CN113027156A - Maintenance system is used in case roof beam winter construction - Google Patents
Maintenance system is used in case roof beam winter construction Download PDFInfo
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- CN113027156A CN113027156A CN202110262460.1A CN202110262460A CN113027156A CN 113027156 A CN113027156 A CN 113027156A CN 202110262460 A CN202110262460 A CN 202110262460A CN 113027156 A CN113027156 A CN 113027156A
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- 238000010276 construction Methods 0.000 title claims abstract description 43
- 238000012423 maintenance Methods 0.000 title claims abstract description 31
- 238000010438 heat treatment Methods 0.000 claims abstract description 159
- 238000004321 preservation Methods 0.000 claims abstract description 56
- 238000009413 insulation Methods 0.000 claims abstract description 53
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 7
- 238000001514 detection method Methods 0.000 claims description 21
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 8
- 239000011496 polyurethane foam Substances 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 239000003063 flame retardant Substances 0.000 claims description 6
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 4
- 238000013461 design Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 238000009415 formwork Methods 0.000 description 3
- 230000036571 hydration Effects 0.000 description 3
- 238000006703 hydration reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 208000037656 Respiratory Sounds Diseases 0.000 description 2
- OFCNXPDARWKPPY-UHFFFAOYSA-N allopurinol Chemical compound OC1=NC=NC2=C1C=NN2 OFCNXPDARWKPPY-UHFFFAOYSA-N 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 206010011376 Crepitations Diseases 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000011897 real-time detection Methods 0.000 description 1
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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
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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
- E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
- E04G13/04—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for lintels, beams, or transoms to be encased separately; Special tying or clamping means therefor
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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
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
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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
- E04G21/28—Safety or protective measures preventing damage to building parts or finishing work during construction against unfavourable weather influence
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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
- E04G9/00—Forming or shuttering elements for general use
- E04G9/10—Forming or shuttering elements for general use with additional peculiarities such as surface shaping, insulating or heating, permeability to water or air
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention discloses a maintenance system for box girder winter construction, which comprises an external heating and heat insulation structure arranged at the outer side of a box girder, an internal heating and heat insulation structure used for heating a box chamber of the box girder, and a temperature measurement system used for detecting the temperature of the box girder in real time; the outside of external heating insulation construction is provided with character cut in bas-relief shape bearing structure, and external heating insulation construction is assembled heat preservation template, and assembled heat preservation template's cross section is character cut in bas-relief shape, and assembled heat preservation template is including setting up the bottom template in the case roof beam bottom and two symmetry settings lateral part templates in the bottom template left and right sides, and bottom template and lateral part template are heating type heat preservation template. The box girder thermal insulation structure has novel and reasonable design, and the box girder is heated and maintained by adopting the internal heating thermal insulation structure and the external heating thermal insulation structure, so that cracks on the surface of the concrete caused by overlarge temperature difference between the outer surface of the box girder and the inner part of the concrete are effectively avoided, and the forming quality of the box girder during winter construction is ensured.
Description
Technical Field
The invention belongs to the technical field of civil engineering, and particularly relates to a maintenance system for winter construction of box girders.
Background
In concrete construction, the engineering quality is limited by the environmental temperature, particularly in winter construction, and the influence on the whole construction maintenance, quality and the like is large due to low environmental temperature; the temperature and humidity should be ensured in the curing process of the poured concrete, if the protection measures are not in place and are influenced by low temperature, the hydration action of the cement is hindered, the free moisture in the concrete begins to freeze, the volume is increased, the concrete is easy to crack, and the construction quality is seriously influenced. When the average outdoor daily temperature is lower than 5 ℃ for 5 consecutive days, the construction in winter is realized, the altitude in northern areas of China is high, the climate is dry, the weather is strong weather all the year round, and the basic maintenance of the construction in winter is particularly critical. At present, the construction box girder maintenance in winter mostly adopts to build the canopy warm to use heating such as coal stove to heat up in the warm canopy, need consume a large amount of fuel such as oil, coal in the maintenance period, need set up the humidity that the equipment that moisturizes keeps in the warm canopy simultaneously, increased staff intensity of labour, there is certain potential safety hazard in the work progress, and the box girder construction period is long simultaneously, and the box girder surface easily produces the crackle, and the quality is poor.
Disclosure of Invention
The invention aims to solve the technical problem that aiming at the defects in the prior art, the invention provides the maintenance structure for the box girder construction in winter, the design is novel and reasonable, the box girder is heated and maintained by adopting the internal heating and heat insulation structure and the external heating and heat insulation structure, the crack on the surface of the concrete caused by the overlarge temperature difference between the outer surface of the box girder and the inner part of the concrete is effectively avoided, and the forming quality of the box girder during the construction in winter is ensured.
In order to solve the technical problems, the invention adopts the technical scheme that: the utility model provides a case roof beam is maintenance system for construction in winter which characterized in that: the box girder temperature measurement system comprises an external heating and heat insulation structure arranged on the outer side of a box girder, an internal heating and heat insulation structure used for heating the interior of a box chamber of the box girder, and a temperature measurement system used for detecting the temperature of the box girder in real time;
the external side of the external heating insulation structure is provided with a concave-shaped supporting structure, the external heating insulation structure is an assembled insulation template, the cross section of the assembled insulation template is concave-shaped, the assembled insulation template comprises a bottom template arranged at the bottom of the box girder and two side templates symmetrically arranged at the left side and the right side of the bottom template, and the bottom template and the side templates are both heating insulation templates;
the heating type heat preservation template comprises a template, a heater arranged on the template, and an inner heat preservation layer and an outer heat preservation layer which are arranged on the template and used for coating the heater;
the internal heating heat preservation structure comprises a steam pipeline arranged in the box chamber and a steam supply system for supplying air to the steam pipeline, wherein the steam pipeline is arranged along the length direction of the box chamber, and the number of the steam pipelines is the same as that of the box chamber and corresponds to that of the box chamber one by one.
Foretell box girder is maintenance system for construction in winter, its characterized in that: the template comprises a panel, a lattice frame arranged on the panel and a steel wire mesh arranged on the lattice frame,
the lattice frame comprises an outer frame formed by a plurality of side ribs in a surrounding mode and a support lattice arranged in the outer frame, the outer frame is arranged along the edge line of the panel,
support the lattice and be horizontal well rib that the parallel was laid by the multichannel and the vertical well rib that the parallel was laid of multichannel and assemble and form, every way horizontal well rib all with the multichannel vertical well rib fastening connection is as an organic whole, limit rib, horizontal well rib and vertical well rib all are the perpendicular layout with the panel.
Foretell box girder is maintenance system for construction in winter, its characterized in that: the heater comprises two mutually independent heating belts, the two heating belts are a main heating belt and a standby heating belt respectively, the two heating belts have the same structure, each heating belt is formed by connecting a plurality of heating belt sections in series, and the heating belts are arranged on the steel wire mesh in a snake-shaped wiring mode.
Foretell box girder is maintenance system for construction in winter, its characterized in that: the steam supply system comprises a steam boiler, a steam conveying pipeline communicated with the steam boiler, and a control gate valve arranged on the steam conveying pipeline and used for controlling the gas in the steam conveying pipeline to circulate and shut off;
the end part of the steam conveying pipe, which is far away from the steam boiler, extends into the box chamber, and the end part of the steam pipe is communicated with the end part of the steam conveying pipe, which is far away from the steam boiler.
Foretell box girder is maintenance system for construction in winter, its characterized in that: the temperature measurement system comprises a first temperature detection system for detecting the surface temperature of the box girder, a second temperature detection system for detecting the internal temperature of the box girder and a third temperature detection system for detecting the temperature of the external heating insulation structure on the outer side of the box girder.
Foretell box girder is maintenance system for construction in winter, its characterized in that: the first temperature detection system comprises a first temperature detector arranged at the top of the box girder and positioned at the center of the box girder, two second temperature detectors symmetrically arranged at the end parts of flange plates of the box girder, and a plurality of third temperature detectors arranged at the bottom of the box girder;
the distance between the first temperature detector and the upper surface of the concrete of the box girder is 4 cm-6 cm, the distance between the second temperature detector and the outer surface of the concrete of the box girder is 4 cm-6 cm, and the distance between the third temperature detector and the lower surface of the concrete of the box girder is 4 cm-6 cm.
The second temperature detection system comprises a fourth temperature detector arranged in a web of the box girder, and the fourth temperature detector is positioned at the central position of the web of the box girder.
Foretell box girder is maintenance system for construction in winter, its characterized in that: the third temperature detection system comprises a plurality of fifth temperature detectors which are arranged in the side templates and used for detecting the temperature of the side templates, and a plurality of sixth temperature detectors which are arranged in the bottom template and used for detecting the temperature of the bottom template;
the distances between the fifth temperature detector and the panel and between the sixth temperature detector and the panel are both 2 cm-3 cm.
Foretell box girder is maintenance system for construction in winter, its characterized in that: the first temperature detector, the second temperature detector, the third temperature detector, the fourth temperature detector, the fifth temperature detector and the sixth temperature detector are all RS-WS-N01-6-6 temperature and humidity transmitters, and the RS-WS-N01-6-6 temperature and humidity transmitters are arranged along the length direction of the box girder.
Foretell box girder is maintenance system for construction in winter, its characterized in that: the inner heat-insulating layer and the outer heat-insulating layer are both flame-retardant polyurethane foam layers sprayed on the template.
Foretell box girder is maintenance system for construction in winter, its characterized in that: the heating band is an automatic temperature control electric tracing band.
Compared with the prior art, the invention has the following advantages:
1. according to the invention, the external heating and heat preservation structure is arranged on the outer side of the box girder to heat and preserve heat on the outer side of the box girder, the waterproof heat preservation layer used for coating the upper surface and the end surface of the box girder is arranged on the top of the box girder, and the box girder is coated in the external heating and heat preservation structure and the waterproof heat preservation layer, so that the box girder is isolated from the external environment, and the influence of cold air isolated from the external environment on the quality of the box girder is avoided.
2. The heating belts are arranged in the heating type heat preservation template to heat the heating type heat preservation template, the number of the heating belts is two, the two heating belts are independent, the two heating belts are respectively a main heating belt and a standby heating belt, when the main heating belt breaks down, the standby heating belt is used for heating the heating type heat preservation template, the normal use of the heating type heat preservation template is ensured, the heating type heat preservation template is prevented from being exposed to the external environment to cause concrete cracking of a box girder when the heating type heat preservation template breaks down in the use process, and the use reliability of the heating type heat preservation template is improved.
3. The heating type heat preservation template adopted by the invention is internally provided with an inner heat preservation layer and an outer heat preservation layer which are both flame retardant polyurethane foam layers sprayed on the template, and the heating belt, the steel wire mesh and the template are fastened and connected into a whole by arranging the inner heat preservation layer and the outer heat preservation layer, so that the integrity of the heating type heat preservation template is enhanced; meanwhile, the heat generated by the heating belt is prevented from flowing in the combined type template through the inner heat-insulating layer, and the external cold air is blocked by the outer heat-insulating layer to enter the heating type heat-insulating template, so that the heat-insulating effect of the heating type heat-insulating template is enhanced.
4. The box chamber of the box girder is heated by the internal heating and heat insulation structure, the steam pipeline of the internal heating and heat insulation structure is arranged along the length direction of the box chamber, the length of the steam pipeline is the same as that of the box chamber, the heat dissipation area of the steam pipeline is wide, the box chamber is heated uniformly, heat is transferred to all parts of the box girder, cracks on the surface of the box girder caused by overlarge temperature difference between the inner temperature of concrete of the box girder and the outer surface of the concrete are avoided, and the pouring quality of the box girder is effectively guaranteed.
5. The steam supply system adopted by the invention is a steam boiler, steam is introduced into the box chamber of the box beam through the steam boiler to heat and maintain the box beam, and proper temperature and humidity conditions are provided for the hardening of the concrete of the box beam, so that the concrete strength of the box beam is continuously increased, and the pouring quality of the box beam is improved.
6. The box girder is heated and maintained by adopting the internal heating and heat insulation structure and the external heating and heat insulation structure, so that cracks on the surface of the box girder caused by overlarge temperature difference between the outer surface of the box girder and the inner part of the concrete are avoided, and the forming quality of the box girder during construction in winter is ensured.
In conclusion, the box girder is novel and reasonable in design, the box girder is heated and maintained by adopting the internal heating and heat insulation structure and the external heating and heat insulation structure, cracks on the surface of the concrete caused by overlarge temperature difference between the outer surface of the box girder and the inner part of the concrete are effectively avoided, and the forming quality of the box girder during winter construction is guaranteed.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic structural diagram of the template of the present invention.
FIG. 3 is a schematic structural view of a heated insulation form according to the present invention.
Fig. 4 is a schematic structural view of an internal heating insulation structure according to the present invention.
Description of reference numerals:
1-box girder; 2-a chamber; 3-bottom template;
4-steel wire mesh; 5-heating a belt; 6-inner insulating layer;
7-outer insulating layer; 8-a steam pipeline; 9-a panel;
10-side ribs; 11-transverse mid-rib; 12-vertical mid-rib;
13-a steam boiler; 14-a steam delivery pipe; 15-control gate valve;
16-side form; 17-a bottom support frame; 18-lateral support frame;
19-a first temperature detector; 20-a second temperature detector; 21-third temperature detector;
22-fourth temperature detector; 23-fifth temperature detector; 24-sixth temperature detector;
25-waterproof heat-insulating layer; 26-threaded hole.
Detailed Description
As shown in fig. 1, the present invention includes an external heating insulation structure arranged outside a box girder 1, an internal heating insulation structure for heating the inside of a box chamber 2 of the box girder 1, and a temperature measurement system for detecting the temperature of the box girder 1 in real time;
the external heating insulation structure is characterized in that a concave supporting structure is arranged on the outer side of the external heating insulation structure, the external heating insulation structure is an assembled insulation template, the cross section of the assembled insulation template is concave, the assembled insulation template comprises a bottom template 3 arranged at the bottom of the box girder 1 and two side templates 16 symmetrically arranged on the left side and the right side of the bottom template 3, and the bottom template 3 and the side templates 16 are both heating insulation templates;
the heating type heat preservation template comprises a template, a heater arranged on the template, an inner heat preservation layer 6 and an outer heat preservation layer 7, wherein the inner heat preservation layer 6 and the outer heat preservation layer 7 are arranged on the template and used for coating the heater;
the internal heating heat preservation structure comprises a steam pipeline 8 arranged in the box chamber 2 and a steam supply system for supplying air to the steam pipeline 8, wherein the steam pipeline 8 is arranged along the length direction of the box chamber 2, and the number of the steam pipelines 8 is the same as that of the box chamber 2 and corresponds to that of the box chamber 2 one by one.
In this embodiment, the font bearing structure of drawing in bask cooperatees with external heating insulation construction, the font bearing structure of drawing in bask includes bottom sprag frame 17, two symmetries set up the lateral part braced frame 18 in the bottom sprag frame 17 left and right sides, provide the mounted position for bottom template 3 through setting up bottom sprag frame 17, provide the mounted position for lateral part template 16 through setting up lateral part braced frame 18, bottom sprag frame 17 and lateral part braced frame 18 all adopt current braced frame, bottom sprag frame 17 with install the basket headtotail of hanging at 1 top of case roof beam, lateral part braced frame 18 installs on bottom sprag frame 17, external heating insulation construction carries out effective support.
In this embodiment, it should be noted that the top of the box girder 1 is provided with a waterproof insulating layer 25 for coating the upper surface of the box girder 1 and the end surface of the box girder 1, and the box girder 1 is wrapped in the external heating insulating structure and the waterproof insulating layer 25 by arranging the external heating insulating structure, so that the box girder 1 is isolated from the external environment, and the influence of cold air isolated from the external environment on the quality of the box girder 1 is avoided; the external heating insulation structure is an assembled insulation template, the assembled insulation template comprises a bottom template 3 and two side templates 16 symmetrically arranged at the left side and the right side of the bottom template 3, the side templates 16 and the bottom template 3 are detachably connected into a whole through bolt connecting pieces, the integrity of the assembled insulation template is enhanced, and the insulation effect of the assembled insulation template is further improved; the bottom template 3 and the side template 16 are both heating type heat preservation templates, the heating type heat preservation templates are heated by setting heaters to emit heat, the outer surfaces of the box girders 1 are further heated, the heat loss of the heating type heat preservation templates is slowed down by the inner heat preservation layers 6 and the outer heat preservation layers 7 positioned at the two sides of the heaters, and the heating and heat preservation effects of the heating type heat preservation templates are ensured; through setting up interior heating insulation construction and heating the case room 2 of case roof beam 1 to with heat transfer to the each department of case roof beam 1, avoid the temperature of the inside concrete of case roof beam 1 and the temperature difference of concrete surface too big and lead to 1 surperficial crackles of case roof beam, guaranteed the quality of pouring of case roof beam 1 effectively.
In this embodiment, steam conduit 8 lays along the length direction of case 2, and steam conduit 8's length is the same with the length of case 2, and steam conduit 8's heat radiating area is wide, makes case 2 be heated evenly, guarantees the maintenance effect of case roof beam 1.
As shown in fig. 2 and 3, in this embodiment, the formwork includes a panel 9, a lattice frame provided on the panel, and a steel wire mesh 4 provided on the lattice frame,
the lattice frame comprises an outer frame and a support lattice, wherein the outer frame is formed by surrounding a plurality of side ribs 10, the support lattice is arranged in the outer frame, the outer frame is arranged along the edge line of the panel 9,
support the lattice and be horizontal well rib 11 that the parallel was laid by the multichannel and the vertical well rib 12 that the parallel was laid of multichannel and assemble and form, every the horizontal well rib 11 all with the multichannel vertical well rib 12 fastening connection is as an organic whole, side rib 10, horizontal well rib 11 and vertical well rib 12 all are the perpendicular layout with panel 9.
In this embodiment, it should be noted that the panel 9 and the lattice frame are arranged in parallel, the panel 9 and the lattice frame are cast into a whole, the shape and the size of the outer frame are both the same as those of the panel 9, the panel 9 is a square plate, the outer frame is a square frame surrounded by a plurality of side ribs 10, the support lattice is a rectangular lattice, and the plurality of side ribs 10, the plurality of transverse middle ribs 11, and the plurality of vertical middle ribs 12 are uniformly distributed on the same plane; the edge rib 10 is provided with a plurality of threaded holes 26 along the length direction thereof, so that the connection of two adjacent heating type heat preservation templates is facilitated.
In this embodiment, during the in-service use, wire net 4 is installed on the lattice frame of template, and heating band 5 wears to establish in wire net 4's net, and the installation is convenient fast with the dismantlement, saves time.
As shown in fig. 3, in this embodiment, the heater includes two mutually independent heating belts 5, two heating belts 5 are mainly used heating belt and standby heating belt respectively, two heating belts 5 have the same structure, heating belt 5 is formed by connecting a plurality of heating belt sections in series, and heating belt 5 is arranged on steel wire mesh 4 in a snakelike routing manner.
In the embodiment, the heating belt 5 is sleeved with the protective sleeve, the thickness of the protective sleeve is 1-2 mm, the protective sleeve is made of polyurethane foam, and the polyurethane foam has good heat preservation and waterproof performance, can effectively protect the protective sleeve and cannot influence the normal work of the heating belt 5; the heating type heat preservation template is heated by arranging the main heating belt and the standby heating belt, the main heating belt and the standby heating belt are mutually independent, when the main heating belt breaks down, the standby heating belt heats the heating type heat preservation template, the normal use of the heating type heat preservation template is ensured, the heating type heat preservation template is prevented from being replaced when the heating type heat preservation template breaks down in the using process, the box girder 1 is exposed in the external environment, the concrete of the box girder 1 is prevented from cracking, and the use reliability of the heating type heat preservation template is improved.
As shown in fig. 4, in the present embodiment, the steam supply system includes a steam boiler 13, a steam conveying pipe 14 communicating with the steam boiler 13, and a control gate valve 15 disposed on the steam conveying pipe 14 and used for controlling the gas circulation and shutoff in the steam conveying pipe 14;
the end of the steam conveying pipe 14 remote from the steam boiler 13 projects into the chamber 2, and the end of the steam pipe 8 communicates with the end of the steam conveying pipe 14 remote from the steam boiler 13.
In this embodiment, during actual use, the steam conveying pipe 14 is a T-shaped steam conveying pipe, a vertical section of the steam conveying pipe 14 is exposed in the air, an end of the vertical section of the steam conveying pipe 14 is communicated with the steam boiler 13, a horizontal section of the steam conveying pipe 14 is located in the block 0 of the box girder 1, one end of the steam pipe 8 is communicated with the horizontal section of the steam conveying pipe 14, and the other end of the steam pipe 8 extends to a section to be maintained of the box girder 1.
In the embodiment, steam is introduced into the box chamber 2 of the box girder 1 by adopting the steam boiler 13, and appropriate temperature and humidity conditions are provided for the concrete hardening of the box girder 1, so that the concrete strength of the box girder 1 is continuously increased, and the pouring quality of the box girder 1 is improved.
In this embodiment, the steam boiler 13 supplies air to the steam pipeline 8 through the steam conveying pipeline 14, the control gate valve 15 is arranged on the steam conveying pipeline 14, when the heating of the box chamber 2 of the box beam 1 needs to be temporarily stopped, the control gate valve 15 is closed to stop the heating of the box chamber 2, the steam boiler 13 does not need to stop working, the steam boiler 13 needs to be restarted when the box beam 1 is reheated, and the steam boiler 13 after being restarted is slow in temperature rise and cannot timely meet the heating maintenance requirements of the box beam 1.
In this embodiment, the temperature measurement system includes a first temperature detection system for detecting the surface temperature of the box girder 1, a second temperature detection system for detecting the internal temperature of the box girder 1, and a third temperature detection system for detecting the temperature of the external heating insulation structure outside the box girder 1.
In this embodiment, the first temperature detection system is arranged to detect the outer surface temperature of the box girder 1 in real time, the second temperature detection system is arranged to detect the inner temperature of the box girder 1 in real time, and the heating temperatures of the heating belt 5 and the steam boiler 13 are adjusted according to the temperature data detected by the first temperature detection system and the second temperature detection system, so that the maintenance temperature of the maintenance system meets the maintenance temperature requirement of the box girder 1.
As shown in fig. 1, in the present embodiment, the first temperature detecting system includes a first temperature detector 19 disposed on the top of the box girder 1 and located at the center of the box girder 1, two second temperature detectors 20 symmetrically disposed on the ends of the flange plates of the box girder 1, and a plurality of third temperature detectors 21 disposed on the bottom of the box girder 1;
the distance between the first temperature detector 19 and the upper concrete surface of the box girder 1 is 4-6 cm, the distance between the second temperature detector 20 and the outer concrete surface of the box girder 1 is 4-6 cm, and the distance between the third temperature detector 21 and the lower concrete surface of the box girder 1 is 4-6 cm.
The second temperature detection system comprises a fourth temperature detector 22 arranged in the web of the box girder 1, and the fourth temperature detector 22 is positioned in the center of the web of the box girder 1.
In this embodiment, detect the surface temperature at box girder 1 concrete top through setting up first thermoscope 19, detect the surface temperature of the flange board tip of box girder 1 through setting up second thermoscope 20, detect the surface temperature of box girder 1 concrete bottom through setting up third thermoscope 21, and then realize the real-time detection to box girder 1 surface temperature everywhere, and take the average value with the temperature data that first thermoscope 19, second thermoscope 20 and third thermoscope 21 record as the measured value of box girder 1's concrete surface temperature, improve the accuracy of testing result.
In this embodiment, it should be noted that the left web and the right web of the box girder 1 are positions where the thickness of the concrete poured by the box girder 1 is the thickest, and the fourth temperature detectors 22 are respectively disposed at the central positions of the left web and the right web to detect the temperature of the hydration heat inside the concrete of the box girder 1, so as to control the temperature of the maintenance system during the maintenance of the box girder 1 according to the temperature of the hydration heat inside the concrete of the box girder 1, thereby preventing the surface of the box girder 1 from generating cracks and ensuring the quality of the box girder 1.
As shown in fig. 1, in the present embodiment, the third temperature detecting system includes a plurality of fifth thermometers 23 disposed in the side forms 16 for detecting the temperature of the side forms 16, and a plurality of sixth thermometers 24 disposed in the bottom form 3 for detecting the temperature of the bottom form 3;
the distances between the fifth temperature detector 23 and the panel 9 and between the sixth temperature detector 24 and the panel 9 are both 2 cm-3 cm.
In this embodiment, during actual use, the number of the fifth temperature detectors 23 is the same as and corresponds to the number of the heating zone segments of the heating zone 5 in the side template 16, and whether the heating zone segments in the side template 16 are damaged is detected by setting the fifth temperature detectors 23, when a heating zone segment in a plurality of heating zone segments is damaged, the temperature value detected by the fifth temperature detector 23 corresponding to the damaged heating zone is far lower than the temperature values detected by the other fifth temperature detectors 23, at this time, the operation of the side template 16 needs to be switched from the operation of the main heating zone to the operation of the standby heating zone, so as to ensure the operation reliability of the side template 16.
In this embodiment, during actual use, the number of the sixth temperature detectors 24 is the same as the number of the heating zone segments of the heating zone 5 in the bottom template 3, and the sixth temperature detectors 24 are arranged to detect whether the heating zone segments in the bottom template 3 are damaged, and when a heating zone segment in a plurality of heating zone segments is damaged, the temperature value detected by the sixth temperature detector 24 corresponding to the damaged heating zone is far lower than the temperature values detected by the other sixth temperature detectors 24, at this time, the bottom template 3 needs to be switched from the main heating zone to the standby heating zone to work, so as to ensure the working reliability of the bottom template 3.
In this embodiment, the first temperature detector 19, the second temperature detector 20, the third temperature detector 21, the fourth temperature detector 22, the fifth temperature detector 23, and the sixth temperature detector 24 are all RS-WS-N01-6-6 temperature and humidity transmitters, and the RS-WS-N01-6-6 temperature and humidity transmitters are arranged along the length direction of the box girder 1.
In this embodiment, in actual use, the first temperature detector 19, the second temperature detector 20, the third temperature detector 21, the fourth temperature detector 22, the fifth temperature detector 23, and the sixth temperature detector 24 are preferably RS-WS-N01-6-6 temperature and humidity transmitters, the length of the probe of the RS-WS-N01-6-6 temperature and humidity transmitter is equal to that of the box girder 1, the temperature of the whole box girder 1 can be detected, and the detection accuracy is high.
In this embodiment, the inner insulating layer 6 and the outer insulating layer 7 are both flame retardant polyurethane foam layers sprayed on the template.
In this embodiment, during the in-service use, after 5 installations of heating tape on wire net 4 were accomplished, through heat preservation 6 and outer heat preservation 7 in the fire-retardant polyurethane foam layer of on-the-spot spraying on the template, heat preservation 6 and outer heat preservation 7 including the heating tape 5 parcel between, and through on-the-spot spraying fire-retardant polyurethane foam layer on the template can be as an organic whole with heating tape 5, wire net 4 and template fastening connection, strengthened the wholeness of heating formula heat preservation template, it is effectual to keep warm.
In this embodiment, the heating belt 5 is a self-temperature-controlled electric tracing belt.
In this embodiment, during practical use, the plurality of heating band sections of heating band 5 all adopt the automatic control temperature electric tracing band, and automatic control temperature electric tracing band self can give off a large amount of heats, and the heat that the automatic control temperature electric tracing band distributes can be regulated and control and can keep constant temperature for a long time, is convenient for adjust the temperature of heating type heat preservation template when the heating maintenance of case roof beam 1, guarantees the maintenance quality of case roof beam 1.
When the box girder 1 is maintained, the top of the box girder 1 is provided with a waterproof heat-insulating layer 25 for coating the upper surface of the box girder 1 and the end surface of the box girder 1, a steam boiler 13 and a control gate valve 15 on a steam conveying pipeline 14 are opened, steam generated by the steam boiler 13 is conveyed into a box chamber 2 of the box girder 1 through the steam conveying pipeline 14 to heat and maintain the box chamber 2, and meanwhile, a main heating belt of a bottom template 3 and two side templates 16 is opened, the main heating belt radiates heat to heat the bottom template 3 and the two side templates 16, so that the outer surface of the box girder 1 is heated and maintained; when the box girder 1 is heated and maintained, the outer surface temperature of the concrete at each position of the box girder 1 is detected in real time through the first temperature detector 19, the second temperature detector 20 and the third temperature detector 21, the average value of the temperature values detected by the first temperature detector 19, the second temperature detector 20 and the third temperature detector 21 is used as the outer surface temperature of the box girder 1, and the heating temperatures of the steam boiler 13, the bottom formwork 3 and the two side formworks 16 are adjusted to enable the outer surface temperature of the box girder 1 to meet the maintenance temperature requirement of the box girder 1.
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. The utility model provides a case roof beam is maintenance system for construction in winter which characterized in that: the temperature measuring device comprises an external heating and heat insulating structure arranged on the outer side of a box girder (1), an internal heating and heat insulating structure used for heating the interior of a box chamber (2) of the box girder (1), and a temperature measuring system used for detecting the temperature of the box girder (1) in real time;
the external heating insulation structure is characterized in that a concave supporting structure is arranged on the outer side of the external heating insulation structure, the external heating insulation structure is an assembled insulation template, the cross section of the assembled insulation template is concave, the assembled insulation template comprises a bottom template (3) arranged at the bottom of the box girder (1) and two side templates (16) symmetrically arranged on the left side and the right side of the bottom template (3), and the bottom template (3) and the side templates (16) are both heating insulation templates;
the heating type heat preservation template comprises a template, a heater arranged on the template, and an inner heat preservation layer (6) and an outer heat preservation layer (7) which are arranged on the template and used for coating the heater;
interior heating insulation construction carries out the steam supply system of air feed including setting up steam conduit (8) in cabinet (2) and steam conduit (8), steam conduit (8) are laid along the length direction of cabinet (2), the same and the one-to-one correspondence of quantity of steam conduit (8) and cabinet (2).
2. The curing system for box girder construction in winter as claimed in claim 1, wherein: the template comprises a panel (9), a lattice frame arranged on the panel and a steel wire mesh (4) arranged on the lattice frame,
the lattice frame comprises an outer frame formed by a plurality of side ribs (10) in a surrounding mode and a support lattice arranged in the outer frame, the outer frame is arranged along the edge line of the panel (9),
support the lattice and be horizontal well rib (11) that the parallel was laid by the multichannel and vertical well rib (12) that the parallel was laid of multichannel are assembled and form, every way horizontal well rib (11) all with the multichannel vertical well rib (12) fastening connection is as an organic whole, limit rib (10), horizontal well rib (11) and vertical well rib (12) all are perpendicular the laying with panel (9).
3. The maintenance system for box girder construction in winter according to claim 2, wherein: the heater includes two mutually independent heating strips (5), two heating strip (5) are main heating strip and reserve heating strip, two respectively the structure of heating strip (5) is the same, heating strip (5) are formed by a plurality of heating strip section series connection, heating strip (5) are snakelike line mode of walking and lay on wire net (4).
4. The curing system for box girder construction in winter as claimed in claim 1, wherein: the steam supply system comprises a steam boiler (13), a steam conveying pipeline (14) communicated with the steam boiler (13), and a control gate valve (15) arranged on the steam conveying pipeline (14) and used for controlling the gas in the steam conveying pipeline (14) to circulate and shut off;
the end of the steam conveying pipe (14) far away from the steam boiler (13) extends into the box chamber (2), and the end of the steam pipe (8) is communicated with the end of the steam conveying pipe (14) far away from the steam boiler (13).
5. The curing system for box girder construction in winter as claimed in claim 1, wherein: the temperature measurement system comprises a first temperature detection system for detecting the surface temperature of the box girder (1), a second temperature detection system for detecting the internal temperature of the box girder (1), and a third temperature detection system for detecting the temperature of the external heating and heat preservation structure on the outer side of the box girder (1).
6. The curing system for box girder construction in winter as claimed in claim 5, wherein: the first temperature detection system comprises a first temperature detector (19) arranged at the top of the box girder (1) and positioned at the center of the box girder (1), two second temperature detectors (20) symmetrically arranged at the end parts of the flange plates of the box girder (1), and a plurality of third temperature detectors (21) arranged at the bottom of the box girder (1);
the distance between the first temperature detector (19) and the upper surface of the concrete of the box girder (1) is 4-6 cm, the distance between the second temperature detector (20) and the outer surface of the concrete of the box girder (1) is 4-6 cm, and the distance between the third temperature detector (21) and the lower surface of the concrete of the box girder (1) is 4-6 cm;
the second temperature detection system comprises a fourth temperature detector (22) arranged in a web of the box girder (1), and the fourth temperature detector (22) is located at the center of the web of the box girder (1).
7. The curing system for box girder construction in winter as claimed in claim 6, wherein: the third temperature detection system comprises a plurality of fifth temperature detectors (23) which are arranged in the side templates (16) and used for detecting the temperature of the side templates (16), and a plurality of sixth temperature detectors (24) which are arranged in the bottom template (3) and used for detecting the temperature of the bottom template (3);
the distances between the fifth temperature detector (23) and the panel (9) and between the sixth temperature detector (24) and the panel (9) are both 2 cm-3 cm.
8. The curing system for box girder construction in winter as claimed in claim 7, wherein: the first temperature detector (19), the second temperature detector (20), the third temperature detector (21), the fourth temperature detector (22), the fifth temperature detector (23) and the sixth temperature detector (24) are all RS-WS-N01-6-6 temperature and humidity transmitters, and the RS-WS-N01-6-6 temperature and humidity transmitters are arranged along the length direction of the box girder (1).
9. The curing system for box girder construction in winter as claimed in claim 1, wherein: the inner heat-insulating layer (6) and the outer heat-insulating layer (7) are both flame-retardant polyurethane foam layers sprayed on the template.
10. The curing system for box girder construction in winter as claimed in claim 3, wherein: the heating belt (5) is an automatic temperature control electric tracing belt.
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| CN202110262460.1A CN113027156A (en) | 2021-03-10 | 2021-03-10 | Maintenance system is used in case roof beam winter construction |
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| CN202110262460.1A CN113027156A (en) | 2021-03-10 | 2021-03-10 | Maintenance system is used in case roof beam winter construction |
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