Soil sample compaction device capable of detecting water content

Abstract

The utility model discloses a soil sample compacting device capable of detecting water content, which comprises a water-permeable water-collecting base, triangular bearing devices are arranged at the upper parts of four break angles on the inner side of the water-permeable water-collecting base, the bearing devices are used for placing a bottom water-permeable plate, the device comprises two L-shaped water-permeable side plates, and the two L-shaped water-permeable side plates are arranged on the two L-shaped water-permeable side plates. Vertical grooves are engraved in the middles of the inner sides of the two L-shaped water-permeable side plates, the vertical grooves clamp the position of the cross-shaped water-permeable water partition plate, a fixing groove is engraved in the lower left area of one side plate and used for fixing a water content sensor, the water content sensor is connected with a data acquisition device, the data acquisition device comprises a compaction cushion block, and the compaction cushion block is fixedly connected with the cross-shaped water-permeable water partition plate. And the upper part of the compaction cushion block is used for placing a loading weight. According to the utility model, a saturated soil body can be compacted to prepare a sample during a geotechnical test, the overall stability is improved by using a stainless steel material, four samples with the same physical indexes can be conveniently obtained due to the design of quick disassembly, and the disturbance of secondary cutting to the samples is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of geotechnical testing, in particular to a compacting device used for loading and sampling fully saturated soil. Background Art

[0002] The evaporation of water in soil is a process of dynamic reduction of water content, accompanied by the evolution of soil structure, stress and strain state. It has a significant impact on the engineering properties of soil and is a direct cause of some engineering problems. Studying the water migration characteristics of different soils during evaporation under a fully saturated state and the water distribution characteristics during evaporation is of great significance to solving the engineering problems encountered in geotechnical engineering and foundation engineering. Due to the high impurity content of soil, soil samples are easily damaged and disturbed, and the size and shape of soil samples are inconsistent. Therefore, a sampling device for indoor soil sampling is needed to produce soil samples of the same size and shape, homogeneous soil, uniform water distribution, and the same physical indicators, so as to conduct controllable variable soil water evaporation research. Utility Model Content

[0003] The purpose of the utility model is to solve the shortcomings in the prior art and to propose a soil sampling and compacting device capable of detecting water content.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A soil sampling and compacting device capable of detecting water content, comprising a permeable water collecting base, characterized in that a triangular supporting device is arranged at the upper part of the four corners on the inner side of the permeable water collecting base, the supporting device is used to place a bottom permeable plate, the bottom permeable plate is affixed with a filter cloth, and the bottom permeable plate is drilled with permeable holes of equal distance and size, a soil sampling and compacting device capable of detecting water content, comprising two L-shaped permeable side plates, the two L-shaped permeable side plates are provided with screw holes at the upper and lower ends of the permeable plates, the screw holes are used to pass through fixing screws, the inner sides of the two L-shaped permeable side plates are affixed with nylon filter cloth, and the two L-shaped The permeable side panels are drilled with permeable holes of equal distance and size, and a vertical groove is engraved in the middle of the inner side of the L-shaped permeable side panels, the vertical groove clamps the position of the cross permeable partition panel, the cross permeable partition panel is drilled with permeable holes of equal distance and size, and the cross permeable partition panel (10) is all covered with nylon filter cloth; a fixed groove is engraved in the lower left area of ​​one of the side panels, the fixed groove is used to fix a moisture content sensor, the moisture content sensor is inserted into the compacted soil sample and connected to a data acquisition device, a soil sample compaction device capable of detecting moisture content, including a compaction pad, the compaction pad is used to place a loading weight.

[0006] Furthermore, the permeable water collecting base and the bottom permeable plate are separated from each other, and the permeable water collecting base is used to collect contaminated water seeping out of the soil sample during the pressing process.

[0007] Furthermore, the two L-shaped permeable side panels are tightly fixed together by four fixing screws, and the internal vertical grooves tightly clamp the cross permeable partition plate.

[0008] Furthermore, the compacting pad (14) is a wooden square pad with a thickness of 5 cm.

[0009] Furthermore, the loading weight (15) is loaded and unloaded according to the water seepage of the soil sample and the water content of the sample.

[0010] Furthermore, the water-permeable holes are circular holes with a diameter of 5 mm, and the distribution distance between two adjacent holes is 20 mm.

[0011] Furthermore, the filter cloths attached to the bottom permeable plate, the two L-shaped permeable side plates, and the cross permeable partition plate are made of nylon with a mesh size of 400 or above.

[0012] Furthermore, the permeable water collecting base (1), the supporting device (2), the bottom permeable plate (3), the two L-shaped permeable side plates (5) and (6), the fixing screws (8), and the cross permeable partition plate (10) are all made of stainless steel.

[0013] The beneficial effects of the utility model are:

[0014] 1. By using stainless steel materials to make components, the problems of mold deformation and water corrosion can be avoided, and the integrity of the compacted sample can be better ensured.

[0015] 2. The sample is divided into four parts by a cross-permeable partition plate and compacted and sampled simultaneously to avoid cutting and dividing the sample as a whole, thereby avoiding secondary disturbance after sample preparation is completed, and ensuring the integrity of the sample surface and internal structure.

[0016] 3. The cross permeable partition plate is fixed by making grooves on the inner side of the L-shaped permeable side plate to avoid sample deformation caused by mold displacement during loading.

[0017] 4. By inserting a moisture content sensor to monitor the moisture content changes in real time during the sample preparation process, the loading time and loading weight can be controlled more accurately, thereby preparing samples with the target moisture content. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a southwest isometric view of the exploded state of a soil sampling and compacting device capable of detecting moisture content proposed by the present invention.

[0019] Figure 2This is a top view of the exploded state of a soil sampling and compacting device capable of detecting moisture content proposed by the present invention.

[0020] Figure 3 This is a southwest isometric drawing of the assembly state of a soil sampling and compacting device capable of detecting moisture content proposed in the present invention.

[0021] Figure 4 This is a top view of the assembled state of a soil sampling and compacting device capable of detecting moisture content proposed by the present invention.

[0022] In the figure: 1 permeable water collection base, 2 supporting device, 3 bottom permeable plate, 4 permeable hole, 5 L-type permeable side plate, 6 L-type permeable side plate, 7 screw hole, 8 fixing screw, 9 vertical groove, 10 cross permeable partition plate, 11 fixing groove, 12 moisture content sensor, 13 data acquisition device, 14 compaction pad, 15 loading weight. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiment of the present invention to clearly and completely describe the technical solutions in the embodiment of the present invention. Obviously, the embodiment described is only a part of the embodiment of the present invention, not all embodiments.

[0024] Reference Figures 1 to 4 , a soil sampling and compacting device capable of detecting water content, comprising a permeable water collecting base 1, characterized in that a triangular supporting device 2 is arranged at the upper position of the four corners on the inner side of the permeable water collecting base 1, the supporting device is used to place a bottom permeable plate 3, the bottom permeable plate 3 is affixed with a filter cloth, and the bottom permeable plate is drilled with water holes 4 of equal distance and equal size, a soil sampling and compacting device capable of detecting water content, comprising two L-shaped permeable side plates 5 and 6, the two L-shaped permeable side plates are provided with screw holes 7 at the upper and lower ends of the permeable plates, the screw holes are used to pass through fixing screws 8, the inner sides of the two L-shaped permeable side plates 5 and 6 are affixed with nylon filter cloth, and ... Plates 5 and 6 are drilled with water-permeable holes 4 of equal distance and size, and a vertical groove 9 is engraved in the middle of the inner side of the L-shaped permeable side plate, and the vertical groove 9 clamps the position of the cross-permeable partition plate 10. The cross-permeable partition plate 10 is drilled with water-permeable holes 4 of equal distance and size, and the cross-permeable partition plate 10 is all covered with nylon filter cloth; a fixed groove 11 is engraved in the lower left area of ​​one of the side plates, and the fixed groove is used to fix the moisture content sensor 12. The moisture content sensor 12 is inserted into the compacted soil sample and connected to the data acquisition device 13. A soil sampling and compacting device that can detect moisture content includes a compaction pad 14, and the compaction pad is used to place a loading weight 15.

[0025] In the present invention, the permeable water collecting base 1 and the bottom permeable plate 3 can be disassembled to facilitate the removal and demoulding of the sample. The permeable water collecting base 1 is used to collect the polluted water that seeps out of the soil sample during the pressing process. The two L-shaped permeable side plates 5 and 6 are tightly fixed together by four fixing screws 8, and the internal vertical groove 9 can tightly clamp the cross permeable partition plate 10 to avoid displacement of the partition during the loading process. The compaction pad 14 is a wooden square pad with a thickness of 5 cm. The use of a thicker compaction pad clamped between the cross permeable partition plate 10 and the L-shaped permeable side plate can ensure that the pad will not overturn during the loading process, ensuring the regularity of the sample. The loading weight 15 can be loaded and unloaded according to the seepage amount of the soil sample and the specific conditions of the sample preparation. The permeable hole size is a circular hole with a diameter of 5 mm, and the distribution distance between two adjacent holes is 20 mm. The filter cloths affixed to the bottom permeable plate 3, the two L-shaped permeable side plates 5 and 6, and the cross permeable partition plate 10 are made of nylon with a mesh size of 400 or above, which is not easy to be damaged or rotten. The permeable water collecting base 1, the supporting device 2, the bottom permeable plate 3, the two L-shaped permeable side plates 5 and 6, and the fixing screws 8 of the cross permeable partition plate 10 are all made of stainless steel to avoid rust caused by long-term use and contamination of the sample.

[0026] Working principle: Add water to the soil to be sampled and mix it into a flowable mud state; first, stick filter paper on the upward side of the bottom permeable plate, the inner side of the two L-shaped permeable side plates, the downward side of the compaction pad and each side of the cross permeable partition plate, then place the permeable water collection base on the horizontal ground and install the permeable bottom plate, then place the cross permeable partition plate in the center of the permeable bottom plate, and then place the two L-shaped permeable side plates on the left and right sides of the cross permeable partition plate, and connect the two L-shaped permeable side plates together. Pay attention to fit the cross permeable partition plate into the vertical groove on the inside of the L-shaped permeable side plate. After docking, the screw holes should be completely aligned, then insert the four fixing screws into the screw holes respectively, and tighten them with a wrench to ensure that the two L-shaped permeable side plates and the cross-shaped permeable partition plate are tightly fixed together; then spread the mixed mud sample in the grid according to a layer of three centimeters. After laying one layer, use a stirring rod to stir the mud sample evenly to remove internal gas. After eliminating the holes and laying it to the predetermined height, the surface of the mud sample should be flat and free of air holes. Then place the compaction pad on the surface of the mud sample, making sure that the side with the filter paper is in contact with the mud sample. The height of the compaction pad is 5 cm and its size is exactly the same as the size of the inner wall of the grid. During the compaction process, the pad will move vertically downward without overturning or displacement. Then place the loading weight on the compaction pad. The weight of the loading weight can be gradually changed according to the water output and the data collected by the moisture content sensor. Finally, align the moisture content sensor with the fixed groove and insert it into the mud sample. The fixed groove will fix the moisture content sensor in the same position without changing. Then connect the moisture content sensor to the data acquisition device to obtain the real-time moisture change data of the sample. Next, rely on the weight of the loading weight to pressurize the sample. The excess water is squeezed out of the soil pores under the action of pressure. At this time, the soil pores are full of water. After a period of stillness, four saturated soil samples with the same physical indicators can be obtained.

Claims

1. A soil sampling and compacting device capable of detecting moisture content, comprising a permeable water collecting base (1), characterized in that: A triangular supporting device (2) is arranged at the upper part of the four corners on the inner side of the permeable water collecting base (1), and the supporting device is used to place the bottom permeable plate (3), the bottom permeable plate (3) is affixed with filter cloth, and the bottom permeable plate is drilled with permeable holes (4) of equal distance and equal size. A soil sampling and compacting device capable of detecting water content comprises two L-shaped permeable side plates (5) and (6), the two L-shaped permeable side plates are provided with screw holes (7) at the upper and lower ends of the permeable plates, the screw holes are used to pass through fixing screws (8), the inner sides of the two L-shaped permeable side plates (5) and (6) are affixed with nylon filter cloth, and the two L-shaped permeable side plates (5) and (6) are drilled with permeable holes of equal distance and equal size. The invention relates to a soil sample compacting device capable of detecting water content, wherein the soil sample compacting device comprises a water hole (4) and a vertical groove (9) engraved in the middle of the inner side of the L-shaped water-permeable side plate, wherein the vertical groove (9) is used to fix the position of the cross water-permeable partition plate (10), wherein the cross water-permeable partition plate (10) is drilled with water holes (4) of equal distance and equal size, and the cross water-permeable partition plate (10) is completely covered with nylon filter cloth; a fixed groove (11) is engraved in the lower left area of ​​one of the side plates, wherein the fixed groove is used to fix a water content sensor (12), wherein the water content sensor (12) is inserted into the compacted soil sample and connected to a data acquisition device (13); and a soil sample compacting device capable of detecting water content, comprising a compacting pad (14), wherein the compacting pad is used to place a loading weight (15).

2. The soil sampling and compacting device capable of detecting moisture content according to claim 1, characterized in that: The permeable water collecting base (1) and the bottom permeable plate (3) are separated from each other, and the permeable water collecting base (1) is used to collect polluted water seeping out of the soil sample during the pressing process.

3. The soil sampling and compacting device capable of detecting moisture content according to claim 1, characterized in that: The two L-shaped permeable side panels (5) and (6) are tightly fixed together by four fixing screws (8), and the internal vertical grooves (9) tightly clamp the cross permeable partition plate (10).

4. The soil sampling and compacting device capable of detecting moisture content according to claim 1, characterized in that: The compacting pad (14) is a wooden square pad with a thickness of 5 cm.

5. The soil sampling and compacting device capable of detecting moisture content according to claim 1, characterized in that: The loading weight (15) is loaded and unloaded according to the water seepage of the soil sample and the water content of the sample.

6. The soil sampling and compacting device capable of detecting moisture content according to claim 1, characterized in that: The water-permeable holes are circular holes with a diameter of 5 mm, and the distribution distance between two adjacent holes is 20 mm.

7. The soil sampling and compacting device capable of detecting moisture content according to claim 1, characterized in that: The filter cloths attached to the bottom water-permeable plate (3), the two L-shaped water-permeable side plates (5) and (6), and the cross water-permeable partition plate (10) are made of nylon with a mesh size of 400 or above.

8. The soil sampling and compacting device capable of detecting moisture content according to claim 1, characterized in that: The permeable water collecting base (1), the supporting device (2), the bottom permeable plate (3), the two L-shaped permeable side plates (5) and (6), the fixing screws (8), and the cross permeable partition plate (10) are all made of stainless steel.

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