CN106239711A - A kind of cast-in-situ concrete member maintenance process in winter - Google Patents
A kind of cast-in-situ concrete member maintenance process in winter Download PDFInfo
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- CN106239711A CN106239711A CN201610735285.2A CN201610735285A CN106239711A CN 106239711 A CN106239711 A CN 106239711A CN 201610735285 A CN201610735285 A CN 201610735285A CN 106239711 A CN106239711 A CN 106239711A
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- concrete
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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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- Engineering & Computer Science (AREA)
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- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The present invention relates to engineering construction technology field, in particular to a kind of cast-in-situ concrete member maintenance process in winter.Concrete component is built heat-insulating brooder, logical steam in heat-insulating brooder, arrange thermal source in the bottom of concrete component to heat bottom concrete component, and monitor the temperature of concrete base and concrete component top, each several part Homogeneouslly-radiating of concrete component is made by adjusting bottom-heated temperature.The present invention arranges heat source by the bottom at concrete component, ensure that concrete component each several part dispels the heat uniformly, avoid the problem because of the concrete cracking that bottom and top heat dissipation heterogeneity cause in the winter time, improve the effect of maintenance, ensure that the structural strength of concrete component, there is great promotional value.
Description
Technical field
The present invention relates to engineering construction technology field, in particular to a kind of cast-in-situ concrete member in winter maintenance side
Method.
Background technology
There is longer cold season the northern area of China.Owing to being restricted by the duration, the concreting in cold weather of many engineerings
It is inevitable.Theoretical to concreting in cold weather and method exploratory development both at home and abroad is thought, when ambient temperature drops to 5 DEG C
Time, as long as using suitable construction method, it is to avoid pouring concrete early freezc, also can obtain as warming up effect during construction in sky.
Measures of concrete construction in winter is varied, comprise adjustment match ratio, accumulation of heat, insulation, external heat, mix freeze proof outside
Add the measures such as agent.But every kind of measure has its limitation and applicable elements.
Current conventional maintenance process is the most all natural curing and two kinds of methods of heating curing, and cast-in-place concrete is normally
Under the conditions of generally use natural curing, and maintenance process conventional in constructing in the winter time is outside heating method, i.e. makes to mix with steam
Solidifying soil hardens under wet heat condition, and this outside heating method is relatively easy to control, and heating-up temperature is uniform, but should be need to build special
The most special boiler plant of large insulation brooder, usual maintenance costs is higher, is unfavorable for promoting the use of.
There is patent to propose a kind of small-sized special maintenance structure of use and cast-in-situ concrete member in winter is carried out maintenance, specially
Profit number is the practical patent of China of entitled " a kind of primary structural component Maintenance in Winter equipment " of " CN203765774U ", and this patent is passed through
Using double glazing cover as heat-insulating brooder, be additionally provided with special steam kettle and provide the steam of maintenance, steam kettle is by steaming
Steam pipe road connects with heat-insulating brooder, is additionally provided with fan in heat-insulating brooder, it is ensured that steam can uniformly enter heat-insulating brooder
In arbitrary place, make temperature in heat-insulating brooder maintain uniform state.This structure is relatively simple, and the material and facility of use is also
The most cheap and easy to get, but simply cover on concrete component due to heat-insulating brooder, and the lower end of concrete component is seated in
On member base, concrete component is in maintenance processes, and being heated between its upper end and side and ground is uneven, so
Nonuniform heating easily cause concrete component top and bottom the biggest temperature difference occur, the temperature difference can cause again concrete component
Each several part deformation is inconsistent, and concrete component is just easy to crack occur in maintenance processes, affects later stage use.
Summary of the invention
Present invention aim to solve the deficiency of above-mentioned background technology, it is provided that one cast-in-situ concrete member in winter is supported
Maintaining method.
The technical scheme is that a kind of cast-in-situ concrete member maintenance process in winter, it is characterised in that: at concrete
Building heat-insulating brooder on component, in heat-insulating brooder, logical steam, arranges thermal source to concrete component in the bottom of concrete component
Bottom is heated, and monitors the temperature of concrete base and concrete component top, reduces by adjusting bottom-heated temperature
The temperature difference bottom concrete component and between top.
The most described method comprises the following steps:
1), on concrete component, build heat-insulating brooder, jet chimney is evenly arranged in heat-insulating brooder；
2), the heat source being evenly arranged is set in the bottom of concrete component；
3) in heat-insulating brooder, by jet chimney it is passed through steam, opens thermal source and the bottom of concrete component is added
Heat；
4), the monitoring bottom of concrete component and the temperature at top, by adjust thermal source control bottom concrete component with
The temperature difference between top；
5), until the intensity of concrete component reach design require time, stop being passed through steam and heating, remove heat-insulating brooder,
Jet chimney and thermal source, complete maintenance.
In further step 1, the building method of heat-insulating brooder is: the both sides of concrete component and above build steel pipe
Support, then the heat-insulating brooder structure on concrete component is shrouded in the formation of laying insulation greenhouse cloth on steel pipe support.
In further step 1, the method for arranging of jet chimney is: is fixed on steel pipe support by jet chimney, makes steaming
Steam pipe road is suspended in the surface of concrete component.
In further step 2, the method for arranging of heat source is: lay one below the bottom template of concrete component
Layer electric heating film, makes electric heating film contact with the lower surface of the bottom template of concrete component.
In further step 4, bottom concrete component, the method with head temperature monitoring is: surveyed by laser thermodetector
Temperature in amount heat-insulating brooder, as the head temperature of concrete component, measures the temperature conduct of the bottom template of concrete component
The bottom temp of concrete component.
In further step 4, the method controlling the temperature difference bottom concrete component and between top is: when concrete structure
When the head temperature of part exceeds bottom temp 10 DEG C, open electric heating film and the bottom of concrete component is heated, reduce top
In the temperature difference of portion and bottom to 0～10 DEG C, when the head temperature of concrete component is low go out bottom temp 10 DEG C time, close electricity add
Hotting mask stops the bottom-heated to concrete component, reduces in the temperature difference to 0～10 DEG C of top and bottom.
The lower section of the most described electric heating film is also equipped with one layer of heat preservation plate.
The most described wet seam of the concrete that concrete component is bondbeam；Supporting of the wet seam of described concrete
Maintaining method is: 1), build steel pipe support on the concrete slab of concrete wet seam both sides, lays tarpaulin on steel pipe support,
The bottom end cover of tarpaulin is combined on the concrete slab of both sides, then jet chimney is installed on steel pipe support；
2), by electric heating film it is laid on bottom the wet seam of concrete on the lower surface of template, then warming plate is laid on electricity
On the lower surface of heating film；
3) in heat-insulating brooder, by jet chimney it is passed through steam, opens the bottom of electric heating film seam wet to concrete
Heat；
4), use temperature that laser thermodetector measures in heat-insulating brooder as head temperature, measure at the bottom of the wet seam of concrete
The temperature of portion's template, as bottom temp, controls electric heating film and adjusts the temperature difference of head temperature and bottom temp at 0～10 DEG C
In；
5), until the intensity of the wet seam of concrete reach design require time, stop being passed through steam and heating, remove insulation warm
Canopy, jet chimney, electric heating film and warming plate, complete maintenance.
When the lower end of the most described wet seam of concrete contacts with the girder steel of bondbeam, electric heating film is attached to
On the girder steel lower surface that seam wet with concrete contacts, then on the lower surface of electric heating film, lay warming plate, use Laser Measuring
The temperature bottom temp as the wet seam of concrete of the girder steel of electric heating film is posted in temperature instrument measurement.
The present invention arranges heat source by the bottom at concrete component, it is to avoid because bottom and top are deposited in the winter time
In the problem of the concrete cracking that the bigger temperature difference causes, improve the effect of maintenance, it is ensured that the structural strength of concrete component,
There is great promotional value.
Accompanying drawing explanation
The structural representation of Fig. 1: the present invention；
The plan structure schematic diagram of Fig. 2: the present invention；
Wherein: 1 girder steel；2 concrete slabs；The 3 wet seams of concrete；4 steel pipe supports；5 insulation greenhouse cloths；6—
Jet chimney；7 electric heating films；8 warming plates.
Detailed description of the invention
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
Now with bondbeam wet seam pouring structure, this maintenance process is illustrated.Bondbeam refers to adopt in the compressive region of beam
Girder steel (plate girder, steel box-girder, steel truss) is used to lead to concrete (armoured concrete slab, prestressed concrete plate), tensile region
Cross shear connector and be combined into a kind of combined type beam of the common stress in cross section, compatibility of deformation, also known as composite beam.The structure of bondbeam
Being usually lower floor and lay girder steel 1, upper strata laying mixed concrete board 2, as in figure 2 it is shown, concrete slab 2 is the square plate poured
Shape material, the wet seam of position cast-in-place concrete 3 between concrete slab 2, make all of concrete slab 2 be connected to become overall knot
Structure.
The present embodiment is mainly seam 3 wet to concrete and carries out maintenance, and the structure of maintenance includes heat-insulating brooder, jet chimney
6, electric heating film 7 and warming plate 8.
As shown in Fig. 1～2, the building method of heat-insulating brooder is: the both sides of the wet seam of concrete 3 and above build steel pipe
Support 4, including the steel pipe that vertical, horizontal cross and level are longitudinal, builds the skeleton forming heat-insulating brooder, then at steel pipe support 4
Upper laying insulation greenhouse cloth 5 is formed and shrouds the heat-insulating brooder structure in the wet seam of concrete 3.Insulation greenhouse cloth 5 includes being laid on steel
Polyethylene tarpaulin on pipe holder 4 and the cotton tarpaulin being laid on polyethylene tarpaulin.Heat-insulating brooder is positioned at the wet seam of concrete 3
The wet seam of whole concrete 3 is shrouded in top.
During the wet seam 3 of actual casting concrete, it is generally required to arrange bottom template in lower end, bottom template is it is generally required to mistake
Open the girder steel 1 of bondbeam lower end, i.e. a part and be positioned at the girder steel 1 immediately below the wet seam of concrete 3 as the one of bottom template
Part.
The present embodiment is too fast, in the wet seam of concrete 3 in order to ensure that concrete wet seam 3 bottom temp is unlikely to decline
Bottom is provided with electric heating film 7, and the electric heating film 7 of the present embodiment is fitted in the lower surface of bottom template, is covered with whole concrete
The bottom of wet seam 3.For being positioned at the girder steel 1 immediately below the wet seam of concrete 3, electric heating film 7 lays girder steel 1 in this section
Lower surface.
Heat in order to make electric heating film 7 produce more is concentrated, and the present embodiment is provided with guarantor in the lower surface of electric heating film 7
Temperature plate 8, avoids heat to lose from below by warming plate 8, makes heat more focus in the wet seam of concrete 3.
Concrete maintenance process is: 1), builds heat-insulating brooder in the wet seam of concrete 3, is evenly arranged by jet chimney 6
In heat-insulating brooder, jet chimney 6 is fixed on steel pipe support 4 surface being positioned at the wet seam of concrete 3；
2), laying electric heating film 7 in the bottom template of the wet seam of concrete 3, a part of electric heating film 7 is laid on just
On girder steel 1 lower surface passed, the lower surface of electric heating film 7 is laid warming plate 8；
3) in heat-insulating brooder, by jet chimney 6 it is passed through steam, opens the end of electric heating film 7 seam wet to concrete 3
Portion heats；
4), use laser thermodetector to measure the temperature in heat-insulating brooder, and this temperature is pushed up as the wet seam of concrete 3
The reference value of portion's temperature, uses laser thermodetector measurement to post template bottom the girder steel 1 of electric heating film 7 and the wet seam of concrete 3
Temperature, as the reference value of concrete wet seam 3 bottom temp, the difference of two temperature is controlled 0～10 DEG C with
In, when head temperature is too high, open electric heating film 7, make bottom temp raise, when head temperature is too low, close electrical heating
Film 7 stops heating, reduces bottom temp, it is to avoid the excessive irregular deformation caused of temperature-difference；
5), until the intensity of the wet seam of concrete 3 reach design require time, stop being passed through steam and heating, remove insulation warm
Canopy, jet chimney 6 and electric heating film 7 and warming plate 8, complete maintenance.
The ultimate principle of the present invention, principal character and advantages of the present invention have more than been shown and described.The technology of the industry
Personnel, it should be appreciated that the present invention is not restricted to the described embodiments, simply illustrating this described in above-described embodiment and description
The principle of invention, the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these become
Change and improvement both falls within scope of the claimed invention.Claimed scope by appending claims and
Equivalent defines.
Claims (10)
1. a cast-in-situ concrete member maintenance process in winter, it is characterised in that: on concrete component, build heat-insulating brooder, to
In heat-insulating brooder, logical steam, arranges heat source in the bottom of concrete component and heats bottom concrete component, and supervise
Depending on the temperature of concrete base Yu concrete component top, by adjust bottom-heated temperature reduce the bottom of concrete component with
The temperature difference between top.
2. a kind of cast-in-situ concrete member maintenance process in winter as claimed in claim 1, it is characterised in that: described method bag
Include following steps:
1), on concrete component, build heat-insulating brooder, jet chimney (6) is evenly arranged in heat-insulating brooder；
2), the heat source being evenly arranged is set in the bottom of concrete component；
3) in heat-insulating brooder, by jet chimney (6) it is passed through steam, opens thermal source and the bottom of concrete component is added
Heat；
4), the monitoring bottom of concrete component and the temperature at top, control bottom concrete component and top by adjusting thermal source
Between the temperature difference；
5), until the intensity of concrete component reach design require time, stop being passed through steam and heating, remove heat-insulating brooder, steam
Pipeline (6) and thermal source, complete maintenance.
3. a kind of cast-in-situ concrete member maintenance process in winter as claimed in claim 2, it is characterised in that: in step 1, insulation
The building method of brooder is: the both sides of concrete component and above build steel pipe support (4), then on steel pipe support (4) upper berth
If insulation greenhouse cloth (5) is formed shrouds the heat-insulating brooder structure on concrete component.
4. a kind of cast-in-situ concrete member maintenance process in winter as claimed in claim 2, it is characterised in that: in step 1, steam
The method for arranging of pipeline (6) is: be fixed on steel pipe support (4) by jet chimney (6), makes jet chimney (6) be suspended in coagulation
The surface of soil component.
5. a kind of cast-in-situ concrete member maintenance process in winter as claimed in claim 1 or 2, it is characterised in that: described adds
Thermal source is electric heating film (7), is laid on the lower surface of bottom template of concrete component by electric heating film (7), makes electricity add
Concrete component is heated by hotting mask (7).
6. a kind of cast-in-situ concrete member maintenance process in winter as claimed in claim 2, it is characterised in that: in step 4, coagulation
The method of soil member bottom section and head temperature monitoring is: measure the temperature in heat-insulating brooder as concrete by laser thermodetector
The head temperature of component, bottom measurement concrete component, the temperature of template is as the bottom temp of concrete component.
7. a kind of cast-in-situ concrete member maintenance process in winter as claimed in claim 2, it is characterised in that: in step 4, control
The method of the temperature difference bottom concrete component and between top is: when the head temperature of concrete component exceeds bottom temp 10 DEG C
Time, open electric heating film (7) and the bottom of concrete component is heated, reduce the temperature difference to 0～10 DEG C of top and bottom
In, when the head temperature of concrete component is low go out bottom temp 10 DEG C time, close electric heating film (7) stop to concrete component
Bottom-heated, reduces in the temperature difference to 0～10 DEG C of top and bottom.
8. a kind of cast-in-situ concrete member maintenance process in winter as claimed in claim 5, it is characterised in that: described electrical heating
The lower section of film (7) is also equipped with one layer of heat preservation plate (8).
9. a kind of cast-in-situ concrete member maintenance process in winter as claimed in claim 1, it is characterised in that: described concrete
Component is the wet seam of the concrete (3) of bondbeam；The maintenance process of the wet seam of described concrete (3) is: 1), wet at concrete
Build steel pipe support (4) on the concrete slab (2) of seam (3) both sides, steel pipe support (4) is laid insulation greenhouse cloth (5), will protect
The bottom end cover of temperature tarpaulin (5) is combined on the concrete slab (2) of both sides, then installs jet chimney (6) on steel pipe support (4)；
2), by electric heating film (7) it is laid on the lower surface of the wet seam of concrete (3) bottom template, then warming plate (8) is laid
On the lower surface of electric heating film (7)；
3) in heat-insulating brooder, by jet chimney (6) it is passed through steam, opens electric heating film (7) seam wet to concrete (3)
Bottom is heated；
4), use the temperature that laser thermodetector is measured in heat-insulating brooder as head temperature, the measurement wet seam of concrete (3) bottom
The temperature of template, as bottom temp, controls electric heating film (7) and adjusts the temperature difference of head temperature and bottom temp at 0～10 DEG C
In；
5), until the intensity of the wet seam of concrete (3) reach design require time, stop being passed through steam and heating, remove heat-insulating brooder,
Jet chimney (6), electric heating film (7) and warming plate (8), complete maintenance.
10. a kind of cast-in-situ concrete member maintenance process in winter as claimed in claim 9, it is characterised in that: described coagulation
When the lower end of the wet seam of soil (3) contacts with the girder steel (1) of bondbeam, electric heating film (7) is attached to seam wet with concrete (3)
On girder steel (1) lower surface of contact, then on the lower surface of electric heating film (7), lay warming plate (8), use laser thermodetector to survey
Amount posts the temperature bottom temp as the wet seam of concrete (3) of the girder steel (1) of electric heating film (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610735285.2A CN106239711A (en) | 2016-08-26 | 2016-08-26 | A kind of cast-in-situ concrete member maintenance process in winter |
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|---|---|---|---|
| CN201610735285.2A CN106239711A (en) | 2016-08-26 | 2016-08-26 | A kind of cast-in-situ concrete member maintenance process in winter |
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| CN106239711A true CN106239711A (en) | 2016-12-21 |
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| CN201610735285.2A Pending CN106239711A (en) | 2016-08-26 | 2016-08-26 | A kind of cast-in-situ concrete member maintenance process in winter |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110590398A (en) * | 2019-08-28 | 2019-12-20 | 中铁大桥局集团第一工程有限公司 | Heating maintenance method for thin-wall concrete of steel-concrete composite beam |
| CN110629877A (en) * | 2019-09-17 | 2019-12-31 | 中国化学工程第六建设有限公司 | Construction method of settler frame applied to winter weather |
| CN110983974A (en) * | 2019-11-21 | 2020-04-10 | 中交第二航务工程局有限公司 | Comprehensive maintenance method for concrete box girder construction in winter |
| CN112982173A (en) * | 2021-02-25 | 2021-06-18 | 中建八局第四建设有限公司 | Winter construction and health maintenance method for bridge expansion joint |
| CN113265946A (en) * | 2021-04-17 | 2021-08-17 | 北京市市政二建设工程有限责任公司 | Self-heating template capable of being rapidly installed at wet joint of bridge |
| CN113463923A (en) * | 2021-07-19 | 2021-10-01 | 宋雨 | Safe building construction method under low-temperature condition in winter |
| CN113719144A (en) * | 2021-07-13 | 2021-11-30 | 中铁十九局集团有限公司 | Method for construction and maintenance of beam body in winter |
| CN116591042A (en) * | 2023-03-13 | 2023-08-15 | 中交一公局第二工程有限公司 | UHPC bridge deck wet joint winter construction maintenance device and maintenance method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110590398A (en) * | 2019-08-28 | 2019-12-20 | 中铁大桥局集团第一工程有限公司 | Heating maintenance method for thin-wall concrete of steel-concrete composite beam |
| CN110629877A (en) * | 2019-09-17 | 2019-12-31 | 中国化学工程第六建设有限公司 | Construction method of settler frame applied to winter weather |
| CN110983974A (en) * | 2019-11-21 | 2020-04-10 | 中交第二航务工程局有限公司 | Comprehensive maintenance method for concrete box girder construction in winter |
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| CN112982173A (en) * | 2021-02-25 | 2021-06-18 | 中建八局第四建设有限公司 | Winter construction and health maintenance method for bridge expansion joint |
| CN113265946A (en) * | 2021-04-17 | 2021-08-17 | 北京市市政二建设工程有限责任公司 | Self-heating template capable of being rapidly installed at wet joint of bridge |
| CN113719144A (en) * | 2021-07-13 | 2021-11-30 | 中铁十九局集团有限公司 | Method for construction and maintenance of beam body in winter |
| CN113463923A (en) * | 2021-07-19 | 2021-10-01 | 宋雨 | Safe building construction method under low-temperature condition in winter |
| CN116591042A (en) * | 2023-03-13 | 2023-08-15 | 中交一公局第二工程有限公司 | UHPC bridge deck wet joint winter construction maintenance device and maintenance method |
| CN116591042B (en) * | 2023-03-13 | 2024-05-28 | 中交一公局第二工程有限公司 | UHPC bridge deck wet joint winter construction maintenance device and maintenance method |
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Application publication date: 20161221 |