CN114235573A - Dynamic and static drawing test device and method for anchor rod or anchor cable - Google Patents

Dynamic and static drawing test device and method for anchor rod or anchor cable Download PDF

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Publication number
CN114235573A
CN114235573A CN202111482543.8A CN202111482543A CN114235573A CN 114235573 A CN114235573 A CN 114235573A CN 202111482543 A CN202111482543 A CN 202111482543A CN 114235573 A CN114235573 A CN 114235573A
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China
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transverse
platform
anchor rod
anchor cable
fixedly connected
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薛飞
林锺钦
吴松华
沙鹏
王天佐
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University of Shaoxing
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University of Shaoxing
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Priority to CN202111482543.8A priority Critical patent/CN114235573A/en
Publication of CN114235573A publication Critical patent/CN114235573A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02Details
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/30Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
    • G01N3/303Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight generated only by free-falling weight

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

A dynamic and static drawing test device and method for an anchor rod or an anchor cable are disclosed, and the device comprises: two fixed bearing platforms with fixed guide rails are fixedly connected to the left part and the right part of the upper end of the supporting base at intervals left and right; the pressure-pull transshipment mechanism consists of a transverse loading platform, a pressure-pull transshipment unit, a fixed platform and a hexagonal steel pipe; the lower end of the transverse loading platform is provided with a transverse chute; a pair of guide inclined plates are arranged at the inner ends of the counter-rotating carrying platforms, and a transverse channel is formed between the guide inclined plates and the counter-rotating carrying platforms; the fixed table is matched with the pair of transfer tables; the left side and the right side of the lower end of the wedge-shaped loading block are provided with loading inclined planes, and the lower end of the wedge-shaped loading block is arranged between the upper ends of the two pressing-pulling transferring units. The method comprises the following steps: fixing the testing device; anchoring an anchor rod or an anchor cable to be tested in the hexagonal steel pipe; and applying a load to carry out a test, and recording data. The device can truly restore the actual working state of the anchor rod or the anchor cable; the method has simple steps and simple operation, and can be helpful for obtaining the anchoring support parameters under the real application condition.

Description

Dynamic and static drawing test device and method for anchor rod or anchor cable
Technical Field
The invention relates to the technical field of anchoring support, in particular to a device and a method for testing dynamic and static drawing of an anchor rod or an anchor cable.
Background
The anchor rod or anchor cable support is an active reinforcement technology widely applied to underground engineering, slope engineering and water conservancy engineering, the anchoring performance and mechanical behavior of the anchor rod or anchor cable under different geological and engineering environments are important basis for anchor support parameter design, and the anchor rod or anchor cable support is generally obtained through laboratory or field test.
In the indoor anchoring test, the static drawing test is the most developed one, in the test, a steel pipe or an artificial rock sample (concrete) is generally adopted to simulate an engineering rock mass, an anchor rod or an anchor cable is anchored in the steel pipe or the artificial rock sample through resin anchoring agents or cement mortar, then a hollow jack or an electro-hydraulic servo drawing tester is adopted to carry out tensile loading (as shown in fig. 1 and fig. 2), and an interface bonding sliding stress-strain curve of the anchor rod or the anchor cable in the drawing process is obtained. When the hollow jack is used for loading, the problems of low precision degree of equipment and difficult control of data errors often exist because the jack loading capacity is limited and the data acquisition frequency and precision cannot meet the test requirements. When the electro-hydraulic servo testing machine is used for loading, the existing test is directly drawn in a mode of clamping two ends of an anchoring sample, on one hand, the end part needs to apply larger clamping force, stress concentration is easily generated at the clamping end, and the clamping damage of an anchor rod or an anchor cable body occurs under the drawing mode, on the other hand, the length of the testable anchoring sample is generally limited within the range of 300-500 mm due to the limitation of the vertical space of the testing machine, the condition of on-site anchoring length (2000-3000 mm) cannot be completely reduced, and therefore real test data cannot be obtained.
In addition to a static drawing test, in order to obtain rock mass anchoring support design parameters under dynamic disaster conditions such as rock burst and rock burst, a dynamic drawing test of an anchor rod or an anchor cable is generally carried out through a drop hammer impact test. In addition, as the anchor rod or the anchor cable in the prior art is in a zero-load state (namely is not subjected to pre-tensioning force load), and the anchor rod or the anchor cable on site is generally in a combined action of 100-plus-200 kN pre-tensioning force and surrounding rock deformation additional pressure of roadway support, the impact resistance of the anchor rod or the anchor cable is far smaller than the impact resistance of an unloaded anchor rod or the anchor cable, so that the test result is inconsistent with the actual result.
Based on the above shortcomings, a set of anchor rod or anchor cable drawing testing device which can truly reduce the actual working state of the anchor rod or anchor cable (as shown in fig. 3) and is suitable for a conventional rock mechanics testing machine is urgently needed, so that the mechanical characteristics and deformation characteristics of the anchor rod or anchor cable anchoring body under different dynamic and static loading conditions can be better researched, and a theoretical basis is provided for anchor rod or anchor cable support design and failure control.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a device and a method for testing dynamic and static drawing of an anchor rod or an anchor cable, wherein the device is reasonable in structure and convenient to operate, can truly restore the actual working state of the anchor rod or the anchor cable, can better research the mechanical characteristics and deformation characteristics of an anchor rod or an anchor cable anchoring body under different dynamic and static loading conditions, and can provide a theoretical basis for anchor rod or anchor cable support design and failure control. The method has simple steps and simple operation, can effectively perform the drawing test on the anchor rod or the anchor cable, and is beneficial to obtaining the anchoring support parameters under the real application condition.
In order to achieve the aim, the invention provides a dynamic and static drawing test device for an anchor rod or an anchor cable, which comprises a support base, a fixed bearing platform, a pressing and pulling transfer mechanism and a wedge-shaped loading block, wherein the support base is provided with a bearing plate;
the length direction of the supporting base extends along the left-right direction; the fixed bearing table is horizontally arranged, and the upper end of the fixed bearing table is fixedly connected with a fixed guide rail extending in the left-right direction; the two fixed bearing tables are fixedly connected to the left part and the right part of the upper end of the supporting base at intervals left and right;
the number of the pressing-pulling transshipment mechanisms is two, and each pressing-pulling transshipment mechanism consists of a transverse loading platform, a pressing-pulling transshipment unit, a fixing platform and a hexagonal steel pipe; the transverse loading platform is horizontally arranged, and the lower end of the transverse loading platform is provided with a transverse sliding chute extending in the left-right direction; the pressure-pulling transfer unit consists of a pair of counter-rotating carrying platforms which are arranged at intervals in the front-back direction and fixedly connected to the upper part of the inner end of the transverse loading platform, one side of the inner end of each counter-rotating carrying platform is provided with a pair of guide inclined plates with high outer parts and low inner parts, and a transverse channel is formed between the pair of transfer platforms; the fixing table is fixedly connected to the upper part of the outer end of the transverse loading table opposite to the pressing and pulling transferring unit, and a transverse through hole is formed in the part of the center of the fixing table corresponding to the transverse channel; the outer edge of the section of the hexagonal steel pipe is in a regular hexagon shape, the hexagonal steel pipe is transversely arranged between the press-pull transfer unit and the fixing table, the inner end of the hexagonal steel pipe is fixedly connected in a transverse channel between a pair of transfer tables, the outer end of the hexagonal steel pipe is fixedly abutted against one side of the inner end of the fixing table, and the inner cavity of the hexagonal steel pipe and the transverse through hole are coaxially arranged;
the two pressing-pulling transshipment mechanisms are arranged above the two fixed bearing tables in a left-right opposite mode, and the transverse loading table is sleeved on the fixed guide rail in a sliding mode through the transverse sliding groove so as to realize sliding fit of the pressing-pulling transshipment mechanisms and the fixed bearing tables in the left-right direction;
the upper end of the wedge-shaped loading block is of a horizontally extending plane structure, the upper part of the left end and the upper part of the right end of the wedge-shaped loading block are of vertically extending plane structures, the lower part of the left end and the lower part of the right end of the wedge-shaped loading block are loading inclined planes which are obliquely arranged from high outside to low inside, and the middle part of the lower end of the wedge-shaped loading block corresponds to the transverse channel and is provided with a transverse through groove which is communicated in the left-right direction; the lower end of the wedge-shaped loading block is arranged between the upper ends of the two pressure-pull transferring units, and the loading inclined planes on the two sides are respectively in sliding fit with the opposite surfaces of the guide inclined plates in the two pressure-pull transferring units.
Preferably, the supporting base is composed of a supporting bottom plate, two supporting top plates and two vertical supports, and the two supporting top plates are arranged on the left part and the right part above the supporting bottom plate at intervals left and right; the two vertical supports are correspondingly arranged below the two supporting top plates, the upper ends of the vertical supports are fixedly connected with the lower end faces of the supporting top plates, and the lower ends of the vertical supports are fixedly connected with the upper end faces of the supporting bottom plates; the middle part of the upper end of the supporting bottom plate is fixedly connected with a first limiting block between the two vertical supports, and the height of the first limiting block is lower than that of the vertical supports.
Further, in order to facilitate assembly and separation, a first bolt hole matched with a rock mechanical testing machine or a drop hammer impact testing platform is formed in the periphery of the supporting base plate; a plurality of bolt holes II are formed in the supporting top plate; a plurality of bolt holes III are formed in the fixed bearing platform, and the fixed bearing platform is fixedly connected with the supporting base through first connecting bolts penetrating through the bolt holes III and the bolt holes II.
Furthermore, in order to facilitate assembly and separation, a plurality of bolts IV are arranged on the transverse loading platform; a plurality of bolt holes V are formed in the rotating platform and are fixedly connected with the transverse loading platform through connecting bolts II penetrating through the bolt holes IV and the bolt holes V; and a plurality of bolt holes six are formed in the fixing platform, and the fixing platform is fixedly connected with the transverse loading platform through connecting bolts three penetrating through the bolt holes four and the bolt holes six.
Furthermore, in order to ensure the stability and reliability of the sliding fit between the pressing-pulling transferring mechanism and the fixed bearing platform, the sections of the fixed guide rail and the transverse sliding groove are both in a dovetail shape.
Furthermore, in order to be capable of limiting the wedge-shaped loading block longitudinally in time when the test reaches a set state, the upper ends of the pair of inclined guide plates are both in a planar structure in the same pressure-pull transfer unit; the left side and the right side of the upper end of the wedge-shaped loading block are respectively and fixedly connected with a pair of second limiting blocks which are arranged at intervals from front to back; and a pair of limiting blocks II on the same side are respectively in limiting fit with the upper ends of a pair of guide inclined plates in the same pressure-pull transfer unit.
Further, in order to facilitate radial limiting of the hexagonal steel pipes and axial positioning of the inner ends of the hexagonal steel pipes, the transfer platform further comprises a transfer connecting plate located at the bottom, a vertical plate located on the outer side of the guide inclined plate and a reinforcing connecting plate located on the outer side of the vertical plate, the transfer connecting plate is fixedly connected with the transverse loading platform, the lower end of the guide inclined plate is fixedly connected with the inner end of the upper end face of the transfer connecting plate, the lower end of the vertical plate is fixedly connected with the middle of the upper end face of the transfer connecting plate, and the upper end of the vertical plate is connected with the upper end of the guide inclined plate and is of a planar structure; one end of the reinforcing connecting plate is fixedly connected with the outer end of the upper end face of the transshipment connecting plate, and the other end of the reinforcing connecting plate is fixedly connected with the outer side face of the vertical plate; in the same pressure-pull transferring unit, one end of each vertical plate between the pair of transferring tables, which is opposite to the other end, is provided with a pair of limiting clamping grooves; the inner end of the hexagonal steel pipe is fixedly arranged in the pair of limiting clamping grooves and is limited through the pair of limiting clamping grooves.
According to the invention, stable and reliable support can be provided for the testing device through the arrangement of the supporting base; the upper end of the bottom support is fixedly connected with a fixed bearing platform with a fixed guide rail, and the bottom of a sliding bearing platform in the pressing-pulling transferring mechanism is provided with a transverse sliding chute matched with the fixed guide rail, so that the pressing-pulling transferring mechanism and the fixed bearing platform can transversely slide in the left-right direction; the guide inclined plate is arranged at the inner end of the transfer platform of the pressure-pull transfer mechanism, a wedge-shaped groove can be formed between the two pressure-pull transfer mechanisms, and meanwhile, the loading inclined planes are arranged on the two sides of the lower end of the wedge-shaped loading block, so that the vertical load applied to the top of the wedge-shaped loading block can be converted into the load transversely acting on the two pressure-pull transfer mechanisms, and thus, the static and dynamic compression load applied to the top of the wedge-shaped loading block can be converted into a pair of static and dynamic tensile loads acting on the two hexagonal steel pipes, so that the pulling load can be applied to the anchor rod or the anchor cable without adopting a clamping mode, the test failure caused by the clamping damage due to stress concentration in the clamping position in the conventional pulling test method is avoided, and meanwhile, the conventional universal mechanical test machine is conveniently selected as a loading source, and the problems that the loading capacity of the conventional hollow jack is limited, the loading precision is high, and the loading precision is high, The frequency of data acquisition is low. By arranging the transverse through groove communicated in the left-right direction corresponding to the transverse channel in the middle of the lower end of the wedge-shaped loading block, the anchor rod or the anchor cable to be tested cannot be vertically extruded in the downward moving process of the wedge-shaped loading block, so that the drawing test can be further ensured not to be interfered by vertical load, and the accurate drawing test is ensured; in addition, the testing machine only needs to provide compression load, the requirement on testing equipment is low, the testing machine does not need to have a stretching function, the testing machine can be widely applied to universal testing machines with various specifications, and the anchor rod or the anchor cable anchoring test piece is tested in a horizontally placed mode, so that the space in the vertical direction is not limited, the static pull-out strength test of the anchor rod or the anchor cable with large anchoring length can be realized, and the limitation of the existing testing device on the testing length is solved. Moreover, because two hexagonal steel pipes which are separately arranged are adopted to simulate surrounding rocks, the exposed end of the anchor rod or the anchor cable on one side can be used for simulating the exposed end of the anchor rod or the anchor cable on the site, and the anchor rod or the anchor cable on one side is fixed on one side of the fixing table by adopting the fixing nut, the supporting plate can be effectively simulated, the pre-tensioning force can be conveniently applied, the acting position of the applied drawing force is positioned in the middle of the anchor rod or the anchor cable anchoring test piece instead of one end of the anchor rod or the anchor cable in the prior art, the acting state of the applied drawing force is more consistent with the actual working state of the anchor rod or the anchor cable on the site, and the obtained anchoring mechanical behavior of the anchor rod or the anchor cable is more reliable and accurate. The invention can also be arranged in a drop hammer testing machine, and can convert the impact force formed by the drop hammer falling into dynamic drawing force, thereby obtaining the dynamic drawing mechanical behavior of the anchor rod or the anchor cable. The invention provides a dynamic and static drawing test device for an anchor rod or an anchor cable loaded by pressure-tension conversion, which has the advantages of simple structure and convenient operation, and is convenient to popularize and apply to various conventional mechanical test machines. In conclusion, the invention can overcome the technical problems of concentrated clamping stress, limited anchoring length and incapability of restoring the actual working state of the anchor rod or the anchor cable in the conventional anchor rod or anchor cable drawing test, has simple structure and convenient operation, and can be suitable for various conventional rock mechanical testing machines and drop hammer impact testing machines.
The invention also provides a dynamic and static drawing test method for the anchor rod or the anchor cable, which comprises the following steps:
the method comprises the following steps: firstly, fixing a support base plate on a rock mechanical pressure testing machine or a drop hammer impact testing platform through fastening bolts so as to fix a support base; the two fixed bearing tables are respectively and fixedly connected to the upper ends of the two supporting top plates through a first connecting bolt; then, the transverse loading platforms in the two pressure-pull transferring mechanisms are assembled on the two fixed bearing platforms in a sliding manner, and the pressure-pull transferring units in the two pressure-pull transferring mechanisms are fixedly connected to the inner ends of the transverse loading platforms through second connecting bolts, so that the inner ends of the hexagonal steel pipes are fixedly clamped in a pair of limiting clamping grooves between a pair of the fixed bearing platforms;
step two: firstly, an anchor rod or an anchor cable to be tested is arranged in the two hexagonal steel pipes in a penetrating way through the transverse passages in the two pressure-pull transfer units, and the positions of the two fixed bearing platforms are adjusted in a sliding way, so that the two fixed bearing platforms are maintained in a butt joint state, and the two ends of the anchor rod or the anchor cable to be tested are respectively exposed outside the outer ends of the two hexagonal steel pipes; anchoring an anchor rod or an anchor cable to be tested in the hexagonal steel pipes in the two pressure-pull load transferring mechanisms by adopting a resin anchoring agent or a cement-based anchoring agent to serve as an anchoring test piece to be tested;
step three: sleeving a transverse through hole of a fixing table in the pressure-pull transshipment mechanism outside the exposed end of the anchor rod or the anchor cable, adjusting the position of the fixing table to enable one side of the inner end of the fixing table to abut against the outer end of the hexagonal steel pipe, and fixedly connecting the fixing table with a transverse loading table through a third connecting bolt so as to match with the pressure-pull transshipment unit to axially position the hexagonal steel pipe;
step four: sleeving a pressure sensor outside the exposed end of the anchor rod or the anchor cable with the threaded section, abutting against one side of the outer end of the fixing table, connecting a fixing nut to the outside of the exposed end of the anchor rod or the anchor cable in a threaded fit manner, and abutting one side of the inner end of the fixing nut against one side of the outer end of the pressure sensor; in the process, a fixed platform on one side provided with the pressure sensor simulates a fixed supporting plate;
step five: fastening the fixing nut through a torque wrench or a tension instrument to apply a pre-tightening force of a set value to the anchor rod or the anchor cable so as to simulate the actual working state of the anchor rod or the anchor cable; assembling a wedge-shaped loading block between the upper ends of the two pressure-pull transferring units, and respectively attaching loading inclined planes on two sides of the wedge-shaped loading block to the opposite surfaces of the guide inclined plates in the two pressure-pull transferring units;
step six: the method comprises the steps of starting a rock mechanics testing machine or a drop hammer impact testing machine to apply static and dynamic compression loads on the top of a wedge-shaped loading block, converting the static and dynamic compression loads P into a pair of symmetrical tensile loads T acting on the inner ends of two hexagonal steel pipes through a pressing-pulling transfer mechanism by the wedge-shaped loading block, recording vertical pressure and vertical displacement applied by the testing machine, and combining the pressure value of a pressure sensor to obtain the stress deformation relation of an anchor rod or an anchor cable in the drawing process.
The method has simple steps, can convert the vertical pressure into two horizontal tensile forces acting on the middle part of the anchor rod or anchor cable anchoring test piece, thereby solving the technical problem that the existing testing device can not restore the actual working state of the anchor rod or anchor cable, and because the anchor rod or anchor cable anchoring test piece is tested in a horizontal placement mode, the space in the vertical direction is not limited, the static drawing strength test of the anchor rod or anchor cable with large anchoring length can be realized, and the limitation of the existing testing device on the testing length is solved. Meanwhile, the method is convenient to operate, can quickly and accurately obtain the stress deformation relation of the anchor rod or the anchor cable in the drawing process, can be suitable for various conventional mechanical testing machines, and has a high popularization and application value.
Drawings
FIG. 1 is a schematic structural diagram of a tensile loading process using an electro-hydraulic servo drawing tester in the prior art;
FIG. 2 is a schematic diagram of a prior art configuration using a hollow jack for tensile loading;
FIG. 3 is a schematic diagram of the actual working state of the anchor rod or anchor cable under stress;
FIG. 4 is a schematic structural view of the present invention;
FIG. 5 is a schematic view of the construction of the support base of the present invention;
FIG. 6 is a schematic structural view of a support base and two fixed platforms according to the present invention;
FIG. 7 is a schematic structural view of a press-pull transfer mechanism according to the present invention;
FIG. 8 is a schematic structural view of the pressure-pulling transshipment mechanism of the present invention with the hexagonal steel pipes removed;
FIG. 9 is a schematic structural view of a hexagonal steel pipe according to the present invention;
FIG. 10 is a schematic structural view of a wedge loading block according to the present invention;
fig. 11 is a schematic structural view of the press-pull transfer unit of the present invention.
In the figure: 1. the device comprises a supporting base, 2, a pressure-pull transshipment mechanism, 3, a wedge-shaped loading block, 4, a fixed bearing platform, 5, a hexagonal steel pipe, 6, an anchor rod or an anchor cable, 7, a fixed platform, 8, a pressure sensor, 9, a fixing nut, 10, a fixed guide rail, 11, a transverse loading platform, 12, a pressure-pull transshipment unit, 13, a transverse chute, 14, a guide inclined plate, 15, a transshipment platform, 16, a loading inclined plane, 17, a transverse channel, 18, a transverse through hole, 19, a transverse through groove, 20, a supporting bottom plate, 21, a supporting top plate, 22, a vertical support, 23, a first limiting block, 24, a first bolt hole, 25, a second bolt hole, 26, a second limiting block, 27, a limiting clamping groove, 28, a transshipment connecting plate, 29, a vertical plate, 30, a reinforcing connecting plate, 31, a groove space, 32 and a third stud hole.
Detailed Description
The invention will be further explained with reference to the drawings.
As shown in fig. 4 to 11, the invention provides a dynamic and static pulling test device for an anchor rod or an anchor cable, which comprises a support base 1, a fixed bearing platform 4, a pressing and pulling load transferring mechanism 2 and a wedge-shaped loading block 3;
the length direction of the supporting base 1 extends along the left-right direction, and a concave groove space 31 is formed in the central area of the supporting base; the fixed bearing table 4 is horizontally arranged, the upper end of the fixed bearing table 4 is fixedly connected with a fixed guide rail 10 extending in the left-right direction, and preferably, two ends of the fixed guide rail 10 are respectively flush with two ends of the fixed bearing table 4; the two fixed bearing platforms 4 are fixedly connected to the left part and the right part of the upper end of the supporting base 1 at intervals left and right, and preferably, the inner ends of the two fixed bearing platforms 4 are respectively flush with the left end and the right end of the groove space 31;
the number of the pressing-pulling transferring mechanisms 2 is two, and each pressing-pulling transferring mechanism 2 consists of a transverse loading table 11, a pressing-pulling transferring unit 12, a fixing table 7 and a hexagonal steel pipe 5; the transverse loading platform 11 is horizontally arranged, and the lower end of the transverse loading platform is provided with a transverse sliding chute 13 extending in the left-right direction; the pressure-pull transfer unit 12 consists of a pair of transfer platforms 15 which are arranged at intervals in the front-back direction and fixedly connected to the upper part of the inner end of the transverse loading platform 11, one side of the inner end of each transfer platform 15 is provided with a pair of guide inclined plates 14 with high outer parts and low inner parts, a transverse channel 17 is formed between the pair of transfer platforms 15, and the size of the transverse channel 17 is slightly larger than that of the anchor rod or the anchor cable 6 so as to ensure that the transverse channel 17 cannot generate interference in the test process; the fixing table 7 is fixedly connected to the upper part of the outer end of the transverse loading table 11 opposite to the pressing and pulling transferring unit 12, and a transverse through hole 18 is formed in the part of the center of the fixing table corresponding to the transverse channel 17; the outer edge of the section of the hexagonal steel pipe 5 is a regular hexagon, the hexagonal steel pipe is transversely arranged between the press-pull transfer unit 12 and the fixed table 7, the inner end of the hexagonal steel pipe is fixedly connected in a transverse channel 17 between a pair of transfer tables 15, the outer end of the hexagonal steel pipe is fixedly abutted against one side of the inner end of the fixed table 7, and the inner cavity of the hexagonal steel pipe 5 and the transverse through hole 18 are coaxially arranged;
the two pressing-pulling transshipment mechanisms 2 are oppositely arranged above the two fixed bearing tables 4 from left to right, and the transverse loading table 11 is slidably sleeved on the fixed guide rail 10 through the transverse sliding chute 13 so as to realize the sliding fit of the pressing-pulling transshipment mechanisms 2 and the fixed bearing tables 4 in the left and right directions;
the upper end of the wedge-shaped loading block 3 is of a horizontally extending plane structure, the upper part of the left end and the upper part of the right end of the wedge-shaped loading block are of vertically extending plane structures, the lower part of the left end and the lower part of the right end of the wedge-shaped loading block are loading inclined planes 16 which are obliquely arranged from high outside to low inside, and the middle part of the lower end of the wedge-shaped loading block corresponds to a transverse channel 17 and is provided with a transverse through groove 19 which is communicated in the left-right direction; the bottom ends of the loading inclined plane 16 at the left side and the loading inclined plane 16 at the right side of the wedge-shaped loading block 3 are intersected to form a V-shaped structure; the lower end of the wedge-shaped loading block 3 is arranged between the upper ends of the two pressure-pull transferring units 12, and the loading inclined planes 16 on the two sides are respectively in sliding fit with the opposite surfaces of the guide inclined plates 14 in the two pressure-pull transferring units 12.
Preferably, the supporting base 1 is composed of a supporting bottom plate 20, two supporting top plates 21 and two vertical supports 22, wherein the two supporting top plates 21 are arranged on the left part and the right part above the supporting bottom plate 20 at intervals left and right; the two vertical supports 22 are correspondingly arranged below the two supporting top plates 21, the upper ends of the vertical supports 22 are fixedly connected with the lower end faces of the supporting top plates 21, and the lower ends of the vertical supports 22 are fixedly connected with the upper end faces of the supporting bottom plates 20; a first limiting block 23 is fixedly connected between the two vertical supports 22 in the middle of the upper end of the supporting bottom plate 20, and the height of the first limiting block 23 is lower than that of the vertical supports 22; preferably, the inner ends of the two top support plates 21 and the inner ends of the two vertical supports 22 are arranged in a flush manner, and the groove space 31 is formed in a space between the first limiting block 23, the two vertical supports 22 and the two top support plates 21.
In order to facilitate assembly and separation, a first bolt hole 24 matched with a rock mechanics testing machine or a drop hammer impact testing platform is formed in the periphery of the supporting base plate 20; a plurality of bolt holes II 25 are formed in the supporting top plate 21; and a plurality of bolt holes III 32 are formed in the fixed bearing platform 4, and the fixed bearing platform is fixedly connected with the support base 1 through first connecting bolts penetrating through the bolt holes III 32 and the bolt holes II 25.
In order to facilitate assembly and separation, a plurality of bolts four are arranged on the transverse loading platform 11; a plurality of bolt holes five are formed in the rotating platform 15 and are fixedly connected with the transverse loading platform 11 through connecting bolts two penetrating through the bolt holes four and the bolt holes five; and a plurality of bolt holes six are formed in the fixing platform 7, and the fixing platform is fixedly connected with the transverse loading platform 11 through connecting bolts three penetrating through the bolt holes four and the bolt holes six.
In order to ensure the stability and reliability of the sliding fit between the pressure-pull transfer mechanism and the fixed bearing platform, the sections of the fixed guide rail 10 and the transverse sliding groove 13 are both in a dovetail shape.
In order to longitudinally limit the wedge-shaped loading block in time when a test reaches a set state, the upper ends of a pair of inclined guide plates 14 are both in a plane structure in the same pressure-pull transferring unit 12; the left side and the right side of the upper end of the wedge-shaped loading block 3 are respectively and fixedly connected with a pair of second limiting blocks 26 which are arranged at intervals from front to back; the pair of second limit blocks 26 on the same side are in limit fit with the upper ends of the pair of inclined guide plates 14 in the same pressure-pull transfer unit 12 respectively, when the second limit blocks 26 abut against the upper ends of the inclined guide plates 14, the wedge-shaped loading block 3 reaches the downward maximum stroke position, and at the moment, the upper end of the transverse through groove 19 is in clearance fit with the anchor rod or anchor cable 6 to be tested.
In order to facilitate radial limiting of the hexagonal steel pipes and axial positioning of the inner ends of the hexagonal steel pipes, the transfer platform 15 further comprises a transfer connecting plate 28 located at the bottom, a vertical plate 29 located on the outer side of the inclined guide plate 14 and a reinforcing connecting plate 30 located on the outer side of the vertical plate 29, the transfer connecting plate 28 is fixedly connected with the transverse loading platform 11, the lower end of the inclined guide plate 14 is fixedly connected with the inner end of the upper end face of the transfer connecting plate 28, the lower end of the vertical plate 29 is fixedly connected with the middle of the upper end face of the transfer connecting plate 28, and the upper end of the vertical plate is connected with the upper end of the inclined guide plate 14 and is of a planar structure; one end of the reinforcing connecting plate 30 is fixedly connected with the outer end of the upper end face of the transshipment connecting plate 28, and the other end of the reinforcing connecting plate is fixedly connected with the outer side face of the vertical plate 29; in the same pressure-pull transferring unit 12, a pair of limiting clamping grooves 27 are formed at the opposite ends of two vertical plates 29 between a pair of transferring tables 15; the inner ends of the hexagonal steel pipes 5 are fixedly arranged in the pair of limiting clamping grooves 27 and are limited through the pair of limiting clamping grooves 27 to prevent the hexagonal steel pipes 5 from rotating in the radial direction, so that the hexagonal steel pipes 5 can be stably fixed in the axial direction and the radial direction through the pair of pressing and pulling transfer units (12) and the fixing table (7). Because the lower extreme of direction swash plate 14 and the lower extreme of riser 29 all with reprint connecting plate 28 fixed connection, and the upper end of direction swash plate 14 and the upper end fixed connection of riser 29, just so formed stable triangle-shaped structure, can guarantee effectively to bear the load in the loading process of vertical load to convert it into horizontal thrust. Through the setting of strengthening the connecting plate 30, can support the outside of riser 29, and then can guarantee the bearing strength of riser 29, simultaneously, it can shift the power that riser 29 bore to the reprint connecting plate 28 on to can be better turn into the thrust on the horizontal direction with vertical load.
According to the invention, stable and reliable support can be provided for the testing device through the arrangement of the supporting base; the upper end of the bottom support is fixedly connected with a fixed bearing platform with a fixed guide rail, and the bottom of a sliding bearing platform in the pressing-pulling transferring mechanism is provided with a transverse sliding chute matched with the fixed guide rail, so that the pressing-pulling transferring mechanism and the fixed bearing platform can transversely slide in the left-right direction; the guide inclined plate is arranged at the inner end of the transfer platform of the pressure-pull transfer mechanism, a wedge-shaped groove can be formed between the two pressure-pull transfer mechanisms, and meanwhile, the loading inclined planes are arranged on the two sides of the lower end of the wedge-shaped loading block, so that the vertical load applied to the top of the wedge-shaped loading block can be converted into the load transversely acting on the two pressure-pull transfer mechanisms, and thus, the static and dynamic compression load applied to the top of the wedge-shaped loading block can be converted into a pair of static and dynamic tensile loads acting on the two hexagonal steel pipes, so that the pulling load can be applied to the anchor rod or the anchor cable without adopting a clamping mode, the test failure caused by the clamping damage due to stress concentration in the clamping position in the conventional pulling test method is avoided, and meanwhile, the conventional universal mechanical test machine is conveniently selected as a loading source, and the problems that the loading capacity of the conventional hollow jack is limited, the loading precision is high, and the loading precision is high, The frequency of data acquisition is low. By arranging the transverse through groove communicated in the left-right direction corresponding to the transverse channel in the middle of the lower end of the wedge-shaped loading block, the anchor rod or the anchor cable to be tested cannot be vertically extruded in the downward moving process of the wedge-shaped loading block, so that the drawing test can be further ensured not to be interfered by vertical load, and the accurate drawing test is ensured; in addition, the testing machine only needs to provide compression load, the requirement on testing equipment is low, the testing machine does not need to have a stretching function, the testing machine can be widely applied to universal testing machines with various specifications, and the anchor rod or the anchor cable anchoring test piece is tested in a horizontally placed mode, so that the space in the vertical direction is not limited, the static pull-out strength test of the anchor rod or the anchor cable with large anchoring length can be realized, and the limitation of the existing testing device on the testing length is solved. Moreover, because two hexagonal steel pipes which are separately arranged are adopted to simulate surrounding rocks, the exposed end of the anchor rod or the anchor cable on one side can be used for simulating the exposed end of the anchor rod or the anchor cable on the site, and the anchor rod or the anchor cable on one side is fixed on one side of the fixing table by adopting the fixing nut, the supporting plate can be effectively simulated, the pre-tensioning force can be conveniently applied, the acting position of the applied drawing force is positioned in the middle of the anchor rod or the anchor cable anchoring test piece instead of one end of the anchor rod or the anchor cable in the prior art, the acting state of the applied drawing force is more consistent with the actual working state of the anchor rod or the anchor cable on the site, and the obtained anchoring mechanical behavior of the anchor rod or the anchor cable is more reliable and accurate. The invention can also be arranged in a drop hammer testing machine, and can convert the impact force formed by the drop hammer falling into dynamic drawing force, thereby obtaining the dynamic drawing mechanical behavior of the anchor rod or the anchor cable. The invention provides a dynamic and static drawing test device for an anchor rod or an anchor cable loaded by pressure-tension conversion, which has the advantages of simple structure, convenience in operation and convenience in popularization and application in various conventional rock mechanical test machines. In conclusion, the invention can overcome the technical problems of concentrated clamping stress, limited anchoring length and incapability of restoring the actual working state of the anchor rod or the anchor cable in the conventional anchor rod or anchor cable drawing test, has simple structure and convenient operation, and can be suitable for various conventional rock mechanical testing machines and drop hammer impact testing machines.
The invention also provides a dynamic and static drawing test method for the anchor rod or the anchor cable, which comprises the following steps:
the method comprises the following steps: firstly, fixing a support base plate 20 on a rock mechanical pressure testing machine or a drop hammer impact testing platform through fastening bolts so as to fix a support base 1; the two fixed bearing tables 4 are respectively and fixedly connected to the upper ends of the two supporting top plates 21 through first connecting bolts; then, the transverse loading platforms 11 in the two pressure-pull transferring mechanisms 2 are assembled on the two fixed bearing platforms 4 in a sliding manner, the pressure-pull transferring units 12 in the two pressure-pull transferring mechanisms 2 are fixedly connected to the inner ends of the transverse loading platforms 11 through second connecting bolts, and the inner ends of the hexagonal steel pipes 5 are fixedly clamped in a pair of limiting clamping grooves 27 between a pair of counter-rotating platforms 15 so as to radially position the hexagonal steel pipes 5;
step two: firstly, an anchor rod or an anchor cable 6 to be tested is arranged in the two hexagonal steel pipes 5 in a penetrating way through the transverse passages 17 in the two pressure-pull load transferring units 12, and the positions of the two fixed bearing platforms 4 are adjusted in a sliding way, so that the two fixed bearing platforms 4 are maintained in a butt joint state, and the two ends of the anchor rod or the anchor cable 6 to be tested are respectively exposed out of the outer ends of the two hexagonal steel pipes 5; anchoring an anchor rod or an anchor cable 6 to be tested in the hexagonal steel pipes 5 in the two pressure-pull load transferring mechanisms 2 by adopting a resin anchoring agent or a cement-based anchoring agent to serve as an anchoring test piece to be tested;
step three: sleeving a transverse through hole 18 of a fixing table 7 in the press-pull transfer mechanism 2 outside the exposed end of the anchor rod or anchor cable 6, adjusting the position of the fixing table 7 to enable one side of the inner end of the fixing table to abut against the outer end of the hexagonal steel pipe 5, and fixedly connecting the fixing table 7 with a transverse loading table 11 through a third connecting bolt so as to match with the press-pull transfer unit 12 to axially position the hexagonal steel pipe 5;
step four: sleeving a pressure sensor 8 outside the exposed end of the anchor rod or the anchor cable 6 with a threaded section and abutting against one side of the outer end of the fixing table 7, connecting a fixing nut 9 outside the exposed end of the anchor rod or the anchor cable 6 in a threaded fit manner, and abutting one side of the inner end of the fixing nut against one side of the outer end of the pressure sensor 8; in the process, the fixed table 7 arranged at one side of the pressure sensor 8 simulates a fixed supporting plate;
step five: fastening the fixing nut 9 through a torque wrench or a tension instrument to apply a pre-tightening force of a set value to the anchor rod or the anchor cable so as to simulate the actual working state of the anchor rod or the anchor cable 6; assembling the wedge-shaped loading block 3 between the upper ends of the two pressure-pull load transferring units 12, and respectively attaching the loading inclined planes 16 on the two sides of the wedge-shaped loading block to the opposite surfaces of the guide inclined plates 14 in the two pressure-pull load transferring units 12;
step six: the rock mechanics testing machine or the drop hammer impact testing machine is started to apply static and dynamic compression load on the top of the wedge-shaped loading block 3, the wedge-shaped loading block 3 converts the static and dynamic compression load P into a pair of symmetrical tensile loads T acting on the inner ends of the two hexagonal steel pipes 5 through the pressing and pulling transfer mechanism 2, and the stress deformation relation of the anchor rod or the anchor cable 6 in the drawing process can be obtained by recording the vertical pressure and the vertical displacement applied by the testing machine and combining the pressure value of the pressure sensor 8.
The method has simple steps, can convert the vertical pressure into two horizontal tensile forces acting on the middle part of the anchor rod or anchor cable anchoring test piece, thereby solving the technical problem that the existing testing device can not restore the actual working state of the anchor rod or anchor cable, and because the anchor rod or anchor cable anchoring test piece is tested in a horizontal placement mode, the space in the vertical direction is not limited, the static drawing strength test of the anchor rod or anchor cable with large anchoring length can be realized, and the limitation of the existing testing device on the testing length is solved. Meanwhile, the method is convenient to operate, can quickly and accurately obtain the stress deformation relation of the anchor rod or the anchor cable in the drawing process, can be suitable for various conventional mechanical testing machines, and has a high popularization and application value.

Claims (8)

1. The anchor rod or anchor cable dynamic and static drawing testing device comprises a supporting base (1), wherein the length direction of the supporting base (1) extends along the left-right direction; the device is characterized by also comprising a fixed bearing table (4), a pressing-pulling transferring mechanism (2) and a wedge-shaped loading block (3);
the fixed bearing table (4) is horizontally arranged, and the upper end of the fixed bearing table is fixedly connected with a fixed guide rail (10) extending in the left-right direction; the two fixed bearing platforms (4) are fixedly connected to the left part and the right part of the upper end of the supporting base (1) at intervals left and right;
the number of the pressing-pulling transshipment mechanisms (2) is two, and each pressing-pulling transshipment mechanism (2) consists of a transverse loading platform (11), a pressing-pulling transshipment unit (12), a fixing platform (7) and a hexagonal steel pipe (5); the transverse loading platform (11) is horizontally arranged, and the lower end of the transverse loading platform is provided with a transverse sliding chute (13) extending in the left-right direction; the pressure-pull transfer unit (12) consists of a pair of counter-rotating carrying platforms (15) which are arranged at intervals from front to back and fixedly connected to the upper part of the inner end of the transverse loading platform (11), one side of the inner ends of the pair of counter-rotating carrying platforms (15) is provided with a pair of guide inclined plates (14) with high outside and low inside, and a transverse channel (17) is formed between the pair of counter-rotating carrying platforms (15); the fixing platform (7) is fixedly connected to the upper part of the outer end of the transverse loading platform (11) opposite to the pressing and pulling transferring unit (12), and a transverse through hole (18) is formed in the part of the center of the fixing platform corresponding to the transverse channel (17); the outer edge of the section of the hexagonal steel pipe (5) is in a regular hexagon shape, the hexagonal steel pipe is transversely arranged between the press-pull transfer unit (12) and the fixed platform (7), the inner end of the hexagonal steel pipe is fixedly connected in a transverse channel (17) between a pair of transfer platforms (15), the outer end of the hexagonal steel pipe is fixedly abutted against one side of the inner end of the fixed platform (7), and the inner cavity of the hexagonal steel pipe (5) and the transverse through hole (18) are coaxially arranged;
the two pressing-pulling transshipment mechanisms (2) are arranged above the two fixed bearing tables (4) in a left-right opposite mode, and the transverse loading table (11) is sleeved on the fixed guide rail (10) in a sliding mode through the transverse sliding groove (13) so as to realize sliding fit of the pressing-pulling transshipment mechanisms (2) and the fixed bearing tables (4) in the left-right direction;
the upper end of the wedge-shaped loading block (3) is of a horizontally extending plane structure, the upper part of the left end and the upper part of the right end of the wedge-shaped loading block are of vertically extending plane structures, the lower part of the left end and the lower part of the right end of the wedge-shaped loading block are loading inclined planes (16) which are obliquely arranged from high outside to low inside, and the middle part of the lower end of the wedge-shaped loading block corresponds to a transverse channel (17) and is provided with a transverse through groove (19) which is communicated in the left-right direction; the lower end of the wedge-shaped loading block (3) is arranged between the upper ends of the two pressure-pull transferring units (12), and the loading inclined planes (16) on the two sides are respectively in sliding fit with the opposite surfaces of the guide inclined plates (14) in the two pressure-pull transferring units (12).
2. The anchor rod or anchor cable dynamic and static drawing test device according to claim 1, characterized in that the support base (1) is composed of a support bottom plate (20), two support top plates (21) and two vertical supports (22), wherein the two support top plates (21) are arranged at the left part and the right part above the support bottom plate (20) at intervals left and right; the two vertical supports (22) are correspondingly arranged below the two supporting top plates (21), the upper ends of the vertical supports (22) are fixedly connected with the lower end faces of the supporting top plates (21), and the lower ends of the vertical supports (22) are fixedly connected with the upper end faces of the supporting bottom plates (20); the middle part of the upper end of the supporting bottom plate (20) is fixedly connected with a first limiting block (23) between the two vertical supports (22), and the height of the first limiting block (23) is lower than that of the vertical supports (22).
3. The anchor rod or anchor cable dynamic and static drawing test device as claimed in claim 1 or 2, characterized in that the supporting base plate (20) is provided with a first bolt hole (24) matching with a rock mechanics tester or a drop hammer impact test platform at the periphery; a plurality of second bolt holes (25) are formed in the supporting top plate (21); a plurality of bolt holes III (32) are formed in the fixed bearing platform (4), and the fixed bearing platform is fixedly connected with the supporting base (1) through first connecting bolts penetrating through the bolt holes III (32) and the bolt holes II (25).
4. The anchor rod or anchor cable dynamic and static drawing test device as claimed in claim 3, wherein a plurality of bolts four are arranged on the transverse loading platform (11); a plurality of bolt holes V are formed in the rotating platform (15), and the rotating platform is fixedly connected with the transverse loading platform (11) through connecting bolts II penetrating through the bolt holes IV and the bolt holes V; and a plurality of bolt holes six are formed in the fixing platform (7), and the fixing platform is fixedly connected with the transverse loading platform (11) through connecting bolts three penetrating through the bolt holes four and the bolt holes six.
5. The anchor rod or anchor cable dynamic and static drawing test device of claim 4, characterized in that the cross section of the fixed guide rail (10) and the cross chute (13) are both dovetail-shaped.
6. The dynamic and static pulling test device for the anchor rod or the anchor cable is characterized in that the upper ends of a pair of inclined guide plates (14) are both in a plane structure in the same pressing and pulling load transferring unit (12); the left side and the right side of the upper end of the wedge-shaped loading block (3) are respectively and fixedly connected with a pair of second limiting blocks (26) which are arranged at intervals from front to back; the pair of second limiting blocks (26) on the same side are respectively in limiting fit with the upper ends of the pair of inclined guide plates (14) in the same pressing and pulling transfer unit (12).
7. The anchor rod or anchor cable dynamic and static drawing test device as claimed in claim 6, wherein the transfer platform (15) further comprises a transfer connecting plate (28) positioned at the bottom, a vertical plate (29) positioned at the outer side of the inclined guide plate (14), and a reinforcing connecting plate (30) positioned at the outer side of the vertical plate (29), the transfer connecting plate (28) is fixedly connected with the transverse loading platform (11), the lower end of the inclined guide plate (14) is fixedly connected with the inner end of the upper end surface of the transfer connecting plate (28), the lower end of the vertical plate (29) is fixedly connected with the middle part of the upper end surface of the transfer connecting plate (28), and the upper end of the vertical plate is connected with the upper end of the inclined guide plate (14) and has a planar structure; one end of the reinforcing connecting plate (30) is fixedly connected with the outer end of the upper end face of the transshipment connecting plate (28), and the other end of the reinforcing connecting plate is fixedly connected with the outer side face of the vertical plate (29); in the same press-pull transfer unit (12), a pair of limiting clamping grooves (27) are formed in opposite ends of two vertical plates (29) between a pair of transfer platforms (15); the inner ends of the hexagonal steel pipes (5) are fixedly arranged in the pair of limiting clamping grooves (27) and are limited through the pair of limiting clamping grooves (27).
8. A dynamic and static drawing test method for an anchor rod or an anchor cable is characterized by comprising the following steps:
the method comprises the following steps: firstly, fixing a support base plate (20) on a rock mechanical compression testing machine or a drop hammer impact testing platform through fastening bolts so as to fix a support base (1); the two fixed bearing tables (4) are respectively and fixedly connected to the upper ends of the two supporting top plates (21) through first connecting bolts; then, a transverse loading platform (11) in the two pressure-pull transshipment mechanisms (2) is assembled on the two fixed bearing platforms (4) in a sliding manner, pressure-pull transshipment units (12) in the two pressure-pull transshipment mechanisms (2) are fixedly connected to the inner end of the transverse loading platform (11) through a second connecting bolt, and the inner end of the hexagonal steel pipe (5) is fixedly clamped in a pair of limiting clamping grooves (27) between a pair of contra-rotating bearing platforms (15);
step two: firstly, an anchor rod or an anchor cable (6) to be tested is arranged in the two hexagonal steel pipes (5) in a penetrating way through the transverse passages (17) in the two pressing-pulling transferring units (12), and the positions of the two fixed bearing platforms (4) are adjusted in a sliding way, so that the two fixed bearing platforms (4) are maintained in a butting state, and the two ends of the anchor rod or the anchor cable (6) to be tested are respectively exposed out of the outer ends of the two hexagonal steel pipes (5); anchoring an anchor rod or an anchor cable (6) to be tested in the hexagonal steel pipes (5) in the two pressure-pull load transferring mechanisms (2) by adopting a resin anchoring agent or a cement-based anchoring agent to serve as an anchoring test piece to be tested;
step three: sleeving a transverse through hole (18) of a fixing table (7) in the compression-pull load transferring mechanism (2) outside an exposed end of the anchor rod or the anchor cable (6), adjusting the position of the fixing table (7) to enable one side of the inner end of the fixing table to abut against the outer end of the hexagonal steel pipe (5), and fixedly connecting the fixing table (7) and a transverse loading table (11) through a third connecting bolt to match with the compression-pull load transferring unit (12) to axially position the hexagonal steel pipe (5);
step four: sleeving a pressure sensor (8) outside the exposed end of the anchor rod or the anchor cable (6) with a threaded section, and abutting against one side of the outer end of the fixed table (7), then connecting a fixed nut (9) outside the exposed end of the anchor rod or the anchor cable (6) in a threaded fit manner, and abutting one side of the inner end of the fixed nut against one side of the outer end of the pressure sensor (8); in the process, a fixed platform (7) arranged at one side of a pressure sensor (8) simulates a fixed supporting plate;
step five: fastening a fixing nut (9) through a torque wrench or a tension instrument to apply a pre-tightening force of a set value to the anchor rod or the anchor cable (6) so as to simulate the actual working state of the anchor rod or the anchor cable (6); assembling a wedge-shaped loading block (3) between the upper ends of the two pressure-pull load transferring units (12), and respectively attaching loading inclined planes (16) on two sides of the wedge-shaped loading block to the opposite surfaces of the guide inclined plates (14) in the two pressure-pull load transferring units (12);
step six: the method comprises the steps that a rock mechanics testing machine or a drop hammer impact testing machine is started to apply static and dynamic compression loads on the top of a wedge-shaped loading block (3), the wedge-shaped loading block (3) converts the static and dynamic compression loads P into a pair of symmetrical tensile loads T acting on the inner ends of two hexagonal steel pipes (5) through a pressing-pulling load transferring mechanism (2), and the stress deformation relation of an anchor rod or an anchor cable (6) in the drawing process can be obtained by recording the vertical pressure and the vertical displacement applied by the testing machine and combining the pressure value of a pressure sensor (8).
CN202111482543.8A 2021-12-07 2021-12-07 Dynamic and static drawing test device and method for anchor rod or anchor cable Pending CN114235573A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111482543.8A CN114235573A (en) 2021-12-07 2021-12-07 Dynamic and static drawing test device and method for anchor rod or anchor cable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111482543.8A CN114235573A (en) 2021-12-07 2021-12-07 Dynamic and static drawing test device and method for anchor rod or anchor cable

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114674686A (en) * 2022-05-26 2022-06-28 湖南大学 Pre-tensioning type impact test device and impact test method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114674686A (en) * 2022-05-26 2022-06-28 湖南大学 Pre-tensioning type impact test device and impact test method

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