LU501207B1 - Structure and method for reinforcing manhole cover anchored with existing road surface foundation by means of dowel bars - Google Patents
Structure and method for reinforcing manhole cover anchored with existing road surface foundation by means of dowel bars Download PDFInfo
- Publication number
- LU501207B1 LU501207B1 LU501207A LU501207A LU501207B1 LU 501207 B1 LU501207 B1 LU 501207B1 LU 501207 A LU501207 A LU 501207A LU 501207 A LU501207 A LU 501207A LU 501207 B1 LU501207 B1 LU 501207B1
- Authority
- LU
- Luxembourg
- Prior art keywords
- manhole cover
- bar
- existing pavement
- bearing
- cover bearing
- Prior art date
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
- E02D29/14—Covers for manholes or the like; Frames for covers
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
- E03F5/06—Gully gratings
Abstract
The present invention provides road foundation engineering construction technology, and particularly relates to a structure and method for reinforcing a manhole cover anchored with an existing road surface foundation by means of dowel bars. The structure is arranged at a sewer manhole mouth to reinforce a manhole cover support on an existing road surface. According to the present invention, the stability of the reinforced manhole cover support can be effectively improved, a road is smooth and esthetic, the existing road surface smoothness and driving comfort are ensured, and the traffic safety and service levels of urban roads are improved; moreover, the quality defect maintenance rate caused by the quality problem of a manhole cover in the later period is reduced, thereby saving on maintenance costs in the later period, reducing the influence of a road construction closing period on the surrounding social environment, reducing the influence of maintenance waste materials on the surrounding environment, and gaining relatively good economic and social benefits.
Description
BL-5368 LU501207
BACKGROUND Field of Invention The present invention provides a road foundation engineering construction technology, in particular relates to a manhole cover reinforcing structure and a method anchored by utilizing a dowel bar and an existing pavement foundation (structure and method for reinforcing manhole cover anchored with existing road surface foundation by means of dowel bars). Background of the Invention At present, lime stabilized soil, lime and fly ash stabilized soil, lime and fly ash stabilized aggregates and cement stabilized aggregates are adopted as base course structures for most urban roads in China, asphalt concrete is used as a road surface course structure, which belongs to the design of a semi-rigid plate bearing structure. The inspection well in the road is based on reinforced concrete, concrete masonry unit or brick masonry as a well body, a well periphery is backfilled with 2:8 lime soil or graded gravel, a well neck is masoned with prefabricated reinforced 1
BL-5368 LU501207 concrete or building block(brick), a nodular cast iron well ring (cover) is wrapped by C30 concrete with a width of 30-50 cm and a thickness of 25 cm, and a thickness of 4 cm is reserved for constructing an asphalt concrete surface course structure, which belongs to the design of a rigid structure. An asphalt concrete lap joint is adopted between the two structures of road and inspection well, once the settlement of rigid and flexible structure is uneven, the asphalt concrete lap joint is easily sheared and damaged under the action of dynamic load, or the surface course is cracked due to the reasons that the backfilled soil (surface course) around the well periphery is not compacted, the pouring is not complete, the mortar strength is not enough, the manhole cover installation does not conform to the requirements. If it is not repaired in time, rainwater enters the road base, and the damaged surface may gradually enlarge. Traditional manhole cover method utilizes red brick to adjust well head elevation to support the manhole cover bearing, due to the poor compression capacity of red bricks, the repaired manhole cover will still sink after being frequently rolled by vehicles.
SUMMARY The purpose of the present invention is to overcome the above-mentioned problems in the prior art, and designing a structure and method that can reinforce the manhole cover bearing. 2
BL-5368 LU501207 In order to achieve the above purpose, the present invention provides a manhole cover reinforcing structure anchored by utilizing a dowel bar and an existing pavement foundation, which is arranged at the sewer well head to reinforce the manhole cover bearing of the existing pavement; at the same time, the present invention also provides a manhole cover reinforced method anchored by utilizing a dowel bar and an existing pavement foundation. The specific solutions of the present invention achieve the following beneficial effects: the manhole cover bearing is supported by concrete pouring, due to the strong compressive capacity of the concrete, which can effectively improve the stability of the manhole cover bearing after reinforcement and make the road smooth and beautiful, the smoothness of the existing pavement and the driving comfort are ensured, and the traffic safety and the service level of urban roads are improved; meanwhile, the maintenance rate of quality defects caused by the quality problem of the manhole cover in the later period is reduced, the maintenance cost in the later period is saved, the influence of the closed period of the road construction on the surrounding social environment is reduced, the influence of maintenance waste on the surrounding environment is reduced, and better economic and social benefits are obtained.
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BL-5368 LU501207
BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic structural diagram of the installation of the manhole cover bearing and the manhole cover ring bar provided in an embodiment of the present invention; Fig. 2 is a schematic structural diagram of the manhole cover reinforcing structure provided in an embodiment of the present invention before pouring; Fig. 3 is a schematic structural diagram of the manhole cover reinforcing structure provided in an embodiment of the present invention in a pouring state.
DETAILED DESCRIPTION OF THE EMBODIMENTS As shown in Fig.1-3, a manhole cover reinforcing structure anchored by utilizing a dowel bar and an existing pavement foundation, which is arranged at the sewer wellhead 9 to reinforce the manhole cover bearing3 of the existing pavement 8, the manhole cover reinforcing structure comprises: a manhole cover bearing 3, correspondingly arranged at the sewer wellhead 9, in order to install a manhole cover 7; an annular cutting groove 1, surrounding the manhole cover bearing 3; a manhole cover ring bar 2, matched with the annular cutting groove 4
BL-5368 LU501207 1, correspondingly placed in the annular cutting groove and located below the manhole cover bearing 3; a support cushion formwork 6, arranged at the sewer wellhead 9, supporting the manhole cover bearing 3 and serve as a formwork for sealing a gap between manhole cover bearing 3 and the sewer wellhead 9, a dowel bar 4, penetrating through the manhole cover bearing 3 and extending into the manhole cover ring bar 2 to serve as a prefabricated component to connect the manhole cover bearing 3 with the manhole cover ring bar 2; a concrete 10, poured in the annular cutting groove 1, so that the manhole cover bearing 3 and the manhole cover ring bar 2 and the dowel bar 4 form a whole.
performing annular cutting on the existing pavement 8 along the outer edge of the manhole cover bearing 3 to form an annular cutting groove 1, the manhole cover ring bar 2 is arranged in the annular cutting groove 1, which is used as the supporting frame of the concrete, the manhole cover bearing 3 and the manhole cover ring bar 2 being connected through the dowel bar 4, and the manhole cover bearing 3 is supported by concrete 10 pouring in the annular cutting groove 1, due to the strong compressive capacity of concrete 10, it can effectively improve the stability of the manhole cover bearing 3 after reinforcement.
5
BL-5368 LU501207 In this embodiment, the annular cutting groove 1 is concentric with the sewer manhole cover 7, the thickness of the annular cutting groove 1 is 25 cm; and the ring width of the ring corresponding to the annular cutting groove 1 1s 30 cm.
In another embodiment, the support cushion formwork 6 is an airbag with a valve which can be inflated or deflated. The air bag is inflated as the supporting cushion formwork 6 to support the manhole cover bearing 3, which play a role of supporting the manhole cover bearing 3 and serving as a formwork, the air bag is deflated after pouring is completed, itis convenient to disassemble and use.
In this embodiment, the outside of the air bag is provided with a cushion corresponding to the manhole cover bearing 3 and the sewer wellhead 9. This cushion can be a plastic film or a woven bag, which can avoid the air bag from being adhered after concrete pouring, and ensures the service life of the air bag for recycling.
In another embodiment, the manhole cover reinforcing structure further comprises: an asphalt paving layer 11 is paved above the concrete 10, wherein the upper surface of the asphalt paving layer and the existing pavement 8 are positioned on the same horizontal plane. Asphalt paving makes the road smooth and beautiful, the smoothness and the driving comfort of the existing pavement 8 are ensured, and the transport safety and the service 6
BL-5368 LU501207 level of the urban road are improved.
In this embodiment, the height difference between the upper surface of the concrete 10 and the existing pavement 8 is 5 cm, which is used for paving asphalt.
In another embodiment, the manhole cover reinforcing structure further comprises: support barl2, at least two support bars 12 and the manhole cover bearing 3 being connected through a binding bar 13, so that the upper surface of the manhole cover bearing 3 and the existing pavement 8 are positioned on the same horizontal plane.
at least two support bars 12 are placed horizontally on the existing pavement 8, and the binding bar 13 is arranged between the support bars 12 and the manhole cover bearing 3, the upper surface of the manhole cover bearing 3 and the existing pavement 8 are posed on the same horizontal plane through the binding bar 13, so that ensure the smoothness of the existing pavement 8 after reinforcement. After concrete 10 pouring is finished, the binding bar 13 is cut off, and the support bars 12 are taken down. In another embodiment, the outer edge of the manhole cover bearing 3 has a plurality of sockets 5 corresponding to the dowel bars 4, the sockets 5 are evenly distributed in the circumferential direction of the manhole cover bearing 3; 7
BL-5368 LU501207 the dowel bar 4 is n-shaped, and at least one end of the dowel bar 4 penetrates through the socket 5 and extends into the manhole cover ring bar 2. Taking a reserved hole on the side edge of the existing manhole cover bearing 3 as the socket 5, inserting one end of the dowel bar 4 into the socket 5, and inserting the other end of the dowel bar 4 into the manhole cover ring bar 2 outside the manhole cover bearing 3 and to utilize its n-shaped structure to carry out the longitudinal spacing on the manhole cover bearing 3, so as to ensure that the manhole cover bearing 3, the manhole cover ring bar 2 and the dowel bar 4 form a whole after concrete 10 pouring is finished.
In this embodiment, the manhole cover ring bar 2 is made of steel bar with a diameter of 16, and the dowel bar 4 is made by bending a steel bar with a diameter of ¢12. The manhole cover ring bar 2 consists of two layers arranged along the top and bottom, and each layer includes two rings of ring reinforcement arranged coaxially, the stirrups are arranged along the radial direction to fix the ring reinforcements, and a plurality of stirrups are uniformly distributed in circumferential directions. a manhole cover reinforced method anchored by utilizing a dowel bar and an existing pavement foundation comprising the following steps: step S1, performing annular cutting on the existing pavement 8 along 8
BL-5368 LU501207 the outer edge of the manhole cover bearing 3 to form the annular cutting groove 1; step S2, tying the manhole cover ring bar 2 matched with the annular cutting groove 1, wherein the manhole cover ring bar 2 is correspondingly placed in the annular cutting groove 1 and positioned below the manhole cover bearing 3; step S3, arranging the support cushion formwork 6 at the sewer wellhead9; step S4, penetrating the dowel bar 4 through the manhole cover bearing 3 and extending into the manhole cover ring bars 2; step S5, the annular cutting groove 1 is poured through concrete 10. performing annular cutting on the existing pavement 8 along the outer edge of the manhole cover bearing 3 to form an annular cutting groove 1, the manhole cover ring bar 2 is arranged in the annular cutting groove 1, the manhole cover ring bar 2 is used as the supporting frame of the concrete, the manhole cover bearing 3 and the manhole cover ring bar 2 are connected 10 with the dowel bar 4, and the manhole cover bearing 3 is supported by concrete 10 pouring in the annular cutting groove 1, due to the strong compressive capacity of concrete 10, it can effectively improve the stability of the manhole cover bearing 3 after reinforcement.
In this embodiment, a hand-push type manhole cover 7 circle cutter is used for cutting by taking the center of the manhole cover 7 as the 9
BL-5368 LU501207 circle center and taking the radius of the manhole cover 7 plus 30 cm as the cutting radius, wherein the cutting thickness is 25 cm, and manual cleaning is performed. In another embodiment, in step S2, at least two support bars 12 and the manhole cover bearing 3 being connected through a binding bar 13, so that the upper surface of the manhole cover bearing 3 and the existing pavement 8 are positioned on the same horizontal plane. At least two support bars 12 are placed horizontally on the existing pavement 8, and the binding bar 13 is arranged between the support bar 12 and the manhole cover bearing 3, the upper surface of the manhole cover bearing 3 and the existing pavement 8 are positioned on the same horizontal plane through the binding bar 13, so that ensure the smoothness of the existing pavement 8 after reinforcement.
In another embodiment, the support cushion formwork 6 is an airbag with a valve for inflation or deflation. The air bag is inflated as the supporting cushion formwork 6 to support the manhole cover bearing 3, which play a role of supporting the manhole cover bearing 3 and serving as a formwork, the air bag is deflated after concrete pouring is finished, it 1s convenient to disassemble and use.
In this embodiment, the outside of the air bag is provided with a cushion corresponding to the manhole cover bearing 3 and the sewer wellhead 9. This cushion can be a plastic film or a woven bag, which can 10
BL-5368 LU501207 avoid the air bag from being adhered after concrete pouring, and ensures the service life of the air bag for recycling.
In another embodiment, the manhole cover reinforced method further comprises: step S6, after concrete 10 pouring is finished, watering, covering and maintaining are carried out, the support cushion formwork 6 is taken out after the completion of maintenance.
Specifically, after concrete 10 pouring is finished, watering, covering and maintaining are carried out for at least 7 days, the air bag shall be deflated and taken out for recycling after the completion of maintenance.
In another embodiment, the manhole cover reinforced method further comprises: step S7, paving the asphalt above the concrete 10, wherein the upper surface of the asphalt paving layer and the existing pavement 8 are positioned on the same horizontal plane.
Wherein performing concrete 10 pouring after the manhole cover ring bar 2 is installed, and C30 concrete 10 1s poured, vibrating with a vibrating needle, and the concrete 10 is poured until Scm to ground.
Filling the course layer with a thickness of Sem fine-grained asphalt, and compacting by a road roller to ensure that the upper surface and the existing road surface 8 are on the same horizontal plane.
In summary, in the present invention, in order to ensure the quality 11
BL-5368 LU501207 of the reinforcement of the manhole cover 7, The air bag is inflated as the supporting cushion formwork to support the manhole cover bearing 3, which play a role of supporting the manhole cover bearing and serving as a formwork, then pour concrete 10 to annular cutting groove 1 and then the airbag is deflated and taken out, so that the cushion material of the manhole cover bearing 3 is changed from the original red brick to the stronger concrete 10 material, so as to achieve the purpose of increasing the compressive strength. The manhole cover ring bar 2 and the dowel bar 4 are manufactured to enable the manhole cover bearing 3, the manhole cover ring bar 2 and the dowel bar 4 asa whole, when the concrete 10 is poured, the manhole cover ring bar 2 and the surrounding concrete 10 are tightly combined to ensure that the reverse tension is provided for the manhole cover 7 when vehicles pass above the manhole cover. Thereby the quality of the manhole cover 7 reinforcement is ensured, and construction maintenance and rework isreduced. The extra cost caused by the manhole cover 7 maintenance is greatly reduced, and the requirements for road quality are met.
12
Claims (8)
1. A manhole cover reinforcing structure anchored by utilizing a dowel bar and an existing pavement foundation, which is arranged at a sewer wellhead to reinforce a manhole cover bearing of an existing pavement, characterized in that the manhole cover reinforcing structure comprises: a manhole cover bearing, correspondingly arranged at the sewer wellhead, in order to install a manhole cover; an annular cutting groove, surrounding the manhole cover bearing; a manhole cover ring bar, matched with the annular cutting groove, correspondingly placed in the annular cutting groove and located below the manhole cover bearing; a support cushion formwork, arranged at the sewer wellhead, supporting the manhole cover bearing and serve as a formwork for sealing a gap between manhole cover bearing and the sewer wellhead; a dowel bar, penetrating through the manhole cover bearing and extending into the manhole cover ring bar to serve as a prefabricated component to connect the manhole cover bearing with the manhole cover ring bar; concrete, poured in the annular cutting groove, so that the manhole cover bearing and the manhole cover ring bar and the dowel bar form a whole.
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BL-5368 LU501207
2. The manhole cover reinforcing structure anchored by utilizing a dowel bar and an existing pavement foundation according to claim 1, characterized in that the support cushion formwork is an air bag, and the air bag is provided with a valve which can be inflated or deflated.
3.The manhole cover reinforcing structure anchored by utilizing a dowel bar and an existing pavement foundation according to claim 1, characterized in that the manhole cover reinforcing structure further includes: an asphalt paving layer, which is paved above the concrete, and the upper surface of the asphalt paving layer and the existing pavement are positioned on the same horizontal plane.
4 The manhole cover reinforcing structure anchored by utilizing a dowel bar and an existing pavement foundation according to claim 1, characterized in that the manhole cover reinforcing structure further includes: a support bar, at least two support bars and the manhole cover bearing being connected through a binding bar, so that the upper surface of the manhole cover bearing and the existing pavement are positioned on the same horizontal plane.
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BL-5368 LU501207
5.The manhole cover reinforcing structure anchored by utilizing a dowel bar and an existing pavement foundation according to claim 1, characterized in that the outer edge of the manhole cover bearing has a plurality of sockets corresponding to the dowel bar, the sockets are evenly distributed in the circumferential direction of the manhole cover bearing; the dowel bar is n-shaped, and at least one end of the dowel bar penetrates through the sockets and extends into the manhole cover ring bar.
6. The manhole cover reinforced method anchored by utilizing a dowel bar and an existing pavement foundation is characterized by comprising the following steps: step S1, performing annular cutting on the existing pavement along the outer edge of the manhole cover bearing to form the annular cutting groove; step S2, tying a manhole cover ring bar matched with the annular cutting groove, wherein the manhole cover ring bar is correspondingly placed in the annular cutting groove and is positioned below the manhole cover bearing; step S3, arranging the support cushion formwork at the sewer wellhead; step S4, penetrating a dowel bar through the manhole cover bearing 15
BL-5368 LU501207 and extending into the manhole cover ring bar; step S5, the annular cutting groove is poured through concrete.
7. The manhole cover reinforced method anchored by utilizing a dowel bar and an existing pavement foundation according to claim 6, characterized in that the method further comprises: step S6, after concrete pouring is finished, watering, covering and maintaining are carried out, the support cushion formwork is taken out after the completion of maintenance.
8. The manhole cover reinforced method anchored by utilizing a dowel bar and an existing pavement foundation according to claim 6, characterized in that the method further comprises: step S7, paving the asphalt above the concrete, wherein the upper surface of the asphalt paving layer and the existing pavement are positioned on the same horizontal plane.
16
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110197248.1A CN112575819A (en) | 2021-02-22 | 2021-02-22 | Manhole cover reinforcing structure and method anchored by using dowel bars and existing pavement foundation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| LU501207B1 true LU501207B1 (en) | 2022-07-05 |
Family
ID=75113948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| LU501207A LU501207B1 (en) | 2021-02-22 | 2022-01-05 | Structure and method for reinforcing manhole cover anchored with existing road surface foundation by means of dowel bars |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN112575819A (en) |
| LU (1) | LU501207B1 (en) |
| WO (1) | WO2021213099A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114703901B (en) * | 2022-02-16 | 2023-08-22 | 福建建工基础设施建设集团有限公司 | Construction method of rain sewage well lid |
| CN116145731A (en) * | 2022-12-30 | 2023-05-23 | 中铁一局集团有限公司 | Inverted anti-sedimentation manhole cover construction method |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10158389C2 (en) * | 2001-11-28 | 2003-12-11 | Bartolo Vienna | manhole cover |
| JP2010037935A (en) * | 2008-05-30 | 2010-02-18 | Fukuhara Imono Seisakusho:Kk | Manhole cover |
| KR20090132024A (en) * | 2008-06-19 | 2009-12-30 | (주)옥련건설 | Manhole repairing method and manhole repairing structure |
| US20130121763A1 (en) * | 2010-06-10 | 2013-05-16 | Polylast Systems, LLC | Manhole, roadway and walkway repair |
| CN106906847A (en) * | 2017-04-07 | 2017-06-30 | 北京特希达交通勘察设计院有限公司 | A kind of urban road inspection shaft |
| CN108222072A (en) * | 2018-02-09 | 2018-06-29 | 武汉冶建筑安装工程有限责任公司 | Reinforced construction method is risen after asphalt concrete pavement inspection shaft |
| CN209227616U (en) * | 2018-10-25 | 2019-08-09 | 江苏翔森建设工程有限公司 | A kind of inspection well cover support of high bearing capacity |
| CN211421181U (en) * | 2018-11-21 | 2020-09-04 | 杭州江润科技有限公司 | Reinforced well cover for masonry well chamber |
| CN209620110U (en) * | 2019-01-25 | 2019-11-12 | 张鸿杰 | A kind of prefabricated reinforced concrete inspection well well head |
| CN210459305U (en) * | 2019-03-05 | 2020-05-05 | 湖北乾奥建设工程有限公司 | Municipal administration well lid replacement device |
| CN110700581A (en) * | 2019-10-17 | 2020-01-17 | 广西建工集团第五建筑工程有限责任公司 | Reinforced concrete thin-wall cylindrical well template system and method for pouring thin-wall cylindrical well by using same |
-
2021
- 2021-02-22 CN CN202110197248.1A patent/CN112575819A/en active Pending
- 2021-03-19 WO PCT/CN2021/081906 patent/WO2021213099A1/en unknown
-
2022
- 2022-01-05 LU LU501207A patent/LU501207B1/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| CN112575819A (en) | 2021-03-30 |
| WO2021213099A1 (en) | 2021-10-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FG | Patent granted |
Effective date: 20220705 |