Device for measuring permeability of single fracture in clay

By designing a permeability container including ring knife, tangent and lower cover, the problem of measuring permeability coefficient of single fissures of different widths in clay is solved, and effective permeability determination is achieved.

CN222561501UActive Publication Date: 2025-03-04ZHENGZHOU UNIV
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Patent Information

Application Number
CN202420622327.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-03-28
Publication Date
2025-03-04
Estimated Expiration
2034-03-28

AI Technical Summary

Technical Problem

Existing experimental devices cannot determine the permeability coefficient of single fissures of different widths in clay.

Method used

A permeability container including an annular knife, a tangent and a lower cover was designed to cut clay into a single fissure of different widths by cutting the clay knife, and the permeability determination of water was ensured using permeability of permeability of the water.

Benefits of technology

The effective measurement of the permeability coefficient of single fissures of different widths in clay is achieved, and the problem that existing devices cannot perform such measurements.

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Abstract

The utility model provides a device for measuring permeability of a single fracture in clay, and relates to the field of geotechnical tests. The device comprises a water supply bottle, a variable water head pipe and a permeation container of which the placement heights are sequentially reduced, the permeation container comprises a cutting ring, and two symmetrically-distributed notches are formed in the side face of the cutting ring; the diameter of the cross section of the tangent line is smaller than the width of the notch; the bottom of the lower cover is provided with a water outlet and an exhaust port, the upper surface of the lower cover is provided with a lantern ring for placing a cutting ring, the cutting ring is sleeved in the lantern ring, the top of the lantern ring is provided with an upper cover, the upper cover is provided with a water outlet, the lower cover and the upper cover can be hermetically buckled on the lantern ring, and permeable stones are arranged above the lower cover and below the upper cover. When the lower cover and the upper cover are buckled on the lantern ring, the two permeable stones are respectively positioned at the upper end and the lower end of to-be-detected clay in the cutting ring. The device disclosed by the utility model solves the problem that an existing experimental device cannot measure the permeability coefficients of single fractures with different widths in clay.
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Description

Technical Field

[0001] The utility model relates to the technical field of geotechnical testing, in particular to a single crack permeability measuring device in clay. Background Art

[0002] Permeability coefficient is a quantitative indicator of soil permeability. It is also a basic parameter that must be used in seepage calculations. It plays an important role in soil improvement and various underground engineering construction. At present, soil permeameters are divided into two types: constant head and variable head. The constant head test is suitable for measuring the permeability coefficient of sandy soil with high permeability, and the variable head test is suitable for measuring the permeability coefficient of clay soil with low permeability. Both the constant head method and the variable head method are measured in the laboratory. The existing experimental equipment cannot measure the permeability coefficient of single cracks of different widths in clay. Utility Model Content

[0003] In view of the deficiencies in the prior art, the present invention aims to provide a device for measuring the permeability of a single crack in clay, which solves the problem that the existing experimental devices are unable to measure the permeability coefficient of a single crack of different widths in clay.

[0004] The purpose of this disclosure can be achieved through the following technical solutions:

[0005] A permeation container, comprising:

[0006] A ring knife, wherein the side of the ring knife is provided with two symmetrically distributed cutouts;

[0007] a tangent line having a cross-sectional diameter that is smaller than a width of the cut; and

[0008] A lower cover, wherein a water outlet and an exhaust port are arranged at the bottom of the lower cover, a sleeve ring for placing the ring knife is arranged on the upper surface of the lower cover, the ring knife is sleeved in the sleeve ring, an upper cover is arranged on the top of the sleeve ring, and a water outlet is arranged on the upper cover, the lower cover and the upper cover can be tightly buckled on the sleeve ring, and permeable stones are arranged above the lower cover and below the upper cover, and when the lower cover and the upper cover are buckled on the sleeve ring, two permeable stones are respectively located at the upper and lower ends of the clay to be tested in the ring knife.

[0009] The principle and effect of the above technical solution are as follows:

[0010] Place the clay on the cardboard, cut the clay with a cutter, fill the clay into the cutter, place a filter paper on the lower surface of the clay, place a permeable stone on the lower surface of the filter paper, push the permeable stone by hand, push the clay between the two incisions in the middle of the cutter, reserve gaps above and below the incision, select a 0.03mm-1mm tangent line to pass through the tops of the two incisions, and cut the clay to form a single crack with a width of 0.03mm-1mm, place a filter paper on the upper surface of the clay, place a permeable stone on the upper surface of the filter paper, insert the bottom of the cutter into the second slot of the lower cover, the permeable stone at the bottom just contacts the lower cover, cover the upper cover, the top of the cutter just inserts into the first slot of the upper cover, the permeable stone at the top just contacts the upper cover, rotate the tightening nut, push the tightening nut down against the upper cover, fix the entire penetration container, and complete the subsequent different single crack penetration measurement experiments in clay. The invention solves the problem that the existing experimental device cannot measure the permeability coefficient of single cracks of different widths in clay.

[0011] Preferably, the tangent line is a steel wire.

[0012] Preferably, the diameter of the tangent cross section is 0.03 mm-1 mm.

[0013] Preferably, a bracket is fixedly installed at the bottom of the lower cover, the end of the bracket passes through the lower cover and is installed on the upper cover, and a tightening nut is provided at the upper end of the bracket. When the lower cover and the upper cover are buckled on the ring, the tightening nut can push the upper cover downward to fix the entire permeation container.

[0014] Preferably, a second annular groove is provided on the upper surface of the lower cover located on the inner side of the sleeve ring, and a first annular groove symmetrical to the second annular groove is provided on the bottom of the upper cover, and the top and bottom of the ring knife are respectively exactly inserted into the first annular groove and the second sliding groove.

[0015] A single crack permeability measuring device in clay comprising the permeability container comprises a water supply bottle, a variable water head pipe and a permeability container placed at decreasing heights, the water supply bottle is provided with a water source connecting pipe connected to a water source, the output end of the water supply bottle is respectively connected to the variable water head pipe and the permeability container, the variable water head pipe is connected to the water inlet on the lower cover, and the variable water head pipe is provided with a scale for measuring the water level height.

[0016] Preferably, the pipeline in the measuring device is a hose, and the hose is provided with a plurality of water pipe clamps for stopping water.

[0017] Beneficial effects of the present disclosure:

[0018] The utility model provides a single crack permeability measuring device in clay, which solves the problem that the existing experimental device cannot measure the permeability coefficient of single cracks with different widths in clay. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of the utility model of a single crack permeability measuring device in clay;

[0020] Figure 2 This is a connection diagram of the sleeve ring and the ring cutter of the utility model;

[0021] Figure 3 This is the structure diagram of the ring cutter of the utility model;

[0022] Figure 4 This is a tangent structure diagram of the utility model;

[0023] Figure 5 This is the upper surface structure diagram of the lower cover plate of the utility model;

[0024] Figure 6 This is a structural diagram of the lower surface of the upper cover plate of the utility model.

[0025] Among them, 110, bracket; 120, upper cover; 121, first ring groove; 130, lower cover; 131, second ring groove; 140, collar; 150, water outlet; 160, water inlet; 170, exhaust port; 180, ring knife; 181, incision; 190, permeable stone; 310, variable head pipe; 320, water pipe clamp; 400, water supply bottle; 410, water source pipe; 500, tangent. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Example

[0028] According to the concept of this application, Figures 1 to 6 An embodiment of a device for measuring the permeability of a single crack in clay that is easy to operate is described. Specifically, the device for measuring the permeability of a single crack in clay is constructed as a split structure, which has multiple components such as a ring cutter 180, a tangent line 500 and a lower cover 130. The device for measuring the permeability of a single crack in clay can be used to measure the permeability coefficient of a single crack of different widths in clay.

[0029] Please refer to Figures 1 to 6 , a permeation container, comprising:

[0030] A ring knife 180, the side of which is provided with two symmetrically distributed cutouts 181;

[0031] A tangent line 500 having a cross-sectional diameter that is smaller than the width of the cutout 181; and

[0032] The lower cover 130 has a water outlet 150 and an exhaust port 170 at the bottom thereof, a sleeve ring 140 for placing a ring cutter 180 is provided on the upper surface of the lower cover 130, the ring cutter 180 is sleeved in the sleeve ring 140, an upper cover 120 is provided on the top of the sleeve ring 140, a water outlet 150 is provided on the upper cover 120, the lower cover 130 and the upper cover 120 can be tightly buckled on the sleeve ring 140, permeable stones 190 are provided above the lower cover 130 and below the upper cover 120, and when the lower cover 130 and the upper cover 120 are buckled on the sleeve ring 140, the two permeable stones 190 are respectively located at the upper and lower ends of the clay to be tested in the ring cutter 180.

[0033] Place the clay on the cardboard, cut the clay with a cutter, fill the clay into the cutter, place a filter paper on the lower surface of the clay, place a permeable stone 190 on the lower surface of the filter paper, push the permeable stone 190 by hand, push the clay to between the two cuts 181 in the middle of the cutter, reserve gaps above and below the cuts 181, select a 0.03mm-1mm cut line 500 to pass through the top of the two cuts 181, and cut the clay to form a single crack with a width of 0.03mm-1mm, and place a filter paper on the upper surface of the clay. A filter paper is placed on the upper surface of the filter paper, a permeable stone 190 is placed, the bottom of the cutter is inserted into the second slot of the lower cover 130, the permeable stone 190 at the bottom just contacts the lower cover 130, the upper cover 120 is covered, the top of the cutter is just inserted into the first slot of the upper cover 120, the permeable stone 190 at the top just contacts the upper cover 120, and the entire permeability container is fixed by rotating the tightening nut and pushing the tightening nut downward against the upper cover 120, thereby completing the subsequent single crack permeability measurement experiments in clay. Further, the tangent line 500 uses a steel wire.

[0034] Furthermore, the cross-sectional diameter of the tangent line 500 is 0.03 mm to 1 mm.

[0035] Furthermore, a bracket 110 is fixedly installed at the bottom of the lower cover 130, and an end of the bracket 110 passes through the lower cover 130 and is installed on the upper cover 120. A tightening nut is provided at the upper end of the bracket 110. When the lower cover 130 and the upper cover 120 are buckled on the ring 140, the tightening nut can push the upper cover 120 downward to fix the entire permeation container.

[0036] Furthermore, a second annular groove 131 is formed on the upper surface of the lower cover 130 located on the inner side of the sleeve ring 140, and a first annular groove 121 symmetrical to the second annular groove 131 is formed on the bottom of the upper cover 120. The top and bottom of the ring knife 180 are respectively inserted into the first annular groove 121 and the second slide groove.

[0037] A single crack permeability measuring device in clay comprising the above-mentioned permeability container comprises a water supply bottle 400, a variable water head pipe 310 and a permeability container placed at decreasing heights in sequence, the water supply bottle 400 is provided with a water source connecting pipe 410 connected to a water source, the output end of the water supply bottle 400 is respectively connected to the variable water head pipe 310 and the permeability container, the variable water head pipe 310 is connected to the water inlet 160 on the lower cover 130, and the variable water head pipe 310 is provided with a scale for measuring the water level height.

[0038] Furthermore, the pipeline in the measuring device is a hose, and a plurality of water pipe clamps 320 for stopping water are provided on the hose.

[0039] When in use, different single cracks are set on the clay according to experimental requirements, and then the single crack permeability measuring device in the entire clay is connected, and the permeability coefficient of the single crack in the clay is measured through the existing variable head permeability experimental steps.

[0040] The scheme of describing the drawings in sequence is carried out simply based on the examples in the drawings and according to the distribution method of the claims.

[0041] A single crack permeability measuring device in clay including a permeability container includes a water supply bottle 400, a variable water head pipe 310 and a permeability container placed at decreasing heights, the water supply bottle 400 is provided with a water source connecting pipe 410 connected to a water source, the output end of the water supply bottle 400 is respectively connected to the variable water head pipe 310 and the permeability container, the variable water head pipe 310 is connected to the water inlet 160 on the lower cover 130, and the variable water head pipe 310 is provided with a scale for measuring the water level height. The pipeline in the measuring device is a hose, and the hose is provided with a plurality of water pipe clamps 320 for stopping water.

[0042] A permeation container, comprising:

[0043] A ring knife 180, the side of which is provided with two symmetrically distributed cutouts 181;

[0044] The tangent line 500 has a cross-sectional diameter smaller than the width of the incision 181; the tangent line 500 is made of a steel wire, and the cross-sectional diameter of the tangent line 500 is 0.03 mm to 1 mm.

[0045] The lower cover 130 has a water outlet 150 and an exhaust port 170 at the bottom thereof, a sleeve ring 140 for placing a ring cutter 180 is provided on the upper surface of the lower cover 130, the ring cutter 180 is sleeved in the sleeve ring 140, an upper cover 120 is provided on the top of the sleeve ring 140, a water outlet 150 is provided on the upper cover 120, the lower cover 130 and the upper cover 120 can be tightly buckled on the sleeve ring 140, permeable stones 190 are provided above the lower cover 130 and below the upper cover 120, and when the lower cover 130 and the upper cover 120 are buckled on the sleeve ring 140, the two permeable stones 190 are respectively located at the upper and lower ends of the clay to be tested in the ring cutter 180. A bracket 110 is fixedly installed at the bottom of the lower cover 130, and the end of the bracket 110 passes through the lower cover 130 and is installed on the upper cover 120. A tightening nut is arranged on the upper end of the bracket 110. When the lower cover 130 and the upper cover 120 are buckled on the ring 140, the tightening nut can push the upper cover 120 downward to fix the entire permeation container; a second annular groove 131 is provided on the upper surface of the lower cover 130 located on the inner side of the ring 140, and a first annular groove 121 symmetrical to the second annular groove 131 is provided at the bottom of the upper cover 120, and the top and bottom of the ring knife 180 are just stuck in the first annular groove 121 and the second sliding groove respectively.

[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A device for measuring the permeability of a single crack in clay, comprising a permeability container, characterized in that: The permeation container comprises: A ring knife (180), wherein the side surface of the ring knife (180) is provided with two symmetrically distributed cutouts (181); A tangent line (500), wherein the diameter of the cross section of the tangent line (500) is smaller than the width of the incision (181); and A lower cover (130) is provided at the bottom of the lower cover (130) with a water outlet (150) and an exhaust port (170); a collar (140) is provided on the upper surface of the lower cover (130) for placing the ring knife (180); the ring knife (180) is sleeved in the collar (140); an upper cover (120) is provided on the top of the collar (140); the upper cover (120) is provided with a water outlet (150); the lower cover (130) and the upper cover (120) can be tightly buckled on the collar (140); permeable stones (190) are provided above the lower cover (130) and below the upper cover (120); when the lower cover (130) and the upper cover (120) are buckled on the collar (140), two permeable stones (190) are respectively located at the upper and lower ends of the clay to be tested in the ring knife (180).

2. A device for measuring the permeability of a single crack in clay according to claim 1, characterized in that: The tangent line (500) is made of steel wire.

3. A device for measuring the permeability of a single crack in clay according to claim 2, characterized in that: The cross-sectional diameter of the tangent line (500) is 0.03 mm to 1 mm.

4. A device for measuring the permeability of a single crack in clay according to claim 3, characterized in that: A bracket (110) is fixedly mounted on the bottom of the lower cover (130); an end of the bracket (110) passes through the lower cover (130) and is mounted on the upper cover (120); a tightening nut is provided on the upper end of the bracket (110); when the lower cover (130) and the upper cover (120) are buckled onto the collar (140), the tightening nut can push the upper cover (120) downwards, thereby fixing the entire permeation container.

5. A device for measuring the permeability of a single crack in clay according to claim 4, characterized in that: A second annular groove (131) is formed on the upper surface of the lower cover (130) located inside the sleeve ring (140), and a first annular groove (121) symmetrical to the second annular groove (131) is formed on the bottom of the upper cover (120), and the top and bottom of the ring knife (180) are respectively exactly inserted into the first annular groove (121) and the second sliding groove.

6. A device for measuring the permeability of a single crack in clay according to claim 5, characterized in that: The measuring device comprises a water supply bottle (400), a variable water head tube (310) and a permeation container which are placed at decreasing heights in sequence; the water supply bottle (400) is provided with a water source connection tube (410) connected to a water source; the output end of the water supply bottle (400) is respectively connected to the variable water head tube (310) and the permeation container; the variable water head tube (310) is connected to a water inlet (160) on the lower cover (130); and the variable water head tube (310) is provided with a scale for measuring the water level height.

7. A device for measuring the permeability of a single crack in clay according to claim 6, characterized in that: The pipeline in the measuring device is a hose, and the hose is provided with a plurality of water pipe clamps (320) for stopping water.