CN106759359A - It is a kind of based on air-cooled mass concrete cooling device, construction method and application - Google Patents
It is a kind of based on air-cooled mass concrete cooling device, construction method and application Download PDFInfo
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- CN106759359A CN106759359A CN201710106315.8A CN201710106315A CN106759359A CN 106759359 A CN106759359 A CN 106759359A CN 201710106315 A CN201710106315 A CN 201710106315A CN 106759359 A CN106759359 A CN 106759359A
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- 239000004567 concrete Substances 0.000 title claims abstract description 123
- 238000001816 cooling Methods 0.000 title claims abstract description 41
- 238000010276 construction Methods 0.000 title claims abstract description 30
- 238000009423 ventilation Methods 0.000 claims abstract description 59
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 230000007246 mechanism Effects 0.000 claims description 45
- 238000012544 monitoring process Methods 0.000 claims description 21
- 230000015271 coagulation Effects 0.000 claims description 10
- 238000005345 coagulation Methods 0.000 claims description 10
- 230000000887 hydrating effect Effects 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 6
- 230000008602 contraction Effects 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 239000011398 Portland cement Substances 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 4
- 239000011083 cement mortar Substances 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 239000002352 surface water Substances 0.000 claims description 4
- 239000004568 cement Substances 0.000 claims description 3
- 239000003595 mist Substances 0.000 claims description 3
- 239000002689 soil Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 230000006641 stabilisation Effects 0.000 claims description 2
- 238000011105 stabilization Methods 0.000 claims description 2
- 239000002002 slurry Substances 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 4
- 230000007812 deficiency Effects 0.000 abstract description 3
- 239000013589 supplement Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 9
- 230000000087 stabilizing effect Effects 0.000 description 4
- 238000004088 simulation Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000004227 thermal cracking Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
It is the invention belongs to technical field of civil more particularly to a kind of based on air-cooled mass concrete cooling device, construction method and application.The present invention is to make up the technological deficiency in construction existing for water cooling mass concrete, a kind of brand-new massive concrete temperature cracks Control Technology supplement is provided, at a certain wind speed, cooling wind is mixed into the cooling pipe that inside concrete is made up of high coefficient of thermal conductivity with fog, and carry out heat exchange, the heat constantly assembled in ventilation shaft is endlessly taken out of, reduce concrete internal temperature.Successful Application of the invention in two Practical Projects, realizes zero Crack Control of the invention in Practical Project construction, achieves preferable application effect.
Description
Technical field
Filled the invention belongs to technical field of civil, more particularly to a kind of cooling based on air-cooled mass concrete
Put, construction method and application.
Background technology
With mass concrete Modern Bridge Engineering construction in continuous application so that Bridges in Our Country build gradually to
Long span direction strides forward, and mass concrete has compared with ordinary reinforced concrete structure, and thickness, sectional dimension are big, coagulation
Native consumption is more, and engineering specifications is complicated, good integrity, the features such as construction technical requirement is high.Can release big in course of hardening
Amount the heat of hydration, heat constantly inside works assemble so that works internal temperature is constantly raised, due to surface radiating compared with
Good, concrete surface temperature rise is smaller, and volumetric expansion is also smaller relative to inside, and the difference of this inside and outside expansion can make concrete table
There is crack in face, after coagulation soil temperature peak, temperature drop, and volume contraction, concrete is on uneven temperature change and border
Constraint is lower to produce temperature tension in inside concrete, there is the danger for producing crack, to the globality and durability of structure
Constitute a threat to.
Study more for Volume Concrete Cracks at present, generally using the method control large volume of logical cooling circulating water
The temperature rise of concrete and rate of temperature fall, to reach the purpose that control thermal cracking is produced.Water flowing cools down mass concrete technology
It is more ripe, but the application of the method also has certain limitation, such as：Water resource dependence is strong, waste serious, and pipeline is close
Envelope property requires higher etc..To make up the technological deficiency existing for water flowing cooling mass concrete, carried to large volume coagulation temperature control
For a kind of brand-new technique complementary, on the basis of rational construction technology is taken, live cushion cap is carried out using ventilation shaft big
Volume concrete temperature crack control, has reached good effect.
The content of the invention
The purpose of the present invention be for make up water flowing cooling mass concrete existing for technological deficiency, there is provided one kind is based on
Air-cooled mass concrete cooling device, construction method and application, trip temperature is entered using ventilation shaft to mass concrete
Crack Control.
In order to solve the above technical problems, the technical solution adopted by the present invention is as follows：
It is a kind of based on air-cooled mass concrete cooling device, the cooling device includes what is be made up of blower fan and ventilation shaft
Air cooling mechanism, humidification mechanism and temperature monitoring mechanism, ventilation shaft is through concrete and one end passes through reducing connector and blower fan
Connection, humidification mechanism includes humidity control case, and moisture conveying supervisor, moisture conveying master are provided with the water-mist outlet of humidity control case
Pipe is connected by branch pipe with ventilation shaft, and temperature monitoring mechanism includes several data wires and is arranged inside concrete, upper surface
And the thermometric component in the external world, thermometric component is connected by data wire with Temperature sampler respectively, and signal passes through Wireless Data Transmission
To control terminal.
Preferably, the gas inlet end structure of the ventilation shaft is provided with the gas bleeder valve for inclining 50-70 °, the gas outlet of gas bleeder valve
Set towards blower fan.
Preferably, the heavy caliber end of the reducing connector is connected with the wind pipe of blower fan, small-caliber end and ventilation duct
Road is connected.
Preferably, described ventilation shaft is not less than 200W/m.K by thermal conductivity factor, and wall thickness is not more than the metal tube of 0.6mm
The mutual groove in road is connected and formed, and the pipe that blocks water of 20cm long is arranged on the body of ventilation shaft two ends and concrete junction.
It is a kind of based on air-cooled mass concrete construction method, step is as follows：
1）Pipe arrangement and overall stress are carried out to plan construction building thing first carries out analogue simulation, determines optimal pipeline and temperature
Spend the arrangement of measuring point；Then build the support of building and carry out reinforcing bar colligation, and in the U-shaped positioning of target location colligation
Groove, by ventilation shaft and U-shaped locating slot clamping, manages and ties up while ventilation shaft being stretched out on the body of building and being arranged to block water
Prick；
2）In the embedded concrete measuring temperature component of interior of building, environment thermometric component is set outside building, and is poured in concrete
Build and maintenance coolant-temperature gage thermometric component is set after coagulation upper surface, thermometric component is connected by data wire with the Temperature sampler in the external world
Connect, installation form, and temporary support point is welded in template, yielding rubber pad is placed on temporary support point, blower fan load-bearing is determined
Bit platform and sun-shading rainproof canopy are placed on Shockproof rubber pad, and blower fan and humidification mechanism are fixed respectively, and blower fan is connected by reducing
Fitting is connected with ventilation shaft, and humidification mechanism conveys supervisor by moisture and branch pipe is connected with ventilation shaft；The temporary support
Point will ensure that it is more than 20cm with the vertical spacing for pouring rear top of concrete；Temporary support point can be torn open after the concrete is cured
Remove, and coordinate yielding rubber pad and sun-shading rainproof canopy to be positioned over the concrete surface of hardening blower fan, humidification mechanism；
3）Detection blower fan, humidification mechanism and the fortune of the temperature monitoring mechanism being made up of Temperature sampler, data wire and thermometric component
Row stability, and concreting is carried out to building after stable and concrete mix vibrates, should be kept away when vibrating
Wind pipeline, thermometric component and data wire are opened, while monitoring the operation conditions of ventilation shaft and thermometric component and ensureing that it runs
Stabilization；
4）After the completion of concreting, fixing and being inserted into concrete for the pipe that blocks water is released, in building after concrete final set
Thing top surface water storing conservation, operation blower fan, humidification mechanism, temperature monitoring mechanism, when inside concrete maximum temperature and concrete table
At the 5cm of face temperature difference be 15 DEG C~20 DEG C or inside concrete maximum temperature with template surface temperature-difference be 20 DEG C~25 DEG C or
When template surface is with the environment temperature temperature difference >=15 DEG C, to side of buildings covering and heat insulating layer；
5）During concrete hydrating, control its stage cooling as follows：It is cooled to the overall rate of temperature fall of≤2.0 DEG C/d
Inside concrete maximum temperature is not higher than 40 DEG C and the inner surface temperature difference is not higher than 20 DEG C, and being then shut off blower fan carries out natural cooling；
Carry out finishing analysis according to the data on Temperature sampler, and according to analysis result, the blow rate required, humidification mechanism to blower fan plus
Moisture is adjusted, to meet Concrete Temperature Control the need for, specific control method and the parameter index to be reached it is as follows：
6）After the completion of concrete hydrating, cutting ventilation shaft exposes the body of concrete, and body to inside concrete enters
The treatment of row vacuum grouting.
Preferably, step 5）In, the blower fan is variable speed fan, and the wind speed in ventilation shaft is not less than 10m/s.
Preferably, step 6）In, vacuum grouting is using the low-carbon (LC) portland cement for being not less than 42.5 grades, the glue of cement mortar
Than no more than 0.3,30~50s of fluidity, cubical contraction is less than 1%.
Preferably, the concreting uses one-piece casting, ventilation shaft to use the spacing multilayer stringing of 1~1.2m,
The humidification water consumption of every ventilation shaft is not less than 5L/h.
Described cooling device and described construction method are in science of bridge building temperature cracks control of mass concrete
Using relatively potential difference is larger, concrete structure entity to be particularly well-suited to freshwater resources nervous, operation side and water head site
Longest edge size and most short side dimension ratio are not less than 2 and/or single pours total side's amount no more than 1200m3Large volume coagulation
Soil application work, can also be applied to the construction of tunnel anchorage male cone body, Precast T-Beam, king-tower entablature, sill preparation etc..
The present invention compared with prior art, has the following advantages that：
1）Airduct cooling technology is applied to temperature cracks control of mass concrete in science of bridge building, is large volume coagulation temperature
Control provides a kind of brand-new technique complementary；
2）2, single are not less than to concrete structure entity longest edge size and most short side dimension ratio with air cooling pipeline
Pour total side's amount and be not more than 1200m3Structure carry out the control of thermal cracking, constrained smaller by geographical conditions, water resource according to
Bad property is smaller, and use flexibly is simple to operate；
3）Under certain wind speed and humidification amount, can be made in ventilation shaft constantly from coefficient of heat conduction aluminium alloy pipe higher
The heat of aggregation is endlessly taken out of pipeline, and the effect of concrete internal temperature is reduced so as to reach；
4）Concrete internal temperature, inlet and outlet, environment temperature etc. are changed by intelligent temperature measurement carry out implementation monitoring, and according to
Monitoring result is fed back to site operation in time, realizes dynamic management and control.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of construction method of the present invention；
Fig. 2 is the structural representation of cooling device in specific embodiment.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Embodiment 1
Certain Bridge cushion cap
1）Project profile
Certain bridge total length 848m is seven across the double symmetrical hybrid beam cable-stayed bridges in rope face of double tower.Bridge has 8 auxiliary transition piers to hold
Platform.All cushion caps use C40 maritime concretes, the one-time-concreting shaping of auxiliary transition pier cushion cap.
2）Condition of construction
Auxiliary transition pier cushion cap uses air cooling construction technology of mass concrete work, and primary concreting is constructed, in 2016 5 below the moon
Ten days to early June completes, and site environment temperature is 25 DEG C~35 DEG C, and site operation is in good condition, by long-term after the completion of construction
Observation, concrete does not have crack to produce, and scientific and effective analysis has been carried out to temperature field, and whole work progress has reached expection
Effect.Its successful temperature control measures receives the consistent favorable comment of owner's unit and management with monitoring means.
3）Specific construction method is as follows：
1. pipe arrangement and overall stress are carried out to plan construction building thing first carries out analogue simulation, determines optimal pipeline and temperature
Spend the arrangement of measuring point；Then build the support of building and carry out reinforcing bar colligation, and in the U-shaped positioning of target location colligation
Groove, by ventilation shaft and U-shaped locating slot clamping, manages and ties up while ventilation shaft being stretched out on the body of building and being arranged to block water
Prick；
2. in the embedded concrete measuring temperature component of interior of building, the setting environment thermometric component outside building, and poured in concrete
Build and maintenance coolant-temperature gage thermometric component is set after coagulation upper surface, thermometric component is connected by data wire with the Temperature sampler in the external world
Connect, installation form, and temporary support point is welded in template, yielding rubber pad is placed on temporary support point, blower fan load-bearing is determined
Bit platform and sun-shading rainproof canopy are placed on Shockproof rubber pad, and blower fan and humidification mechanism are fixed respectively, and blower fan is connected by reducing
Fitting is connected with ventilation shaft, and humidification mechanism conveys supervisor by moisture and branch pipe is connected with ventilation shaft；The temporary support
Point will ensure that it is more than 20cm with the vertical spacing for pouring rear top of concrete；Temporary support point can be torn open after the concrete is cured
Remove, and coordinate yielding rubber pad and sun-shading rainproof canopy to be positioned over the concrete surface of hardening blower fan, humidification mechanism；
In the present embodiment, concreting uses one-piece casting, every ventilation shaft to be connected with a Fans, has per Fans
Independent control power controling box, and the protection devices such as earth leakage protective and voltage-stablizer are installed.
Thermometric component arrangement should be able to it is comprehensive and accurate reflection mass concrete temperature situation of change, with cushion cap center
Line takes its section of extraneous windward side 1/4 for temperature monitoring represents face to divide and setting up X-Y-Z coordinates：In cushion cap centre axis Z to
Lay 5 thermometric components altogether, respectively away from position at the 5cm of ground, at the 1m of ground position, central spot position, away from top surface 1m
Place position and the position at top surface 5cm；Plane Location axially respectively lays 5 measuring points along x, y half respectively in cushion cap, is outside template
Position at surface, at template inner surface 5cm position, away from template inner surface 0.5m positions, away from template inner surface 1.5m positions and
Away from template inner surface 3m positions.6 measuring points are laid in the pipeline of cushion cap center, is inlet and outlet position respectively arrangement 1
At interval of 2 meters of layings, one measuring point in measuring point, pipeline.
3. detection blower fan, humidification mechanism and the temperature monitoring mechanism being made up of Temperature sampler, data wire and thermometric component
Operation stability, will blower fan be adjusted to full load, voltage stabilizing three hours, the not timing detection blower fan fortune during whole voltage stabilizing
Whether row stablize, whether there is pipeline loosens, whether there is at pipeline connection port leak out, whether voltage is stablized, whether there is electricity consumption cross-operation etc.
Phenomenon is produced, and to occurring and it can happen that being improved, debug treatment again.
Concreting is carried out to building after stable and concrete mix vibrates：Should avoid leading to when vibrating
Wind pipeline, thermometric component and data wire, vibrating head is inserted perpendicularly into, insert pull out slowly soon, depth of vibrating more than every layer of contact surface 10 ~
20cm, it is ensured that lower floor is once vibrated again before initial set.Point is inserted when vibrating uniform, embark on journey or alternating expression advances, in order to avoid cross to shake
Or leakage is shaken, it is to avoid concrete batching system is caught up with horizontal the dragging of vibrating spear, in order to avoid cause excessive from feed opening distant place mortar and ftracture.
Concrete is poured and plugged and pounded and should avoid blow in cooling pipe and temperature point in concreting process, must not be to pipeline and survey
Point is directly impacted, when due to operational error causes pipeline and measuring point to be impacted when, should in time check pipeline and measuring point
Linearly, line position and steadiness, are modified, consolidation process if necessary.The operation shape of ventilation shaft and thermometric component is monitored simultaneously
Condition simultaneously ensures that its is stable；
4. after the completion of concreting, fixing and being inserted into concrete for the pipe that blocks water is released, in building after concrete final set
Thing top surface water storing conservation, operation blower fan, humidification mechanism, temperature monitoring mechanism, when inside concrete maximum temperature and concrete table
At the 5cm of face temperature difference be 15 DEG C~20 DEG C or inside concrete maximum temperature with template surface temperature-difference be 20 DEG C~25 DEG C or
When template surface is with the environment temperature temperature difference >=15 DEG C, to side of buildings covering and heat insulating layer；
5. during concrete hydrating, control its stage cooling as follows：It is cooled to the overall rate of temperature fall of≤2.0 DEG C/d
Inside concrete maximum temperature is not higher than 40 DEG C and the inner surface temperature difference is not higher than 20 DEG C, and being then shut off blower fan carries out natural cooling；
Carry out finishing analysis according to the data on Temperature sampler, and according to analysis result, the blow rate required, humidification mechanism to blower fan plus
Moisture is adjusted, to meet Concrete Temperature Control the need for, specific control method and the parameter index to be reached it is as follows：
6. after the completion of concrete hydrating, cutting ventilation shaft exposes the body of concrete, and body to inside concrete enters
Row vacuum grouting treatment, vacuum grouting is no more than using the low-carbon (LC) portland cement for being not less than 42.5 grades, the water-cement ratio of cement mortar
0.3,30~50s of fluidity, cubical contraction are less than 1%.
Embodiment 2
Certain bridge main line abutment
1）Project profile
Certain bridge is that main span is single span simply supported steel box girder suspension bridge, and two sides respectively set access bridge, total length 2030m.The present invention is applied
Work relies on abutment, is bridge joining part, and the scale of construction is larger, is molded using C35 concrete one-time-concreting.
2）Condition of construction
Abutment uses air cooling construction technology of mass concrete work, and being constructed to mid-December in by the end of November, 2015 in completes, environment
Temperature is about 8 DEG C~15 DEG C, and site operation is in good condition, and free from flaw is produced, and has obtained the consistent favorable comment of owner and supervisor.
3）Specific construction method is as follows：
1. pipe arrangement and overall stress are carried out to plan construction building thing first carries out analogue simulation, determines optimal pipeline and temperature
Spend the arrangement of measuring point；Then build the support of building and carry out reinforcing bar colligation, and in the U-shaped positioning of target location colligation
Groove, by ventilation shaft and U-shaped locating slot clamping, manages and ties up while ventilation shaft being stretched out on the body of building and being arranged to block water
Prick；
2. in the embedded concrete measuring temperature component of interior of building, the setting environment thermometric component outside building, and poured in concrete
Build and maintenance coolant-temperature gage thermometric component is set after coagulation upper surface, thermometric component is connected by data wire with the Temperature sampler in the external world
Connect, installation form, and temporary support point is welded in template, yielding rubber pad is placed on temporary support point, blower fan load-bearing is determined
Bit platform and sun-shading rainproof canopy are placed on Shockproof rubber pad, and blower fan and humidification mechanism are fixed respectively, and blower fan is connected by reducing
Fitting is connected with ventilation shaft, and humidification mechanism conveys supervisor by moisture and branch pipe is connected with ventilation shaft；The temporary support
Point will ensure that it is more than 20cm with the vertical spacing for pouring rear top of concrete；Temporary support point can be torn open after the concrete is cured
Remove, and coordinate yielding rubber pad and sun-shading rainproof canopy to be positioned over the concrete surface of hardening blower fan, humidification mechanism；
In the present embodiment, concreting uses one-piece casting, every ventilation shaft to be connected with a Fans, has per Fans
Independent control power controling box, and the protection devices such as earth leakage protective and voltage-stablizer are installed.
Thermometric component arrangement should be able to it is comprehensive and accurate reflection mass concrete temperature situation of change, with cushion cap center
Line takes its section of extraneous windward side 1/4 for temperature monitoring represents face to divide and setting up X-Y-Z coordinates：In cushion cap centre axis Z to
Lay 5 thermometric components altogether, respectively away from position at the 5cm of ground, at the 1m of ground position, central spot position, away from top surface 1m
Place position and the position at top surface 5cm；Plane Location axially respectively lays 5 measuring points along x, y half respectively in cushion cap, is outside template
Position at surface, at template inner surface 5cm position, away from template inner surface 0.5m positions, away from template inner surface 1.5m positions and
Away from template inner surface 3m positions.6 measuring points are laid in the pipeline of cushion cap center, is inlet and outlet position respectively arrangement 1
At interval of 2 meters of layings, one measuring point in measuring point, pipeline.
3. detection blower fan, humidification mechanism and the temperature monitoring mechanism being made up of Temperature sampler, data wire and thermometric component
Operation stability, will blower fan be adjusted to full load, voltage stabilizing three hours, the not timing detection blower fan fortune during whole voltage stabilizing
Whether row stablize, whether there is pipeline loosens, whether there is at pipeline connection port leak out, whether voltage is stablized, whether there is electricity consumption cross-operation etc.
Phenomenon is produced, and to occurring and it can happen that being improved, debug treatment again.
Concreting is carried out to building after stable and concrete mix vibrates：Should avoid leading to when vibrating
Wind pipeline, thermometric component and data wire, vibrating head is inserted perpendicularly into, insert pull out slowly soon, depth of vibrating more than every layer of contact surface 10 ~
20cm, it is ensured that lower floor is once vibrated again before initial set.Point is inserted when vibrating uniform, embark on journey or alternating expression advances, in order to avoid cross to shake
Or leakage is shaken, it is to avoid concrete batching system is caught up with horizontal the dragging of vibrating spear, in order to avoid cause excessive from feed opening distant place mortar and ftracture.
Concrete is poured and plugged and pounded and should avoid blow in cooling pipe and temperature point in concreting process, must not be to pipeline and survey
Point is directly impacted, when due to operational error causes pipeline and measuring point to be impacted when, should in time check pipeline and measuring point
Linearly, line position and steadiness, are modified, consolidation process if necessary.The operation shape of ventilation shaft and thermometric component is monitored simultaneously
Condition simultaneously ensures that its is stable；
4. after the completion of concreting, fixing and being inserted into concrete for the pipe that blocks water is released, in building after concrete final set
Thing top surface water storing conservation, operation blower fan, humidification mechanism, temperature monitoring mechanism, when inside concrete maximum temperature and concrete table
At the 5cm of face temperature difference be 15 DEG C~20 DEG C or inside concrete maximum temperature with template surface temperature-difference be 20 DEG C~25 DEG C or
When template surface is with the environment temperature temperature difference >=15 DEG C, to side of buildings covering and heat insulating layer；
5. during concrete hydrating, control its stage cooling as follows：It is cooled to the overall rate of temperature fall of≤2.0 DEG C/d
Inside concrete maximum temperature is not higher than 40 DEG C and the inner surface temperature difference is not higher than 20 DEG C, and being then shut off blower fan carries out natural cooling；
Carry out finishing analysis according to the data on Temperature sampler, and according to analysis result, the blow rate required, humidification mechanism to blower fan plus
Moisture is adjusted, to meet Concrete Temperature Control the need for, specific control method and the parameter index to be reached it is as follows：
6. after the completion of concrete hydrating, cutting ventilation shaft exposes the body of concrete, and body to inside concrete enters
Row vacuum grouting treatment, vacuum grouting is no more than using the low-carbon (LC) portland cement for being not less than 42.5 grades, the water-cement ratio of cement mortar
0.3,30~50s of fluidity, cubical contraction are less than 1%.
Specifically, as shown in Fig. 2 in embodiment 1 and 2, cooling device described in the cooling device of the use is included by wind
Air cooling mechanism, temperature monitoring mechanism and humidification mechanism that machine 21 and ventilation shaft 31 are constituted, ventilation shaft 31 are passed through in concrete 1
And one end is connected by reducing connector 22 with blower fan 21, the heavy caliber end of reducing connector 22 connects with the wind pipe of blower fan 21
Connect, small-caliber end is connected with ventilation shaft 31；Temperature monitoring mechanism include several data wires, the one end of data wire 52 respectively with setting
In the thermometric component 51 in concrete, it is arranged at the environment thermometric component in the external world and is arranged at the maintenance water temperature of concrete upper surface
Degree thermometric component connection, the other end is connected with Temperature sampler 53, and Temperature sampler 53 passes through nothing with the control terminal 56 in the external world
Line data source 54 and wireless data receiver 55 realize that wireless data is connected；Humidification mechanism includes humidity control case 41, wet
Moisture conveying supervisor 42 is provided with the water-mist outlet for spending control cabinet 41, moisture conveying supervisor 42 passes through branch pipe 43 with ventilation shaft 31
Realize that pipeline is connected, the gas inlet end structure of the ventilation shaft 31 is provided with the gas bleeder valve 32 for inclining 60 °, the gas outlet of gas bleeder valve 32
Set towards blower fan 21, ventilation shaft is not less than 200W/m.K by thermal conductivity factor, the metallic conduit that wall thickness is not more than 0.6mm is mutual
Groove is connected and formed, and ventilation shaft two ends in the body of concrete junction to end on be arranged with length be 20cm resistance
Water pipe.
In order to reduce ventilation temperature in ventilation shaft, cooler bin is set outside the intake stack of blower fan, cooler bin is used for
Ice cube is held, can will enter air cooling at air inlet by adding a small amount of mixture of ice and water, effectively control air intake vent temperature.
Claims (9)
1. a kind of based on air-cooled mass concrete cooling device, it is characterised in that the cooling device include by blower fan and
Air cooling mechanism, humidification mechanism and temperature monitoring mechanism that ventilation shaft is constituted, ventilation shaft is through concrete and one end passes through change
Footpath connector is connected with blower fan, and humidification mechanism includes humidity control case, and moisture conveying is provided with the water-mist outlet of humidity control case
Supervisor, moisture conveying supervisor be connected by branch pipe with ventilation shaft, and temperature monitoring mechanism includes several data wires and is arranged at mixed
The thermometric component in solidifying soil inside, upper surface and the external world, thermometric component is connected by data wire with Temperature sampler respectively, and signal leads to
Cross Wireless Data Transmission to control terminal.
2. mass concrete cooling device as claimed in claim 1, it is characterised in that the gas inlet end structure of the ventilation shaft
The gas bleeder valve for inclining 50-70 ° is provided with, the gas outlet of gas bleeder valve is set towards blower fan.
3. mass concrete cooling device as claimed in claim 1, it is characterised in that the heavy caliber end of the reducing connector
It is connected with the wind pipe of blower fan, small-caliber end is connected with ventilation shaft.
4. mass concrete cooling device as claimed in claim 1, it is characterised in that described ventilation shaft is by thermal conductivity factor
It is not less than 200W/m.K, the mutual groove of metallic conduit that wall thickness is not more than 0.6mm is connected and formed, and ventilation shaft two ends and coagulation
The pipe that blocks water of 20cm long is arranged on the body of native junction.
5. it is a kind of based on air-cooled mass concrete construction method, it is characterised in that step is as follows：
1）Build the support of building and carry out reinforcing bar colligation, and in the U-shaped locating slot of target location colligation, by ventilation shaft with
U-shaped locating slot clamping, while ventilation shaft is stretched out on the body of building being arranged block water pipe and colligation；
2）In the embedded concrete measuring temperature component of interior of building, environment thermometric component is set outside building, and is poured in concrete
Build and maintenance coolant-temperature gage thermometric component is set after coagulation upper surface, thermometric component is connected by data wire with the Temperature sampler in the external world
Connect, installation form, and temporary support point is welded in template, yielding rubber pad is placed on temporary support point, blower fan load-bearing is determined
Bit platform and sun-shading rainproof canopy are placed on Shockproof rubber pad, and blower fan and humidification mechanism are fixed respectively, and blower fan is connected by reducing
Fitting is connected with ventilation shaft, and humidification mechanism conveys supervisor by moisture and branch pipe is connected with ventilation shaft；
3）Detection blower fan, humidification mechanism and the fortune of the temperature monitoring mechanism being made up of Temperature sampler, data wire and thermometric component
Row stability, and concreting is carried out to building after stable and concrete mix vibrates, should be kept away when vibrating
Wind pipeline, thermometric component and data wire are opened, while monitoring the operation conditions of ventilation shaft and thermometric component and ensureing that it runs
Stabilization；
4）After the completion of concreting, fixing and being inserted into concrete for the pipe that blocks water is released, in building after concrete final set
Thing top surface water storing conservation, operation blower fan, humidification mechanism, temperature monitoring mechanism, when inside concrete maximum temperature and concrete table
At the 5cm of face temperature difference be 15 DEG C~20 DEG C or inside concrete maximum temperature with template surface temperature-difference be 20 DEG C~25 DEG C or
When template surface is with the environment temperature temperature difference >=15 DEG C, to side of buildings covering and heat insulating layer；
5）During concrete hydrating, control its stage cooling as follows：It is cooled to the overall rate of temperature fall of≤2.0 DEG C/d
Inside concrete maximum temperature is not higher than 40 DEG C and the inner surface temperature difference is not higher than 20 DEG C, and being then shut off blower fan carries out natural cooling；
6）After the completion of concrete hydrating, cutting ventilation shaft exposes the body of concrete, and body to inside concrete enters
The treatment of row vacuum grouting.
6. air-cooled mass concrete construction method is based on as claimed in claim 5, it is characterised in that step 5）In, institute
Blower fan is stated for variable speed fan, the wind speed in ventilation shaft is not less than 10m/s.
7. air-cooled mass concrete construction method is based on as claimed in claim 5, it is characterised in that step 6）In, very
Pneumatics slurry is no more than 0.3,30~50s of fluidity using the low-carbon (LC) portland cement for being not less than 42.5 grades, the water-cement ratio of cement mortar,
Cubical contraction is less than 1%.
8. air-cooled mass concrete construction method is based on as claimed in claim 5, it is characterised in that the concrete is poured
Build and use one-piece casting, ventilation shaft uses the spacing multilayer stringing of 1~1.2m, the humidification water consumption of every ventilation shaft is not low
In 5L/h.
9. the construction method described in cooling device described in claim 1-4 and claim 5-8 is in mass concrete temperature
Application in Crack Control.
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| CN107447670A (en) * | 2017-08-28 | 2017-12-08 | 南昌大学 | Cable-stayed bridge mass concrete box beam weight concrete structure and construction method |
| CN108071173A (en) * | 2017-12-24 | 2018-05-25 | 胡晓霞 | A kind of construction method of mass concrete |
| CN109372263A (en) * | 2018-10-25 | 2019-02-22 | 长江水利委员会长江科学院 | It is a kind of for mass concrete internal cooling and the curing means and method of humidification |
| CN109440771A (en) * | 2018-12-26 | 2019-03-08 | 首钢水城钢铁(集团)赛德建设有限公司 | A kind of solution large volume mixed mud temperature difference leads to the construction technology in crack |
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| CN110847618A (en) * | 2019-10-23 | 2020-02-28 | 同济大学 | Large-volume concrete space three-dimensional mixed cooling system |
| CN111007898A (en) * | 2019-12-12 | 2020-04-14 | 浙江鸿翔建设集团股份有限公司 | Temperature detection control system for large-volume concrete pouring |
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| CN107447670A (en) * | 2017-08-28 | 2017-12-08 | 南昌大学 | Cable-stayed bridge mass concrete box beam weight concrete structure and construction method |
| CN108071173B (en) * | 2017-12-24 | 2021-10-22 | 中国人民解放军陆军勤务学院 | Construction method of mass concrete |
| CN108071173A (en) * | 2017-12-24 | 2018-05-25 | 胡晓霞 | A kind of construction method of mass concrete |
| CN109372263A (en) * | 2018-10-25 | 2019-02-22 | 长江水利委员会长江科学院 | It is a kind of for mass concrete internal cooling and the curing means and method of humidification |
| CN109440771A (en) * | 2018-12-26 | 2019-03-08 | 首钢水城钢铁(集团)赛德建设有限公司 | A kind of solution large volume mixed mud temperature difference leads to the construction technology in crack |
| CN109778860A (en) * | 2019-03-18 | 2019-05-21 | 长江水利委员会长江科学院 | A kind of mass concrete cooling moisture-retaining grouting integrated apparatus and method |
| CN110524715A (en) * | 2019-08-12 | 2019-12-03 | 浙江大学城市学院 | Ventilation type immersed tube pipeline section condenses pipe device and construction method |
| CN110629759A (en) * | 2019-09-16 | 2019-12-31 | 中国化学工程第六建设有限公司 | Method for reducing internal and external temperature difference during winter construction of mass concrete foundation |
| CN110847618A (en) * | 2019-10-23 | 2020-02-28 | 同济大学 | Large-volume concrete space three-dimensional mixed cooling system |
| CN111007898A (en) * | 2019-12-12 | 2020-04-14 | 浙江鸿翔建设集团股份有限公司 | Temperature detection control system for large-volume concrete pouring |
| WO2022028451A1 (en) * | 2020-08-06 | 2022-02-10 | 上海核工程研究设计院有限公司 | Nuclear power plant nuclear island base slab, manufacturing method therefor, and nuclear power plant nuclear island |
| CN113386242A (en) * | 2021-06-08 | 2021-09-14 | 华恒建设集团有限公司 | Special-shaped concrete line mold and construction process thereof |
| CN114319115A (en) * | 2021-12-23 | 2022-04-12 | 上海先行建设监理有限公司 | Maintenance device and method for large-volume concrete foundation of bridge |
| CN114319115B (en) * | 2021-12-23 | 2024-02-27 | 上海先行建设监理有限公司 | Maintenance device and method for bridge mass concrete foundation |
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