JP3411265B2 - Laying and fixing of reinforcement sheet on asphalt paved road - Google Patents

Description

Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a method of laying and fixing a reinforcing sheet to be buried on an asphalt pavement road so as not to cause digging, cracks, potholes and the like. It is. [0002] In recent years, along with the development of the expressway network, road conditions have improved, and as a result, logistics transportation means have been mainly transported by large trucks. There are heavy trucks running all day long. As a result, a large wheel load is applied to the asphalt-paved road, and asphalt flows in a short period of time, causing wadachi digging, weakening of the roadbed, insufficient strength of the asphalt layer, cracks, etc. Breakage will occur. [0003] In addition, if a crack occurs due to embrittlement or expansion and contraction of asphalt in a cold season in winter or a high temperature in summer, the crack becomes large in a short period of time and proceeds to a pothole (dent). The asphalt pavement has been stripped, eventually causing damage, which is annoying road managers. [0004] When these breaks occur, they hinder the safe driving of the vehicle, which not only causes an accident but also generates noise, and causes a great deal of inconvenience to the local residents. And that repair costs enormous expense and time. [0005] Therefore, recently, in order to prevent such damage to the road, a synthetic resin yarn, a glass fiber yarn, and a knitted, woven or nonwoven fabric woven with relatively thick and less stretchable synthetic resin yarn have been added to a synthetic resin yarn. There is a method of embedding a reinforcing sheet coated with a bituminous material or a bitumen material in an asphalt layer to reinforce it. As a method of laying the reinforcing sheet,
There are a bonding method using an adhesive and a heat fusion bonding method. The former bonding method is a method in which an adhesive (glue) is applied to one surface of a reinforcing sheet, a release paper is attached to the coating film surface, and the release paper is peeled off and bonded. Also,
Other bonding methods include applying an adhesive such as asphalt emulsion to the laying surface and placing a reinforcing sheet on the surface, and then bonding, or laying the reinforcing sheet and rolling it with a heavy construction machine (rubber roller). There is. In the latter method, the reinforcing sheet is impregnated with a hot-melt adhesive and applied, and the reinforcing sheet is spread on the laying surface of a pavement road and heated by a burner or a dedicated heavy machine. It is to be melt-bonded. However, the former method of peeling off and releasing the release paper is an outdoor operation, and no matter how much the cleaning of the laying surface, there is still fine dust. The dust easily adhered to the surface, the adhesiveness was lowered and the surface was lifted, and a strong and stable fixing could not be performed. Similarly, when the laying surface was wet, the water also reduced the adhesiveness, and a strong and stable fixing could not be performed. Then, when it is pressed with heavy construction equipment, it will shift and roll up, which will not only result in poor workability, but also will not allow accurate and reliable laying in terms of smoothness, which will have a negative effect on quality. There was a point. Further, since the latter heat-melt bonding method is a direct method using a burner or the like, the reinforcing sheet is easily deteriorated by heating and the bonding strength is insufficient. In addition, using a special heavy machine takes a long construction time, requires specialized skills, increases the number of steps, increases the construction cost, and involves the danger of using fire, so work with great care Had to be done. The present invention has been developed with the object of solving the above problems, and can be laid accurately and reliably without any displacement or winding up, and can be extremely easily installed. It is an object of the present invention to provide a method for laying and fixing a reinforcing sheet on an asphalt-paved road, which can be shortened and has a low construction cost and is economical. [0011] As a means for solving the above-mentioned problems and achieving the object, the present invention is to prevent the occurrence of wadachi digging, cracks, potholes, etc. by being buried in an asphalt paved road. Laying and fixing a reinforcing sheet, wherein the reinforcing sheet is made of synthetic fiber yarn or glass fiber.
A knitted or woven fabric woven with a weft is covered with a coating layer.
A method for laying and fixing a reinforcing sheet on asphalt pavement has been developed and adopted, in which a tacking gun is used to insert a stud through a washer into an appropriate portion of the reinforcing sheet and fastened to the stud. [0012] The reinforcing sheet referred to here, glass textiles,
Synthetic fibers (e.g., polyester, polyamide, polyvinyl alcohol, acrylic, multi and spun yarns Go燃such aramid) knitted fabric is knitted woven (configuration) and the like, made of fabric, generally as "crack preventing agent" It is a sheet-like or lattice-like thing. As a coating layer, the reinforcing sheet is coated with asphalt such as bituminous material, thermosetting resin such as urea, epoxy, urethane and polyester, and vinyl resin such as acrylic. The rivet gun referred to here is a gun mainly used for construction, which can drive various types of equipment very quickly and firmly by driving rivets (nails) into concrete or steel. The rivet driving gun is a high-speed type (direct driving type) of a mechanism for propagating a rivet by directly applying gas pressure of an explosive to the rivet.
And a low-speed type (indirect driving type) having an intermediate mechanism such as a piston in the gun cavity, and either type may be used. The studs used in the stud gun must rush into a hard base such as concrete or steel at a high speed of 100 to 300 m / sec, and must be firmly fixed in the stud. It must be hard enough to withstand and strong enough not to break or break. For this purpose, special steel is used. After forming, a special heat treatment is applied to give the required hardness and toughness, and a material that is finished by plating for rust prevention is used. There are roughly two types of studs, one with a head and the other with a screw. Both types can be used, but considering the fastening with a washer, it is better to have a head. The diameter is 6-10mm, the diameter of the shaft is 2.5-6.0m
m, having a total length in the range of 15 to 120 mm. The washer has a function of strongly pressing the reinforcing sheet and a function of preventing the reinforcing sheet from being damaged.
Any type of flat washer, spring washer, toothed washer, etc. can be used, but the most common round flat washer is suitable and its size is
It is optimal to use a material having a thickness of 0.01 to 3 mm, a diameter of 10 to 50 mm, and an iron or galvanized material. Hereinafter, specific embodiments of the present invention will be described.
Six strands of glass fiber (S-twisted, 12T / 25mm, 810T) were stitched on each chain stitch of a ground knitting yarn of a base fabric raschel-knitted with 250d (28Tex) polyester filament yarn.
ex), and eight warp yarns 1a were knitted in a straight line and knitted with a swing width of one adjacent ground knitting yarn every 9 courses. A weft group 1b is obtained by inserting two continuous weft bundles of 6 glass fibers (S twist, 15T / 25mm, equivalent to 810Tex) into the warp group 1a every 9 courses.
Thus, a grid 2 having a mesh size of 25 mm × 25 mm was formed. This grid-like base cloth is immersed in an epoxy resin to be sufficiently impregnated, dried at a high temperature, and reinforced sheet 1 having 6.85 wt% of epoxy resin adhered to the base cloth.
Got. The obtained grid-like reinforcing sheet 1 weighs 590.9 g / m ² and has a warp direction of 142 KN / m (14.
5tf / m), elongation at break 3.3%, weft direction 136KN /
m (13.8 tf / m) and a tensile elongation at break of 2.9%. Next, a 5 cm deep and 100 m long excavation is excavated from the surface layer A of the asphalt paved road having a width of 6 m, and a reinforcing sheet 1 having a width of 1120 mm and a length of 50 m is overlapped with the excavated portion at a width of 120 mm to place three sheets. Was. (It was placed at a width of 3 m and a length of 50 m.) In the length direction of the reinforcing sheet 1, a thickness of 0 was set at 50 cm from the end, and at both ends and the center in the width direction. Place a round flat washer 3 with .4 mm, # 25 iron and zinc plating, and place the washer 3
Nail for construction from above (Japan Power Fastening)
Shaft diameter is 2.8mm, length 27
The reinforcing sheet 1 was fixed by driving in a stud 4 of mm. When the rivet 4 penetrates into the roadbed B, the concrete corresponding to the volume of the shaft portion is not discharged to the outside but is turned into fine powder and pushed to the outer periphery of the rivet 4 when the rivet 4 penetrates into the roadbed B. . For this reason, the concrete density at the periphery of the shaft becomes very high, and a large compressive force is generated there, and the tack is strongly tightened. Further, the tip of the stud 4 generates a large amount of frictional heat when entering the concrete at a very high speed,
In order to melt dust and the like in concrete into glass,
The concrete and the tips of the studs 4 are fused together to strengthen the integration. An asphalt mixture was covered on the reinforcing sheet 1. At the time of laying, there were several traffics of heavy construction equipment, but the reinforcing sheet 1 was laid down in a stable state without any displacement or winding up while being fixed. Although the embodiment of the main embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and can achieve the object of the invention and do not depart from the gist of the invention. It goes without saying that various design changes are possible within the range. [0029] As is evident from the foregoing description, according to the laying method of fixing the reinforcing sheet in asphalt pavement of the present invention, A
It is buried on a pavement-paved road and digging a wadachi,
Reinforcement seams to prevent
The reinforcing sheet is a synthetic fiber.
A knitted or woven fabric knitted or woven with weft or glass fiber yarn
At the appropriate places on the reinforcing sheet.
Driving a tack with a rivet gun through a washer to secure it
Reinforcement fabric on asphalt pavement
Since it is related to the method of laying and fixing the seat , the construction is easy and reliable, the speed is fast and the fastening strength is high, and the reinforcing sheet is laid in close contact with the roadbed without lifting etc.,
There is no displacement or winding of the reinforcing seam caused by running of heavy construction equipment. Further, since a tack gun is used, the construction period can be shortened and the construction cost can be reduced. Furthermore, since the rivet gun is small and lightweight, can be carried anywhere, and does not require any other power source, it can be used in any place and has the convenience of being constructed without being affected by the weather. Also, the handling operation is simple and no special technique is required. Furthermore, since the studs are driven in through the washers, the reinforcing sheet can be strongly pressed to prevent the reinforcing sheet from being lifted up and, at the same time, to prevent the reinforcing sheet from being damaged.

[Brief description of the drawings] FIG. 1 is a plan view showing an embodiment of the present invention. FIG. 2 is an enlarged sectional view of a main part. FIG. 3 is a partially cutaway plan view of a reinforcing sheet. [Explanation of symbols] 1 Reinforcement sheet 2 grid 3 Washer 4 studs

Claims (1)

(57) [Claim 1] A method of laying and fixing a reinforcing sheet buried in an asphalt pavement road to prevent the occurrence of wadachi digging, cracks, potholes, etc., Are knitted and woven with synthetic fiber yarns and glass fiber yarns.
Objects and fabrics are covered with a coating layer,
A method of laying and fixing a reinforcing sheet on an asphalt-paved road, wherein a stud is driven into a suitable portion of a road with a stud gun through a washer and fixed.