CN113001753A - Intelligent box girder prefabricating method - Google Patents
Intelligent box girder prefabricating method Download PDFInfo
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- CN113001753A CN113001753A CN202110261124.5A CN202110261124A CN113001753A CN 113001753 A CN113001753 A CN 113001753A CN 202110261124 A CN202110261124 A CN 202110261124A CN 113001753 A CN113001753 A CN 113001753A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
- B28B23/04—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F27/00—Making wire network, i.e. wire nets
- B21F27/12—Making special types or portions of network by methods or means specially adapted therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/245—Curing concrete articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
- B28B23/04—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed
- B28B23/043—Wire anchoring or tensioning means for the reinforcements
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- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses an intelligent box girder prefabricating method, which comprises the following steps: planning a precast beam field; secondly, binding a prefabricated box girder reinforcement cage; thirdly, casting the prefabricated box girder in situ; fourthly, maintaining the prefabricated box girder; and fifthly, tensioning and sealing the anchor of the pre-stressed steel strand of the precast box girder. The construction process is simple, the intelligent levels of spray curing and steam curing are improved, the convenience of transportation and hoisting of the precast beam and construction materials on a precast yard is improved, the binding quality and binding efficiency of the precast box beam reinforcement cage are improved, and the anchor sealing effect of the precast box beam prestressed steel strands is improved.
Description
Technical Field
The invention belongs to the technical field of prefabricated part construction, and particularly relates to an intelligent box girder prefabricating method.
Background
With the continuous development of social economy, the construction of highway engineering is also rapidly developed. The superstructure of highway bridge engineering adopts precast beam more, and whether the construction of precast beam is up to standard is directly influenced to the good or bad of precast beam construction. As a factory and intensive production technology, the prefabricated box girder has a continuously optimized construction process. As an important component of precast beam construction, a precast beam field bears a precast beam construction task of a whole engineering project, which is the important part of engineering construction, not only restricts the project construction period, but also concerns the overall construction quality of all highway bridge projects, so the planning and construction of the precast beam field should be carefully organized and arranged at the initial stage of the engineering project. The problems of low automation degree, low prefabricating efficiency, multiple operation vertical intersections, high safety risk and the like exist in the planning of a precast beam yard, the arrangement of precast pedestals, the arrangement of maintenance devices, the configuration of templates, the arrangement of gantry cranes and the like in the traditional process, so that the intelligent box girder prefabricating method with high prefabricating efficiency and high safety is provided.
Disclosure of Invention
The invention aims to solve the technical problem that the defects in the prior art are overcome, and the intelligent box girder prefabricating method is simple in construction process, improves the intelligent levels of spray curing and steam curing, improves the convenience in transportation and hoisting of precast girders and construction materials on a prefabrication site, improves the binding quality and binding efficiency of precast box girder steel reinforcement cages, and improves the anchor sealing effect of precast box girder prestressed steel strands.
In order to solve the technical problems, the invention adopts the technical scheme that: an intelligent box girder prefabricating method is characterized by comprising the following steps:
step one, planning a precast beam field:
the prefabricated beam yard comprises a reinforcing steel bar processing area, a prefabricated area and a storage area which are sequentially arranged from a bridge position area to a position area close to the bridge position area along the bridge construction direction, and a main lane which is arranged between the prefabricated area and the storage area in a penetrating mode along the bridge construction direction, wherein a power cable, a spray water conveying pipeline and a steam conveying pipeline are pre-buried in the underground of the prefabricated area, the pre-buried depth of the steam conveying pipeline is equal to the pre-buried depth of the spray water conveying pipeline, the pre-buried depth of the power cable is smaller than the pre-buried depth of the steam conveying pipeline, at least two prefabricated production lines which are arranged in parallel along the bridge construction direction are arranged in the prefabricated area, each prefabricated production line comprises a plurality of prefabricated pedestals arranged in an array mode, distribution boxes connected with the power cable are pre-buried at two ends of each prefabricated pedestal, and a plurality of spray pipe installation holes which are arranged at intervals along the length direction of, the prefabricated pedestal is provided with a plurality of steam-curing pipe mounting holes which are arranged at intervals along the length direction of the prefabricated pedestal, the spray pipe mounting holes and the steam-curing pipe mounting holes are T-shaped mounting holes, each T-shaped mounting hole comprises a vertical hole section and a horizontal hole section which is communicated with the top end of the vertical hole section and is communicated with the width direction of the prefabricated pedestal, T-shaped spray pipes communicated with the spray water conveying pipeline are mounted in the spray pipe mounting holes, T-shaped steam-curing pipes communicated with the steam conveying pipeline are mounted in the steam-curing pipe mounting holes, spray heads are mounted at two ends of the horizontal pipe of each T-shaped spray pipe, the spray directions of the spray heads face two sides of the prefabricated beam, a first electromagnetic valve is mounted on each vertical pipe of the T-shaped spray pipes, and a second electromagnetic valve is mounted on each vertical pipe of the T-shaped steam-curing pipe, the first electromagnetic valves and the second electromagnetic valves are controlled by a controller;
step two, binding the prefabricated box girder reinforcement cage, and specifically comprising the following steps:
step 201, binding of a bottom web reinforcement cage:
a plurality of steel bar binding pedestals are distributed in the steel bar processing area, bottom web steel bar positioning jig frames for binding bottom web steel bar cages are arranged on the steel bar binding pedestals, and the bottom web steel bar cages are bound on the bottom web steel bar positioning jig frames;
step 202, tensioning the longitudinal reinforcing steel bars of the web plate, wherein the specific process comprises the following steps:
2021, mounting positioning frames at two ends of the bottom web plate steel bar positioning jig frame, wherein each positioning frame comprises a support fixedly connected to the end of the bottom web plate steel bar positioning jig frame and a positioning plate vertically mounted on the support, and a group of web plate longitudinal steel bar penetrating holes are formed in the positioning plate;
2022, installing a penetrating hydraulic jack at the end of any one of the web longitudinal steel bars, enabling the end face of the penetrating hydraulic jack to tightly abut against the side face of the positioning plate, driving the penetrating hydraulic jack to strain the web longitudinal steel bars by a hydraulic pump station, and then locking the end of any one of the web longitudinal steel bars by a clip anchor;
step 203, binding a top plate reinforcement cage, wherein the specific process comprises the following steps:
step 2031, installing a sliding platform device on the top plate steel reinforcement cage positioning jig frame:
the sliding platform device comprises a platform, stand columns and traveling wheels, wherein the platform stretches across the upper part of a top plate steel reinforcement cage positioning jig frame, the stand columns are installed at two ends of the platform, the traveling wheels are installed at the bottom ends of the stand columns, and two linear rails which are parallel to each other and matched with the traveling wheels are arranged on the top plate steel reinforcement cage positioning jig frame;
step 2032, binding a plurality of top plate transverse stirrups and a plurality of top plate longitudinal reinforcements of the top plate reinforcement cage on the top plate reinforcement cage positioning jig, and then standing on a platform by constructors to bind the top plate portal reinforcements;
step three, casting the prefabricated box girder in situ;
closing the hydraulic template device to form a concrete pouring cavity in the hydraulic template device, and sequentially hoisting the bottom web reinforcement cage and the top plate reinforcement cage which are bound in the second step into the concrete pouring cavity by using a gantry crane; then, pouring concrete into the concrete pouring cavity, and forming a prefabricated box girder;
step four, maintaining the prefabricated box girder:
when the value range of the lowest temperature of the environmental temperature is 10-32 ℃, the controller controls the plurality of first electromagnetic valves to be opened simultaneously, spray water enters the plurality of T-shaped spray pipes through the spray water conveying pipeline and is sprayed on the side surface of the prefabricated box girder through the plurality of spray heads, and the prefabricated box girder is subjected to spray maintenance;
when the lowest temperature of the environment temperature is lower than 5 ℃, erecting a protection shed on the periphery of the prefabricated pedestal, controlling a plurality of second electromagnetic valves to be opened simultaneously by a controller, allowing steam to enter a plurality of T-shaped steam curing pipes through the steam conveying pipeline, forming a steam layer in the protection shed, and performing steam curing on the prefabricated box girder;
step five, tensioning and sealing the anchor of the pre-stressed steel strand of the precast box girder, and the concrete process comprises the following steps:
step 501, tensioning the prestressed steel strand by using intelligent tensioning equipment;
502, performing primary anchor sealing on the end part of the prestressed steel strand by using an anchor sealing material to enable the end part of the prestressed steel strand to extend out of a first anchor sealing surface;
step 503, circularly grouting into the prestressed duct by using a circular grouting device;
and step 504, performing secondary anchor sealing on the end part of the prestressed steel strand by using an anchor sealing material to enable a second anchor sealing surface to be flush with the end surface of the corrugated pipe.
The intelligent box girder prefabricating method is characterized by comprising the following steps: in step 201, when web steel reinforcement cage at the bottom of the ligature, utilize to wear the muscle device and carry out wearing to establish of longitudinal reinforcement, wear the muscle device including being used for the suit at the direction steel pipe of longitudinal reinforcement tip, the one end of direction steel pipe is provided with the cone, the shaft type closing cap of step is installed to the other end of direction steel pipe, it passes the hole to have seted up longitudinal reinforcement on the shaft type closing cap of step, the axis that longitudinal reinforcement passed the hole with the axis of direction steel pipe coincides mutually.
The intelligent box girder prefabricating method is characterized by comprising the following steps: spray water pipeline includes spray water trunk line and a plurality of all with the spray water branch pipeline that the spray water trunk line is linked together, spray water trunk line is linked together with water supply pipe, spray water branch pipeline is pre-buried a plurality of on being located same straight line under the prefabricated pedestal, the bottom of the vertical pipe of T style of calligraphy shower with spray water branch pipeline is linked together.
Foretell intelligent precast beam field, its characterized in that: steam conveying pipeline include steam trunk line and a plurality of all with the steam branch pipeline that steam trunk line is linked together, steam trunk line is linked together with heat supply pipeline, steam branch pipeline is pre-buried in a plurality of that is located same straight line under the prefabricated pedestal, the T style of calligraphy evaporate the bottom of the vertical pipe of curing the pipe with steam branch pipeline is linked together.
The intelligent box girder prefabricating method is characterized by comprising the following steps: the value range of the horizontal distance between the spray water branch pipeline and the steam branch pipeline which are positioned right below the plurality of prefabricated pedestals on the same straight line is 40-50 cm.
The intelligent box girder prefabricating method is characterized by comprising the following steps: a plurality of reinforcement pedestal equipartition is established prefabricated district is close to one side in reinforcement processing district, be provided with the storehouse district between prefabricated district and the storage area, one side that the storehouse district is close to the road bed.
The intelligent box girder prefabricating method is characterized by comprising the following steps: the value range of the embedded depth of the steam conveying pipeline and the value range of the embedded depth of the spray water conveying pipeline are both 80 cm-90 cm.
The intelligent box girder prefabricating method is characterized by comprising the following steps: in step 502, the distance between the end of the prestressed steel strand and the first anchor sealing surface ranges from 10mm to 20 mm.
The intelligent box girder prefabricating method is characterized by comprising the following steps: in step 503, the circulating grouting device includes a grouting circulating pipeline for connecting two pre-stressed ducts in series, a slurry mixing drum and a mortar pump communicated with the grouting circulating pipeline, and a grout stop valve is installed on the grouting circulating pipeline; the process of circularly grouting into the prestressed duct by utilizing the circular grouting device comprises the following steps: opening a grout stop valve, starting a mortar pump and a grout mixing drum, and grouting into the prestressed duct to discharge gas in the prestressed duct along the steel strand; then, closing the grout stopping valve, and dismantling the grouting circulating pipeline; and finally, after the slurry in the prestressed duct is solidified, removing the slurry stop valve.
The intelligent box girder prefabricating method is characterized by comprising the following steps: in step 503, the value range of the pressure of the circulating grouting is 0.5MPa to 0.7MPa, and the pressure duration of the circulating grouting is 3min to 5 min.
Compared with the prior art, the invention has the following advantages:
1. the spray water conveying pipeline and the steam conveying pipeline are pre-buried under the prefabrication area, the prefabrication area is provided with a plurality of prefabrication pedestals, the periphery of each prefabrication pedestal is provided with the hydraulic template device, when the prefabrication of the precast beam is carried out on the prefabrication pedestal by using the hydraulic template device, the spray maintenance and the steam maintenance of the poured precast beam are needed, if the spray water pipeline for the spray maintenance and the steam conveying pipeline for the steam maintenance are arranged on the periphery of the prefabrication pedestal, the phenomenon that the hydraulic template device, the spray water pipeline and the steam conveying pipeline are mutually interfered can occur, the structure of the spray water pipeline and the structure of the steam conveying pipeline are very complicated, and when the spray water conveying pipeline and the steam conveying pipeline are pre-buried under the prefabrication area, the mutual influence among the hydraulic template device, the spray water pipeline and the steam conveying pipeline can be avoided, and can simplify spray water piping's structure and steam pipeline's structure, simultaneously, can improve precast beam field and construction material's transportation and the convenience of hoist and mount, can improve clean and tidy nature and the aesthetic property in whole precast beam field.
2. When the bottom web plate reinforcement cage is bound, the end part of the longitudinal reinforcement of the bottom plate can be prevented from colliding with the transverse stirrup of the bottom plate or the end part of the longitudinal reinforcement of the web plate can be prevented from colliding with the transverse stirrup of the web plate by using the reinforcement penetrating device, so that the longitudinal reinforcement of the bottom plate or the longitudinal reinforcement 28 of the web plate can be ensured to continuously penetrate, and the binding efficiency of the bottom web plate reinforcement cage of the prefabricated box girder can be improved; after the binding of bottom web plate reinforcement cage is completed, the longitudinal web plate reinforcement is tensioned, and the longitudinal web plate reinforcement is tensioned, so that the straightness of the longitudinal web plate reinforcement can be improved, the accuracy of vertical intervals among a plurality of longitudinal web plate reinforcements can be improved, and meanwhile, the forming quality of the prefabricated box girder can be improved.
3. According to the invention, the sliding platform device is arranged on the top plate steel reinforcement cage positioning jig frame, after the top plate transverse stirrups and the top plate longitudinal steel reinforcements of a plurality of top plate steel reinforcement cages are bound on the top plate steel reinforcement cage positioning jig frame, a constructor stands on the platform to bind the top plate door-shaped steel reinforcements, so that the top plate transverse stirrups and the top plate longitudinal steel reinforcements can be prevented from being stepped and deformed, the position precision of the top plate door-shaped steel reinforcements can be improved, and meanwhile, the binding efficiency of the top plate steel reinforcement cages can be improved.
4. According to the invention, the anchor sealing process of the prestressed steel strand of the prefabricated box girder is divided into the first anchor sealing and the second anchor sealing, so that the phenomenon of incompact grouting in the prestressed duct can be solved, the gas in the prestressed duct can be conveniently and completely discharged in the circulating grouting process, even the residual gas in the prestressed steel strand can be discharged, and the anchor sealing effect of the prestressed steel strand of the prefabricated box girder is greatly improved.
5. The invention has simple construction flow, reasonable design, low construction cost and convenient popularization and application.
In conclusion, the construction process is simple, the intelligent levels of spray curing and steam curing are improved, the convenience of transportation and hoisting of the precast beam and construction materials on a precast yard is improved, the binding quality and binding efficiency of the precast box beam reinforcement cage are improved, and the anchor sealing effect of the precast box beam prestress steel strands is improved.
The invention is described in further detail below with reference to the figures and examples.
Drawings
FIG. 1 is a flow chart of the prefabrication process of the invention.
FIG. 2 is a layout of a precast beam field of the present invention.
FIG. 3 is a schematic view of the vertical structure of a single pre-fabricated platform and a spray water delivery pipe according to the present invention.
FIG. 4 is a schematic elevational view of a single pre-fabricated platform and vapor delivery conduit according to the present invention.
FIG. 5 is a schematic view showing the positional relationship between a plurality of pre-fabricated stages and shower water supply lines according to the present invention.
FIG. 6 is a schematic view of the position relationship of a plurality of pre-fabricated platforms and vapor delivery conduits of the present invention.
FIG. 7 is a schematic diagram showing the positional relationship among a gantry crane, a prefabricated pedestal, a hydraulic template device and a prefabricated box girder according to the present invention.
Fig. 8 is a schematic view of the use state of the tendon-threading device of the present invention.
Fig. 9 is a schematic structural diagram of the positioning frame of the present invention.
Fig. 10 is a schematic view showing the use state of the longitudinal reinforcing steel bar of the tension web of the present invention.
Fig. 11 is a schematic view of the installation relationship between the top plate reinforcement cage positioning jig and the sliding platform device.
Description of reference numerals:
Detailed Description
An intelligent box girder prefabricating method as shown in fig. 1, 2, 3 and 4 includes the following steps:
step one, planning a precast beam field:
the precast beam yard comprises a reinforcement processing area 2, a precast area 1 and a storage area 4 which are sequentially arranged from a bridge position area to a main lane 3 which is close to the bridge position area and along the bridge bridging direction, the main lane 3 is arranged between the precast area 1 and the storage area 4 in a penetrating way along the bridge bridging direction, an electric power cable, a spray water conveying pipeline and a steam conveying pipeline are pre-buried in the underground of the precast area 1, the pre-buried depth of the steam conveying pipeline is equal to the pre-buried depth of the spray water conveying pipeline, the pre-buried depth of the electric power cable is smaller than the pre-buried depth of the steam conveying pipeline, the precast area 1 is provided with at least two precast production lines which are arranged in parallel along the bridge bridging direction, each precast production line comprises a plurality of precast pedestals 6 which are arranged in an array mode, distribution boxes 10 connected with the electric power cable are pre-buried in the two ends of the precast pedestals 6, a plurality of spray pipe installation holes 6-1 which are arranged in an interval A plurality of steam-curing pipe mounting holes 6-2 which are arranged at intervals along the length direction of the prefabricated pedestal 6 are reserved on the prefabricated pedestal 6, the spray pipe mounting holes 6-1 and the steam-curing pipe mounting holes 6-2 are T-shaped mounting holes, each T-shaped mounting hole comprises a vertical hole section and a horizontal hole section which is communicated with the top end of the vertical hole section and is communicated with the width direction of the prefabricated pedestal 6, T-shaped spray pipes 17 communicated with the spray water conveying pipeline are mounted in the spray pipe mounting holes 6-1, T-shaped steam-curing pipes 18 communicated with the steam conveying pipeline are mounted in the steam-curing pipe mounting holes 6-2, spray heads are mounted at two ends of the horizontal pipes of the T-shaped spray pipes 17, the spraying directions of the spray heads face two side surfaces of the prefabricated beam, and first electromagnetic valves 31 are mounted on the vertical pipes of each T-shaped spray pipe 17, a second electromagnetic valve 32 is mounted on a vertical pipe of each T-shaped steam-curing pipe 18, and the plurality of first electromagnetic valves 31 and the plurality of second electromagnetic valves 32 are controlled by a controller;
in this embodiment, as shown in fig. 2, on the premise of protecting an existing building, a precast beam yard is planned in a rectangular area in a strip shape between a roadbed 14, the existing building 15 and a plurality of ramps 16 by combining factors such as characteristics of engineering projects, external environment influence factors, the number of projects, a planning period, and the like, and a direction indicated by an arrow in fig. 1 is a bridging direction, so that not only is the land occupation reduced as much as possible, but also the difficulty and distance of precast beam transportation can be reduced, and the project operation risk can be reduced.
As shown in fig. 3 and 4, in this embodiment, by embedding the spray water transportation pipeline and the steam transportation pipeline in the underground of the prefabrication area 1, since the prefabrication area 1 is provided with a plurality of prefabrication pedestals 6, the periphery of the prefabrication pedestals 6 is provided with the hydraulic formwork device, when prefabrication of the precast beam is performed on the prefabrication pedestals 6 by the hydraulic formwork device, spray maintenance and steam maintenance of the precast beam to be poured are required, if the spray water pipeline for spray maintenance and the steam transportation pipeline for steam maintenance are both arranged on the periphery of the prefabrication pedestals 6, a phenomenon that the hydraulic formwork device, the spray water pipeline and the steam transportation pipeline interfere with each other occurs, which may cause the structure of the spray water pipeline and the structure of the steam transportation pipeline to be very complicated, and when the spray water transportation pipeline and the steam transportation pipeline are both embedded in the underground of the prefabrication area 1, not only the hydraulic formwork device can be avoided, The mutual influence between water spray pipeline and the steam conveying pipeline can be simplified, the structure of the water spray pipeline and the structure of the steam conveying pipeline can be simplified, meanwhile, the convenience in transporting and hoisting the precast beam and the construction materials on the precast beam field can be improved, and the tidiness and attractiveness of the whole precast beam field can be improved.
In this embodiment, when steam pipeline's pre-buried degree of depth is equal to spray water pipeline's pre-buried degree of depth, spray water pipeline's pre-buried and steam pipeline's pre-buried can be under construction simultaneously, can shorten the construction period in precast beam field, can effectively utilize underground space, realize steam pipeline and spray water pipeline's pre-buried.
In this embodiment, through the pre-buried electric power cable in the underground of prefabricated district 1, and through the both ends at prefabricated pedestal 6 pre-buried with the block terminal 10 that the electric power cable is connected, when the prefabrication of precast beam is carried out to the hydraulic pressure template device on prefabricated pedestal 6, pre-buried block terminal 10 can improve the convenience of power consumption when prefabricated beam is prefabricated, simultaneously, can avoid the electric power cable to cause adverse effect to the transportation and the hoist and mount of precast beam and construction material on the precast beam scene, can improve the security of electric power cable.
In this embodiment, when pre-buried power cable, only need satisfy the hiding to power cable can, and when pre-buried shower water pipeline and steam transmission pipeline, not only need satisfy the hiding to shower water pipeline and steam transmission pipeline, still need satisfy shower water pipeline and steam transmission pipeline's frostproofing requirement, consequently, power cable's pre-buried degree of depth is less than steam transmission pipeline's pre-buried degree of depth.
In the embodiment, a plurality of spray pipe mounting holes 6-1 are reserved on the prefabrication pedestal 6 and are arranged at intervals along the length direction of the prefabrication pedestal 6, the spray pipe mounting holes 6-1 are T-shaped mounting holes, T-shaped spray pipes 17 communicated with the spray water conveying pipeline are arranged in the spray pipe mounting holes 6-1, spray heads are arranged at two ends of horizontal pipes of the T-shaped spray pipes 17, the spraying directions of the spray heads face to two side surfaces of the prefabrication beam, when the prefabricated beam is in practical use, spray water can be conveyed into the T-shaped spray pipes 17 through the underground spray water conveying pipeline and is sprayed on the two side surfaces of the prefabrication beam through the spray heads, a first electromagnetic valve 31 is arranged on a vertical pipe of each T-shaped spray pipe 17, and the first electromagnetic valves 31 are controlled by a controller, through the intelligent control of controller promptly, can realize the automatic control to the pressure and the flow of shower water to realize the automatic control to spraying the maintenance, can improve the intelligent level in precast beam field, can reduce constructor's intensity of labour, excellent in use effect.
In this embodiment, a plurality of steam-curing pipe installation holes 6-2 are reserved on the prefabricated pedestal 6 and are arranged at intervals along the length direction of the prefabricated pedestal 6, the steam-curing pipe installation holes 6-2 are T-shaped installation holes, the steam-curing pipes 18 communicated with the steam delivery pipes are installed in the steam-curing pipe installation holes 6-2, when in practical use, steam can be delivered into the T-shaped steam-curing pipes 18 through the steam delivery pipes embedded underground, the horizontal pipes of the T-shaped steam-curing pipes 18 are in a state of being opened at two ends, when steam curing is required to be performed on a poured prefabricated beam, firstly, a protective shed needs to be erected on the periphery of the prefabricated pedestal 6, steam sprayed from the T-shaped steam-curing pipes 18 forms a steam-curing layer in the closed protective shed, and because the vertical pipes of each T-shaped steam-curing pipe 18 are provided with the second electromagnetic valves 32, and the plurality of second solenoid valves 32 are controlled by the controller, namely, the pressure and the flow of the steam can be automatically controlled through the intelligent control of the controller, so that the steam curing can be automatically controlled, the intelligent level of the precast beam field can be improved, and the popularization and the application are convenient.
Step two, binding the prefabricated box girder reinforcement cage, and specifically comprising the following steps:
step 201, binding of a bottom web reinforcement cage:
as shown in fig. 2, a plurality of reinforcement binding pedestals 12 are distributed in the reinforcement processing area 2, bottom web reinforcement positioning jig frames for binding bottom web reinforcement cages are arranged on the reinforcement binding pedestals 12, and the bottom web reinforcement cages are bound on the bottom web reinforcement positioning jig frames;
step 202, tensioning the longitudinal reinforcing steel bars of the web plate, wherein the specific process comprises the following steps:
as shown in fig. 9 and 10, step 2021, installing positioning frames at two ends of the bottom web reinforcement bar positioning jig, where the positioning frames include a support 23-1 for being fixedly connected to an end of the bottom web reinforcement bar positioning jig and a positioning plate 23-2 vertically installed on the support 23-1, and a set of web longitudinal reinforcement bar through holes 23-2-1 is opened on the positioning plate 23-2;
step 2022, installing a feed-through hydraulic jack 24 at the end of any one of the web longitudinal steel bars 28, so that the end surface of the feed-through hydraulic jack 24 is tightly abutted against the side surface of the positioning plate 23-2, driving the feed-through hydraulic jack 24 by a hydraulic pump station 25 to strain the web longitudinal steel bar 28, and then locking the end of any one of the web longitudinal steel bars 28 by using a clip anchor;
in this embodiment, after the ligature of bottom web reinforcing bar cage is accomplished, take-up the longitudinal reinforcement 28 of web, through carrying out stretch-draw to the longitudinal reinforcement 28 of web, can improve the straightness in same direction as of the longitudinal reinforcement 28 of web, can improve the accuracy of perpendicular interval between a plurality of longitudinal reinforcements 28 of web, simultaneously, can improve the shaping quality of prefabricated box girder.
Step 203, binding a top plate reinforcement cage, wherein the specific process comprises the following steps:
step 2031, installing a sliding platform device on the top plate steel reinforcement cage positioning jig frame 26:
as shown in fig. 11, the sliding platform device comprises a platform 27-1 spanning above the top plate steel reinforcement cage positioning jig 26, upright posts 27-2 installed at two ends of the platform 27-1, and road wheels 27-3 installed at bottom ends of the upright posts 27-2, wherein two parallel linear rails 27-4 matched with the road wheels 27-3 are arranged on the top plate steel reinforcement cage positioning jig 26;
step 2032, binding a plurality of top plate transverse stirrups and a plurality of top plate longitudinal reinforcements of the top plate reinforcement cage on the top plate reinforcement cage positioning jig 26, and then standing on the platform 27-1 by constructors to bind the top plate portal reinforcements;
in this embodiment, through installing the platform device that slides on roof steel reinforcement cage location bed-jig 26, during actual construction, earlier at roof steel reinforcement cage location bed-jig 26 go up a plurality of horizontal stirrups of roof and a plurality of roof longitudinal reinforcement of ligature, later, constructor stands and carries out the ligature of roof door type reinforcing bar on platform 27-1, can avoid the horizontal stirrups of roof and roof longitudinal reinforcement to be stepped on the deformation, can improve the position precision of roof door type reinforcing bar, and simultaneously, can improve the ligature efficiency of roof steel reinforcement cage.
Step three, casting the prefabricated box girder in situ;
as shown in fig. 7, closing the hydraulic template device 29 to form a concrete pouring cavity in the hydraulic template device 29, and sequentially hoisting the bottom web reinforcement cage and the top plate reinforcement cage bound in the second step into the concrete pouring cavity by using the gantry crane 21; then, pouring concrete into the concrete pouring cavity, and forming a prefabricated box girder;
step four, maintaining the prefabricated box girder:
when the value range of the lowest temperature of the environmental temperature is 10-32 ℃, the controller controls the plurality of first electromagnetic valves 31 to be opened simultaneously, spray water enters the plurality of T-shaped spray pipes 17 through the spray water conveying pipeline and is sprayed on the side surface of the prefabricated box girder through the plurality of spray heads, and the prefabricated box girder is subjected to spray maintenance;
when the lowest temperature of the environment temperature is lower than 5 ℃, erecting a protective shed on the periphery of the prefabricating pedestal 6, controlling a plurality of second electromagnetic valves 32 to be opened simultaneously by a controller, allowing steam to enter a plurality of T-shaped steam-curing pipes 18 through the steam conveying pipeline, forming a steam layer in the protective shed, and performing steam curing on the prefabricated box girder;
in this embodiment, according to ambient temperature's minimum temperature, select the maintenance mode of prefabricated box girder, spray maintenance and steam maintenance homoenergetic and realize automated control, reduced constructor's intensity of labour, improved the maintenance effect of prefabricated box girder, convenient to popularize and apply.
Step five, tensioning and sealing the anchor of the pre-stressed steel strand of the precast box girder, and the concrete process comprises the following steps:
step 501, tensioning the prestressed steel strand by using intelligent tensioning equipment;
502, performing primary anchor sealing on the end part of the prestressed steel strand by using an anchor sealing material to enable the end part of the prestressed steel strand to extend out of a first anchor sealing surface;
step 503, circularly grouting into the prestressed duct by using a circular grouting device;
and step 504, performing secondary anchor sealing on the end part of the prestressed steel strand by using an anchor sealing material to enable a second anchor sealing surface to be flush with the end surface of the corrugated pipe.
In this embodiment, divide into first anchor sealing and second anchor sealing through the anchor sealing process with precast box girder prestressing force steel strand wires, can solve the uncompacted phenomenon of mud jacking in the prestressing force pore canal, be convenient for discharge the inside gas of prestressing force pore canal completely in the in-process of circulation mud jacking, can discharge remaining gas in the prestressing force steel strand wires even, improved precast box girder prestressing force steel strand wires's anchor sealing effect greatly.
As shown in fig. 8, in this embodiment, in step 201, when a bottom web plate reinforcement cage is bound, a bar penetrating device is used to penetrate longitudinal reinforcements, the bar penetrating device includes a guide steel pipe 22-1 for being sleeved on an end portion of the longitudinal reinforcement, one end of the guide steel pipe 22-1 is provided with a conical head 22-2, the other end of the guide steel pipe 22-1 is provided with a stepped shaft type cover 22-3, the stepped shaft type cover 22-3 is provided with a longitudinal reinforcement through hole, and an axis of the longitudinal reinforcement through hole coincides with an axis of the guide steel pipe 22-1.
In this embodiment, by providing the guide steel tube 22-1 and providing the tapered head 22-2 at one end of the guide steel tube 22-1, when in actual use, when the bottom plate longitudinal steel bar is inserted into the deployed bottom plate transverse stirrup or the web plate longitudinal steel bar 28 is inserted into the deployed web plate transverse stirrup, only the guide steel tube needs to be sleeved at the end of the bottom plate longitudinal steel bar or the end of the web plate longitudinal steel bar 28, so that the end of the bottom plate longitudinal steel bar or the end of the web plate longitudinal steel bar 28 is tightly pressed against the inner wall of the tapered head 22-2, and in the process of manually pushing the bottom plate longitudinal steel bar or the web plate longitudinal steel bar 28 by a constructor, the end of the bottom plate longitudinal steel bar or the end of the web plate longitudinal steel bar 28 pushes the tapered head 22-2 and the guide steel tube 22-1 to move simultaneously, and at this time, the outer wall of the guide steel tube 22-1 contacts with the bottom plate transverse stirrup or the web plate transverse stirrup, the outer wall of the conical head 22-2 can not be contacted with the transverse stirrups of the bottom plate or the transverse stirrups of the web all the time, so that the collision between the end part of the longitudinal steel bar of the bottom plate and the transverse stirrups of the bottom plate or the collision between the end part of the longitudinal steel bar of the web and the transverse stirrups of the web can be avoided, the continuous penetration of the longitudinal steel bar of the bottom plate or the longitudinal steel bar 28 of the web can be ensured, and the binding efficiency of the web steel reinforcement cage at the bottom of the prefabricated box girder.
As shown in fig. 5, in this embodiment, the spray water conveying pipeline includes a main spray water pipeline 7-1 and a plurality of branch spray water pipelines 7-2 both communicated with the main spray water pipeline 7-1, the main spray water pipeline 7-1 is communicated with a water supply pipeline 19, the branch spray water pipelines 7-2 are pre-embedded under the plurality of prefabricated pedestals 6 located on the same straight line, and the bottom ends of the vertical pipes of the T-shaped spray pipes 17 are communicated with the branch spray water pipelines 7-2.
In this embodiment, the main spray water pipe 7-1 and the plurality of branch spray water pipes 7-2 together form a spray water conveying pipe network communicated with the water supply pipe 19 under the ground of the prefabrication area 1, and can convey spray water for the T-shaped spray pipes 17 of the plurality of prefabrication pedestals 6, and even under the condition that the plurality of prefabrication pedestals 6 are used simultaneously, the conveying requirement of the spray water can be met, so that the prefabrication capacity of the prefabricated beam yard is greatly improved, it should be noted that, because the bottom ends of the vertical pipes of the T-shaped spray pipes 17 need to be communicated with the branch spray water pipes 7-2, the top ends of the vertical pipes of the T-shaped spray pipes 17 are installed in the spray pipe installation holes 6-1, and the bottom ends of the vertical pipes of the T-shaped spray pipes 17 need to be embedded under the ground, during actual construction, for convenience of construction, the vertical pipes of the T-shaped spray pipes 17 are usually designed to be split, namely, the vertical pipe of the T-shaped spray pipe 17 consists of two pipe sections which are detachably connected.
As shown in fig. 6, in this embodiment, the steam conveying pipeline includes a main steam pipeline 8-1 and a plurality of branch steam pipelines 8-2 communicated with the main steam pipeline 8-1, the main steam pipeline 8-1 is communicated with the heat supply pipeline 20, the branch steam pipelines 8-2 are pre-embedded under the plurality of prefabricated pedestals 6 located on the same straight line, and the bottom ends of the vertical pipes of the T-shaped steam curing pipes 18 are communicated with the branch steam pipelines 8-2.
In this embodiment, steam main pipe 8-1 and a plurality of steam branch pipes 8-2 form a steam conveying pipeline network that is linked together with heat supply pipeline 20 jointly in the underground of prefabricated district 1, can steam and nourish pipe 18 for the T style of calligraphy of a plurality of prefabricated pedestals 6 and carry the shower water, even under the condition that a plurality of prefabricated pedestals 6 used simultaneously, also can satisfy the transport requirement of steam, can increase substantially the prefabrication ability in this prefabricated beam yard, and T style of calligraphy evaporates and nourishes the vertical pipe of pipe 18 and also be split type, and T style of calligraphy evaporates and nourishes the vertical pipe of pipe 18 and also comprises two pipe sections that can dismantle the connection promptly.
In this embodiment, the horizontal distance between the shower water branch pipe 7-2 and the steam branch pipe 8-2 located right below the plurality of prefabricated pedestals 6 on the same straight line ranges from 40cm to 50 cm.
In this embodiment, since the embedded depth of the steam delivery pipe is equal to the embedded depth of the spray water delivery pipe, the steam delivery pipe and the spray water delivery pipe must be reasonably arranged, so that the steam delivery pipe and the spray water delivery pipe under the same embedded depth are not affected with each other, and what needs to be reasonably arranged is a plurality of spray water branch pipes 7-2 and a plurality of steam branch pipes 8-2, when a plurality of the prefabricated pedestals 6 on the same straight line share one spray water branch pipe 7-2, and a plurality of the prefabricated pedestals 6 on the same straight line share one steam branch pipe 8-2, the plurality of spray water branch pipes 7-2 and a plurality of steam branch pipes 8-2 are arranged in parallel, and when the horizontal distance between the spray water branch pipes 7-2 and the steam branch pipes 8-2 under the plurality of the prefabricated pedestals 6 on the same straight line has a value range of 40 When the distance is between cm and 50cm, the construction of the steam conveying pipeline and the spray water conveying pipeline is convenient, and meanwhile, the construction safety of the steam conveying pipeline and the spray water conveying pipeline can be ensured.
As shown in fig. 2, in this embodiment, a plurality of reinforcement binding pedestals 12 are uniformly distributed on one side of the prefabrication area close to the reinforcement processing area 2, a storehouse area 13 is arranged between the prefabrication area 1 and the storage area 4, and the storehouse area 13 is close to one side of the roadbed 14.
In this embodiment, it is a plurality of 12 equipartitions of reinforcement pedestal are established and are close to in prefabricated district 1 one side of reinforcement processing district 2, the construction of reinforcement of being convenient for, the transport distance of the reduction material that can be as far as possible, and through set up storehouse district 13 between prefabricated district 1 and storage area 4, and storehouse district 13 is close to one side of road bed 14, and storehouse district 13's area is little, and independent storehouse district 13 can realize depositing raw and other materials or construction tools such as steel strand wires, the bellows, cement for a long time, avoids raw and other materials or construction tools to occupy prefabricated district 1.
In this embodiment, a living area and a small concrete mixing plant are planned in an area close to the plurality of ramps 16, so that the purpose of reasonably utilizing the construction land of the project is achieved.
In this embodiment, the value range of the embedded depth of the steam delivery pipe and the value range of the embedded depth of the spray water delivery pipe are both 80cm to 90 cm.
As shown in fig. 3 and 4, in this embodiment, the storage area 4 is provided with a plurality of beam storage pedestals 5 for supporting the precast beams, the beam storage pedestals 5 are all located in a gantry crane track, the beam storage pedestals 5 are arranged in a double-layer manner, and the beam storage pedestals 5 are of a strip-shaped reinforced concrete structure.
In this embodiment, the prefabrication pedestal 6 is composed of at least three prefabrication pedestal bodies, the length of the prefabrication pedestal body at two ends is smaller than the length of the prefabrication pedestal body at the middle position, two adjacent prefabrication pedestal bodies are connected to each other, a pedestal sleeper beam 9 is arranged below the connection position of the prefabrication pedestal bodies, and the pedestal sleeper beam 9 is located below the ground.
In this embodiment, in step 502, the distance between the end of the prestressed steel strand and the first anchor sealing surface ranges from 10mm to 20 mm.
In this embodiment, in step 503, the circulating grouting device includes a grouting circulation pipeline for connecting two pre-stressed ducts in series, a slurry mixing drum and a mortar pump, which are communicated with the grouting circulation pipeline, and the grouting circulation pipeline is provided with a slurry stop valve; the process of circularly grouting into the prestressed duct by utilizing the circular grouting device comprises the following steps: opening a grout stop valve, starting a mortar pump and a grout mixing drum, and grouting into the prestressed duct to discharge gas in the prestressed duct along the steel strand; then, closing the grout stopping valve, and dismantling the grouting circulating pipeline; and finally, after the slurry in the prestressed duct is solidified, removing the slurry stop valve.
In this embodiment, in step 503, the value range of the pressure of the circulating grouting is 0.5MPa to 0.7MPa, and the pressure duration of the circulating grouting is 3min to 5 min.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (10)
1. An intelligent box girder prefabricating method is characterized by comprising the following steps:
step one, planning a precast beam field:
the precast beam yard comprises a steel bar processing area (2), a precast area (1), a storage area (4) and a main lane (3), wherein the steel bar processing area, the precast area (1) and the storage area (4) are sequentially arranged from a bridge position area to a position close to the bridge position area along the bridge erecting direction, the main lane (3) is arranged between the precast area (1) and the storage area (4) in a penetrating mode along the bridge erecting direction, an electric power cable, a spray water conveying pipeline and a steam conveying pipeline are pre-buried in the underground of the precast area (1), the pre-buried depth of the steam conveying pipeline is equal to the pre-buried depth of the spray water conveying pipeline, the pre-buried depth of the electric power cable is smaller than the pre-buried depth of the steam conveying pipeline, at least two precast production lines which are arranged in parallel along the bridge erecting direction are arranged in the precast production line, the precast production lines comprise a plurality of precast pedestals (6) which, a plurality of spray pipe mounting holes (6-1) which are arranged at intervals along the length direction of the prefabricated pedestal (6) are reserved on the prefabricated pedestal (6), a plurality of steam-curing pipe mounting holes (6-2) which are arranged at intervals along the length direction of the prefabricated pedestal (6) are reserved on the prefabricated pedestal (6), the spray pipe mounting holes (6-1) and the steam-curing pipe mounting holes (6-2) are T-shaped mounting holes, each T-shaped mounting hole comprises a vertical hole section and a horizontal hole section which is communicated with the top end of the vertical hole section and is communicated with the width direction of the prefabricated pedestal (6), a T-shaped spray pipe (17) communicated with the spray water conveying pipeline is mounted in the spray pipe mounting hole (6-1), and a T-shaped steam-curing pipe (18) communicated with the steam conveying pipeline is mounted in the steam-curing pipe mounting hole (6-2), the two ends of a horizontal pipe of each T-shaped spraying pipe (17) are provided with a spray head, the spraying direction of each spray head faces to two side surfaces of the precast beam, a vertical pipe of each T-shaped spraying pipe (17) is provided with a first electromagnetic valve (31), a vertical pipe of each T-shaped steam curing pipe (18) is provided with a second electromagnetic valve (32), and the first electromagnetic valves (31) and the second electromagnetic valves (32) are controlled by a controller;
step two, binding the prefabricated box girder reinforcement cage, and specifically comprising the following steps:
step 201, binding of a bottom web reinforcement cage:
a plurality of reinforcement pedestal (12) are distributed in the reinforcement processing area (2), a bottom web plate reinforcement positioning jig frame for binding a bottom web plate reinforcement cage is arranged on the reinforcement pedestal (12), and the bottom web plate reinforcement cage is bound on the bottom web plate reinforcement positioning jig frame;
step 202, tensioning the longitudinal reinforcing steel bars of the web plate, wherein the specific process comprises the following steps:
step 2021, installing positioning frames at two ends of the bottom web plate reinforcement positioning jig frame, wherein the positioning frames comprise a support (23-1) fixedly connected to the end of the bottom web plate reinforcement positioning jig frame and a positioning plate (23-2) vertically installed on the support (23-1), and a group of web plate longitudinal reinforcement penetrating holes (23-2-1) are formed in the positioning plate (23-2);
step 2022, installing a feed-through hydraulic jack (24) at the end of any one of the web longitudinal steel bars (28), enabling the end face of the feed-through hydraulic jack (24) to tightly abut against the side face of the positioning plate (23-2), driving the feed-through hydraulic jack (24) by a hydraulic pump station (25) to strain the web longitudinal steel bar (28), and then locking the end of any one of the web longitudinal steel bars (28) by using a clip anchorage;
step 203, binding a top plate reinforcement cage, wherein the specific process comprises the following steps:
step 2031, installing a sliding platform device on the top plate steel reinforcement cage positioning jig frame (26):
the sliding platform device comprises a platform (27-1) stretching over a top plate reinforcement cage positioning jig frame (26), upright posts (27-2) installed at two ends of the platform (27-1) and a traveling wheel (27-3) installed at the bottom end of the upright posts (27-2), wherein two linear tracks (27-4) which are parallel to each other and matched with the traveling wheel (27-3) are arranged on the top plate reinforcement cage positioning jig frame (26);
step 2032, binding a plurality of transverse top plate stirrups and a plurality of longitudinal top plate reinforcements of the top plate reinforcement cage on the top plate reinforcement cage positioning jig (26), and then standing on a platform (27-1) by constructors to bind the top plate portal reinforcements;
step three, casting the prefabricated box girder in situ;
closing the hydraulic template device (29), so that a concrete pouring cavity is formed in the hydraulic template device (29), and sequentially hoisting the bottom web reinforcement cage and the top plate reinforcement cage which are bound in the second step into the concrete pouring cavity by using a gantry crane (21); then, pouring concrete into the concrete pouring cavity, and forming a prefabricated box girder;
step four, maintaining the prefabricated box girder:
when the value range of the lowest temperature of the environmental temperature is 10-32 ℃, the controller controls the plurality of first electromagnetic valves (31) to be opened simultaneously, spray water enters the plurality of T-shaped spray pipes (17) through the spray water conveying pipeline and is sprayed on the side surface of the prefabricated box girder through the plurality of spray heads, and the prefabricated box girder is subjected to spray maintenance;
when the lowest temperature of the environment temperature is lower than 5 ℃, a protection shed is erected on the periphery of the prefabricated pedestal (6), a controller controls a plurality of second electromagnetic valves (32) to be opened simultaneously, steam enters a plurality of T-shaped steam curing pipes (18) through the steam conveying pipeline, a steam layer is formed inside the protection shed, and steam curing is carried out on the prefabricated box girder;
step five, tensioning and sealing the anchor of the pre-stressed steel strand of the precast box girder, and the concrete process comprises the following steps:
step 501, tensioning the prestressed steel strand by using intelligent tensioning equipment;
502, performing primary anchor sealing on the end part of the prestressed steel strand by using an anchor sealing material to enable the end part of the prestressed steel strand to extend out of a first anchor sealing surface;
step 503, circularly grouting into the prestressed duct by using a circular grouting device;
and step 504, performing secondary anchor sealing on the end part of the prestressed steel strand by using an anchor sealing material to enable a second anchor sealing surface to be flush with the end surface of the corrugated pipe.
2. An intelligent box girder prefabricating method according to claim 1, characterized in that: in step 201, when the web steel reinforcement cage at the bottom of the ligature, utilize to wear the muscle device and carry out wearing to establish of longitudinal reinforcement, wear the muscle device including being used for the suit at the direction steel pipe (22-1) of longitudinal reinforcement tip, the one end of direction steel pipe (22-1) is provided with conical head (22-2), the shaft type closing cap of step (22-3) is installed to the other end of direction steel pipe (22-1), it passes the hole to have seted up longitudinal reinforcement on the shaft type closing cap of step (22-3), the axis that longitudinal reinforcement passed the hole with the axis of direction steel pipe (22-1) coincides mutually.
3. An intelligent box girder prefabricating method according to claim 1, characterized in that: the spray water conveying pipeline comprises a spray water main pipeline (7-1) and a plurality of spray water branch pipelines (7-2) which are all communicated with the spray water main pipeline (7-1), the spray water main pipeline (7-1) is communicated with a water supply pipeline (19), the spray water branch pipelines (7-2) are pre-buried in a plurality of positions on the same straight line under the prefabricated pedestal (6), and the bottom end of a vertical pipe of the T-shaped spray pipe (17) is communicated with the spray water branch pipelines (7-2).
4. An intelligent precast beam yard according to claim 3, wherein: steam conveying pipeline include steam trunk line (8-1) and a plurality ofly all with steam branch pipeline (8-2) that steam trunk line (8-1) are linked together, steam trunk line (8-1) are linked together with heat supply pipeline (20), steam branch pipeline (8-2) are pre-buried a plurality of that are located collinear under prefabricated pedestal (6), the T style of calligraphy evaporate the bottom of the vertical pipe of curing pipe (18) with steam branch pipeline (8-2) are linked together.
5. An intelligent box girder prefabricating method according to claim 4, characterized in that: the value range of the horizontal distance between the spray water branch pipeline (7-2) and the steam branch pipeline (8-2) which are positioned right below the plurality of prefabricated pedestals (6) on the same straight line is 40 cm-50 cm.
6. An intelligent box girder prefabricating method according to claim 1, characterized in that: a plurality of reinforcement binding pedestal (12) equipartition is established prefabricated district is close to one side of reinforcement processing district (2), be provided with storehouse district (13) between prefabricated district (1) and storage area (4), one side that storehouse district (13) is close to road bed (14).
7. An intelligent box girder prefabricating method according to claim 1, characterized in that: the value range of the embedded depth of the steam conveying pipeline and the value range of the embedded depth of the spray water conveying pipeline are both 80 cm-90 cm.
8. An intelligent box girder prefabricating method according to claim 1, characterized in that: in step 502, the distance between the end of the prestressed steel strand and the first anchor sealing surface ranges from 10mm to 20 mm.
9. An intelligent box girder prefabricating method according to claim 1, characterized in that: in step 503, the circulating grouting device includes a grouting circulating pipeline for connecting two pre-stressed ducts in series, a slurry mixing drum and a mortar pump communicated with the grouting circulating pipeline, and a grout stop valve is installed on the grouting circulating pipeline; the process of circularly grouting into the prestressed duct by utilizing the circular grouting device comprises the following steps: opening a grout stop valve, starting a mortar pump and a grout mixing drum, and grouting into the prestressed duct to discharge gas in the prestressed duct along the steel strand; then, closing the grout stopping valve, and dismantling the grouting circulating pipeline; and finally, after the slurry in the prestressed duct is solidified, removing the slurry stop valve.
10. An intelligent box girder prefabricating method according to claim 1, characterized in that: in step 503, the value range of the pressure of the circulating grouting is 0.5MPa to 0.7MPa, and the pressure duration of the circulating grouting is 3min to 5 min.
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