CN106193084A - The pouring structure of concrete bearing platform and casting method - Google Patents
The pouring structure of concrete bearing platform and casting method Download PDFInfo
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- CN106193084A CN106193084A CN201610792685.7A CN201610792685A CN106193084A CN 106193084 A CN106193084 A CN 106193084A CN 201610792685 A CN201610792685 A CN 201610792685A CN 106193084 A CN106193084 A CN 106193084A
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- steel reinforcement
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- concrete
- bearing platform
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
- E02D27/14—Pile framings, i.e. piles assembled to form the substructure
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- 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
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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)
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- Civil Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention provides pouring structure and the casting method of a kind of concrete bearing platform, this pouring structure includes framework of steel reinforcement, multilamellar cooling tube it is provided with in described framework of steel reinforcement, multilamellar temperature control element it is provided with in described framework of steel reinforcement, described temperature control element is arranged at the half position of described framework of steel reinforcement planar structure, for instructing other half to carry out temperature-control construction, described framework of steel reinforcement forms concrete bearing platform by concreting；This casting method includes: digs foundation ditch pile crown and abolishes cushion construction and install framework of steel reinforcement and install multilamellar cooling tube on framework of steel reinforcement and framework of steel reinforcement is poured by temperature control element concrete at twice；The pouring structure of above-mentioned concrete bearing platform and casting method can control thermal cracking, it is ensured that concrete construction quality.
Description
Technical field
The present invention relates to technical field of bridge construction, especially relate to pouring structure and the side of pouring of a kind of concrete bearing platform
Method.
Background technology
In the concreting process of framework of steel reinforcement, often occur the problem that
1, the concrete component scale of construction is big, and the heat of hydration is concentrated, and need to strengthen temperature control measures and detection method, it is to avoid inside measures greatly
Existing crack, thus affect the durability of structure；
2, construction month temperature is relatively low, day and night temperature is bigger, windy, environment is more severe, concrete internal temperature and ring
Border temperature gap is difficult to ensure that, concrete occurs that the risk in crack is bigger.
Cause producing inside framework of steel reinforcement crack for avoiding inside concrete hydration heat temperature too high, determine in height side
To being divided into two-step pouring, for guaranteeing construction quality, it is incubated outside the cushion cap of formation pouring for the first time and for the second time, right
Cool down inside cushion cap, successfully solve the problems referred to above.
Summary of the invention
It is an object of the invention to provide pouring structure and the casting method of concrete bearing platform, to solve prior art is deposited
, owing to the concrete component scale of construction is big, the heat of hydration is concentrated, and need to strengthen temperature control measures and detection method, it is to avoid inside measures greatly
Existing crack, thus affect the durability of structure；Month temperature is relatively low, day and night temperature is bigger in construction, windy, environment is more severe,
Concrete internal temperature is difficult to ensure that with ambient temperature difference, and the technical problem that the risk in crack is bigger occurs in concrete.
The pouring structure of the concrete bearing platform that the present invention provides, this pouring structure includes framework of steel reinforcement；
It is provided with equidistantly and is mutually perpendicular to the multilamellar cooling tube of distribution in described framework of steel reinforcement；
Being provided with multilamellar temperature control element in described framework of steel reinforcement, described temperature control element is arranged at described framework of steel reinforcement plane
The half position of structure, is used for instructing other half to carry out temperature-control construction；
Described framework of steel reinforcement forms concrete bearing platform by concreting.
Further, described framework of steel reinforcement is I shape framework of steel reinforcement.
Further, described I shape framework of steel reinforcement includes side framework of steel reinforcement and the vertical connection two being arranged on two ends
The middle binder of side framework of steel reinforcement.
Further, described cooling tube is set to five layers, and multiple vertical spacing of described cooling tube and level interval equal
For 1m.
Further, described temperature control element is set to seven layers.
Further, be positioned at four layers of temperature control element of bottom distance away from framework of steel reinforcement bottom surface be followed successively by 5cm, 150cm,
250cm, 345cm, be positioned at three layers of temperature control element on framework of steel reinforcement top distance away from framework of steel reinforcement end face be followed successively by 5cm, 50cm,
150cm。
Further, described temperature control element is temperature sensor.
A kind of casting method of the pouring structure applying one of them described concrete bearing platform above-mentioned, this casting method bag
Include following steps:
1) foundation ditch is dug；
2) pile crown is abolished；
3) cushion construction；
4) framework of steel reinforcement is installed；
5) multilamellar cooling tube and temperature control element are installed on framework of steel reinforcement；
6) framework of steel reinforcement is poured by concrete at twice；
61) framework of steel reinforcement is carried out concreting for the first time；It is incubated outside the cushion cap of formation pouring for the first time,
Cushion cap inside is cooled down；Form removal, surrounding backfill；
62) framework of steel reinforcement is carried out second time concreting；Second time is poured and is incubated outside the cushion cap of formation,
Cushion cap inside is cooled down；Form removal, surrounding backfill；Complete to pour operation.
Further, to the method being incubated outside described framework of steel reinforcement: use tarpaulin to set up outside framework of steel reinforcement
Roof insulating, it is to avoid affected by strong wind weather in construction, arranges stove and guarantees ambient temperature in roof insulating；
Method to cooling down inside described framework of steel reinforcement: set cooling tube in framework of steel reinforcement, in order to reduce internal water
Heat-transformation, it is ensured that the table temperature difference in concrete.
Further, the mix of described concrete, way of transportation: use two blenders, four automotive pump, one standby
Automotive pump pours, and 30 concrete concrete tank transports, sand and rubble storage level are sufficient, without interruption to guarantee.
The pouring structure of the concrete bearing platform that the present invention provides, has the advantage that the effective fracture of the present invention is controlled
System, by setting up cooling tube and temperature control element and the internal cooling to cushion cap, external insulation (calls fall in outer guarantor in the following text) so that hold
Platform surface and internal temperature differential, less than 25 DEG C, prevent crack.The present invention is for guaranteeing construction quality, and cushion cap is taked " to protect outward
Interior fall " temperature control principle, i.e. outside cushion cap use tarpaulin set up roof insulating, it is to avoid construction is affected by strong wind weather, protect
In temperature canopy, stove is set and guarantees ambient temperature, in cushion cap, set cooling water pipe, in order to reduce internal water heat-transformation, it is ensured that table in cushion cap
The temperature difference.The present invention uses comprehensive technical measures such as " falls in outer guarantor ", and prevention structural cracks is served obvious effect.
Accompanying drawing explanation
In order to be illustrated more clearly that the specific embodiment of the invention or technical scheme of the prior art, below will be to specifically
In embodiment or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not paying creative work
Put, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The structure top view of the framework of steel reinforcement that Fig. 1 provides for the present invention；
Fig. 2 is the cooling tube based on Fig. 1 scattergram on framework of steel reinforcement；
Fig. 3 is the temperature control element based on Fig. 1 scattergram on framework of steel reinforcement；
Fig. 4 is for pouring cushion cap external insulation measure schematic diagram for the first time；
Fig. 5 pours cushion cap external insulation measure schematic diagram for second time.
Reference:
10-framework of steel reinforcement；20-the first cushion cap；30-the second cushion cap；
11-cooling tube；12-temperature control element；13-stove；
14-supporting steel pipe；15-heater；16-roof insulating；
161-thin film.
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme is clearly and completely described, it is clear that described enforcement
Example is a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under not making creative work premise, broadly falls into the scope of protection of the invention.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " is installed ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be fixing connection, it is also possible to be to removably connect, or be integrally connected；Can
To be mechanical connection, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, above-mentioned term can be understood as the case may be
Concrete meaning in the present invention.
The structure top view of the framework of steel reinforcement 10 that Fig. 1 provides for the present invention；Fig. 2 is that cooling tube of based on Fig. 1 11 is at reinforcing bar
Scattergram on skeleton 10；Fig. 3 is the temperature control element 12 based on Fig. 1 scattergram on framework of steel reinforcement 10, as Figure 1-3,
The pouring structure of the concrete bearing platform that the present invention provides, this pouring structure includes framework of steel reinforcement 10；Set in above-mentioned framework of steel reinforcement 10
It is equipped with equidistantly and is mutually perpendicular to the multilamellar cooling tube 11 of distribution；It is provided with multilamellar temperature control element 12 in above-mentioned framework of steel reinforcement 10,
Above-mentioned temperature control element 12 is arranged at the half position of above-mentioned framework of steel reinforcement 10 planar structure, is used for instructing other half to carry out temperature
Control construction；Above-mentioned framework of steel reinforcement 10 forms concrete bearing platform by concreting.Further, above-mentioned framework of steel reinforcement 10 is work
Font framework of steel reinforcement.Further, above-mentioned I shape framework of steel reinforcement includes the side framework of steel reinforcement being arranged on two ends and vertically connects
Connect the middle binder of two side frameworks of steel reinforcement.Further, above-mentioned cooling tube 11 is set to five layers, and multiple above-mentioned cooling tube 11
Vertical spacing and level interval are 1m.Specifically, cooling tube 11 uses 48mm × 3.5mm steel pipe, the longest loop to be 140m,
Shortest cycle is 99m, and the water flowing time is for after having poured 12 hours.Cooling water selects river course, cushion cap east side river,
West side, river course sets cistern, uses electrical bar to heat in cistern, it is ensured that cooling water and the concrete temperature difference are less than 20 DEG C.Enter
One step ground, above-mentioned temperature control element 12 is set to seven layers, and every layer arranges 17 temperature control element 12, is positioned at four layers of temperature control element of bottom
12 distances away from framework of steel reinforcement 10 bottom surface are followed successively by 5cm, 150cm, 250cm, 345cm, are positioned at three layers of framework of steel reinforcement 10 top
The temperature control element 12 distance away from framework of steel reinforcement 10 end face is followed successively by 5cm, 50cm, 150cm.Further, above-mentioned temperature control element 12
For temperature sensor.Specifically, temperature control index: after concreting, temperature rise value is not preferably greater than 50 DEG C on the basis of molding temperature,
And inside concrete maximum temperature cannot be greater than 75 DEG C；In concrete, the table temperature difference cannot be greater than 25 DEG C, surface temperature and environment temperature
Degree difference cannot be greater than 20 degree；Water inlet water temperature and concrete temperature difference cannot be greater than 20 DEG C；The upper and lower layer concrete temperature difference is little
In 20 DEG C.
The casting method of the pouring structure applying above-mentioned concrete bearing platform that the embodiment of the present invention provides, this casting method
Comprise the following steps:
1) foundation ditch is dug；
2) pile crown is abolished；
3) cushion construction；
4) framework of steel reinforcement 10 is installed；
5) multilamellar cooling tube 11 and temperature control element 12 are installed on framework of steel reinforcement 10；
6) framework of steel reinforcement 10 is poured by concrete at twice；
Wherein, the mix of concrete, transport: concrete supply business distance building site 4 km, concrete is united at concrete agitation station
One concentrates mix, uses two blenders, four automotive pump, car pool pumps to pour, 30 concrete concrete tank fortune
Defeated, sand and rubble storage level are sufficient, it is ensured that without interruption.During concrete mixing, accredit testing crew and business is mixed station count
Amount system checking, it is ensured that metering system prepares errorless, moment monitoring duration of mixing, out-of-machine temperature, the slump and workability, it is ensured that
That supplies is continuous, stable.Specifically, the casting method of concrete: concrete molding temperature: in order to reduce internal-external temperature difference and basis
The temperature difference, placing temperature is the lowest more favourable, and therefore, concrete out-of-machine temperature in the daytime is advisable at 10-15 DEG C, and nighttime temperature is less than-1 DEG C
Time, mixing water should be heated, it is ensured that concrete out-of-machine temperature is between 15-20 DEG C, and molding temperature is advisable at 8 DEG C-15 DEG C.If
Temperature is the lowest, and before reaching critical intensity, surface concrete has the possibility suffering freeze injury, should strengthen Insulation, can not be single
Pure in order to antifreeze and arbitrarily improve placing temperature, so that causing crack.Pumping mode: use direct pumping mode, whole king-tower
Cushion cap plane is divided into four to pour great Qu carrying out, and a pump truck is responsible for one and is poured great Qu, and starting pushes away to centre by both sides
Enter.Concrete placings uses reciprocal covering of layering to pour mode, and according to pouring ability, the concrete presetting period primarily determines that lift height is
35cm (suitably can thicken according to actual speed of perfusion).At each casting area template periphery cloth at first, it is to avoid at template
Forming inclined-plane causes mortar to assemble, and affects cushion cap concrete cover quality.Layered mode: primarily determine that every layer according to the concrete presetting period
Pouring thickness is 35cm, and interlayer is not more than the concrete presetting period the longest interval time.If the practice of construction concrete presetting period is less than anticipated
Time, the mode of pouring should be adjusted to passage formula continuous placing.Concrete vibrating: according to self-assembling formation during concrete pumping one
The practical situation of the gradient, arranges twice vibrator before and after band each pouring, and first is arranged in concrete discharging opening, mainly
Solve the jolt ramming of top concrete；Owing to bottom layer of the reinforcing steel skeleton 10 spacing is closeer, second is arranged at concrete toe, with really
Protect bottom concrete compaction.Along with the propelling poured, vibrator is caught up with the most accordingly, to guarantee the matter of concrete on whole height
Amount.Concrete vibrates employing hand-held high frequency vibrating tamper, and totally 13 vibrating spears vibrate, and vibrate by code requirement density of vibrating, root
Determining every rod vibrating time according to practical situations such as concrete workability, forbid when vibrating to vibrate template and reinforcing bar, with concrete surface without substantially
Bubble emersion, till the smooth bleeding in surface, stop concrete cross be vibrated away from analysis.The proportion design of concrete: consider the property of concrete
Can and quality be that to be related to works safety, durability one of key.This bridge cushion cap strength grade of concrete is C35, uses
42.5 Portland cements, with 60 days intensity for design normal intensity, use double-doped during mix-design, flyash uses II
The levigate ash of level, breeze uses S75 level, replaces part of cement with flyash and breeze, reaches to reduce cement consumption, reduce aquation
Heat, slow down hydration heat of cement rate of release, improve concrete workability and pumping, the purpose of raising durability.Through trial,
Concrete slump is 180 ± 20mm, and the presetting period is 15h, and final setting time is 20h, both proof strength, meets again construction required
The workability wanted.
61) framework of steel reinforcement 10 is carried out concreting for the first time；Protect outside the cushion cap of formation pouring for the first time
Temperature, cools down cushion cap inside；Form removal, surrounding backfill；
62) framework of steel reinforcement 10 is carried out second time concreting；Second time is poured and protects outside the cushion cap of formation
Temperature, cools down cushion cap inside；Form removal, surrounding backfill；Complete to pour operation.
Fig. 4 is for pouring cushion cap external insulation measure schematic diagram for the first time；Fig. 5 pours cushion cap external insulation measure for second time
Schematic diagram, as illustrated in figures 4-5, the method that be incubated outside to above-mentioned framework of steel reinforcement 10: use paulin outside framework of steel reinforcement 10
Roof insulating 16 set up by cloth, it is to avoid affected by strong wind weather in construction, arranges stove 13 and guarantee ambient temperature in roof insulating 16；Right
The internal method carrying out cooling down of above-mentioned framework of steel reinforcement 10: set cooling tube 11 in framework of steel reinforcement 10, in order to reduce internal water heat-transformation,
Guarantee the table temperature difference in concrete.
Specifically, the heat preserving method to outside framework of steel reinforcement 10: use dual-layer warming shed 16 cushion cap surrounding to be wrapped up,
Use φ 48 × 3.5mm supporting steel pipe that roof insulating 16 is supported, and at the thin film 161 of roof insulating 16 underlay plastics, control
Cushion cap ambient temperature scatters and disappears；Use heater 15 that cushion cap surrounding and top are heated, it is ensured that internal-external temperature difference；Use ten
Stove 13, carries out igniting heating inside roof insulating 16.
As shown in Figure 4, after pouring for the first time, on figure, lower right is the first cushion cap 20, is arranged above framework of steel reinforcement 10, reinforcing bar
Frame 10 uses dry type heating rod to heat, and inner side employing wet type adds heat pipe and heats.Outside roof insulating 16 wraps up, insulation
Having thin film 161 to be incubated further below canopy 16, internal structure uses supporting steel pipe 14 to be supported；As it is shown in figure 5, second
Secondary pour after, on figure, lower right is the first cushion cap 20, is arranged above the second cushion cap 30, the first cushion cap 20 side for backfill the earthwork, return
Earth fill is placed above multiple stove 13, and inner side uses dry type heating rod or wet type to add heat pipe and heat, outside roof insulating
16 parcels, have thin film 161 to be incubated further below roof insulating 16, internal structure uses supporting steel pipe 14 to be supported.
Last it is noted that various embodiments above is only in order to illustrate technical scheme, it is not intended to limit；To the greatest extent
The present invention has been described in detail by pipe with reference to foregoing embodiments, it will be understood by those within the art that: it depends on
So the technical scheme described in foregoing embodiments can be modified, or the most some or all of technical characteristic is entered
Row equivalent；And these amendments or replacement, do not make the essence of appropriate technical solution depart from various embodiments of the present invention technology
The scope of scheme.
Claims (10)
1. the pouring structure of a concrete bearing platform, it is characterised in that include framework of steel reinforcement；
It is provided with equidistantly and is mutually perpendicular to the multilamellar cooling tube of distribution in described framework of steel reinforcement；
Being provided with multilamellar temperature control element in described framework of steel reinforcement, described temperature control element is arranged at described framework of steel reinforcement planar structure
Half position, be used for instructing other half to carry out temperature-control construction；
Described framework of steel reinforcement forms concrete bearing platform by concreting.
The pouring structure of concrete bearing platform the most according to claim 1, it is characterised in that described framework of steel reinforcement is I shape
Framework of steel reinforcement.
The pouring structure of concrete bearing platform the most according to claim 2, it is characterised in that described I shape framework of steel reinforcement bag
Include and be arranged on the side framework of steel reinforcement at two ends and the vertical middle binder connecting two side frameworks of steel reinforcement.
The pouring structure of concrete bearing platform the most according to claim 1, it is characterised in that described cooling tube is set to five
Layer, and multiple vertical spacing of described cooling tube and level interval be 1m.
The pouring structure of concrete bearing platform the most according to claim 1, it is characterised in that described temperature control element is set to seven
Layer.
The pouring structure of concrete bearing platform the most according to claim 5, it is characterised in that be positioned at four layers of temperature control unit of bottom
The part distance away from framework of steel reinforcement bottom surface is followed successively by 5cm, 150cm, 250cm, 345cm, is positioned at three layers of temperature control on framework of steel reinforcement top
The element distance away from framework of steel reinforcement end face is followed successively by 5cm, 50cm, 150cm.
The pouring structure of concrete bearing platform the most according to claim 6, it is characterised in that described temperature control element is that temperature passes
Sensor.
8. application is according to a casting method for the pouring structure of one of them described concrete bearing platform of claim 1-7, its
Being characterised by, this casting method comprises the following steps:
1) foundation ditch is dug；
2) pile crown is abolished；
3) cushion construction；
4) framework of steel reinforcement is installed；
5) multilamellar cooling tube and temperature control element are installed on framework of steel reinforcement；
6) framework of steel reinforcement is poured by concrete at twice；
61) framework of steel reinforcement is carried out concreting for the first time；It is incubated outside the cushion cap of formation, to holding pouring for the first time
Cool down inside platform；Form removal, surrounding backfill；
62) framework of steel reinforcement is carried out second time concreting；Second time is poured and is incubated outside the cushion cap of formation, to holding
Cool down inside platform；Form removal, surrounding backfill；Complete to pour operation.
Casting method the most according to claim 8, it is characterised in that to the side being incubated outside described framework of steel reinforcement
Method: use tarpaulin to set up roof insulating outside framework of steel reinforcement, it is to avoid to be affected by strong wind weather in construction, fire is set in roof insulating
Stove guarantees ambient temperature；
Method to cooling down inside described framework of steel reinforcement: set cooling tube in framework of steel reinforcement, in order to reduce internal water heat-transformation,
Guarantee the table temperature difference in concrete.
Casting method the most according to claim 8, it is characterised in that the mix of described concrete, way of transportation: use
Two blenders, four automotive pump, car pool pumps pour, 30 concrete concrete tanks transports, sand and rubble deposit
Amount abundance, without interruption to guarantee.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610792685.7A CN106193084A (en) | 2016-08-31 | 2016-08-31 | The pouring structure of concrete bearing platform and casting method |
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| CN201610792685.7A CN106193084A (en) | 2016-08-31 | 2016-08-31 | The pouring structure of concrete bearing platform and casting method |
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ID=58085593
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| CN106869032A (en) * | 2017-02-27 | 2017-06-20 | 中铁十九局集团有限公司 | A kind of bridge bearing platform constructing tie beam method |
| CN107816044A (en) * | 2017-10-13 | 2018-03-20 | 武汉市市政建设集团有限公司 | A kind of dumbbell shape structure Concreting of Large Volume Bearing Platform method for controlling crack |
| CN109235270A (en) * | 2018-09-30 | 2019-01-18 | 中交第三航务工程局有限公司 | A kind of main pier bearing platform construction technology |
| CN109811783A (en) * | 2019-03-18 | 2019-05-28 | 重庆城建控股(集团)有限责任公司 | A kind of main pier bearing platform and its construction method |
| CN109895234A (en) * | 2019-04-03 | 2019-06-18 | 中海石油气电集团有限责任公司 | A kind of LNG tank Concrete Temperature Control system and its temperature control method |
| CN112211101A (en) * | 2020-09-29 | 2021-01-12 | 清华大学 | Water supply joint adjusting system for bridge abutment of bridge pier |
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| CN106869032A (en) * | 2017-02-27 | 2017-06-20 | 中铁十九局集团有限公司 | A kind of bridge bearing platform constructing tie beam method |
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| CN109811783A (en) * | 2019-03-18 | 2019-05-28 | 重庆城建控股(集团)有限责任公司 | A kind of main pier bearing platform and its construction method |
| CN109895234A (en) * | 2019-04-03 | 2019-06-18 | 中海石油气电集团有限责任公司 | A kind of LNG tank Concrete Temperature Control system and its temperature control method |
| CN112211101A (en) * | 2020-09-29 | 2021-01-12 | 清华大学 | Water supply joint adjusting system for bridge abutment of bridge pier |
| CN112211101B (en) * | 2020-09-29 | 2022-02-01 | 清华大学 | Water supply joint adjusting system for bridge abutment of bridge pier |
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Application publication date: 20161207 |