CN209784269U - Gridding high-speed railway supporting layer concrete wave velocity detection device - Google Patents
Gridding high-speed railway supporting layer concrete wave velocity detection device Download PDFInfo
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- CN209784269U CN209784269U CN201920311381.3U CN201920311381U CN209784269U CN 209784269 U CN209784269 U CN 209784269U CN 201920311381 U CN201920311381 U CN 201920311381U CN 209784269 U CN209784269 U CN 209784269U
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Abstract
the utility model discloses a high-speed railway supporting layer concrete wave speed detection device of latticed relates to high-speed railway ballastless track concrete quality nondestructive test technical field, including track board and supporting layer, supporting layer top intermediate position is equipped with the track board, the supporting layer upper surface is the elastic wave and receives the face, the supporting layer is the elastic wave along the side of track extending direction and arouses the face. The utility model provides a fine scale of high-speed railway ballastless track supporting layer concrete intensity detect the problem, overcome traditional drill core sample to the destruction of structure, refined the detection yardstick, have easy operation, harmless, detect the characteristics that the precision is high, be fit for the detection of supporting layer concrete wave speed, be fit for the supporting layer internal strength large tracts of land and detect the demand, be favorable to improving the maintenance level of the ballastless track of the high-speed railway of China.
Description
Technical Field
The utility model relates to a high-speed railway ballastless track concrete quality nondestructive test technical field, in particular to latticed high-speed railway supporting layer concrete wave speed detection device.
background
The ballastless track of the high-speed railway is used as a carrier of the high-speed railway, the quality of the ballastless track is good and bad, whether diseases exist inside the ballastless track or not is directly related to the operation safety of the high-speed railway. But the concrete strength is inevitably reduced due to the long-term action of external loads such as trains, rain environments and the like. Particularly, for a bearing layer structure of a cast-in-place site, the bearing layer structure is influenced by factors such as temperature during pouring, the strength of concrete cannot meet the design requirement, and the bearing layer structure is washed by rainwater for a long time, so that concrete mortar flows out, the porosity is increased, the strength of concrete is rapidly reduced, and the running safety of a high-speed train is influenced.
The detection device commonly used at present is a core drilling sampling device and an ultrasonic rebound device, and the core drilling sampling device has the following defects: (1) the sampling position is the edge of the supporting layer, and the concrete strength at the center of the lower part of the track slab cannot be obtained; (2) core drilling sampling damages the integrity of the structure and aggravates the degradation speed of the structure; (3) the core drilling sampling has randomness, and the requirement of large-area detection of the concrete strength of the bearing layer cannot be met. The ultrasonic rebound device is a representative of a wave velocity detection device, the device firstly analyzes the relation between the ultrasonic wave velocity and the concrete strength through regression, and then calculates the wave velocity by using the first wave time difference between a transmitting transducer and a receiving transducer, so as to obtain the average concrete strength of a roadbed passing through.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a high-speed railway supporting layer concrete wave speed detection device of meshing for solve the problem that exists among the prior art.
The device for detecting the concrete wave velocity of the latticed high-speed railway supporting layer comprises a track plate and a supporting layer, wherein the track plate is arranged in the middle position above the supporting layer, the upper surface of the supporting layer is an elastic wave receiving surface, and the side surface of the supporting layer along the extending direction of a track is an elastic wave excitation surface;
A plurality of elastic wave excitation devices are horizontally arranged on the elastic wave excitation surface at fixed intervals, a plurality of elastic wave receiving sensors are horizontally arranged on one side, far away from the elastic wave excitation surface, of the elastic wave receiving surface at fixed intervals, and the plurality of elastic wave receiving sensors and the plurality of elastic wave excitation devices are in one-to-one correspondence and are positioned on the same plane;
The elastic wave excitation device is electrically connected with the program controller, the program controller is electrically connected with the data collector and the computer, and the data collector is electrically connected with the elastic wave receiving sensor.
preferably, the elastic wave receiving sensor is disposed on the elastic wave receiving surface with the rail plate end surface corresponding position as an initial point, and the elastic wave excitation device is disposed on the elastic wave excitation surface with the rail plate end surface corresponding position as an initial point.
Preferably, the fixed interval is 10 cm.
preferably, a plurality of the elastic wave receiving sensors simultaneously receive elastic wave data of the elastic wave excitation device.
Preferably, the elastic wave excitation device comprises a 12V direct current power supply, an excitation device controller and an execution mechanism, and the positive electrode and the negative electrode of the 12V direct current power supply are electrically connected with the excitation device controller and the execution mechanism respectively.
preferably, the actuating mechanism is a push-pull electromagnet.
preferably, the excitation device controller is a Siemens S200 series programmable logic controller.
preferably, Danish Bruel is used as the elastic wave receiving sensor&4370 piezoelectric charge acceleration sensor.
Preferably, the data collector adopts Altai PCI9018, and the program controller adopts an LBOX-GM45 embedded industrial personal computer controlled by Lingjiang industry.
The utility model discloses beneficial effect: the utility model provides a fine scale of high-speed railway ballastless track supporting layer concrete intensity detect the problem, overcome traditional drill core sample to the destruction of structure, refined the detection yardstick, have easy operation, harmless, detect the characteristics that the precision is high, be fit for the detection of supporting layer concrete wave speed, be fit for the supporting layer internal strength large tracts of land and detect the demand, be favorable to improving the maintenance level of the ballastless track of the high-speed railway of China.
drawings
Fig. 1 is a schematic structural diagram of a ballastless track structure and excitation-reception position selection of a gridded high-speed railway supporting layer concrete wave speed detection device provided by the embodiment of the present invention;
Fig. 2 is a schematic structural diagram of laying-out positions of elastic wave excitation points and elastic wave receiving points of the device for detecting the concrete wave velocity of a supporting layer of a meshed high-speed railway provided by the embodiment of the invention;
Fig. 3 is a schematic structural view of a ballastless track supporting layer concrete strength detecting device of a gridded high-speed railway supporting layer concrete wave speed detecting device provided by the embodiment of the utility model;
Fig. 4 is a schematic view of the structure of the elastic wave excitation device and the wiring structure of the device for detecting the wave velocity of concrete on the supporting layer of a meshed high-speed railway provided by the embodiment of the present invention;
fig. 5 is a schematic structural diagram of a supporting layer elastic wave propagation grid model of a meshed device for detecting a concrete wave speed of a supporting layer of a high-speed railway according to an embodiment of the present invention.
Description of reference numerals:
1-track plate, 2-supporting layer, 3-elastic wave excitation surface and 4-elastic wave receiving surface.
Detailed Description
The technical solution in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, but it should be understood that the scope of the present invention is not limited by the specific embodiments.
Referring to fig. 1-5, the utility model provides a latticed high-speed railway supporting layer concrete wave speed detection device, including track board 1 and supporting layer 2, the intermediate position is equipped with the track board 1 above supporting layer 2, the supporting layer 2 upper surface is elastic wave receiving surface 3, the supporting layer 2 side along the track extending direction is elastic wave excitation surface 4;
the elastic wave receiving surface 3 is provided with a plurality of elastic wave receiving sensors, the elastic wave receiving sensors and the elastic wave excitation devices are in one-to-one correspondence and are positioned on the same plane.
Fig. 2 shows a layout of measuring points when the number of positions of the elastic wave excitation device and the elastic wave receiving sensor is 16. Where '+' denotes the elastic wave excitation device position and '+' denotes the elastic wave reception sensor position. Meanwhile, in order to improve the later-stage wave velocity detection precision, a tape measure is required to be used for lofting before the arrangement of the excitation point and the receiving point of the elastic wave, the positions of the excitation point and the receiving point are accurately marked, and the ith excitation point and the ith receiving point are in the same plane.
it should be noted that, for the later stage data processing of the aspect, the utility model discloses a "one place arouses, the operating system of many places receipt", that is to say arouse in the ith department, place 16 elastic wave receiving transducer simultaneously and receive elastic wave data in receiving side 1-16 departments altogether.
the elastic wave excitation device is electrically connected with the program controller through a serial port, the program controller is electrically connected with the data acquisition unit in a bidirectional mode through a PCI bus, and the data acquisition unit is electrically connected with the elastic wave receiving sensor.
The elastic wave excitation device comprises a 12V direct-current power supply, an excitation device controller and an execution mechanism, wherein the positive electrode and the negative electrode of the 12V direct-current power supply are respectively electrically connected with the excitation device controller and the execution mechanism. The actuating mechanism is a push-pull electromagnet, and the excitation device controller adopts a Siemens S200 series programmable logic controller (hereinafter referred to as PLC). In order to facilitate field operation, a 12V direct-current power supply adopts a 12V100AH lithium battery, the positive electrode and the negative electrode are respectively connected with an elastic wave excitation device and a push-pull electromagnet, the positive electrode of the power supply is connected with a 1M pin of a PLC, and the negative electrode of the power supply is connected with the negative electrode of an actuating mechanism.
The PLC is in control connection with the program controller through a serial port, and the baud rate of the serial port is set to 9600; A1M pin in the PLC is connected with the positive pole of a 12V direct-current power supply, and an SM0.0 pin is connected with the positive pole of an actuating mechanism. In a normal state, the SM0.0 pin and the 1M pin are in a normally open state, when the PLC receives an excitation instruction sent by the controller through a serial port, an SM0.0 relay in the PLC is closed, the SM0.0 pin and the 1M pin are conducted, at the moment, a 12V power supply of the actuating mechanism is connected, and the actuating structure works;
The actuating mechanism adopts a push-pull electromagnet, and when the power supply is disconnected, the push-pull electromagnet is in a bouncing state under the action of a spring; when the power supply is switched on, the push-pull type electromagnet is in a stress stage, and the iron core knocks the concrete surface of the supporting layer to excite the elastic wave.
the elastic wave receiving sensor is used for detecting elastic waves excited by the elastic wave excitation device and adopts Denmark Bruel&The 4370 model piezoelectric charge acceleration sensor is connected with a data acquisition unit through a BNC connecting line, wherein the data acquisition unit adopts an Altai PCI9018, the PCI9018 is a 16-channel synchronous analog input data acquisition card, the frequency is 80KHz, and the sampling digit is 14 digits. The PCI9018 of the data acquisition device adopts an SCSI interface, and the sensor is a BNC interface, so that the connection between the data acquisition device and the acceleration sensor is realized by converting BNC into an SCSI switching interface; the acquisition strategy of the data acquisition unit is controlled by the software of the program controller.
the program controller controls and records the excitation time of the elastic wave excitation device, controls the acquisition strategy of the data acquisition unit, receives and displays the elastic wave vibration data acquired by the data acquisition unit, stores the excitation time of the elastic wave excitation device and the acquired data of the data acquisition unit in a serialized mode, and then the computer calculates the primary elastic wave velocity according to the transmission time of the elastic wave transmitted by the program controller and the transmission distance of the elastic wave.
the program controller adopts an LBOX-GM45 embedded industrial personal computer controlled by Lingjiang industry, the industrial personal computer is provided with 2 PCI expansion slots and 4 serial ports, and the communication requirements of a data acquisition unit PCI9018 interface and a PLC control unit can be met.
The preliminary elastic wave velocity specific detection step comprises the following steps:
Firstly, selecting one side which is parallel to the direction of a high-speed railway line and vertical to the ground as an elastic wave signal excitation side, and selecting one side which is parallel to the direction of the high-speed railway line and parallel to the ground as an elastic wave signal receiving side;
Step two, taking the transverse edge of the track slab on the upper part of the supporting layer as an initial point, and arranging an elastic wave excitation device and an elastic wave receiving sensor at fixed intervals;
Step three, acquiring an elastic wave excitation device excitation data waveform time signal and an elastic wave receiving sensor receiving waveform time signal simultaneously in a multi-excitation multi-point receiving mode;
Step four, according to the time t of the excitation waveform0And the arrival time of the signal received by the ith receiver at the receiving side is obtained as tiObtaining the propagation time Deltat of the elastic wavei＝ti-t0The supporting layer is divided into (m × n), and when the elastic wave excitation device is at the position p, the elastic wave receiving sensor at the position q has a path through the grid (i, j)thereby obtaining the transmission path and time of the elastic wave, and further calculating to obtain the wave velocity v of the preliminary elastic waveij。
To sum up, the utility model provides a fine-scale detection problem of high-speed railway ballastless track supporting layer concrete intensity, overcome the destruction of traditional drill core sample to the structure, refined the detection yardstick, have easy operation, harmless, detect the characteristics that the precision is high, be fit for the detection of supporting layer concrete wave speed, be fit for the supporting layer internal strength large tracts of land and detect the demand, be favorable to improving the maintenance level of the ballastless track of the high-speed railway of our country.
The above disclosure is only one specific embodiment of the present invention, however, the present invention is not limited thereto, and any changes that can be considered by those skilled in the art should fall within the protection scope of the present invention.
Claims (7)
1. The concrete wave velocity detection device for the grid-structured high-speed railway supporting layer is characterized by comprising a track plate (1) and a supporting layer (2), wherein the track plate (1) is arranged in the middle position above the supporting layer (2), the upper surface of the supporting layer (2) is an elastic wave receiving surface (3), and the side surface of the supporting layer (2) along the track extending direction is an elastic wave excitation surface (4);
A plurality of elastic wave excitation devices are horizontally arranged on the elastic wave excitation surface (4) at fixed intervals, a plurality of elastic wave receiving sensors are horizontally arranged on one side, far away from the elastic wave excitation surface (4), of the elastic wave receiving surface (3) at fixed intervals, and the plurality of elastic wave receiving sensors and the plurality of elastic wave excitation devices are in one-to-one correspondence and are located on the same plane;
The elastic wave excitation device is electrically connected with the program controller, the program controller is electrically connected with the data collector and the computer, and the data collector is electrically connected with the elastic wave receiving sensor.
2. The concrete wave speed detecting apparatus for a supporting layer of a meshed high-speed railway according to claim 1, wherein the elastic wave receiving sensor is disposed on the elastic wave receiving surface (3) with the rail plate (1) end surface corresponding position as an initial point, and the elastic wave exciting apparatus is disposed on the elastic wave exciting surface (4) with the rail plate (1) end surface corresponding position as an initial point.
3. The apparatus for detecting the concrete wave speed of a supporting layer of a meshed high-speed railway according to claim 1, wherein the fixed interval is 10 cm.
4. the concrete wave speed detection device for the supporting layer of the gridded high-speed railway according to claim 1, wherein the elastic wave excitation device comprises a 12V direct current power supply, an excitation device controller and an actuator, and the positive pole and the negative pole of the 12V direct current power supply are electrically connected with the excitation device controller and the actuator respectively.
5. The apparatus according to claim 4, wherein the actuator is a push-pull electromagnet.
6. The concrete wave speed detection device for the gridded high-speed railway supporting layer is characterized in that the excitation device controller adopts a Siemens S200 series programmable logic controller.
7. The concrete wave speed detection device for the gridded high-speed railway supporting layer is characterized in that the data collector adopts Altai PCI9018, and the program controller adopts an LBOX-GM45 embedded industrial personal computer controlled by Lingjiang industry.
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| CN201920311381.3U CN209784269U (en) | 2019-03-12 | 2019-03-12 | Gridding high-speed railway supporting layer concrete wave velocity detection device |
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| CN201920311381.3U CN209784269U (en) | 2019-03-12 | 2019-03-12 | Gridding high-speed railway supporting layer concrete wave velocity detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109738525A (en) * | 2019-03-12 | 2019-05-10 | 石家庄铁道大学 | The high-speed railway bearing layer concrete velocity of wave detection device and estimation method of gridding |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109738525A (en) * | 2019-03-12 | 2019-05-10 | 石家庄铁道大学 | The high-speed railway bearing layer concrete velocity of wave detection device and estimation method of gridding |
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