Permeation chamber and permeameter for permeability test of rock-soil test piece
By designing the infiltration chamber and infiltration instrument, and using a sealing sleeve and a half-mold to clamp the soil and rock specimens, the upper and lower ends of the infiltration chamber are kept open, thus solving the problem of test data distortion in the existing technology and achieving the test effect of free flow.
Patent Information
- Application Number
- CN202520066173.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-10
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2035-01-10
AI Technical Summary
In existing permeability tests of soil and rock specimens, the presence of permeable stones makes it impossible to fully simulate the liquid permeation pattern of soil and rock specimens in a free state in the natural environment, resulting in distorted and erroneous test data.
Design a permeation chamber and permeameter, using a sealing sleeve and a half-mold to clamp the soil and rock specimen, ensuring that the upper and lower ends of the permeation chamber are open, and combining a solution spraying mechanism and a sealing ring to achieve free flow testing.
It enables permeability testing of soil and rock specimens under simulated natural conditions, reduces test data errors, and meets the testing requirements for free flow.
Smart Images
Figure CN223808313U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to experimental apparatus technical field, especially a kind of permeation chamber and permeameter for rock-soil test piece permeability test. BACKGROUND
[0002] Rock-soil material used in civil engineering is a typical porous medium, and the pores between particles in rock-soil are interconnected to form water-permeable channels. Therefore, the flow of water in rock-soil pores is called water seepage, and the property of rock-soil that can be passed through by water is called rock-soil permeability, which is also one of the basic mechanical properties of rock-soil.
[0003] Currently, rock-soil test piece permeability test is usually carried out by water head pressure difference on the upper and lower sides of the rock-soil test piece, that is, water-permeable stones are arranged on the upper and lower sides of the rock-soil test piece, and appropriate water pressure is applied for permeability test. However, due to the permeability resistance or adverse effects of water-permeable stones, it is impossible to completely simulate the liquid permeation pattern of rock-soil test piece in a free state in a natural environment, resulting in distortion and error of test data. SUMMARY
[0004] Therefore, the utility model provides a permeation chamber and permeameter for rock-soil test piece permeability test, which can ensure that the upper and lower end faces of the permeation chamber are in an open state, so as to ensure that rock-soil test piece is tested for permeability in a free state in a simulated natural environment, thereby meeting the test requirements of free seepage.
[0005] To achieve the above-mentioned purpose, the utility model provides the technical scheme as follows:
[0006] The utility model provides a permeation chamber for rock-soil test piece permeability test, which comprises an upper cover, a lower cover, an elastic sealing rubber sleeve, and two rigid half-molds. The sealing rubber sleeve has a containing cavity penetrating through its upper and lower surfaces, and the containing cavity is used for containing rock-soil test piece. Two half-molds are respectively arranged on the outer circumferential surface of the sealing rubber sleeve. The two half-molds are detachably connected and used for clamping rock-soil test piece in the sealing rubber sleeve, and together with the sealing rubber sleeve form a permeation chamber body with upper and lower openings. The upper opening and the lower opening of the permeation chamber body are respectively communicated with the containing cavity. The upper cover and the lower cover are both provided with a water flow channel for communicating with the containing cavity. The upper cover is arranged at the upper opening, and the lower cover is arranged at the lower opening.
[0007] Further, the sealing rubber sleeve is a rubber sleeve or a silicone rubber sleeve.
[0008] Further, the two half-molds are respectively semicircular.
[0009] Further, a first sealing ring is arranged between the upper cover and the permeation chamber body, the first sealing ring is sleeved on the upper opening, and the first sealing ring is in sealing cooperation with the sealing rubber sleeve and the upper cover respectively.
[0010] Further, the first sealing ring is a metal sealing ring.
[0011] Further, a second sealing ring is arranged between the lower cover and the permeation chamber body, the second sealing ring is sleeved on the lower opening, and the second sealing ring is in sealing cooperation with the sealing rubber sleeve and the lower cover respectively.
[0012] Further, the second sealing ring is a metal sealing ring.
[0013] The utility model provides a kind of permeameter, including solution spraying mechanism, solution storage container, solution collection container and the permeation chamber for above rock-soil test piece permeability test;The water outlet of the solution storage container is connected the water inlet of the solution spraying mechanism, the water outlet of the solution spraying mechanism is connected the water inlet of the permeation chamber for rock-soil test piece permeability test, the water outlet of the permeation chamber for rock-soil test piece permeability test is connected the water inlet of the solution collection container.
[0014] Further, the solution spraying mechanism includes a diaphragm pump.
[0015] Further, the solution collection container is provided with a liquid level sensor for real-time monitoring of water level height therein.
[0016] The technical scheme provided by the utility model has the following beneficial effects:
[0017] By arranging two half molds around the outer circumferential surface of the sealing rubber sleeve respectively and forming a permeation chamber body with upper and lower openings together with the sealing rubber sleeve, when the rock-soil test piece is placed in the containing cavity of the sealing rubber sleeve for permeability test, the rock-soil test piece is clamped and fixed in the sealing rubber sleeve by the two half molds, which can ensure that the upper and lower end surfaces of the permeation chamber are in an open state to ensure that the rock-soil test piece is tested for permeability under free form in simulated natural environment, thereby meeting the test requirements of free seepage. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 It is the exploded view of the permeation chamber for rock-soil test piece permeability test in embodiment one;
[0019] Figure 2 It is the sectional view of the permeation chamber for rock-soil test piece permeability test in embodiment one with rock-soil test piece placed;
[0020] Figure 3The is the appearance view of the permeation chamber for testing the permeability of the rock-soil sample in the embodiment one. DETAILED DESCRIPTION
[0021] To further illustrate the embodiments, the utility model provides the drawings. These drawings are part of the utility model disclosure, which mainly serves to illustrate the embodiments, and can be combined with the relevant description of the specification to explain the operating principle of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementations and the advantages of the utility model. The components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.
[0022] The utility model will be further illustrated in conjunction with the drawings and specific embodiments.
[0023] Embodiment one
[0024] Refer to Figures 1 to 3 As shown in the figure, embodiment one provides a permeation chamber (hereinafter referred to as a permeation chamber) for testing the permeability of a rock-soil sample, which is used to place a rock-soil sample inside and complete the permeability test of the rock-soil sample.
[0025] As shown in the figure Figure 3 The permeation chamber includes an upper cover 6, a lower cover 5, an elastic sealing rubber sleeve 3 with a containing cavity 31 penetrating its upper and lower surfaces, and two rigid half-molds 2 as shown in the figure Figure 1
[0026] As shown in the figure Figure 2 Two half-molds 2 are respectively arranged around the outer circumferential surface of the sealing rubber sleeve 3, and the two half-molds 2 are fastened and connected by bolts to clamp the outer circumferential surface of the sealing rubber sleeve 3, while ensuring that the rock-soil sample 1 clamped in the sealing rubber sleeve 3, and the two half-molds 2 and the sealing rubber sleeve 3 together form a permeation chamber body 100 with upper and lower openings.
[0027] The upper opening and the lower opening of the permeation chamber body 100 are respectively communicated with the containing cavity 31, the upper cover 6 and the lower cover 5 are both provided with a water flow channel for communicating with the containing cavity 31, the upper cover 6 is arranged at the upper opening of the permeation chamber body 100, and the lower cover 5 is arranged at the lower opening of the permeation chamber body 100, so that the test solution can enter from the opening of the upper cover 6, then pass through the upper opening of the permeation chamber body 100, the rock-soil sample 1 in the sealing rubber sleeve 3 and the lower opening of the permeation chamber body 100, and then flow out from the opening of the lower cover 5, so as to complete the permeability test of the rock-soil sample 1 in this embodiment.
[0028] In this embodiment, the sealing rubber sleeve 3 is a silicone sleeve in a circular shape. Of course, in other embodiments, the sealing rubber sleeve 3 can also be a rubber sleeve.
[0029] Two half-molds 2 are respectively semicircular to match the shape of the sealing sleeve 3, so as to ensure clamping of the rock-soil sample 1 in the sealing sleeve 3 and prevent the rock-soil sample 1 from being separated from the main body 100 of the permeation chamber. Of course, in other embodiments, the shape of the half-mold 2 can also be a half-square frame or a half-ellipse, and the specific shape of the half-mold 2 is determined according to the shape of the sealing sleeve 3 and the rock-soil sample 1.
[0030] In specific implementation, the size of the two half-molds 2 in the up-down direction is smaller than that of the sealing sleeve 3, so that after the two half-molds 2 are centrally locked on the sealing sleeve 3, the upper and lower ends of the sealing sleeve 3 respectively protrude from the upper and lower ends of the two half-molds 2 and form the upper opening and the lower opening of the main body 100 of the permeation chamber.
[0031] As shown in Figure 1 and Figure 2 , a first sealing ring 4 is arranged between the upper cover 6 and the main body 100 of the permeation chamber, and the first sealing ring 4 is a metal sealing ring. The first sealing ring 4 is sleeved on the upper opening of the main body 100 of the permeation chamber, and the first sealing ring 4 is in sealing cooperation with the sealing sleeve 3 and the upper cover 6 respectively, so as to prevent side leakage at the upper opening of the main body 100 of the permeation chamber. The opening outer wall of the upper cover 6 protruding upward is sleeved with an access pipe 8 for connecting other components and forms the upper end face of the permeation chamber.
[0032] As shown in Figure 1 and Figure 2 , a second sealing ring 7 is arranged between the lower cover 5 and the main body 100 of the permeation chamber, and the second sealing ring 7 is a metal sealing ring. The second sealing ring 7 is sleeved on the lower opening of the main body 100 of the permeation chamber, and the second sealing ring 7 is in sealing cooperation with the sealing sleeve 3 and the lower cover 5 respectively, so as to prevent side leakage at the lower opening of the main body 100 of the permeation chamber and form the lower end face of the permeation chamber.
[0033] By respectively sleeving the two half-molds 2 on the outer circumferential surface of the sealing sleeve 3 and forming the main body 100 of the permeation chamber with the sealing sleeve 3, the rock-soil sample 1 is clamped and fixed in the sealing sleeve 3 when the rock-soil sample 1 is placed in the accommodating cavity 31 of the sealing sleeve 3 for permeability test. In this way, the upper and lower end faces of the permeation chamber can be kept in an open state, so as to ensure that the rock-soil sample 1 is tested for permeability in a free form under simulated natural environment, thereby meeting the test requirements of free seepage and preventing errors in permeability test data.
[0034] Of course, in other embodiments, the first sealing ring 4 and the second sealing ring 7 can also be plastic sealing rings, so that sealing cooperation can also be achieved.
[0035] Embodiment Two
[0036] The second embodiment provides a permeameter, which comprises a solution spraying mechanism, a solution storage container, a solution collecting container and the permeameter of the first embodiment.
[0037] The water outlet of the solution storage container is connected to the water inlet of the solution spraying mechanism, the water outlet of the solution spraying mechanism is connected to the water inlet of the permeameter for testing the permeability of the rock-soil sample, and the water outlet of the permeameter for testing the permeability of the rock-soil sample is connected to the water inlet of the solution collecting container.
[0038] The solution spraying mechanism comprises a diaphragm pump, which can ensure that the permeameter of the embodiment can be used for normal rock-soil sample permeability testing with the test solution containing impurity suspensions and without abnormal phenomena such as blockage of the pipeline of the permeameter.
[0039] The solution collecting container is provided with a liquid level sensor for monitoring the water level in the solution collecting container in real time, and the output end of the liquid level sensor is connected to the system data acquisition control host of the permeameter to complete the processing, display and recording of the test data.
[0040] When the permeameter of the embodiment is used for rock-soil sample permeability testing, the test solution containing impurity suspensions is pumped from the solution storage container to the solution spraying mechanism through the diaphragm pump, and then the test solution is delivered to the permeameter through the pipeline of the solution spraying mechanism to realize spraying of the test solution onto the surface of the rock-soil sample in the permeameter, and then the solution permeation is completed, and then the lower surface of the rock-soil sample is permeated until the test solution permeated from the lower end of the rock-soil sample is delivered to the solution collecting container, and the water level in the solution collecting container is monitored in real time through the liquid level sensor, and the permeation amount of the solution per unit time is converted into the permeation flow rate of the rock-soil sample in real time through the computer software of the system data acquisition control host, so that the permeation flow rate of the rock-soil sample is measured.
[0041] Although the utility model is specifically shown and introduced in combination with the preferred embodiments, it should be understood by those skilled in the art that various changes can be made to the utility model in form and details without departing from the spirit and scope of the utility model defined in the appended claims, and all the changes are within the protection scope of the utility model.
Claims
1. A permeation chamber for use in permeability testing of geotechnical test specimens, characterised in that: The device comprises an upper cover, a lower cover, a sealing rubber sleeve with elasticity, and two rigid half-molds; The sealing rubber sleeve has a containing cavity penetrating through its upper and lower surfaces, which is used for containing a rock-soil test piece; the two half-molds are respectively arranged around the outer circumferential surface of the sealing rubber sleeve; the two half-molds are detachably connected and used for clamping the rock-soil test piece in the sealing rubber sleeve, and together with the sealing rubber sleeve form a permeation chamber main body with upper and lower openings; the upper and lower openings of the permeation chamber main body are respectively communicated with the containing cavity. The upper cover and the lower cover are both provided with a water flow channel for communicating with the containing cavity, the upper cover is arranged at the upper opening, and the lower cover is arranged at the lower opening.
2. The permeameter for testing permeability of a geotechnical test piece according to claim 1, characterized in that: The sealing rubber sleeve is a rubber sleeve or a silica gel sleeve.
3. The permeameter for testing permeability of a geotechnical test piece according to claim 1, wherein: The two half-molds are both semicircular.
4. The permeameter for testing permeability of a geotechnical test piece according to any one of claims 1 to 3, characterized in that: A first sealing ring is arranged between the upper cover and the permeation chamber main body, the first sealing ring is sleeved on the upper opening, and the first sealing ring is respectively in sealing cooperation with the sealing rubber sleeve and the upper cover.
5. The permeameter for testing permeability of a geotechnical test piece according to claim 4, wherein: The first sealing ring is a metal sealing ring.
6. The permeameter for testing permeability of a geotechnical test piece according to any one of claims 1 to 3, characterized in that: A second sealing ring is arranged between the lower cover and the permeation chamber main body, the second sealing ring is sleeved on the lower opening, and the second sealing ring is respectively in sealing cooperation with the sealing rubber sleeve and the lower cover.
7. The permeameter for testing permeability of a geotechnical test piece according to claim 6, wherein: The second sealing ring is a metal sealing ring.
8. An osmometer characterized by: The device comprises a solution spraying mechanism, a solution storage container, a solution collecting container, and the permeation chamber for rock-soil test piece permeability test according to any one of claims 1-7; the water outlet of the solution storage container is connected with the water inlet of the solution spraying mechanism, the water outlet of the solution spraying mechanism is connected with the water inlet of the permeation chamber for rock-soil test piece permeability test, and the water outlet of the permeation chamber for rock-soil test piece permeability test is connected with the water inlet of the solution collecting container.
9. The permeation apparatus of claim 8, wherein: The solution spraying mechanism comprises a diaphragm pump.
10. The permeation apparatus of claim 8, wherein: The solution collecting container is provided with a liquid level sensor for monitoring the water level in the solution collecting container in real time. The solution spraying mechanism comprises a diaphragm pump.