CN114753219A - Road springback and deflection detection device based on Beckman beam method and use method - Google Patents
Road springback and deflection detection device based on Beckman beam method and use method Download PDFInfo
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- CN114753219A CN114753219A CN202210363599.XA CN202210363599A CN114753219A CN 114753219 A CN114753219 A CN 114753219A CN 202210363599 A CN202210363599 A CN 202210363599A CN 114753219 A CN114753219 A CN 114753219A
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- 238000012360 testing method Methods 0.000 claims abstract description 49
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- 229910000831 Steel Inorganic materials 0.000 claims description 27
- 239000010959 steel Substances 0.000 claims description 27
- 238000013459 approach Methods 0.000 claims description 4
- 239000010985 leather Substances 0.000 claims description 4
- 230000003068 static effect Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 5
- 238000011065 in-situ storage Methods 0.000 abstract description 2
- 238000004804 winding Methods 0.000 description 7
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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
- E01C23/01—Devices or auxiliary means for setting-out or checking the configuration of new surfacing, e.g. templates, screed or reference line supports; Applications of apparatus for measuring, indicating, or recording the surface configuration of existing surfacing, e.g. profilographs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
- B65G47/74—Feeding, transfer, or discharging devices of particular kinds or types
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
- B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
- B65H75/34—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables
- B65H75/38—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables involving the use of a core or former internal to, and supporting, a stored package of material
- B65H75/44—Constructional details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/35—Ropes, lines
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Road Repair (AREA)
Abstract
The invention discloses a device for detecting the rebound and deflection of a road based on a Beckman beam method and a using method thereof, wherein the detection device comprises a connecting frame; a platform truck; the Beckman beam is hinged with the platform truck; the sliding assembly comprises a sliding block and a supporting rod, the sliding block is connected with the platform car in a sliding mode, the supporting rod is installed on the sliding block, and the supporting rod can jack up the Beckman beam; the traction assembly comprises a motor, a contact switch and a rope, the motor is electrically connected with the contact switch, the contact switch can be triggered by a sliding block, and the rope bypasses a connecting frame and two ends of the rope are connected to an output shaft and the sliding block of the motor respectively. According to the invention, the Beckman beams are loaded on the platform truck, and the platform truck can be driven to move when the connecting frame moves, so that the labor burden when the measuring equipment is carried is reduced; during the testing process, the link moves and the platform truck stays in situ through the rope unwrapping wire for data acquisition, and after the testing is completed, the motor can be triggered to wind the rope, so that the platform truck returns to the tail of the link to prepare for the measurement of the next measuring point.
Description
Technical Field
The invention relates to a device for detecting the rebound and deflection of a road based on a Beckman beam method and a using method thereof, belonging to the technical field of municipal engineering detection equipment.
Background
The road deflection detection is an important index for detecting the construction quality and the bearing capacity in the operation stage of road engineering. The qualified bearing capacity reflects the qualified construction quality and also means the safe operation of the road. At present, the method of detecting the rebound deflection of the road by the Beckman beam method is still an important means in the design and construction of the road in China and even the world.
At present, the Beckmann method is generally adopted to detect the rebound deflection of road engineering, and the detection frequency is 1 point/(20 m per lane) in a tested road section. The equipment consists of a Beckman beam, a dial indicator and a gauge stand, and is matched with a standard test vehicle with a single rear shaft and a single-side double wheel set which meet the specification for detection. The Beckman beam is a straight aluminum alloy beam, the middle part of the Beckman beam is hinged with the support, the length ratio of the front arm to the rear arm is 2:1, the front end of the Beckman beam touches the ground, and the rear end of the Beckman beam is connected with the dial indicator. When the experiment begins, the front end of the Beckman beam is inserted to the position 30-50 mm away from the gap between the two rear wheel sets on the single side of the test vehicle. Then, the experimenter drives the test vehicle to drive away to 3 meters, and the other experimenter records the maximum value L of the dial indicator1And a stable value L2And calculating the formula L2X L according to the standard specification2-L1And | obtaining the rebound deflection value of the measuring point. During actual test, due to multiple lanes of the road, the test vehicle with a single rear axle and a single-side double wheel set can walk between two adjacent lanes, and the single-side double wheel set respectively runs in one lane, so that two Beckman beams can be used simultaneously to perform deflection detection on the two lanes, and the detection efficiency is further relatively improved.
However, the testing process is cumbersome and requires multiple persons to operate in tandem. In the experimental process, one person needs to drive a standard loading vehicle, four persons are divided into two groups, two Beckman beams are respectively inserted into the gap between the rear wheels of the vehicle at each measuring point, one person needs to debug a dial indicator and read a numerical value, one person needs to record, and the other person needs to command the loading vehicle, so that eight persons are needed to cooperatively work to complete the detection of the deflection value, the efficiency is low, and a large amount of manpower is wasted. Moreover, the length of the Beckman beam reaches several meters, and when a plurality of measuring points need to be measured, a plurality of persons need to carry the Beckman beam together, so that the labor burden in the testing process is further increased.
Disclosure of Invention
The invention aims to solve at least one technical problem in the prior art, and provides a device for detecting road rebound and deflection based on a Beckman beam method and a using method thereof, which can reduce the labor burden of experimenters.
According to a first aspect of the present invention, there is provided a device for detecting road rebound and deflection based on the beckmann beam method, including:
the connecting frame is used for being installed at the tail part of the test vehicle and is provided with a fixed pulley;
the bottom of the platform car is provided with a plurality of rollers;
the Berkelman beam is hinged with the platform truck, the distance ratio of the hinged point to the front end and the rear end of the Berkelman beam is 2:1, the front end of the Berkelman beam can be in contact with the ground, the rear end of the Berkelman beam is provided with a dial indicator, and a measuring head of the dial indicator is in contact with the ground;
the sliding assembly comprises a sliding block and a supporting rod, the sliding block is connected with the platform car in a sliding mode, the supporting rod is installed on the sliding block, and one end of the supporting rod can be in contact with the Beckman beam and jacks up the Beckman beam;
the traction assembly comprises a motor, a contact switch and a rope, the motor is electrically connected with the contact switch, the contact switch is arranged at the front end of the stroke of the sliding block and can be triggered by the sliding block, and the rope bypasses the fixed pulley and two ends of the rope are respectively connected to the output shaft of the motor and the sliding block.
According to the embodiment of the first aspect of the invention, furthermore, a guide frame is further arranged at the tail part of the connecting frame, the guide frame comprises two pieces of C-shaped steel, and grooves of the two pieces of C-shaped steel are oppositely arranged; the sliding assembly further comprises a T-shaped frame, the T-shaped frame is mounted on the sliding block, a cross rod is arranged at the end of the T-shaped frame, and two ends of the cross rod can respectively slide into the grooves of the two C-shaped steel.
According to the embodiment of the first aspect of the present invention, further, a distance between rear ends of the two C-shaped steels is greater than a distance between front ends of the two C-shaped steels, and a distance between front ends of the two C-shaped steels is equal to a length of the cross bar.
According to the embodiment of the first aspect of the invention, further, the number of the cross bars is two, and the two cross bars are arranged in parallel and can slide into the grooves of the C-shaped steel.
According to the embodiment of the first aspect of the present invention, further, the bottom of the beckmann beam is provided with a limiting block, the surface of the limiting block is wavy, two ends of the limiting block protrude and the middle of the limiting block is concave, and one end of the support rod can slide into the concave pit of the limiting block.
According to an embodiment of the first aspect of the present invention, further, the sliding assembly further comprises a spring, two ends of the spring are respectively connected to the sliding block and the platform car, and the spring provides a backward driving force to the sliding block.
According to an embodiment of the first aspect of the present invention, further, the device for detecting road springback and deflection based on the beckman beam method further includes a leather connecting band, and two ends of the leather connecting band are respectively connected to the rear end of the beckman beam and a measuring head of the dial indicator.
According to an embodiment of the first aspect of the present invention, further, the dial indicator is a digital display dial indicator.
According to the embodiment of the first aspect of the invention, the device for detecting the rebound and deflection of the road based on the beckmann beam method further comprises a numerical control device, wherein the numerical control device is electrically connected with the digital display dial indicator and is used for recording an experimental result.
According to a second aspect of the present invention, there is provided a method for using a device for detecting road rebound and deflection based on the beckman beam method, including:
the platform truck is connected with the connecting frame through the rope, the connecting frame is installed at the tail of the test truck, the redundant rope is wound on an output shaft of the motor, and the position of the Beckman beam is adjusted, so that the front end of the Beckman beam can extend into the gap between the rear wheels of the connecting frame;
sliding the sliding block to the rear end of the stroke, wherein the front end of the Beckman beam is in contact with the ground and is positioned on a measuring point 30-50 mm in front of the gap between the two rear wheels of the test vehicle;
starting the test vehicle and driving away along a straight line to drive the output shaft of the motor to rotate and release the rope wound on the output shaft, continuously recording the reading by the dial indicator, and obtaining the maximum reading value L1；
The test vehicle drives to the distance 3 meters outside the platform vehicle, the rope is completely released, and the stable value L of the dial indicator is read2The road bounce and deflection value L is 2 × L2-L1|；
The test vehicle continues to run, the sliding block is dragged to move forwards through the rope, the supporting rod is in contact with the Beckman beam, and the front end of the Beckman beam is ejected from the ground;
the sliding block moves to the front end of the stroke of the sliding block and triggers the contact switch, the motor is started and winds and recovers the rope, and the platform car gradually approaches the connecting frame until the platform car is contacted with the tail of the connecting frame;
the testing vehicle brakes, the sliding block and the connecting frame are relatively static, the platform vehicle moves forwards due to inertia, the Beckman beam moves forwards relative to the supporting rod, the front end of the Beckman beam is contacted with the ground again, the contact switch is separated from the sliding block, and the contact switch resets;
the test vehicle continues to run to drive the output shaft of the motor to rotate and release the rope wound on the output shaft of the motor, and the dial indicator records the deflection change reading of the road section;
and (5) circulating the steps to obtain road resilience deflection values of the plurality of measuring points, and finishing the detection.
The embodiment of the invention has the beneficial effects that: according to the invention, the Beckman beams are loaded on the platform truck, and the platform truck can be driven to move when the connecting frame moves, so that the labor burden when the measuring equipment is carried is reduced; during the testing process, the link moves and the platform truck stays in situ through the rope unwrapping wire for data acquisition, and after the testing is completed, the motor can be triggered to wind the rope, so that the platform truck returns to the tail of the link to prepare for the measurement of the next measuring point.
Drawings
In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures are only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from them without inventive effort.
FIG. 1 is a side view of an embodiment of the first aspect of the present invention;
FIG. 2 is a top view of an embodiment of the first aspect of the present invention;
fig. 3 is a partially enlarged view of the connection frame in the first aspect of the present invention.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element 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.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1 to 2, the device for detecting road rebound and deflection based on the beckman beam method in the first embodiment of the invention comprises a connecting frame 1, a platform truck 2, a beckman beam 3, a dial indicator 4, a sliding assembly 5 and a traction assembly 6. Wherein link 1 is the part of being connected with the test car, and the test car is for loading the vehicle that has the rated counter weight, and its rear axle is two 4 round structures of side, and the graceful roof beam 3 of beckmann inserts the clearance of two rear wheels of homonymy and detects, because be close to the road surface pressure point, can record comparatively accurate road resilience deflection numerical value. The platform truck 2 is a flat car, and a plurality of rollers 21 are provided on the bottom thereof to improve the mobility thereof. The Beckman beam 3 is hinged on the platform truck 2, the length between the front end and the rear end of the Beckman beam 3 and the hinged position is 2:1, the front end of the Beckman beam can be in contact with the ground to realize rebound deflection detection, the rear end of the Beckman beam 3 is provided with the dial indicator 4, a measuring head of the dial indicator 4 is in contact with the ground, and a measuring point rebound deflection value can be obtained by reading the change of the reading on the dial indicator 4.
The sliding assembly 5 comprises a sliding block 51 and a supporting rod 52, the sliding block 51 is in sliding connection with the platform truck 2, the supporting rod 52 is installed on the sliding block 51, the supporting rod is inclined forwards and forms an included angle of 10-20 degrees with the ground, and a T-shaped cross rod is arranged at one end of the supporting rod 52 and can be in contact with and jack up the Beckman beam 3. The traction assembly 6 comprises a motor 61, a contact switch 62 and a rope 63, the motor 61 is electrically connected with the contact switch 62, the contact switch 62 is arranged at the front end of the stroke of the sliding block 51 and can be contacted and triggered by the sliding block 51, two ends of the rope 63 are respectively connected to an output shaft of the motor 61 and the sliding block 51, the rope 63 is wound on a fixed pulley preset at the tail part of the connecting frame 1, and when the motor 61 is started and the rope 63 is wound, the platform truck 2 can be driven to move forwards. Specifically, the output shaft of the motor 61 may be externally connected to a winding wheel around which the rope 63 is wound, and the winding wheel may be provided with a side guard to prevent the rope 63 from leaking outside the winding wheel.
At the start of the measurement, the slider 51 is located at the rear end of its stroke, the support rod 52 is not in contact with the beckman beam 3, and the front end of the beckman beam 3 is in contact with the ground. When the coupling frame 1 is driven off the platform carriage 2, the output shaft on the motor 61 is passively rotated, the rope 63 is released, and the dial indicator 4 continuously records the value change to obtain the deflection data. When the rope 63 is completely released, the connecting frame 1 continuously runs to pull the slide block 51 to move forwards, and the support rod 52 moves along with the slide block and jacks up the Beckman beam 3, so that the Beckman beam 3 is prevented from blocking when the subsequent platform truck 2 starts to move. When the slider 51 reaches the front end of its travel and triggers the contact switch 62, the motor 61 is activated and starts winding the cable 63, and the dolly 2 gradually approaches the link 1 until it returns to the rear of the link 1. Therefore, when the multi-measuring point measurement is carried out, the experiment personnel do not need to carry equipment by manual labor, and the labor intensity of the experiment personnel can be greatly reduced.
Further, the tail part of the connecting frame 1 is further provided with a guide frame 12, referring to fig. 3, the guide frame 12 comprises two C-shaped steels 121, and the grooves of the two C-shaped steels 121 are arranged oppositely. The sliding assembly 5 further comprises a T-shaped frame 53 connected with the sliding block 51, a cross bar 531 is arranged at the end of the T-shaped frame 53, and two ends of the cross bar 531 can respectively slide into the grooves of the two C-shaped steels 121, so that the T-shaped frame 53 is connected with the guide frame 12. Specifically, to facilitate the sliding of the cross bar 531, the two C-section steels 121 are inclined downward, and the T-shaped frame 53 is hinged to the slider 51.
Furthermore, the distance between the two C-shaped steels 121 at the rear ends is greater than that between the two C-shaped steels 121 at the front ends, the rear ends of the two C-shaped steels are separated and separated, and the front ends are closed to the same distance as the cross rod 531 so as to fix the T-shaped frame 53 and prevent the two C-shaped steels from shaking left and right. That is, the two C-section steels 121 are opened obliquely at the rear end, and when the T-shaped frame 53 is deviated, the T-shaped frame 53 can be guided to enter and be connected thereto. The distance between the front ends of the two C-shaped steels 121 is equal to the length of the cross rod 531, so that the phenomenon that the cross rod 531 swings laterally after reaching the front ends of the C-shaped steels 121 is reduced.
Further, the quantity of horizontal pole 531 is two, and two horizontal poles 531 parallel arrangement each other just all can slide in the recess of C shaped steel 121, lean on with the recess of C shaped steel 121 simultaneously through two horizontal poles 531, reduce the swing of T type frame 53, and then reduce the swing of platform truck 2.
Further, the bottom of the beckmann beam 3 is provided with a stopper 31, one side of the stopper is adhered to the beckmann beam 3, the surface of the other side is wavy, two ends of the surface are protruded, the middle of the surface is sunken, and one end of the support rod 52 can slide into the concave pit through the protruded part. Therefore, after the support rod 52 jacks up the Bakerman beam 3 and slides into the pit, the Bakerman beam 3 can form a more stable support effect, and the support rod 52 is prevented from being loosened from the Bakerman beam 3 when the test vehicle is suddenly accelerated or decelerated, so that the Bakerman beam 3 is mistakenly lowered at a non-measuring point position.
Further, the sliding assembly 5 further comprises a spring 54, wherein two ends of the spring 54 are respectively connected to the slider 51 and the platform truck 2, the spring is in a stretching state, and applies a backward driving force to the slider 51, so that when the test truck is suddenly accelerated, the wire releasing speed of the output shaft of the motor 61 is not synchronous with the acceleration of the test truck, and the test truck is prevented from accelerating slower than the test truck, and further, a forward pulling force may be caused to the slider 51 through the rope 63, so that the motor 61 is started at a wrong time to take up wires.
Further, this road resilience deflection detection device based on the graceful roof beam method of beckman still includes cortex connecting band 7, and its both ends are connected to the rear end of the graceful roof beam 3 of beckman and the gauge head of percentage table 4 respectively, and its pad is in the below of gauge head, and the ground friction causes the damage to the gauge head when preventing that platform truck 2 from removing.
Further, the percentage table 4 is a digital display percentage table, and the display screen is used for reading and displaying, so that data recording is facilitated, and the reading accuracy can be improved.
Further, this road resilience deflection detection device based on the graceful roof beam method of beckman still includes numerical control equipment 8, and it is connected with the digital display percentage table electricity, can directly acquire measured data and take notes, makes things convenient for the later stage to carry out unified processing to the measured data of a plurality of measurement stations, promotes data processing's efficiency. Specifically, the numerical control device 8 is fixed at the rear end of the Beckman beam 3 and is connected with a digital display dial indicator through a data connecting line, programming software on a computer is used for reading the data of the dial indicator every 0.1s and storing the data, and meanwhile, the deflection value is analyzed and calculated. When the test vehicle reaches the position of the measuring point, the stop state lasts for at least 5s, and the dial indicator does not change at the moment and can be used as a starting point for calculating and extracting data by program software. The test vehicle is started, the dial indicator data are changed in the advancing process until the test vehicle leaves the measuring point for 3m, the time is generally 0.5min, the software program is set to analyze and record the data within 0.5min, the minimum value and the maximum value are extracted, and then the calculation and the storage are carried out according to the standard. Before each detection, the initial terminal pile number of the detected road section is input on the numerical control device 8, then the detection is carried out once every 20m in sequence, and the code number of the data is given as the product of the initial pile number plus the detection times and 20 or the product of the terminal pile number minus the detection times and 20, and the product is used as the position pile number of the measuring point so as to be convenient for positioning.
In the embodiment of the second aspect of the invention, the method for using the device for detecting the rebound and deflection of the road based on the Beckman beam method comprises the following steps:
s1, connecting a connecting frame 1 with a test vehicle, connecting a platform vehicle 2 with the connecting frame 1 through a rope 63, specifically, enabling the rope 63 to pass around a fixed pulley 11 at the tail of the connecting frame 1, connecting one end of the rope 63 with a sliding block 51, winding a redundant rope 63 on an output shaft of a motor 61, and adjusting the position of a Beckman beam 3 to enable the front end of the Beckman beam 3 to extend into a rear wheel gap of the connecting frame 1 and enable the contact position of the Beckman beam 3 and the ground to be located at a measuring point 30-50 mm before a double rear wheel gap;
s2, sliding the sliding block 51 to the rear end of the stroke, and contacting the front end of the Beckmann beam 3 with the ground;
s3, starting the test vehicle and driving away along a straight line, keeping the vehicle speed at 4-6 km/h, driving the output shaft of the motor 61 to rotate and release the rope 63 wound on the output shaft, changing the reading of the dial indicator 4, and recording the maximum reading L1；
S4, the test vehicle drives to a position 3m away from the platform vehicle 2, the test vehicle is considered to be driven away from the detection area, the rope 63 is completely released, the reading of the dial indicator 4 tends to be stable, and the stability value L at the moment is recorded2The road bounce and deflection value L is 2 × L2-L1|；
S5, the test vehicle continues to run, the sliding block 51 is dragged to move forwards through the rope 63, the supporting rod 52 is in contact with the Beckman beam 3, and the front end of the Beckman beam 3 is jacked off the ground;
s6, the sliding block 51 moves to the front end of the stroke and triggers the contact switch 62, the motor 61 is started and winds the rope 63, and the platform truck 2 gradually approaches the connecting frame 1 until the platform truck 2 contacts the tail of the connecting frame 1;
s7, braking after the test vehicle reaches the position of the next measuring point, enabling the sliding block 51 to be abutted against the connecting frame 1 and keep relatively static, enabling the platform vehicle 2 to move forwards due to inertia, enabling the Beckman beam 3 to move forwards relative to the supporting rod 52 and finally enabling the Beckman beam 3 and the supporting rod 52 to be separated from each other, and enabling the front end of the Beckman beam 3 to be in contact with the ground again;
s8, the test vehicle continues to run, the output shaft of the motor 61 is driven to rotate, the rope 63 wound on the output shaft is released, the dial indicator 4 records the deflection change reading of the road section, and the reading mode is consistent with the steps S3-S4;
and S9, the steps are circulated, the road springback and deflection values of the multiple measuring points are obtained, and the detection is finished.
Specifically, in some embodiments, when the test vehicle travels 19 meters away from the platform vehicle 2, the rope 63 is completely released, the motor 61 is driven to start winding, and winding is completed at another measuring point 20 meters away, and detection of the next measuring point is performed. In other embodiments, when the test vehicle travels to a position 3 meters away from the platform vehicle 2, the rope 63 is completely released and starts to be taken up, the connecting frame 1 is provided with an inductive switch, the inductive switch is electrically connected with the motor 61, when the platform vehicle 2 is butted with the connecting frame 1, the inductive switch can stop the motor 61 to continue to take up the rope, and the test vehicle carries the platform vehicle 2 to the next measuring point for detection.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that the present invention is not limited to the details of the embodiments shown and described, but is capable of numerous equivalents and substitutions without departing from the spirit of the invention as set forth in the claims appended hereto.
Claims (10)
1. The utility model provides a road resilience deflection detection device based on the graceful roof beam method of beckman which characterized in that includes:
the test vehicle comprises a connecting frame (1) and a test vehicle body, wherein the connecting frame (1) is used for being mounted at the tail of the test vehicle body, and a fixed pulley (11) is arranged on the connecting frame (1);
the bottom of the platform car (2) is provided with a plurality of rollers (21);
the Berkelman beam (3) is hinged with the platform truck (2), the distance ratio of the hinged point to the front end and the rear end of the Bekelman beam (3) is 2:1, the front end of the Bekelman beam (3) can be in contact with the ground, a dial indicator (4) is installed at the rear end of the Bekelman beam (3), and a measuring head of the dial indicator (4) is in contact with the ground;
the sliding assembly (5) comprises a sliding block (51) and a supporting rod (52), the sliding block (51) is connected with the platform truck (2) in a sliding mode, the supporting rod (52) is installed on the sliding block (51), and one end of the supporting rod (52) can be in contact with the Beckman beam (3) and jacks up the Beckman beam (3);
the traction assembly (6) comprises a motor (61), a contact switch (62) and a rope (63), wherein the motor (61) is electrically connected with the contact switch (62), the contact switch (62) is arranged at the front end of the stroke of the sliding block (51) and can be triggered by the sliding block (51), the rope (63) bypasses the fixed pulley (11) and the two ends of the rope (63) are respectively connected to the output shaft of the motor (61) and the sliding block (51).
2. The device for detecting the rebound and deflection of a road based on the Beckman beam method according to claim 1, wherein: the tail part of the connecting frame (1) is also provided with a guide frame (12), the guide frame (12) comprises two C-shaped steels (121), and grooves of the two C-shaped steels (121) are oppositely arranged; the sliding assembly (5) further comprises a T-shaped frame (53), the T-shaped frame (53) is installed on the sliding block (51), a cross rod (531) is arranged at the end portion of the T-shaped frame (53), and two ends of the cross rod (531) can respectively slide into the grooves of the two C-shaped steel sections (121).
3. The device for detecting the rebound and deflection of a road based on the beckman beam method according to claim 2, wherein: the distance between the rear ends of the two C-shaped steels (121) is larger than the distance between the front ends of the two C-shaped steels (121), and the distance between the front ends of the two C-shaped steels (121) is equal to the length of the cross rod (531).
4. The device for detecting the rebound and deflection of a road based on the beckman beam method according to claim 2, wherein: the number of the cross rods (531) is two, and the two cross rods (531) are arranged in parallel and can slide into the grooves of the C-shaped steel (121).
5. The device for detecting the rebound and deflection of a road based on the Beckman beam method according to claim 1, wherein: the bottom of the Baker-man beam (3) is provided with a limiting block (31), the surface of the limiting block (31) is wavy, two ends of the limiting block protrude, the middle of the limiting block is sunken, and one end of the supporting rod (52) can slide into a pit of the limiting block (31).
6. The beckmann beam method-based road bounce and deflection detection apparatus according to claim 1, wherein: the sliding assembly (5) further comprises a spring (54), two ends of the spring (54) are respectively connected to the sliding block (51) and the platform truck (2), and the spring (54) provides a backward driving force for the sliding block (51).
7. The device for detecting the rebound and deflection of a road based on the Beckman beam method according to claim 1, wherein: the device for detecting the rebound deflection of the road based on the Beckman beam method further comprises a leather connecting belt (7), wherein two ends of the leather connecting belt (7) are respectively connected to the rear end of the Beckman beam (3) and a measuring head of the dial indicator (4).
8. The device for detecting the rebound and deflection of a road based on the Beckman beam method according to claim 1, wherein: the dial indicator (4) is a digital display dial indicator.
9. The device for detecting road rebound and deflection based on the beckman beam method according to claim 8, wherein: the device for detecting the rebound and deflection of the road based on the Bakerman beam method further comprises a numerical control device (8), wherein the numerical control device (8) is electrically connected with the digital display dial indicator and used for recording an experimental result.
10. A use method of a road springback and deflection detection device based on a Beckman beam method is characterized by comprising the following steps:
the platform truck (2) is connected with the connecting frame (1) through the rope (63), the connecting frame (1) is installed at the tail of the test truck, the redundant rope (63) is wound on an output shaft of the motor (61), and the position of the Beckman beam (3) is adjusted, so that the front end of the Beckman beam (3) can extend into a rear wheel gap of the connecting frame (1);
sliding the sliding block (51) to the rear end of the stroke, wherein the front end of the Beckman beam (3) is in contact with the ground and is positioned on a measuring point 30-50 mm in front of the gap between the double rear wheels of the test vehicle;
starting the test vehicle and driving away along a straight line, driving the output shaft of the motor (61) to rotate and release the rope (63) wound on the output shaft, continuously recording the reading by the dial indicator (4), and obtaining the maximum reading value L1；
The test vehicle runs to a distance of 3 meters from the platform vehicle (2), the rope (63) is completely released, and the stable value L of the dial indicator (4) is read2The road bounce and deflection value L is 2 × L2-L1|；
The test vehicle continues to run, the sliding block (51) is dragged to move forwards through the rope (63), the supporting rod (52) is in contact with the Beckman beam (3) and pushes the front end of the Beckman beam (3) away from the ground;
the sliding block (51) moves to the front end of the stroke and triggers the contact switch (62), the motor (61) is started and winds and recovers the rope (63), and the platform truck (2) gradually approaches the connecting frame (1) until the platform truck (2) contacts the tail part of the connecting frame (1);
the test vehicle brakes, the sliding block (51) and the connecting frame (1) are relatively static, the platform vehicle (2) moves forwards due to inertia, the Beckman beam (3) moves forwards relative to the supporting rod (52), the front end of the Beckman beam (3) is in contact with the ground again, the contact switch (62) is separated from contact with the sliding block (51), and the contact switch (62) is reset;
the test vehicle continues to run, the output shaft of the motor (61) is driven to rotate and the rope (63) wound on the output shaft is released, and the dial indicator (4) records the deflection change reading of the road section;
and (4) circulating the steps to obtain the road rebound deflection values of the plurality of measuring points, and finishing the detection.
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