Double-T thin plate type GFRP rib concrete combined well lid with detachable panel

Abstract

The utility model discloses a panel detachable double-T thin plate type GFRP (Glass Fiber Reinforced Plastic) bar concrete combined well lid, which comprises a rectangular lid body, the structural type of the lid body is a double-T thin plate type, the lid body comprises a panel and a bearing beam, the panel is a rectangular thin plate, the bearing beam is a 2-shaped beam, the panel is arranged at the upper part of the bearing beam, and the bearing beam extends to the transverse edge of the bottom of the lid body; the bearing beams comprise longitudinal beams and transverse beams, the outer edges of the transverse beams are flush with the transverse outer edges of the panels, the longitudinal beams are symmetrically arranged at the midspan bottom along the longitudinal symmetry axis of the cover body, and the longitudinal beams and the transverse beams are consistent in beam height; connecting clamping blocks are arranged at the bottoms of the panels, and steel hoops are arranged on the edges of the combination faces of the panels and the bearing beams. And reinforcing bars in the bearing beam adopt GFRP (Glass Fiber Reinforced Plastic) bar cages. The self-weight of the concrete well lid is reduced, the cost of the concrete well lid is reduced, the bearing performance of the concrete well lid is enhanced, the service life of the concrete well lid is prolonged, and the advantages of the concrete well lid are brought into play.

Description

Technical Field

[0001] The utility model relates to the technical field of traffic facilities, in particular to a double-T thin plate type GFRP reinforced concrete combined manhole cover with a detachable panel. Background Art

[0002] With the rapid development of my country's economy, the construction and improvement of municipal infrastructure have achieved remarkable results. In order to ensure the effective management and maintenance of underground pipeline facilities, wells are set up at certain intervals on the road surface, which has led to a continuous increase in the demand for manhole covers as supporting facilities, and the requirements for their engineering safety performance are also increasing. As an indispensable part of municipal engineering, manhole covers play a vital role in protecting underground pipeline facilities, ensuring traffic safety, and improving the city's image.

[0003] At present, the manhole covers widely used in my country are mainly divided into two categories: cast iron manhole covers and concrete manhole covers. Compared with cast iron manhole covers, concrete manhole covers are gradually occupying a place in municipal engineering due to their excellent anti-theft performance, low pollution and low cost. However, due to the material properties of concrete, this kind of manhole cover also has the problem of heavy weight and insufficient bearing capacity of the manhole cover due to the corrosion of steel bars due to cracking of concrete. In order to be used with the existing manhole ring, the current concrete manhole cover generally adopts a fish belly structure, and the manhole cover overlaps the manhole ring with an obvious variable cross-section part. This causes the stress concentration effect of the variable cross-section part during the stress process of the manhole cover, resulting in oblique cracks on the edge of the cover body, thereby shortening the service life of the concrete manhole cover. In addition, after the surface layer of the ordinary concrete manhole cover cracks, wear and tear, etc., the entire manhole cover needs to be replaced, which is too costly in terms of economic cost. In order to give full play to the advantages of concrete manhole covers, these four problems need to be solved. Summary of the invention

[0004] The main purpose of the utility model is to overcome the deficiencies of the prior art and provide a double-T thin plate type GFRP reinforced concrete composite manhole cover with a detachable panel.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a double-T thin plate type GFRP reinforced concrete composite manhole cover with a detachable panel, comprising a cover body, a panel, a load-bearing beam, a longitudinal beam and a cross beam;

[0006] The cover body is rectangular, and the structure of the cover body is a double T thin plate type. The cover body includes a panel and a load-bearing beam. The panel is a rectangular thin plate, and the load-bearing beam is a "2"-shaped beam. The panel is arranged on the upper part of the load-bearing beam, and the load-bearing beam extends to the horizontal edge of the bottom of the cover body;

[0007] The load-bearing beams include longitudinal beams and transverse beams. The transverse beams are arranged at the transverse edges of the cover body. The edges of the transverse beams are flush with the transverse outer edges of the cover body. The longitudinal beams extend all the way to the transverse edges of the cover body. The longitudinal beams are symmetrically arranged at the bottom of the mid-span along the longitudinal symmetry axis of the cover body. The beam heights of the longitudinal beams and the transverse beams are consistent.

[0008] Preferably, the panel is detachable, and the panel and the load-bearing beam are used in combination.

[0009] Preferably, a connecting block is provided at the bottom of the panel, and a restraining steel hoop is provided at the edge of the joint surface between the panel and the load-bearing beam.

[0010] Preferably, the material of the panel and the connecting block is reactive powder concrete (RPC), and the material of the load-bearing beam is ordinary concrete.

[0011] Preferably, the internal reinforcement of the load-bearing beam adopts a GFRP cage, which is formed by GFRP longitudinal bars and GFRP stirrups tied with thin iron wires, and both the GFRP longitudinal bars and GFRP stirrups are GFRP bars with spiral indentations on the surface.

[0012] Preferably, the distance between the longitudinal beam edges is smaller than the corresponding vehicle tire width under standard axle load.

[0013] Preferably, the distance from the edge of the longitudinal beam to the longitudinal edge of the cover body is half of the distance between the edges of the longitudinal beams.

[0014] Beneficial effects:

[0015] 1. In the utility model, the structure of the cover body is a double T thin plate type. The panel is a component that supports and protects pedestrians and vehicles and ensures the flatness of the road surface. The load-bearing beam is the load-bearing component of the cover body. When the cover body is subjected to force, the force on the road surface is transmitted to the load-bearing beam through the panel. The force system is more reasonable, and because the panel adopts a thin plate type, the amount of concrete used is reduced, which can achieve the purpose of reducing the dead weight.

[0016] 2. In the utility model, the panel and the load-bearing beam are used in combination. When the panel of the manhole cover has problems such as cracking or wear, the panel can be replaced separately or the manhole cover can be replaced as a whole according to the use of the load-bearing beam. This can greatly save the cost caused by replacing the entire manhole cover due to cracking or wear of the panel.

[0017] 3. In the utility model, a connecting block is provided at the bottom of the panel corresponding to the load-bearing longitudinal beam, and a restraining steel hoop is provided at the edge of the joint surface between the panel and the load-bearing beam, which can better enhance the integrity of the manhole cover, avoid the dislocation and loosening of the panel and the load-bearing beam during the force-bearing process, increase the safety of the manhole cover, and facilitate the disassembly and installation of the manhole cover panel.

[0018] 4. In the utility model, the GFRP longitudinal bars and GFRP stirrups included in the GFRP cage have the advantages of good tensile strength, light weight and low cost compared with ordinary steel bars, and the GFRP bars have excellent corrosion resistance. They not only greatly improve the bearing capacity of the manhole cover, but also avoid the problem of reduced bearing capacity of the cover body due to steel bar corrosion, thereby extending the service life of the cover body while reducing its own weight and reducing its cost.

[0019] 5. In the utility model, the load-bearing component of the cover body is a load-bearing beam, rather than a load-bearing plate commonly used in existing concrete manhole covers, which optimizes the force system and reduces the amount of concrete, which is beneficial to reducing the deadweight of the cover body.

[0020] 6. In the present utility model, the material of the panel is RPC concrete. Compared with ordinary concrete, RPC concrete has a finer and smoother surface, is more wear-resistant, and has better tensile and crack resistance, which is beneficial to extending the service life of the cover and making its appearance more beautiful.

[0021] 7. In the utility model, the load-bearing longitudinal beam extends all the way to the lateral edge of the cover body, thereby avoiding the stress concentration phenomenon caused by the variable cross section, and the force system is more reasonable.

[0022] 8. In the present invention, the cross beam is flush with the lateral edge of the cover body, so as to increase the overall rigidity of the cover body and facilitate use with the existing well ring.

[0023] 9. In the utility model, the distance between the edges of the longitudinal beams is smaller than the corresponding tire width under the standard axle load. This measure can ensure that when the vehicle load acts, the longitudinal beams of the cover body will share the load, avoiding the phenomenon of local compression damage of the cover body.

[0024] 10. In the utility model, the distance from the edge of the longitudinal beam to the longitudinal edge of the cover body is half of the distance between the edges of the longitudinal beams. This measure can ensure that when two manhole covers jointly bear the load of the vehicle, there will still be multiple longitudinal beams to share the load, which is beneficial to extend the service life of the cover body. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A top view of a manhole cover provided by an embodiment of the utility model;

[0026] Figure 2 A lateral side view of a manhole cover provided by an embodiment of the utility model;

[0027] Figure 3 A longitudinal side view of a manhole cover provided by an embodiment of the utility model;

[0028] Figure 4 A schematic diagram of the structure of a cover body provided in an embodiment of the utility model;

[0029] Figure 5A schematic diagram of the structure of the panel and the load-bearing beam provided in the embodiment of the utility model;

[0030] Figure 6 A schematic diagram of the structure of the longitudinal beam and the cross beam provided in the embodiment of the utility model;

[0031] Figure 7 A schematic diagram of a panel provided with a connection card block according to an embodiment of the utility model;

[0032] Figure 8 A schematic diagram of a GFRP cage provided in an embodiment of the utility model.

[0033] Reference numerals:

[0034] 1. Cover; 2. Panel; 3. Load-bearing beam; 4. Longitudinal beam; 5. Cross beam; 6. Connecting block; 7. GFRP reinforcement cage; 8. GFRP longitudinal reinforcement; 9. GFRP stirrups; 10. Restraining steel hoops. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0036] like Figure 1-8 As shown, a double-T thin plate type GFRP reinforced concrete composite manhole cover with a detachable panel includes a cover body 1, a panel 2, a load-bearing beam 3, a longitudinal beam 4, a cross beam 5, a connecting block 6, a GFRP reinforcement cage 7, a GFRP longitudinal reinforcement 8, a GFRP stirrup 9 and a restraining steel hoop 10;

[0037] The cover body 1 is rectangular, and the structure of the cover body 1 is a double T thin plate type. The cover body 1 includes a panel 2 and a load-bearing beam 3. The panel 2 is a rectangular thin plate, and the load-bearing beam 3 is a "2"-shaped beam. The panel 2 is arranged on the upper part of the load-bearing beam 3, and the load-bearing beam 3 extends to the horizontal edge of the bottom of the cover body 1; the panel 2 is a component that supports and protects pedestrians and vehicles and ensures the flatness of the road surface, and the load-bearing beam 3 is a load-bearing component; when the cover body 1 is subjected to force, the force on the road surface is transmitted to the load-bearing beam 3 through the panel 2, and the force system is more reasonable. In addition, since the panel 2 adopts a thin plate type, the amount of concrete is reduced, which can achieve the purpose of reducing the dead weight.

[0038] The material of the panel 2 mentioned in the utility model is reactive powder concrete (RPC), and the material of the load-bearing beam 3 is ordinary concrete. Compared with ordinary concrete, RPC concrete has a smoother and more wear-resistant surface, better tensile and crack resistance, which is conducive to extending the service life of the cover and making its appearance more beautiful.

[0039] The load-bearing beam 3 includes a longitudinal beam 4 and a transverse beam 5. The transverse beam 5 is arranged at the transverse edge of the cover body 1. The edges of the transverse beam 5 are flush with the transverse outer edges of the cover body 1, which increases the overall rigidity of the cover body 1 and is conducive to use with the existing well ring. The longitudinal beam 4 extends all the way to the transverse edge of the cover body 1 to avoid stress concentration caused by variable cross-sections, and the force system is more reasonable; the longitudinal beam 4 is symmetrically arranged at the bottom of the mid-span along the longitudinal symmetry axis of the cover body 1, and the beam heights of the longitudinal beam 4 and the transverse beam 5 are consistent.

[0040] The panel 2 and the load-bearing beam 3 mentioned in the present invention are used in combination. A connecting block 6 is arranged at the bottom of the panel 1 corresponding to the longitudinal beam 4. The connecting block 6 is cast together with the panel 2 with RPC concrete. A restraining steel hoop 10 is arranged at the edge of the joint surface of the panel 2 and the load-bearing beam 3. These two measures can effectively enhance the integrity of the panel 2 and the load-bearing beam 3.

[0041] The distance between the edges of the longitudinal beam 4 mentioned in the present invention is smaller than the corresponding tire width under the standard axle load. This measure can ensure that when the vehicle load is applied, the longitudinal beam 4 of the cover body 1 will share the load, thereby avoiding the phenomenon of local compression damage of the cover body 1; the distance from the edge of the longitudinal beam 4 to the longitudinal edge of the cover body 1 is half of the distance between the edges of the longitudinal beam 4. This measure can ensure that when the two manhole covers jointly bear the vehicle load, the longitudinal beam 4 will still share the load, which is beneficial to extending the service life of the cover body 1.

[0042] The internal reinforcement of the load-bearing beam 3 adopts a GFRP cage 7, which is formed by GFRP longitudinal bars 8 and GFRP stirrups 9 tied with thin iron wires. Both the GFRP longitudinal bars 8 and the GFRP stirrups 9 are GFRP bars with spiral indentations on the surface.

[0043] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A double-T thin plate type GFRP reinforced concrete composite manhole cover with a detachable panel, characterized in that: It includes cover, panels, load-bearing beams, longitudinal beams and transverse beams; The cover body is rectangular, and the structure of the cover body is a double T thin plate type. The cover body includes a panel and a load-bearing beam. The panel is a rectangular thin plate, and the load-bearing beam is a "2"-shaped beam. The panel is arranged on the upper part of the load-bearing beam, and the load-bearing beam extends to the horizontal edge of the bottom of the cover body; The load-bearing beams include longitudinal beams and transverse beams. The transverse beams are arranged at the transverse edges of the cover body. The edges of the transverse beams are flush with the transverse outer edges of the cover body. The longitudinal beams extend all the way to the transverse edges of the cover body. The longitudinal beams are symmetrically arranged at the bottom of the mid-span along the longitudinal symmetry axis of the cover body. The beam heights of the longitudinal beams and the transverse beams are consistent.

2. The double-T thin plate type GFRP reinforced concrete composite manhole cover with a detachable panel according to claim 1, characterized in that: The panel is a detachable panel.

3. The double-T thin plate type GFRP reinforced concrete composite manhole cover with a detachable panel according to claim 2, characterized in that: A connecting block is arranged at the bottom of the panel, and a restraining steel hoop is arranged at the edge of the joint surface between the panel and the load-bearing beam.

4. The double-T thin plate type GFRP reinforced concrete composite manhole cover with a detachable panel according to claim 3, characterized in that: The material of the panel and the connecting block is active powder concrete, and the material of the load-bearing beam is ordinary concrete.

5. The double-T thin plate type GFRP reinforced concrete composite manhole cover with a detachable panel according to claim 4, characterized in that: The internal reinforcement of the load-bearing beam adopts GFRP reinforcement cage, which is formed by GFRP longitudinal reinforcement and GFRP stirrups tied with thin iron wires. Both the GFRP longitudinal reinforcement and the GFRP stirrups are GFRP reinforcement materials with spiral indentations on the surface.

6. The double-T thin plate type GFRP reinforced concrete composite manhole cover with a detachable panel according to claim 5, characterized in that: The distance between the longitudinal beam edges is smaller than the corresponding vehicle tire width under standard axle load.

7. The double-T thin plate type GFRP reinforced concrete composite manhole cover with a detachable panel according to claim 6, characterized in that: The distance from the edge of the longitudinal beam to the longitudinal edge of the cover body is half of the distance between the edges of the longitudinal beams.

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