An external concrete curing system and curing method for an arch bridge

Abstract

The present invention relates to a curing system and a curing method for the external concrete of an arch bridge. When using the curing system for the external concrete of the arch bridge to cure the external concrete of the arch bridge, the curing of the spraying equipment is more convenient. For the first spraying curing of the concrete, after the concrete surface is completely wet, quickly cover it with two layers of fabric and one layer of film. On the one hand, the atomized water vapor is conducive to diffusing into the film, retaining the humid air and moisture within the two layers of fabric and one layer of film. The two layers of fabric and one layer of film have good sealing performance, and the moisture is not easily lost, enabling the concrete surface to remain wet to achieve the purpose of timely water replenishment, with better curing effect. In the later stage, only spray the two layers of fabric and one layer of film to reduce the environmental temperature difference during curing, creating a steam curing environment in the curing area to ensure the curing effect. On the other hand, it also saves water consumption, reduces costs, saves water resources, and avoids the influence of a large amount of flowing water load before the bridge is completed, making the curing process safer and not affecting the quality of the arch rib.

Description

Technical Field

[0001] The present invention relates to the technical field of the maintenance of the concrete outside the arch bridge, in particular to a maintenance system and a maintenance method for the concrete outside the arch bridge. Background Art

[0002] The traditional maintenance method for arch bridges is to wet them with water pipes and then cover them with geotextiles for moisture retention. The laying distance of the water pipes is long, and as the maintenance position changes, the water tank needs to be continuously moved along with the maintenance position. For large-span rigid-frame concrete arch bridges, the maintenance height is relatively high. If flowing water maintenance is adopted, it is difficult to ensure the water supply, the moisture retention performance of the geotextiles is poor, and it is rather troublesome to move the water tank on the arch. The long laying of the water pipes is not conducive to construction safety. At the same time, too much flowing water is an adverse factor for the rigid frame during the construction process in terms of its own weight. Summary of the Invention

[0003] The purpose of the present invention is to provide a maintenance system and a maintenance method for the concrete outside the arch bridge, aiming at the problems existing in the traditional maintenance method for arch bridges in the prior art, such as the water tank needs to be continuously moved along with the maintenance position, the long laying of the water pipes is not conducive to construction safety, and the excessive flowing water formed during maintenance has an adverse impact on the rigid frame.

[0004] In order to achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0005] A maintenance system for the concrete outside the arch bridge includes a plurality of spraying devices and a water supply device arranged at the arch crown. At least one main pressure pipeline is respectively arranged at both ends of the arch rib of the arch bridge. One end of the main pressure pipeline is communicated with the water supply device, and the other end extends to the arch foot. The arch foot end of the main pressure pipeline is closed;

[0006] The water supply device includes an arch crown platform, a water storage device and a water pump. The water storage device and the water pump are fixed on the arch crown platform. The water pump is used to pump water into the water storage device, and the water storage device supplies water to the main pressure pipeline;

[0007] Joint valves are longitudinally arranged at intervals on the main pressure pipeline. The spraying devices can be connected to the joint valves, and the spraying devices are used to spray the concrete outside the arch in the area where the connected joint valves are located.

[0008] In this solution, the water supply device is fixed to the vault, that is, the water storage tank is fixed to the vault through the vault platform, and the water pump can pump water into the water storage tank on the vault for storage; through the main pressure pipeline laid along the arch rib from the vault to both ends, the water in the water storage tank can be transported to different longitudinal positions of the arch rib through the main pressure pipeline; and joint valves are arranged at longitudinal intervals of the main pressure pipeline, so that the spraying equipment can be connected to the joint valves at different longitudinal positions of the arch rib and realize the spraying maintenance of the external concrete of the area at the longitudinal position; that is, by adopting the arch bridge external concrete maintenance system of the present invention, the water storage tank does not need to be moved along with the maintenance position, nor does it need to lay a very long water pipe, and only needs to be connected to the joint valve at the corresponding longitudinal position, and the main pressure pipeline is planned at a designated position, which has basically no impact on the construction safety. The spraying maintenance of the external concrete in the area by the spraying equipment will not accumulate a large amount of flowing water, will not have an adverse impact on the rigid framework, makes the maintenance process safer, and will not affect the quality of the arch rib.

[0009] Preferably, the arch bridge includes two arch ribs;

[0010] Each end of the arch bridge has two of the main pressure pipelines, and the two main pressure pipelines at each end are located on the arch ribs on both sides of the arch bridge, and the main pressure pipelines on both sides are symmetrically arranged.

[0011] Arranging the main pressure pipeline along the arch ribs on both sides of the arch bridge is more convenient and safe during the arrangement process, and is conducive to maintenance; and enables the main pressure pipelines on both sides of the arch bridge transversely to be symmetrically arranged, thereby ensuring the load balance of the main arch.

[0012] Preferably, the water storage tank includes four water storage buckets, and the four water storage buckets are arranged in a rectangle on the vault platform, the centers of the four water storage buckets are located at the center of the vault platform, and each water storage bucket is connected to a corresponding one of the main pressure pipelines.

[0013] Adopting the above arrangement method is beneficial to structural balance and reduces the eccentric load on the main arch.

[0014] Preferably, the bottoms of the four water storage buckets are connected by an inter-barrel water pipe to form a closed loop, which can ensure the circulating flow of the water in the four water storage buckets, ensure that the water pressure in the four water storage buckets is always the same, and reduce the eccentric load on the main arch;

[0015] and / or,

[0016] A spray pressure machine is connected between the water storage bucket and the corresponding main pressure pipeline, the spray pressure machine is connected to the corresponding water storage bucket through a main pressure connecting pipe, and the spray pressure machine is connected to the corresponding main pressure pipeline;

[0017] The water storage bucket and the corresponding main pressure pipeline are directly connected through a conventional pressure pipeline.

[0018] When the spray pressure machine does not need to boost the pressure to achieve spraying, the water storage bucket uses a conventional waterway, that is, directly conveys water to the corresponding main pressure pipeline through a conventional pressure pipeline; when the water pressure conveyed by the water storage bucket to the main pressure pipeline is insufficient, the water storage bucket conveys water to the spray pressure machine through the main pressure connecting pipe, and after being pressurized by the spray pressure machine, it is conveyed to the main pressure pipeline, and then conveyed to all parts of the arch rib longitudinally by the main pressure pipeline, which is convenient for the use of the spraying equipment.

[0019] Preferably, when a spray pressure machine is connected between the water storage bucket and the corresponding main pressure pipeline, the two main pressure pipelines on the same side are directly connected through a spare pressure connecting pipe.

[0020] When a certain spray pressure machine on the same side fails, the other spray pressure machine can boost the pressure and convey water to the main pressure pipelines at both ends on the same side to ensure normal use.

[0021] Preferably, a plurality of the spraying devices are arranged at intervals longitudinally along each arch rib;

[0022] The spraying device includes three spraying pipes arranged longitudinally along the arch rib. The three spraying pipes are respectively arranged on both sides and the transverse middle part of the arch rib. Sprayers are arranged at intervals longitudinally on each spraying pipe. The spraying pipe located in the transverse middle part of the arch rib is connected to the corresponding joint valve through an inter-pipe flexible hose, and the spraying pipes located on both sides of the arch rib are respectively connected to the spraying pipe located in the transverse middle part of the arch rib through an inter-pipe flexible hose, which can reduce the laying length of the inter-pipe flexible hose, and make the laying of the inter-pipe flexible hose more orderly, making the use safer.

[0023] The three spraying pipes arranged longitudinally along the arch rib, with sprayers arranged at intervals longitudinally on each spraying pipe, can cover a certain longitudinal range of the arch rib; and the three spraying pipes are respectively arranged on both sides and the transverse middle part of the arch rib, which can cover the transverse range of the arch rib; so that the spraying device can maintain the external concrete of the arch rib with a certain longitudinal length.

[0024] Preferably, the two ends of the inter-pipe flexible hose are provided with detachable joints, which can be detachably connected to the spraying pipe and the joint valve, facilitating transfer and use.

[0025] Preferably, each end of the arch bridge is divided into multiple working surfaces for the construction of the external concrete. The corresponding working surfaces at both ends of the arch bridge are symmetric from the arch foot to the arch top. Each working surface includes several maintenance sections longitudinally. Each arch rib is provided with one spraying device corresponding to each working surface. The spraying device can maintain the external concrete of the maintenance section within the corresponding working surface, and the spraying device can be transferred to the next maintenance section, making the transfer distance of the spraying device shorter and the transfer more convenient.

[0026] A method for curing the external concrete of an arch bridge, which uses the external concrete curing system of the arch bridge to cure the external concrete of the arch bridge. The external concrete of the arch bridge is longitudinally divided into several working surfaces, each working surface contains several curing sections, and each curing section includes a bottom plate, a web and a top plate;

[0027] The curing steps for the bottom plate, web or top plate of each curing section are as follows:

[0028] S1. After the casting of the external concrete of the bottom plate, web or top plate is completed, remove the formwork of the corresponding external concrete;

[0029] S2. By setting or moving the spray device of this working surface to the current curing section and connecting the corresponding joint valve, perform the first spray curing on the corresponding external concrete through the spray device; when the surface of the external concrete is completely wet, cover two layers of cloth and one layer of film on the surface of the external concrete and fix the two layers of cloth and one layer of film through the tie rod holes left by the fixed formwork;

[0030] S3. After the first spray curing, continuously spray the two layers of cloth and one layer of film through the spray device for at least 7 days, and the curing of the external concrete of the bottom plate, web or top plate of this curing section is completed.

[0031] For the method for curing the external concrete of the arch bridge described in the present invention, which uses the external concrete curing system of the arch bridge to cure the external concrete of the arch bridge, the water storage tank does not need to be moved along with the curing position, nor does it need to lay a long water pipe. It only needs to be connected to the joint valve at the corresponding longitudinal position. Moreover, the main pressure pipeline is planned at a designated position, which has basically no impact on construction safety. The spray device will not accumulate a large amount of flowing water during the spray curing of the external concrete in the area where it is located, and will not have an adverse impact on the rigid framework, making the curing process safer and not affecting the quality of the arch rib; the curing process is simpler. During the first spray curing of the concrete, after the surface of the concrete is completely wet, quickly cover two layers of cloth and one layer of film. The atomized water vapor is conducive to diffusing into the film, retaining the humid air and moisture inside the two layers of cloth and one layer of film. The two layers of cloth and one layer of film have good sealing performance, and the moisture is not easy to lose, so that the surface of the concrete remains wet to achieve the purpose of timely water replenishment, and the curing effect is better; in the later stage, only the two layers of cloth and one layer of film need to be sprayed, reducing the environmental temperature difference during curing, making the curing area form a steam curing environment to ensure the curing effect; in this way, it will not accumulate a large amount of flowing water, will not have an adverse impact on the rigid framework, making the curing process safer and not affecting the quality of the arch rib; on the other hand, it also saves water consumption, reduces costs and saves water resources.

[0032] Preferably, use the external concrete curing system of the arch bridge to cure the external concrete of the arch bridge;

[0033] When curing the bottom slab of the outer concrete of the arch rib, the spray pipes located on both sides of the arch rib are detachably connected to the web members of the arch rib, and the spray pipes located in the middle of the arch rib are detachably connected to the top bracing bars of the arch rib. The nozzles of the spray pipes are arranged downward, which can better cure the outer concrete of the bottom slab;

[0034] When curing the web of the outer concrete of the arch rib, the spray pipes are all detachably connected to the top bracing bars of the arch rib. The nozzles of the spray pipes are arranged downward, which can better cure the outer concrete of the web;

[0035] When curing the top slab of the outer concrete of the arch rib, the spray pipes are all detachably connected to the suspension brackets above the top slab of the arch rib. The nozzles of the spray pipes are arranged upward. The spraying range of the upward-facing nozzles is wider, which can better cure the outer concrete of the top slab.

[0036] When performing the above-mentioned curing construction on the outer concrete of the bottom slab, web and top slab, the spray pipes are arranged by utilizing the self-structure of the arch rib or the suspension brackets required for construction, such as the suspension brackets, so as to avoid adding unnecessary loads and erecting unnecessary brackets, making the construction simpler, safer and with lower costs.

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

[0038] 1. For the curing system of the outer concrete of the arch bridge of the present invention, the water supply device is fixed at the arch crown. The water can be pumped into the water storage tank of the water supply device at the arch crown through the water pump for storage. Through the main pressure pipeline laid along the arch rib from the arch crown to both ends, the water in the water storage tank can be transported to different longitudinal positions of the arch rib through the main pressure pipeline, so that the spraying equipment can access the joint valves arranged on the main pressure pipeline at different longitudinal positions of the arch rib to realize the spraying and curing of the outer concrete in the area where the longitudinal position is located. The water storage tank of this curing system does not need to be moved along with the curing position, nor does it need to lay a long water pipe. It only needs to access the joint valve at the corresponding longitudinal position. Moreover, the main pressure pipeline is planned at a designated position, which has basically no impact on the construction safety. The spraying and curing of the outer concrete in the area by the spraying equipment will not accumulate a large amount of flowing water and will not have an adverse impact on the rigid framework, making the curing process safer and not affecting the quality of the arch rib.

[0039] 2. For the maintenance method of the external concrete of the arch bridge in the present invention, the external concrete of the arch bridge is maintained by using the maintenance system for the external concrete of the arch bridge. The maintenance of the spraying equipment is more convenient. For the first spraying maintenance of the concrete, after the surface of the concrete is completely wet, two-layer cloth and one-layer film are quickly covered. On the one hand, the atomized water vapor is conducive to diffusing into the film, retaining the humid air and moisture inside the two-layer cloth and one-layer film. The two-layer cloth and one-layer film have good sealing performance, and the moisture is not easy to lose, so that the surface of the concrete remains wet to achieve the purpose of timely water replenishment, and the maintenance effect is better. In the later stage, only the two-layer cloth and one-layer film need to be sprayed to reduce the environmental temperature difference during maintenance, so that a steam curing environment is formed in the maintenance area to ensure the maintenance effect. On the other hand, the water consumption is also saved, the cost is reduced, the water resources are saved, and the influence of a large amount of flowing water load before the bridge is completed is avoided, making the maintenance process safer and not affecting the quality of the arch rib. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 is a side elevation layout schematic diagram of the maintenance system for the external concrete of the arch bridge described in the present invention on the arch;

[0041] Figure 2 is a plan layout schematic diagram of the maintenance system for the external concrete of the arch bridge described in the present invention on the arch;

[0042] Figure 3 is a layout schematic diagram of the maintenance system for the external concrete of the arch bridge described in the present invention;

[0043] Figure 4 is a layout schematic diagram of the water supply device;

[0044] Figure 5 is Figure 4 a partial enlarged schematic diagram at circle A;

[0045] Figure 6 is a layout schematic diagram of the spraying equipment;

[0046] Figure 7 is a layout schematic diagram of the maintenance bottom plate of the spraying equipment;

[0047] Figure 8 is a layout schematic diagram of the maintenance web of the spraying equipment;

[0048] Figure 9 is a layout schematic diagram of the maintenance top plate of the spraying equipment;

[0049] Figure 10 is a schematic diagram of the external concrete of the bottom plate covered with two-layer cloth and one-layer film;

[0050] Figure 11 is a top view schematic diagram of the external concrete covered with two-layer cloth and one-layer film.

[0051] Icons: 1 - water supply device; 11 - water storage bucket; 12 - vault platform; 13 - inter-bar water pipe; 14 - spray press; 15 - conventional pressure pipeline; 16 - standby pressure connection pipe; 17 - main pressure connection pipe; 18 - tee; 19 - valve; 2 - main pressure pipeline; 21 - joint valve; 31 - first working surface; 32 - second working surface; 33 - third working surface; 34 - fourth working surface; 41 - inter-pipe hose; 42 - spray pipe; 421 - nozzle; 5 - arch rib; 51 - upper chord pipe; 52 - lower chord pipe; 53 - upper chord channel; 54 - bottom plate; 55 - web; 551 - web member; 56 - top plate; 561 - top horizontal tie rod; 57 - suspension bracket; 61 - first curing section; 62 - second curing section; 63 - third curing section; 64 - fourth curing section; 71 - two-layer cloth and one-layer film; 72 - wooden slats; 73 - tie rod; 74 - iron wire. Detailed implementation

[0052] The present invention will be described in detail below with reference to the accompanying drawings.

[0053] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0054] Embodiment 1

[0055] This embodiment provides an external concrete curing system for an arch bridge, as Figures 1-4 shown, including a plurality of spray devices and a water supply device 1 provided at the arch top. At least one main pressure pipeline 2 is provided at each end of the arch rib 5 of the arch bridge. One end of the main pressure pipeline 2 communicates with the water supply device 1, and the other end extends to the arch foot. The arch foot end of the main pressure pipeline 2 is closed;

[0056] The water supply device 1 includes a vault platform 12, a water storage device and a water pump. The water storage device and the water pump are fixed on the vault platform 12. The water pump is used to pump water into the water storage device, and the water storage device supplies water to the main pressure pipeline 2;

[0057] Joint valves 21 are longitudinally spaced on the main pressure pipeline 2. The spray devices can be connected to the joint valves 21, and the spray devices are used to spray the external concrete in the area where the connected joint valves 21 are located.

[0058] In this solution, the number of spray devices can be selected according to the actual situation. The spray devices can adopt existing technologies as long as they can achieve spray curing. The water supply device 1 is fixed to the vault, that is, the water storage tank is fixed to the vault through the vault platform 12. The water can be pumped into the water storage tank at the vault through the water pump for storage; through the main pressure pipeline 2 laid along the arch rib 5 from the vault to both ends, the water in the water storage tank can be transported to different longitudinal positions of the arch rib 5 through the main pressure pipeline 2; and joint valves 21 are longitudinally arranged at intervals on the main pressure pipeline 2, so that the spray devices can be connected to the joint valves 21 at different longitudinal positions of the arch rib 5 and realize spray curing of the external concrete in the area at the corresponding longitudinal position; that is, by adopting the arch bridge external concrete curing system of the present invention, the water storage tank does not need to be moved along with the curing position, nor does it need to lay a very long water pipe, and only needs to be connected to the joint valve 21 at the corresponding longitudinal position. Moreover, the main pressure pipeline 2 is planned at a designated position, which basically has no impact on construction safety. The spray curing of the external concrete in the area by the spray device will not accumulate a large amount of flowing water and will not have an adverse impact on the rigid framework, making the curing process safer and not affecting the quality of the arch rib 5.

[0059] In this embodiment, a plurality of the spray devices can be longitudinally arranged at intervals along each arch rib 5;

[0060] As a preferred implementation manner, the spray device includes three spray pipes 42 longitudinally arranged along the arch rib 5. The three spray pipes 42 are respectively arranged on both sides and the transverse middle of the arch rib 5. As Figure 6 shown, spray nozzles 421 are longitudinally arranged at intervals on each spray pipe 42. The three spray pipes 42 longitudinally arranged along the arch rib 5, and spray nozzles 421 are longitudinally arranged at intervals on each spray pipe 42, which can cover a certain longitudinal range of the arch rib 5; and the three spray pipes 42 are respectively arranged on both sides and the transverse middle of the arch rib 5, which can cover the transverse range of the arch rib 5; so that the spray device can cure the external concrete of the arch rib 5 with a certain longitudinal length.

[0061] And the spray pipe 42 located in the transverse middle of the arch rib 5 is connected to the corresponding joint valve 21 through an inter-pipe hose 41. The spray pipes 42 located on both sides of the arch rib 5 are respectively connected to the spray pipe 42 located in the transverse middle of the arch rib 5 through inter-pipe hoses 41, which can reduce the laying length of the inter-pipe hoses 41, and make the laying of the inter-pipe hoses 41 more orderly, making the use safer. In addition, detachable joints are provided at both ends of the inter-pipe hose 41, which can be detachably connected to the spray pipe 42 and the joint valve 21 for easy conversion.

[0062] In this embodiment, when the concrete is externally wrapped for construction on multiple working surfaces at each end of the arch bridge, and the corresponding working surfaces at both ends of the arch bridge are symmetric from the arch feet to the arch crown, and each working surface includes several curing sections longitudinally, one spraying device is provided for each working surface corresponding to each arch rib 5. The spraying device can cure the externally wrapped concrete of the curing sections within the corresponding working surface, and at least one joint valve 21 is required for each curing section to access water from the main pressure pipeline 2, so that the spraying device can be transferred to the next curing section for curing, making the transfer distance of the spraying device shorter and the transfer more convenient.

[0063] Embodiment 2

[0064] This embodiment provides a curing system for the externally wrapped concrete of an arch bridge, as Figures 1-5 shown, which is a specific setting method for a double-arch rib arch bridge.

[0065] As Figure 2 and Figure 3 shown, each end of the arch bridge has two main pressure pipelines 2. One end of the main pressure pipeline 2 is connected to the water supply device 1, and the other end extends to the arch feet. The arch foot end of the main pressure pipeline 2 is closed. The main pressure pipeline 2 is longitudinally provided with joint valves 21 at intervals, such as one joint valve 21 is provided every 10 - 15 m. The joint valve 21 can be connected to a spraying device or a conventional water pipe for conventional water use other than curing. The two main pressure pipelines 2 at each end are located on the arch ribs 5 on both sides of the arch bridge, making the layout process more convenient and safe, and facilitating maintenance. The two main pressure pipelines 2 on both sides are symmetrically arranged, thereby ensuring the load balance of the main arch.

[0066] As Figure 3 and Figure 4 shown, Figure 3 the up-down direction in 3 is the transverse direction of the arch bridge. The water storage device includes four water storage buckets 11 with a volume of 10 m

[0067] As Figure 4 and Figure 5As shown in the figure, the water storage bucket 11 is directly connected to the corresponding main pressure pipeline 2 through a conventional pressure pipeline 15. The conventional pressure pipeline 15 needs to use a high-pressure resistant pipeline. When the spray pressure machine 14 is not required to boost the pressure for spraying, the water storage bucket 11 uses a conventional waterway. There is a water delivery line 1: that is, it can directly deliver water to the corresponding main pressure pipeline 2 through the conventional pressure pipeline 15. And a spray pressure machine 14 is connected between the water storage bucket 11 and the corresponding main pressure pipeline 2. The spray pressure machine 14 is connected to the corresponding main pressure pipeline 2 through a main pressure connecting pipe 17. When the water pressure delivered from the water storage bucket 11 to the main pressure pipeline 2 is insufficient, there is a water delivery line 2: the water storage bucket 11 can deliver water to the spray pressure machine 14 through the main pressure connecting pipe 17, and after being pressurized by the spray pressure machine 14, it is delivered to the main pressure pipeline 2, and then delivered to various longitudinal parts of the arch rib 5 by the main pressure pipeline 2, which is convenient for the use of the spraying equipment.

[0068] As Figure 5 shown, a tee 18 and a valve 19 are successively arranged on the main pressure connecting pipe 17 between the water storage bucket 11 and the spray pressure machine 14. A tee 18 is arranged on the main pressure pipeline 2. The tee 18 of the main pressure pipeline 2 is connected to one end of the conventional pressure pipeline 15, and the other end of the conventional pressure pipeline 15 is connected to the tee 18 of the main pressure connecting pipe 17. And a valve 19 is also arranged between the spray pressure machine 14 and the tee 18 of the main pressure pipeline 2 connected to the conventional pressure pipeline 15. A valve 19 is also arranged on the conventional pressure pipeline 15. Through the positional relationship of these three valves 19 and the tees 18 at both ends of the conventional pressure pipeline 15, the functions of the above-mentioned water delivery line 1 and water delivery line 2 can be realized.

[0069] And as Figure 4 and Figure 5 shown, when a spray pressure machine 14 is connected between the water storage bucket 11 and the corresponding main pressure pipeline 2, the two main pressure pipelines 2 on the same side are directly connected through a spare pressure connecting pipe 16. As Figure 5 shown, the position where the spare pressure connecting pipe 16 is connected to the main pressure pipeline 2 is in the direction of the arch foot from the tee 18 at the end of the conventional pressure pipeline 15. When a certain spray pressure machine 14 on the same side fails, the other spray pressure machine 14 can boost the pressure and deliver water to the main pressure pipelines 2 at both ends on the same side to ensure normal use.

[0070] In this embodiment, when the concrete construction is carried out by outsourcing in multiple working faces at each end of the arch bridge, the corresponding working faces at both ends of the arch bridge are symmetric from the arch foot to the arch top, and each working face includes several maintenance sections longitudinally. As Figure 1As shown in the figure, from the arch feet to the arch crown at both ends of the arch rib 5, it is successively divided into the first working surface 31, the second working surface 32, the third working surface 33 and the fourth working surface 34. And for each of the two arch ribs 5 corresponding to the first working surface 31, there are several first curing sections 61. And so on, for each of the two arch ribs 5 corresponding to the second working surface 32, there are several second curing sections 62. For each of the two arch ribs 5 corresponding to the third working surface 33, there are several third curing sections 63. For each of the two arch ribs 5 corresponding to the fourth working surface 34, there are several fourth curing sections 64.

[0071] For each arch rib 5, one spraying device is provided corresponding to each working surface. The spraying device can cure the external concrete of the curing sections within the corresponding working surface. As Figure 1 and Figure 2 shown in the figure, one spraying device is provided in each of the first curing section 61, the second curing section 62, the third curing section 63 and the fourth curing section 64 of each arch rib 5. The spraying device can be transferred to the next curing section of the corresponding working surface, so that the transfer distance of the spraying device is shorter and the transfer is more convenient.

[0072] As a preferred implementation manner, the spraying device includes three spraying pipes 42 arranged longitudinally along the arch rib 5. Each spraying pipe 42 is 20 m long. The three spraying pipes 42 are respectively arranged on both sides and the transverse middle part of the arch rib 5. As Figure 6 shown in the figure, spray nozzles 421 are arranged at longitudinal intervals on each spraying pipe 42. The spray nozzles 421 are arranged at intervals of 1 - 1.5 m. The spray nozzles 421 can be of the scattered or rotary spraying type. The rotary spraying type nozzles can adjust the spraying position according to actual needs to meet the spraying and curing requirements of each part. The three spraying pipes 42 arranged longitudinally along the arch rib 5, with spray nozzles 421 arranged at longitudinal intervals on each spraying pipe 42, can cover a certain longitudinal range of the arch rib 5. And the three spraying pipes 42 are respectively arranged on both sides and the transverse middle part of the arch rib 5, which can cover the transverse range of the arch rib 5. So that the spraying device can cure the external concrete of the arch rib 5 with a certain longitudinal length.

[0073] And the spraying pipe 42 located in the transverse middle part of the arch rib 5 is connected to the corresponding joint valve 21 through an inter-pipe hose 41. The spraying pipes 42 located on both sides of the arch rib 5 are respectively connected to the spraying pipe 42 located in the transverse middle part of the arch rib 5 through inter-pipe hoses 41, which can reduce the laying length of the inter-pipe hoses 41 and make the laying of the inter-pipe hoses 41 more orderly, making the use safer. In addition, detachable joints are provided at both ends of the inter-pipe hose 41, which can be detachably connected to the spraying pipe 42 and the joint valve 21 for convenient transfer. The inter-pipe hose 41 can adopt a 10 m standard pipe, which is convenient for procurement and replacement in case of damage.

[0074] Embodiment 3

[0075] This embodiment provides a method for curing the concrete outside the arch bridge. The concrete outside the arch bridge is cured by using the curing system for the concrete outside the arch bridge described in Embodiment 1 and Embodiment 2. The concrete outside the arch bridge is divided into several working faces longitudinally, each working face contains several curing sections, and each curing section includes a bottom plate 54, a web 55 and a top plate 56;

[0076] The curing steps for the bottom plate 54, the web 55 or the top plate 56 of each curing section are as follows:

[0077] S1. After the casting of the concrete outside the corresponding bottom plate 54, web 55 or top plate 56 is completed, the formwork of the corresponding concrete outside is removed;

[0078] S2. By setting or moving the spraying device of this working face to the current curing section and connecting the corresponding joint valve 21, the corresponding concrete outside is subjected to the first spraying curing through the spraying device; after the surface of the concrete outside is completely wet, two-layer cloth and one-layer film 71 is covered on the surface of the concrete outside and fixed through the pull rod holes left by the fixed formwork; as Figure 10 and 11 shown, Figure 10 shows the covering and fixing of the two-layer cloth and one-layer film 71 for the concrete outside the bottom plate 54. After the two-layer cloth and one-layer film 71 covers the concrete outside, wooden strips 72 are arranged longitudinally along the curing section. After the pull rod 73 passes through the pull rod holes left by the fixed formwork, it is fixed on the wooden strips 72 to press the two-layer cloth and one-layer film 71 on the concrete outside, and is connected to the construction platform below through iron wires 74. This method of fixing the two-layer cloth and one-layer film 71 through the pull rod holes left by the fixed formwork can avoid causing new damage to the concrete outside the bottom plate 54 due to the fixing of the two-layer cloth and one-layer film 71.

[0079] S3. After the first spraying curing, the two-layer cloth and one-layer film 71 is sprayed through the spraying device for at least 7 consecutive days, and the curing of the concrete outside the bottom plate 54, the web 55 or the top plate 56 of this curing section is completed.

[0080] For the maintenance method of the concrete outside the arch bridge in this embodiment, the concrete outside the arch bridge is maintained by using the maintenance system for the concrete outside the arch bridge. The water storage device does not need to be moved along with the maintenance position, nor does it need to lay a long water pipe. It only needs to be connected to the joint valve 21 at the corresponding longitudinal position. Moreover, the main pressure pipeline 2 is planned at a designated position, which has basically no impact on the construction safety. The spraying equipment will not accumulate a large amount of flowing water during the spraying maintenance of the concrete outside the arch bridge in the area where it is located, and will not have an adverse impact on the rigid framework, making the maintenance process safer and not affecting the quality of the arch rib 5. Moreover, the maintenance process is simpler. For the first spraying maintenance of the concrete, after the concrete surface is completely wet, quickly cover it with two layers of cloth and one layer of film 71. The atomized water vapor is conducive to diffusing into the film, retaining the moist air and moisture in the two layers of cloth and one layer of film 71. The two layers of cloth and one layer of film have good sealing performance, and the moisture is not easy to lose, so that the concrete surface remains wet to achieve the purpose of timely water replenishment, and the maintenance effect is better. In the later stage, only the two layers of cloth and one layer of film 71 need to be sprayed to reduce the environmental temperature difference during maintenance, so that a steam curing environment is formed in the maintenance area to ensure the maintenance effect. In this way, a large amount of flowing water will not accumulate, and it will not have an adverse impact on the rigid framework, making the maintenance process safer and not affecting the quality of the arch rib 5. On the other hand, it also saves water consumption, reduces costs, and saves water resources.

[0081] When maintaining the bottom plate 54 of the concrete outside the arch rib 5, the spray pipes 42 on both sides of the arch rib 5 are detachably connected to the web members 551 of the arch rib 5, and the spray pipes 42 in the middle of the arch rib 5 are detachably connected to the top parallel link 561 of the arch rib 5. The nozzles 421 of the spray pipes 42 are arranged downward, which can better maintain the concrete outside the bottom plate 54, as Figure 7 shown;

[0082] When maintaining the web 55 of the concrete outside the arch rib 5, the spray pipes 42 are all detachably connected to the top parallel link 561 of the arch rib 5. The nozzles 421 of the spray pipes 42 are arranged downward, which can better maintain the concrete outside the web 55, as Figure 8 shown;

[0083] When maintaining the top plate 56 of the concrete outside the arch rib 5, the spray pipes 42 are all detachably connected to the suspension bracket 57 above the top plate 56 of the arch rib 5. The nozzles 421 of the spray pipes 42 are arranged upward. The spraying range of the upwardly arranged nozzles 421 is wider, which can better maintain the concrete outside the top plate 56, as Figure 9 shown.

[0084] When curing the concrete wrapped outside the bottom plate 54, web plate 55 and top plate 56 as described above, spray pipes 42 are arranged by using the structure of the arch rib 5 itself or the suspension brackets 57 required for construction, so as to avoid adding unnecessary loads and erecting unnecessary brackets, making the construction simpler, safer and with lower costs.

[0085] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An external concrete curing system for an arch bridge, characterized in that, It includes several spray devices and a water supply device (1) provided at the vault. At both ends of the arch rib (5) of the arch bridge, at least one main pressure pipeline (2) is provided. One end of the main pressure pipeline (2) is connected to the water supply device (1), and the other end extends to the arch foot. The arch foot end of the main pressure pipeline (2) is closed; The water supply device (1) includes a vault platform (12), a water storage tank and a water pump. The water storage tank and the water pump are fixed on the vault platform (12). The water pump is used to pump water into the water storage tank, and the water storage tank supplies water to the main pressure pipeline (2); Joint valves (21) are longitudinally and spacedly arranged on the main pressure pipeline (2). The spray device can be connected to the joint valve (21), and the spray device is used to spray the external concrete of the area where the connected joint valve (21) is located.

2. The arch bridge outer concrete curing system according to claim 1, wherein, The arch bridge includes two arch ribs (5); Each end of the arch bridge has two main pressure pipelines (2). The two main pressure pipelines (2) at each end are located on the arch ribs (5) on both sides of the arch bridge, and the main pressure pipelines (2) on both sides are symmetrically arranged.

3. The arch bridge external concrete curing system according to claim 2, characterized in that, The water storage tank includes four water storage barrels (11). The four water storage barrels (11) are arranged in a rectangle on the vault platform (12). The centers of the four water storage barrels (11) are located at the center of the vault platform (12). Each water storage barrel (11) is connected to a corresponding main pressure pipeline (2).

4. The arch bridge external concrete curing system according to claim 3, characterized in that, The bottoms of the four water storage barrels (11) are connected by an inter-barrel water pipe (13) to form a closed loop; and / or, A spray pressure machine (14) is connected between the water storage barrel (11) and the corresponding main pressure pipeline (2). The spray pressure machine (14) is connected to the corresponding water storage barrel (11) through a main pressure connection pipe (17), and the spray pressure machine (14) is connected to the corresponding main pressure pipeline (2); The water storage barrel (11) is directly connected to the corresponding main pressure pipeline (2) through a conventional pressure pipeline (15).

5. The arch bridge external concrete curing system according to claim 4, wherein, When a spray pressure machine (14) is connected between the water storage barrel (11) and the corresponding main pressure pipeline (2), the two main pressure pipelines (2) on the same side are directly connected through a spare pressure connection pipe (16).

6. The curing system for the externally wrapped concrete of an arch bridge according to any one of claims 1-5, characterized in that, Several of the spray devices are longitudinally and spacedly arranged along each arch rib (5); The spray device includes three spray pipes (42) longitudinally arranged along the arch rib (5). The three spray pipes (42) are respectively arranged on both sides and the transverse middle part of the arch rib (5). Nozzles (421) are longitudinally and spacedly arranged on each spray pipe (42). The spray pipe (42) located in the transverse middle part of the arch rib (5) is connected to the corresponding joint valve (21) through an inter-pipe hose (41). The spray pipes (42) located on both sides of the arch rib (5) are respectively connected to the spray pipe (42) located in the transverse middle part of the arch rib (5) through an inter-pipe hose (41).

7. The arch bridge external concrete curing system according to claim 6, wherein, Detachable joints are provided at both ends of the inter-pipe hose (41).

8. The arch bridge external concrete curing system according to claim 6, characterized in that, The two ends of the arch bridge are each divided into multiple working surfaces for the construction of the external concrete cladding. The corresponding working surfaces at the two ends of the arch bridge are symmetric from the arch feet to the crown. Each working surface includes several curing sections longitudinally. One spray device is provided for each rib (5) corresponding to each working surface. The spray device can cure the external concrete of the curing sections within the corresponding working surface, and the spray device can be transferred to the next curing section.

9. A method for curing the concrete wrapped outside an arch bridge, characterized in that, When curing the external concrete of the arch bridge using the external concrete curing system for arch bridges as described in any one of claims 1-8, the external concrete of the arch bridge is divided into several working surfaces longitudinally. Each working surface includes several curing sections. Each curing section includes a bottom plate (54), a web (55), and a top plate (56); The curing steps for the bottom plate (54), web (55), or top plate (56) of each curing section are as follows: S1. After the pouring of the external concrete of the bottom plate (54), web (55), or top plate (56) is completed, the formwork for the corresponding external concrete is removed; S2. By setting or reinstalling the spray device of this working surface to the current curing section and connecting the corresponding joint valve (21), the corresponding external concrete is subjected to the first spray curing by the spray device; after the surface of the external concrete is completely wet, a two-layer fabric and one-layer film (71) is covered on the surface of the external concrete and fixed through the tie rod holes left by the fixed formwork; S3. After the first spray curing, the two-layer fabric and one-layer film (71) is sprayed by the spray device for at least 7 consecutive days, and the curing of the external concrete of the bottom plate (54), web (55), or top plate (56) of this curing section is completed.

10. The curing method of the concrete outside the arch bridge according to claim 9, characterized in that, When curing the external concrete of the arch bridge using the external concrete curing system for arch bridges as described in any one of claims 6-8; When curing the bottom plate (54) of the external concrete of the rib (5), the spray pipes (42) on both sides of the rib (5) are detachably connected to the web members (551) of the rib (5), and the spray pipes (42) in the middle of the rib (5) are detachably connected to the top bracing bar (561) of the rib (5). The nozzles (421) of the spray pipes (42) are arranged downward; When curing the web (55) of the external concrete of the rib (5), the spray pipes (42) are all detachably connected to the top bracing bar (561) of the rib (5). The nozzles (421) of the spray pipes (42) are arranged downward; When curing the top plate (56) of the external concrete of the rib (5), the spray pipes (42) are all detachably connected to the suspension bracket (57) above the top plate (56) of the rib (5). The nozzles (421) of the spray pipes (42) are arranged upward.

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