An adaptive continuous shear-seepage coupling test device for weak interlayers in rock mass

Abstract

The present invention provides an adaptive rock mass weak interlayer continuous shear-seepage coupling test device, including: an upper shear box; a lower shear box; two water injection components, each of which includes a transverse slot, a transverse piston, a vertical slide rail, a transverse baffle, a vertical baffle and a water pipe, the vertical baffle is connected to the transverse baffle, the transverse piston is connected to the vertical slide rail, one of the transverse baffle and the transverse slot of each water injection component is connected to the water seal of the upper plate of the sample, and the other is connected to the water seal of the lower plate of the sample, so that the water storage chamber completely covers the weak interlayer area located in the middle of the sample; and a lateral water sealing component, which is a combined sealing system of latex tape, transverse rubber head and adjusting bolt, used to block the two water injection components and the two sides of the sample. The beneficial effects of the present invention: while maintaining uniform water pressure in the water storage chamber of the water injection component, dynamic adjustment and coordinated deformation in the tangential and normal directions can be performed along the shear process of the weak interlayer sample, so as to achieve effective water sealing during the continuous shearing process of the sample.

Description

Technical Field

[0001] The invention relates to the technical field of rock mechanics test equipment, and in particular to an adaptive rock mass soft interlayer continuous shear-seepage coupling test device. Background Art

[0002] Under the influence of geological structure, physical and chemical weathering and human engineering activities, there are a large number of weak interlayers or structural planes with different development degrees in the rock mass. Compared with the intact rock blocks, the weak interlayers in the rock mass have lower strength and higher permeability, which largely determine the shear mechanical properties and seepage characteristics of the rock mass. The shear-seepage coupling characteristics of weak interlayers in rock mass under complex environments have become an important basic scientific issue in the field of rock mass engineering such as dam construction, slope management, and tunnel construction. Conducting shear-seepage coupling tests on weak interlayers in rock mass is the most direct and effective way to study this issue.

[0003] Effective water sealing in the shear-seepage coupling test of weak interlayers in rock has always been a technical problem that has troubled the academic community. The main reason is that the shear process of weak interlayers is accompanied by tangential deformation and normal deformation, which makes the traditional rigid water sealing mechanism fail. In view of this, scholars have developed a variety of test devices based on different water sealing methods, which can be generally divided into the following two categories: 1) Flexible tubular body wrapped water sealing. This water sealing method is common in tests based on rock triaxial testing machines, and the idea of ​​confining pressure greater than water pressure is mainly used to seal water. However, this method requires the specimen to be placed in a triaxial chamber, and the mechanical property analysis is relatively difficult, and it is difficult to ensure that the test process is carried out in an ideal state. 2) Mechanical loading water sealing. This water sealing method is common in tests based on shear test systems. Existing devices often cannot track and adjust with the shear process, so shear and seepage can only be carried out alternately, and a continuous shear-seepage coupling process cannot be achieved. Although some scholars have also proposed a method of correcting the sealing pressure by servo control in recent years, this method obviously requires high sensitivity of the monitoring and control system, which increases the complexity of the device and the difficulty of the test. Summary of the invention

[0004] In view of this, in order to solve the problem of failure of the rigid water sealing mechanism under the tangential deformation and normal deformation of the weak interlayer in the current shear-seepage coupling test of the weak interlayer in rock mass, an embodiment of the present invention provides an adaptive continuous shear-seepage coupling test device for the weak interlayer in rock mass.

[0005] An embodiment of the present invention provides an adaptive rock mass weak interlayer continuous shear-seepage coupling test device, comprising:

[0006] An upper shear box, with upper and lower ends opened;

[0007] A lower shear box, which is arranged opposite to the upper shear box in vertical direction and has an upper end opening, so that the weak interlayer specimen can be accommodated in the upper shear box and the lower shear box;

[0008] Two water injection components, one of which is a water inlet component, and the other is a water outlet component arranged opposite to the water inlet component, each of which comprises a transverse slot, a transverse piston, a vertical slide rail, a transverse baffle, a vertical baffle and a water pipe, one end of the vertical baffle is connected to one end of the transverse baffle, the vertical slide rail is installed on the other end of the vertical baffle, the transverse piston is inserted into the transverse slot and the end is connected to the vertical slide rail, one of the transverse baffle and the transverse slot of each water injection component is connected to the lower port of the upper shear box to seal the upper plate of the weak interlayer specimen, and the other is connected to the upper port of the lower shear box to seal the lower plate of the weak interlayer specimen, and the upper shear box and the lower shear box can move vertically or laterally relative to each other;

[0009] And two lateral water-sealing components, each of which includes a latex tape, a transverse rubber head and an adjusting bolt, the latex tape seals the two water injection components and the two sides of the weak interlayer sample, the transverse rubber head is set on one side of the weak interlayer sample, and the adjusting bolt is connected to the transverse rubber head and can drive the transverse rubber head to press against the side of the weak interlayer sample.

[0010] Furthermore, the water injection component is formed into a U shape, and a water storage cavity is formed inside.

[0011] Furthermore, the water storage chambers of the two water injection components are aligned laterally.

[0012] Furthermore, a transverse baffle of the water injection component is connected to the lower port of the upper shear box, and a transverse slot is connected to the upper port of the lower shear box; a transverse slot of another water injection component is connected to the lower port of the upper shear box, and a transverse baffle is connected to the upper port of the lower shear box.

[0013] Furthermore, it also includes a plurality of vertical pads and fixed blocks, wherein some of the vertical pads and some of the fixed blocks are arranged at the lower port of the upper shear box and extend to the upper port of the lower shear box, and other vertical pads and other fixed blocks are arranged at the upper port of the lower shear box and extend to the lower port of the upper shear box.

[0014] Furthermore, the adjusting bolt passes through and is threadedly connected to the vertical pad.

[0015] Furthermore, each of the water injection components also includes two L-shaped lateral expansion adapters, which are connected to the lower port of the upper shear box or the upper port of the lower shear box, and are connected to the vertical pad or fixed block, and one side of the lateral expansion adapter is rigidly connected to one side of the water injection component and pressed against the weak interlayer specimen.

[0016] Furthermore, it also includes at least one tangential displacement sensor, and the tangential displacement sensor is arranged on the outer side of the lower shear box.

[0017] Furthermore, it also includes a normal displacement sensor, the upper shear box also includes an upper cover plate, the upper cover plate covers the upper port of the upper shear box, and the bottom surface of the upper cover plate is provided with a downwardly protruding bump, and the normal displacement sensor is arranged on the upper cover plate.

[0018] Furthermore, the cross section of the upper shear box and the cross section of the lower shear box are the same rectangle.

[0019] The beneficial effects brought about by the technical solution provided by the embodiment of the present invention are:

[0020] (1) The present invention is an adaptive rock soft interlayer continuous shear-seepage coupling test device, the water injection component adopts a connection structure combining a vertical slide rail and a rubber piston, which can maintain uniform water pressure in the water storage chamber while performing dynamic adjustments in the tangential and normal directions during the shearing process of the sample; the lateral water sealing component is a combined sealing system of a latex tape, a transverse rubber head and an adjusting bolt, which can coordinate deformation with the sample during the shearing process, thereby achieving effective water sealing during the continuous shearing process of the soft interlayer sample.

[0021] (2) The present invention is an adaptive rock soft interlayer continuous shear-seepage coupling test device, which places the soft interlayer sample as a whole in the upper shear box and the lower shear box, applies normal pressure on the upper cover plate through the normal pressure head and applies shear force on the outer side of the lower shear box through the shear pressure head. The mechanical action is clear, the shear process can be directly observed, and the test monitoring accuracy is effectively improved.

[0022] (3) The adaptive continuous shear-seepage coupling test device for weak interlayers in rock mass provided by the present invention has a simple structure, convenient operation, and strong adaptability, and can be used in conjunction with most conventional shear test systems to carry out shear-seepage coupling tests for weak interlayers in rock mass. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional structural schematic diagram of an adaptive rock mass weak interlayer continuous shear-seepage coupling test device of the present invention;

[0024] Figure 2It is a vertical main cross-sectional view of an adaptive rock mass weak interlayer continuous shear-seepage coupling test device of the present invention;

[0025] Figure 3 It is a side cross-sectional view of an adaptive rock mass weak interlayer continuous shear-seepage coupling test device of the present invention;

[0026] Figure 4 yes Figure 1 A schematic structural diagram of the middle water injection component 3;

[0027] Figure 5 It is a main cross-sectional view of the shear state of an adaptive rock mass weak interlayer continuous shear-seepage coupling test device of the present invention.

[0028] In the figure: 1-upper shear box, 2-lower shear box, 3-water injection component, 301-horizontal baffle, 302-vertical baffle, 303-vertical slide rail, 304-horizontal piston, 305-horizontal slot, 306-delivery pipe, 307-sealing sleeve, 308-water sealing cushion, 309-water storage chamber, 310-vent, 4-weak interlayer specimen, 5-vertical cushion block, 6-adjusting bolt, 7-horizontal expansion adapter, 8-fixing block, 9-side bracket, 10-upper cover plate, 11-bump, 12-normal pressure head, 13-tangential pressure head, 14-horizontal rubber head, 15-latex tape. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be further described below in conjunction with the accompanying drawings. The following is a preferred embodiment of the present invention, which is intended to provide a basic understanding of the present invention, but is not intended to confirm the key or decisive elements of the present invention or to limit the scope of protection.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Please refer to Figure 1 , 2 And 3, the embodiment of the present invention provides an adaptive rock mass weak interlayer continuous shear-seepage coupling test device, which mainly includes an upper shear box 1, a lower shear box 2, two water injection components 3, and two side water sealing components.

[0032] like Figure 1and 2 As shown, the upper shear box 1 is a rectangular groove with openings at both ends. The upper shear box 1 also includes an upper cover plate 10, which covers the upper port of the upper shear box 1, and the bottom surface of the upper cover plate 10 is provided with a downwardly protruding bump 11, and the cross-sectional shape of the bump 11 is the same as the cross-sectional shape of the upper shear box 1 to match. As described in this embodiment, the bump 11 is also set as a rectangular block, which can be just stuck into the upper port of the upper shear box 1, and then the normal force can be transmitted along the vertical direction.

[0033] Similarly, the lower shear box 2 is a rectangular groove with an open upper end and a closed lower end, and the lower port of the upper shear box 1 is arranged opposite to the upper port of the lower shear box 2. The weak interlayer sample 4 is accommodated in the upper shear box 1 and the lower shear box 2. The weak interlayer sample 4 in the figure includes a middle weak interlayer area (wavy area), an upper plate located above the weak interlayer area, and a lower plate located below the weak interlayer area. In this embodiment, the cross-section of the upper shear box 1 and the cross-section of the lower shear box 2 are the same rectangle, that is, the inner cavity cross-section of the upper shear box 1 and the lower shear box 2 is the same, and they are aligned up and down and separated.

[0034] Two water injection parts 3, one of which is a water inlet part and the other is a water outlet part arranged opposite to the water inlet part. Both water injection parts 3 are arranged between the upper shear box 1 and the lower shear box 2, and the water inlet part is located on one side of the upper port of the lower shear box 2, and the water outlet part is located on the other opposite side of the upper port of the lower shear box 2.

[0035] like Figure 4 As shown, each of the water injection components 3 includes a horizontal slot 305, a horizontal piston 304, a vertical slide rail 303, a horizontal baffle 301, a vertical baffle 302 and a water pipe 306, one end of the vertical baffle 302 is connected to one end of the horizontal baffle 301, the vertical slide rail 303 is installed on the other end of the vertical baffle 302, and the horizontal piston 304 is inserted into the horizontal slot 305 and the end is connected to the vertical slide rail 303.

[0036] As described in this embodiment, the upper and lower ends of the vertical baffle 302 are respectively vertically connected to the transverse piston 304 and the transverse baffle 301, and the transverse piston 304 and the transverse baffle 301 are located on the same side of the vertical baffle 302. The inner cavity of the transverse slot 305 is a rectangular piston cavity, and the inner cavity of the transverse slot 305 is also provided with an exhaust hole 310. The transverse piston 304 is plugged into the inner cavity of the transverse slot 305, so that the water injection component 3 is surrounded into a U shape, and a water storage cavity 309 is formed inside the water injection component 3. The vertical slide rail 303 is fixedly installed on the upper end of the vertical baffle 302, and a sealing sleeve 303 is also provided at the connection between the end of the transverse piston 304 and the vertical slide rail 303 to prevent water in the water storage cavity 309 from leaking.

[0037] The vertical baffle 302 is also provided with a water pipe 306, which penetrates the vertical baffle 302 and communicates with the inside of the water storage chamber 309. The water pipe 306 of the water inlet component is connected to a water pressure gauge and a servo plunger pump, which can provide uniform water pressure for the seepage test, and the water pipe 306 of the water outlet component is connected to a water pressure gauge and a flow meter, thereby realizing effective monitoring of the inlet and outlet water pressure and flow of the weak interlayer sample 4.

[0038] The two water injection components 3 are installed between the upper shear box 1 and the lower shear box 2, so that the water storage chamber 309 completely covers the weak interlayer area located in the middle of the weak interlayer sample 4. For each water injection component 3, one of its transverse baffle 301 and the transverse slot 305 is connected to the upper plate water seal of the weak interlayer sample 4, and the other is connected to the lower plate water seal of the weak interlayer sample 4. In this way, in the vertical direction, relying on the action of the vertical slide rail 303, the upper shear box 1 and the lower shear box 2 can move vertically relative to each other; in the horizontal direction, relying on the cooperation of the transverse piston 304 and the transverse slot 305, the upper shear box 1 and the lower shear box 2 can move horizontally relative to each other.

[0039] like Figure 1 As shown, a plurality of vertical pads 5 and fixed blocks 8 are further provided between the upper shear box 1 and the lower shear box 2, wherein some of the vertical pads 5 and some of the fixed blocks 8 are arranged at the lower port of the upper shear box 1 and extend to the upper port of the lower shear box 2, and other vertical pads 5 and other fixed blocks 8 are arranged at the upper port of the lower shear box 2 and extend to the lower port of the upper shear box 1. The vertical pads 5 and fixed blocks 8 are used to provide support force for each bolt, and the vertical pads 5 also bear the function of supporting the upper shear box 1.

[0040] Each of the water injection components 3 is mainly connected to the vertical pad 5 or the fixing block 8 at the lower port of the upper shear box 1 or the upper port of the lower shear box 2 by two L-shaped transverse expansion adapters 7. One side of the transverse expansion adapter 7 is in contact with one side of the water injection component 3 and is pressed against the weak interlayer specimen 4.

[0041] like Figure 1 and 2 As shown, the water injection component 3 located on the left side in this embodiment is a water outlet component, and its transverse baffle 301 is connected to the lower port of the upper shear box 1, specifically connected to the transverse expansion adapter 7, and the transverse expansion adapter 7 is connected to the vertical pad 5 at the lower port of the upper shear box 1 through fastening bolts, so as to seal the upper plate of the weak interlayer specimen 4 with water; its transverse slot 305 is connected to the upper port of the lower shear box 2, specifically connected to the transverse expansion adapter 7, and the transverse expansion adapter 7 is connected to the fixed block 8 at the upper port of the lower shear box 2 through fastening bolts, so as to seal the lower plate of the weak interlayer specimen 4 with water. Similarly, the other water injection component 3 located on the right side is a water inlet component, and its transverse baffle 301 is connected to the upper port of the lower shear box 2, specifically connected to the transverse expansion adapter 7, and the transverse expansion adapter 7 is connected to the vertical pad 5 at the upper port of the lower shear box 2 through fastening bolts to seal the lower plate of the weak interlayer specimen 4; its transverse slot 305 is connected to the lower port of the upper shear box 1, specifically connected to the transverse expansion adapter 7, and the transverse expansion adapter 7 is connected to the fixed block 8 at the lower port of the upper shear box 1 through fastening bolts to seal the lower plate of the weak interlayer specimen 4.

[0042] Preferably, the ends of the transverse slot 305 and the transverse baffle 301 are both provided with a water-sealing cushion layer 308, and the water-sealing cushion layer 308 is in extrusion contact with the side of the weak interlayer sample 4 to achieve end sealing of the transverse slot 305 and the transverse baffle 301 after installation.

[0043] The two lateral water sealing components are respectively arranged on the two sides adjacent to the vertical baffle 302. Each of the lateral water sealing components includes a latex tape 15, a transverse rubber head 14 and an adjusting bolt 6, the latex tape 15 blocks the two sides of the two water injection components 3, the transverse rubber head 14 is arranged on one side of the weak interlayer sample 4, and the adjusting bolt 6 is connected to the transverse rubber head 14 and can drive the transverse rubber head 14 to press against the side of the weak interlayer sample 4.

[0044] The latex tape 15 is used to seal the two sides of the water injection components 3 and the weak interlayer sample 4. Specifically, the latex tape 15 is bonded to the two sides of the water injection component 3 to seal the two sides of the weak interlayer sample 4 of the water injection component 3. The weak interlayer sample 4 is sealed with water on the side, and the transverse rubber head 14 is pressed against the surface of the latex tape 15, and the transverse rubber head 14 is applied with side pressure by adjusting the bolt 6 to seal the water, so that the space between the lower port of the upper shear box 1 and the upper port of the lower shear box 2 is closed to form a closed confining pressure cavity for accommodating the weak interlayer sample 4. The latex tape is elastic and can deform in coordination with the sample during the shearing process.

[0045] In addition, the above-mentioned adaptive rock soft interlayer continuous shear-seepage coupling test device also includes at least a tangential displacement sensor and a normal displacement sensor. Specifically, the tangential displacement sensor is arranged on the outside of the lower shear box 2. A side support 9 is provided on the outer surface of the lower shear box 2, and the tangential displacement sensor is installed on the side support 9 to detect the tangential displacement of the soft interlayer sample. The normal displacement sensor is arranged on the upper cover plate 10 to detect the normal displacement of the soft interlayer sample.

[0046] like Figure 2 and 5 As shown, the test method of the above-mentioned adaptive rock mass weak interlayer continuous shear-seepage coupling test device is:

[0047] Step 1: Prepare a cuboid weak interlayer specimen 4 by natural collection processing or Brazilian splitting method.

[0048] Step 2: Use latex tape 15 to preliminarily seal the two opposite sides of the weak interlayer sample 4, then place the weak interlayer sample 4 in the internal cavity of the upper shear box 1 and the lower shear box 2, press the transverse rubber head 14 against the surface of the latex tape 15, and apply lateral pressure to the transverse rubber head 14 by adjusting the bolt 6 to laterally seal the weak interlayer sample 4 with water.

[0049] Step 3: Install the water inlet component and the water outlet component between the upper shear box 1 and the lower shear box 2, so that the water inlet component and the water outlet component are installed on both sides of the weak interlayer sample 4 that are not sealed with the tape 15, so that the water storage cavity 309 of the water inlet component and the water outlet component is kept flush with the weak interlayer area in the middle of the weak interlayer sample 4 in the horizontal direction, and completely covers the weak interlayer area in the middle of the weak interlayer sample 4. Connect the ends of the transverse slot 305 and the transverse baffle 301 to the upper plate and lower plate water sealing of the weak interlayer sample 4, and connect the transverse expansion adapter 7 to the gasket 5 or the fixing block 8 of the lower port of the upper shear box 1 and the upper port of the lower shear box 2 by tightening bolts, and further pressurize and seal the contact surface between the weak interlayer sample 4 and the water injection component 3.

[0050] Step 4: Arrange a tangential displacement sensor on the outside of the lower shear box 2, and arrange a tangential displacement sensor on the upper cover plate 10 of the upper shear box 1, connect the water pipe 306 of the water inlet component with the servo plunger pump and the water pressure gauge, and connect the water pipe 306 of the water outlet component with the flow meter and another water pressure gauge.

[0051] Step 5: Use a conventional shear test system for mechanical loading. Specifically, apply normal pressure to the upper cover plate 10 to a target pressure value through the normal pressure head 12, and inject water into the water inlet component at a specified pressure through the servo plunger pump. When the water pressure remains stable, apply shear force to the lower shear box 2 at a specified shear rate through the shear pressure head 13.

[0052] Step 6: Collect the measurement data of the tangential displacement sensor, the directional displacement sensor, the two water pressure gauges and the flow meter, and record the test results in real time until the test is completed.

[0053] In this article, the directional words such as front, back, top, and bottom involved are defined by the positions of the parts in the drawings and the positions of the parts relative to each other, just for the sake of clarity and convenience in expressing the technical solution. It should be understood that they are relative concepts and can change accordingly according to different ways of use and placement, and the use of the directional words should not limit the scope of protection claimed in this application.

[0054] In the absence of conflict, the above embodiments and features in the embodiments may be combined with each other.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An adaptive rock mass soft interlayer continuous shear-seepage coupling test device, characterized in that: include: An upper shear box, with upper and lower ends opened; A lower shear box, which is arranged opposite to the upper shear box in vertical direction and has an upper end opening, so that the weak interlayer specimen can be accommodated in the upper shear box and the lower shear box; Two water injection components, one of which is a water inlet component and the other is a water outlet component arranged opposite to the water inlet component, each of which comprises a transverse slot, a transverse piston, a vertical slide rail, a transverse baffle, a vertical baffle and a water pipe, one end of the vertical baffle is connected to one end of the transverse baffle, the vertical slide rail is installed on the other end of the vertical baffle, the transverse piston is inserted into the transverse slot and the end is connected to the vertical slide rail, one of the transverse baffle and the transverse slot of each water injection component is connected to the lower port of the upper shear box to seal the upper plate of the weak interlayer specimen with water, and the other is connected to the upper port of the lower shear box to seal the lower plate of the weak interlayer specimen with water, and the upper shear box and the lower shear box can be moved vertically or laterally relative to each other; And two lateral water-sealing components, each of which includes a latex tape, a transverse rubber head and an adjusting bolt, the latex tape seals the two sides of the two water-injection components, the transverse rubber head is set on one side of the weak interlayer sample, and the adjusting bolt is connected to the transverse rubber head and can drive the transverse rubber head to press against the side of the weak interlayer sample.

2. The adaptive rock mass soft interlayer continuous shear-seepage coupling test device according to claim 1, characterized in that: The water injection component is surrounded in a U shape, and a water storage cavity is formed inside.

3. The adaptive rock mass soft interlayer continuous shear-seepage coupling test device according to claim 2, characterized in that: The water storage chambers of the two water injection components are aligned laterally.

4. The adaptive rock mass weak interlayer continuous shear-seepage coupling test device according to claim 1, characterized in that: A transverse baffle of one water injection component is connected to the lower port of the upper shear box, and a transverse slot is connected to the upper port of the lower shear box; a transverse slot of another water injection component is connected to the lower port of the upper shear box, and a transverse baffle is connected to the upper port of the lower shear box.

5. The adaptive rock mass soft interlayer continuous shear-seepage coupling test device according to claim 1, characterized in that: It also includes a plurality of vertical pads and fixed blocks, wherein some of the vertical pads and some of the fixed blocks are arranged at the lower port of the upper shear box and extend to the upper port of the lower shear box, and other vertical pads and other fixed blocks are arranged at the upper port of the lower shear box and extend to the lower port of the upper shear box.

6. The adaptive rock mass soft interlayer continuous shear-seepage coupling test device according to claim 5, characterized in that: The adjusting bolt passes through and is threadedly connected to the vertical pad.

7. The adaptive rock mass soft interlayer continuous shear-seepage coupling test device according to claim 5, characterized in that: Each of the water injection components also includes two L-shaped lateral expansion adapters, which are connected to the lower port of the upper shear box or the upper port of the lower shear box, and are connected to the vertical pad or fixed block. One side of the lateral expansion adapter is rigidly connected to one side of the water injection component and pressed against the weak interlayer specimen.

8. The adaptive rock mass weak interlayer continuous shear-seepage coupling test device according to claim 1, characterized in that: It also includes at least one tangential displacement sensor, which is arranged on the outer side of the lower shear box.

9. The adaptive rock mass weak interlayer continuous shear-seepage coupling test device according to claim 1, characterized in that: It also includes a normal displacement sensor. The upper shear box also includes an upper cover plate. The upper cover plate covers the upper port of the upper shear box, and a downwardly protruding block is provided on the bottom surface of the upper cover plate. The normal displacement sensor is arranged on the upper cover plate.

10. The self-adaptive rock mass weak interlayer continuous shear-seepage coupling test device according to claim 1, characterized in that: The cross section of the upper shear box and the cross section of the lower shear box are the same rectangle.

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