CN111676829A - Spraying maintenance system and method for cast-in-place box girder of viaduct bridge - Google Patents
Spraying maintenance system and method for cast-in-place box girder of viaduct bridge Download PDFInfo
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- CN111676829A CN111676829A CN202010608411.4A CN202010608411A CN111676829A CN 111676829 A CN111676829 A CN 111676829A CN 202010608411 A CN202010608411 A CN 202010608411A CN 111676829 A CN111676829 A CN 111676829A
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- box girder
- water
- place box
- water supply
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/24—Safety or protective measures preventing damage to building parts or finishing work during construction
- E04G21/246—Safety or protective measures preventing damage to building parts or finishing work during construction specially adapted for curing concrete in situ, e.g. by covering it with protective sheets
Abstract
The invention relates to a spraying maintenance system and a method for a cast-in-place box girder of an viaduct, wherein the system comprises the following components: the fixing frames are arranged on the side parts of the box girder templates; a water supply pipeline laid on the fixing frame; a plurality of first spray heads installed on the water supply pipeline; the water collecting tank is arranged close to the cast-in-situ box girder and filled with water; with the booster pump of header tank intercommunication, the booster pump passes through raceway and supply channel intercommunication, and water pump feed to the supply channel in with the header tank through the booster pump, and water in the supply channel and then spout the top surface in order to realize the maintenance that sprays of cast-in-place case roof beam to the top surface of cast-in-place case roof beam from the delivery port of first shower nozzle. In the process of maintaining the cast-in-place box girder, the box girder template is utilized to guide the water sprayed to the top surface of the cast-in-place box girder to the surface of the cast-in-place box girder, so that the surface wetting effect of the cast-in-place box girder is more uniform, the water evaporation is slow, the vertical surface maintenance effect of the cast-in-place box girder is improved before the cast-in-place box girder is hardened, the water in the cast-in-place box girder is kept, and the maintenance effect is good.
Description
Technical Field
The invention relates to the field of building construction engineering, in particular to a spraying maintenance system and a maintenance method for a cast-in-place box girder of an elevated bridge.
Background
With the rapid development of urban construction, original streets are difficult to widen, so that the construction of the overhead bridge well relieves traffic pressure. The box girder is a structural form adopted in the construction of the viaduct girder and is an important bearing component, however, the construction environment in the city is limited, and the construction of many viaduct girders does not have enough sites for prefabricating the box girder, so that a cast-in-place construction method is generally adopted.
In the cast-in-place construction method, the maintenance of the concrete is beneficial to ensuring the strength and the structural stability of the concrete, and has important influence on the engineering quality, and the cast-in-place box girder is limited by the field and often has the phenomenon of incomplete maintenance.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a spraying maintenance system and a maintenance method for a cast-in-place box beam of an viaduct, and solves the problem that the existing cast-in-place box beam is limited by a place and is not maintained in place.
The technical scheme for realizing the purpose is as follows:
the invention provides a spraying maintenance system of a cast-in-place box girder of a viaduct, wherein the cast-in-place box girder is poured and formed in a box girder template, and the spraying maintenance system comprises:
the fixing frames are arranged on the side parts of the box girder template and close to the top surface of the cast-in-place box girder, and are arranged at intervals along the length direction of the cast-in-place box girder;
the water supply pipeline is laid on the fixing frame, and the laying direction of the water supply pipeline is consistent with the length direction of the cast-in-place box girder;
the water outlets of the first spray heads face the top surface of the cast-in-place box girder;
the water collecting tank is arranged close to the cast-in-place tank beam, the water collecting tank is arranged on the ground, and water is filled in the water collecting tank; and
and the booster pump is communicated with the water supply pipeline through a water pipe, the booster pump pumps water in the water collecting tank to the water supply pipeline, and water in the water supply pipeline is sprayed to the top surface of the cast-in-situ box girder from a water outlet of the first spray head so as to realize the spray maintenance of the cast-in-situ box girder.
According to the spray maintenance system, the box girder template is not detached in the process of maintaining the cast-in-place box girder, water sprayed to the top surface of the cast-in-place box girder is guided to the surface of the cast-in-place box girder by the box girder template, the adhesiveness of the box girder template and the cast-in-place box girder is better than that of a moisture-preserving layer wrapped or attached in the later period, so that the surface wetting effect of the cast-in-place box girder is more uniform, the moisture evaporation is slow, the vertical surface maintenance effect of the cast-in-place box girder is improved before the cast-in-place box girder is hardened, the moisture in the cast-in-place box girder is kept, the cast-in-place box girder can obtain a good maintenance effect, and the.
The spraying maintenance system of the cast-in-place box girder of the viaduct is further improved in that the spraying maintenance system further comprises a wet curtain paved on the top surface of the cast-in-place box girder, and the wet curtain covers the top surface of the cast-in-place box girder.
The spraying maintenance system of the cast-in-place box girder of the viaduct is further improved in that the spraying maintenance system further comprises a geotextile layer covering the wet curtain.
The spraying maintenance system of the cast-in-place box girder of the viaduct is further improved in that the spraying maintenance system further comprises a pressing strip fixedly arranged on the top surface of the box girder template, a pressing part extending towards the top surface of the cast-in-place box girder is formed on the pressing strip, and the pressing part is located on the geotechnical cloth layer.
The spraying maintenance system of the cast-in-place box girder of the viaduct is further improved in that an abdomen template is further arranged inside the cast-in-place box girder, a cavity is formed inside the abdomen template, and openings are formed at two ends of the cavity;
the spraying maintenance system also comprises water supply branch pipes paved in the cavity, the paving direction of the water supply branch pipes is consistent with the length direction of the cast-in-place box girder, a plurality of second spray heads are arranged on the water supply branch pipes, and water spray ports of the second spray heads face to the top of the abdomen formwork;
the water supply branch pipe is communicated with the water delivery pipe, so that the booster pump can supply water into the water supply branch pipe through the water delivery pipe, and the water in the water supply branch pipe is sprayed to the top of the abdomen template from the water spray opening of the second spray head.
The invention also provides a spraying maintenance method of the cast-in-place box girder of the viaduct, which comprises the following steps:
erecting a box girder template, and pouring concrete into the box girder template to form a cast-in-place box girder;
providing a plurality of fixing frames, connecting the fixing frames to the side parts of the box girder template and arranging the fixing frames close to the top surface of the cast-in-place box girder, and arranging the fixing frames at intervals along the length direction of the cast-in-place box girder when the fixing frames are connected;
providing a water supply pipeline, and paving the water supply pipeline on the fixing frame, wherein the paving direction of the water supply pipeline is consistent with the length direction of the cast-in-place box girder;
providing a plurality of first spray heads, installing the first spray heads on the water supply pipeline, and arranging the water outlets of the first spray heads towards the top surface of the cast-in-place box beam;
providing a water collecting tank filled with water, and placing the water collecting tank on the ground and close to the cast-in-place tank beam;
providing a booster pump, communicating the booster pump with the water collecting tank, and communicating the booster pump with the water supply pipeline through a water delivery pipe; and
the booster pump is started, water in the water collecting tank is pumped to the water supply pipeline through the booster pump, and water in the water supply pipeline is sprayed to the top surface of the cast-in-place box girder through the water outlet of the first spray head so as to realize the spray maintenance of the cast-in-place box girder.
The spraying maintenance method is further improved in that the method further comprises the following steps:
setting spraying time, and closing the booster pump when the running time of the booster pump reaches the spraying time;
setting interval time, and starting the booster pump according to the interval time to spray the cast-in-place box girder.
The spraying maintenance method is further improved in that the method further comprises the following steps: and after the cast-in-place box girder is hardened, finishing maintenance and dismantling the water supply pipeline and the box girder template.
The spraying maintenance method is further improved in that when the box girder template is erected, an abdomen template is erected in the box girder template, a cavity is formed inside the abdomen template, and openings are formed at two ends of the cavity;
providing water supply branch pipes, and paving the water supply branch pipes in the cavity, wherein the paving direction of the water supply branch pipes is consistent with the length direction of the cast-in-place box girder;
providing a plurality of second spray heads, installing the second spray heads on the water supply branch pipes, wherein water spray ports of the second spray heads are arranged towards the top of the abdomen formwork;
and the water supply branch pipe is communicated with the water delivery pipe, so that water is pumped into the water supply branch pipe through the booster pump, and the water in the water supply branch pipe is sprayed to the top of the abdomen template from the water spray opening of the second spray head.
The spraying maintenance method is further improved in that the method further comprises the following steps:
providing a settling tank with a top opening, placing the settling tank on the ground and corresponding to the position of the end part of the cast-in-place box girder, and collecting water for spray maintenance flowing out of the end part of the cast-in-place box girder through the settling tank;
a water outlet is arranged at the upper part of the settling tank;
and the water outlet is communicated with a water guide pipe, and the other end of the water guide pipe is communicated with the water collecting tank.
Drawings
Fig. 1 is a schematic structural view of a spray maintenance system of a cast-in-place box girder of an elevated bridge in a use state.
Fig. 2 is a partially enlarged schematic view of a portion a in fig. 1.
Fig. 3 is a structural schematic diagram of a cast-in-place box girder viewed from the top in a use state of the spray maintenance system of the cast-in-place box girder of the viaduct.
Fig. 4 is a schematic structural view of another preferred embodiment of the spray maintenance system for cast-in-place box girders for viaducts in a use state according to the present invention.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
Referring to fig. 1, the invention provides a spray maintenance system and a maintenance method for a cast-in-place box girder of a viaduct, which are used for performing spray maintenance on the cast-in-place box girder, the spray maintenance method does not remove a box girder template before the cast-in-place box girder is hardened, a water supply pipeline and a first spray nozzle are arranged by means of the box girder template so as to perform spray maintenance on the top surface of the cast-in-place box girder, water sprayed to the top surface of the cast-in-place box girder is guided to the surface of the cast-in-place box girder through the box girder template, so that the surface of the cast-in-place box girder is soaked more uniformly and the water evaporation is slower, a wet curtain and a geotextile layer are laid on the top surface of the cast-in-place box girder, the wet curtain and the geotextile layer can lock the water on the top surface of the cast-in-place box girder, the geotextile is covered. The wet curtain passes through the layering with geotechnological cloth layer spacing, can avoid geotechnological cloth layer and wet curtain to be lifted by the wind, leads to moisture loss, can also make geotechnological cloth layer and wet curtain reduce the fold for the cast-in-place case roof beam of laminating more of wet curtain improves and soaks the effect. The spray maintenance system and the maintenance method of the cast-in-situ box girder of the viaduct of the invention are explained below with reference to the accompanying drawings.
Referring to fig. 1, a schematic structural diagram of the spray maintenance system for cast-in-place box girders of viaducts in a use state is shown. Referring to fig. 2, a schematic diagram of a partial enlarged structure at a in fig. 1 is shown. The structure of the spray maintenance system for cast-in-situ box girders for viaducts according to the present invention will be described with reference to fig. 1 and 2.
As shown in fig. 1 and 2, the spray maintenance system for cast-in-place box girders of a viaduct of the present invention is used for spray maintenance of the cast-in-place box girders 20, the cast-in-place box girders 20 are cast in the box girder template 11, the spray maintenance system comprises a fixing frame 31, a water supply pipeline 32, a first spray nozzle 33, a water collection tank 34 and a booster pump 35, wherein the fixing frame 31 is arranged at a side of the box girder template 11 and is close to the top surface of the cast-in-place box girder 20, a plurality of fixing frames 31 are arranged at intervals along the length direction of the cast-in-place box girder 20, and as shown in fig. 3, a direction F2 is the length direction of the cast-in-place box girder 20, and a direction F1 is; the water supply pipeline 32 is laid on the fixing frame 31, and the laying direction of the water supply pipeline 32 is consistent with the length direction of the cast-in-situ box girder 20; a plurality of first spray heads 33 are installed on the water supply pipeline 32, and the water outlets 331 of the first spray heads 33 are arranged towards the top surface of the cast-in-place box girder 20; the water collection tank 34 is arranged close to the cast-in-place tank beam 20, the water collection tank 34 is arranged on the ground, and water is filled in the water collection tank 34; the booster pump 35 is communicated with the water collecting tank 34, the booster pump 35 is communicated with the water supply pipeline 32 through a water conveying pipe 36, water in the water collecting tank 34 is pumped into the water supply pipeline 32 through the booster pump 35, and the water in the water supply pipeline 32 is further sprayed to the top surface of the cast-in-situ box girder 20 from the water outlet 331 of the first spray head 33 so as to realize spray maintenance on the cast-in-situ box girder 20.
Therefore, when the cast-in-place box girder 20 needs water spraying maintenance, the booster pump 35 is started to operate, the booster pump 35 pumps water in the water collecting tank 34 into the water conveying pipe 36, the water flows into the water supply pipeline 32 through the water conveying pipe 36, and then is sprayed to the top surface of the cast-in-place box girder 20 through the water outlet 331 of the first spray nozzle 33, so that the cast-in-place box girder 20 is maintained by spraying water. The water sprayed on the top surface of the cast-in-place box girder 20 is guided by the box girder template 11 to invade the surface of the cast-in-place box girder 20, so that the surface of the cast-in-place box girder 20 is soaked, and the surface of the cast-in-place box girder 20 is soaked more uniformly, the water evaporation is slower, the water retention effect is good, and the maintenance effect of the cast-in-place box girder 20 is improved.
In one embodiment of the present invention, as shown in fig. 1 and 2, the spray maintenance system further includes a wet curtain 37 laid on the top surface of the cast-in-place box girder 20, and the wet curtain 37 covers the top surface of the cast-in-place box girder 20. Utilize wet curtain 37 and cast-in-place box beam 20's top surface to laminate mutually, wet curtain 37 can lock the water that sprays to cast-in-place box beam 20 surface for cast-in-place box beam 20's surface has the water to soak all the time, soaks effectually.
The wet curtain 37 is also called a water curtain, is a honeycomb mechanism produced by processing raw paper, has high water absorption and can realize cooling. The wet curtain 37 is laid on the top surface of the cast-in-place box girder 20, and can cool the cast-in-place box girder 20.
Further, the spraying maintenance system further comprises a geotextile layer 38 covering the wet curtain 37, the geotextile layer 38 covers the wet curtain 37, and the rapid evaporation of the high-altitude air drying effect on moisture is reduced by the geotextile layer 38, so that water locking is realized. The wet curtain 37 and the geotextile layer 38 are paved on the top surface of the cast-in-place box girder 20, so that the effects of locking water and retaining water can be realized, and the effect of wetting the top surface of the cast-in-place box girder 20 is improved.
Still further, as shown in fig. 1 and 2, the spray maintenance system further includes a pressing strip 39 fixed on the top surface of the box girder template 11, a pressing part 391 extending towards the top surface of the cast-in-place box girder 20 is formed on the pressing strip 39, and the pressing part 391 is partially located on the geotextile layer 38. Utilize the spacing geotechnological cloth layer 38 of pressfitting portion 391 of layering 39 and the tip of wet curtain 37, avoid geotechnological cloth layer 38 and wet curtain 37 to be lifted by the wind, lead to moisture to run off, can also reduce geotechnological cloth layer 38 and wet curtain 37 and produce the fold for wet curtain 37 more laminates the top surface of cast-in-place case roof beam 20, improves and soaks the effect.
Preferably, the pressing strip 39 is T-shaped, the pressing strip 39 further includes a vertical portion 392, the vertical portion 392 is vertically connected to the top surface of the box girder template 11, a pressing portion 391 is vertically connected to the vertical portion 392, the pressing portion 391 is horizontally disposed, and an end portion of the pressing portion 391 is partially located above the geotextile layer 38 and the wet curtain 37. The setting direction of the batten 39 is consistent with the length direction of the cast-in-place box girder 20, and the stitching part 391 is in a flat plate shape and is arranged at the end parts of the geotextile layer 38 and the wet curtain 37 in a blocking manner, so that the limiting effect is achieved.
In a preferred embodiment, as shown in fig. 4, a pressing member 42 is installed on the pressing portion 391 of the pressing strip 39, a flexible pad 43 is installed at an end of the pressing member 42, the pressing member 42 is adjustably connected to the pressing portion 391, the flexible pad 43 is tightly attached to the geotextile layer 43 by adjusting the pressing member 42, and the geotextile layer 43 is pressed by the pressing member 42 and the flexible pad 43, so that the structural stability of the geotextile layer 43 is further improved. Preferably, the pressing member 42 is an adjusting bolt, the pressing portion 391 is provided with a threaded hole, the adjusting bolt is screwed into the threaded hole, and the end portion of the adjusting bolt extends out from the bottom of the pressing portion 391, and then is fixedly connected with the flexible pad 43, after the geotextile layer 38 is laid, the adjusting bolt is screwed to press the flexible pad 43 onto the geotextile layer 38, so as to fix the geotextile layer 38. The pressing members 42 and the flexible layers 43 are provided at intervals along the longitudinal direction of the nip 391.
In one embodiment of the present invention, as shown in fig. 1 and 3, the fixing frames 31 are provided at opposite sides of the box girder template 11, and the first spraying heads 33 positioned at opposite sides of the box girder template 11 are disposed to be offset from each other. Thus, the first spray nozzles 33 on both sides of the cast-in-place box girder 20 can uniformly spray the top surface of the cast-in-place box girder 20.
Preferably, as shown in fig. 2, the first nozzle 33 includes a vertical section and an elbow section communicating with the vertical section, the vertical section is communicated with the water supply pipeline 32 and is vertically arranged, the elbow section and the vertical section are arranged at a certain angle of elevation, so that the water outlet 331 of the first nozzle 33 is arranged obliquely upward, and the water mist sprayed from the water outlet 331 can better cover the top surface of the cast-in-place box beam 20.
Specifically, as shown in fig. 1, the box girder template 11 includes a bottom horizontal section, a lateral arc section, and a lateral vertical section, the bottom horizontal section connects the lateral arc section at both ends in the width direction, the lateral arc section is recessed to the inner side of the box girder template 11, the lateral vertical section is connected with the end of the lateral arc section, and the lateral vertical section is vertically disposed. The fixing frame 31 is vertically connected with the lateral vertical section, and the pressing strip 39 is fixedly connected with the top surface of the lateral vertical section.
In an embodiment of the present invention, as shown in fig. 1, an abdomen formwork 12 is further disposed inside the cast-in-place box girder 20, a cavity 121 is formed inside the abdomen formwork 12, and openings are formed at both ends of the cavity 121; the spraying maintenance system also comprises a water supply branch pipe 40 laid in the cavity 121, the laying direction of the water supply branch pipe 40 is consistent with the length direction of the cast-in-place box girder 20, a plurality of second spray heads 41 are arranged on the water supply branch pipe 40, and the water spray ports of the second spray heads 41 face the top of the abdomen formwork 12; the water supply branch pipe 40 is communicated with the water delivery pipe 36, and then the booster pump 35 can supply water into the water supply branch pipe 40 through the water delivery pipe 36, and the water in the water supply branch pipe 40 is further sprayed to the top of the abdomen formwork 12 from the water spray opening of the second spray head 41.
Set up water supply branch pipe 40 and second shower nozzle 41 and spray water to the top of belly template 12, wet the back water and can flow to the lateral wall and the bottom surface of cavity, and then wet the surface of belly template 12, can cool down belly template 12, realize maintaining the chamber surface of cast-in-place box girder 20.
Further, a support is supported at the bottom of the belly mold 12, and the support is spaced apart from the cast-in-place box girder 20 in the longitudinal direction thereof, and supports the water supply branch pipes 40 to support the water supply branch pipes 40 in the cavity 121. The support is arranged to prevent the water supply branch pipe 40 from sticking to the bottom of the abdomen formwork 12, thereby improving the wetting effect.
Preferably, a booster pump 35 is provided outside the water collection tank 34, and the booster pump 35 pumps out water in the water collection tank 34 through a water pipe extended into the water collection tank 24. This increase pump 35 intercommunication raceway 36, four branches are divided to raceway 36, a branch road and the water supply pipe 32 intercommunication of cast-in-place box beam 20 one side, a branch road and the water supply pipe 32 intercommunication of cast-in-place box beam 20 opposite side, a branch road and the water supply branch pipe 40 intercommunication of cast-in-place box beam 20 one side, a branch road and the water supply branch pipe 40 intercommunication of cast-in-place box beam 20 opposite side to realized that a booster pump 35 realizes supplying water for two water supply pipes 32 and two water supply branch pipes 40.
In an embodiment of the present invention, as shown in fig. 1 and 2, the fixing frame 31 includes a horizontally disposed support rod 311 and a slanted bar 312 connected to the support rod 311, and the support rod 311 is fixedly connected to a side portion of the box girder template 11. The support rod 311 is used for supporting the water supply pipeline 32, and the stop rod 312 is arranged to prevent the water supply pipeline 32 from sliding out of the side of the fixing frame 31. To further improve the stability of the water supply line 32, the water supply line 32 and the corresponding fixing frame 31 may be bound together using a binding rope.
Preferably, the support rods 311 and the stop rods 312 are formed as a single piece, such as a steel rod, and the ends of the steel rod are bent to form a fixing frame, and then the steel rod is fixedly connected to the box girder 11.
In another preferred embodiment, when the upper portion of the side portion of the cast-in-place box girder 20 needs to be provided with a reserved steel bar and connected with a structure for subsequent construction, the reserved steel bar extends out from the side portion of the box girder template 11, the reserved steel bar can be used as a fixing frame, the end portion of the reserved steel bar can be bent upwards in an inclined manner to form a stop lever, and the box girder template 11 can be detached after the reserved steel bar is straightened when the template is removed.
In an embodiment of the present invention, the spray maintenance system of the present invention further comprises a settling tank, the settling tank is disposed on the ground and correspondingly disposed at the end of the cast-in-place box girder 20, the top of the settling tank is open for collecting the spray maintenance water flowing out from the end of the cast-in-place box girder 20, the settling tank is provided at the upper portion thereof with a water outlet, the water outlet is communicated with a water guiding pipe, and the other end of the water guiding pipe is communicated with the water collecting tank 34. Therefore, water flowing down from the cast-in-place box beam 20 in the spray maintenance can be collected through the settling tank, and is conveyed to the water collecting tank 34 after being settled, so that the water can be recycled. Preferably, a water pump may be disposed at the water conduit, and the water pump is used to pump out the clear water settled in the settling tank into the water collecting tank 34.
As shown in fig. 1 and 3, when the cast-in-place box girder 20 is constructed in situ, for the sectional construction, it is preferable to use the pier stud as a sectional boundary, that is, each cast-in-place box girder is divided into a part located between two pier studs, a box girder formwork 11 is erected on the two pier studs, an abdomen formwork 12 is arranged in the box girder formwork 11, an inner cavity is formed inside the cast-in-place box girder 20 by using the abdomen formwork 12, and end side formworks are arranged at both ends of the box girder formwork 11, so that a casting space is formed inside, at this time, the cast-in-place box girder 20 of the first section is constructed, so that two end side formworks are arranged, and if the cast-in-place box girder 20 of the subsequent construction, the end side formwork of one side can be omitted, and the end of the cast-in. When the settling tank is provided, the settling tank is provided at both end sides of the box girder template 11, water in the abdomen template 12 flows out from the end opening of the cavity, and water in the box girder template 11 also flows out from the end side. When the non-first section cast-in-place box girder 20 is constructed, a water baffle may be disposed at an end portion of the inner cavity of the previous section cast-in-place box girder 20 to prevent water in the cavity 121 of the belly mold 12 from flowing into the inner cavity of the previous section cast-in-place box girder 20.
The principle of the spray maintenance system of the cast-in-place box girder for the viaduct of the present invention will be explained below.
After cast-in-place case roof beam is under construction, start the booster pump, send into supply channel and water supply branch pipe with the water in the header tank, and then spout through first shower nozzle and second shower nozzle, the top surface of cast-in-place case roof beam is sprayed to first shower nozzle spun water, the top of abdomen template is sprayed to second shower nozzle spun water, the even geotechnological cloth layer and the wet curtain of soaking of water of cast-in-place case roof beam top surface, and then geotechnological cloth layer and wet curtain pin moisture in the top surface of cast-in-place case roof beam, the water that exceeds can be along the internal surface of case roof beam template and the even surface of soaking cast-in-place case roof beam 20, and the water seal evaporation is slow, the effect of water lock is protected is improved. The water at the top of the abdomen formwork flows to the side part and the bottom of the abdomen formwork, so that the surface of the abdomen formwork is completely soaked, the soaking effect is further realized on the surface of the inner cavity of the cast-in-place box girder, and the maintenance effect is improved. And starting the booster pump at certain intervals, spraying for a period of time, then closing the booster pump, and circularly spraying in the way until the cast-in-situ box girder is hardened, thereby finishing the maintenance.
The invention also provides a spray maintenance method of the cast-in-situ box girder of the viaduct, and the maintenance method is explained in comparison below.
The invention relates to a spray maintenance method of a cast-in-place box girder of a viaduct, which comprises the following steps:
as shown in fig. 1 to 3, erecting a box girder formwork 11, and pouring concrete into the box girder formwork 11 to form a cast-in-place box girder 20;
providing a plurality of fixing frames 31, connecting the fixing frames 31 to the side parts of the box girder template 11 and arranging the fixing frames 31 close to the top surface of the cast-in-place box girder 20, and arranging the fixing frames 31 at intervals along the length direction of the cast-in-place box girder 20 when connecting the fixing frames 31;
providing a water supply pipeline 32, and paving the water supply pipeline 32 on the fixing frame 31, wherein the paving direction of the water supply pipeline 32 is consistent with the length direction of the cast-in-situ box girder 20;
providing a plurality of first spray heads 33, installing the first spray heads 33 on the water supply pipeline 32, and arranging the water outlets 331 of the first spray heads 33 towards the top surface of the cast-in-place box girder 20;
providing a header tank 34 with water therein, placing the header tank 34 on the ground and adjacent to the cast-in-place tank beam 20;
providing a booster pump 35, communicating the booster pump 35 with the water collection tank 34, and communicating the booster pump 35 with the water supply pipeline 32 through a water delivery pipe 36;
the booster pump 35 is started, the water in the water collecting tank 34 is pumped to the water supply pipeline 32 through the booster pump 35, and the water in the water supply pipeline 32 is sprayed to the top surface of the cast-in-situ box girder 20 through the water outlet 331 of the first spray head 33 so as to realize the spray maintenance of the cast-in-situ box girder.
In a specific embodiment of the present invention, the spray curing method further includes:
setting spraying time, and closing the booster pump 35 when the running time of the booster pump 35 reaches the spraying time;
the interval time is set, and the booster pump 35 is started according to the interval time to spray the cast-in-place box girder 20.
When the spraying maintenance is carried out, the booster pump is started after a certain time interval, the spraying is closed after a certain time interval, the spraying is carried out in a circulating mode, accumulated water is kept on the top surface of the cast-in-place box girder 20, when the accumulated water amount is small, the booster pump is started, and when the accumulated water amount is large, the booster pump is closed.
In a specific embodiment of the present invention, the spray curing method further includes: and after the cast-in-place box girder is hardened, finishing maintenance, and dismantling the water supply pipeline 32 and the box girder template 11.
In a specific embodiment of the present invention, when the box girder template 11 is erected, the method further includes erecting an abdomen template 12 in the box girder template 11, wherein a cavity 121 is formed inside the abdomen template 12, and openings are formed at two ends of the cavity 121;
providing water supply branch pipes 40, paving the water supply branch pipes 40 in the cavity 121, wherein the paving direction of the water supply branch pipes 40 is consistent with the length direction of the cast-in-situ box girder 20;
providing a plurality of second spray heads 41, installing the second spray heads 41 on the water supply branch pipes 40, and arranging the water spray ports of the second spray heads 41 towards the top of the abdomen formwork 12;
the water supply branch pipe 40 is connected to the water pipe 36, and the water is pumped into the water supply branch pipe 40 by the booster pump 35, and the water in the water supply branch pipe 40 is further sprayed from the water spray opening of the second spray head 41 to the top of the abdomen formwork 12.
In a specific embodiment of the present invention, the spray curing method further includes:
providing a settling tank with an opening at the top, placing the settling tank on the ground and corresponding to the position of the end part of the cast-in-place box beam, and collecting water for spray maintenance flowing out of the end part of the cast-in-place box beam through the settling tank;
a water outlet is arranged at the upper part of the settling tank;
a water guide pipe is communicated with the water outlet, and the other end of the water guide pipe is communicated with the water collecting tank.
While the present invention has been described in detail and with reference to the embodiments thereof as illustrated in the accompanying drawings, it will be apparent to one skilled in the art that various changes and modifications can be made therein. Therefore, certain details of the embodiments are not to be interpreted as limiting, and the scope of the invention is to be determined by the appended claims.
Claims (10)
1. The utility model provides a cast-in-place box girder's of viaduct maintenance system that sprays, cast-in-place box girder pour and be formed at the box girder template in, its characterized in that, it includes to spray maintenance system:
the fixing frames are arranged on the side parts of the box girder template and close to the top surface of the cast-in-place box girder, and are arranged at intervals along the length direction of the cast-in-place box girder;
the water supply pipeline is laid on the fixing frame, and the laying direction of the water supply pipeline is consistent with the length direction of the cast-in-place box girder;
the water outlets of the first spray heads face the top surface of the cast-in-place box girder;
the water collecting tank is arranged close to the cast-in-place tank beam, the water collecting tank is arranged on the ground, and water is filled in the water collecting tank; and
and the booster pump is communicated with the water supply pipeline through a water pipe, the booster pump pumps water in the water collecting tank to the water supply pipeline, and water in the water supply pipeline is sprayed to the top surface of the cast-in-situ box girder from a water outlet of the first spray head so as to realize the spray maintenance of the cast-in-situ box girder.
2. The spray maintenance system of a cast-in-place box girder for a viaduct of claim 1, further comprising a wet curtain laid on the top surface of the cast-in-place box girder, wherein the wet curtain covers the top surface of the cast-in-place box girder.
3. The spray maintenance system of a cast-in-place box girder for an elevated bridge of claim 2, further comprising a geotextile layer covering the wet curtain.
4. The spray maintenance system for cast-in-place box girders for viaducts of claim 3, further comprising a bead fixed on the top surface of the box girder formwork, wherein the bead is formed with a pressing part extending toward the top surface of the cast-in-place box girder, and the pressing part is located on the geotextile layer.
5. The spray maintenance system of the cast-in-place box girder for the viaduct bridge of claim 1, wherein an abdomen formwork is further provided inside the cast-in-place box girder, a cavity is formed inside the abdomen formwork, and openings are formed at both ends of the cavity;
the spraying maintenance system also comprises water supply branch pipes paved in the cavity, the paving direction of the water supply branch pipes is consistent with the length direction of the cast-in-place box girder, a plurality of second spray heads are arranged on the water supply branch pipes, and water spray ports of the second spray heads face to the top of the abdomen formwork;
the water supply branch pipe is communicated with the water delivery pipe, so that the booster pump can supply water into the water supply branch pipe through the water delivery pipe, and the water in the water supply branch pipe is sprayed to the top of the abdomen template from the water spray opening of the second spray head.
6. A spraying maintenance method for a cast-in-place box girder of an elevated bridge is characterized by comprising the following steps:
erecting a box girder template, and pouring concrete into the box girder template to form a cast-in-place box girder;
providing a plurality of fixing frames, connecting the fixing frames to the side parts of the box girder template and arranging the fixing frames close to the top surface of the cast-in-place box girder, and arranging the fixing frames at intervals along the length direction of the cast-in-place box girder when the fixing frames are connected;
providing a water supply pipeline, and paving the water supply pipeline on the fixing frame, wherein the paving direction of the water supply pipeline is consistent with the length direction of the cast-in-place box girder;
providing a plurality of first spray heads, installing the first spray heads on the water supply pipeline, and arranging the water outlets of the first spray heads towards the top surface of the cast-in-place box beam;
providing a water collecting tank filled with water, and placing the water collecting tank on the ground and close to the cast-in-place tank beam;
providing a booster pump, communicating the booster pump with the water collecting tank, and communicating the booster pump with the water supply pipeline through a water delivery pipe; and
the booster pump is started, water in the water collecting tank is pumped to the water supply pipeline through the booster pump, and water in the water supply pipeline is sprayed to the top surface of the cast-in-place box girder through the water outlet of the first spray head so as to realize the spray maintenance of the cast-in-place box girder.
7. The spray maintenance method of claim 6, further comprising:
setting spraying time, and closing the booster pump when the running time of the booster pump reaches the spraying time;
setting interval time, and starting the booster pump according to the interval time to spray the cast-in-place box girder.
8. The spray maintenance method of claim 6, further comprising: and after the cast-in-place box girder is hardened, finishing maintenance and dismantling the water supply pipeline and the box girder template.
9. The spray maintenance method of claim 6, further comprising supporting an abdomen formwork in the box girder formwork while supporting the box girder formwork, wherein a cavity is formed inside the abdomen formwork, and openings are formed at both ends of the cavity;
providing water supply branch pipes, and paving the water supply branch pipes in the cavity, wherein the paving direction of the water supply branch pipes is consistent with the length direction of the cast-in-place box girder;
providing a plurality of second spray heads, installing the second spray heads on the water supply branch pipes, wherein water spray ports of the second spray heads are arranged towards the top of the abdomen formwork;
and the water supply branch pipe is communicated with the water delivery pipe, so that water is pumped into the water supply branch pipe through the booster pump, and the water in the water supply branch pipe is sprayed to the top of the abdomen template from the water spray opening of the second spray head.
10. The spray maintenance method of claim 6, further comprising:
providing a settling tank with a top opening, placing the settling tank on the ground and corresponding to the position of the end part of the cast-in-place box girder, and collecting water for spray maintenance flowing out of the end part of the cast-in-place box girder through the settling tank;
a water outlet is arranged at the upper part of the settling tank;
and the water outlet is communicated with a water guide pipe, and the other end of the water guide pipe is communicated with the water collecting tank.
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| CN202010608411.4A CN111676829A (en) | 2020-06-29 | 2020-06-29 | Spraying maintenance system and method for cast-in-place box girder of viaduct bridge |
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| CN202010608411.4A CN111676829A (en) | 2020-06-29 | 2020-06-29 | Spraying maintenance system and method for cast-in-place box girder of viaduct bridge |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112813835A (en) * | 2020-12-31 | 2021-05-18 | 山东鲁桥建设有限公司 | Spraying maintenance system and method for overhead cast-in-place box girder |
| CN114102824A (en) * | 2021-11-17 | 2022-03-01 | 中铁一局集团有限公司 | Novel prefabricated case roof beam intelligence sprays health preserving system |
| CN114183201A (en) * | 2021-12-07 | 2022-03-15 | 山东科技大学 | Mine is combined and is adopted working face dust monitoring devices and intelligent spraying dust fall system |
| CN115233572A (en) * | 2022-08-12 | 2022-10-25 | 无锡交通建设工程集团有限公司 | Water tank structure applied to rhombic hanging basket construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112813835A (en) * | 2020-12-31 | 2021-05-18 | 山东鲁桥建设有限公司 | Spraying maintenance system and method for overhead cast-in-place box girder |
| CN114102824A (en) * | 2021-11-17 | 2022-03-01 | 中铁一局集团有限公司 | Novel prefabricated case roof beam intelligence sprays health preserving system |
| CN114183201A (en) * | 2021-12-07 | 2022-03-15 | 山东科技大学 | Mine is combined and is adopted working face dust monitoring devices and intelligent spraying dust fall system |
| CN114183201B (en) * | 2021-12-07 | 2024-05-03 | 山东科技大学 | Flour dust monitoring and intelligent spraying dust fall system for fully-mechanized mining work of mine |
| CN115233572A (en) * | 2022-08-12 | 2022-10-25 | 无锡交通建设工程集团有限公司 | Water tank structure applied to rhombic hanging basket construction method |
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