 of bottom cushion block 6, the external diameter of cylindrical shell 2 is identical with the internal diameter of draw-in groove 6, and cylindrical shell 2 is the organic glass tube, cylindrical shell 2 internal diameters are 28cm, the internal diameter of cylindrical shell 2 and aspect ratio are 3.99, and cylindrical shell 2 internal diameters are at least 28cm, prevent the particle size effect of coarse-grained soil.
During test, at inwall and the bottom brushing vaseline of cylindrical shell 2, strengthen the lubricity of barrel, in case clay is placed on soil sample 7 on the bottom of cylindrical shell 2, upper padding plate 4 is pressed on the soil sample 7, upper padding plate 4 is poly (methyl methacrylate) plate, the displacement bar of displacement transducer 3 and upper padding plate 4 overlap joints.The utility model is positioned in the freeze thawing refrigerator that can regulate temperature, change along with temperature in the freeze thawing refrigerator, the volume of soil sample 7 changes in the cylindrical shell 2, the variation of soil sample 7 volumes changes the position of the upper padding plate 4 of soil sample 7 tops, the displacement signal that will receive soil sample 7 with the displacement transducer 3 of upper padding plate 4 overlap joint converts electric signal to and converts digital signal to and outputs to computing machine 5, computing machine 5 carries out computing according to the program of prior setting, draws salt bulging deformation amount and the thaw collapse deflection of Coarse Saline.
Embodiment 2
Upper surface at bottom cushion block 6 is processed with draw-in groove 6, and the horizontal section of draw-in groove 6 is circular groove, is placed with cylindrical shell 2 in draw-in groove 6, the external diameter of cylindrical shell 2 is identical with the internal diameter of draw-in groove 6, cylindrical shell 2 is the organic glass tube, and cylindrical shell 2 internal diameters are 40cm, and the internal diameter of cylindrical shell 2 and aspect ratio are 3.99.The connecting relation of other parts and parts is identical with embodiment 1.
Claims (2)
1. Coarse Saline Freeze-thawing Characteristics test unit, it is characterized in that: be processed with draw-in groove at bottom cushion block (6) upper surface, cylindrical shell (2) is arranged in the draw-in groove of bottom cushion block (6) upper surface, bottom cushion block (6) is gone up the displacement sensor bracket (1) that displacement transducer (3) are installed is set, displacement transducer (3) links to each other with computing machine (5) by data line, and the upper end is provided with the upper padding plate (4) with the displacement bar overlap joint of displacement transducer (3) in the cylindrical shell (2).
2. Coarse Saline Freeze-thawing Characteristics test unit according to claim 1, it is characterized in that: described cylindrical shell (2) internal diameter is at least 28cm, and the internal diameter of cylindrical shell (2) and aspect ratio are 3.99.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320175866 CN203148869U (en) | 2013-04-09 | 2013-04-09 | Coarse-grain salty soil freeze-thaw characteristic test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320175866 CN203148869U (en) | 2013-04-09 | 2013-04-09 | Coarse-grain salty soil freeze-thaw characteristic test device |
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| Publication Number | Publication Date |
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| CN203148869U true CN203148869U (en) | 2013-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320175866 Expired - Fee Related CN203148869U (en) | 2013-04-09 | 2013-04-09 | Coarse-grain salty soil freeze-thaw characteristic test device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743771A (en) * | 2013-12-04 | 2014-04-23 | 新疆农业大学 | Freeze-thawing circulation detection apparatus for nature saline soil |
| CN104181189A (en) * | 2014-08-20 | 2014-12-03 | 佛山金智节能膜有限公司 | Method for testing heat insulation performance of intelligent glass film in low-temperature environment |
| CN107064474A (en) * | 2017-03-22 | 2017-08-18 | 青海大学 | A kind of swollen characteristic test apparatus of the salt of salinized soil |
| CN109253941A (en) * | 2018-11-12 | 2019-01-22 | 东北大学 | A kind of unsaturated soil freezing-thawing test device |
| CN110618254A (en) * | 2019-10-22 | 2019-12-27 | 中铁七局集团第三工程有限公司 | Test device for measuring saline soil collapsibility |
| CN113189308A (en) * | 2021-05-11 | 2021-07-30 | 西安建筑科技大学 | Deformation testing device for saline soil foundation |
-
2013
- 2013-04-09 CN CN 201320175866 patent/CN203148869U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743771A (en) * | 2013-12-04 | 2014-04-23 | 新疆农业大学 | Freeze-thawing circulation detection apparatus for nature saline soil |
| CN103743771B (en) * | 2013-12-04 | 2016-01-20 | 新疆农业大学 | A kind of Frozen-thawed cycled pick-up unit being applicable to natural salt dirting soil |
| CN104181189A (en) * | 2014-08-20 | 2014-12-03 | 佛山金智节能膜有限公司 | Method for testing heat insulation performance of intelligent glass film in low-temperature environment |
| CN107064474A (en) * | 2017-03-22 | 2017-08-18 | 青海大学 | A kind of swollen characteristic test apparatus of the salt of salinized soil |
| CN109253941A (en) * | 2018-11-12 | 2019-01-22 | 东北大学 | A kind of unsaturated soil freezing-thawing test device |
| CN110618254A (en) * | 2019-10-22 | 2019-12-27 | 中铁七局集团第三工程有限公司 | Test device for measuring saline soil collapsibility |
| CN110618254B (en) * | 2019-10-22 | 2021-11-23 | 中铁七局集团第三工程有限公司 | Test device for measuring saline soil collapsibility |
| CN113189308A (en) * | 2021-05-11 | 2021-07-30 | 西安建筑科技大学 | Deformation testing device for saline soil foundation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130821 Termination date: 20140409 |