Structural surface shear test device and structural surface shear test system

Abstract

The present application provides a structural surface shear test device and a structural surface shear test system, which belong to the field of portable geotechnical on-site rapid test equipment. The structural surface shear test device includes a structural surface locking structure, an upper shear box and a lower shear box. The upper shear box is used to embed a first clamping box, and the lower shear box is used to embed a second clamping box. During the shear test, the lower shear box always remains stationary, and the upper shear box undergoes shear failure under the external force of the horizontal hydraulic device and the vertical hydraulic device. Among them, the structural surface locking structure includes a first clamping box, a second clamping box and a locking assembly. The structural surface shear test device adopts a concept different from the standard specimen made by concrete pouring and curing. Compared with the concrete pouring method, it can shorten the specimen preparation time, thereby shortening the shear test cycle.

Description

Technical Field

[0001] The present application relates to the field of geotechnical testing equipment, and in particular, to a structural surface shear testing device and a structural surface shear testing system. Background Art

[0002] The structural surface is the weak surface of rock's shear resistance. The shear strength of the structural surface is generally very low, and external disturbances can easily cause rock damage along the structural surface.

[0003] At present, on-site sampling generally selects fresh rocks with structural surfaces, and then cuts them to form a sample that meets the test size requirements. In related technologies, concrete is usually used to cast rocks in a shear box to form a standard specimen. After the concrete is cured, a shear test is performed along the structural surface. However, the time required for concrete curing is relatively long, which results in a long test cycle for the shear specimen. Summary of the invention

[0004] In view of this, the embodiments of the present application provide a structural surface shear test device and a structural surface shear test system, aiming to shorten the test cycle of the shear specimen.

[0005] In a first aspect, the present application provides a structural surface shear test device, comprising:

[0006] A structural surface locking structure, the structural surface locking structure comprising

[0007] A first clamping box, wherein the first clamping box has a first accommodating space; a second clamping box, wherein the second clamping box has a second accommodating space, and a reserved gap is provided between the first clamping box and the second clamping box; a locking assembly, wherein the locking assembly comprises a first clamping member, a second clamping member, and a positioning member, wherein the first clamping member has a first accommodating groove, and the second clamping member has a second accommodating groove, the first clamping member is locked in the first accommodating space, and the second clamping member is locked in the second accommodating space, and the positioning member comprises a first positioning portion and a second positioning portion detachably connected to the first positioning portion, wherein the first positioning portion and the second positioning portion form a positioning groove, and the first accommodating groove, the second accommodating groove, and the positioning groove are configured to accommodate a shear specimen;

[0008] An upper shear box, the upper shear box having a first installation cavity for the first clamping box to enter, the upper shear box having a horizontal force-bearing end and a vertical force-bearing end, the horizontal force-bearing end being configured to drive the first clamping box to move in a horizontal direction under the drive of a horizontal force, and the vertical force-bearing end being configured to drive the first clamping box to move in a vertical direction under the drive of a vertical force; and

[0009] A lower shear box is provided with a second installation cavity for the second clamping box to enter, and the lower shear box and the upper shear box are spaced apart.

[0010] In combination with the first aspect, in a first possible implementation manner of the first aspect, the first clamping box includes two detachably connected first limiting members, and the first accommodating space is formed between the two first limiting members.

[0011] In combination with the first possible implementation of the first aspect, in a second possible implementation of the first aspect, the first clamping box also includes a first connecting member and a first nut, the first limiting member is provided with two rows of first mounting holes, and first threaded ends are provided at both ends of the first connecting member. The first threaded ends are accommodated in the first mounting holes and are threadedly connected to the first nut to limit the movement of the first clamping member.

[0012] In combination with the first possible implementation of the first aspect, in a third possible implementation of the first aspect, the second clamping box includes two detachably connected second limiting members, the second accommodating space is formed between the two second limiting members, and the second limiting member and the first limiting member are spaced apart to form the reserved gap.

[0013] In combination with the third possible implementation of the first aspect, in a fourth possible implementation of the first aspect, the second clamping box also includes a second connecting member and a second nut, the second limiting member is provided with two rows of second mounting holes, and second threaded ends are provided at both ends of the second connecting member and the second threaded ends are accommodated in the second mounting holes and are threadedly connected to the second nut to limit the movement of the second clamping member.

[0014] In combination with the first aspect, in a fifth possible implementation manner of the first aspect, the first clamping member includes a first clamping portion and a first wing portion, and the first clamping portion and the first wing portion are detachably connected.

[0015] In combination with the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, the first clamping member further includes a first matching block, which can be detachably connected to the first wing, and the first matching block is configured to abut against the surface of the shear specimen.

[0016] In combination with the sixth possible implementation of the first aspect, in a seventh possible implementation of the first aspect, a communicating first groove is formed in the first matching block and the first wing portion, and the first clamping member further includes a first abutting portion, which can be embedded in the first groove and abut against the surface of the shear specimen.

[0017] In combination with the seventh possible implementation manner of the first aspect, in an eighth possible implementation manner of the first aspect, the second clamping member includes a second clamping portion and a second wing portion, and the second clamping portion and the second wing portion are detachably connected.

[0018] In combination with the eighth possible implementation manner of the first aspect, in a ninth possible implementation manner of the first aspect, the second clamping member further includes a second matching block, the second matching block can be detachably connected to the second wing, and the second matching block is configured to abut against the surface of the shear specimen.

[0019] In combination with the ninth possible implementation manner of the first aspect, in a tenth possible implementation manner of the first aspect, the second matching block and the second wing portion are provided with a communicating second groove, and the second clamping member further includes a second abutting portion, which can be embedded in the second groove and abut against the surface of the shear specimen.

[0020] In combination with the tenth possible implementation manner of the first aspect, in an eleventh possible implementation manner of the first aspect, the second wing portion and the first wing portion are arranged opposite to each other along the axial direction of the shear specimen.

[0021] In combination with the eleventh possible implementation manner of the first aspect, in the twelfth possible implementation manner of the first aspect, the first clamping box and the second clamping box are provided with sliding grooves which are arranged opposite to each other, and the structural surface shear test device also includes a sliding part which can slide along the sliding grooves.

[0022] In a second aspect, the present application provides a structural surface shear test system, comprising

[0023] A structural surface locking structure, the structural surface locking structure comprising

[0024] A first clamping box, wherein the first clamping box has a first accommodating space; a second clamping box, wherein the second clamping box has a second accommodating space, and a reserved gap is provided between the first clamping box and the second clamping box; a locking assembly, wherein the locking assembly comprises a first clamping member, a second clamping member, and a positioning member, wherein the first clamping member has a first accommodating groove, and the second clamping member has a second accommodating groove, the first clamping member is locked in the first accommodating space, and the second clamping member is locked in the second accommodating space, and the positioning member comprises a first positioning portion and a second positioning portion detachably connected to the first positioning portion, wherein the first positioning portion and the second positioning portion form a positioning groove, and the first accommodating groove, the second accommodating groove, and the positioning groove are configured to accommodate a shear specimen;

[0025] An upper shear box, wherein the upper shear box has a first installation cavity for the first clamping box to enter, and the upper shear box has a horizontal force-bearing end and a vertical force-bearing end, wherein the horizontal force-bearing end is configured to drive the first clamping box to move in a horizontal direction under the drive of a horizontal force, and the vertical force-bearing end is configured to drive the first clamping box to move in a vertical direction under the drive of a vertical force;

[0026] A lower shear box, wherein the lower shear box has a second installation cavity for the second clamping box to enter, and the lower shear box and the upper shear box are spaced apart;

[0027] A base, the base is connected to the lower shear box, the base is provided with a first guide rail and a second guide rail, the first guide rail and the second guide rail are arranged on opposite sides of the base;

[0028] A sliding mechanism, the sliding mechanism comprising a first support column, a second support column arranged opposite to the first support column, a first sliding rod, a second sliding rod arranged opposite to the first sliding rod, a first connecting plate and a second connecting plate arranged opposite to the first connecting plate, the first support column is slidably connected to the first guide rail, the second support column is slidably connected to the second guide rail, the first sliding rod can be movably passed through the first support column and the two ends of the first sliding rod are respectively connected to the first connecting plate and the second connecting plate, the second sliding rod can be movably passed through the second support column and the two ends of the second sliding rod are respectively connected to the first connecting plate and the second connecting plate;

[0029] A stand, the stand being connected to the base;

[0030] a horizontal hydraulic device, the horizontal hydraulic device being mounted on the first connecting plate and being used for abutting against the horizontal force-bearing end to apply a horizontal force to the horizontal force-bearing end; and

[0031] A vertical hydraulic device is installed on the vertical frame and is used to abut against the vertical force-bearing end to apply a vertical force to the vertical force-bearing end.

[0032] In combination with the second aspect, in a first possible implementation manner of the second aspect, the base is provided with a limiting groove, and the stand is rotatably installed in the limiting groove.

[0033] In combination with the first possible implementation manner of the second aspect, in two possible implementation manners of the second aspect, a maximum angle formed between the stand and the limiting groove is 90°.

[0034] In combination with the second possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, both the horizontal hydraulic device and the vertical hydraulic device are hydraulic jacks.

[0035] In combination with the third possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, the first clamping box includes two detachably connected first limiting members, and the first accommodating space is formed between the two first limiting members.

[0036] In combination with the fourth possible implementation of the second aspect, in a fifth possible implementation of the second aspect, the first clamping box also includes a first connecting member and a first nut, the first limiting member is provided with two rows of first mounting holes, and first threaded ends are provided at both ends of the first connecting member. The first threaded ends are accommodated in the first mounting holes and are threadedly connected to the first nut to limit the movement of the first clamping member.

[0037] In combination with the fifth possible implementation of the second aspect, in a sixth possible implementation of the second aspect, the second clamping box includes two detachably connected second limiting members, the second accommodating space is formed between the two second limiting members, and the second limiting member and the first limiting member are spaced apart to form the reserved gap.

[0038] In combination with the sixth possible implementation of the second aspect, in a seventh possible implementation of the second aspect, the second clamping box also includes a second connecting member and a second nut, the second limiting member is provided with two rows of second mounting holes, and second threaded ends are provided at both ends of the second connecting member and the second threaded ends are accommodated in the second mounting holes and are threadedly connected to the second nut to limit the movement of the second clamping member.

[0039] In combination with the seventh possible implementation manner of the second aspect, in an eighth possible implementation manner of the second aspect, the first clamping member includes a first clamping portion and a first wing portion, and the first clamping portion and the first wing portion are detachably connected.

[0040] In combination with the eighth possible implementation manner of the second aspect, in a ninth possible implementation manner of the second aspect, the first clamping member further includes a first matching block, which can be detachably connected to the first wing portion, and the first matching block is configured to abut against the surface of the shear specimen.

[0041] In combination with the ninth possible implementation manner of the second aspect, in a tenth possible implementation manner of the second aspect, a communicating first groove is formed between the first matching block and the first wing portion, and the first clamping member further includes a first abutting portion, which can be embedded in the first groove and abut against the surface of the shear specimen.

[0042] In combination with the tenth possible implementation manner of the second aspect, in an eleventh possible implementation manner of the second aspect, the second clamping member includes a second clamping portion and a second wing portion, and the second clamping portion and the second wing portion are detachably connected.

[0043] In combination with the eleventh possible implementation manner of the second aspect, in a twelfth possible implementation manner of the second aspect, the second clamping member further includes a second matching block, the second matching block can be detachably connected to the second wing, and the second matching block is configured to abut against the surface of the shear specimen.

[0044] In combination with the twelfth possible implementation manner of the second aspect, in a thirteenth possible implementation manner of the second aspect, the second matching block and the second wing portion are provided with a connected second groove, and the second clamping member further includes a second abutting portion, which can be embedded in the second groove and abut against the surface of the shear specimen.

[0045] In combination with the thirteenth possible implementation manner of the second aspect, in a fourteenth possible implementation manner of the second aspect, the second wing portion and the first wing portion are arranged opposite to each other along the axial direction of the shear specimen.

[0046] In combination with the second aspect, in a fifteenth possible implementation of the second aspect, the first clamping box and the second clamping box are provided with sliding grooves which are arranged opposite to each other, and the structural surface locking structure further includes a sliding portion which can slide along the sliding grooves.

[0047] The beneficial effects of the present application are embodied in that the structural surface shear test device includes a structural surface locking structure, an upper shear box and a lower shear box. Among them, the structural surface locking structure includes a first clamping box, a second clamping box and a locking assembly. The upper shear box is used to embed the first clamping box, and the lower shear box is used to embed the second clamping box. During the shear test, the lower shear box always remains stationary, and the upper shear box is sheared and damaged under the external force of the horizontal hydraulic device and the vertical hydraulic device. The locking assembly includes a first clamping member, a second clamping member and a positioning member. When in use, the first section of the sample and the second section of the sample are connected and fixed by the positioning member, and then the first section of the sample is fixed by the first clamping member, and the second section of the sample is fixed by the second clamping member. After the shear sample is fixed, the first clamping member and the second clamping member are respectively fixed by the first clamping box and the second clamping box to limit their movement. The structural surface locking structure adopts a concept different from the standard specimen made by concrete pouring and curing. Compared with the concrete pouring method, it can shorten the specimen preparation time, thereby shortening the shear test cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the drawings required for use in the implementation methods will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0049] Figure 1 It is a schematic structural diagram of a structural surface shear test device provided in an embodiment of the present application;

[0050] Figure 2 It is a schematic diagram of the internal structure of the structural surface locking structure provided in an embodiment of the present application;

[0051] Figure 3 It is a structural schematic diagram of a structural surface locking structure provided in an embodiment of the present application;

[0052] Figure 4 yes Figure 3 A schematic structural diagram of the first clamping box in FIG.

[0053] Figure 5 yes Figure 3 A schematic structural diagram of the second clamping box in FIG.

[0054] Figure 6 is a schematic diagram of the structure of a locking assembly provided in an embodiment of the present application;

[0055] Figure 7 It is a schematic diagram of the internal structure of the structural surface locking structure provided in an embodiment of the present application;

[0056] Figure 8 is a schematic diagram of structural surface shear specimens with different inclination angles provided in an embodiment of the present application;

[0057] Fig. 9 is a schematic structural diagram of an upper shear box provided in an embodiment of the present application;

[0058] Fig.10 is a schematic structural diagram of a lower shear box provided in an embodiment of the present application;

[0059] Fig.11 is a structural schematic diagram of a structural surface shear test system provided in an embodiment of the present application from a first perspective;

[0060] Fig.12 is a structural schematic diagram of a second viewing angle of a structural surface shear test system provided in an embodiment of the present application;

[0061] Fig.13 It is a schematic diagram of the connection between the base and the stand provided in an embodiment of the present application.

[0062] Icons: 10-structural surface shear test device; 20-structural surface shear test system; 30-horizontal hydraulic device; 40-vertical hydraulic device; 100-structural surface locking structure; 110-first clamping box; 111-first accommodating space; 113-first limiting member; 1131-first mounting hole; 115-first connecting member; 117-first nut; 130-second clamping box; 131-second accommodating space; 133-second limiting member; 1331-second mounting hole; 135-second connecting member; 137-second nut; 150-locking assembly; 151-first clamping member; 1511-first clamping portion; 1513-first wing portion; 1515-first matching block; 1517-first abutting portion; 153-second clamping member; 1531-second clamping portion; 15 33-second wing; 1535-second matching block; 1537-second abutting portion; 155-positioning member; 1551-first positioning portion; 1553-second positioning portion; 300-upper shear box; 310-first mounting cavity; 330-horizontal force-bearing end; 331-first force-bearing column; 333-avoidance portion; 350-vertical force-bearing end; 351-second force-bearing column; 353-force-bearing frame; 355-movable block; 500-lower shear box; 510-second mounting cavity; 200-base; 210-first guide rail; 230-second guide rail; 250-limiting groove; 400-sliding mechanism; 410-first supporting column; 420-second supporting column; 430-first sliding rod; 440-second sliding rod; 450-first connecting plate; 460-second connecting plate; 600-stand. DETAILED DESCRIPTION

[0063] In order to make the purpose, technical solutions and advantages of the implementation methods of this application clearer, the technical solutions in the implementation methods of this application will be clearly and completely described below in conjunction with the drawings in the implementation methods of this application. Obviously, the described implementation methods are part of the implementation methods of this application, not all of the implementation methods. Based on the implementation methods in this application, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0064] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0065] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0066] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0067] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0068] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements; it can be an electrical connection, or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0069] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0070] In the related technology, concrete is usually used to cast rock samples in a shear box to form a standard specimen, and after the concrete is cured, a shear test is performed along the structural surface. However, the concrete curing time is relatively long (at least 1-2 days), which results in a long shear test cycle.

[0071] In addition, concrete pouring also has the following disadvantages:

[0072] 1. During the pouring process, tricalcium silicate in cement reacts with water, that is, the hydration reaction of concrete during the pouring process, resulting in temperature rise. In addition, concrete needs to be configured according to a certain water-cement ratio. Changes in temperature and moisture content have an adverse effect on the measured shear parameters of the structural surface, resulting in poor measurement accuracy and low reliability.

[0073] 2. During the concrete pouring process, the structural surface is in a completely exposed state. During the operation, the structural surface is easily adhered to by concrete. Once adhered to by concrete, the specimen needs to be replaced. Therefore, the operation is cumbersome and the success rate of specimen production is low.

[0074] To this end, the present application provides a structural surface locking structure for conducting rock structural surface shear tests, aiming to solve one or more of the above-mentioned technical problems.

[0075] The structural surface locking structure is used to fix the shear sample, which can be a standard size sample, such as a core obtained by drilling, and the obtained core is used as a shear sample. The shear sample can also be of other sizes, such as a shear sample formed by cutting rock. When selecting or preparing the shear sample, the disturbance to the structural surface should be minimized. The following is an explanation with reference to the accompanying drawings.

[0076] Figure 1 The figure shows a schematic diagram of a structural surface shear test device. Figure 1 The structural surface shear test device 10 includes a structural surface locking structure 100 ( Figure 1 ), an upper shear box 300 and a lower shear box 500.

[0077] Figure 2 An internal structure diagram of a structural surface locking structure is illustrated. Figure 3 The structural diagram of the structural surface locking structure is shown. Figure 2 and Figure 3 The structural surface locking structure 100 includes a first clamping box 110 , a second clamping box 130 and a locking assembly 150 .

[0078] Figure 4 Schematic diagram of the structure of the first clamping box is shown. Figure 4 The first clamping box 110 has a first accommodating space 111 .

[0079] In some specific embodiments, the first clamping box 110 includes two detachably connected first stoppers 113, and a first accommodation space 111 is formed between the two first stoppers 113. In a specific configuration, the first stopper 113 can be a rectangular steel plate, and the two rectangular steel plates are relatively arranged to form the first accommodation space 111.

[0080] The two rectangular steel plates are detachably connected. For example, the first clamping box 110 also includes a first connector 115 and a first nut 117, the first limiter 113 is provided with two rows of first mounting holes 1131, and both ends of the first connector 115 are provided with first threaded ends, and the first threaded ends are accommodated in the first mounting holes 1131 and are threadedly connected to the first nut 117. In this embodiment, the two first limiters 113 are connected together by the cooperation of the first connector 115 and the first nut 117. In other embodiments, one end of the first connector 115 can also be fixedly connected to one of the first limiters 113 (for example, by welding), and the other end of the first connector 115 is threadedly connected to the first nut 117 to connect the first connector 115 to the other first limiter 113.

[0081] In some other specific implementations, each row of first mounting holes 1131 is provided with 6 holes. When clamping and locking the assembly 150, appropriate first mounting holes 1131 can be selected to connect the two first stoppers 113 according to the length and inclination angle of the shear specimen, wherein the inclination angle is related to the inclination angle of the structural surface. For example, when the length of the shear specimen is long, two rows of first mounting holes 1131 close to the outside can be selected, and when the length of the shear specimen is short, two rows of first mounting holes 1131 close to the inside can be selected. Of course, the specific installation position of the shear specimen needs to be determined in combination with the inclination angle of the structural surface.

[0082] Figure 5 Schematic diagram of the structure of the second clamping box is shown. Figure 5 The second clamping box 130 has a second accommodating space 131 .

[0083] In some specific embodiments, the second clamping box 130 includes two detachably connected second stoppers 133, and a second accommodation space 131 is formed between the two second stoppers 133. For example, the second stopper 133 is a rectangular steel plate, and the two rectangular steel plates are arranged opposite to each other to form the second accommodation space 131.

[0084] The two rectangular steel plates are detachably connected. For example, the second clamping box 130 also includes a second connecting member 135 and a second nut 137, the second limiting member 133 is provided with two rows of second mounting holes 1331, and the second connecting member 135 is provided with second threaded ends at both ends, and the second threaded ends are accommodated in the second mounting holes 1331 and are threadedly connected to the second nut 137. In this embodiment, the two second limiting members 133 are connected together by the cooperation of the second connecting member 135 and the second nut 137. In other embodiments, one end of the second connecting member 135 can also be fixedly connected to one of the second limiting members 133 (for example, by welding), and the other end of the second connecting member 135 is threadedly connected to the second nut 137 to connect the second connecting member 135 to the other second limiting member 133.

[0085] In some other specific implementations, each row of second mounting holes 1331 is provided with 6, and when clamping the locking assembly 150, a suitable second mounting hole 1331 can be selected according to the length and inclination angle of the shear specimen to connect the two second stoppers 133. The structures of the second clamping box 130 and the first clamping box 110 and the technical effects produced are basically the same, and are not described in detail here.

[0086] Here, it should be noted that the first clamping box 110 and the second clamping box 130 are arranged vertically spaced apart, that is, there is a gap between the first clamping box 110 and the second clamping box 130 to form a reserved gap.

[0087] In the present application, the first clamping box 110 and the second clamping box 130 function to clamp and limit the sliding of the locking assembly 150 , that is, the friction between the first clamping box 110 and the second clamping box 130 and the locking assembly 150 is used to limit the sliding of the locking assembly 150 .

[0088] Figure 6 A schematic diagram of the structure of a locking assembly is shown. Figure 6 The locking assembly 150 includes a first clamping member 151 , a second clamping member 153 and a positioning member 155 .

[0089] The first clamping member 151 has a first receiving groove, the second clamping member 153 has a second receiving groove, the first clamping member 151 is locked in the first receiving space 111, and the second clamping member 153 is locked in the second receiving space 131. As mentioned above, the two detachably connected first limiting members 113 limit the first clamping member 151 in the first receiving space 111, and there is no relative displacement between the first limiting member 113 and the first clamping member 151. The two detachably connected second limiting members 133 limit the second clamping member 153 in the second receiving space 131, and there is no relative displacement between the second limiting member 133 and the second clamping member 153.

[0090] In a specific configuration, the first clamping member 151 includes a first clamping portion 1511 and a first wing portion 1513, and the first clamping portion 1511 and the first wing portion 1513 are detachably connected. For example, the first wing portion 1513 and the first clamping portion 1511 are connected by screws, or the first wing portion 1513 and the first clamping portion 1511 can be snap-connected. When the first clamping portion 1511 and the first wing portion 1513 are in a connected state, the first clamping portion 1511 and the first wing portion 1513 form a first receiving groove.

[0091] In the present application, the second clamping member 153 includes a second clamping portion 1531 and a second wing portion 1533, and the second clamping portion 1531 and the second wing portion 1533 are detachably connected. The structures and technical effects of the second clamping member 153 and the first clamping member 151 are basically the same, and are not described here for the sake of simplicity.

[0092] The positioning member 155 includes a first positioning portion 1551 and a second positioning portion 1553 detachably connected to the first positioning portion 1551. The first positioning portion 1551 and the second positioning portion 1553 form a positioning groove. The first receiving groove, the second receiving groove and the positioning groove are configured to receive the shear specimen. In a specific configuration, the first positioning portion 1551 and the second positioning portion 1553 can be connected by screws. In addition, the positioning member 155 needs to be removed before the shear test. Please refer to Figure 7 The function of the positioning member 155 is to pre-fix the shear specimens with the structural surface together, and then fix them at both ends of the shear specimens. The technical effect of pre-fixing the shear specimens together is that it can prevent the shear specimens from moving along the structural surface during the installation and fixation of the shear specimens, resulting in changes in the roughness of the structural surface, thereby causing inaccurate test results.

[0093] In order to facilitate understanding of the technical solution of the present application, the applicant briefly describes the structural surface shear test herein.

[0094] Since the shear specimen has a structural surface, the shear specimen is equivalent to being divided into two parts along the structural surface (hereinafter referred to as the first section specimen and the second section specimen). Figure 8 , Figure 8 Schematic diagram showing structural surface shear specimens with different inclination angles.

[0095] Before the shear test, the first section of the sample and the second section of the sample are connected by using the positioning member 155, that is, the shear sample near the structural surface is wrapped by the positioning member 155, and the first section of the sample and the second section of the sample are connected as a whole, so that the first section of the sample and the second section of the sample will not be misaligned relative to each other.

[0096] The first section of the sample is fixed in the first clamping member 151, and the second section of the sample is fixed in the second clamping member 153. When fixing, the position of the structural surface should be adjusted to the reserved gap between the first clamping box 110 and the second clamping box 130, and the plane where the structural surface is located should be parallel to the horizontal plane.

[0097] The first clamping member 151 and the second clamping member 153 are clamped respectively by the first clamping box 110 and the second clamping box 130 , and then the positioning member 155 is removed.

[0098] Here, the applicant believes that it is necessary to explain the timing of removing the positioning member 155. The positioning member 155 can be removed in any of the following steps:

[0099] 1. Before the first clamping member 151 and the second clamping member 153 are clamped by the first clamping box 110 and the second clamping box 130:

[0100] After the first section of the sample is accommodated in the first accommodating groove, the second section of the sample is accommodated in the second accommodating groove, and the positions and angles of the first clamping member and the second clamping member are determined, the sample can be removed.

[0101] 2. After the first clamping member 151 and the second clamping member 153 are locked: remove the positioning member 155 through the reserved gap. For example, use a screwdriver to remove the screws connecting the first positioning portion 1551 and the second positioning portion 1553 to separate the first positioning portion 1551 and the second positioning portion 1553 from the shear specimen.

[0102] It should be noted that, if conditions permit, the positioning member 155 should be removed after all installation work is completed, so as to have less impact on the shear specimen.

[0103] As mentioned above, the lengths of shear specimens vary, and the first clamping member 151 of a fixed length is not suitable for shear specimens of various lengths. To this end, in a specific embodiment, the first clamping member 151 further includes a first matching block 1515, which can be detachably connected to the first wing 1513, and the first matching block 1515 is configured to abut against the surface of the shear specimen.

[0104] In the present application, the first matching block 1515 is detachably connected to the first wing 1513, which is equivalent to extending the length of the first wing 1513, so that the first wing 1513 can support the shear specimen over a larger area, which can better avoid the influence of the deformation of the shear specimen when it is subjected to force during the shear test on the test results, and can improve the accuracy of the test results. For example, when the length of the shear specimen is long, and the length of the shear specimen that can be wrapped by the first clamping portion 1511 and the first wing 1513 is short, during the test, the shear specimen will not be sheared along the development direction of the structural surface, but will be offset from the structural surface at a small angle, resulting in low test accuracy and even unreliable test results. By increasing the number of reasonable first matching blocks 1515, the shear specimen can be sheared along the development direction of the structural surface.

[0105] Similarly, the second clamping member 153 may also include a second block 1535, which can be detachably connected to the second wing 1533, and the second block 1535 is configured to abut against the surface of the shear specimen. The second block 1535 has substantially the same structure and technical effects as the first block 1515, and will not be described in detail for the sake of brevity.

[0106] In the specific setting, the second wing 1533 and the first wing 1513 are arranged relative to each other along the axial direction of the shear specimen. At this time, the second block 1535 and the first block 1515 are also arranged relative to each other along the axial direction of the shear specimen, for example, the first block 1515 is arranged on the upper surface of the first section of the specimen, and the second block 1535 is arranged on the lower surface of the second section of the specimen. During the test, the first section of the specimen is supported by the first block 1515, and the second section of the specimen is also supported by the second block 1535, thereby limiting the movement trajectory of the first section of the specimen and the second section of the specimen under the action of external force, so that shear failure will occur along the direction of the structural surface even if the shear specimen is long.

[0107] In some other specific embodiments, a communicating first groove is formed between the first wing 1513 and the first matching block 1515. The first clamping member 151 further includes a first abutting portion 1517, which can be embedded in the first groove and abut against the surface of the shear specimen.

[0108] In a specific configuration, the positioning member 155 is also provided with a first groove, and the first abutting portion 1517 can also be embedded in the first groove of the positioning member 155 .

[0109] In the present application, the first abutting portion 1517 and the first matching block 1515 both have the function of limiting the shear failure of the shear specimen to the structural surface. The first abutting portion 1517 also has the following advantages over the first matching block 1515:

[0110] 1. Compared with the first matching block 1515 , the first abutting portion 1517 occupies a smaller space, is more suitable for the narrow first accommodation space 111 , and has a more compact structure.

[0111] 2. One end of the first abutting portion 1517 can be embedded in the positioning member 155, so that the positioning member 155 and the first clamping member 151 form a whole, which can more stably and accurately fix the first section of the sample and improve the accuracy of the test results.

[0112] It should be noted that the first abutting portion 1517 cannot cross the structural surface of the shear specimen (for ease of demonstration, Figure 5 , the first abutting portion 1517 is across the structural surface of the shear test), otherwise the shear failure of the shear specimen is disturbed by the first abutting portion 1517, resulting in test failure.

[0113] In some other specific embodiments, the second wing 1533 and the second matching block 1535 are provided with a second groove in communication. The second clamping member 153 also includes a second abutting portion 1537, which can be embedded in the second groove and abut against the surface of the shear specimen. In the present application, the second abutting portion 1537 has substantially the same structure and technical effects as the first abutting portion 1517, and will not be described in detail for the sake of simplicity.

[0114] The second wing 1533 and the second matching block 1535 define a second groove in communication. The second clamping member 153 further includes a second abutting portion 1537 . The second abutting portion 1537 can be embedded in the second groove and abut against the surface of the shear specimen.

[0115] In a specific configuration, the positioning member 155 is also provided with a second groove, and the second abutting portion 1537 can also be embedded in the first groove of the positioning member 155 .

[0116] In the present application, the reason why a reserved gap can be formed between the first clamping box 110 and the second clamping box 130 is that the shear specimen can provide support for the first clamping box 110 so that the first clamping box 110 is suspended above the second clamping box 130 .

[0117] In order to prevent the first clamping box 110 from damaging the structural surface due to its own weight during installation, the first clamping box 110 and the second clamping box 130 are provided with sliding grooves arranged opposite to each other, and the structural surface locking structure 100 also includes a sliding part (not shown in the figure), which can slide along the sliding groove. During installation, the first clamping box 110 is supported by the sliding part, and when performing a shear test, the sliding part is slid along the sliding groove so that the sliding part is separated from the first clamping box 110 and the second clamping box 130. In the specific setting, the sliding part can be a steel ball, which is a rigid material that is not easily deformed and can provide a good supporting effect.

[0118] In a specific setting, the shear specimen may be a rock core, which is in the shape of a long column with a regular shape and a uniform diameter, and is easy to install for a shear test.

[0119] Fig. 9 A schematic diagram of the structure of an upper shear box is shown. Fig. 9 The upper shear box 300 has a first installation cavity 310 for the first clamping box 110 to enter, and has a horizontal force-bearing end 330 and a vertical force-bearing end 350. The horizontal force-bearing end 330 is configured to drive the first clamping box 110 to move in the horizontal direction under the drive of the horizontal force, and the vertical force-bearing end 350 is configured to drive the first clamping box 110 to move in the vertical direction under the drive of the vertical force. For example, in Figure 7In the embodiment, the horizontal force-bearing end 330 is arranged on the left side of the upper shear box 300, and the vertical force-bearing end 350 is arranged on the top of the upper shear box 300. In the present application, both the horizontal force-bearing end 330 and the vertical force-bearing end 350 are used to transmit the force.

[0120] In a specific setting, the horizontal force-bearing end 330 includes a first force-bearing column 331 and an avoidance portion 333. One side of the avoidance portion 333 is connected to the upper shear box 300 (for example, by welding), and the other side of the avoidance portion 333 is connected to the first force-bearing column 331. When the upper shear box 300 is subjected to a horizontal force, the avoidance portion 333 can move a preset distance in the horizontal direction and can avoid the lower shear box 500. In other words, the avoidance portion 333 can move a preset distance in the horizontal direction and will not cause the horizontal force-bearing end 330 to conflict with the lower shear box 500. In a specific setting, the preset distance is generally 2 to 5 centimeters. For example, in Figure 7 In the figure, the avoidance portion 333 is an L-shaped steel block.

[0121] In a specific configuration, the vertical force-bearing end 350 includes a second force-bearing column 351 and a force-bearing frame 353. The force-bearing frame 353 abuts against the first clamping box 110, that is, the force-bearing frame 353 can transmit the vertical force to the first clamping box 110. For example, the force-bearing frame 353 includes an I-shaped steel, and the I-shaped steel abuts against the edge of the first stopper 113 for vertical force transmission.

[0122] It should be noted that, for those skilled in the art, the specific structures of the horizontal force-bearing end 330 and the vertical force-bearing end 350 can be designed as needed.

[0123] The inventors discovered that during the installation of the shear specimen, the first limit member 113 and the second limit member 133 were not strictly aligned, resulting in the first clamping box 110 and the second clamping box 130 not being strictly aligned. The first clamping box 110 must be embedded in the upper shear box 300, and the second clamping box 130 must also be embedded in the lower shear box 500. Therefore, in each shear test, the upper shear box 300 and the lower shear box 500 may have different offset distances in the horizontal direction. For example, in the first shear test, the boundaries of the upper shear box 300 and the lower shear box 500 were just aligned. In the second shear test, the upper shear box 300 was offset to the right relative to the first shear test. This situation requires that the position of the device that applies the vertical force needs to be constantly adjusted in order to better contact the vertical force-bearing end.

[0124] To this end, the inventors set a movable block 355 between the second force-bearing column 351 and the force-bearing frame 353, and the movable block 355 can slide along the force-bearing frame 353 and support the second force-bearing column 351. In this way, the second force-bearing column 351 can have better contact with the device applying the vertical force by moving the movable block 355.

[0125] Fig.10 A schematic diagram of the structure of a lower shear box is shown. Fig.10 The lower shear box 500 has a second installation cavity 510 for the second clamping box 130 to enter, and the lower shear box 500 and the upper shear box 300 are arranged at intervals. It can be understood that the specific size of the second installation cavity 510 needs to be determined according to the size of the second clamping box 130, and when the second clamping box 130 enters the second installation cavity 510, its top is basically flush with the lower shear box.

[0126] Fig.11 The schematic diagram of the structure of the structural surface shear test system from the first perspective is shown. Fig.12 A schematic diagram showing the structure of the second perspective of the structural surface shear test system. Fig.11 and Fig.12 The present application further provides a structural surface shear test system 20 , including a structural surface shear test device 10 , a base 200 , a sliding mechanism 400 , a stand 600 , a horizontal hydraulic device 30 , and a vertical hydraulic device 40 .

[0127] The specific structure of the structural surface shear test device 10 has been mentioned in the above content, so it will not be repeated here.

[0128] In some specific embodiments, the base 200 is connected to the lower shear box 500, and the base 200 is provided with a first guide rail 210 and a second guide rail 230, and the first guide rail 210 and the second guide rail 230 are arranged on opposite sides of the base 200. For example, the base 200 can be a rectangular steel block, a diamond steel block or a circular steel block. The base 200 can be fixed to the indoor floor or anchored to the operating platform. Of course, the structural surface shear test device 10 can also be carried outdoors for on-site shear tests. For example, when the core is taken out from the borehole, the shear test can be carried out to avoid the wear of the structural surface during long-distance transportation.

[0129] The sliding mechanism 400 includes a first support column 410 , a second support column 420 disposed opposite to the first support column 410 , a first sliding rod 430 , a second sliding rod 440 disposed opposite to the first sliding rod 430 , a first connecting plate 450 , and a second connecting plate 460 disposed opposite to the first connecting plate 450 .

[0130] In the specific setting, the first sliding rod 430 can be movably passed through the first support column 410 and the two ends of the first sliding rod 430 are respectively connected to the first connecting plate 450 and the second connecting plate 460, and the second sliding rod 440 can be movably passed through the second support column 420 and the two ends of the second sliding rod 440 are respectively connected to the first connecting plate 450 and the second connecting plate 460.

[0131] The first support column 410 is slidably connected to the first guide rail 210 , and the second support column 420 is slidably connected to the second guide rail 230 .

[0132] In the present application, the first support column 410 and the second support column 420 are used to support the first connecting plate 450 and the second connecting plate 460, and the first support column 410 and the second support column 420 can adjust their positions by sliding. In the specific configuration, two first support columns 410 and two second support columns 420 are provided.

[0133] The stand 600 is connected to the base 200. In a specific configuration, the stand 600 can be integrally formed with the base 200, or the stand 600 can be welded or threadedly connected to the base 200.

[0134] In a specific configuration, the horizontal hydraulic device 30 is mounted on the first connecting plate 450 and is used to abut against the horizontal force-bearing end 330 to apply a horizontal force to the horizontal force-bearing end 330. In a specific configuration, the horizontal hydraulic device 30 may be a hydraulic jack, such as a horizontal loading double-acting cylinder. The horizontal hydraulic device 30 may be detachably connected to the first connecting plate 450, for example, the horizontal hydraulic device 30 is connected to the first connecting plate 450 by bolts. The horizontal hydraulic device 30 may also be welded to the first connecting plate 450.

[0135] When a horizontal force is applied to the shear specimen, the second connecting plate 460 is brought into contact with the lower shear box 500 by moving the first slide bar 430 and the second slide bar 440. Then the horizontal hydraulic device 30 is adjusted to make the horizontal hydraulic device 30 contact with the horizontal force-bearing end 330. When in use, a horizontal load sensor can be installed on the horizontal force-bearing end 330. When the force on the horizontal load sensor changes, recording can be started.

[0136] In a specific configuration, the vertical hydraulic device 40 is mounted on the stand 600 and is used to abut against the vertical force-bearing end 350 to apply a vertical force to the vertical force-bearing end 350. In a specific configuration, the vertical hydraulic device 40 may be a hydraulic jack, such as an axially loaded double-acting cylinder. The vertical hydraulic device 40 may be detachably connected to the stand 600, for example, the vertical hydraulic device 40 is connected to the stand 600 by bolts. The vertical hydraulic device 40 may also be welded to the stand 600.

[0137] Fig.13 A schematic diagram showing the connection between the base and the stand is shown. Fig.13In some other specific embodiments, the base 200 is provided with a limiting groove 250, and the stand 600 is rotatably installed in the limiting groove 250. In the specific setting, the maximum angle formed between the stand 600 and the limiting groove 250 is 90°. In this embodiment, the angle between the stand 600 and the limiting groove 250 can be adjusted in the range of 0~90°. When it is at the maximum angle of 90°, the vertical force can be applied. When the upper shear box 300 needs to be removed, the stand 600 can be put down, for example, the stand 600 is rotated so that the stand 600 is placed in the limiting groove 250. Since the position of the stand 600 is changed at this time, the upper shear box 300 can be easily removed. It can be understood that the upper shear box 300 can also be easily installed. Therefore, since the stand 600 is rotatably connected to the base 200, it is convenient to disassemble and install the equipment.

[0138] In the present application, the structural surface shear test device 10 includes a structural surface locking structure 100, an upper shear box 300 and a lower shear box 500. Among them, the structural surface locking structure 100 includes a first clamping box 110, a second clamping box 130 and a locking assembly 150. The upper shear box 300 is used to embed the first clamping box 110, and the lower shear box 500 is used to embed the second clamping box 130. During the shear test, the lower shear box 500 always remains stationary, and the upper shear box 300 is sheared and damaged under the external force of the horizontal hydraulic device 30 and the vertical hydraulic device 40. The locking assembly 150 includes a first clamping member 151, a second clamping member 153 and a positioning member 155. When in use, the first section of the sample and the second section of the sample are connected and fixed by the positioning member 155, and then the first section of the sample is fixed by the first clamping member 151, and the second section of the sample is fixed by the second clamping member 153. After the shear specimen is fixed, the first clamping box 110 and the second clamping box 130 are used to respectively fix the first clamping member 151 and the second clamping member 153 to restrict their movement. The structural surface locking structure 100 adopts a concept different from the standard specimen made by concrete pouring and curing. Compared with the concrete pouring method, it can shorten the specimen preparation time, thereby shortening the shear test cycle and facilitating on-site testing.

[0139] In addition, the coordinated use of the first clamping box 110, the second clamping box 130 and the locking assembly 150 can clamp structural surface shear specimens with different inclination angles, so that the structural surface shear test system 20 can be suitable for structural surface shear specimens with different inclination angles.

[0140] The above are only preferred implementations of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A structural surface shear test device, characterized in that: include A structural surface locking structure, the structural surface locking structure comprising A first clamping box, wherein the first clamping box has a first accommodating space; A second clamping box, wherein the second clamping box has a second accommodating space, and a reserved gap is provided between the first clamping box and the second clamping box; A locking assembly, wherein the locking assembly comprises a first clamping member, a second clamping member and a positioning member, wherein the first clamping member has a first accommodating groove, the second clamping member has a second accommodating groove, the first clamping member is locked in the first accommodating space, the second clamping member is locked in the second accommodating space, the positioning member comprises a first positioning portion and a second positioning portion detachably connected to the first positioning portion, the first positioning portion and the second positioning portion form a positioning groove, the first accommodating groove, the second accommodating groove and the positioning groove are configured to accommodate a shear specimen, the positioning member needs to be removed before a shear test is performed, before the shear test is performed, the first section specimen and the second section specimen are connected by using the positioning member, the shear specimen near the structural surface is wrapped by the positioning member, the first section specimen and the second section specimen are connected as a whole, so that the first section specimen and the second section specimen are not relatively misaligned; An upper shear box, wherein the upper shear box has a first installation cavity for the first clamping box to enter, and the upper shear box has a horizontal force-bearing end and a vertical force-bearing end, wherein the horizontal force-bearing end is configured to drive the first clamping box to move in a horizontal direction under the drive of a horizontal force, and the vertical force-bearing end is configured to drive the first clamping box to move in a vertical direction under the drive of a vertical force; as well as A lower shear box, wherein the lower shear box has a second installation cavity for the second clamping box to enter, and the lower shear box and the upper shear box are spaced apart; The first clamping member includes a first clamping portion and a first wing portion, the first clamping portion and the first wing portion are detachably connected, the first clamping member also includes a first matching block, the first matching block can be detachably connected to the first wing portion, the first matching block is configured to abut against the surface of the shear specimen, and when the first clamping portion and the first wing portion are in a connected state, the first clamping portion and the first wing portion form a first accommodating groove.

2. The structural surface shear test device according to claim 1, characterized in that: The first clamping box includes two detachably connected first limiting members, and the first accommodating space is formed between the two first limiting members.

3. The structural surface shear test device according to claim 2, characterized in that: The first clamping box also includes a first connecting member and a first nut. The first limiting member is provided with two rows of first mounting holes. Both ends of the first connecting member are provided with first threaded ends, and the first threaded ends are accommodated in the first mounting holes and are threadedly connected to the first nut to limit the movement of the first clamping member.

4. The structural surface shear test device according to claim 2, characterized in that: The second clamping box includes two detachably connected second limiting members, the second accommodating space is formed between the two second limiting members, and the second limiting member and the first limiting member are spaced apart to form the reserved gap.

5. The structural surface shear test device according to claim 4, characterized in that: The second clamping box also includes a second connecting member and a second nut. The second limiting member is provided with two rows of second mounting holes. Second threaded ends are provided at both ends of the second connecting member. The second threaded ends are accommodated in the second mounting holes and are threadedly connected to the second nut to limit the movement of the second clamping member.

6. The structural surface shear test device according to claim 1, characterized in that: The first matching block and the first wing portion are provided with a first groove in communication, and the first clamping member further comprises a first abutting portion, which can be embedded in the first groove and abut against the surface of the shear specimen.

7. The structural surface shear test device according to claim 6, characterized in that: The second clamping member includes a second clamping portion and a second wing portion, and the second clamping portion and the second wing portion are detachably connected.

8. The structural surface shear test device according to claim 7, characterized in that: The second clamping member further includes a second block, the second block being detachably connectable to the second wing, the second block being configured to abut against a surface of the shear specimen.

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