Novel soil engineering simple evaporimeter sample cylinder

Abstract

The utility model discloses a novel soil engineering simple evaporimeter sample cylinder which comprises a sample cylinder, at least two tensiometers and a support assembly, the support assembly comprises a support and a support elastic piece, two ends of the support elastic piece are respectively connected with the support and the side wall of the sample cylinder, one end of the tensiometer is connected with the support, and the other end penetrates through the side wall of the sample cylinder to contact with a soil sample in the sample cylinder. The tensiometer is inserted into the side wall of the sample cylinder and installed on the support, the support elastic piece pulls the support to move towards the sample cylinder, so that the tensiometer abuts against a soil sample in the sample cylinder, the integrity of the soil sample is guaranteed, the situation that holes are dug in the soil sample for installing the tensiometer is avoided, meanwhile, the tensiometer cannot block water evaporation of the soil sample, and the soil sample is not damaged is avoided. The condition that the moisture evaporation of the soil sample is influenced by the tensiometer is avoided, the accuracy of data is ensured, and the measurement error is reduced. Besides, the detachable cover plate is additionally arranged at the end part of the sample cylinder, so that the two processes of compaction and saturation of the soil sample can be carried out in the same sample cylinder, and the sample preparation efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of geotechnical engineering test technology, and in particular to a novel geotechnical simple evaporator sample tube. Background Art

[0002] The hydraulic characteristic parameters of unsaturated soil usually include soil-water characteristic curve and unsaturated permeability coefficient. Accurately obtaining the hydraulic characteristic parameters of unsaturated soil is the key to seepage analysis in geotechnical engineering.

[0003] The simple evaporation method is to install two tensiometers at different heights on the side wall of the sample tube, and then place the entire sample tube on a weighing balance for free evaporation. During the evaporation process, the mass change of the sample tube is measured in real time, thereby inferring the change in moisture content of the sample. The change in suction of the soil sample during the evaporation process is then measured by the tensiometer. After measurement and calculation, the hydraulic characteristic parameters of unsaturated soil at different times can be obtained.

[0004] At present, the existing simple evaporator sample tube usually places the soil sample compacted in the soil sample compaction tube inside the sample tube for vacuum saturation, then drills holes at different heights on the tube wall, and digs out part of the soil from the hole to form a tensiometer installation hole. The tensiometer is inserted through the hole on the sample tube wall, and then the tensiometer is installed in the dug hole. The gap between the tensiometer and the surrounding soil is backfilled and compacted with test soil, and the tensiometer wire is fixed with bolts. After the test is completed, the tensiometer is taken out from the sample tube wall and the soil hole, and finally the sample tube is placed in an oven and weighed to calculate the dry soil mass.

[0005] At present, a part of the soil sample in the sample tube of the simple evaporator is dug out and then the tensiometer is inserted. After the test, the tensiometer needs to be taken out, which destroys the integrity of the soil sample and blocks the evaporation of water in the soil under the tensiometer, making the test data collection inaccurate and increasing the measurement error. Utility Model Content

[0006] The technical problem to be solved by the present application is that part of the soil sample in the sample tube of the current simple evaporator is dug out and then the tensiometer is inserted. After the test, the tensiometer needs to be taken out, which destroys the integrity of the soil sample and blocks the evaporation of moisture in the soil below the tensiometer, making the test data collection inaccurate and increasing the measurement error.

[0007] In order to solve the above technical problems, the present application provides a new type of geotechnical simple evaporator sample tube.

[0008] The utility model discloses a novel geotechnical simple evaporator sample tube, which comprises a sample tube, at least two tensiometers, and a support assembly;

[0009] The support assembly includes a support and a support elastic member, the two ends of the support elastic member are respectively connected to the support and the side wall of the sample tube, one end of the tensiometer is connected to the support, and the other end penetrates the side wall of the sample tube to contact the soil sample inside the sample tube.

[0010] Preferably, the sample tube comprises a first cover plate, a tube body, a second cover plate, and a permeable stone;

[0011] The first cover plate is provided with a hole at the center position, the first cover plate and the second cover plate are respectively connected to the two ends of the cylinder body, and the permeable stone is installed between the first cover plate and the cylinder body.

[0012] Preferably, the sample tube includes a fastening screw, and the first cover plate and the second cover plate are connected to the tube body by the screws.

[0013] Preferably, the first cover plate is provided with a mounting groove, the inner diameter of the mounting groove matches the outer diameter of the permeable stone, and the opening of the mounting groove faces the cylinder body.

[0014] Preferably, the diameter of the permeable stone is larger than the inner diameter of the cylinder body.

[0015] Preferably, the sample tube comprises a sealing ring, and the sealing ring is installed at the connection between the first cover plate and the tube body and at the connection between the second cover plate and the tube body.

[0016] Preferably, the barrel is provided with a through hole, and the tension meter matches the size of the through hole.

[0017] Preferably, the sample tube comprises a sealing ring, and the sealing ring is installed on the inner wall of the through hole.

[0018] Preferably, an opening is arranged at the center of the support, and the tensiometer is arranged to penetrate the opening.

[0019] Preferably, the support comprises a fixing hole, and the support elastic member is connected to the fixing hole.

[0020] The above technical solution provided by this application has the following advantages compared with the prior art:

[0021] The present application provides a new type of geotechnical simple evaporator sample tube, in which the tensiometer is inserted into the side wall of the sample tube, and the tensiometer is installed on a support. The elastic member of the support pulls the support to move toward the sample tube, so that the tensiometer is supported on the soil sample in the sample tube, ensuring the integrity of the soil sample and avoiding digging holes in the soil sample for installing the tensiometer. At the same time, the tensiometer can no longer block the evaporation of moisture in the soil sample, avoiding the situation where the tensiometer affects the evaporation of moisture in the soil sample, ensuring the accuracy of the data, and reducing the measurement error. In addition, removable covers are provided at both ends of the sample tube. After the second waterproof cover is installed at the bottom, the soil sample can be compacted in the sample tube. After the soil sample is compacted, the second waterproof cover at the bottom is replaced with the first cover with permeable stone, and the first cover with permeable stone at the top is installed, and the sample can be saturated. The two processes of soil sample compaction and soil sample saturation can be carried out in the same sample tube, which improves the sample preparation efficiency.

[0022] The tensiometer and the sample tube wall are flexibly connected by the support elastic part, which realizes the close contact between the tensiometer and the soil sample surface during the whole evaporation process and ensures the continuity of the suction measurement during the whole evaporation test. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0025] Figure 1 A schematic diagram of the structure of a new type of geotechnical simple evaporator sample tube provided in this application;

[0026] Figure 2 A schematic cross-sectional view of a new type of geotechnical simple evaporator sample tube provided in this application;

[0027] Figure 3 for Figure 2 An enlarged schematic diagram of P;

[0028] Figure 4 for Figure 2 A magnified schematic diagram of Q;

[0029] Figure 5 A schematic diagram of the structure of a first cover plate and a permeable stone of a novel geotechnical simple evaporator sample tube provided in this application;

[0030] Figure 6A state diagram of a new type of geotechnical simple evaporator sample tube for testing provided in this application;

[0031] Figure 7 A cross-sectional view of a new type of geotechnical simple evaporator sample tube being tested provided in this application.

[0032] Description of reference numerals:

[0033] 1. New geotechnical simple evaporator sample tube;

[0034] 11. Sample tube; 111. First cover plate; 1111. Mounting groove; 112. Tube body; 1121. Through hole; 113. Second cover plate; 114. Permeable stone; 115. Fastening screw; 116. Sealing ring; 117. Sealing ring;

[0035] 12. Tensiometer;

[0036] 13. Support assembly; 131. Support; 1311. Opening; 1312. Fixing hole; 132. Support elastic member. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0038] The utility model discloses a novel geotechnical simple evaporator sample tube 1, which comprises a sample tube 11, at least two tensiometers 12, and a support assembly 13. The sample tube 11 is loaded with soil to be tested, one end of the tensiometer 12 is connected to the support assembly 13, and the other end is connected to the sample tube 11. The tensiometer 12 penetrates the side wall of the sample tube 11 and contacts with the soil inside. The tensiometer 12 is used to test the moisture content of the soil.

[0039] The support assembly 13 includes a support 131 and an elastic member of the support 131. The two ends of the elastic member of the support 131 are respectively connected to the support 131 and the side wall of the sample tube 11. One end of the tensiometer 12 is connected to the support 131, and the other end penetrates the side wall of the sample tube 11 to contact the soil sample inside the sample tube 11. When the tensiometer 12 and the support assembly 13 are installed on the side wall of the sample tube 11, the elastic member of the support 131 can pull the support 131 and the tensiometer 12 to press against the soil in the sample tube 11.

[0040] Specifically, the tensiometer 12 is inserted into the side wall of the sample tube 11, and the tensiometer 12 is installed on the support 131. The elastic member of the support 131 pulls the support 131 to move toward the sample tube 11, so that the tensiometer 12 is supported on the soil sample in the sample tube 11, ensuring the integrity of the soil sample and avoiding digging holes in the soil sample for installing the tensiometer 12. At the same time, the tensiometer 12 can no longer block the evaporation of moisture in the soil sample, thereby avoiding the situation where the tensiometer 12 affects the evaporation of moisture in the soil sample, ensuring the accuracy of the data, and reducing the measurement error. In addition, the current simple evaporator sample tube has a single function. It can only prepare the soil sample on the sample preparation device and then put it into the sample tube for saturation, but cannot be compacted inside the sample tube. In this solution, during the soil sample preparation and filling, first, the sample tube 11 is installed with a second cover plate 113 at the bottom end, and then the soil sample can be filled and compacted. After the compaction is completed, the second cover plate 113 is replaced with a first cover plate 111 with permeable stone, and the first cover plate 111 with permeable stone is also installed on the top of the sample tube 11, and then the entire sample tube is vacuumed and saturated. In this way, the two processes of soil sample compaction and soil sample saturation can be carried out in the same sample tube 11, which increases the function of the sample tube 11 and improves the sample preparation efficiency of the evaporation test.

[0041] In addition, the elastic member of the support 131 is used to flexibly connect the tensiometer 12 and the wall of the sample tube 11, so that the tensiometer 12 and the surface of the soil sample are in close contact during the entire evaporation process, ensuring the continuity of the suction measurement during the entire evaporation test. During the test, the elastic member of the support 131 is in a stretched state, which can continuously provide tension, so that the support 131 and the tensiometer 12 can continuously support the side wall of the sample tube 11.

[0042] The sample tube 11 includes a first cover plate 111, a tube body 112, a second cover plate 113, a permeable stone 114, a fastening screw 115, and a sealing ring 116; the first cover plate 111 is provided with an opening 1311 at the center position, the first cover plate 111 and the second cover plate 113 are respectively connected at both ends of the tube body 112, the permeable stone 114 is installed between the first cover plate 111 and the tube body 112, the first cover plate 111 and the second cover plate 113 are connected to the tube body 112 by screws, and the sealing ring 116 is installed at the connection between the first cover plate 111 and the tube body 112 and at the connection between the second cover plate 113 and the tube body 112.

[0043] Specifically, grooves are provided on the surfaces of both ends of the barrel 112, the size of which matches the sealing ring 116, the first cover plate 111 and the second cover plate 113 are buckled at both ends of the barrel 112, the sealing ring 116 can increase the airtightness of the inside of the barrel 112, and the fastening screws 115 can install the first cover plate 111 or the second cover plate 113 at both ends of the barrel 112; the diameter of the permeable stone 114 is larger than the inner diameter of the barrel 112, the inner diameter of the sealing ring 116 matches the diameter of the permeable stone 114, the first cover plate 111 is provided with an installation groove 1111, the inner diameter of the installation groove 1111 matches the outer diameter of the permeable stone 114, the opening of the installation groove 1111 faces the barrel 112, and the sealing ring 116 is installed between the first cover plate 111 and the permeable stone 114. The permeable stone 114 is buckled at one end of the barrel 112, and then the first cover plate 111 is buckled to the same end, and the permeable stone 114 is also installed at the same end.

[0044] When the second cover plate 113 is installed on the cylinder body 112, the cylinder body 112 is placed vertically, and the soil sample with the test is placed at the other end of the cylinder body 112 and compacted. After compaction, the second cover plate 113 is removed, and the permeable stones 114 are installed at both ends of the cylinder body 112. Then the first cover plate 111 is installed at both ends of the cylinder body 112. The permeable stones 114 can be vented during the saturation of the soil sample. This design enables the same sample cylinder 11 to both compact the soil sample inside and saturate the soil sample at the same time, because the two processes are for the same sample, reducing the cumbersome installation process of the sample in the traditional sample cylinder and improving the sample preparation efficiency of the evaporation test.

[0045] It can be understood that when the soil sample is placed in, the second cover plate 113 is installed on the cylinder body 112. After the soil sample is filled and compacted, permeable stones 114 and the first cover plate 111 are installed on both ends of the cylinder body 112 to keep the air permeability of the soil samples at both ends of the sample cylinder 11 consistent to avoid affecting the test results.

[0046] The sample tube 11 includes a sealing ring 117 , which is installed on the inner wall of the through hole 1121 . The tube body 112 is provided with the through hole 1121 , and the tensiometer 12 matches the through hole 1121 in size.

[0047] Specifically, the tensiometer 12 is inserted into the through hole 1121 , and a sealing ring 117 is disposed in the through hole 1121 . The sealing ring 117 and the tensiometer 12 are interference fit, which can increase the airtightness of the sample tube 11 and prevent water or air leakage from occurring at the through hole 1121 .

[0048] The support 131 includes an opening 1311 and a fixing hole 1312 . The opening 1311 is disposed at the center of the support 131 . The tensiometer 12 is disposed through the opening 1311 . The elastic member of the support 131 is connected to the fixing hole 1312 .

[0049] Specifically, one end of the elastic member of the support 131 is connected to the side wall of the sample tube 11, and the other end is installed in the fixing hole 1312 of the support 131. The inner diameter of the opening 1311 of the support 131 matches the outer diameter of the tensiometer 12. The tensiometer 12 is fixedly installed on the support 131 through the opening 1311. As an embodiment, the tensiometer 12 is connected to the opening 1311 of the support 131 through a threaded structure.

[0050] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0051] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0052] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0053] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be connected, detachably connected, or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0055] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0056] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include these modifications and variations.

[0057] The above is a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A new type of geotechnical simple evaporator sample tube, characterized in that: It includes a sample tube, at least two tensiometers, and a support assembly; The support assembly includes a support and a support elastic member, the two ends of the support elastic member are respectively connected to the support and the side wall of the sample tube, one end of the tensiometer is connected to the support, and the other end penetrates the side wall of the sample tube to contact the soil sample inside the sample tube.

2. The novel geotechnical simple evaporator sample tube according to claim 1 is characterized in that: The sample tube comprises a first cover plate, a tube body, a second cover plate, and a permeable stone; The first cover plate is provided with a hole at the center position, the first cover plate and the second cover plate are respectively connected to the two ends of the cylinder body, and the permeable stone is installed between the first cover plate and the cylinder body.

3. The novel geotechnical simple evaporator sample tube according to claim 2 is characterized in that: The sample tube comprises a fastening screw, and the first cover plate and the second cover plate are connected to the tube body through the screws.

4. The novel geotechnical simple evaporator sample tube according to claim 2 is characterized in that: The first cover plate is provided with a mounting groove, the inner diameter of the mounting groove matches the outer diameter of the permeable stone, and the opening of the mounting groove faces the cylinder body.

5. The novel geotechnical simple evaporator sample tube according to claim 2 is characterized in that: The diameter of the permeable stone is greater than the inner diameter of the cylinder body.

6. The novel geotechnical simple evaporator sample tube according to claim 2 is characterized in that: The sample tube comprises a sealing ring, which is installed at the connection between the first cover plate and the tube body and at the connection between the second cover plate and the tube body.

7. The novel geotechnical simple evaporator sample tube according to claim 2 is characterized in that: The barrel is provided with a through hole, and the tension meter matches the size of the through hole.

8. The novel geotechnical simple evaporator sample tube according to claim 7 is characterized in that: The sample tube comprises a sealing ring, and the sealing ring is installed on the inner wall of the through hole.

9. The novel geotechnical simple evaporator sample tube according to claim 1 is characterized in that: An opening is arranged at the center of the support, and the tensiometer is arranged to penetrate the opening.

10. The novel geotechnical simple evaporator sample tube according to claim 1 is characterized in that: The support comprises a fixing hole, and the support elastic member is connected to the fixing hole.

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