Long-life repairing method for factory road well lid

Abstract

The invention discloses a long-life repairing method for a factory road well lid. The long-life repairing method comprises the following steps that the well lid and a road surface within a certain range on the periphery of the well lid are thoroughly cleaned; broken concrete on the periphery of the well lid is crushed and cleaned until a solid base layer is exposed; a layer of reinforcing glue is evenly smeared on the cleaned base layer, then a reinforcing mesh is laid, finally, a layer of reinforcing glue is smeared, and it is ensured that the reinforcing mesh and the base layer are firmly combined; a spacer lifting well is arranged between the well lid and the base layer, and a spacer is connected with surrounding road drainage ditches through steel pipes; a new well lid is replaced, and sealant is smeared to prevent water seepage; concrete with the strength of C35 and above is adopted for pouring the periphery of the well lid, and the pouring height is slightly higher than the road surface; after the concrete is initially set, a blackening special material is smeared on the surface layer, and then a troweling machine is used for troweling the concrete surface on the periphery of the well lid so that the concrete surface can be flush with the road surface; covering a plastic film for curing, wherein the curing period is not less than 7 days; the durability and stability of the well lid are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of road manhole cover repair, and specifically provides a long-life repair method for manhole covers on factory roads. Background Art

[0002] In the factory environment of steel enterprises, road manhole covers are constantly affected by frequent rolling and vibration of large trucks and heavy vehicles, as well as natural factors such as rain erosion and temperature changes. Damage is relatively common. In actual situations, problems such as the loosening of the concrete around the manhole covers on the main roads of the factory area and the cracking of the manhole cover body occur frequently. Traditional simple filling and repair methods are difficult to withstand long-term loads and will be damaged again in a short time; while replacing the entire manhole cover not only has a high procurement cost, but also is time-consuming and laborious during the construction process. Moreover, traditional methods fail to effectively handle the connection between the manhole cover and the surrounding road surface, resulting in poor integrity and stability between the manhole cover and the road surface, and unable to meet the durability requirements of factory roads for manhole covers. Summary of the Invention

[0003] The purpose of the present invention is to solve the technical problems existing in the above-mentioned prior art, and provide a long-life repair method for manhole covers on factory roads.

[0004] The present invention provides the following technical solution: A long-life repair method for manhole covers on factory roads, comprising the following steps: S1. Thoroughly clean the manhole cover and the road surface within a certain range around it. S2. Crush and clean the damaged concrete around the manhole cover until a solid base layer is exposed. S3. Evenly apply a layer of reinforcement glue on the cleaned base layer, then lay a steel mesh, and finally apply another layer of reinforcement glue to ensure that the steel mesh is firmly bonded to the base layer. S4. Set up a spacer to lift the manhole cover between the manhole cover and the base layer, and connect the spacer to the surrounding road drainage ditch through a steel pipe. S5. Replace the new manhole cover and apply sealant to prevent water seepage. S6. Pour concrete with a strength of C35 or higher around the manhole cover, and the pouring height is slightly higher than the road surface. S7. After the concrete begins to set, apply a special blackening material on the surface layer, and then use a troweling machine to smooth the surface of the concrete around the manhole cover to make it flush with the road surface. S8. Cover with a plastic film for curing, and the curing period is not less than 7 days.

[0005] Further, in step S1, a high-pressure water gun is used to clean the manhole cover and the road surface within a radius of 0.5 meters around it to remove dust, debris and oil stains.

[0006] Further, the thickness of the special reinforcing glue applied twice in step S3 is 4 - 6 mm, the grid size of the steel mesh is 10 cm × 10 cm, and the diameter of the steel bars is 6 - 10 mm.

[0007] Further, in step S4, the lifting height of the spacer shaft is 0.3 - 0.5 m, and the spacer is made of welded iron sheets.

[0008] Further, in step S8, obvious warning signs are set during the curing period, and vehicle passage is prohibited.

[0009] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By combining special reinforcing glue and steel mesh, the strength and stability of the base layer are significantly improved; 2. Using welded iron sheet spacer shafts and connecting them to the drainage ditch to ensure a tighter connection between the manhole cover and the surrounding road surface; 3. Using rapid hardening concrete and efficient construction equipment to shorten the construction period and reduce the impact on traffic; 4. Using sealant and blackening materials to improve the waterproof performance and surface wear resistance of the manhole cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a schematic diagram of replacing a new manhole cover of the present invention; Figure 2 is a schematic diagram of setting warning signs after pouring concrete in the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0011] Please refer to Figure 1-2 , this embodiment is a long - life repair method for manhole covers on factory roads, including the following steps: Cleaning and preparation: First, use a high - pressure water gun to thoroughly wash the manhole cover and the road surface within a radius of about 50 cm around it to remove dust, debris, and oil stains. For the damaged concrete around the manhole cover, use small - scale crushing equipment to crush and clean it until the solid base layer is exposed, with a depth of about 5 - 10 cm. As can be seen in the figure, the state of the base layer after cleaning is shown.

[0012] Base layer reinforcement: Uniformly apply a layer of special reinforcing glue about 5 mm thick on the cleaned base layer, and then lay a steel mesh with a grid size of 10 cm × 10 cm and a steel bar diameter of about 8 mm. After laying, apply another layer of reinforcing glue with the same thickness to ensure the firm combination of the steel mesh and the base layer. A spacer shaft (height 400 mm) is used between the manhole cover and the base layer, and the spacer is made of welded iron sheets. The spacer is directly connected to the surrounding road drainage ditch with a 300 - diameter steel pipe.

[0013] Manhole cover repair: If the manhole cover is slightly cracked, it can be repaired by welding with a suitable type of electric welding machine; if it is severely cracked, replace it with a heavy - duty ductile iron manhole cover (with a pressure resistance of 150 tons), and apply sealant to prevent water seepage.

[0014] Concrete pouring: Pour the surrounding area of the manhole cover with high-early-strength concrete with a strength of C35 or above. The pouring height is slightly higher than the road surface by 3 - 5 mm. After pouring, vibrate it thoroughly with a plate vibrator to ensure uniform filling of the concrete.

[0015] Subsequent treatment: After the concrete begins to set, apply a special blackening material to the surface layer, and then use a troweling machine to smooth the surface of the concrete around the manhole cover to make it flush with the road surface. Then cover it with a plastic film for curing, and the curing period shall not be less than 7 days. During the curing period, set obvious warning signs, such as the yellow anti-collision barrels in the picture, and prohibit vehicle passage.

[0016] Repairing with the present invention has the following advantages: Improved durability: Through the reinforcement of the base layer and the targeted repair of the manhole cover, the integrity and stability of the manhole cover and the road surface are significantly enhanced, the compressive and vibration resistance of the manhole cover are greatly improved, and the service life is extended. Practical tests show that the service life of the manhole cover repaired by this method is extended from the original 3 months to more than 5 years compared with the traditional method.

[0017] Cost reduction: Due to the extended service life, the labor and material costs for frequent repairs are reduced. It is estimated that the single repair cost is reduced by about 40% compared with the traditional replacement method.

[0018] Construction advantages: The repair operation is simple, the required equipment and materials are common and easy to obtain, and the construction period is short. Usually, the repair of a single manhole cover can be completed within 6 - 8 hours, with little impact on the normal traffic of the factory road.

Claims

1. A long-life repair method for manhole covers on factory area roads, characterized in that: It includes the following steps: S1. Thoroughly clean the road surface within a certain range around the manhole cover and its periphery; S2. Break and clean the damaged concrete around the manhole cover until the solid base layer is exposed; S3. Uniformly apply a layer of reinforcement glue on the cleaned base layer, then lay a steel mesh, and finally apply another layer of reinforcement glue to ensure the firm bonding of the steel mesh and the base layer; S4. Set up a spacer to lift the manhole cover between the manhole cover and the base layer, and connect the spacer and the surrounding road drainage ditch through a steel pipe; S5. Replace the new manhole cover and apply sealant to prevent water seepage; S6. Pour the concrete with a strength of C35 or above around the manhole cover, and the pouring height is slightly higher than the road surface; S7. After the concrete begins to set, apply a special blackening material on the surface layer, and then use a troweling machine to smooth the surface of the concrete around the manhole cover to make it flush with the road surface; S8. Cover with a plastic film for curing, and the curing period is not less than 7 days.

2. The long - life repair method for manhole covers on factory roads according to claim 1 is characterized in that: In step S1, use a high-pressure water gun to clean the road surface within a radius of 0.5 meters around the manhole cover and its periphery to remove dust, debris and oil stains.

3. A long-life repair method for manhole covers on factory roads according to claim 1, characterized in that: In step S3, the thickness of the two applications of the reinforcement glue is 4 - 6 mm, the mesh size of the steel mesh is 10 cm × 10 cm, and the steel bar diameter is 6 - 10 mm.

4. A long-life repair method for manhole covers on factory roads according to claim 1, characterized in that: In step S4, the height of the spacer for lifting the manhole cover is 0.3 - 0.5 meters, and the spacer is made of welded iron sheet.

5. A long - life repair method for manhole covers on factory roads according to claim 1, characterized in that: In step S8, set up obvious warning signs during the curing period to prohibit vehicle passage.

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