Preparation method of antiskid structure of highway bridge elastomer expansion device

Abstract

The invention relates to the technical field of bridge expansion and contraction devices, aims to solve the problems that an existing elastomer filling type expansion and contraction device is low in surface roughness and a vehicle is prone to slipping, and provides a preparation method of an anti-skid structure of a highway bridge elastomer expansion and contraction device. Anti-skid grains or granular bulges are formed on the surface of the elastic body to serve as an anti-skid structure of the elastic body expansion device; anti-skidding is carried out by forming the anti-skidding lines on the surface of the elastic body or by forming the dense granular protrusions on the surface of the elastic body, the friction coefficient of the surface of the elastic body is increased, a vehicle is prevented from skidding when passing through the expansion joint, and driving safety is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of bridge expansion devices, and in particular to a method for preparing an anti-skid structure of an elastic expansion device of a highway bridge. Background Art

[0002] In order to adapt to the temperature expansion and contraction deformation of the bridge beam, expansion joints need to be set at the beam ends. At the same time, in order to ensure the safety of vehicles passing through the expansion joints and prevent rainwater from the road from flowing into the beam ends from the expansion joints, expansion devices need to be set at the expansion joints to adapt to the expansion and contraction creep of the beam body and road drainage. At present, the main forms of expansion devices are comb plate type, modular type and seamless type.

[0003] The Chinese utility model patent with publication number CN217923053U provides an elastomeric prefabricated filling telescopic device that is easy to install and replace, and provides the structural composition, skeleton installation and construction method of the elastomeric filling telescopic device, which can achieve complete shielding of the expansion joint, has the characteristics of low driving noise and comfortable driving, and solves the problems of gaps on the surface of comb plate type and modular telescopic devices, and easy vehicle jumping. However, the elastic telescopic body of this filling telescopic device is currently made of polyurethane material after pouring and gradually solidified through polymerization reaction at room temperature. The material is in a viscous flow state before solidification, and will slowly self-level under the action of gravity to make its solidified surface smooth. The friction coefficient between the vehicle tire and the smooth elastomer surface is low, and there is a risk of wheel slippage when the vehicle passes through the expansion joint, which is particularly obvious in rainy and snowy weather, affecting driving safety. Summary of the invention

[0004] The present invention aims to provide a method for preparing an anti-skid structure of an elastomeric expansion device for a highway bridge, so as to solve the problem that the existing elastomeric filled expansion device has low surface roughness and vehicles are prone to slipping.

[0005] The present invention is achieved by adopting the following technical solutions:

[0006] The invention provides a method for preparing an anti-skid structure of an elastic expansion device of a highway bridge. The elastomer of the elastic expansion device is processed to form anti-skid patterns or granular protrusions on its surface as the anti-skid structure of the elastic expansion device.

[0007] As the preferred technical solution:

[0008] The following steps are involved:

[0009] S1: Install the base structure of the elastic expansion device, and then pour the elastic body to the designed height;

[0010] S2: After the elastomer is cured, a pattern is drawn on the surface of the elastomer according to the anti-slip pattern design style, and then a rubber carving machine is used to carve grooves on the surface of the elastomer along the drawn pattern to obtain an anti-slip structure of the elastomer telescopic device.

[0011] As the preferred technical solution:

[0012] The anti-slip pattern is a herringbone pattern, a cross pattern, a stripe pattern, a grid pattern, a zigzag pattern or a diamond pattern.

[0013] As the preferred technical solution:

[0014] The following steps are involved:

[0015] S1: preparing an embossing die, on which an anti-slip pattern is provided;

[0016] S2: Install the base structure of the elastic expansion device, and then pour the elastic body to the designed height;

[0017] S3: Apply release material on the surface of the embossing mold in step S1 that contacts the elastomer. When the elastomer reaches a surface-dry state, press the embossing mold evenly on the surface of the elastomer. After the elastomer is completely cured, remove the embossing mold to form a pattern on the surface of the elastomer that is consistent with the anti-slip pattern on the embossing mold, thereby obtaining an anti-slip structure for the elastomer telescopic device.

[0018] As the preferred technical solution:

[0019] The embossing die uses a template with anti-skid patterns on the surface or a mesh grille made in the pattern of anti-skid patterns.

[0020] As the preferred technical solution:

[0021] The following steps are involved:

[0022] S1: Install the base structure of the elastic expansion device, and then pour the elastic body to the designed height;

[0023] S2: After the elastomer is cured, brush or spray the adhesive on its surface. Before the adhesive reaches a surface-dry state, evenly spread anti-skid particles on the surface of the elastomer. The anti-skid particles are bonded to the surface of the elastomer by the adhesive. The anti-skid particles on the surface of the elastomer serve as an anti-skid structure for the elastic device of the elastomer.

[0024] As the preferred technical solution:

[0025] The anti-slip particles are rigid particles or elastic particles.

[0026] As the preferred technical solution:

[0027] The following steps are involved:

[0028] S1: Install the elastic expansion device foundation structure;

[0029] S2: Prepare an elastomer matrix, add flexible anti-skid particles to the elastomer matrix and stir evenly when mixing the materials before pouring the elastomer, and then pour the elastomer; after the elastomer is cured, the flexible anti-skid particles are evenly dispersed inside and on the surface of the elastomer, and the surface of the elastomer presents dense granular protrusions. The flexible anti-skid particles on the surface of the elastomer serve as an anti-skid structure for the elastomer telescopic device.

[0030] As the preferred technical solution:

[0031] The following steps are involved:

[0032] S1: Install the elastic expansion device foundation structure;

[0033] S2: preparing an elastomer matrix, adding flexible anti-skid particles to the elastomer matrix and stirring the mixture before casting the elastomer, and then casting the elastomer;

[0034] S3: Before the elastomer reaches a surface-dry state, anti-skid particles are spread on the surface of the elastomer; or, after the elastomer is cured, an adhesive is brushed or sprayed on the surface of the elastomer, and then anti-skid particles are evenly spread on the surface of the elastomer so that the anti-skid particles are bonded to the surface of the elastomer. The flexible anti-skid particles on the surface of the elastomer and the anti-skid particles together serve as an anti-skid structure of the elastomer telescopic device.

[0035] As the preferred technical solution:

[0036] Before the elastomer reaches a surface-dry state, rigid particles are spread on the surface of the elastomer.

[0037] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0038] 1. The present invention provides a method for preparing various anti-skid structures of elastomeric expansion devices for highway bridges. The main inventive concept is to increase the roughness of the surface of the elastomer, mainly by forming anti-skid patterns on the surface of the elastomer to prevent skidding, or by forming dense granular protrusions on the surface of the elastomer to prevent skidding, thereby increasing the friction coefficient of the surface of the elastomer, avoiding slipping of vehicles when passing through expansion joints, and ensuring driving safety.

[0039] 2. The present invention uses a rubber carving machine to carve patterns on the surface of the elastomer, which can effectively improve the surface roughness of the elastomer, the pattern style can be designed, and the processing is convenient and the effect is reliable. Since it is processed as an independent process after the elastomer is solidified, it does not interfere with the elastomer casting process, so it is applicable to new seam installation, old seam treatment, cast-in-place, prefabrication and other working conditions.

[0040] 2. The present invention improves the surface roughness of the expansion joint by pressing anti-skid patterns on the elastic body. The anti-skid patterns are various in form and beautiful in surface. The embossing mold can be customized with different materials and sizes according to needs, and can be reused, with low cost. The quality of this method is easy to control, the depth of the anti-skid patterns can be adjusted according to needs, the anti-skid effect is good, and the service life is long.

[0041] 3. The present invention improves the surface roughness by spreading anti-skid particles on the surface of the elastomer. The anti-skid particles are bonded to the surface of the elastomer by an adhesive, which does not cause defects to the elastomer matrix itself and can guarantee the quality of the matrix to the greatest extent. Moreover, through the bonding effect of the adhesive, the surface anti-skid particles are firmly bonded and are not easy to fall off during driving. The anti-skid effect is good and effective for a long time. In addition, the maintenance method is simple during the subsequent use process.

[0042] 4. The present invention adopts the method of adding flexible anti-skid particles into the elastomer matrix to improve the roughness of the matrix itself, and the construction method is simple. The selected flexible elastic particles have good compatibility with the matrix, can effectively improve the overall roughness of the elastomer, ensure the roughness of the lower matrix during the long-term use of the expansion joint, and can effectively avoid the maintenance of the surface anti-skid layer.

[0043] 5. The present invention not only adds flexible anti-skid particles into the elastomer matrix, but also spreads the anti-skid particles on the surface of the elastomer, thereby enhancing the anti-skid effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is the stripe pattern described in Example 1.

[0045] Figure 2 It is the diamond pattern described in Example 1.

[0046] Figure 3 It is the herringbone pattern described in Example 1.

[0047] Figure 4 It is the zigzag pattern described in Example 1.

[0048] Figure 5 This is a schematic diagram of bonding the anti-slip particles to the surface of the elastomer by an adhesive in Example 3.

[0049] Figure 6 This is a schematic diagram of adding flexible anti-skid particles into an elastomer matrix and spreading the anti-skid particles on the surface of the elastomer in Example 5.

[0050] Icon: 1- elastomer, 2- anti-slip particles, 3- adhesive, 4- flexible anti-slip particles. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] Example 1

[0053] This embodiment provides a method for preparing an anti-skid structure of an elastic expansion device for a highway bridge, comprising the following steps:

[0054] S1: Install the base structure of the elastic expansion device, and then pour the polyurethane elastomer 1 to the designed height;

[0055] S2: After the elastomer 1 is cured, a pattern is drawn on the surface of the elastomer 1 according to the anti-slip pattern design style, and then a rubber carving machine is used to carve grooves on the surface of the elastomer 1 along the drawn pattern. During the carving process, the rubber carving machine moves along the drawn pattern, and the rubber carving machine cuts off part of the elastomer 1 on the surface of the elastomer 1 on the moving route to form a series of grooves distributed according to the drawn pattern, thereby obtaining an anti-slip structure of the elastomer telescopic device.

[0056] Among them, the basic structure of the elastic expansion device includes a cross-seam plate component, an angle steel component and a stabilizing component.

[0057] The depth of a single groove is preferably 1-10 mm, and the width is preferably 3-15 mm. The anti-slip pattern design styles include but are not limited to herringbone pattern, cross pattern, stripe pattern, grid pattern, zigzag pattern, diamond pattern and other concave and convex patterns, such as Figure 1-Figure 4 shown.

[0058] This embodiment uses a rubber carving machine to carve patterns on the surface of the elastic body 1, which can effectively improve the surface roughness of the elastic body 1, the pattern style can be designed, and the processing is convenient and the effect is reliable. Since it is processed as an independent process after the elastic body 1 is cured, it does not interfere with the casting process of the elastic body 1, so it is applicable to new seam installation, old seam treatment, cast-in-place, prefabrication and other working conditions.

[0059] Example 2

[0060] This embodiment provides a method for preparing an anti-skid structure of an elastic expansion device for a highway bridge, comprising the following steps:

[0061] S1: preparing an embossing die, on which an anti-slip pattern is provided;

[0062] S2: Install the base structure of the elastic expansion device, and then pour the polyurethane elastomer 1 to the designed height;

[0063] S3: Apply a release agent or use an inert material such as polytetrafluoroethylene on the surface of the embossing mold in step S1 that contacts the elastomer 1. When the elastomer 1 reaches a surface dry state, press the embossing mold evenly on the surface of the elastomer 1. After the elastomer 1 is completely cured, remove the embossing mold to form a texture on the surface of the elastomer 1 that is consistent with the anti-slip texture on the embossing mold.

[0064] The embossing mold can be made of metal, wood, plastic, etc. The embossing mold can be a template with anti-skid patterns on the surface or a mesh grille made according to the anti-skid pattern.

[0065] The anti-skid pattern on the template is a concave-convex pattern, and the depth of the concave-convex pattern on the template is preferably 1-10 mm. Therefore, the height of the anti-skid pattern formed on the surface of the elastic body 1 is 1-10 mm. The design style of the anti-skid pattern can refer to Example 1. The pattern style of the anti-skid pattern on the mesh grille can also refer to Example 1.

[0066] A release agent is applied to the surface of the embossing die that contacts the elastomer 1 or an inert material such as polytetrafluoroethylene is used to facilitate demoulding of the elastomer 1 after curing.

[0067] The surface dry state refers to the state in which the viscosity of the elastomer 1 increases to a state where there is almost no flow.

[0068] This embodiment uses the method of pressing anti-skid patterns on the elastic body 1 to improve the surface roughness of the expansion joint. The anti-skid patterns are various in form and the surface is beautiful. The embossing mold can be customized with different materials and sizes as needed, and can be reused, with low cost. The quality of this method is easy to control, the depth of the anti-skid patterns can be adjusted as needed, the anti-skid effect is good, and the service life is long.

[0069] Example 3

[0070] like Figure 5 As shown, this embodiment provides a method for preparing an anti-skid structure of an elastic expansion device for a highway bridge, comprising the following steps:

[0071] S1: Install the base structure of the elastic expansion device, and then pour the polyurethane elastomer 1 to the designed height;

[0072] S2: After the elastomer 1 is cured, the adhesive 3 is brushed or sprayed on its surface. Before the adhesive 3 reaches a surface-dry state, the anti-slip particles 2 are evenly spread on the surface of the elastomer 1, and the anti-slip particles 2 are firmly bonded to the surface of the elastomer 1 through the adhesive 3.

[0073] The adhesive 3 may be a single-component adhesive 3 or a two-component adhesive 3 .

[0074] In order to increase the bonding strength between the anti-slip particles 2 and the surface of the elastomer 1, before spreading the anti-slip particles 2, the anti-slip particles 2 can be pretreated by covering the surface of the anti-slip particles 2 with a layer of adhesive by soaking, spraying, etc., and then the anti-slip particles 2 are evenly spread on the surface of the elastomer 1.

[0075] The pre-treated anti-skid particles 2 can be spread before or after the elastomer 1 is poured and reaches a surface-dry state.

[0076] The anti-skid particles 2 are rigid particles or elastic particles, and specifically can be ceramic particles, rubber particles, quartz sand, etc. The particle size of the anti-skid particles 2 is preferably 1 to 6 mm.

[0077] This embodiment adopts the method of spreading anti-skid particles 2 on the surface of the elastomer 1 to improve the surface roughness. The anti-skid particles 2 are bonded to the surface of the elastomer 1 through the adhesive 3, which does not cause defects to the elastomer 1 matrix itself, and can guarantee the quality of the matrix to the greatest extent. In addition, through the bonding effect of the adhesive 3, the surface anti-skid particles 2 are firmly bonded and are not easy to fall off during driving. The anti-skid effect is good and the effective time is long. In addition, the maintenance and repair method is simple during the subsequent use process.

[0078] Example 4

[0079] This embodiment provides a method for preparing an anti-skid structure of an elastic expansion device for a highway bridge, comprising the following steps:

[0080] S1: Install the elastic expansion device foundation structure;

[0081] S2: preparing an elastomer 1 matrix, adding flexible anti-skid particles 4 to the elastomer 1 matrix and stirring the mixture before pouring the elastomer 1, and then pouring the elastomer 1.

[0082] After the elastomer 1 is cured, the flexible anti-skid particles 4 are evenly dispersed inside and on the surface of the elastomer 1, so that its surface presents dense granular protrusions. The flexible anti-skid particles 4 on the surface of the elastomer 1 serve as the anti-skid structure of the elastic device.

[0083] The addition ratio of the flexible anti-skid particles 4 is preferably 5-40%.

[0084] The flexible anti-skid particles 4 are elastic particles, such as rubber particles, polyurethane particles, etc. The particle size of the flexible anti-skid particles 4 is preferably 1 to 6 mm.

[0085] This embodiment adopts the method of adding flexible anti-skid particles 4 to the elastomer 1 matrix to improve the roughness of the matrix itself, and the construction method is simple. The selected flexible elastic particles have good compatibility with the matrix, can effectively improve the overall roughness of the elastomer 1, ensure the roughness of the lower matrix during the long-term use of the expansion joint, and effectively avoid the maintenance of the surface anti-skid layer.

[0086] Example 5

[0087] like Figure 6 As shown, this embodiment provides a method for preparing an anti-skid structure of an elastic expansion device for a highway bridge, comprising the following steps:

[0088] S1: Install the elastic expansion device foundation structure;

[0089] S2: preparing an elastomer 1 matrix, adding flexible anti-skid particles 4 to the elastomer 1 matrix and stirring the mixture before pouring the elastomer 1, and then pouring the elastomer 1;

[0090] S3: Before the elastomer 1 reaches a surface-dry state, anti-skid particles 2 are spread on the surface of the elastomer 1; or, after the elastomer 1 is cured, an adhesive 3 is brushed or sprayed on the surface of the elastomer 1, and then the anti-skid particles 2 are evenly spread on the surface of the elastomer 1, so that the anti-skid particles 2 are bonded to the surface of the elastomer 1.

[0091] Before the elastomer 1 reaches the surface dry state, the anti-skid particles 2 are spread on the surface of the elastomer 1. Under the combined effect of the weight of the anti-skid particles 2 and the surface tension of the elastomer 1, the lower part of the anti-skid particles 2 is immersed in the elastomer 1, forming a firm connection with the cured elastomer 1, and the upper part of the anti-skid particles 2 is exposed on the surface of the elastomer 1, further enhancing the surface roughness and improving driving safety. At this time, the anti-skid particles 2 are preferably rigid particles, with a Mohs hardness of 6-9.5, an apparent density of 2.5-3.5g / cm3, and a particle size of 1-6mm. The rigid particles can be quartz sand, corundum, ceramic sand, basalt sand, etc.

[0092] The method of bonding the anti-skid particles 2 with the adhesive 3 can refer to Example 3, and the anti-skid particles 2 can be either rigid particles or elastic particles.

[0093] In this embodiment, not only the flexible anti-skid particles 4 are added to the elastomer 1 matrix, but also the anti-skid particles 2 are spread on the surface of the elastomer 1, thereby enhancing the anti-skid effect.

[0094] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for preparing an anti-skid structure of an elastic expansion device for a highway bridge, characterized in that: The elastomer of the elastic expansion device is treated so that anti-skid patterns or granular protrusions are formed on its surface as the anti-skid structure of the elastic expansion device.

2. The method for preparing the anti-skid structure of the elastic expansion device of a highway bridge according to claim 1, characterized in that: The following steps are involved: S1: Install the base structure of the elastic expansion device, and then pour the elastic body to the designed height; S2: After the elastomer is cured, a pattern is drawn on the surface of the elastomer according to the anti-slip pattern design style, and then a rubber carving machine is used to carve grooves on the surface of the elastomer along the drawn pattern to obtain an anti-slip structure of the elastomer telescopic device.

3. The method for preparing the anti-skid structure of the elastic expansion device of a highway bridge according to claim 2, characterized in that: The anti-slip pattern is a herringbone pattern, a cross pattern, a stripe pattern, a grid pattern, a zigzag pattern or a diamond pattern.

4. The method for preparing the anti-skid structure of the elastic expansion device of a highway bridge according to claim 1, characterized in that: The following steps are involved: S1: preparing an embossing die, on which an anti-slip pattern is provided; S2: Install the base structure of the elastic expansion device, and then pour the elastic body to the designed height; S3: Apply release material on the surface of the embossing mold in step S1 that contacts the elastomer. When the elastomer reaches a surface-dry state, press the embossing mold evenly on the surface of the elastomer. After the elastomer is completely cured, remove the embossing mold to form a pattern on the surface of the elastomer that is consistent with the anti-slip pattern on the embossing mold, thereby obtaining an anti-slip structure for the elastomer telescopic device.

5. The method for preparing the anti-skid structure of the elastic expansion device of a highway bridge according to claim 4, characterized in that: The embossing die uses a template with anti-skid patterns on the surface or a mesh grille made in the pattern of anti-skid patterns.

6. The method for preparing the anti-skid structure of the elastic expansion device of a highway bridge according to claim 1, characterized in that: The following steps are involved: S1: Install the base structure of the elastic expansion device, and then pour the elastic body to the designed height; S2: After the elastomer is cured, brush or spray the adhesive on its surface. Before the adhesive reaches a surface-dry state, evenly spread anti-skid particles on the surface of the elastomer. The anti-skid particles are bonded to the surface of the elastomer by the adhesive. The anti-skid particles on the surface of the elastomer serve as an anti-skid structure for the elastic device of the elastomer.

7. The method for preparing the anti-skid structure of the elastic expansion device of a highway bridge according to claim 6, characterized in that: The anti-slip particles are rigid particles or elastic particles.

8. The method for preparing the anti-skid structure of the elastic expansion device of a highway bridge according to claim 1, characterized in that: The following steps are involved: S1: Install the elastic expansion device foundation structure; S2: Prepare an elastomer matrix, add flexible anti-skid particles to the elastomer matrix and stir evenly when mixing the materials before pouring the elastomer, and then pour the elastomer; after the elastomer is cured, the flexible anti-skid particles are evenly dispersed inside and on the surface of the elastomer, and the surface of the elastomer presents dense granular protrusions. The flexible anti-skid particles on the surface of the elastomer serve as an anti-skid structure for the elastomer telescopic device.

9. The method for preparing the anti-skid structure of the elastic expansion device of a highway bridge according to claim 1, characterized in that: The following steps are involved: S1: Install the elastic expansion device foundation structure; S2: preparing an elastomer matrix, adding flexible anti-skid particles to the elastomer matrix and stirring the mixture before casting the elastomer, and then casting the elastomer; S3: Before the elastomer reaches a surface-dry state, anti-skid particles are spread on the surface of the elastomer; or, after the elastomer is cured, an adhesive is brushed or sprayed on the surface of the elastomer, and then anti-skid particles are evenly spread on the surface of the elastomer so that the anti-skid particles are bonded to the surface of the elastomer. The flexible anti-skid particles on the surface of the elastomer and the anti-skid particles together serve as an anti-skid structure of the elastomer telescopic device.

10. The method for preparing the anti-skid structure of the elastic expansion device of a highway bridge according to claim 9, characterized in that: Before the elastomer reaches a surface-dry state, rigid particles are spread on the surface of the elastomer.

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