CN109765114B - RPC cover plate test detection device and method - Google Patents
RPC cover plate test detection device and method Download PDFInfo
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- CN109765114B CN109765114B CN201910153023.9A CN201910153023A CN109765114B CN 109765114 B CN109765114 B CN 109765114B CN 201910153023 A CN201910153023 A CN 201910153023A CN 109765114 B CN109765114 B CN 109765114B
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- 238000001514 detection method Methods 0.000 title claims abstract description 39
- 238000012360 testing method Methods 0.000 title claims abstract description 30
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- 238000003825 pressing Methods 0.000 claims abstract description 64
- 230000007246 mechanism Effects 0.000 claims abstract description 38
- 238000002474 experimental method Methods 0.000 claims abstract description 15
- 238000005336 cracking Methods 0.000 claims abstract description 6
- 230000006835 compression Effects 0.000 claims description 21
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- 229910000831 Steel Inorganic materials 0.000 description 3
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- 239000000835 fiber Substances 0.000 description 2
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
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Abstract
The invention discloses an RPC cover plate test detection device and method, and relates to the technical field of detection. The invention comprises a base, a jack, a slide bar, a cross beam and a pressing plate; the base is vertically provided with a first upright post, a second upright post, a fourth upright post and a third upright post; a bearing plate is arranged among the first upright post, the second upright post, the fourth upright post and the third upright post; the bearing plate is parallel to the base; an experiment through hole is formed in the center of the bearing plate; the jacks are vertically arranged on the base, and the number of the cross beams is two; one end of a cross beam is fixedly connected with one end of the first upright post far away from the base, and the other end of the cross beam is fixedly connected with one end of the fourth upright post far away from the base; one end of the other cross beam is fixedly connected with one end of the second upright post far away from the base, and the other end of the other cross beam is fixedly connected with one end of the third upright post far away from the base; the beam is provided with a second graduated scale; the zero scale line of the second scale is positioned at the center of the cross beam; the cross beam is connected with the pressing plate through a telescopic mechanism. The invention is convenient for detecting the cracking load of the RPC cover plate.
Description
Technical Field
The invention belongs to the technical field of detection devices, and particularly relates to an RPC cover plate test detection device and method.
Background
Since the 90 th century, reactive powder concrete (Reactive Powder Concrete, international generic term RPC) has been developed, and has been used for engineering construction by gradually becoming the focus of research for students at home and abroad, because of its superior properties, the shortcomings of low strength, high brittleness and poor durability of conventional concrete have been overcome. In 3 months 2009, the department of railways in China has decided to adopt RPC to replace common concrete in the construction of all passenger dedicated lines to manufacture roadbed bridge cable duct cover plates and pavement footplates, thereby realizing the first large-scale application of the RPC cover plates in the world.
The test detection work has great influence on the engineering quality or structural performance, and the test detection can not only strictly control the quality of the raw materials for engineering, but also has great significance in accelerating the engineering construction progress and improving the engineering quality. In the case of the RPC cover plate, although the production process is mature, whether the cracking resistance and the bearing capacity of the finished product are qualified or not is determined by test detection. In the existing standards in China, the minimum limit value of the crack resistance bearing capacity of the cover plate is strictly regulated, specific requirements are also put forward on the detection method of the crack resistance and the bearing capacity of the cover plate, but no specific description is given to the equipment for test detection, so that inconvenience is brought to the test detection work of the RPC cover plate, and the working efficiency is greatly reduced.
Disclosure of Invention
The invention aims to provide an RPC cover plate test detection device and method, which solve the problems that the test detection of an RPC cover plate is inconvenient due to the fact that specific detection equipment is not available in the background art, and the efficiency of detecting the crack resistance and the bearing capacity of a worker in comparison with the cover plate is greatly reduced.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention provides an RPC cover plate test detection device, which comprises a base, a jack, a slide bar and a cross beam, wherein the base is provided with a plurality of jacks;
the base is rectangular; the base is vertically provided with a first upright post, a second upright post, a fourth upright post and a third upright post;
bearing plates are arranged among the first upright post, the second upright post, the fourth upright post and the third upright post; the bearing plate is parallel to the base; an experiment through hole is formed in the center of the bearing plate;
the jack is vertically arranged on the base, and the jack is opposite to the experimental through hole; a pressure sensor is arranged at one end of the jack, which is far away from the base; the pressure sensor is used for detecting the pressure between the jack and the RPC cover plate to be detected;
the number of the sliding rods is two; one end of the sliding rod is fixedly connected with one end of the first upright post far away from the base, and the other end of the sliding rod is fixedly connected with one end of the second upright post far away from the base; one end of the other sliding rod is fixedly connected with one end of the fourth upright post far away from the base, and the other end of the other sliding rod is fixedly connected with one end of the third upright post far away from the base; the two sliding rods are parallel to each other; the sliding rod is positioned above the bearing plate and is parallel to the bearing plate; the sliding rod is provided with a first graduated scale, and a zero graduated mark of the first graduated scale is positioned at the center of the sliding rod; two pressing plates are arranged on the sliding rod; the pressing plate is in sliding connection with the sliding rod, and is perpendicular to the sliding rod;
the number of the cross beams is two; one end of the cross beam is fixedly connected with one end of the first upright post far away from the base, and the other end of the cross beam is fixedly connected with one end of the fourth upright post far away from the base; one end of the other cross beam is fixedly connected with one end of the second upright post far away from the base, and the other end of the cross beam is fixedly connected with one end of the third upright post far away from the base; the beam is provided with a second graduated scale; the zero scale line of the second scale is positioned at the center of the cross beam;
the cross beam is connected with the pressing plate through a telescopic mechanism.
Preferably, the upper surface of the base is provided with a mounting groove; the bottom of the jack is slidably arranged in the mounting groove; a first positioning sliding block and a second positioning sliding block are further arranged in the mounting groove; the first positioning sliding block and the second positioning sliding block are respectively positioned at two sides of the jack; one side of the first positioning sliding block, which is far away from the jack, is fixedly connected with the inner side wall of the mounting groove through a spring; one side of the second positioning sliding block, which is far away from the jack, is fixedly connected with the side wall of the mounting groove through an adjusting bolt.
Preferably, the bearing plate is also provided with a scissor lifting mechanism; the number of the shear type lifting mechanisms is two, and the two shear type lifting mechanisms are respectively positioned at two sides of the experimental through hole; and one end of the scissor type lifting mechanism, which is far away from the bearing plate, is provided with a supporting plate.
Preferably, the bearing plate is provided with two mounting holes; the two mounting holes are respectively positioned at two sides of the experimental through hole; the two scissor lifting mechanisms are respectively arranged in the mounting holes.
Preferably, the telescopic mechanism is a hydraulic cylinder.
Preferably, a positioning plate is arranged on one side of the pressing plate away from the other pressing plate; the positioning plate is positioned at the bottom of the pressing plate; the upper edge of the positioning plate is rotationally connected with the pressing plate; the side surfaces of the positioning plates are connected with the pressing plates through spring buckles.
Preferably, the positioning plate is also provided with a retaining ring, and the retaining plate is provided with a hook matched with the retaining ring.
Preferably, the bottom of the base is provided with a roller; and the roller is provided with a wheel lock matched with the roller.
The invention also provides an RPC cover plate test detection device, which comprises a base, a first upright post, a second upright post, a fourth upright post, a third upright post, a bearing plate, a first compression bar and a second compression bar;
the first upright post, the second upright post, the fourth upright post and the third upright post are all vertically arranged and mounted on the upper surface of the base; the bearing plate is a rectangular plate and is fixedly connected with the first upright post, the second upright post, the fourth upright post and the third upright post respectively, the bearing plate is positioned above the base, and the bearing plate is parallel to the upper surface of the base;
one end of the first compression bar is fixedly connected with the first upright post, and the other end of the first compression bar is fixedly connected with the third upright post; one end of the second compression bar is fixedly connected with the second upright post, and the other end of the second compression bar is connected with the third upright post; the first compression bar and the second compression bar are both positioned at one side of the bearing plate far away from the base;
the first pressure rod and the second pressure rod are arranged in parallel, and the distance between the first pressure rod and the second pressure rod is smaller than the length of the RPC cover plate to be tested; the first pressing rod and the second pressing rod are arranged to be pressed at two ends of the upper side of the RPC cover plate to be tested;
the first upright post is provided with a first guide structure and a second guide structure, and the second upright post is provided with a second guide structure; the second upright post is provided with a third guide structure, and the fourth upright post is provided with a fourth guide structure; a fifth guide structure and a sixth guide structure are arranged on the third upright post; the first guide structure and the fifth guide structure are arranged oppositely, the third guide structure and the fourth guide structure are arranged oppositely, and the first guide structure, the third guide structure, the fourth guide structure and the fifth guide structure are matched mutually so as to realize the adjustment of the RPC cover plate to be tested in the width direction;
the second guide structure faces the second upright, and the sixth guide structure faces the fourth upright; the second guide structure and the sixth guide structure are arranged for adjusting the position of the RPC cover plate to be tested in the length direction;
a first gap is arranged between the lower part of the second guide structure and the bearing plate, and a second gap is arranged between the lower part of the sixth guide structure and the bearing plate; the first notch and the second notch are arranged for inserting an RPC cover plate to be detected;
the bearing plate is provided with an experiment through hole, and the experiment through hole is positioned at the bottom of the bearing plate; the base is provided with a jack, and a push rod of the jack is provided with a pressure sensor; the ejector rod of the jack is arranged to pass through the experimental through hole, so that the ejector rod of the jack is tightly propped against the center of the RPC cover plate to be detected.
The invention also provides an RPC cover plate test detection method, which comprises the following steps:
s1, horizontally arranging the front surface of an RPC cover plate downwards;
s2, arranging a pressure bar above the RPC cover plate so that the pressure bar can be abutted against the edge of the RPC cover plate from two ends of the RPC cover plate in the length direction;
s3, applying a vertical upward jacking force below the RPC cover plate by using a jack, and enabling a force applying point of the jacking force to be positioned at the center of the RPC cover plate;
s4, increasing the jacking force according to a certain loading rate, and detecting the pressure between the jack and the RPC cover plate in real time; and the jacking force is respectively 0, 0.5, 1.0, 1.2 and 2.0 times of equivalent concentrated load and kept for 3 minutes;
and S5, recording the jacking force as a cracking load when a first crack appears on the RPC cover plate.
The invention has the following beneficial effects:
the invention can rapidly finish the detection of the crack resistance and the bearing capacity of the RPC cover plate, improves the detection efficiency of the RPC cover plate, and makes up the blank that no specific RPC cover plate crack resistance and bearing capacity detection equipment exists in the market.
Of course, it is not necessary for any one product to practice the invention to achieve all of the advantages set forth above at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic overall structure of embodiment 1 of the present invention;
FIG. 2 is an isometric view of example 1 of the present invention when the jack is not assembled;
fig. 3 is an isometric view of a scissor lift mechanism according to embodiment 1 of the present invention;
FIG. 4 is a top view of embodiment 1 of the present invention;
FIG. 5 is an isometric view of example 2 of the present invention;
FIG. 6 is an isometric view of embodiment 2 of the present invention at a second viewing angle;
fig. 7 is an isometric view of embodiment 2 of the invention at a third perspective.
In the drawings, the list of components represented by the various numbers is as follows:
1-base, 2-jack, 3-slide bar, 4-crossbeam, 5-first stand, 6-second stand, 7-fourth stand, 8-third stand, 9-loading board, 901-experiment through-hole, 10-first scale, 11-clamp plate, 12-second scale, 13-telescopic mechanism, 101-mounting groove, 14-first positioning slider, 15-second positioning slider, 16-spring, 17-adjusting bolt, 18-scissor lift mechanism, 19-backup pad, 902-mounting hole, 20-locating board, 21-spring hasp, 22-buckle, 23-couple, 24-gyro wheel, 25-disc, 26-first V-shaped opening, 27-second V-shaped opening, 28-first clamp bar, 29-second clamp bar, 30-first guide structure, 31-second guide structure, 32-third guide structure, 33-fourth guide structure, 34-fifth guide structure, 35-sixth guide structure.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "upper", "upper surface", "one end", "the other end", "above", "vertical", "both sides", "inner", etc. indicate orientations or positional relationships, and are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Example 1
Referring to fig. 1-4, the invention discloses an RPC cover plate test detection device, which comprises a base 1, a jack 2, a slide rod 3 and a cross beam 4.
The base 1 is rectangular. The base 1 is vertically provided with a first upright 5, a second upright 6, a fourth upright 8 and a third upright 7. Specifically, the first upright 5, the second upright 6, the fourth upright 8 and the third upright 7 are vertically disposed at four corners of the base, and the first upright 5, the second upright 6, the fourth upright 8 and the third upright 7 are located on the upper surface of the base 1. It will be appreciated by those skilled in the art that the base 1 may be configured in a non-rectangular structure, and the first upright 5, the second upright 6, the fourth upright 8 and the third upright 7 may be disposed on the upper surface of the base 1, so that four connection points formed by the first upright 5, the second upright 6, the fourth upright 8 and the third upright 7 and the base 1 are respectively located at four vertices of a rectangle. The first upright 5, the second upright 6, the fourth upright 8 and the third upright 7 can be welded, can be connected by bolts or can be integrally formed with the base 1.
And a bearing plate 9 is arranged among the first upright 5, the second upright 6, the fourth upright 8 and the third upright 7. The carrying plate 9 is parallel to the base 1, specifically, the carrying plate 9 is parallel to the upper surface of the base 1. An experimental through hole 901 is formed in the center of the bearing plate 9. Specifically, the center line of the experimental through hole 901 passes through the center of a rectangle with the connection points of the first upright 5, the second upright 6, the fourth upright 8 and the third upright 7 and the base 1 as vertexes. The bearing plate 9 is used for supporting the RPC cover plate to be detected.
The jack 2 is vertically installed on the base 1, the jack 2 is placed on the upper surface of the base 1, the jack 2 is opposite to the experiment through hole 901, and when the jack is used, the ejector rod of the jack 2 passes through the experiment through hole 901. A pressure sensor is arranged at one end of the jack 2 far away from the base 1; the pressure sensor is used for detecting the pressure between the jack 2 and the RPC cover plate to be detected. And the RPC cover plate to be detected is jacked up by controlling the jack 2 until the RPC plate reaches a certain deformation, so that the maximum stress suffered by the RPC cover plate in the test process can be determined. Thereby achieving the purpose of detection. It will be appreciated by those skilled in the art that, in order to be able to intuitively see the stress between the RPC cover plate and the jack 2, a display member for displaying the pressure sensor value needs to be externally connected, which is possible for those skilled in the art, and will not be described here.
Specifically, two sliding rods 3 are arranged in parallel between the two sliding rods 3, and the two sliding rods 3 are parallel to the bearing table 9. One end of the sliding rod 3 is fixedly connected with one end of the first upright 5, which is far away from the base 1, and the other end of the sliding rod is fixedly connected with one end of the second upright 6, which is far away from the base 1. One end of the other sliding rod 3 is fixedly connected with one end of the fourth upright post 8, which is far away from the base 1, and the other end of the other sliding rod is fixedly connected with one end of the third upright post 7, which is far away from the base 1; the two slide bars 3 are parallel to each other. The sliding rod 3 is located above the bearing plate 9 and is parallel to the bearing plate 9. The sliding rod 3 is provided with a first graduated scale 10, a zero graduated scale line of the first graduated scale 10 is positioned at the center of the sliding rod 3, and graduations on the first graduated scale 10 are symmetrical about 0 graduations. Two pressing plates 11 are further arranged on the sliding rods 3, the pressing plates 11 are in sliding connection with the sliding rods 3, and the pressing plates 11 are perpendicular to the sliding rods 3. Specifically, the two pressing plates 11 are used to press the RPC cover plate from above at the time of detection.
The number of the cross beams 4 is two. One end of the cross beam 4 is fixedly connected with one end of the first upright 5, which is far away from the base 1, and the other end of the cross beam is fixedly connected with one end of the fourth upright 8, which is far away from the base 1; one end of the other cross beam 4 is fixedly connected with one end of the second upright post 6, which is far away from the base 1, and the other end of the other cross beam is fixedly connected with one end of the third upright post 7, which is far away from the base 1; the beam 4 is provided with a second graduated scale 12; the zero graduation line of the second graduation scale 12 is located at the center of the cross beam 4. In particular, the center lines of the two cross beams 4 and the center lines of the two sliding rods 3 may be located in the same plane, that is, a rectangular frame is formed between the two cross beams 4 and the two sliding rods 3.
The cross beam 4 is connected with the pressing plate 11 through a telescopic mechanism 13. Specifically, the beam 4 is connected to the platen 11 adjacent to the beam 4 by a telescopic mechanism 13. That is, the positions of the two pressing plates 11 and the distance between the two pressing plates 11 can be adjusted by controlling the two telescopic mechanisms 13. The telescopic mechanism 13 is conventional in the art, and one skilled in the art can select, set up and assemble the telescopic mechanism, for example, the telescopic mechanism can be realized by a hydraulic cylinder, a ball screw, a gear rack and the like.
In specific use, the jack 2 is placed on the upper surface of the base 1, and the RPC cover plate to be tested is placed on the bearing plate 9. And the position of the jack 2 is adjusted, so that the center line of the ejector rod of the jack 2 coincides with the center line of the experimental through hole 901, and when the experimental through hole is implemented, the distance between the ejector rod of the jack 2 and the inner wall of the experimental through hole 901 is observed to be uniform. The position of the RPC cover plate is adjusted to ensure that the RPC cover plate to be detected cannot interfere with the first upright 5, the second upright 6, the fourth upright 8 or the third upright 7 in the detection process. That is, by adjusting the position of the RPC cover plate, the jack rod of the jack 2 can be aligned substantially to the middle of the RPC cover plate.
By means of the telescopic mechanism 13, the positions of the two pressing plates 11 are adjusted, so that the distance between the two pressing plates 11 (here, the distance between the outer sides of the two pressing plates 11, that is, the distance from one side of the pressing plate 11 away from the other pressing plate 11 to the side of the other pressing plate 11 away from the pressing plate 11) is substantially equal to the length of the RPC cover plate, or may be slightly greater than the length of the RPC cover plate, but it is ensured that both pressing plates 11 can abut against both ends of the upper side of the RPC cover plate.
And controlling the jack 2 to jack up, pushing the RPC cover plate to be detected to move upwards through the jack 2, and adjusting the position of the RPC cover plate to be detected in the width direction when the RPC cover plate moves to be in contact with the pressing plate 11, so that the scales on the second graduated scale 12 corresponding to the long side of the RPC cover plate to be detected are equal to the central line of the zero scales on the second graduated scale 12.
The control jack 2 is continuously arranged to jack up, so that the two ends of the RPC cover plate are abutted against the pressing plate 12. The jack-up of the jack 2 is continuously controlled, so that the detection of RPC stress is realized.
As a preferable mode, the upper surface of the base 1 is provided with a mounting groove 101, specifically, the mounting groove 101 is a rectangular groove, and the center line of the rectangular groove and the center line of the experimental through hole 901 are located on the same straight line. The bottom of the jack 2 is slidably arranged in the mounting groove 101; the mounting groove 101 is also internally provided with a first positioning slide block 14 and a second positioning slide block 15, and the first positioning slide block 14 and the second positioning slide block 15 are respectively positioned at two sides of the jack 2. One side of the first positioning slide block 14, which is far away from the jack 2, is fixedly connected with the inner side wall of the mounting groove 101 through a spring 16; the side of the second positioning slide block 15, which is far away from the jack 2, is fixedly connected with the side wall of the mounting groove 101 through an adjusting bolt 17. In this way, the position of the jack 2 can be adjusted through the adjusting bolt 17, so that the center line of the ejector rod of the jack 2 can be conveniently adjusted to a position coinciding with the center line of the experimental through hole 901.
As an implementation manner, a disc 25 is arranged at the bottom of the jack 2, the central line of the ejector rod of the jack 2 coincides with the central line of the disc 25, and the diameter of the disc 25 is larger than the outer diameter of the jack 2. The first positioning slider 14 has two first sliding surfaces parallel to each other and slidably connected to two inner walls of the mounting groove 101 parallel to each other. A first inclined plane and a second inclined plane on one side of the first positioning sliding block 14, which is close to the jack 2, wherein the first inclined plane and the second inclined plane are matched to form a first V-shaped opening 26, and the angular bisector of the first V-shaped opening 26 is equal to the distance between the two first sliding surfaces; the second positioning slider 15 has two second sliding surfaces parallel to each other and slidably connected to two inner walls of the mounting groove 101 parallel to each other. The second positioning slide block 15 is close to a third inclined plane and a fourth inclined plane on one side of the jack 2, the third inclined plane and the fourth inclined plane are matched to form a second V-shaped opening 27, and the distances from the angular bisector of the second V-shaped opening 27 to the two second sliding surfaces are equal. The first V-shaped opening 26 is opposite to the second V-shaped opening 27, and the first inclined surface, the second inclined surface, the third inclined surface and the fourth inclined surface are tangential to the disc 25. Specifically, the number of springs 16 is two, the number of the adjusting bolts 17 is one, a part of the corners of the first V-shaped openings 26 and the angular bisector of the second V-shaped openings 27 are positioned on the same straight line, and the center line of the adjusting bolts 17 and the angular bisector of the first V-shaped openings 26 are positioned on the same straight line. The angle of the first V-shaped opening 26 and the angle of the second V-shaped opening 27 are both 100-120 degrees.
As a preferable mode, the bearing plate 9 is also provided with a scissor lifting mechanism 18; the number of the shear type lifting mechanisms 18 is two, and the two shear type lifting mechanisms 18 are respectively positioned at two sides of the experiment through hole 901; the end of the scissor lift mechanism 18 remote from the carrier plate 9 is provided with a support plate 19. Specifically, the scissor lift mechanism 18 is of the prior art, and the specific structure thereof will not be described herein, and those skilled in the art will understand that the lifting of the scissor lift mechanism 18 requires power, and is typically a hydraulic cylinder, and those skilled in the art will also be able to provide a hydraulic system for the same. The two scissor lifting mechanisms 18 are used for lifting the RPC cover plate on the bearing plate 9 to the bottom close to the pressing plate 11, so that stable lifting of the RPC cover plate can be ensured.
Optionally, two mounting holes 902 are formed on the bearing plate 9; the two mounting holes 902 are respectively positioned at two sides of the experimental through hole 901; two scissor lifts 18 are mounted in the mounting holes 902, respectively. In the non-lifting state, the scissor lift mechanism 18 can be retracted into the mounting hole 902, specifically, the mounting hole 902 may be a groove or a counter bore, so that in the non-lifting state, the scissor lift mechanism 18 is retracted into the corresponding mounting hole 902, so that the RPC cover plate is placed on the carrier plate 9, and interference with the scissor lift mechanism 18 during the placement of the RPC cover plate can be prevented.
Optionally, a positioning plate 20 is mounted on a side of the pressing plate 11 away from the other pressing plate 11; the positioning plate 20 is positioned at the bottom of the pressing plate 11; the upper edge of the positioning plate 20 is rotationally connected with the pressing plate 11; the side surfaces of the positioning plate 20 are connected with the pressing plate 11 through spring buckles 21. The positioning plate 20 has two states, in the first state, the positioning plate 20 is turned over to the side of the corresponding pressing plate 11 far away from the other positioning plate 20; in the second state, the positioning plate 20 is turned to the vertical state, and at this time, the bottom surface of the positioning plate 20 protrudes from the lower surface of the pressing plate 11. In specific implementation, the RPC cover plate to be detected is pushed to move upwards by the jack 2, when the RPC cover plate moves to be in contact with the pressing plate 11, the position of the RPC cover plate to be detected in the width direction is adjusted so that the scales on the second graduated scale 12 corresponding to the long side of the RPC cover plate to be detected are equal to the center line of the zero scale on the second graduated scale 12, then the pressing plate 11 is pushed to move towards the RPC cover plate to be detected by the telescopic mechanism 13, when the positioning plate 20 is exposed and abuts against the end part of the RPC cover plate to be detected with the side surface of the lower part of the pressing plate 11, at the moment, the pressing plate 11 is just located right above the two ends of the RPC cover plate to be detected, and when the jack 2 continues to push the RPC to be detected upwards, the two pressing plates 11 are just pressed at the two ends of the RPC to be detected.
Further, the positioning plate 20 is further provided with a retaining ring 22, and the pressing plate 11 is provided with a hook 23 matched with the retaining ring 22. Therefore, when the pressing plate 11 is propped against the two ends of the RPC to be detected, the positioning plate 20 is folded and folded, and the friction between the positioning plate 20 and the RPC to be detected is avoided to influence the detection precision.
Optionally, a roller 24 is arranged at the bottom of the base 1; the roller 24 is provided with a wheel lock matched with the roller 24. In this way, the movement and locking of the present invention are facilitated, and in particular, a person skilled in the art can choose the corresponding wheel lock or brake mechanism from the prior art as required, which is not described in detail herein.
Example 2
Referring to fig. 5-7, the invention further provides an RPC cover plate test detection device, which comprises a base 1, a first upright 5, a second upright 6, a fourth upright 8, a third upright 7, a bearing plate 9, a first compression bar 28 and a second compression bar 29.
The first upright 5, the second upright 6, the fourth upright 8 and the third upright 7 are all vertically arranged and mounted on the upper surface of the base 1; the bearing plate 9 is a rectangular plate, the bearing plate 9 is respectively fixedly connected with the first upright 5, the second upright 6, the fourth upright 8 and the third upright 7, the bearing plate 9 is positioned above the base 1, and the bearing plate 9 is parallel to the upper surface of the base 1.
One end of the first compression bar 28 is fixedly connected with the first upright 5, and the other end is fixedly connected with the third upright 7; one end of the second pressing rod 29 is fixedly connected with the second upright post 6, and the other end is connected with the fourth upright post 8; the first pressing rod 28 and the second pressing rod 29 are both located at a side of the bearing plate 9 away from the base 1.
The first pressing rod 28 and the second pressing rod 29 are arranged in parallel, and the distance between the first pressing rod 28 and the second pressing rod 29 is smaller than the length of the RPC cover plate to be tested. In this way, it is ensured that the first compression bar 28 and the second compression bar 29 are respectively compressed at both ends of the RPC cover plate. The first pressing bar 28 and the second pressing bar 29 are provided for pressing both ends of the upper side of the RPC cover to be tested.
The first upright 5 is provided with a first guide structure 30 and a second guide structure 31, and the second upright 6 is provided with a second guide structure 31. The second upright 6 is provided with a third guide structure 32, and the fourth upright 8 is provided with a fourth guide structure 33; a fifth guide structure 34 and a sixth guide structure 35 are arranged on the third upright post 7; the first guiding structure 30 is disposed opposite to the fifth guiding structure 34, the third guiding structure 32 is disposed opposite to the fourth guiding structure 33, and the first guiding structure 30, the third guiding structure 32, the fourth guiding structure 33 and the fifth guiding structure 34 are mutually matched to realize adjustment of the RPC cover plate to be tested in the width direction. In particular, as a possible manner, the first guide structure 30, the third guide structure 32, the fourth guide structure 33 and the fifth guide structure 34 each have an inclined surface, and the distance between the inclined surfaces of the first guide structure 30 and the fifth guide structure 34 gradually decreases from bottom to top. The distance between the inclined surface of the third guide structure 32 and the inclined surface of the fourth guide structure 33 is gradually reduced in the direction from bottom to top. Thus, the two ends of the two RPC cover plates can be respectively adjusted, and the ejector rod of the jack 2 can be propped against the center of the width direction of the RPC cover plates.
The second guide structure 31 is directed towards the second upright 6 and the sixth guide structure 35 is directed towards the fourth upright 8. The second guide structure 31 and the sixth guide structure 35 are provided for adjusting the position of the RPC cover plate to be measured in the length direction thereof. In this way, it can be ensured that the ejector rod of the jack 2 is pushed against the center of the RPC cover plate in the length direction by the adjustment in the length direction. Further, in order to prevent the RPC cover plate from interfering during the testing process, a first avoidance groove is formed at one end of the first guide structure 30, the second guide structure 31, the fifth guide structure 34 and the sixth guide structure, which is close to the first compression bar 28, and the size of the first avoidance groove in the vertical direction is slightly larger than the thickness of the RPC cover plate. And a second avoidance groove is formed at one end, close to the second compression bar 29, of the third guide structure 32 and the fourth guide structure 33, and the dimension of the second avoidance groove in the vertical direction is slightly larger than the thickness of the RPC cover plate. In order to facilitate the placement of the RPC cover plate onto the carrier plate 9, said carrier plate 9 protrudes from said first and third uprights 5, 7.
A first gap is arranged between the lower part of the second guiding structure 31 and the bearing plate 9, and a second gap is arranged between the lower part of the sixth guiding structure 35 and the bearing plate 9; the first notch and the second notch are configured for insertion into an RPC cover plate to be tested. In this way, by providing the notch, it is possible to be convenient to place the RPC cover plate on the carrier plate 9, specifically, the size of the first notch in the vertical direction and the size of the second notch in the vertical direction are both greater than the thickness of the RPC cover plate.
An experiment through hole 901 is formed in the bearing plate 9, and the experiment through hole 901 is located at the bottom of the bearing plate 9; a jack 2 is arranged on the base 1, and a pressure sensor is arranged on a push rod of the jack 2; the ejector rod of the jack 2 is arranged to pass through the experimental through hole 901 so that the ejector rod of the jack 2 is abutted against the center of the RPC cover plate to be detected.
It will be understood by those skilled in the art that the arrangement and adjustment structure of the jack 2 in embodiment 1 of the present disclosure may be applied to the present embodiment, and the scissor lift mechanism 18 and the mounting structure thereof in embodiment 1 of the present disclosure may be applied to the present embodiment, which is not described herein.
Example 3
The invention also provides an RPC cover plate test detection method, which comprises the following steps:
s1, horizontally arranging the front surface of an RPC cover plate downwards;
s2, arranging a pressure bar above the RPC cover plate so that the pressure bar can be abutted against the edge of the RPC cover plate from two ends of the RPC cover plate in the length direction;
s3, applying a vertical upward jacking force below the RPC cover plate by using a jack, and enabling a force applying point of the jacking force to be positioned at the center of the RPC cover plate;
s4, increasing the jacking force according to a certain loading rate, and detecting the pressure between the jack and the RPC cover plate in real time; and the jacking force is respectively 0, 0.5, 1.0, 1.2 and 2.0 times of equivalent concentrated load and kept for 3 minutes;
and S5, recording the jacking force as a cracking load when a first crack appears on the RPC cover plate.
Through the steps, the cracking load of the RPC cover plate is conveniently detected, and meanwhile, the stress conditions of the elastic stage, the yielding stage and the breaking stage of the RPC cover plate can be measured according to the requirements.
The failure process of the RPC cover plate in the test detection can be roughly divided into three stages of elasticity-yield-failure, and each stage shows different failure rules.
Elastic stage: the RPC cover plate, after a period of time after the start of the stress, undergoes an elastic phase in which the load is linearly related to the strain, in which the strain increases in a linear proportion with the increase of the load. When the ultimate elastic strain is reached, a first macroscopic crack appears in the bottom of the RPC cover plate, and the load at this time is referred to as the crack load.
Yield stage: when the bottom of the RPC cover plate is cracked, the damage process of the RPC cover plate immediately enters a yield stage along with the continuous increase of load. In this phase the rate of increase of strain is much greater than the rate of increase of load, rather than the linear relationship of the elastic phase. The yield stage of the RPC cover plate is obviously different from the brittle failure process of common concrete due to the existence of steel fibers, and is very similar to that of steel, and the RPC cover plate also has excellent toughness. When the load is increased to the limit load, the RPC cover plate loses the bearing capacity, and the yielding stage is finished.
And (3) a destruction stage: in the failure stage, the tail ends of the steel fibers are separated from the RPC cover plate, and the RPC cover plate is cracked seriously so as to not work normally, so that the RPC cover plate is continuously cracked without increasing load.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (9)
1. The RPC cover plate test detection device is characterized by comprising a base (1), a jack (2), a slide bar (3) and a cross beam (4);
the base (1) is rectangular; a first upright post (5), a second upright post (6), a fourth upright post (8) and a third upright post (7) are vertically arranged on the base (1);
a bearing plate (9) is arranged among the first upright post (5), the second upright post (6), the fourth upright post (8) and the third upright post (7); the bearing plate (9) is parallel to the base (1); an experiment through hole (901) is formed in the center of the bearing plate (9);
the jack (2) is vertically arranged on the base (1), and the jack (2) is opposite to the experiment through hole (901); a pressure sensor is arranged at one end of the jack (2) far away from the base (1); the pressure sensor is used for detecting the pressure between the jack (2) and the RPC cover plate to be detected;
the number of the sliding rods (3) is two; one end of one sliding rod (3) is fixedly connected with one end of the first upright post (5) far away from the base (1), and the other end of the sliding rod is fixedly connected with one end of the second upright post (6) far away from the base (1); one end of the other sliding rod (3) is fixedly connected with one end of the fourth upright post (8) far away from the base (1), and the other end of the other sliding rod is fixedly connected with one end of the third upright post (7) far away from the base (1); the two sliding rods (3) are parallel to each other; the sliding rod (3) is positioned above the bearing plate (9) and is parallel to the bearing plate (9); the sliding rod (3) is provided with a first graduated scale (10), and a zero graduated scale line of the first graduated scale (10) is positioned at the center of the sliding rod (3); two pressing plates (11) are further arranged on the sliding rod (3); the pressing plate (11) is in sliding connection with the sliding rod (3), and the pressing plate (11) is perpendicular to the sliding rod (3);
the number of the cross beams (4) is two; one end of the cross beam (4) is fixedly connected with one end of the first upright post (5) far away from the base (1), and the other end of the cross beam is fixedly connected with one end of the fourth upright post (8) far away from the base (1); one end of the other cross beam (4) is fixedly connected with one end of the second upright post (6) far away from the base (1), and the other end of the cross beam is fixedly connected with one end of the third upright post (7) far away from the base (1); a second graduated scale (12) is arranged on the cross beam (4); the zero graduation line of the second graduated scale (12) is positioned at the center of the cross beam (4);
the cross beam (4) is connected with the pressing plate (11) through a telescopic mechanism (13);
the upper surface of the base (1) is provided with a mounting groove (101); the bottom of the jack (2) is slidably arranged in the mounting groove (101); a first positioning sliding block (14) and a second positioning sliding block (15) are further arranged in the mounting groove (101); the first positioning sliding block (14) and the second positioning sliding block (15) are respectively positioned at two sides of the jack (2); one side of the first positioning sliding block (14) far away from the jack (2) is fixedly connected with the inner side wall of the mounting groove (101) through a spring (16); one side of the second positioning sliding block (15) far away from the jack (2) is fixedly connected with the side wall of the mounting groove (101) through an adjusting bolt (17);
the bottom of the jack (2) is provided with a disc (25), the center line of the ejector rod of the jack (2) is coincident with the center line of the disc (25), the diameter of the disc (25) is larger than the outer diameter of the jack (2), and the first positioning sliding block (14) is provided with two first sliding surfaces which are parallel to each other and are in sliding connection with two inner walls of the mounting groove (101) which are parallel to each other; a first inclined plane and a second inclined plane on one side, close to the jack (2), of the first positioning sliding block (14) are matched to form a first V-shaped opening (26), and the distance from the angular bisector of the first V-shaped opening (26) to the two first sliding surfaces is equal; the second positioning slide block (15) is provided with two second sliding surfaces which are parallel to each other and are in sliding connection with two inner walls of the mounting groove (101) which are parallel to each other, the second positioning slide block (15) is close to a third inclined surface and a fourth inclined surface on one side of the jack (2), the third inclined surface and the fourth inclined surface are matched to form a second V-shaped opening (27), the distance from an angular bisector of the second V-shaped opening (27) to the two second sliding surfaces is equal, the first V-shaped opening (26) is opposite to the second V-shaped opening (27), and the first inclined surface, the second inclined surface, the third inclined surface and the fourth inclined surface are tangential to the disc (25).
2. The RPC cover plate test detection device according to claim 1, wherein the bearing plate (9) is further provided with a scissor-type lifting mechanism (18); the number of the shear type lifting mechanisms (18) is two, and the two shear type lifting mechanisms (18) are respectively positioned at two sides of the experiment through hole (901); one end of the scissor type lifting mechanism (18) far away from the bearing plate (9) is provided with a supporting plate (19).
3. The RPC cover plate test detection device according to claim 2, wherein two mounting holes (902) are formed in the carrier plate (9); the two mounting holes (902) are respectively positioned at two sides of the experimental through hole (901); the two scissor lifting mechanisms (18) are respectively arranged in the mounting holes (902).
4. The RPC cover plate test detection device according to claim 1, wherein the telescopic mechanism (13) is a hydraulic cylinder.
5. The RPC cover plate test detection device according to claim 1, wherein a positioning plate (20) is mounted on a side of the pressing plate (11) away from the other pressing plate (11); the positioning plate (20) is positioned at the bottom of the pressing plate (11); the upper edge of the positioning plate (20) is rotationally connected with the pressing plate (11); the side surfaces of the positioning plates (20) are connected with the pressing plate (11) through spring buckles (21).
6. The RPC cover plate test detection device according to claim 5, wherein the positioning plate (20) is further provided with a retaining ring (22), and the pressing plate (11) is provided with a hook (23) matched with the retaining ring (22).
7. The RPC cover plate test detection device according to claim 1, wherein a roller (24) is provided at the bottom of the base (1); the roller (24) is provided with a wheel lock matched with the roller (24).
8. The RPC cover plate test detection device is characterized by comprising a base (1), a first upright post (5), a second upright post (6), a fourth upright post (8), a third upright post (7), a bearing plate (9), a first compression bar (28) and a second compression bar (29);
the first upright post (5), the second upright post (6), the fourth upright post (8) and the third upright post (7) are vertically arranged and mounted on the upper surface of the base (1); the bearing plate (9) is a rectangular plate, the bearing plate (9) is fixedly connected with the first upright post (5), the second upright post (6), the fourth upright post (8) and the third upright post (7) respectively, the bearing plate (9) is positioned above the base (1), and the bearing plate (9) is parallel to the upper surface of the base (1);
one end of the first compression bar (28) is fixedly connected with the first upright post (5), and the other end of the first compression bar is fixedly connected with the third upright post (7); one end of the second compression bar (29) is fixedly connected with the second upright post (6), and the other end of the second compression bar is connected with the fourth upright post (8); the first pressure lever (28) and the second pressure lever (29) are both positioned on one side of the bearing plate (9) far away from the base (1);
the first pressure rod (28) and the second pressure rod (29) are arranged in parallel, and the distance between the first pressure rod (28) and the second pressure rod (29) is smaller than the length of the RPC cover plate to be tested; the first pressure lever (28) and the second pressure lever (29) are arranged to be pressed against both ends of the upper side of the RPC cover plate to be tested;
a first guide structure (30) and a second guide structure (31) are arranged on the first upright post (5); a third guide structure (32) is arranged on the second upright (6), and a fourth guide structure (33) is arranged on the fourth upright (8); a fifth guide structure (34) and a sixth guide structure (35) are arranged on the third upright post (7); the first guide structure (30) is arranged opposite to the fifth guide structure (34), the third guide structure (32) is arranged opposite to the fourth guide structure (33), and the first guide structure (30), the third guide structure (32), the fourth guide structure (33) and the fifth guide structure (34) are mutually matched to realize the adjustment of the RPC cover plate to be tested in the width direction;
-the second guiding structure (31) is directed towards the second upright (6), the sixth guiding structure (35) is directed towards the fourth upright (8); the second guide structure (31) and the sixth guide structure (35) are arranged for adjusting the position of the RPC cover plate to be tested in the length direction;
a first gap is arranged between the lower part of the second guide structure (31) and the bearing plate (9), and a second gap is arranged between the lower part of the sixth guide structure (35) and the bearing plate (9); the first notch and the second notch are arranged for inserting an RPC cover plate to be detected;
an experiment through hole (901) is formed in the bearing plate (9), and the experiment through hole (901) is located at the bottom of the bearing plate (9); a jack (2) is arranged on the base (1), and a pressure sensor is arranged on a push rod of the jack (2); the ejector rod of the jack (2) is arranged to pass through the experimental through hole (901) so as to enable the ejector rod of the jack (2) to be tightly pressed at the center of the RPC cover plate to be detected;
the first upright (5) is provided with a first guide structure (30) and a second guide structure (31), the second upright (6) is provided with a third guide structure (32), and the fourth upright (8) is provided with a fourth guide structure (33); a fifth guide structure (34) and a sixth guide structure (35) are arranged on the third upright post (7); the first guide structure (30) is arranged opposite to the fifth guide structure (34), the third guide structure (32) is arranged opposite to the fourth guide structure (33), and the first guide structure (30), the third guide structure (32), the fourth guide structure (33) and the fifth guide structure (34) are mutually matched to realize the adjustment of the RPC cover plate to be tested in the width direction; -the second guiding structure (31) is directed towards the second upright (6), the sixth guiding structure (35) is directed towards the fourth upright (8); the second guide structure (31) and the sixth guide structure (35) are arranged for adjusting the position of the RPC cover plate to be tested in the length direction thereof.
9. An RPC cover test detection method for an RPC cover test detection device according to any one of claims 1-8, comprising the steps of:
s1, horizontally arranging the front surface of an RPC cover plate downwards;
s2, arranging a pressure bar above the RPC cover plate so that the pressure bar can be abutted against the edge of the RPC cover plate from two ends of the RPC cover plate in the length direction;
s3, applying a vertical upward jacking force below the RPC cover plate by using a jack, and enabling a force applying point of the jacking force to be positioned at the center of the RPC cover plate;
s4, increasing the jacking force according to a certain loading rate, and detecting the pressure between the jack and the RPC cover plate in real time; and the jacking force is respectively 0, 0.5, 1.0, 1.2 and 2.0 times of equivalent concentrated load and kept for 3 minutes;
and S5, recording the jacking force as a cracking load when a first crack appears on the RPC cover plate.
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| CN110646295B (en) * | 2019-10-25 | 2022-03-18 | 中铁九局集团工程检测试验有限公司 | Anti bearing capacity detection device that splits of detachable RPC apron |
| CN112557637B (en) * | 2020-11-30 | 2024-03-26 | 广信检测认证集团有限公司 | Active powder concrete apron detection device |
| CN114813353B (en) * | 2022-05-25 | 2022-12-20 | 浙江意诚检测有限公司 | Detection equipment with building steel bar detection structure and application method thereof |
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