Strip type load cell asphalt pavement structure

Abstract

This patent application provides a strip-type weighing sensor asphalt pavement paving structure, which is paved in the base groove of the asphalt pavement, and includes a strip-type weighing sensor and an isolation mounting frame for the sensor. The isolation mounting frame is composed of two parallel grooved steels with opposite grooves, and the outer side of the grooved steel is provided with anchoring steel bars for anchoring in the concrete in the base groove. The strip-type weighing sensor is fixed in the groove space between the two grooved steel grooves by epoxy resin glue, and the upper surface of the strip-type weighing sensor is flush with the top surface of the grooved steel and the asphalt pavement. This technical solution overcomes the occurrence of damage, breakage and even structural sinking, has a long service life, and has a good shock absorption effect, which improves the measurement accuracy of the strip-type weighing sensor.

Description

Technical Field

[0001] The present patent application relates to a road surface installation structure for intelligent traffic detection sensing devices, and in particular to a road surface installation structure for weighing sensors that provide real-time axle load information of traffic vehicles to an intelligent traffic monitoring system. Background Art

[0002] The bar-type weighing sensor is an important sensing detection device installed on the road surface to transmit the dynamic information of the wheel axle load of the moving vehicle in real time. It provides axle load, weighing and related measurement signals for the intelligent traffic volume monitoring system. It is organically combined with the off-site law enforcement system to implement all-weather road operation overload monitoring and related information collection for moving vehicles, especially freight vehicles, and provide a new law enforcement model and technical support for the traffic management department to manage illegal overloading of trucks and global traffic policy planning, so as to effectively reduce traffic accidents and damage to roads and bridges caused by vehicle overloading, and implement effective management policies.

[0003] The current construction method of the road pavement of strip type weighing sensor is mainly: dig a section of installation groove downward on the asphalt pavement, implement concrete hardening in the installation groove and the asphalt road body, cut a groove on the concrete, and pour epoxy resin glue into the groove to fill the fixed strip type weighing sensor and its wire. The pavement installation structure is a direct combination of the road surface, concrete, and epoxy resin glue to fix the strip type weighing sensor, but the properties of the asphalt pavement, epoxy resin glue, and concrete materials are very different, especially the curing stress, post-curing stress, and temperature change stress of epoxy resin are different from those of concrete. In addition, due to the large difference in elastic modulus between concrete and epoxy resin glue, and the complex working state of frequent rolling of vehicles in the traffic channel, the pavement pavement structure and the road surface and itself will soon have problems such as fracture, damage, and sinking, and the service life is short, and there is no way to talk about the accuracy of weighing detection; secondly, the overall pavement structure has poor shock absorption capacity, which generates additional stress on the weighing sensor, greatly affecting its detection accuracy; thirdly, the existing pavement installation structure takes a long time to construct, has a high operating cost, a high breakage rate, a short service life, and a large amount of maintenance construction work. Summary of the invention

[0004] The invention purpose of this patent application is to solve the technical problems existing in the existing road paving installation structure of strip-type weighing sensors, and to provide an asphalt pavement paving structure of strip-type weighing sensors, which improves the organic combination performance of the paving structure of the strip-type weighing sensors and the paved road surface, greatly prolongs the service life of its paving structure, and the overall paving structure provides good shock absorption for the weighing sensor, avoiding negative impact on its detection accuracy.

[0005] The technical solution of the strip-type weighing sensor asphalt pavement paving structure provided in the present patent application has the following main technical contents: a strip-type weighing sensor asphalt pavement paving structure, which is paved in the base trench of the asphalt pavement, and the paving structure comprises a strip-type weighing sensor and an isolation mounting frame of the sensor, the isolation mounting frame is composed of two parallel grooved steels with opposite grooves fixedly connected, the groove spacing of the two grooved steels is larger than the width of the strip-type weighing sensor, the outer sides of the two grooved steels are provided with anchoring steel bars for anchoring in the concrete in the base trench, the strip-type weighing sensor is fixed in the groove space between the two grooved steel grooves by filling with epoxy resin glue, and the upper surface of the strip-type weighing sensor is flush with the top surface of the grooved steel and the asphalt pavement.

[0006] One of the preferred technical means of the above-mentioned overall technical solution is to enhance the bonding performance between the road surface and the isolation mounting frame and to offset the influence of the vibration of the moving vehicle on the measurement accuracy of the weighing sensor as much as possible. The anchor steel bars are a number of equally spaced, symmetrically and laterally fixed U-shaped anchor steel bars on the outside of the two groove steels.

[0007] One of the preferred technical means of the above-mentioned overall technical solution is to improve the shock-absorbing effect of the paving structure and enhance the shock-absorbing protection of the strip-type weighing sensor. Its composition also includes a pre-embedded steel cage, and the isolation mounting frame is fixed on the upper part of the pre-embedded steel cage. The pre-embedded steel cage is filled and buried in the concrete of the foundation trench.

[0008] One of the preferred technical means of the above-mentioned overall technical solution is that the width of the embedded steel cage is greater than the maximum width of the isolation mounting frame including the anchoring steel bars.

[0009] The technical scheme of the asphalt pavement paving structure of strip-type weighing sensors disclosed in the present patent application, the strip-type weighing sensors are isolated in the groove cavity between two opposite grooved steels filled with epoxy resin glue, and the grooved steel and the pavement are bonded by concrete. The technical scheme overcomes the technical problem of direct bonding of concrete and epoxy resin glue in the original installation arrangement structure, so that there is excellent bonding performance between its components and filling materials, and between the filling materials and the pavement, thereby avoiding the large performance difference between concrete and epoxy resin glue materials that quickly leads to damage, fracture and even structural sinking at the joint, greatly extending the service life, greatly reducing the subsequent repair, maintenance operations and cost investment, and more importantly, the paving structure provides a good shock-absorbing effect for the strip-type weighing sensors, reducing the influence of the frequent rolling load vibration of moving vehicles on the measurement accuracy of the strip-type weighing sensors. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is the laying structure diagram of this patent application.

[0011] Figure 2 , Figure 3 They are cross-sectional views of two embodiments of the isolation mounting frame.

[0012] Figure 4 It is a three-dimensional structural diagram with the bottom surface of the isolation mounting frame on top.

[0013] Figure 5 This is a three-dimensional structural diagram of the embedded steel cage. DETAILED DESCRIPTION

[0014] The strip type weighing sensor asphalt pavement paving structure disclosed in this patent application is a paving structure in the asphalt pavement base trench 2. Figure 1 As shown, its main components include a bar-type weighing sensor 7 and an isolation mounting frame 9 for the sensor.

[0015] The isolation mounting frame 9 is composed of two parallel grooved steels 10 with opposite grooves, fixed by a connecting rod 13 at the bottom. A groove space 12 extending in the length direction is formed between the two grooved steels 10 for fixing and filling the strip-type weighing sensor 7. The groove spacing a of the groove space 12 is greater than the width of the strip-type weighing sensor 7. Anchor steel bars for anchoring in the poured concrete are fixed on the outside of the two grooved steels 10. Figure 2 As shown, the bottom ends of the two channel steels 10 are formed with a flat base together with the steel to improve their stability when buried in the foundation trench 2; in order to improve the firmness of the connection, the grooves of the two channel steels 10 are provided with anchor beams 15 extending into the groove space 12.

[0016] The channel steel 10 is a hot-rolled integrally formed steel, and rails, expansion joint steels, etc. can also be used as the channel steel.

[0017] The laying steps of its laying structure are:

[0018] ①. Avoid curves, ups and downs, and dig the foundation trench 2 on a straight road surface that is not less than 200-400 meters before and after the road surface. Rinse the foundation trench 2 with clean water and blow it dry with a blower;

[0019] ②. Fix the isolation mounting frame 9 below the transverse wooden beam, and make the top surface 14 of the groove steel flush with the bottom surface of the transverse wooden beam. The transverse wooden beam falls on the asphalt pavement 1, so that the isolation mounting frame 9 is suspended in the center of the base trench 2, shielding the notch of the isolation mounting frame 9, and pouring concrete 6 in the base trench 2 outside the isolation mounting frame 9. After the concrete 6 is densely solidified, the anchor steel bars of the isolation mounting frame 9 are anchored in the concrete 6, and the top surface 14 of the groove steel is flush with the asphalt pavement 1;

[0020] ③. Still using the above-mentioned method of erecting transverse wooden beams, place the two ends of the strip-type weighing sensor 7 on the two transverse wooden beams respectively, suspend it in the center of the slot space 12 of the isolation mounting frame 9, and preferably make the upper surface of the strip-type weighing sensor 7 higher than the top surface 14 of the groove steel by about 1-3 mm, and pour epoxy resin glue 8 into the slot space 12 around the strip-type weighing sensor 7. During the glue pouring, vibrate and tamp the strip-type weighing sensor 7 and pressurize it to prevent it from floating up and moving; after the epoxy resin glue 8 reaches the curing strength, remove the transverse wooden beams, and use a water-polishing machine to grind off the part of the strip-type weighing sensor 7 that is higher than the top surface 14 of the groove steel to make it flush with the asphalt pavement 1, and complete the paving and installation.

[0021] Figure 1 The present invention shows another embodiment of the present paving structure, which also includes a pre-embedded steel cage 4. The pre-embedded steel cage 4 is as shown in FIG. Figure 5 As shown, it is a three-dimensional rectangular frame made of steel bar materials such as threaded steel, whose length is the same as or slightly less than the length of the base trench 2, and the width of the embedded steel cage 4 is not less than the maximum width of the isolation mounting frame 9 including the anchoring steel bars. The isolation mounting frame 9 is fixed on the embedded steel cage 4.

[0022] In order to enhance the bonding degree between the isolation mounting frame 9 and the concrete 6 cast in the foundation trench 2 and to offset the influence of the vehicle running vibration on the measurement accuracy of the weighing sensor as much as possible, Figure 4 As shown, the anchoring steel bars on the outside of the two channel steels 10 are a number of U-shaped anchoring steel bars 11 that are equally spaced and laterally symmetrically fixed on the outside of the two channel steels 10 and are bent in a U shape. After the overall laying is completed, the strip-type weighing sensor 7 is combined with the channel steel 10 by the epoxy resin glue 8. The isolation mounting frame 9 serves as an isolation bonding piece between the epoxy resin glue combining the strip-type weighing sensor 7 and the external concrete combining the asphalt pavement 1. The laying fixation and the ability to bear frequent large axle loads are greatly improved, the service life is extended, and the difference in performance between the epoxy resin glue and the concrete, especially the mutual stress influence due to the different elastic modulus, is avoided. In addition, the setting of the U-shaped anchoring steel bars 11 and the bottom embedded steel cage 4 greatly improves the overall shock absorption effect and greatly improves the detection accuracy of the strip-type weighing sensor 7.

[0023] The laying steps of the laying structure of this embodiment are:

[0024] ①. Avoid curves, ups and downs, and dig the foundation trench 2 on a straight road surface that is not less than 200-400 meters before and after the road surface. Rinse the foundation trench 2 with clean water and blow it dry with a blower;

[0025] ②. Several pairs of vertical steel bars 3 are driven into the bottom of the foundation trench 2 according to the width of the embedded steel cage 4. The embedded steel cage 4 is lowered into the foundation trench 2 and welded to the vertical steel bars 3. The isolation mounting frame 9 is fixed directly above the embedded steel cage 4. At this time, the top surface 14 of the channel steel is flush with the asphalt pavement 1. In order to prevent foreign matter from entering the slot space 12, the slot of the isolation mounting frame 9 needs to be blocked;

[0026] ③. Pour concrete 6 into the base trench 2 outside the isolation mounting frame 9, so that the concrete 6 is densely filled with the embedded steel cage 4 and the isolation mounting frame 9 of the U-shaped anchor steel bar 11, until the concrete 6 is flush with the asphalt pavement 1;

[0027] ④. Approach both ends of the strip-type weighing sensor 7 and suspend the strip-type weighing sensor 7 with a horizontal wooden beam. Suspend the strip-type weighing sensor 7 in the center of the slot space 12 of the isolation mounting frame 9. It is best to make the top surface of the strip-type weighing sensor 7 higher than the top surface 14 of the groove steel by about 1 to 3 mm. Pour epoxy resin glue 8 into the slot space 12 around the strip-type weighing sensor 7. Vibrate and pressurize the strip-type weighing sensor 7 during the glue pouring to prevent it from floating up and moving. After the epoxy resin glue reaches the curing strength, remove the horizontal wooden beam and use a water polisher to grind off the part of the strip-type weighing sensor 7 that is higher than the top surface 14 of the groove steel to make it flush with the asphalt pavement 1 to complete the paving and installation.

Claims

1. A strip type weighing sensor asphalt pavement paving structure, paved in a base trench (2) of an asphalt pavement, characterized in that: The pavement structure comprises a strip-type weighing sensor (7) and an isolation mounting frame (9) for the sensor, wherein the isolation mounting frame (9) is formed by fixedly connecting two parallel grooved steels (10) with grooves facing each other, the groove spacing of the two grooved steels (10) being greater than the width of the strip-type weighing sensor, and anchoring steel bars for anchoring in concrete (6) in a foundation groove are provided on the outer sides of the two grooved steels (10), and the strip-type weighing sensor (7) is fixed in the groove space (12) between the two grooved steel grooves by epoxy resin glue (8), and the upper surface of the strip-type weighing sensor (7) is flush with the top surface (14) of the grooved steel and the asphalt pavement (1); The anchoring steel bars are a plurality of equally spaced, symmetrically fixed transversely disposed U-shaped bent anchoring steel bars (11) on the outside of the two grooved steels (10); The notches of the two channel-shaped steels (10) are provided with anchor beams (15) extending into the notch spaces (12).

2. The strip type weighing sensor asphalt pavement paving structure according to claim 1 is characterized in that: The bottom ends of the two channel steels (10) are integrally formed with the steels to form a flat base.

3. The strip type weighing sensor asphalt pavement paving structure according to claim 1 or 2, characterized in that: The structure also includes a pre-buried steel cage (4), an isolation mounting frame (9) is fixed on the upper part of the pre-buried steel cage (4), and the pre-buried steel cage (4) is filled and buried in the concrete (6) of the foundation trench (2).

4. The strip type weighing sensor asphalt pavement paving structure according to claim 3 is characterized in that: The width of the embedded steel bar cage (4) is greater than the maximum width of the isolation mounting frame (9) containing the anchoring steel bars.

5. The strip type weighing sensor asphalt pavement paving structure according to claim 3 is characterized in that: A plurality of pairs of vertical steel bars (3) are driven into the bottom of the foundation trench (2) according to the width of the embedded steel bar cage (4), and the embedded steel bar cage (4) is fixedly welded and connected to the vertical steel bars (3) in the foundation trench (2).

6. The strip type weighing sensor asphalt pavement paving structure according to claim 1 is characterized in that: The channel steel (10) is a steel rail or an expansion joint steel.

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