CN105200920A - Concrete construction technology in high-pier non-bracket turnover formwork construction - Google Patents
Concrete construction technology in high-pier non-bracket turnover formwork construction Download PDFInfo
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- CN105200920A CN105200920A CN201410233672.7A CN201410233672A CN105200920A CN 105200920 A CN105200920 A CN 105200920A CN 201410233672 A CN201410233672 A CN 201410233672A CN 105200920 A CN105200920 A CN 105200920A
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Abstract
The invention discloses a concrete construction technology in high-pier non-bracket turnover formwork construction. The concrete construction technology comprises the steps of 1 concrete raw material preparing; 2 concrete mixing proportion setting; 3 concrete blending; 4 concrete transporting; 5 concrete pouring; 6 first-segment concrete intensity forming; 7 maintaining. According to the concrete construction technology in high-pier non-bracket turnover formwork construction, the significant superiority and scientificity are achieved, and compared with support construction, the advantages that labors and materials are saved, and the speed is high are achieved, and the construction safety coefficients are increased while the good economic benefit is created.
Description
Technical field
The invention belongs to building field, particularly relate to a kind of high pier without the concrete construction process in support over-form construction.
Background technology
The western Expressway Development of China is swift and violent in recent years, and highway construction starts to extend to mountain area, and these regional mountain shapes are precipitous, and the discrepancy in elevation is very large, and narrow space, makes to adopt high pier structure in a large number in bridge construction.Conventional rack construction need set up a large amount of scaffolds, and the not only human and material resources of at substantial, and complex procedures, progress are slow, safety factor is low.
Summary of the invention
The object of this invention is to provide a kind of high pier without the concrete construction process in support over-form construction, solve the problems of the prior art.
For achieving the above object, the present invention is by the following technical solutions:
High pier, without the concrete construction process in support over-form construction, comprises steps A: concrete material, step B: concrete ratio, step C: the mix of concrete, step D: concrete transports, step e: concrete is poured into a mould, step F: first segment concrete strength and step G: maintenance.
Steps A: concrete material, the quality of every raw material that mixing concrete uses and mixture, through inspection, meets the regulation of existing " highway engineering cement concrete testing regulation " (JTJ053).
Step B: concrete ratio, concrete ratio by quality ratio, by design and examination is joined selected; The actual material adopted of construction, the concrete mixture of mixing should meet the execution conditions such as workability, rate of set, and the concrete made meets the quality requirement such as intensity, durability (frost resistance, impervious, anti-erosion).
Step C: the mix of concrete, concrete mix adopts forced mixer, and the mixture mixed should be even, solid colour, must not have segregation and excreting water phenomenon; In discharge process, from unload stream 1/4 to 3/4 between position, take sample, test, ensure that the relative error of slurry density twice measured value is not more than 0.8% in concrete, in unit volume concrete, coarse aggregate content twice measured value relative error is not more than 5%; Concrete mixture must not more than 15min to entering the mould time from lorry mounted mixer discharging.
Step D: concrete transports, concrete transport capacity should adapt to the needs of concrete condensation and poring rate, still keeps the slump of uniformity and regulation when making cast work uninterrupted and make concrete transport to cast place.
Step e: concrete is poured into a mould, if concrete transport reinforcing bar and template find it is qualified on inspection, then can arrange pouring concrete chute between inner and outer template, what concrete conveying adopted is semi-automatic hopper, sends into mould by chute or artificial shovel; Concrete adopts horizontal slice perfusion, vibrates with spud vibrator, and use internal vibration rod to insert soon and pull out slowly, slotting point is evenly distributed, and pointwise is moved, and order is carried out, and moving interval must not exceed 1.5 times of the operating radius that vibrates; Relevant personnel will be had to carry out observation at any time when building concrete, whether all work well, and in the event of any problem, will carry out process in time and complete before the concrete initial set of having built.
Step F: first segment concrete strength, when first segment concrete strength is more than 10Mpa, dabbing cleaning top of concrete, then carry out next joint pier construction.
Step G: maintenance, after often saving concrete form removal, should wrap up geotextiles in time and prevent new fluid concrete to be exposed to the sun under the sun, and watering keeps concrete surface moistening.Curing time is 7-10 days.
Beneficial effect of the present invention: the high pier that the present invention adopts has significant superiority and science without in the concrete construction process in support over-form construction, compared with rack construction, there is saving of labor, material-saving, fireballing advantage, while creating good economic benefit, turn improve construction safety coefficient.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
High pier, without the concrete construction process in support over-form construction, comprises steps A: concrete material, step B: concrete ratio, step C: the mix of concrete, step D: concrete transports, step e: concrete is poured into a mould, step F: first segment concrete strength and step G: maintenance.
Steps A: concrete material, the quality of every raw material that mixing concrete uses and mixture, through inspection, meets the regulation of existing " highway engineering cement concrete testing regulation " (JTJ053).
Step B: concrete ratio, concrete ratio by quality ratio, by design and examination is joined selected; The actual material adopted of construction, the concrete mixture of mixing should meet the execution conditions such as workability, rate of set, and the concrete made meets the quality requirement such as intensity, durability (frost resistance, impervious, anti-erosion).
Step C: the mix of concrete, concrete mix adopts forced mixer, and the mixture mixed should be even, solid colour, must not have segregation and excreting water phenomenon; In discharge process, from unload stream 1/4 to 3/4 between position, take sample, test, ensure that the relative error of slurry density twice measured value is not more than 0.8% in concrete, in unit volume concrete, coarse aggregate content twice measured value relative error is not more than 5%; Concrete mixture must not more than 15min to entering the mould time from lorry mounted mixer discharging.
Step D: concrete transports, concrete transport capacity should adapt to the needs of concrete condensation and poring rate, still keeps the slump of uniformity and regulation when making cast work uninterrupted and make concrete transport to cast place.
Step e: concrete is poured into a mould, if concrete transport reinforcing bar and template find it is qualified on inspection, then can arrange pouring concrete chute between inner and outer template, what concrete conveying adopted is semi-automatic hopper, sends into mould by chute or artificial shovel; Concrete adopts horizontal slice perfusion, vibrates with spud vibrator, and use internal vibration rod to insert soon and pull out slowly, slotting point is evenly distributed, and pointwise is moved, and order is carried out, and moving interval must not exceed 1.5 times of the operating radius that vibrates; Relevant personnel will be had to carry out observation at any time when building concrete, whether all work well, and in the event of any problem, will carry out process in time and complete before the concrete initial set of having built.
Step F: first segment concrete strength, when first segment concrete strength is more than 10Mpa, dabbing cleaning top of concrete, then carry out next joint pier construction.
Step G: maintenance, after often saving concrete form removal, should wrap up geotextiles in time and prevent new fluid concrete to be exposed to the sun under the sun, and watering keeps concrete surface moistening.Curing time is 7-10 days.
The specific embodiment of the present invention is described although above-mentioned in conjunction with the embodiments; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various amendment or distortion that performing creative labour can make still within protection scope of the present invention.
Claims (8)
1. high pier is without the concrete construction process in support over-form construction, it is characterized in that: comprise steps A: concrete material, step B: concrete ratio, step C: the mix of concrete, step D: concrete transports, step e: concrete is poured into a mould, step F: first segment concrete strength and step G: maintenance.
2. high pier according to claim 1 is without the concrete construction process in support over-form construction, it is characterized in that: steps A: concrete material, the quality of every raw material that mixing concrete uses and mixture, through inspection, meets the regulation of existing " highway engineering cement concrete testing regulation " JTJ053.
3. high pier according to claim 1 is without the concrete construction process in support over-form construction, it is characterized in that: step B: concrete ratio, concrete ratio by quality ratio, by design and examination is joined selected; The actual material adopted of construction, the concrete mixture of mixing should meet the execution conditions such as workability, rate of set, and the concrete made meets intensity, durability, frost resistance, impervious, anti-erosion quality requirement.
4. high pier according to claim 1 is without the concrete construction process in support over-form construction, it is characterized in that: step C: the mix of concrete, concrete mix adopts forced mixer, and the mixture mixed should be even, solid colour, must not have segregation and excreting water phenomenon; In discharge process, from unload stream 1/4 to 3/4 between position, take sample, test, ensure that the relative error of slurry density twice measured value is not more than 0.8% in concrete, in unit volume concrete, coarse aggregate content twice measured value relative error is not more than 5%; Concrete mixture must not more than 15min to entering the mould time from lorry mounted mixer discharging.
5. high pier according to claim 1 is without the concrete construction process in support over-form construction, it is characterized in that: step D: concrete transports, concrete transport capacity should adapt to the needs of concrete condensation and poring rate, still keeps the slump of uniformity and regulation when making cast work uninterrupted and make concrete transport to cast place.
6. high pier according to claim 1 is without the concrete construction process in support over-form construction, it is characterized in that: step e: concrete is poured into a mould, if concrete transport reinforcing bar and template find it is qualified on inspection, then can pouring concrete chute be set between inner and outer template, what concrete conveying adopted is semi-automatic hopper, sends into mould by chute or artificial shovel; Concrete adopts horizontal slice perfusion, vibrates with spud vibrator, and use internal vibration rod to insert soon and pull out slowly, slotting point is evenly distributed, and pointwise is moved, and order is carried out, and moving interval must not exceed 1.5 times of the operating radius that vibrates; Relevant personnel will be had to carry out observation at any time when building concrete, whether all work well, and in the event of any problem, will carry out process in time and complete before the concrete initial set of having built.
7. high pier according to claim 1 is without the concrete construction process in support over-form construction, it is characterized in that: step F: first segment concrete strength, when first segment concrete strength is more than 10Mpa, dabbing cleaning top of concrete, then carry out next joint pier construction.
8. high pier according to claim 1 is without the concrete construction process in support over-form construction, it is characterized in that: step G: maintenance, after often saving concrete form removal, should wrap up geotextiles in time prevents new fluid concrete to be exposed to the sun under the sun, and watering keeps concrete surface moistening, curing time is 7-10 days.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410233672.7A CN105200920A (en) | 2014-05-30 | 2014-05-30 | Concrete construction technology in high-pier non-bracket turnover formwork construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410233672.7A CN105200920A (en) | 2014-05-30 | 2014-05-30 | Concrete construction technology in high-pier non-bracket turnover formwork construction |
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| Publication Number | Publication Date |
|---|---|
| CN105200920A true CN105200920A (en) | 2015-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410233672.7A Pending CN105200920A (en) | 2014-05-30 | 2014-05-30 | Concrete construction technology in high-pier non-bracket turnover formwork construction |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107366230A (en) * | 2017-07-19 | 2017-11-21 | 中国冶集团有限公司 | A kind of bridge pier column rollover board and construction method |
-
2014
- 2014-05-30 CN CN201410233672.7A patent/CN105200920A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107366230A (en) * | 2017-07-19 | 2017-11-21 | 中国冶集团有限公司 | A kind of bridge pier column rollover board and construction method |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151230 |
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| WD01 | Invention patent application deemed withdrawn after publication |