CN111119016A - Cement concrete pavement joint cutting time determining device and method - Google Patents
Cement concrete pavement joint cutting time determining device and method Download PDFInfo
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- CN111119016A CN111119016A CN201811283363.5A CN201811283363A CN111119016A CN 111119016 A CN111119016 A CN 111119016A CN 201811283363 A CN201811283363 A CN 201811283363A CN 111119016 A CN111119016 A CN 111119016A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
- E01C23/09—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges
- E01C23/0906—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges for forming, opening-out, cleaning, drying or heating cuts, grooves, recesses or, excluding forming, cracks, e.g. cleaning by sand-blasting or air-jet ; for trimming paving edges
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
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Abstract
The invention discloses a cement concrete pavement joint cutting time determining device and a method, the device comprises a box body, a box cover, a display screen, a clapboard, a main control mechanism, a placing groove, a cushion block, a compression spring, a fixing plate, a temperature measuring mechanism, a power supply, a handle, a lock catch, a rubber sleeve, a wire guide hole, a rubber pad and a guide plate, wherein one end of the box body is hinged with the box cover, the display screen is arranged on the inner wall of the box cover, the clapboard is arranged on one side inside the box body, and the main control mechanism is arranged on one side of the clapboard. The method has practical significance for rapidly developing cement concrete pavements and improving pavement quality.
Description
Technical Field
The invention relates to the technical field of pavement joint cutting, in particular to a device and a method for determining joint cutting time of a cement concrete pavement.
Background
Cement concrete pavements have been widely used in china, but many problems have arisen, such as: cracks, pits, peeling, looseness and the like on the road surface, the joint cutting time is always a factor which is considered emphatically in the road surface construction, the joint cutting is a link which cannot be ignored, if the joint cutting time is not controlled properly, great damage is caused, if the joint cutting time is too early, the strength of concrete is not enough to meet the requirement of cutting strength, and the phenomena of edge deletion and angle drop are easily caused; if the time is too late, the stress generated by the temperature can not be released in time, and when the stress exceeds the breaking strength limit of the concrete, the phenomenon of plate breaking can be caused; when either of the two conditions occurs, the lancing is not meaningful, so that it is important to accurately control the lancing time, which is greatly related to the temperature, and the lancing time is not the same at different temperatures at the same time.
At present, the determination of the joint cutting time of the cement concrete pavement in China does not have a normative method and a normative device, most of the determination is determined by the construction experience of construction technicians, and the determination has great limitation and uncertainty, so that the design of the device and the method for determining the joint cutting time of the cement concrete pavement is needed.
Disclosure of Invention
The invention aims to provide a device and a method for determining the joint cutting time of a cement concrete pavement, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a cement concrete pavement joint cutting time determining device comprises a box body, a box cover, a display screen, a partition plate, a main control mechanism, a placing groove, cushion blocks, compression springs, a fixing plate, a temperature measuring mechanism, a power supply, a handle, a lock catch, a rubber sleeve, a wire guide hole, a rubber pad, a guide plate and damping sheets, wherein the box cover is hinged to one end of the box body, the display screen is installed on the inner wall of the box cover, the partition plate is arranged on one side inside the box body, the main control mechanism is arranged on one side of the partition plate, the placing groove is arranged on the other side of the partition plate, the cushion blocks are arranged in the middle of the lower end inside the placing groove, the compression springs are symmetrically arranged on two side walls of the placing groove, the fixing plate is arranged at one end of the compression springs, the temperature measuring mechanism is clamped on the inner side, a handle is arranged in the middle of one end of the box body, and lock catches are arranged on two sides of the handle;
the main control mechanism comprises a box body, a circuit board, a data acquisition module, a signal processing module, a single chip microcomputer and radiating holes, wherein the circuit board is arranged in the box body, the data acquisition module is welded on one side of the upper end of the circuit board, the signal processing module is welded on one side of the data acquisition module, the single chip microcomputer is welded on one side of the signal processing module, and the radiating holes are uniformly formed in the rear side of the box body;
the temperature measuring mechanism comprises a first sleeve, an end cover, a first slide block, a second sleeve, a limiting block, a sliding groove, a second slide block, a detecting rod, a first groove, a reset spring, a brake block, a brake hole, a second groove and a temperature sensor, wherein the upper end of the first sleeve is in threaded connection with the end cover, the first sleeve is connected with the first slide block in a sliding manner, the second sleeve is arranged in the middle of the lower end of the first slide block, the lower end of the second sleeve extends to the outside of the first sleeve, the limiting block is arranged at the lower end in the first sleeve, the sliding grooves are symmetrically arranged at two ends of the inner wall of the second sleeve, the second slide block is connected in the sliding manner in the sliding groove, the detecting rod is arranged in the middle of the lower end of the second slide block, the first groove is formed in one side of the upper part of the detecting rod, the reset spring is arranged, second grooves are formed in one end of the detection rod at equal intervals relative to the lower side of the first groove, and temperature sensors are mounted inside the second grooves.
A use method of a device for determining joint cutting time of a cement concrete pavement comprises the following steps: step one, drilling holes on a road surface and measuring temperature; analyzing and processing temperature data; step three, calculating the maturity and confirming the joint cutting time;
when the temperature measuring mechanism is used, the second sleeve is pulled out of the first sleeve, the detection rod is pulled out of the second sleeve, the second slide block moves linearly along the sliding groove, when the brake block moves to the braking hole, the brake block pops out of the first groove under the elastic force of the return spring to be spliced with the braking hole, the length of the temperature measuring mechanism can be adjusted, and the temperature in the temperature measuring hole is detected under the action of the temperature sensor;
in the second step, the temperature sensor in the first step detects the temperature in the concrete, the temperature sensor transmits a temperature signal to the data acquisition module, the data acquisition module transmits the data to the signal processing module, the signal processing module analyzes and processes the signal and transmits the signal to the single chip microcomputer, and the single chip microcomputer arranges and transmits the data to the display screen to form a line graph for display;
in the third step, the temperature data T displayed and recorded by the display screen is used as a vertical coordinate, the time T is used as a horizontal coordinate to establish a coordinate system, the area enclosed by the temperature T and the time T is taken, namely, the integral of the temperature T to the time T represents the strength of the concrete, the area is called degree-time product, also called maturity, the numerical value of the maturity is obtained by line drawing and integral calculation, and the time when the maturity is between 200 and 300 is the optimal lancing time, so that the optimal lancing time of the cement concrete pavement is monitored and determined.
According to the technical scheme, the rubber sleeve is sleeved in the middle of the handle, and the anti-skid grains are arranged on the surface of the rubber sleeve.
According to the technical scheme, the brake block is columnar, and the upper end of the brake block is arc-shaped.
According to the technical scheme, wire holes are formed in the middle of the upper ends of the end cover and the second sleeve.
According to the technical scheme, rubber pads are arranged on the inner sides of the cushion blocks and the upper ends of the fixing plates, and the upper ends of the fixing plates are provided with the guide plates.
According to the technical scheme, the lower end of the circuit board is provided with the damping sheet relative to the interior of the box body.
Compared with the prior art, the invention has the beneficial effects that:
1. the portable type portable hand-held device is convenient to carry due to the design of the portable box type;
2. when the temperature of the concrete pavement needs to be detected, a temperature measuring hole is formed in the center of the thickness of the pavement, a temperature measuring mechanism is placed in the temperature measuring hole, the depth of the temperature measuring hole is different due to different thicknesses of the pavement, when the temperature measuring mechanism is used, the second sleeve is pulled out from the inside of the first sleeve, the detecting rod is pulled out from the inside of the second sleeve, the second sliding block moves linearly along the sliding groove, when the brake block moves to the brake hole, the brake block pops out of the first groove under the elastic force of the return spring to be spliced with the brake hole, the length of the temperature measuring mechanism can be adjusted, and the temperature in the temperature measuring hole is detected under the action of;
3. the method can provide an effective method for determining the optimal joint cutting time of the cement concrete pavement under different external environments, avoids the limitation and uncertainty caused by the joint cutting time determined by the construction experience of construction technicians, is simple and easy to test, has good repeatability, has a solid theoretical foundation, is close to relevant international regulations, and has practical significance for rapidly developing the cement concrete pavement and improving the pavement quality.
Drawings
FIG. 1 is an overall block diagram of the present invention;
FIG. 2 is a block diagram of the spacer of the present invention;
FIG. 3 is a block diagram of the circuit board of the present invention;
FIG. 4 is a block diagram of the probe rod of the present invention;
FIG. 5 is a block diagram of the return spring of the present invention;
FIG. 6 is a flow chart of the present invention;
reference numbers in the figures: 1. a box body; 2. a box cover; 3. a display screen; 4. a partition plate; 5. a master control mechanism; 501. a box body; 502. a circuit board; 503. a data acquisition module; 504. a signal processing module; 505. a single chip microcomputer; 506. heat dissipation holes; 6. a placement groove; 7. cushion blocks; 8. a compression spring; 9. a fixing plate; 10. a temperature measuring mechanism; 1001. a first sleeve; 1002. an end cap; 1003. a first slider; 1004. a second sleeve; 1005. a limiting block; 1006. a chute; 1007. a second slider; 1008. a probe rod; 1009. a first groove; 1010. a return spring; 1011. a brake pad; 1012. a brake hole; 1013. a second groove; 1014. a temperature sensor; 11. a power source; 12. a handle; 13. locking; 14. a rubber sleeve; 15. a wire guide hole; 16. a rubber pad; 17. a guide plate; 18. a damping sheet.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Referring to fig. 1-5, the present invention provides a technical solution: a cement concrete pavement joint cutting time determining device comprises a box body 1, a box cover 2, a display screen 3, a partition plate 4, a main control mechanism 5, a placing groove 6, cushion blocks 7, compression springs 8, a fixing plate 9, a temperature measuring mechanism 10, a power supply 11, a handle 12, a lock catch 13, a rubber sleeve 14, a wire guide hole 15, a rubber cushion 16, a guide plate 17 and a damping sheet 18, wherein one end of the box body 1 is hinged with the box cover 2, the display screen 3 is installed on the inner wall of the box cover 2, the partition plate 4 is arranged on one side inside the box body 1, the main control mechanism 5 is arranged on one side of the partition plate 4, the placing groove 6 is arranged on the other side of the partition plate 4, the cushion blocks 7 are arranged in the middle of the lower end inside the placing groove 6, the compression springs 8 are symmetrically arranged on two side walls of the placing groove 6, the fixing plate, the display screen 3, the main control mechanism 5 and the temperature measuring mechanism 10 are all electrically connected with a power supply 11, a handle 12 is arranged in the middle of one end of the box body 1, and lock catches 13 are arranged on two sides of the handle 12;
the main control mechanism 5 comprises a box body 501, a circuit board 502, a data acquisition module 503, a signal processing module 504, a single chip microcomputer 505 and heat dissipation holes 506, wherein the circuit board 502 is arranged inside the box body 501, the data acquisition module 503 is welded on one side of the upper end of the circuit board 502, the signal processing module 504 is welded on one side of the data acquisition module 503, the single chip microcomputer 505 is welded on one side of the signal processing module 504, and the heat dissipation holes 506 are uniformly formed in the rear side of the box body 501;
the temperature measuring mechanism 10 comprises a first sleeve 1001, an end cover 1002, a first slide block 1003, a second sleeve 1004, a limiting block 1005, a sliding groove 1006, a second slide block 1007, a detecting rod 1008, a first groove 1009, a return spring 1010, a braking block 1011, a braking hole 1012, a second groove 1013 and a temperature sensor 1014, wherein the upper end of the first sleeve 1001 is in threaded connection with the end cover 1002, the first slide block 1003 is in sliding connection with the inside of the first sleeve 1001, the second sleeve 1004 is arranged in the middle of the lower end of the first slide block 1003, the lower end of the second sleeve 1004 extends to the outside of the first sleeve 1001, the limiting block 1005 is arranged at the lower end of the inside of the first sleeve 1001, the sliding grooves 1006 are symmetrically arranged at two ends of the inner wall of the second sleeve 1004, the second slide block 1007 is in sliding connection with the second slide block 1007, the detecting rod 1008 is arranged in the middle of the lower end of the second slide block 1007, the first groove 1009 is, a braking hole 1012 is formed at the lower part of the second sleeve 1004 corresponding to the side of the braking block 1011, a second groove 1013 is formed at one end of the detecting rod 1008 at an equal distance relative to the lower side of the first groove 1009, and a temperature sensor 1014 is installed in the second groove 1013.
Referring to fig. 6, the present invention provides a technical solution: a use method of a device for determining joint cutting time of a cement concrete pavement comprises the following steps: step one, drilling holes on a road surface and measuring temperature; analyzing and processing temperature data; step three, calculating the maturity and confirming the joint cutting time;
in the first step, when a cement concrete pavement is newly poured, a temperature measuring hole is formed in the center of the thickness of the pavement, the temperature measuring mechanism 10 is placed in the temperature measuring hole, the depth of the temperature measuring hole is different due to different thicknesses of the pavement, when the temperature measuring mechanism 10 is used, the second sleeve 1004 is pulled out of the first sleeve 1001, the detection rod 1008 is pulled out of the second sleeve 1004, the second slide block 1007 linearly moves along the sliding groove 1006, when the brake block 1011 moves to the brake hole 1012, the brake block 1011 pops out the first groove 1009 under the elastic force of the return spring 1010 to be spliced with the brake hole 1012, the length of the temperature measuring mechanism 10 can be adjusted, and the temperature in the temperature measuring hole is detected under the action of the temperature sensor 1014;
in the second step, the temperature sensor 1014 in the first step detects the internal temperature of the concrete, the temperature sensor 1014 transmits a temperature signal to the data acquisition module 503, the data acquisition module 503 transmits data to the signal processing module 504, the signal processing module 504 transmits the signal to the single chip microcomputer 505 after analyzing and processing the signal, and the single chip microcomputer 505 arranges and transmits the data to the display screen 3 to form a line graph display;
in the third step, the recorded temperature data T is displayed through the display screen 3 as a vertical coordinate, the time T is used as a horizontal coordinate to establish a coordinate system, the area enclosed by the temperature T and the time T is taken, namely, the integral of the temperature T to the time T represents the strength of the concrete, the area is called as a degree-time product, also called as a maturity, the numerical value of the maturity is obtained by line drawing and integral calculation, and the time when the maturity is between 200 and 300 is the optimal lancing time, so that the optimal lancing time of the cement concrete pavement is monitored and determined.
According to the technical scheme, the rubber sleeve 14 is sleeved in the middle of the handle 12, and the anti-skid lines are arranged on the surface of the rubber sleeve 14, so that the anti-skid function is achieved when the device is conveniently extracted.
According to the technical scheme, the brake block 1011 is columnar, and the upper end of the brake block 1011 is arc-shaped, so that the detection rod 1008 and the second sleeve 1004 are limited and fixed conveniently.
According to the technical scheme, the wire guide 15 is formed in the middle of the upper ends of the end cover 1002 and the second sleeve 1004, so that the temperature sensor 1014 can conveniently connect a wire to pass through the wire guide 15 to be electrically connected with the data acquisition module 503.
According to the technical scheme, the rubber mat 16 is arranged on the inner side of the cushion block 7 and the upper end of the fixing plate 9, the guide plate 17 is arranged on the upper end of the fixing plate 9, the inner side of the fixing plate 9 can be smoothly entered when the temperature measuring mechanism 10 is clamped downwards conveniently, and meanwhile, the rubber mat 16 can be prevented from being abraded.
According to the technical scheme, the lower end of the circuit board 502 is provided with the damping sheet 18 relative to the interior of the box body 501.
Based on the above, the portable concrete pavement temperature measuring device has the advantages that the portable concrete pavement temperature measuring device is convenient to carry through the suitcase type design, when the temperature of a concrete pavement needs to be detected, the temperature measuring hole is formed in the center of the thickness of the pavement, the temperature measuring mechanism 10 is placed in the temperature measuring hole, the depths of the temperature measuring holes are different due to different thicknesses of the pavement, when the temperature measuring mechanism 10 is used, the second sleeve 1004 is pulled out from the first sleeve 1001, the detection rod 1008 is pulled out from the second sleeve 1004, the second slide block 1007 linearly moves along the sliding groove 1006, when the brake block 1011 moves to the brake hole 1012, the brake block 1011 pops out the first groove 1009 to be spliced with the brake hole 1012 under the elastic force of the return spring 1010, the length of the temperature measuring mechanism 10 can be adjusted, and the temperature in the temperature measuring hole is detected under the action of the; the method can provide an effective method for determining the optimal joint cutting time of the cement concrete pavement under different external environments, avoids the limitation and uncertainty caused by the joint cutting time determined by the construction experience of construction technicians, is simple and easy to test, has good repeatability, has a solid theoretical foundation, is close to relevant international regulations, and has practical significance for rapidly developing the cement concrete pavement and improving the pavement quality.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. 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 (7)
1. The utility model provides a cement concrete road surface joint cutting time confirms device, includes box (1), case lid (2), display screen (3), baffle (4), main control mechanism (5), standing groove (6), cushion (7), compression spring (8), fixed plate (9), temperature measurement mechanism (10), power (11), handle (12), hasp (13), rubber sleeve (14), wire guide (15), cushion (16), deflector (17) and shock attenuation piece (18), its characterized in that: the box body is characterized in that a box cover (2) is hinged to one end of the box body (1), a display screen (3) is installed on the inner wall of the box cover (2), a partition plate (4) is arranged on one side inside the box body (1), a main control mechanism (5) is arranged on one side of the partition plate (4), a placing groove (6) is arranged on the other side of the partition plate (4), a cushion block (7) is arranged in the middle of the lower end inside the placing groove (6), compression springs (8) are symmetrically arranged on two side walls of the placing groove (6), a fixing plate (9) is arranged at one end of each compression spring (8), a temperature measuring mechanism (10) is clamped on the inner side of each fixing plate (9) relative to the upper end of each cushion block (7), a power supply (11) is arranged on one side of the placing groove (6), the display screen (3), the main control mechanism (5, the two sides of the handle (12) are provided with lock catches (13);
the main control mechanism (5) comprises a box body (501), a circuit board (502), a data acquisition module (503), a signal processing module (504), a single chip microcomputer (505) and heat dissipation holes (506), wherein the circuit board (502) is arranged inside the box body (501), the data acquisition module (503) is welded on one side of the upper end of the circuit board (502), the signal processing module (504) is welded on one side of the data acquisition module (503), the single chip microcomputer (505) is welded on one side of the signal processing module (504), and the heat dissipation holes (506) are uniformly formed in the rear side of the box body (501);
the temperature measuring mechanism (10) comprises a first sleeve (1001), an end cover (1002), a first sliding block (1003), a second sleeve (1004), a limiting block (1005), a sliding groove (1006), a second sliding block (1007), a detection rod (1008), a first groove (1009), a reset spring (1010), a brake block (1011), a brake hole (1012), a second groove (1013) and a temperature sensor (1014), wherein the upper end of the first sleeve (1001) is in threaded connection with the end cover (1002), the first sleeve (1001) is in sliding connection with the first sliding block (1003), the middle part of the lower end of the first sliding block (1003) is provided with the second sleeve (1004), the lower end of the second sleeve (1004) extends to the outside of the first sleeve (1001), the lower end of the inside of the first sleeve (1001) is provided with the limiting block (1005), two ends of the inner wall of the second sleeve (1004) are symmetrically provided with the sliding grooves (1006), the second sliding block (1007) is in sliding connection with the sliding, the temperature sensor is characterized in that a detection rod (1008) is arranged in the middle of the lower end of the second sliding block (1007), a first groove (1009) is formed in one side of the upper portion of the detection rod (1008), a return spring (1010) is arranged in the first groove (1009), a brake block (1011) is arranged at the upper end of the return spring (1010), a brake hole (1012) is formed in one side, corresponding to the brake block (1011), of the lower portion of the second sleeve (1004), a second groove (1013) is formed in one end of the detection rod (1008) at an equal distance relative to the lower side of the first groove (1009), and a temperature sensor (1014) is arranged in the second groove.
2. A use method of a device for determining joint cutting time of a cement concrete pavement comprises the following steps: step one, drilling holes on a road surface and measuring temperature; analyzing and processing temperature data; step three, calculating the maturity and confirming the joint cutting time; the method is characterized in that:
in the first step, when a cement concrete pavement is poured newly, a temperature measuring hole is formed in the center of the thickness of the pavement, the temperature measuring mechanism (10) is placed in the temperature measuring hole, the depth of the temperature measuring hole is different due to different thicknesses of the pavement, when the temperature measuring mechanism (10) is used, the second sleeve (1004) is pulled out from the inside of the first sleeve (1001), the detection rod (1008) is pulled out from the inside of the second sleeve (1004), so that the second slide block (1007) moves linearly along the sliding groove (1006), when the brake block (1011) moves to the brake hole (1012), the brake block (1011) pops out the first groove (1009) under the elastic force of the return spring (1010) to be inserted into the brake hole (1012), further, the length of the temperature measuring mechanism (10) can be adjusted, and the temperature in the temperature measuring hole is detected under the action of the temperature sensor (1014);
in the second step, the temperature sensor (1014) in the first step detects the internal temperature of the concrete, the temperature sensor (1014) transmits a temperature signal to the data acquisition module (503), the data acquisition module (503) transmits data to the signal processing module (504), the signal processing module (504) analyzes and processes the signal and transmits the signal to the single chip microcomputer (505), and the single chip microcomputer (505) arranges and transmits the data to the display screen (3) to form a line graph for display;
in the third step, the recorded temperature data T is displayed through the display screen (3) and is used as a vertical coordinate, a coordinate system is established by taking the time T as a horizontal coordinate, the area enclosed by the temperature T and the time T is taken, namely the integral of the temperature T to the time T represents the strength of the concrete, the area is called degree-time product which is also called maturity, the numerical value of the maturity is obtained by line drawing and integral calculation, and the time when the maturity is between 200 and 300 is used as the optimal lancing time, so that the optimal lancing time of the cement concrete pavement is monitored and determined.
3. The slitting time determining device for a cement concrete pavement according to claim 1, wherein: the middle part of the handle (12) is sleeved with a rubber sleeve (14), and the surface of the rubber sleeve (14) is provided with anti-skid lines.
4. The slitting time determining device for a cement concrete pavement according to claim 1, wherein: the brake block (1011) is columnar, and the upper end of the brake block (1011) is arc-shaped.
5. The slitting time determining device for a cement concrete pavement according to claim 1, wherein: the middle parts of the upper ends of the end cover (1002) and the second sleeve (1004) are provided with wire holes (15).
6. The slitting time determining device for a cement concrete pavement according to claim 1, wherein: cushion (7) inboard and fixed plate (9) upper end all are provided with cushion (16), and fixed plate (9) upper end is provided with deflector (17).
7. The slitting time determining device for a cement concrete pavement according to claim 1, wherein: the lower end of the circuit board (502) is provided with a damping sheet (18) relative to the interior of the box body (501).
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| CN201811283363.5A CN111119016A (en) | 2018-10-31 | 2018-10-31 | Cement concrete pavement joint cutting time determining device and method |
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| CN201811283363.5A CN111119016A (en) | 2018-10-31 | 2018-10-31 | Cement concrete pavement joint cutting time determining device and method |
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