Freeze-thaw characteristic testing device for coarse-particle saline soil

Abstract

The utility model belongs to the technical field of mechanical stress test soil engineering characteristics, and particularly relates to a coarse particle saline soil freeze-thaw characteristic test device which comprises a test box, a detection component, sample soil and a base plate, the detection component is arranged at the right end of an inner cavity of the test box and comprises a supporting plate, a detection groove and a displacement sensor, and the supporting plate is arranged at the right end of the inner cavity of the test box. The supporting plate is embedded in an inner cavity of the test box, a detection groove is formed in the upper end of the supporting plate, and a displacement sensor is arranged at the top end of the inner side of the detection groove; sample soil is placed in the test box; the base plate is arranged at the top of the sample soil, the base plate comprises a panel and a convex block, the convex block extending into the detection groove is arranged at the right end of the panel, the displacement amount in the freezing and thawing process is detected through the displacement sensor, an analysis test on the freezing and thawing characteristics of the coarse-particle saline soil is achieved, external equipment does not need to carry the displacement sensor, and the operation is simple and convenient. The device can be conveniently put into a freezing and thawing test box for testing.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical stress testing of soil engineering properties, in particular to a coarse-grained saline soil freeze-thaw property testing device. Background Art

[0002] Saline soil is a general term for saline soil, alkaline soil and various salinized and alkaline soils. Saline soil refers to soil with soluble salt content that is significantly harmful to crop growth, and alkaline soil refers to soil containing a large amount of exchangeable sodium that is harmful to plant growth and changes soil properties. Saline soil is mainly distributed in inland arid and semi-arid areas, and is also distributed in coastal areas. For roads paved in saline soil areas, when the ambient temperature changes, the salt in the soil will absorb water and crystallize when it encounters low temperature, causing the soil volume to expand and deform; the salt in the soil will release water and melt when it encounters high temperature, causing the soil to melt and sink.

[0003] The main road diseases in saline soil areas include salt swelling, dissolution, mudslides and corrosion. Salt can reduce the strength of the road surface, weaken the sealing effect, and cause road damage.

[0004] In order to ensure the quality of roads, the freeze-thaw characteristics of the soil need to be analyzed before paving. To this end, this application proposes a coarse-grained saline soil freeze-thaw characteristics test device. Utility Model Content

[0005] The purpose of this section is to summarize the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the name of the utility model of this application to avoid blurring the purpose of this section, the abstract of the specification and the name of the utility model, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0006] In view of the above and / or existing problems in the freezing and thawing of coarse-grained saline soil, the utility model is proposed.

[0007] Therefore, the purpose of the utility model is to provide a test device for the freeze-thaw characteristics of coarse-grained saline soil, which detects the displacement during the freeze-thaw process through a displacement sensor to realize the analysis test of the freeze-thaw characteristics of coarse-grained saline soil. No external equipment is required to carry the displacement sensor, which makes it convenient to place the device in a freeze-thaw test box for testing.

[0008] In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0009] A coarse-grained saline soil freeze-thaw characteristics test device, comprising:

[0010] Test chamber;

[0011] A detection component is arranged at the right end of the inner cavity of the test box, and the detection component includes a support plate, a detection slot and a displacement sensor. The support plate is embedded in the inner cavity of the test box, the upper end of the support plate is provided with a detection slot, and the displacement sensor is arranged at the inner top end of the detection slot;

[0012] The sample soil is placed in the test box;

[0013] A pad is arranged on the top of the sample soil, and the pad includes a panel and a convex block. The right end of the panel is provided with a convex block extending into the detection groove.

[0014] As a preferred solution of a coarse-grained saline soil freeze-thaw characteristics test device described in the utility model, the test box includes a box body, an opening groove and a movable door panel, the left end of the box body is provided with an opening groove, the bottom of the opening groove is hinged to the movable door panel, and the movable door panel is embedded in the opening groove.

[0015] As a preferred solution of a coarse-grained saline soil freeze-thaw characteristics test device described in the utility model, wherein: a first limiting hole is opened on the side of the opening groove, and a second limiting hole corresponding to the first limiting hole is opened on the side of the movable door panel.

[0016] As a preferred solution of a coarse-grained saline soil freeze-thaw characteristics test device described in the utility model, wherein: a slide groove is opened on the front side of the box body, brackets are arranged at both ends of the outer side of the slide groove, a screw rod is connected between the brackets, a crank handle is arranged at the outer end of the screw rod, a slider connected to the slide groove is arranged on the side of the support plate, and a screw hole connected to the screw rod is arranged at the outer end of the slider.

[0017] As a preferred solution of the coarse-grained saline soil freeze-thaw characteristics test device described in the utility model, the right side wall of the box body and the left side wall of the movable door panel are both provided with handles.

[0018] As a preferred solution of the coarse-grained saline soil freeze-thaw characteristics test device described in the utility model, wherein: the pad is a transparent plate, and a buckle groove is opened at the left end of the pad.

[0019] As a preferred solution of the coarse-grained saline soil freeze-thaw characteristics test device described in the utility model, a bearing is connected between the screw rod and the bracket.

[0020] Compared with the prior art: the utility model places the sample soil in a test box, and the test box is placed in a freeze-thaw test box for testing. The displacement amount during the freeze-thaw process is detected by a displacement sensor to realize the analysis test of the freeze-thaw characteristics of coarse-grained saline soil. No external equipment is required to be equipped with a displacement sensor, which makes it easy to place the device in the freeze-thaw test box. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the implementation of the utility model, the utility model will be described in detail below in combination with the drawings and detailed implementation. Obviously, the drawings described below are only some implementations of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0022] Figure 1 This is a schematic diagram of the shaft side structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the internal structure of the test box of the utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the test box of the utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the detection component of the utility model.

[0026] In the figure: 100 test box, 110 box body, 120 opening slot, 121 first limiting hole, 130 movable door panel, 131 second limiting hole, 140 slide slot, 150 bracket, 160 screw rod, 170 crank handle, 180 handle, 200 detection component, 210 support plate, 220 detection slot, 230 displacement sensor, 240 slider, 250 screw hole, 300 sample soil, 400 pad, 410 panel, 420 bump. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific implementation methods disclosed below.

[0029] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the implementation of the present invention, for the sake of convenience, the cross-sectional diagram showing the device structure will not be partially enlarged according to the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0030] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0031] The utility model provides a coarse-grained saline soil freeze-thaw characteristics test device, which detects the displacement during the freeze-thaw process through a displacement sensor to realize the analysis test of the freeze-thaw characteristics of the coarse-grained saline soil. No external equipment is required to carry a displacement sensor, which makes it easy to put the device into a freeze-thaw test box for testing. Please refer to Figure 1-Figure 4 , including: a test box 100, a detection component 200, a sample soil 300 and a pad 400.

[0032] The test box 100 is used to store the sample soil 300. The test box 100 is placed in a temperature-adjustable freeze-thaw test box to perform a freeze-thaw test on the sample soil 300.

[0033] The detection component 200 is arranged at the right end of the inner cavity of the test box 100. The detection component 200 includes a support plate 210, a detection slot 220 and a displacement sensor 230. The support plate 210 is embedded in the inner cavity of the test box 100. The detection slot 220 is provided at the upper end of the support plate 210. The displacement sensor 230 is provided at the inner top of the detection slot 220.

[0034] The support plate 210 is attached to the right end of the inner cavity of the test box 100 , and the detection slot 220 is a longitudinal rectangular slot, and the displacement is detected by the displacement sensor 230 .

[0035] The sample soil 300 is placed in the test box 100; the sample soil 300 is coarse-grained saline soil.

[0036] The backing plate 400 is arranged on the top of the sample soil 300, and the backing plate 400 includes a panel 410 and a protrusion 420, and the protrusion 420 extending into the detection groove 220 is arranged at the right end of the panel 410;

[0037] Among them, the pad 400 is laid flat on the top of the sample soil 300 to flatten the sample soil 300. During the freezing and thawing process, the sample soil 300 will expand and collapse. The pad 400 rises and falls with the sample soil 300, so that the protrusion 420 rises and falls with the sample soil 300. The displacement sensor 230 is used to detect the displacement of the protrusion 420 to obtain the displacement of the sample soil 300.

[0038] Since the test is not single at this time, after the experiment, it is necessary to pour out the sample soil 300 and replace it with a new sample for testing. The test box 100 is only open at the top. When pouring out the sample soil 300, the test box 100 needs to be turned over, which is more laborious. Therefore, the test box 100 includes a box body 110, an opening groove 120 and a movable door plate 130. The box body 110 has an opening groove 120 at the left end, and the movable door plate 130 is hinged at the bottom of the opening groove 120. The movable door plate 130 is embedded in the opening groove 120;

[0039] When replacing the sample soil 300, the movable door panel 130 is opened, and the right end of the test box 100 is lifted, so that the sample soil 300 can slide out from the left end, which saves time and effort.

[0040] Since the movable door plate 130 needs to be closed when filling soil, a first limiting hole 121 is opened on the side of the opening groove 120, and a second limiting hole 131 corresponding to the first limiting hole 121 is opened on the side of the movable door plate 130;

[0041] When closing is required, the movable door panel 130 is closed, and the latch is inserted between the second limiting holes 131 corresponding to the first limiting holes 121 to close the movable door panel 130. The movable door panel 130 can be opened by pulling out the latch, which is convenient for opening and closing operations.

[0042] Since the sample soil 300 will adhere to the inner wall of the box 110 after freezing and thawing, it is difficult to pour out the soil adhered inside by simply pouring. Therefore, a slide groove 140 is opened on the front side of the box 110, and brackets 150 are arranged at both ends of the outer side of the slide groove 140. A screw rod 160 is connected between the brackets 150, and a crank handle 170 is arranged at the outer end of the screw rod 160. A slider 240 connected to the slide groove 140 is arranged on the side of the support plate 210, and a screw hole 250 connected to the screw rod 160 is arranged at the outer end of the slider 240;

[0043] The screw rod 160 is rotated by the crank 170 to drive the support plate 210 to move in the box body 110, so as to scrape off the soil adhering to the inner wall of the box body 110, thereby facilitating the cleaning of the sample soil 300 adhering to the inside.

[0044] Since the soil needs to be filled and discharged back and forth, the box body 110 needs to be carried back and forth. To facilitate the carrying of the box body 110, the right side wall of the box body 110 and the left side wall of the movable door panel 130 are both provided with handles 180;

[0045] The box body 110 is lifted up by the handle 180 and is carried for use.

[0046] Since the pad 400 covers the top of the sample soil 300, it is difficult to observe the freeze-thaw state of the sample soil 300. For this reason, the pad 400 adopts a transparent plate, and a buckle groove is opened at the left end of the pad 400, which is convenient for observing the freeze-thaw state of the sample soil 300 through the pad 400. The pad 400 can be opened by buckling fingers in the buckle groove.

[0047] Since the screw rod 160 itself needs to rotate, if it is directly connected, there will be friction resistance between the screw rod 160 and the bracket 150. For this reason, a bearing is connected between the screw rod 160 and the bracket 150 to facilitate the rotation of the screw rod 160.

[0048] During specific use, the sample soil 300 is added to the interior of the box 110, the pad 400 is laid flat on the top of the sample soil 300, the sample soil 300 is flattened, and the box 110 is placed in a temperature-adjustable freeze-thaw test box. A freeze-thaw test is performed on the sample soil 300. During the freeze-thaw process, the sample soil 300 will expand and collapse, and the protrusion 420 will rise and fall with the sample soil 300. The displacement sensor 230 is used to detect the displacement of the protrusion 420 to obtain the displacement of the sample soil 300. After the test, the movable door panel 130 is opened, and the right end of the test box 100 is raised to make the sample soil 300 slide out from the left end. The screw 160 is rotated by the crank 170 to drive the support plate 210 to move in the box 110, and the soil adhered to the inner wall of the box 110 is scraped off.

[0049] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and these combinations are not exhaustively described in this specification only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A coarse-grained saline soil freeze-thaw characteristics test device, characterized in that: include: Test chamber (100); A detection component (200) is arranged at the right end of the inner cavity of the test box (100), the detection component (200) comprises a support plate (210), a detection slot (220) and a displacement sensor (230), the support plate (210) is embedded in the inner cavity of the test box (100), the detection slot (220) is provided at the upper end of the support plate (210), and the displacement sensor (230) is provided at the inner top end of the detection slot (220); A soil sample (300) is placed in the test box (100); A backing plate (400) is arranged on the top of the sample soil (300), and the backing plate (400) comprises a panel (410) and a convex block (420). The convex block (420) extending into the detection groove (220) is arranged at the right end of the panel (410).

2. A coarse-grained saline soil freeze-thaw characteristics test device according to claim 1, characterized in that: The test box (100) comprises a box body (110), an opening slot (120) and a movable door plate (130); the box body (110) has an opening slot (120) at the left end; the movable door plate (130) is hinged at the bottom of the opening slot (120); and the movable door plate (130) is engaged with the opening slot (120).

3. A coarse-grained saline soil freeze-thaw characteristics test device according to claim 2, characterized in that: A first limiting hole (121) is formed on the side of the opening groove (120), and a second limiting hole (131) corresponding to the first limiting hole (121) is formed on the side of the movable door plate (130).

4. A coarse-grained saline soil freeze-thaw characteristics test device according to claim 2, characterized in that: A slide groove (140) is provided on the front side of the box body (110), and brackets (150) are provided at both ends of the outer side of the slide groove (140), a screw rod (160) is connected between the brackets (150), and a crank handle (170) is provided at the outer end of the screw rod (160), and a slider (240) connected to the slide groove (140) is provided on the side of the support plate (210), and a screw hole (250) connected to the screw rod (160) is provided at the outer end of the slider (240).

5. The coarse-grained saline soil freeze-thaw characteristics test device according to claim 2, characterized in that: The right side wall of the box body (110) and the left side wall of the movable door panel (130) are both provided with handles (180).

6. The coarse-grained saline soil freeze-thaw characteristics test device according to claim 1, characterized in that: The backing plate (400) is a transparent plate, and a buckle groove is provided at the left end of the backing plate (400).

7. The coarse-grained saline soil freeze-thaw characteristics test device according to claim 4, characterized in that: A bearing is connected between the screw rod (160) and the bracket (150).

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