Asphalt pavement paving construction wire hanging device and method

Abstract

The present invention provides a wire hanging device and method for asphalt pavement paving construction, wherein the device comprises a slot-type clamp, which is used to snap onto the curbstone of the road surface to be paved with its opening downward; wherein a vertical steel bar is arranged on the back of the slot-type clamp; a transverse steel bar is arranged on the vertical steel bar, and the tail end of the transverse steel bar is fastened to the vertical steel bar through a fixing frame and a double-ear fastening bolt; and a wire hanging device is welded to the front end of the transverse steel bar, and an arc-shaped notch is arranged on the upper part of the wire hanging device. The present invention can not only simplify the wire hanging process, but also effectively improve the road surface construction quality, avoid small waves on the asphalt road surface, ensure the paving thickness, and improve the flatness of the asphalt road surface.

Description

Technical Field

[0001] The present invention relates to the technical field of construction tools and construction setting-out, and more specifically, to a construction line hanging device and method for asphalt pavement paving. Background Art

[0002] Asphalt pavement construction on modern highways and urban roads is all constructed by modern large-scale pavers. Whether it is the drainage pile base layer of the road or the asphalt middle surface layer or lower layer, piles are nailed longitudinally on both sides of the route, and steel wires are hung as elevation control reference wires. The sensor of the paver is lightly touched on the elevation control reference wire and slid forward. The elevation, flatness and cross slope are controlled by walking on the elevation control reference wire, which is commonly known as the "tightrope walking" method. The traditional "tightrope walking" method is to use longitudinal nailing piles every 5 to 10 meters, and use a tie wire to directly tie the steel wire to the steel bar nail pile. The paver's sensor moves forward along the steel wire to pave the road surface. Usually, Φ2-3mm steel wire is used as the baseline. The two ends of the steel wire are connected to the steel bar piles. The two ends are equipped with rope tighteners and force gauges. The tensioning length is preferably 100 to 200m, and the rope tighteners must be used at both ends to simultaneously tighten the rope to avoid deflection due to loose steel wire ropes. The tensioning force is 1KN.

[0003] The steel chisels supporting the steel wire rope are made of Φ16-18 round steel bars with greater rigidity and equipped with a fixing frame. The fixing frame uses threads for easy disassembly and adjustment of elevation; the spacing between the steel chisels is generally 5-10m (not longer than 10m for a straight line and not longer than 5m for a curve). The steel chisels are set 30 to 40cm away from the paving width. The elevation is controlled by steel wire on both the inside and outside of the road, and the elevation error is controlled within (-2mm, +5mm). The steel chisels must be buried firmly and should be supervised by a dedicated person during the entire operation. It is strictly forbidden to move the steel chisels crookedly. If any abnormality is found, it must be restored immediately. The surveying personnel keep a close eye on the construction site and often use a level to check the steel wire elevation.

[0004] At present, the front end of the crossbar of the existing steel wire fixing frame has only one wire hanging slot, which is fixed with thin iron wire or tied with hemp rope. It is often disturbed by the outside world and becomes off-line, resulting in errors in paving height or thickness. In addition, the long steel wire will fatigue under tension, and the common phenomenon of tightness in the early stage and looseness in the later stage will occur. The steel wire between every two steel bars will have different degrees of deflection, which will cause small waves on the paved asphalt pavement or water-stable base, seriously affecting the flatness of the road surface.

[0005] In view of this, the prior art should be improved to solve the above-mentioned problems existing in the prior art. Summary of the invention

[0006] In view of the above problems, an object of the present invention is to provide a wire hanging device and a wire hanging method which can be easily erected and can effectively prevent fatigue relaxation of the wire rope from forming a middle deflection.

[0007] According to one aspect of the present invention, there is provided a wire hanging device for asphalt pavement paving construction, comprising a slot-shaped clamp, the slot-shaped clamp being used to be snapped onto a curbstone of a road surface to be paved with its opening downward; wherein:

[0008] A vertical steel bar is arranged on the back of the slot-shaped fixture;

[0009] A transverse steel bar is arranged on the vertical steel bar, and the tail end of the transverse steel bar is fastened and connected to the vertical steel bar through a fixing frame and a double-ear fastening bolt; and,

[0010] A wire hanger is welded at the front end of the transverse steel bar, and an arc-shaped notch is arranged on the upper part of the wire hanger.

[0011] Preferably, a thin screw bolt is arranged on one side of the front end of the wire hanger close to the arc-shaped slot, and the front end of the thin screw bolt is hinged to the steel arc-shaped wire buckle arranged in the arc-shaped slot.

[0012] Preferably, the diameter of the arc-shaped notch is Φ3-4 mm.

[0013] Preferably, the fixing frame is a cylindrical fixing frame; and a vertical hole perpendicular to the direction of the transverse steel bars is provided in the middle position of the frame body of the fixing frame, the vertical hole is used for the vertical steel bars to pass through, and the transverse steel bars can move up and down along the vertical steel bars; the screw of the double-ear fastening bolt penetrates one side of the frame body of the fixing frame to the vertical hole.

[0014] Preferably, the fastening direction of the double-ear fastening bolt is in the same straight line as the center axis of the transverse steel bar.

[0015] Preferably, the slot-type clamp is a channel steel; the vertical steel bars are vertically welded and fixed on the back plate of the channel steel.

[0016] Preferably, a fastening bolt penetrating a side plate of the channel steel is provided on one side of the channel steel for fixing the channel steel on the curbstone.

[0017] Preferably, the vertical steel bars and the transverse steel bars are both plain round steel bars.

[0018] According to another aspect of the present invention, a method for hanging wires during asphalt pavement paving construction is provided, wherein the aforementioned hanging wire device is used to hang wires during asphalt pavement paving construction, and the method comprises:

[0019] Installing the asphalt pavement paving construction wire hanging device on the curb;

[0020] measuring the elevation and marking the vertical reinforcement;

[0021] Adjust the elevation of the transverse reinforcement so that the elevation of the layout is consistent with the marking of the vertical reinforcement;

[0022] Tighten the double-ear fastening bolts on the fixing frame to fix the transverse steel bars;

[0023] Putting a steel wire rope with rope tighteners connected at both ends into the arc-shaped notch of the wire hanger;

[0024] Tensioning the steel wire rope by using the handle of the rope tightener so that the tension of the steel wire rope is maintained at a preset tension value;

[0025] The elevation of the steel wire rope on the wire hanger is remeasured, and the fixing frame is fine-tuned so that the elevation of the steel wire rope is accurately adjusted to a specified value.

[0026] Preferably, after fine-tuning the fixing frame so that the elevation of the steel wire rope is accurately adjusted to a specified value, the method further comprises:

[0027] Tighten the thin screw bolt arranged on one side of the front end of the wire hanger close to the arc-shaped notch to fasten the wire rope.

[0028] By means of the asphalt pavement paving construction hanging wire device and method provided by the present invention, the hanging wire device can be directly clipped and fixed on the curbstone, which is convenient for construction and can effectively avoid the problem of the reference line falling off or generating deflection causing the elevation error of the pavement or causing the final flatness of the pavement to be poor.

[0029] In order to achieve the above and related purposes, one or more aspects of the present invention include features that will be described in detail later and are particularly pointed out in the claims. The following description and the accompanying drawings describe some exemplary aspects of the present invention in detail. However, these aspects indicate only some of the various ways in which the principles of the present invention can be used. In addition, the present invention is intended to include all of these aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] By referring to the following description and claims in conjunction with the accompanying drawings, and with a more comprehensive understanding of the present invention, other objects and results of the present invention will become more apparent and easier to understand. In the accompanying drawings:

[0031] Figure 1 This is a schematic diagram of the structure of a wire hanging device for asphalt pavement paving construction according to an embodiment of the present invention;

[0032] Figure 2 is a cross-sectional view of a wire hanger in a non-working state according to an embodiment of the present invention;

[0033] Figure 3 is a cross-sectional view of a wire hanger according to an embodiment of the present invention in a working state;

[0034] Figure 4 is a schematic diagram of an arc line buckle according to an embodiment of the present invention;

[0035] Figure 5 is a cross-sectional view of a cross bar with a fixing frame and a double-ear fastening bolt according to an embodiment of the present invention;

[0036] Figure 6 The present invention is a schematic diagram of the construction process flow of a wire hanging method for asphalt pavement paving construction according to an embodiment of the present invention.

[0037] The same reference numerals throughout the drawings indicate similar or corresponding features or functions. DETAILED DESCRIPTION

[0038] In the following description, for the purpose of illustration, in order to provide a comprehensive understanding of one or more embodiments, many specific details are set forth. However, it is apparent that these embodiments may also be implemented without these specific details. In other examples, for ease of describing one or more embodiments, known structures and devices are shown in the form of block diagrams.

[0039] The invention provides a wire hanging device for asphalt pavement paving construction, which aims to prevent a reference line from falling off or generating deflection, thereby causing an error in pavement elevation or causing the final flatness of the pavement to be poor or even unqualified.

[0040] Figure 1 This is a schematic diagram of the structure of the asphalt pavement paving construction wire hanging device according to an embodiment of the present invention. Figure 1 As shown, the wire hanging device for asphalt pavement paving construction provided by the present invention comprises a slot-shaped fixture 110, which can be opened downward and buckled on the curbstone 200 of the road to be paved, and a vertical steel bar 120 is fixedly arranged on the back of the bottom plate of the slot-shaped fixture, and the vertical steel bar 120 is perpendicular to the bottom plate of the slot-shaped fixture 110. A transverse steel bar 130 is vertically arranged on the vertical steel bar 120, and the tail end of the transverse steel bar 130 is fastened to the vertical steel bar 120 through a fixing frame 140 and a double-ear fastening bolt 150. A wire hanging device 160 is arranged at the front end of the transverse steel bar 130, and a steel wire rope 170 for hanging is erected on the wire hanging device 160.

[0041] Figure 2 and Figure 3 sectional views of a wire hanger in a non-working state and a working state according to an embodiment of the present invention are shown respectively, Figure 4 Schematic diagram of an arc-shaped buckle according to an embodiment of the present invention.

[0042] like Figures 2 to 4As shown in the figure, an arc-shaped notch 161 is provided at the upper part of the wire hanger 160 to accommodate the wire rope for hanging the wire. In order to prevent the wire rope from fatigue and relaxation over time to form a middle deflection, and to ensure that the elevation of the paver operation in each section is accurate and correct, a thin screw bolt 162 is installed at the upper front end of the wire hanger 160, and a steel arc-shaped wire buckle 163 is hinged at the front end of the thin screw bolt 162. Tightening the thin screw bolt 162 can make the arc-shaped wire buckle 163 tightly buckle the wire rope 170 in the arc-shaped notch 161, so that the tensioned wire rope 170 is stuck. In addition, the stuck wire rope can also effectively prevent operators and pedestrians from knocking off the hanging wire, causing unnecessary shutdowns or accidents.

[0043] In this embodiment, the wire hanger is cylindrical, and the diameter of the arc-shaped slot 161 is Φ3-4 mm, which can be determined according to the diameter of the wire rope used in the on-site construction. According to conventional construction experience, the diameter of the arc-shaped slot is preferably Φ3 mm.

[0044] In addition, in order to prevent the wire rope from slipping out of the arc-shaped slot, the slot center angle of the arc-shaped slot (the opening angle of the slot) should be less than 180 degrees, preferably less than 120 degrees.

[0045] The transverse steel bar can be fixed to the tail end of the wire hanger by welding, or can be fixed by mutually adapted clip-on and slot structures, or can be fixed by bolts.

[0046] Figure 5 Detailed description of the invention The figure is a cross-sectional view of a cross bar with a fixing bracket and a double-ear fastening bolt according to an embodiment of the present invention.

[0047] like Figure 5 As shown, the fixing frame in this embodiment is a cylindrical fixing frame, and a rectangular fixing frame can also be selected as needed. A vertical hole 141 perpendicular to the direction of the transverse reinforcement 130 is provided in the middle position of the frame body of the fixing frame 140, and the vertical hole 141 is used to allow the vertical reinforcement to pass through. Through the vertical hole 141, the transverse reinforcement 130 can move up and down along the vertical reinforcement to adjust the hanging line elevation. In order to locate the position of the transverse reinforcement on the vertical reinforcement, the screw of the double-ear fastening bolt 150 penetrates one side of the frame body of the fixing frame 140 to the vertical hole 141 and then presses against the vertical reinforcement in the vertical hole 141. Preferably, the fastening direction of the double-ear fastening bolt is in the same straight line as the central axis of the transverse reinforcement to ensure that the fixing frame is firmly fixed.

[0048] In a specific embodiment of the present invention, the transverse reinforcement is made of plain round reinforcement with high rigidity, and the fixing frame body can be welded and fixed to one end of the transverse reinforcement.

[0049] The slot clamp can be made of channel steel of a certain specification, and the vertical steel bars are vertically welded and fixed on the back plate of the channel steel. In addition, in order to fix the slot clamp more firmly on the curb, fastening bolts penetrating the side plates can be set on one or both sides of the side plates of the channel steel. After the opening of the channel steel is stuck on the curb stone, the channel steel can be firmly fixed on the curb stone by tightening the fastening bolts.

[0050] In order to ensure that the hanging wire does not deform after being tensioned, the vertical steel bars can be made of round steel bars with greater rigidity.

[0051] It can be seen from the above description that the shoulder soil of the highway is not firm, which can easily cause the steel bar to be skewed. Therefore, the existing steel bar fixing and hanging method can easily cause the baseline error. The present invention provides a hanging device for asphalt pavement paving construction, which does not need to bury the steel bar in the roadbed, but uses a more stable curb to fix the hanging device. The hanging device can hang the line 30 to 40 cm to the left or right of the curb in the forward direction. It is not only stable, but also enables the asphalt pavement to be paved to the edge at one time. In addition, since the device hangs the line firmly, it can also save the energy of some caregivers and elevation re-measurement personnel.

[0052] On the other hand, the present invention also provides a method for hanging wires during asphalt pavement paving construction, which utilizes the aforementioned hanging wire device to carry out the hanging wires during asphalt pavement paving construction. Figure 6 The construction process flow of the asphalt pavement paving construction hanging line method according to an embodiment of the present invention is shown.

[0053] like Figure 6 As shown, the asphalt pavement paving construction hanging line method provided by the present invention comprises:

[0054] S610: Install the asphalt pavement paving construction hanging wire device on the curb;

[0055] S620: Measure elevations and mark vertical reinforcements;

[0056] S630: Adjust the elevation of the transverse reinforcement so that the elevation of the layout is consistent with the marking of the vertical reinforcement;

[0057] S640: Tighten the double-ear fastening bolts on the fixing frame to fix the transverse reinforcement;

[0058] S650: Place the wire rope with rope tighteners at both ends into the arc-shaped notch of the wire hanger;

[0059] S660: tensioning the wire rope through the handle of the rope tensioner so that the tension of the wire rope is maintained at a preset tension value;

[0060] S670: Re-measure the elevation of the wire rope on the wire hanger and fine-tune the fixing frame to make the elevation of the wire rope accurate to the specified value.

[0061] Among them, in the process of installing the asphalt pavement paving construction hanging line device on the curb, in order to fix the slot clamp more firmly on the curb, after the channel steel opening is stuck downward on the curb, the channel steel can be firmly fixed on the curb by tightening the fixing bolts.

[0062] In addition, in order to better tighten the wire rope, after fine-tuning the fixing frame so that the elevation of the wire rope is accurately adjusted to the specified value, it is also necessary to tighten a thin screw bolt arranged on the side of the front end of the wire hanger close to the arc-shaped slot to more firmly fasten the wire rope in the arc-shaped slot of the wire hanger.

[0063] The above technical solution of the present invention will be described in more detail below in conjunction with a specific construction example.

[0064] The construction section of this construction example is a straight section. The wire hanging device is installed on the curb every 10m. The size of the curb is 900*330*150mm. The groove clamp of the wire hanging device adopts 20# channel steel, 200mm long, the vertical steel bars adopt Φ18 round steel, 400mm high, and the horizontal steel bars adopt Φ16 round steel, 300mm long. The bottom of the vertical steel bars is welded and fixed to the center of the back plate of the channel steel. The welding adopts phosphorus difluoride shielded welding, and the weld foot height is 4mm.

[0065] The fixing frame is a steel ring with a length of 80mm, an inner diameter of Φ18mm and an outer diameter of Φ60mm. The fixing frame is made of Q235 steel. The wire hanger is made of a smooth round steel bar with a diameter of Φ25mm, a length of 30mm, and is coaxially welded with the transverse steel bar. An arc-shaped slot with a diameter of Φ4mm is opened in the middle position just above the wire hanger. The arc-shaped slot is used to accommodate the steel wire rope for hanging the wire.

[0066] A small hole with a diameter of Φ2mm is opened on the side wall corresponding to the arc-shaped slot above the end of the wire hanger to allow a thin screw bolt to pass through. The thin screw bolt has a diameter of Φ2mm and a length of 20mm and is used as a tensioning wire bolt for the hanging wire rope. A steel arc-shaped wire buckle (arc-shaped) is hinged at the end of the screw of the thin screw bolt to tighten the wire rope accommodated in the arc-shaped slot.

[0067] The length of the hanging wire rope is 200m. Both ends are connected to steel piles with a diameter of 32mm through a rope tightener. The hanging device is installed on the curb every 10 meters, and the elevation of the hanging point of the device is measured (pavement design elevation + sensor height). The transverse steel bars are adjusted to make the elevation of the hanging device consistent with the elevation of the measuring point. The double-ear fastening bolts are tightened to fix the fixing frame. At the same time, the rope tighteners at both ends of the wire rope are operated to make the tension force 1KN. The tension value can be read from the dynamometer of the rope tightener. The elevation of the wire rope at the hanging device is remeasured again to control the error of the remeasured data within ±1mm. If it exceeds 1mm, the fixing frame is adjusted to ensure the accuracy of the elevation of each point.

[0068] After the elevation measurement is determined, tighten the fine screw bolt at the end of the wire hanger to lock the arc-shaped wire buckle into the wire rope. After the laying-out work on both sides of the road surface is completed at the same time, start paving asphalt or mixture. The paver's sensor checks the elevation of each point while walking on the tightrope. At the same time, the laying-out work of the first 200m or so section is carried out to ensure that the paver paves continuously, evenly and uninterruptedly.

[0069] After the first 200m construction section is paved, immediately loosen the rope tighteners at both ends, release the buckles of each wire hanging device, and retract each wire hanging device to the front section for wire laying. This process is repeated alternately until the daily working surface construction is completed.

[0070] Through the above specific implementation examples, it can be seen that the use of the asphalt pavement paving construction hanging line device and method provided by the present invention not only simplifies the hanging line process, but also can effectively improve the pavement construction quality, avoid small waves in the asphalt pavement, ensure the paving thickness, prevent the poor flatness of the lower layer of the pavement structure layer from being "copied" to the upper layer, and improve the final flatness of the pavement.

[0071] As described above, the asphalt pavement paving construction wire hanging device and method according to the present invention are described by way of example with reference to the accompanying drawings. However, those skilled in the art should understand that various improvements can be made to the asphalt pavement paving construction wire hanging device and method proposed by the present invention without departing from the content of the present invention. Therefore, the protection scope of the present invention should be determined by the content of the attached claims.

Claims

1. A method for hanging wires for asphalt pavement paving construction, using an asphalt pavement paving construction hanging wire device for asphalt pavement paving construction hanging wire device, the asphalt pavement paving construction hanging wire device comprising a slot-shaped clamp, the slot-shaped clamp is used to be buckled on the curbstone of the road surface to be paved with its opening downward; wherein, A vertical steel bar is arranged on the back of the slot-shaped fixture; A transverse steel bar is arranged on the vertical steel bar, and the tail end of the transverse steel bar is fastened and connected to the vertical steel bar through a fixing frame and a double-ear fastening bolt; and, A wire hanger is welded at the front end of the transverse steel bar, and an arc-shaped notch is arranged on the upper part of the wire hanger; The method comprises: Installing the asphalt pavement paving construction wire hanging device on the curb; measuring the elevation and marking the vertical reinforcement; Adjust the elevation of the transverse reinforcement so that the elevation of the layout is consistent with the marking of the vertical reinforcement; Tighten the double-ear fastening bolts on the fixing frame to fix the transverse reinforcement; Putting a steel wire rope with rope tighteners connected at both ends into the arc-shaped notch of the wire hanger; Tensioning the steel wire rope by using the handle of the rope tightener so that the tension of the steel wire rope is maintained at a preset tension value; The elevation of the steel wire rope on the wire hanger is remeasured, and the fixing frame is fine-tuned so that the elevation of the steel wire rope is accurately adjusted to a specified value.

2. The asphalt pavement paving construction hanging wire method according to claim 1, characterized in that: A thin screw bolt is arranged on one side of the front end of the wire hanger close to the arc-shaped notch, and the front end of the thin screw bolt is hinged to the arc-shaped wire buckle arranged in the arc-shaped notch; Wherein, after fine-tuning the fixing frame so that the elevation of the steel wire rope is accurately adjusted to a specified value, the method further comprises: Tighten a thin screw bolt arranged on one side of the front end of the wire hanger close to the arc-shaped notch to fasten the wire rope.

3. The asphalt pavement paving construction hanging wire method according to claim 2, characterized in that: The diameter of the arc-shaped notch is Φ3-4 mm.

4. The asphalt pavement paving construction hanging wire method as claimed in claim 3, characterized in that: The fixing frame is a cylindrical fixing frame; and, A vertical hole perpendicular to the direction of the transverse steel bar is provided in the middle of the frame of the fixing frame, and the vertical hole is used for the vertical steel bar to pass through and enable the transverse steel bar to move up and down along the vertical steel bar; The screw rod of the double-ear fastening bolt penetrates one side of the frame body of the fixing frame to the vertical hole.

5. The asphalt pavement paving construction hanging wire method according to claim 4, characterized in that: The fastening direction of the double-ear fastening bolt is in the same straight line as the center axis of the transverse steel bar.

6. The method for hanging wires in asphalt pavement paving construction as claimed in claim 2, characterized in that: The slot-type fixture is a channel steel; The vertical steel bars are vertically welded and fixed on the back plate of the channel steel.

7. The method for hanging wires in asphalt pavement paving construction as claimed in claim 6, characterized in that: A fastening bolt penetrating the side plate of the channel steel is arranged on one side of the channel steel and is used to fix the channel steel on the curbstone.

8. The method for hanging wires in asphalt pavement paving construction as claimed in claim 1, characterized in that: The vertical steel bars and the transverse steel bars are both plain round steel bars.

Images