CN114878307A - Testing device for erosion abrasion of gap between ballastless track concrete layers - Google Patents
Testing device for erosion abrasion of gap between ballastless track concrete layers Download PDFInfo
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- CN114878307A CN114878307A CN202210510992.7A CN202210510992A CN114878307A CN 114878307 A CN114878307 A CN 114878307A CN 202210510992 A CN202210510992 A CN 202210510992A CN 114878307 A CN114878307 A CN 114878307A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
- G01N3/567—Investigating resistance to wear or abrasion by submitting the specimen to the action of a fluid or of a fluidised material, e.g. cavitation, jet abrasion
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
Abstract
The invention relates to the technical field of railway tracks, in particular to a device for testing erosion abrasion of an open seam between concrete layers of a ballastless track, which comprises an assembled mechanism, a first concrete plate test piece, a second concrete plate test piece, a prefabricated water tank, a first connecting piece, a second connecting piece, an elastic sealing piece and a high-frequency loading device, wherein the assembled mechanism is arranged on the assembled mechanism; the assembly type structure is connected with the bottom in the prefabricated water tank, a first concrete slab test piece is installed on the assembly type structure through a first connecting piece, a second concrete slab test piece is installed on the assembly type structure through a second connecting piece, an interlayer separation seam is formed in a gap between the first concrete slab test piece and the second concrete slab test piece, a rear side opening, a left side opening and a right side opening of the interlayer separation seam are all plugged through elastic sealing pieces, and the high-frequency loading device is installed at the top of the assembly type structure. The device can adjust the height of the interlayer separation joint, and after the test is finished, the concrete test piece can be conveniently detached and the change of the concrete test piece can be observed, so that the erosion abrasion condition of the concrete test piece can be tested.
Description
Technical Field
The invention relates to the technical field of railway tracks, in particular to a device for testing erosion and abrasion of an open joint between concrete layers of a ballastless track.
Background
The ballastless track greatly changes the national travel mode and powerfully promotes the economic development. Due to improper construction and maintenance modes, a large number of cracks may appear inside or between layers of the ballastless track structure. In a water environment and a drainage unsmooth section, a large amount of water can permeate into a track structure along an interlayer gap, certain pressure and speed can be generated under the action of train load, the pressure of hydrodynamic water can generate a pulling and pressing action on concrete fine particles on the surface of the gap, the speed of water flow can generate a shearing action, and when the action destroys the coupling force between the surface fine particles and a matrix, the fine particles can be separated from the matrix and are discharged along with the flowing of water, and a slurry bleeding phenomenon is formed at a crack outlet. The particles in the water flow collide with concrete on the surface of the open joint at a certain angle and speed, so that erosion and abrasion are further generated, more concrete particles are separated from the matrix, the height of the open joint is gradually increased, the diseases such as the hollowing of a track plate or a base plate are developed, and the safety and the stability of driving are seriously influenced.
In order to evaluate the concrete damage state of the ballastless track, an erosion experiment of an isolated joint between concrete layers of the ballastless track is often required to be carried out, and the tool adopted in the current test cannot be detached and observed to test the erosion wear degree of a concrete test piece after the test is finished, so that great inconvenience is brought to the experiment.
Disclosure of Invention
The invention aims to provide a device for testing erosion abrasion of a gap between ballastless track concrete layers, which can be used for conveniently disassembling a concrete slab test piece and observing the change of the tested concrete test piece so as to test the erosion abrasion condition of the concrete test piece.
The technical scheme of the invention is realized as follows:
a device for testing erosion abrasion of a gap between ballastless track concrete layers comprises an assembled mechanism, a first concrete slab test piece, a second concrete slab test piece, a prefabricated water tank, a first connecting piece, a second connecting piece, an elastic sealing piece and a high-frequency loading device;
the assembly type mechanism is arranged at the bottom in the precast water tank, the first concrete plate test piece is installed on the assembly type mechanism through a first connecting piece, the second concrete plate test piece is installed on the assembly type mechanism through a second connecting piece, the first concrete plate test piece and the second concrete plate test piece are parallel to each other and are arranged correspondingly, a gap between the first concrete plate test piece and the second concrete plate test piece forms the interlayer separation seam, and the interlayer separation seam comprises a front side opening, a rear side opening, a left side opening and a right side opening;
the high-frequency loading device is arranged at the top of the assembly type mechanism, and the rear side opening, the left side opening and the right side opening are all plugged by the elastic sealing piece.
Further, the height of the interlayer separation seam can be changed by adjusting the first connecting piece and/or the second connecting piece.
Furthermore, the assembly type mechanism comprises an upper mounting plate, a lower mounting plate and a supporting mechanism, the upper mounting plate and the lower mounting plate are parallel to each other, the upper mounting plate is arranged right above the lower mounting plate, and the supporting mechanism is arranged between the upper mounting plate and the lower mounting plate;
the first concrete plate test piece is mounted at the bottom of the upper mounting plate, and the second concrete plate test piece is mounted at the top of the lower mounting plate.
Furthermore, the top of the upper mounting plate is also provided with a mounting plate, and the high-frequency loading device is arranged on the mounting plate.
Further, the supporting mechanism comprises a supporting piece, the upper mounting plate is fixedly connected with the lower mounting plate through the supporting piece, and the supporting piece is arranged on one side close to the rear side opening.
Furthermore, the supporting mechanism further comprises a reinforcing rib, one end of the reinforcing rib is connected with the lower mounting plate, and the other end of the reinforcing rib is connected with the upper mounting plate or the upper part of the supporting piece.
Further, the first connecting piece comprises a first embedded bolt and a first nut which are matched with each other, and the head of the first embedded bolt is embedded in the first concrete slab test piece.
Furthermore, the first connecting piece further comprises a first gasket, and the first gasket is sleeved on the screw rod of the first embedded bolt.
Further, the second connecting piece comprises a second embedded bolt and a second nut which are matched with each other, and the head of the second embedded bolt is embedded in the second concrete slab test piece.
Further, the second connecting piece further comprises a second gasket, and the second gasket is sleeved on the screw rod of the second embedded bolt.
Further, the testing device also comprises a third connecting piece, and the lower mounting plate is connected with the prefabricated water tank through the third connecting piece.
Further, the third connecting piece comprises a third embedded bolt and a third nut which are matched with each other, and the head of the third embedded bolt is embedded in the bottom of the prefabricated water tank.
Furthermore, the testing device also comprises a cushion block, and the cushion block is arranged between the inner bottom surface of the prefabricated water tank and the lower mounting plate.
Furthermore, a reserved gap is formed in the side face of the upper mounting plate, and the reserved gap can enable a screw of the first embedded bolt to penetrate through;
or a reserved gap is formed in the side surface of the lower mounting plate, and the reserved gap can enable the screw of the second embedded bolt to penetrate through;
or, the side of going up the mounting panel with the side of mounting panel has all seted up the reservation breach down, the reservation breach of going up the mounting panel side can make first buried bolt's screw rod passes, the reservation breach of mounting panel side can make down the buried bolt's of second screw rod passes.
Further, the first connecting piece, the second connecting piece and the third connecting piece are all provided with a plurality of.
Further, the elastic sealing piece is made of waterproof glue.
Further, the whole assembled mechanism is made of steel.
Compared with the prior art, the invention has the beneficial effects that:
the first concrete slab test piece and the second concrete slab test piece can be flexibly installed on the fabricated mechanism, and after the test is finished, the first concrete slab test piece and the second concrete slab test piece can be conveniently detached and the change of the first concrete slab test piece and the second concrete slab test piece can be clearly observed and tested, so that the erosion abrasion condition of the concrete test piece can be obtained through the test.
Further, this application is through adjusting first connecting piece and/or second connecting piece can change the height of bed separation seam can be through the control variable method to through the height that changes bed separation seam, the multiple measurement contrasts, can obtain the influence of the high difference of bed separation seam to concrete sample erosion wear, improves measurement.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic view of the overall structure of a test apparatus in embodiment 1 of the present invention;
FIG. 2 is a schematic side view of the assembled mechanism according to embodiment 1 of the present invention;
FIG. 3 is a schematic top view of the fabricated structure in accordance with embodiment 1 of the present invention;
fig. 4 is a front view schematically showing the structure of the fabricated mechanism in embodiment 1 of the present invention.
In the figure:
2-placing a plate; 3-mounting the plate; 4-lower mounting plate; 5-reinforcing ribs; 6-a support member; 9-a first concrete slab test piece; 10-a second concrete slab test piece; 11-a high frequency loading device; 111-a first embedded bolt; 112-a first nut; 12-prefabricating a water tank; 13-cushion block; 141-a third embedded bolt; 142-a third nut; 151-second embedded bolts; 152-second nut.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
Example 1
Referring to fig. 1 to 4, the present embodiment provides a technical solution, as follows:
a device for testing erosion abrasion of a separation seam between ballastless track concrete layers comprises an assembly type mechanism, a first concrete slab test piece 9, a second concrete slab test piece 10, a prefabricated water tank 12, a first connecting piece, a second connecting piece, an elastic sealing piece and a high-frequency loading device 11, wherein the first concrete slab test piece 9 and the second concrete slab test piece 10 are preferably arranged to be regular rectangular plate-shaped structures and serve as test pieces.
In order to simulate the actual scene, the prefabricated water tank 12 is formed by welding steel plates, and water can be filled into the prefabricated water tank 12. The assembly type mechanism is arranged at the bottom of a cavity inside the precast water tank 12, the assembly type mechanism is connected with the precast water tank 12 to realize fixation, the first concrete plate test piece 9 is installed on the assembly type mechanism through a first connecting piece, the second concrete plate test piece 10 is installed on the assembly type mechanism through a second connecting piece, and the height of the interlayer gap can be changed by adjusting the first connecting piece and/or the second connecting piece.
After the first concrete slab test piece 9 and the second concrete slab test piece 10 are mounted on the fabricated mechanism, they are kept parallel to each other and arranged correspondingly, i.e. the first concrete slab test piece 9 is located directly above the second concrete slab test piece 10, or alternatively, the second concrete slab test piece 10 is located directly above the first concrete slab test piece 9.
Because the first concrete slab test piece 9 and the second concrete slab test piece 10 are parallel to each other after being installed on the fabricated structure, the gap between the first concrete slab test piece 9 and the second concrete slab test piece 10 forms the interlayer gap, because the first concrete slab test piece 9 and the second concrete slab test piece 10 are correspondingly arranged, four side surfaces of the side edge of the first concrete slab test piece 9 are parallel to four side surfaces of the side edge of the second concrete slab test piece 10 in a one-to-one correspondence manner, the interlayer gap is of a hollow structure and is open at four sides, and therefore the four-side openings of the interlayer gap are respectively: front side opening, back side opening, left side opening and right side opening.
The high-frequency loading device 11 can be a traditional fatigue loading device or a self-designed high-frequency dynamic loading device; high frequency loading device 11 sets up in the top of assembled mechanism, then, back side opening, left side opening and right side opening all pass through the shutoff of elastic sealing spare, and elastic sealing spare preferably sets up to the waterproof glue, bonds in left side opening, right side opening and back side opening department through the waterproof glue, realizes the effect of shutoff.
It should be noted that: the elastic sealing piece has certain elasticity, not only can play a role of sealing, but also can be connected with the first concrete plate test piece 9 and the second concrete plate test piece 10, and under the action of fatigue load, the elastic sealing piece can be repeatedly stretched and has certain elasticity.
The assembly mechanism comprises an upper mounting plate 3, a lower mounting plate 4 and a supporting mechanism, wherein the upper mounting plate 3 and the lower mounting plate 4 are parallel to each other, and the upper mounting plate 3 is arranged right above the lower mounting plate 4, so that the first concrete plate test piece 9 and the second concrete plate test piece 10 can be arranged corresponding to each other after being arranged on the assembly mechanism. In addition, a supporting mechanism is arranged between the upper mounting plate 3 and the lower mounting plate 4, and plays a role in supporting and connecting, so that the connection and fixation between the upper mounting plate 3 and the lower mounting plate 4 are realized.
It should be noted that the supporting mechanism includes a supporting member 6, the supporting member 6 is preferably configured as a plate-like structure, and the upper mounting plate 3 and the lower mounting plate 4 are connected and fixed by the supporting member 6. The support member 6 is preferably vertically arranged during actual installation, the bottom end of the support member 6 is fixedly connected with the lower mounting plate 4, and the top end of the support member 6 is fixedly connected with the upper mounting plate 3.
The supporting mechanism further comprises two reinforcing ribs 5, the two reinforcing ribs 5 are preferably arranged on two sides of the supporting piece 6 respectively, one end of each reinforcing rib 5 is fixedly connected with the lower mounting plate 4, the other end of each reinforcing rib 5 is fixedly connected with the upper portion of the supporting piece 6 or the upper mounting plate 3, and the other end of each reinforcing rib 5 is preferably fixedly connected with the upper mounting plate 3 or the lower mounting plate.
The shape of the reinforcing ribs 5 is preferably a rectangular plate-shaped structure, and the advantages are that: the area is big, and the stationarity is high for it is more firm to be connected between upper mounting panel 3 and the lower mounting panel 4. In addition, the whole assembled mechanism is preferably made of steel, steel rails on the ballastless track can be simulated, namely the upper mounting plate 3, the lower mounting plate 4, the supporting piece 6 and the reinforcing ribs 5 are made of the same steel materials, and fixed connection is achieved through welding.
Preferably, the installation plate 2 is arranged on the top of the upper installation plate 3, and the high-frequency loading device 11 is installed on the installation plate 2, so that the actual train load can be simulated through the operation of the high-frequency loading device 11.
The first concrete slab test piece 9 and the second concrete slab test piece 10 have at least the following two mounting modes when actually mounted on the mounting mechanism:
first, a first concrete slab test piece 9 is mounted on the bottom of the upper mounting plate 3 and a second concrete slab test piece 10 is mounted on the top of the lower mounting plate 4.
Secondly, a first concrete slab test piece 9 is mounted on top of the lower mounting plate 4 and a second concrete slab test piece 10 is mounted on the bottom of the upper mounting plate 3.
Preferably, in the first installation mode, a first concrete slab test piece 9 is installed at the bottom of the upper installation plate 3, and a second concrete slab test piece 10 is installed at the top of the lower installation plate 4.
The first concrete plate test piece 9 is installed at the bottom of the upper installation plate 3 through a first connecting piece, the first connecting piece comprises a first embedded bolt 111 and a first nut 112 which are matched with each other, the head of the first embedded bolt 111 is embedded in the first concrete plate test piece 9 in advance, and the fixed connection between the first embedded bolt 111 and the first concrete plate test piece 9 is achieved.
The second concrete slab test piece 10 is installed on the top of the lower installation plate 4 through a second connecting piece, the second connecting piece comprises a second embedded bolt 151 and a second nut 152 which are used in a matched mode, the head of the second embedded bolt 151 is embedded in the second concrete slab test piece 10 in a pre-embedding mode, and the second embedded bolt 151 is fixedly connected with the second concrete slab test piece 10.
It should be noted that, because the space between the upper mounting plate 3 and the lower mounting plate 4 is limited, there is a sequence of installation when installing the first concrete slab test piece 9 and the second concrete slab test piece 10, and therefore, a reserved gap needs to be provided on the upper mounting plate 3 and/or the lower mounting plate 4, as shown below:
1. if only the bolt holes corresponding to the first embedded bolts 111 are arranged on the first concrete slab test piece 9, the side surface of the lower mounting plate 4 needs to be provided with a reserved notch, and the reserved notch can enable the screw of the second embedded bolt 151 to penetrate through the reserved notch. When the concrete slab test piece is installed, the first concrete slab test piece 9 is installed firstly, the screw rod of the first embedded bolt 111 is inserted into the corresponding bolt hole on the first concrete slab test piece 9, and the first nut 112 is installed on the first embedded bolt 111 to realize the connection between the first concrete slab test piece 9 and the upper installation plate 3; then, the second concrete slab test piece 10 is installed on the lower installation plate 4, meanwhile, the second embedded bolt 151 penetrates through a reserved gap formed in the side face of the lower installation plate 4, and then the second nut 152 is installed, so that the first concrete slab test piece 9 and the second concrete slab test piece 10 are installed.
2. If only the bolt holes corresponding to the second embedded bolts 151 are formed in the lower mounting plate 4, a reserved gap needs to be formed in the side face of the upper mounting plate 3, and the reserved gap can enable the screw of the first embedded bolt 111 to penetrate through the reserved gap. When the concrete slab test piece is installed, a second concrete slab test piece 10 is installed, a screw rod of a second embedded bolt 151 is inserted into a corresponding bolt hole on the second concrete slab test piece 10, and a first nut 112 is installed on the second embedded bolt 151 to realize connection between the second concrete slab test piece 10 and the lower installation plate 4; then, the first concrete slab test piece 9 is installed on the upper installation plate 3, meanwhile, the first embedded bolt 111 transversely penetrates through a reserved notch formed in the side face of the upper installation plate 3, and then the first nut 112 is installed, so that the installation of the first concrete slab test piece 9 and the second concrete slab test piece 10 is achieved.
3. The side of last mounting panel 3 and the side of lower mounting panel 4 have all been seted up and have been reserved the breach, and the reservation breach of going up the 3 sides of mounting panel can make the screw rod of first buried bolt 111 violently pass, and the reservation breach of lower mounting panel 4 sides can make the screw rod of second buried bolt 151 violently pass. When the first concrete slab test piece 9 or the second concrete slab test piece 10 is installed, the first concrete slab test piece 9 and the second concrete slab test piece 10 can be installed without the installation sequence.
In summary, since the second concrete slab test piece 10 is installed first and then the first concrete slab test piece 9 is installed according to the conventional sequence of installation from bottom to top, the second case is preferably used, that is, only the bolt holes corresponding to the second embedded bolts 151 are formed in the lower installation plate 4, and the side surface of the upper installation plate 3 is provided with the reserved gaps. In the third case, although the second concrete slab test piece 10 is installed first and then the first concrete slab test piece 9 is installed, the number of the reserved gaps is correspondingly increased, and the stability of the test piece is affected as the number of the reserved gaps is increased.
After the first concrete slab test piece 9 and the second concrete slab test piece 10 are installed, the height of the interlayer gap can be adjusted by adjusting the first nut 112 and/or the second nut 152.
More preferably, the first connecting member further includes a first gasket, the first gasket is sleeved on the screw of the first embedded bolt 111, and the second connecting member further includes a second gasket, the second gasket is sleeved on the screw of the second embedded bolt 151. When the first nut 112 is adjusted, the number or the thickness of the first gaskets is changed, and the connection between the first concrete slab test piece 9 and the upper mounting plate 3 can be firmer; when the second nut 152 is adjusted, the number or the thickness of the second washer is changed, and the connection between the second concrete slab test piece 10 and the lower mounting plate 4 can be more firmly fixed.
The testing device further comprises a third connecting piece, the lower mounting plate 4 is connected with the prefabricated water tank 12 through the third connecting piece, the third connecting piece comprises a third embedded bolt 141 and a third nut 142 which are matched for use, the head of the third embedded bolt 141 is embedded in the bottom of the prefabricated water tank 12, a bolt hole corresponding to the third embedded bolt 141 is further formed in the lower mounting plate 4, during installation, the third embedded bolt 141 is inserted into the bolt hole in the lower mounting plate 4, and the third nut 142 is installed on the third embedded bolt 141 for locking.
The testing device further comprises a cushion block 13, the cushion block 13 is arranged on the inner bottom surface of the prefabricated water tank 12 and between the lower mounting plate 4, the top end of the cushion block 13 is abutted to the bottom surface of the lower mounting plate 4, the bottom end of the cushion block 13 is abutted to the inner bottom surface of the prefabricated water tank 12, the cushion block 13 can be arranged in a plurality of modes, and the height of the assembly type mechanism can be adjusted by changing the height of the cushion block 13.
It should be noted that: the first connecting piece, the second connecting piece and the third connecting piece can be provided with a plurality of. When the first connecting pieces are arranged in a plurality, the reserved gaps on the upper mounting plate 3 corresponding to the first embedded bolts 111 are correspondingly arranged in a plurality; when the number of the second connecting pieces is multiple, the number of bolt holes corresponding to the second embedded bolts 151 on the lower mounting plate 4 is correspondingly multiple; when the third connecting member is provided in plurality, a plurality of bolt holes corresponding to the third embedded bolts 141 are provided in the lower mounting plate 4.
The height of the gap between the unable adjustment layer of frock that adopts when carrying out the experiment among the prior art, need the maintenance to pour the concrete test piece that has the gap characteristic between the different layers, after the experiment, also can't dismantle and observe test concrete erosion degree of wear, if experimental operating mode is many, the concrete test piece of pouring the certain gap characteristic of maintenance is just many, has increased the test time.
First concrete slab test piece 9 and second concrete slab test piece 10 of this application can install on fabricated machine in a flexible way to after the test, can be convenient for dismantle first concrete slab test piece 9 and second concrete slab test piece 10 and observe and test its change to the erosion and wear condition of test concrete test piece, and can be through adjusting first connecting piece and/or second connecting piece can change the height of layer separation joint can improve measuring effect through the control variable method, reduce the experimental time.
The test principle of this application does:
inject a certain amount of water into precast water tank 12 before the test, guarantee that the water level is higher than the bottom surface of first concrete slab test piece 9, utilize elasticity sealing member to block the left side opening, the right side opening and the rear side opening of layer crack before the water injection, only leave the front side opening as the delivery port, guarantee that the water in 11 loading processes of high frequency loading device layer crack only flows along the front side opening direction.
During testing, the high-frequency loading device 11 operates, when the upper mounting plate 3 deforms under stress, the second concrete plate test piece 10 generates the same displacement, the lower mounting plate 4 is connected with the second concrete plate test piece 10 through the second embedded bolt 151 and the second nut 152, and as the length of the screw rod of the second embedded bolt 151 on the second concrete plate test piece 10 exceeds the bottom surface of the lower mounting plate 4, a plurality of cushion blocks 13 are required to be placed between the bottom surface of the inner cavity of the precast water tank 12 and the bottom surface of the lower mounting plate 4 to keep stable. The lower mounting plate 4 is connected with the prefabricated water tank 12 through a third embedded bolt 141 so as to reduce the influence of self vibration of the assembly type mechanism on a test result during the test. In the test, the height of the interlayer separation seam is adjusted by adjusting the first nut 112 and/or the second nut 152, and after the height of the interlayer separation seam is adjusted, the left opening, the right opening and the rear opening of the interlayer separation seam are required to be plugged again by waterproof glue due to the fact that the waterproof glue is selected for the elastic sealing piece. After the test is finished, the first concrete plate test piece 9 and the second concrete plate test piece 10 can be detached, and the erosion abrasion conditions of the two concrete test pieces are observed and tested.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Furthermore, those skilled in the art will appreciate that while some embodiments herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the claims above, any of the claimed embodiments may be used in any combination. The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A device for testing erosion abrasion of a gap between ballastless track concrete layers is characterized by comprising an assembly type mechanism, a first concrete plate test piece (9), a second concrete plate test piece (10), a prefabricated water tank (12), a first connecting piece, a second connecting piece, an elastic sealing piece and a high-frequency loading device (11);
the assembly type mechanism is arranged at the inner bottom of the precast water tank (12), the first concrete plate test piece (9) is installed on the assembly type mechanism through a first connecting piece, the second concrete plate test piece (10) is installed on the assembly type mechanism through a second connecting piece, the first concrete plate test piece (9) and the second concrete plate test piece (10) are parallel to each other and are arranged correspondingly, a gap between the first concrete plate test piece (9) and the second concrete plate test piece (10) forms the interlayer separation seam, and the interlayer separation seam comprises a front side opening, a rear side opening, a left side opening and a right side opening;
the high-frequency loading device (11) is arranged at the top of the assembly type mechanism, and the opening on the rear side, the opening on the left side and the opening on the right side are all blocked by the elastic sealing piece.
2. The device for testing erosion and wear of the gap between the concrete layers of the ballastless track according to claim 1, wherein the height of the gap between the layers can be changed by adjusting the first connecting piece and/or the second connecting piece.
3. The device for testing the gap erosion wear between the concrete layers of the ballastless track according to claim 1, wherein the assembly mechanism comprises an upper mounting plate (3), a lower mounting plate (4) and a supporting mechanism, the upper mounting plate (3) and the lower mounting plate (4) are parallel to each other, the upper mounting plate (3) is arranged right above the lower mounting plate (4), and the supporting mechanism is arranged between the upper mounting plate (3) and the lower mounting plate (4);
the first concrete plate test piece (9) is installed at the bottom of the upper installation plate (3), and the second concrete plate test piece (10) is installed at the top of the lower installation plate (4).
4. The device for testing the gap erosion wear between the ballastless track concrete layers according to claim 3, wherein a mounting plate (2) is further arranged on the top of the upper mounting plate (3), and the high-frequency loading device (11) is arranged on the mounting plate (2).
5. The device for testing the gap erosion wear between the ballastless track concrete layers according to claim 4, wherein the supporting mechanism comprises a supporting piece (6), the upper mounting plate (3) is fixedly connected with the lower mounting plate (4) through the supporting piece (6), and the supporting piece (6) is arranged on one side close to the rear side opening.
6. The device for testing the gap erosion wear between the concrete layers of the ballastless track according to claim 5, wherein the supporting mechanism further comprises a reinforcing rib (5), one end of the reinforcing rib (5) is connected with the lower mounting plate (4), and the other end of the reinforcing rib (5) is connected with the upper mounting plate (3) or the upper part of the supporting piece (6).
7. The device for testing the gap erosive wear between the ballastless track concrete layers according to claim 1, characterized in that the first connecting piece comprises a first embedded bolt (111) and a first nut (112) which are used in a matching way, and the head of the first embedded bolt (111) is embedded in the first concrete slab test piece (9).
8. The device for testing the gap erosion wear between the concrete layers of the ballastless track according to claim 1, wherein the second connecting member comprises a second embedded bolt (151) and a second nut (152) which are used in a matched manner, and the head of the second embedded bolt (151) is embedded in the second concrete plate test piece (10).
9. The device for testing the gap erosion wear between the ballastless track concrete layers according to claim 3, further comprising a third connecting piece, wherein the lower mounting plate (4) is connected with the prefabricated water tank (12) through the third connecting piece.
10. The device for testing the gap erosion abrasion between the ballastless track concrete layers of claim 9, wherein the third connecting piece comprises a third embedded bolt (141) and a third nut (142) which are used in a matched manner, and the head of the third embedded bolt (141) is embedded in the bottom of the prefabricated water tank (12).
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Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101387597A (en) * | 2008-10-17 | 2009-03-18 | 东南大学 | Concrete hydroosmosis test device under tensile stress and test method |
| CN201266196Y (en) * | 2008-10-17 | 2009-07-01 | 东南大学 | Uniaxial drawing loading unit for tension stress lower concrete carbonizing performance |
| CN102252927A (en) * | 2011-03-24 | 2011-11-23 | 西安交通大学 | Water erosion experimental facility with/under rotary impact of high-pressure water jet |
| CN106840888A (en) * | 2016-11-07 | 2017-06-13 | 西南交通大学 | A kind of Analysis of Concrete Tensile experimental rig and its method of testing |
| CN107447921A (en) * | 2017-09-13 | 2017-12-08 | 清华大学 | High ductile steel-the concrete combination beam of detachable assembling type |
| CN109813626A (en) * | 2019-03-28 | 2019-05-28 | 青岛理工大学 | It is a kind of to hold the concrete water absorption rate test device for carrying action direction in parallel |
| CN110940625A (en) * | 2019-04-25 | 2020-03-31 | 河海大学 | Device and method for simulating permeable concrete blocking mechanism under real rainfall condition |
| CN111157422A (en) * | 2019-12-30 | 2020-05-15 | 中国地质大学（武汉） | Device capable of quantitatively adjusting rock rough fracture opening and using method thereof |
| CN111175225A (en) * | 2020-01-16 | 2020-05-19 | 中铁二院工程集团有限责任公司 | Ballastless track interlayer crack propagation test device and test method |
| CN111811995A (en) * | 2020-07-17 | 2020-10-23 | 中国地质大学（北京） | Visual test method and system for simulating coarse single-cross fracture multiphase seepage |
| US20200404827A1 (en) * | 2019-06-26 | 2020-12-31 | Cnh Industrial America Llc | Wear determination for agricultural implement |
| US20210033522A1 (en) * | 2019-08-02 | 2021-02-04 | King Fahd University Of Petroleum And Minerals | Universal debonding test apparatus for carbon fiber reinforced polymer – concrete system and method for sequential multi-testing |
| WO2021129040A1 (en) * | 2019-12-24 | 2021-07-01 | 青岛理工大学 | Concrete loading device capable of simulating stress state at any point of tunnel |
| CN214784551U (en) * | 2021-04-25 | 2021-11-19 | 长春市市政设施维护管理中心(长春市市政设施抢险大队) | Road inspection shaft structure with prevent subsiding function |
| CN214845280U (en) * | 2021-03-12 | 2021-11-23 | 河南工业大学 | Device for testing flowing water velocity in cracks between concrete layers and concrete test piece for device |
| US11215543B1 (en) * | 2020-11-11 | 2022-01-04 | Institute Of Geology And Geophysics, Chinese Academy Of Sciences | Rock mass shear test system for high-energy accelerator computed tomography (CT) scanning |
-
2022
- 2022-05-11 CN CN202210510992.7A patent/CN114878307B/en active Active
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201266196Y (en) * | 2008-10-17 | 2009-07-01 | 东南大学 | Uniaxial drawing loading unit for tension stress lower concrete carbonizing performance |
| CN101387597A (en) * | 2008-10-17 | 2009-03-18 | 东南大学 | Concrete hydroosmosis test device under tensile stress and test method |
| CN102252927A (en) * | 2011-03-24 | 2011-11-23 | 西安交通大学 | Water erosion experimental facility with/under rotary impact of high-pressure water jet |
| CN106840888A (en) * | 2016-11-07 | 2017-06-13 | 西南交通大学 | A kind of Analysis of Concrete Tensile experimental rig and its method of testing |
| CN107447921A (en) * | 2017-09-13 | 2017-12-08 | 清华大学 | High ductile steel-the concrete combination beam of detachable assembling type |
| CN109813626A (en) * | 2019-03-28 | 2019-05-28 | 青岛理工大学 | It is a kind of to hold the concrete water absorption rate test device for carrying action direction in parallel |
| CN110940625A (en) * | 2019-04-25 | 2020-03-31 | 河海大学 | Device and method for simulating permeable concrete blocking mechanism under real rainfall condition |
| US20200404827A1 (en) * | 2019-06-26 | 2020-12-31 | Cnh Industrial America Llc | Wear determination for agricultural implement |
| US20210033522A1 (en) * | 2019-08-02 | 2021-02-04 | King Fahd University Of Petroleum And Minerals | Universal debonding test apparatus for carbon fiber reinforced polymer – concrete system and method for sequential multi-testing |
| WO2021129040A1 (en) * | 2019-12-24 | 2021-07-01 | 青岛理工大学 | Concrete loading device capable of simulating stress state at any point of tunnel |
| CN111157422A (en) * | 2019-12-30 | 2020-05-15 | 中国地质大学（武汉） | Device capable of quantitatively adjusting rock rough fracture opening and using method thereof |
| CN111175225A (en) * | 2020-01-16 | 2020-05-19 | 中铁二院工程集团有限责任公司 | Ballastless track interlayer crack propagation test device and test method |
| CN111811995A (en) * | 2020-07-17 | 2020-10-23 | 中国地质大学（北京） | Visual test method and system for simulating coarse single-cross fracture multiphase seepage |
| US11215543B1 (en) * | 2020-11-11 | 2022-01-04 | Institute Of Geology And Geophysics, Chinese Academy Of Sciences | Rock mass shear test system for high-energy accelerator computed tomography (CT) scanning |
| CN214845280U (en) * | 2021-03-12 | 2021-11-23 | 河南工业大学 | Device for testing flowing water velocity in cracks between concrete layers and concrete test piece for device |
| CN214784551U (en) * | 2021-04-25 | 2021-11-19 | 长春市市政设施维护管理中心(长春市市政设施抢险大队) | Road inspection shaft structure with prevent subsiding function |
Non-Patent Citations (4)
| Title |
|---|
| DE BAETS 等: "Modelling increased soil cohesion due to roots with EUROSEM", 《EARTH SURFACE PROCESSES AND LANDFORMS》, vol. 33, no. 13, pages 1948 - 1963, XP071511483, DOI: 10.1002/esp.1647 * |
| LI Y 等: "Erosion degradation characteristics of a linear electro-hydrostatic actuator under a high-frequency turbulent flow field", 《CHINESE JOURNAL OF AERONAUTICS》, vol. 31, no. 05, pages 914 - 926 * |
| 娄平 等: "组合载荷作用下CRTSIII型板式无砟轨道层间离缝影响分析", 《铁道科学与工程学报》, vol. 16, no. 12, pages 2913 - 2920 * |
| 赵春光 等: "动荷载与水耦合作用下无砟轨道混凝土层间裂纹扩展研究", 《铁道标准设计》, vol. 62, no. 04, pages 30 - 34 * |
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