Cement-soil permeation experiment device

Abstract

The utility model relates to the technical field of geotechnical material's determination, the utility model discloses a cement soil permeation experiment device, including the bottom plate, the water storage jar is installed on the upper surface of bottom plate, the experiment casing is located one side of water storage jar to establish on the bottom plate upper surface, the pressurizing pump is installed on the bottom plate, the input of pressurizing pump fixed mounting has the connecting pipe, and one end of connecting pipe is linked with the bottom of water storage jar, and the output of pressurizing pump fixed mounting has the water delivery pipe, this cement soil permeation experiment device, by adopting sealing mechanism, the device can ensure the efficient sealing between experiment casing and cement soil test piece, thereby reducing the water error caused by the clearance leakage, improve the accuracy of permeation test. Due to the improvement of sealing performance, the device can ensure that the sealing effect of each test is consistent, thereby improving the repeatability of experimental results, providing more reliable data support for engineering design and construction.

Description

Technical Field

[0001] This utility model relates to the field of geotechnical material testing technology, specifically a cement-soil permeability test device. Background Technology

[0002] With the rapid development of infrastructure construction in my country, cement-soil has become an important foundation treatment material, widely used in projects such as reinforcing soft soil foundations, seepage barriers, and diaphragm walls. The permeability of cement-soil is one of the key indicators for evaluating its engineering performance, and it is of great significance to the safety and stability of projects.

[0003] Currently, there are two main methods for testing the permeability of cement-soil: field tests and laboratory tests. While field tests can reflect actual working conditions, they are greatly affected by environmental factors, and the sealing effect between the experimental chamber and the cement-soil sample is difficult to guarantee. This allows a small amount of water to flow through the gap into the final measuring device, affecting the accuracy of the experimental results. Therefore, we propose a cement-soil permeability testing device to solve the above-mentioned problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a cement-soil permeability test device that solves the problem of difficulty in ensuring the sealing effect between the test chamber and the cement-soil sample due to the significant influence of environmental factors.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a cement-soil permeability test device, comprising a base plate;

[0006] A water storage tank is installed on the upper surface of the base plate;

[0007] The experimental shell is located on one side of the water storage tank and is disposed on the upper surface of the base plate;

[0008] A pressure pump is installed on the base plate. A connecting pipe is fixedly installed at the input end of the pressure pump, and one end of the connecting pipe is connected to the bottom of the water storage tank. A water delivery pipe is fixedly installed at the output end of the pressure pump, and the other end of the water delivery pipe is connected to the bottom of the experimental shell.

[0009] A permeable stone is placed at the bottom of the inner cavity of the experimental shell, and a cement-soil specimen is placed on the upper surface of the permeable stone.

[0010] A sealing mechanism, installed on the experimental housing, is used to seal the opening of the experimental housing;

[0011] A sealing mechanism, installed on the experimental shell, is used to seal the gap between the cement-soil specimen and the experimental shell;

[0012] A drain pipe is fixedly connected to the top of the experimental housing, and a control valve is installed on the drain pipe;

[0013] A measuring cylinder is placed on the base plate, corresponding to the drain pipe.

[0014] Preferably, a control valve for sealing is installed on the water supply pipe, a pressure gauge is installed at the end of the water supply pipe near the experimental shell, and a valve is installed on the connecting pipe.

[0015] Preferably, an insert is fixed on the upper surface of the base plate near the measuring cylinder, and the measuring cylinder is inserted into the insert for stable connection and positioning.

[0016] Preferably, the sealing mechanism includes a cover plate disposed at the opening of the experimental shell, a first connecting block arranged symmetrically fixed on the surface of the cover plate, and a second connecting block disposed below the first connecting block. The second connecting block is fixed on the surface of the experimental shell, and an electric telescopic rod is fixedly installed on the surface of the second connecting block. The output end of the electric telescopic rod is connected to the first connecting block.

[0017] Preferably, a sealing ring is fixedly installed on the lower surface of the cover plate.

[0018] Preferably, the sealing mechanism includes a frame fixed to the surface of the experimental shell and first limiting rods symmetrically arranged within the frame. A movable block is provided on the frame, and the movable block slides on the surface of the two sets of first limiting rods through through holes. A crossbar is fixedly installed at the top of the movable block, and an adjusting sleeve is rotatably installed at one end of the crossbar via a rotating shaft. An adjusting plate is slidably installed on the adjusting sleeve, and a locking bolt for pressing and locking the adjusting plate is threadedly connected to the adjusting sleeve through a threaded hole. A cylinder is provided at one end of the adjusting plate, and the bottom of the cylinder has a conical structure design. A heating coil is installed on the surface of the cylinder, and a heat insulation shell for heat insulation and shielding the heating coil is installed on the cylinder. The heat insulation shell and the adjusting plate are fixedly connected.

[0019] Preferably, a rectangular groove is provided on one side of the movable block, and a second limiting rod is provided in the rectangular groove. The second limiting rod is fixedly connected to the movable block. A locking block is also provided in the rectangular groove. The sliding hole of the locking block slides on the surface of the second limiting rod. The two ends of the frame are provided with slots that are adapted to the locking block.

[0020] Beneficial effects

[0021] This invention provides a cement-soil permeability testing device. Compared with the prior art, it has the following advantages:

[0022] Beneficial effects:

[0023] This cement-soil permeability testing apparatus employs a sealing mechanism to ensure an efficient seal between the experimental shell and the cement-soil specimen, thereby reducing water volume errors caused by gap leakage and improving the accuracy of permeability testing. Due to the improved sealing performance, the apparatus ensures consistent sealing results for each test, enhancing the repeatability of experimental results and providing more reliable data support for engineering design and construction. Simultaneously, a sealing mechanism is used to seal the top of the experimental shell, preventing external environmental influences from causing moisture evaporation and further improving data accuracy. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2 This is a partial sectional view of the experimental shell structure of this utility model;

[0026] Figure 3 This is a schematic diagram of the sealing mechanism of this utility model.

[0027] In the diagram: 101, base plate; 102, water storage tank; 103, pressurization pump; 104, control valve; 105, water supply pipe; 106, experimental shell; 107, permeable stone; 108, cement-soil specimen; 109, drainage pipe; 110, measuring cylinder; 2, sealing mechanism; 201, cover plate; 202, electric telescopic rod; 203, sealing ring; 3, sealing mechanism; 301, frame; 302, first limiting rod; 303, moving block; 304, crossbar; 305, adjusting sleeve; 306, adjusting plate; 307, locking bolt; 308, cylinder; 309, heating ring; 310, heat insulation shell; 311, locking block; 312, second limiting rod; 313, slot. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] like Figure 1-3 As shown:

[0030] A cement-soil permeability test device includes a base plate 101;

[0031] Water storage tank 102 is installed on the upper surface of base plate 101;

[0032] The experimental shell 106 is located on one side of the water storage tank 102 and is provided on the upper surface of the base plate 101;

[0033] A pressure pump 103 is installed on a base plate 101. A connecting pipe is fixedly installed at the input end of the pressure pump 103, and one end of the connecting pipe is connected to the bottom of the water storage tank 102. A water delivery pipe 105 is fixedly installed at the output end of the pressure pump 103, and the other end of the water delivery pipe 105 is connected to the bottom of the experimental shell 106. A control valve 104 for sealing is installed on the water delivery pipe 105. A pressure gauge is installed at the end of the water delivery pipe 105 near the experimental shell 106. A valve is installed on the connecting pipe.

[0034] Permeable stone 107 is located at the bottom of the inner cavity of experimental shell 106, and cement-soil specimen 108 is provided on the upper surface of permeable stone 107.

[0035] The sealing mechanism 2 is installed on the experimental shell 106 and is used to seal the opening of the experimental shell 106. The sealing mechanism 2 includes a cover plate 201 provided at the opening of the experimental shell 106. A first connecting block arranged symmetrically is fixed on the surface of the cover plate 201, and a second connecting block is provided below the first connecting block. The second connecting block is fixed on the surface of the experimental shell 106, and an electric telescopic rod 202 is fixedly installed on the surface of the second connecting block. The output end of the electric telescopic rod 202 is connected to the first connecting block.

[0036] A sealing ring 203 is fixedly installed on the lower surface of the cover plate 201;

[0037] A sealing mechanism 3, installed on the experimental shell 106, is used to seal the gap between the cement-soil specimen 108 and the experimental shell 106. The sealing mechanism 3 includes a frame 301 fixed to the surface of the experimental shell 106 and first limiting rods 302 symmetrically arranged within the frame 301. A movable block 303 is provided on the frame 301. The movable block 303 slides on the surface of the two sets of first limiting rods 302 through through holes. A crossbar 304 is fixedly installed at the top of the movable block 303. An adjusting sleeve 305 is rotatably installed at one end of the crossbar 304 via a rotating shaft. An adjusting plate 306 is slidably installed on the adjusting sleeve 305. The adjusting sleeve 305 is threadedly connected to the adjusting plate 306 through threaded holes. The locking bolt 307 is squeezed and locked. One end of the adjusting plate 306 is provided with a cylinder 308. The bottom of the cylinder 308 is designed with a conical structure. A heating ring 309 is installed on the surface of the cylinder 308. A heat insulation shell 310 is installed on the cylinder 308 to insulate and shield the heating ring 309. The heat insulation shell 310 and the adjusting plate 306 are fixedly connected. A rectangular groove is opened on one side of the moving block 303, and a second limiting rod 312 is provided in the rectangular groove. The second limiting rod 312 and the moving block 303 are fixedly connected. A locking block 311 is also provided in the rectangular groove. The sliding hole opened in the locking block 311 slides on the surface of the second limiting rod 312. The two ends of the frame 301 are provided with slots 313 that are adapted to the locking block 311.

[0038] A drain pipe 109 is fixedly connected to the top of the experimental housing 106, and a valve is installed on the drain pipe 109;

[0039] A measuring cylinder 110 is mounted on a base plate 101, corresponding to a drain pipe 109. A insert is fixed on the upper surface of the base plate 101 near the measuring cylinder 110, and the measuring cylinder 110 is inserted into the insert for stable connection and positioning.

[0040] In this implementation plan: When using the cement-soil permeability test device, the electric telescopic rod 202 is first activated, which in turn drives the cover plate 201 to move upward, so that the cover plate 201 is separated from the test shell 106, thus releasing the blockage on the test shell 106;

[0041] The cement-soil specimen 108 was then placed inside the experimental shell 106 and positioned above the permeable stone 107.

[0042] The paraffin block is placed inside the cylinder 308, and the moving block 303 is pushed to slide on the first limiting rod 302. The first limiting rod 302 can limit the moving block 303 and ensure the stability of the moving block 303.

[0043] While the moving block 303 is moving, the locking block 311 is pushed to move upward on the second limiting rod 312 and slides upward, so that the moving block 303 is disengaged from the slot 313 opened in the frame 301, thereby releasing the connection and locking between the moving block 303 and the frame 301, thus realizing the subsequent movement of the moving block 303.

[0044] The movable block 303 can be moved from one end of the frame 301 to the other. At this time, the second limiting rod 312 corresponds to the slot 313. The second limiting rod 312 moves downward due to its own weight, slides on the second limiting rod 312, and falls into the slot 313, thus locking the frame 301 and the movable block 303. When the movable block 303 moves to the other end of the frame 301, the pivot on the crossbar 304 is concentrically set with the experimental housing 106. First, through rotation... The locking bolt 307 is moved to release the pressure on the adjusting plate 306, thereby allowing the adjusting plate 306 to move on the adjusting sleeve 305 to achieve lateral adjustment. During the movement of the adjusting plate 306, the movement of the adjusting plate 306 is stopped when the discharge port at the bottom of the cylinder 308 corresponds to the annular gap between the experimental shell 106 and the cement-soil specimen 108. The adjusting plate 306 is then pressed by rotating the locking bolt 307 in the opposite direction, thereby locking the connection between the adjusting plate 306 and the adjusting sleeve 305.

[0045] Then, the heating coil 309 is turned on, and the heat generated is transferred to the inside of the cylinder 308, heating the wax inside the cylinder 308 to its melting point, making it liquid. Then, the liquid wax is discharged through the discharge port at the bottom of the cylinder 308 into the gap between the experimental shell 106 and the cement-soil specimen 108. At the same time, the adjusting plate 306 is rotated, causing the cylinder 308 to rotate synchronously around the experimental shell 106 once, distributing the liquid wax evenly into the gap of the circle. When the wax cools and solidifies, it forms a sealing layer.

[0046] Next, the sealing mechanism 3 is removed from the top of the experimental housing 106, and then the electric telescopic rod 202 is activated to move the cover plate 201 down until it seals the opening at the top of the experimental housing 106. At the same time, a sealing ring 203 is fixedly installed at the bottom of the cover plate 201. The sealing performance between the cover plate 201 and the experimental housing 106 is enhanced by the setting of the sealing ring 203.

[0047] Then, the pressure pump 103 is started, and the control valve 104 is opened. Simultaneously, the valve installed on the drain pipe 109 is opened to drain the water inside the storage tank 102 into the connecting pipe and the water delivery pipe 105, and then into the experimental shell 106. Under a certain pressure, after a certain time, the water flows towards the permeable stone 107, passing through the permeable stone 107 and the cement-soil specimen 108 in sequence, and is discharged through the drain pipe 109, finally flowing into the measuring cylinder 110 for collection. The weight of the permeated water flowing into the measuring cylinder 110 can be obtained by weighing the mass of the measuring cylinder 110 in real time. Then, according to Darcy's law, the permeability coefficient of the cement-soil is calculated using the collected permeate water mass data. The permeability coefficient is an important indicator for measuring the permeability performance of cement-soil, usually expressed as the amount of water per meter of water column.

[0048] This solution employs a sealing mechanism 3, which ensures an efficient seal between the experimental shell 106 and the cement-soil specimen 108, thereby reducing water volume errors caused by gap leakage and improving the accuracy of the permeability test. Due to the improved sealing performance, the device ensures consistent sealing results for each test, thus improving the repeatability of experimental results and providing more reliable data support for engineering design and construction. Simultaneously, the sealing mechanism 2, used in conjunction with the sealing mechanism 2, seals the top of the experimental shell 106 to prevent external environmental influences from causing moisture evaporation, further improving data accuracy.

[0049] It should be noted that all electrical equipment involved in the product is powered by an external power source. The solution also includes an electrical control cabinet, which is installed on the equipment. During use, each piece of electrical equipment can be started and operated separately through the electrical control cabinet. The power connection method of each piece of electrical equipment is a mature existing technology and is well known to those in the field, so it will not be elaborated further here.

[0050] A temperature detector is installed on the heat insulation housing 310, which can monitor its temperature in real time. All contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0051] The working principle and usage process of this utility model are as follows: When using this cement-soil permeability test device, the electric telescopic rod 202 is activated, the cover plate 201 is lifted, the sealing of the test shell 106 is released, the cement-soil specimen 108 is placed inside the test shell 106, above the permeable stone 107, the paraffin block is placed into the cylinder 308, and the moving block 303 is pushed to slide along the first limiting rod 302 to ensure stable movement. At the same time, the locking block 311 is moved to disengage the moving block 303 from the slot 313 of the frame 301, releasing the lock. The moving block 303 is then moved to the other end of the frame 301, and the second limiting rod 312 is engaged in the slot 313. To achieve locking, the adjusting plate 306 is adjusted by tightening bolt 307 to ensure that the bottom discharge port of cylinder 308 corresponds to the gap of experimental shell 106. The wax is heated to the melting point and discharged through cylinder 308 into the gap of experimental shell 106. The cylinder 308 is rotated to form a sealing layer. The sealing mechanism 3 is removed, and the cover plate 201 is lowered to seal the experimental shell 106. The sealing performance is enhanced by sealing ring 203. The sealing mechanism 3 is removed, and the cover plate 201 is lowered to seal the experimental shell 106. The sealing performance is enhanced by sealing ring 203. The weight of water flowing through permeable stone 107 and cement soil specimen 108 to measuring cylinder 110 is measured, and the permeability coefficient is calculated.

[0052] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A cement-soil permeability test apparatus, characterized in that: Including the base plate (101); A water storage tank (102) is installed on the upper surface of the base plate (101); The experimental shell (106) is located on one side of the water storage tank (102) and is disposed on the upper surface of the base plate (101); A pressure pump (103) is installed on the base plate (101). A connecting pipe is fixedly installed at the input end of the pressure pump (103), and one end of the connecting pipe is connected to the bottom of the water storage tank (102). A water delivery pipe (105) is fixedly installed at the output end of the pressure pump (103), and the other end of the water delivery pipe (105) is connected to the bottom of the experimental shell (106). A permeable stone (107) is provided at the bottom of the inner cavity of the experimental shell (106), and a cement-soil specimen (108) is provided on the upper surface of the permeable stone (107); A sealing mechanism (2) is installed on the experimental housing (106) to seal the opening of the experimental housing (106); A sealing mechanism (3) is installed on the experimental shell (106) to seal the gap between the cement-soil specimen (108) and the experimental shell (106); A drain pipe (109) is fixedly connected to the top of the experimental housing (106), and a control valve is installed on the drain pipe (109); A measuring cylinder (110) is provided on the base plate (101) and corresponds to the drain pipe (109).

2. The cement-soil permeability test apparatus according to claim 1, characterized in that: A control valve (104) for sealing is installed on the water supply pipe (105). A pressure gauge is installed at one end of the water supply pipe (105) near the experimental shell (106), and a valve is installed on the connecting pipe.

3. The cement-soil permeability test apparatus according to claim 1, characterized in that: A tube is fixed on the upper surface of the base plate (101) near the measuring cylinder (110), and the measuring cylinder (110) is inserted into the tube for stable insertion and positioning.

4. The cement-soil permeability test apparatus according to claim 1, characterized in that: The sealing mechanism (2) includes a cover plate (201) provided at the opening of the experimental shell (106). A first connecting block arranged symmetrically is fixed on the surface of the cover plate (201), and a second connecting block is provided below the first connecting block. The second connecting block is fixed on the surface of the experimental shell (106), and an electric telescopic rod (202) is fixedly installed on the surface of the second connecting block. The output end of the electric telescopic rod (202) is connected to the first connecting block.

5. The cement-soil permeability test apparatus according to claim 4, characterized in that: A sealing ring (203) is fixedly installed on the lower surface of the cover plate (201).

6. The cement-soil permeability test apparatus according to claim 1, characterized in that: The sealing mechanism (3) includes a frame (301) fixed to the surface of the experimental shell (106) and first limiting rods (302) symmetrically arranged within the frame (301). A movable block (303) is provided on the frame (301). The movable block (303) slides on the surfaces of the two sets of first limiting rods (302) through through holes. A crossbar (304) is fixedly installed at the top of the movable block (303). An adjusting sleeve (305) is rotatably installed at one end of the crossbar (304) via a pivot. An adjusting plate (306) is slidably installed. The adjusting sleeve (305) is threadedly connected to a locking bolt (307) that presses and locks the adjusting plate (306) through a threaded hole. A cylindrical body (308) is provided at one end of the adjusting plate (306). The bottom of the cylindrical body (308) is designed with a conical structure. A heating coil (309) is installed on the surface of the cylindrical body (308). A heat insulation shell (310) is installed on the cylindrical body (308) to insulate and shield the heating coil (309). The heat insulation shell (310) and the adjusting plate (306) are fixedly connected.

7. The cement-soil permeability test apparatus according to claim 6, characterized in that: The movable block (303) has a rectangular groove on one side, and a second limiting rod (312) is provided in the rectangular groove. The second limiting rod (312) and the movable block (303) are fixedly connected. A locking block (311) is also provided in the rectangular groove. The sliding hole of the locking block (311) slides on the surface of the second limiting rod (312). The two ends of the frame (301) have slots (313) that are adapted to the locking block (311).

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