CN217738862U - Portable device for testing bonding strength of sprayed concrete - Google Patents

Abstract

The utility model provides a portable shotcrete bonds intensity testing arrangement, including fixing device, chute board, bore core device and bonding strength survey device, fixing device fixed mounting is on the rock face, chute board fixed mounting is in fixing device is last, it slides and sets up to bore the core device on the chute board, bonding strength survey device slides and sets up on the chute board. The utility model discloses simple structure, fixed convenient, convenient operation, safe and reliable can adapt to various site conditions, and detectable spray concrete and the cohering intensity between the rock body contact surface have the significance to improving detection accuracy and efficiency, reducing the detection cost, guaranteeing that spray concrete struts the quality, are fit for extensive popularization and application.

Description

Portable device for testing bonding strength of sprayed concrete

Technical Field

The utility model belongs to the technical field of engineering test technique and specifically relates to a portable injection concrete bonding strength testing arrangement is related to.

Background

A sprayed concrete support is widely applied to support or surface layer protection of projects such as tunnels, chambers, side slopes, foundation pits and the like, and more in domestic hydroelectric projects, for example, diversion tunnels, plants and dam shoulders of hydropower stations are provided with sprayed concrete supports. Meanwhile, the sprayed concrete is tightly bonded with the rock mass to form a common stress system integrating the surrounding rock and the support. The bonding strength between the sprayed concrete support and the rock surface is fully utilized, and the stability and the supporting capacity of the structure are improved. But at present, a testing device which can be suitable for various field conditions and can detect the bonding strength between sprayed concrete and a rock body contact surface does not exist.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a portable shotcrete intensity testing arrangement that coheres, detectable shotcrete and the rock mass contact surface between the intensity of cohering have the significance to improving detection accuracy and efficiency, reducing the detection cost, guaranteeing shotcrete and strut the quality.

According to the utility model discloses an aim, the utility model provides a portable shotcrete bonds intensity testing arrangement, including fixing device, chute board, brill core device and bonding strength survey device, fixing device fixed mounting is on the rock face, chute board fixed mounting is in fixing device is last, it slides and sets up to bore the core device on the chute board, bonding strength survey device slides and sets up on the chute board.

Further, the chute board includes chute board main part and two first spacing bolts, the chute board main part pass through the bolt install in fixing device is last, the symmetry is provided with trapezoidal spout in the chute board main part, be provided with the rectangle recess in the chute board main part, be provided with first through-hole in the chute board main part, the symmetry is provided with the viewing aperture in the chute board main part, bilateral symmetry is provided with first screw hole in the chute board main part, first spacing bolt passes through first screw hole spiro union is in the chute board main part, just first spacing bolt passes the chute board main part lateral wall stretches into in the trapezoidal spout.

Furthermore, the core drilling device comprises a first sliding support, a second sliding support, a drilling machine, a cutting drill bit, a lead screw and a locknut, wherein the first sliding support is arranged on the sliding chute plate main body in a sliding mode, the second sliding support is arranged on the first sliding support in a sliding mode, the drilling machine is fixedly arranged on the second sliding support, the drilling machine is communicated with an external power supply through a wire, the cutting drill bit is detachably arranged on the drilling machine, the lead screw is rotatably arranged on the second sliding support, the locknut is arranged at the bottom of the lead screw, and a handle is arranged at the tail of the lead screw.

Further, first sliding support includes first slide, guide arm, afterbody mounting panel and second spacing bolt, the guide arm symmetry sets up on the first slide, afterbody mounting panel fixed mounting be in the guide arm tail end, second spacing bolt pass first slide and with first slide threaded connection, second spacing bolt diameter with on the spout board main part rectangle recess width is the same, second spacing bolt position with the rectangle recess is corresponding.

Furthermore, a first trapezoidal sliding block and a third threaded hole are symmetrically arranged on the first sliding plate, the first trapezoidal sliding block is matched with the trapezoidal sliding groove, and the third threaded hole is matched with the first limiting bolt and the first threaded hole.

Further, the bonding strength measuring device comprises a third sliding support, an anchor rod drawing instrument and a clamp, wherein the third sliding support is arranged on the sliding groove plate main body in a sliding mode, the anchor rod drawing instrument is fixedly arranged on the third sliding support, the anchor rod drawing instrument is connected with an external pressurizing device through a pipeline, and the clamp is arranged at the tail of the anchor rod drawing instrument.

Further, the third sliding support includes third slide, bracing piece, first mounting panel, second mounting panel and third limit bolt, the bracing piece symmetry sets up on the third slide, first mounting panel fixed mounting is in the middle section of bracing piece leans on down, the second mounting panel is installed the afterbody of bracing piece, third limit bolt passes the third slide and with the third slide passes through threaded connection, third limit bolt diameter with in the chute board main part the rectangle recess width is the same, third limit bolt position with the rectangle recess is corresponding.

Furthermore, a second trapezoidal sliding block and a fourth threaded hole are symmetrically arranged on the third sliding plate, the second trapezoidal sliding block is matched with the trapezoidal sliding groove for use, and the fourth threaded hole is matched with the first limiting bolt and the first threaded hole for use.

Furthermore, fixing device includes bearing plate and inflation bolt group, inflation bolt group sets up in the bearing plate four corners, be provided with the round hole on the bearing plate.

Further, the expansion bolt group comprises an expansion bolt rod, a first adjusting nut and a second adjusting nut, the tail end of the expansion bolt rod penetrates through the bearing plate, and the first adjusting nut and the second adjusting nut are respectively arranged at two ends of the bearing plate.

The technical scheme of the utility model simple structure, fixed convenient, convenient operation, safe and reliable can adapt to various site conditions, and detectable spray concrete and the bonding strength between the rock body contact surface have the significance to improve detection accuracy and efficiency, reduce the detection cost, guarantee that spray concrete struts the quality, are fit for extensive popularization and application.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following descriptions are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a top view of an embodiment of the invention;

FIG. 3 isbase:Sub>A sectional view taken along line A-A of FIG. 2;

FIG. 4 is a sectional view taken along line B-B of FIG. 2;

fig. 5 is a schematic structural view of a fixing device according to an embodiment of the present invention;

FIG. 6 is a schematic structural view of a main body of a chute board according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a core drilling device according to an embodiment of the present invention;

fig. 8 is a schematic structural view of a first sliding bracket according to an embodiment of the present invention;

fig. 9 is a schematic structural view of a second sliding bracket according to an embodiment of the present invention;

FIG. 10 is a schematic structural view of a device for measuring adhesive strength according to an embodiment of the present invention;

fig. 11 is a schematic structural view of a third sliding bracket according to the embodiment of the present invention;

in the figure, 1-fixing device, 11-bearing plate, 111-round hole, 12-expansion bolt group, 121-expansion bolt rod, 122-first adjusting nut, 123-second adjusting nut, 2-chute plate, 21-chute plate body, 211-trapezoidal chute, 212-rectangular groove, 213-first threaded hole, 214-first through hole, 215-viewing port, 22-first limiting bolt, 3-core drilling device, 31-first sliding bracket, 311-first sliding plate, 3111-first trapezoidal slider, 3112-third threaded hole, 312-guide rod, 313-tail mounting plate, 3131-second threaded hole, second limiting bolt 314, 32-second sliding bracket, 33-drilling machine, 34-cutting drill bit, 35-lead screw, 36-locknut, 4-bonding strength measuring device, 41-third sliding bracket, 411-third sliding plate, 4111-second trapezoidal slider, 4112-fourth threaded hole, 412-supporting rod, 412-413-first mounting plate, 415-second mounting plate, 415-third mounting plate, 4111-second trapezoidal slider, 4112-fourth threaded hole, 412-supporting rod, 412-413, first mounting plate, 415-third bolt-drawing limiting bolt clamp, and clamp.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

As shown in figures 1-11 of the drawings,

the utility model provides a portable shotcrete bonds intensity testing arrangement, includes fixing device 1, chute board 2, bores core device 3 and bonding strength survey device 4, and fixing device 1 fixed mounting is on the rock face, and chute board 2 fixed mounting is on fixing device 1, and the core device 3 that bores slides and sets up on chute board 2, and bonding strength survey device 4 slides and sets up on chute board 2.

The chute board 2 comprises a chute board main body 21 and two first limit bolts 22, the chute board main body 21 is installed on the fixing device 1 through bolts, trapezoidal sliding grooves 211 are symmetrically formed in the chute board main body 21, rectangular grooves 212 are formed in the chute board main body 21, first through holes 214 are formed in the chute board main body 21, observation ports 215 are symmetrically formed in the chute board main body 21, first threaded holes 213 are symmetrically formed in the chute board main body 21 in two sides, the first limit bolts 22 are in threaded connection with the chute board main body 21 through the first threaded holes 213, and the first limit bolts 22 can penetrate through the side wall of the chute board main body 21 and extend into the trapezoidal sliding grooves 211.

The core drilling device 3 comprises a first sliding support 31, a second sliding support 32, a drilling machine 33, a cutting drill 34, a lead screw 35 and a locknut 36, wherein the first sliding support 31 is arranged on the sliding chute plate main body 21 in a sliding mode, the second sliding support 32 is arranged on the first sliding support 31 in a sliding mode, the drilling machine 33 is fixedly arranged on the second sliding support 32, the drilling machine 33 is communicated with an external power supply through a lead, the cutting drill 34 is detachably arranged on the drilling machine 33, the lead screw 35 is rotatably arranged on the second sliding support 32, the locknut 36 is arranged at the bottom of the lead screw 35, the locknut 36 prevents the lead screw 35 from being separated from the second sliding support 32 when rotating, the lead screw 35 penetrates through a tail mounting plate 313 of the first sliding support 31, the lead screw 35 is matched with a second threaded hole 3131 in the tail mounting plate 313, and the tail of the lead screw 35 is provided with a handle;

specifically, by rotating the handle at the tail of the lead screw 35, the lead screw 35 can move up and down under the matching of the lead screw 35 in the second threaded hole 3131, and the lead screw 35 can drive the second sliding support 32 to slide up and down on the first sliding support 31, so as to drive the drilling machine 33 and the cutting bit 34 which are installed on the second sliding support 32 to move up and down, thereby achieving the purpose of cutting the core;

the first sliding bracket 31 comprises a first sliding plate 311, a guide rod 312, a tail mounting plate 313 and a second limiting bolt 314, wherein the guide rod 312 is symmetrically arranged on the first sliding plate 311, the tail mounting plate 313 is fixedly mounted at the tail end of the guide rod 312, the second limiting bolt 314 passes through the first sliding plate 311 and is in threaded connection with the first sliding plate 311, the diameter of the second limiting bolt 314 is the same as the width of the rectangular groove 212 on the sliding groove plate main body 21, and the position of the second limiting bolt 314 corresponds to the rectangular groove 212;

specifically, when the first sliding support 31 needs to be fixed, the second limiting bolt 314 can be screwed, so that the second limiting bolt 314 is tightly attached to the bottom of the rectangular groove 212, the purpose of fixing the position of the first sliding support 31 is achieved, and meanwhile, the arrangement of the rectangular groove 212 can also prevent the second limiting bolt 314 from excessively rubbing the sliding chute plate main body 21 to influence the service life of the sliding chute plate main body 21;

the first sliding plate 311 is further symmetrically provided with a first trapezoidal sliding block 3111 and a third threaded hole 3112, the first trapezoidal sliding block 3111 is matched with the trapezoidal sliding groove 211 for use, and the third threaded hole 3112 is matched with the first limiting bolt 22 and the first threaded hole 213 for use;

specifically, the first limit bolt 22 is screwed on the chute board main body 21 through the first threaded hole 213, and the first limit bolt 22 can penetrate through the side wall of the chute board main body 21 and extend into the trapezoidal sliding groove 211, the first limit bolt 22 can be matched with the third threaded hole 3112 on the first sliding board 311 reaching the position after penetrating through the side wall of the chute board main body 21, the first limit bolt 22 can be screwed into the third threaded hole 3112, secondary limit can be performed on the first sliding board 311, and the drilling machine 33 and the cutting drill bit 34 are ensured to be more stable in operation.

The bonding strength measuring device 4 comprises a third sliding support 41, an anchor rod drawing instrument 42 and a clamp 43, wherein the third sliding support 41 is arranged on the sliding chute plate main body 21 in a sliding mode, the anchor rod drawing instrument 42 is fixedly arranged on the third sliding support 41, the anchor rod drawing instrument 42 is connected with an external pressurizing device through a pipeline, and the clamp 43 is arranged at the tail of the anchor rod drawing instrument 42;

the third sliding bracket 41 comprises a third sliding plate 411, a supporting rod 412, a first mounting plate 413, a second mounting plate 414 and a third limiting bolt 415, the supporting rod 412 is symmetrically arranged on the third sliding plate 411, the first mounting plate 413 is fixedly mounted at the middle section of the supporting rod 412 and is close to the lower part, the second mounting plate 414 is mounted at the tail part of the supporting rod 412, the third limiting bolt 415 passes through the third sliding plate 411 and is in threaded connection with the third sliding plate 411, the diameter of the third limiting bolt 415 is the same as the width of the rectangular groove 212 on the sliding channel plate main body 21, and the position of the third limiting bolt 415 corresponds to the rectangular groove 212;

the third sliding plate (411) is also symmetrically provided with a second trapezoidal sliding block 4111 matched with the trapezoidal sliding groove 211, and a fourth threaded hole 4112 matched with the first limiting bolt 22 and the first threaded hole 213;

specifically, the first limit bolt 22 is screwed on the chute board main body 21 through the first threaded hole 213, the first limit bolt 22 can penetrate through the side wall of the chute board main body 21 and extend into the trapezoidal chute 211, the first limit bolt 22 can be matched with the fourth threaded hole 4112 on the third sliding board 411 reaching the position after penetrating through the side wall of the chute board main body 21, the first limit bolt 22 can be screwed into the fourth threaded hole 3112, secondary limit can be performed on the third sliding board 411, and the anchor rod drawing instrument 42 is ensured to be more stable during working;

the fixing device 1 comprises a bearing plate 11 and expansion bolt groups 12, wherein the expansion bolt groups 12 are arranged at four corners of the bearing plate 11, and circular holes 111 are formed in the bearing plate 11;

the expansion bolt group 12 comprises an expansion bolt rod 121, a first adjusting nut 122 and a second adjusting nut 123, the tail end of the expansion bolt rod 121 penetrates through the pressure bearing plate 11, and the first adjusting nut 122 and the second adjusting nut 123 are respectively arranged at two ends of the pressure bearing plate 11;

specifically, the position of the pressure bearing plate 11 on the expansion bolt shaft 121, and thus the position of the entire apparatus, can be adjusted by rotationally adjusting the positions of the first and second adjustment nuts 122 and 123.

When the utility model is used, the position to be detected is selected, the electric hammer is used for drilling at the detection position, the drilling depth is generally 10cm and is smaller than the thickness of sprayed concrete, the electric hammer is used for installing the expansion bolt rod 121, then the whole device is installed on the expansion bolt rod 121, the height of the device is adjusted by rotationally adjusting the first adjusting nut 122 and the second adjusting nut 123, the bearing plate 11 is fixed when the device is adjusted to the required position, then the second limiting bolt 314 is unscrewed, so that the second limiting bolt 314 is separated from the bottom of the rectangular groove 212, at the moment, the drill core device 3 can slide on the sliding chute plate main body 21, the drill core device 3 is slid to the working position, the third threaded hole 3112 is observed to reach the position corresponding to the first threaded hole 213 through the observation port 215, the first limiting bolt 22 is screwed into the third threaded hole 3112, the second limiting bolt 314 is screwed, the second limit bolt 314 is tightly attached to the bottom of the rectangular groove 212, at this time, the core drilling device 3 is completely fixed, the power supply drilling machine of the drilling machine 33 is started to work, the screw 35 is rotated to push the cutting drill 34 to drill in a way of being perpendicular to the sprayed concrete layer, the drilling diameter phi is 100, the cutting drill penetrates into the surrounding rock by more than 20mm, a cylindrical body to be measured with a sprayed concrete and surrounding rock bonding surface is formed, when the drilling is carried out to the required depth, the screw 35 is reversely rotated to pull out the core drilling bit 34, then the second limit bolt 314 is unscrewed to separate the bottom of the rectangular groove 212, the first limit bolt 22 is screwed out from the third threaded hole 3112, the core drilling device 3 is pushed away from the working position, the bonding strength measuring device 4 is fixed to the working position in the same way, the anchor rod with the internal thread is connected and fixed with the expansion bolt on the cylindrical body to be measured, the anchor rod is clamped by the anchor rod drawing instrument 42 and the clamp 43, then starting an external pressurizing device to perform a test, wherein the test content is as follows:

1. and (3) testing the damage area of the joint surface of the sprayed concrete and the surrounding rock, filling cement into an enamel disc, wherein the cement must be flat, placing a soft film on the fracture surface of the test piece, placing the soft film into the enamel disc together, and drawing a circle along the periphery of the test piece by using a pen. Scanning to a computer, and calculating the area by using CAD;

2. testing the intersection angle of the fracture surface and the cross section of the core sample, transversely placing the test piece on a piece of blank paper for fixing the position, drawing a side line of the test piece, paying attention to the extension line, finding the highest point and the lowest point of the fracture surface, and drawing the angle between the side line and the highest point and the lowest point;

3. the bond strength of the shotcrete and the surrounding rock was calculated as follows:

in the formula: rc-bond strength of shotcrete and surrounding rock, unit: MPa;

pc-measured breaking force, unit: n;

ac-actual measurement of the damage area of the joint surface of the sprayed concrete and the surrounding rock, unit: mm (mm) ² ；

Intersection angle of alpha-measured fracture surface and cross section of core sample, unit: degree.

The utility model discloses simple structure, fixed convenient, convenient operation, safe and reliable can adapt to various site conditions, and the intensity of cohering between detectable shotcrete and the rock mass contact surface has the significance to improving detection accuracy and efficiency, reducing the detection cost, guaranteeing shotcrete and strut the quality, is fit for extensive popularization and application.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the scope of the invention in its corresponding aspects.

Claims (10)

1. The utility model provides a portable shotcrete bonds intensity testing arrangement, its characterized in that includes fixing device, chute board, bores core device and bonding strength survey device, fixing device fixed mounting is on the rock face, chute board fixed mounting be in fixing device is last, bore core device and slide and set up on the chute board, bonding strength survey device slides and sets up on the chute board.

2. The portable shotcrete bonding strength testing device of claim 1, wherein the sliding plate includes a sliding plate body and two first limit bolts, the sliding plate body is mounted on the fixing device through bolts, trapezoidal sliding grooves are symmetrically formed in the sliding plate body, rectangular grooves are formed in the sliding plate body, first through holes are formed in the sliding plate body, observation ports are symmetrically formed in the sliding plate body, first threaded holes are symmetrically formed in two sides of the sliding plate body, the first limit bolts are screwed in the sliding plate body through the first threaded holes, and the first limit bolts penetrate through side walls of the sliding plate body and extend into the trapezoidal sliding grooves.

3. The portable shotcrete bonding strength testing device of claim 2, wherein the core drilling device comprises a first sliding support, a second sliding support, a drilling machine, a cutting bit, a lead screw and a locknut, the first sliding support is slidably disposed on the chute plate main body, the second sliding support is slidably disposed on the first sliding support, the drilling machine is fixedly disposed on the second sliding support, the drilling machine is communicated with an external power source through a wire, the cutting bit is detachably disposed on the drilling machine, the lead screw is rotatably disposed on the second sliding support, the locknut is disposed at the bottom of the lead screw, and a handle is disposed at the tail of the lead screw.

4. The portable shotcrete bonding strength testing device of claim 3, wherein the first sliding bracket comprises a first sliding plate, a guide rod, a tail mounting plate and a second limit bolt, the guide rod is symmetrically arranged on the first sliding plate, the tail mounting plate is fixedly mounted at the tail end of the guide rod, the second limit bolt penetrates through the first sliding plate and is in threaded connection with the first sliding plate, the diameter of the second limit bolt is the same as the width of the rectangular groove on the sliding groove plate main body, and the position of the second limit bolt corresponds to the rectangular groove.

5. The portable shotcrete bonding strength testing device of claim 4, wherein the first sliding plate is further symmetrically provided with a first trapezoidal sliding block and a third threaded hole, the first trapezoidal sliding block is matched with the trapezoidal sliding groove for use, and the third threaded hole is matched with the first limiting bolt and the first threaded hole for use.

6. The portable shotcrete bonding strength testing device of claim 2, wherein the bonding strength measuring device comprises a third sliding support, an anchor rod drawing instrument and a clamp, the third sliding support is slidably arranged on the chute plate main body, the anchor rod drawing instrument is fixedly arranged on the third sliding support, the anchor rod drawing instrument is connected with an external pressurizing device through a pipeline, and the clamp is arranged at the tail of the anchor rod drawing instrument.

7. The portable shotcrete bonding strength testing device of claim 6, wherein the third sliding support includes a third sliding plate, a supporting rod, a first mounting plate, a second mounting plate and a third limiting bolt, the supporting rod is symmetrically disposed on the third sliding plate, the first mounting plate is fixedly mounted at the middle section of the supporting rod, the second mounting plate is mounted at the tail of the supporting rod, the third limiting bolt passes through the third sliding plate and is in threaded connection with the third sliding plate, the diameter of the third limiting bolt is the same as the width of the rectangular groove on the main body of the chute plate, and the position of the third limiting bolt corresponds to the rectangular groove.

8. The portable shotcrete bonding strength testing device of claim 7, wherein a second trapezoidal sliding block and a fourth threaded hole are symmetrically arranged on the third sliding plate, the second trapezoidal sliding block is matched with the trapezoidal sliding groove for use, and the fourth threaded hole is matched with the first limiting bolt and the first threaded hole for use.

9. The portable shotcrete bonding strength testing device of claim 1, wherein the fixing device comprises a bearing plate and expansion bolt sets, the expansion bolt sets are arranged at four corners of the bearing plate, and the bearing plate is provided with round holes.

10. The portable shotcrete bonding strength testing apparatus of claim 9, wherein the expansion bolt set includes an expansion bolt shaft, a first adjusting nut and a second adjusting nut, the expansion bolt shaft passes through the bearing plate at a tail end thereof, and the first adjusting nut and the second adjusting nut are respectively disposed at two ends of the bearing plate.

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