CN106639153A - Construction method applied to prestressed concrete column group - Google Patents
Construction method applied to prestressed concrete column group Download PDFInfo
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- CN106639153A CN106639153A CN201610978811.8A CN201610978811A CN106639153A CN 106639153 A CN106639153 A CN 106639153A CN 201610978811 A CN201610978811 A CN 201610978811A CN 106639153 A CN106639153 A CN 106639153A
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- concrete
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/34—Columns; Pillars; Struts of concrete other stone-like material, with or without permanent form elements, with or without internal or external reinforcement, e.g. metal coverings
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- Engineering & Computer Science (AREA)
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention discloses a construction method applied to a prestressed concrete column group. The construction method comprises the steps that self-compacting concrete with an early strength property is adopted, mutual interference of an intensive reinforcing bar and a pre-embedded corrugated pipe is avoided in the pouring process and structure, and meanwhile, the concrete strength can meet the post-tensioning method construction requirement in a short time; a reasonable pouring method and a vibrating mode are adopted, the vibrating time is controlled, and the concrete pouring quality is guaranteed; a set-shaped steel formwork and a mortar leakage control measure are adopted, the appearance quality of pouring is guaranteed, circulation turnover of the formwork can be accelerated, and the set-shaped steel formwork and the mortar leakage control measure are used with the self-compacting concrete together, so that the construction period of the whole column group is shortened; sufficient maintenance time and reasonable maintenance measures are guaranteed, the situation that cracks occur on the outer surface of a prestressed column is controlled, and secondary destruction of post-tensioning method construction on the structure is avoided. The adverse factor of longer whole construction period of the prestressed concrete column group is overcome.
Description
Technical field
The invention belongs to the science and technology in Construction of Civil Engineering field, devises a kind of construction method of prestressed column, especially
It is a kind of construction method for being applied to heavy in section prestressed concrete column group.
Background technology
Post-tensioned prestressed daraf(reciprocal of farad) construction is generally used for large span beam body, requires that beam body concrete strength is big during practice of construction
Can implement when 90%.Due to beam body level, for normal concrete, operation side it is big and depth is limited can be direct
Pour. meanwhile, either bridge is still built, the quantity often limited (1-2 roots) of long-span beams.Therefore, wait strong concrete
Degree meets the time of post- tension construction for the total lever factor of total, is negligible.
But, but there is very big difference in prestressed column group.First, as the support of structure, the quantity of prestressed column group
Often there is as many as dozens of;Second, concreting must downwards be poured from post mouth, for non-prestressed post, its structure
Simply, there is no the impact of intensive reinforcing bar and bellows to concreting, but for prestressed column, then difficulty is more,
Structure is mutually restricted with pouring construction;3rd, the area of section of pillar is larger, belongs to casting of concrete in mass, thermal cracking
The probability of presence is higher, but pouring quality requirement of the post-tensioned prestressed tension method to concrete is high, otherwise there will be larger
Structural hidden danger. to sum up, prestressed concrete column group to construct quality, construction period it is high. therefore, it is architectural often seldom to adopt
It is designed with this theory of prestressed column group.
The content of the invention
The invention aims to solve deficiency of the prior art, there is provided a kind of heavy in section prestressed concrete column group
Construction method, according to this construction method, can circulate in high quality within a short period of time complete dozens of heavy in section prestressing force mix
Solidifying earth pillar, meets the construction requirement of post-tensioned prestressed daraf(reciprocal of farad), and efficiency of construction is greatly improved, and shortens construction period, while increasing
Construction benefit.
In order to achieve the above object, the technical solution used in the present invention is as follows,
(1) according to the requirement of construction drawing, the reinforcing bar of colligation flowing water batch first batch prestressed column；
(2) according to construction drawing and flowing water batch, from corresponding sizing punching block；
(3) normal concrete is replaced using self-compacting concrete, is poured；
(4) while the first wheel post group pours self-compacting concrete, the second round post group starts reinforcing bar colligation, bellows peace
Dress, SSC has been poured second day, and steel form is just detachable, circulates to the second round；First round SSC has poured the 3rd day, and second
Wheel reinforcing bar colligation, bellows are installed, and punching block starts formwork, and after three rounds terminate, the first round post group can carry out pre- answering
Power post- tension is constructed；
(5) after steel form dismounting, to prestressed column overlay film, water seasoning, proceed by after having poured 10 days post-tensioned prestressed
Daraf(reciprocal of farad) is constructed, but maintenance still can not stop, until having poured 2 more than week；
(6) further improvement of the present invention is：From self-compacting concrete there is early epistasis matter, pouring 10 days or so
Time, intensity reaches the 90% of design standard, meets the construction requirement of post-tensioned prestressed daraf(reciprocal of farad).
Further improvement of the present invention is：Constructed using set shaped steel formwork, be used in conjunction with self-compacting concrete, can ensure to pour
The circulation of middle template is built, it is quick to utilize, the overall duration can be shortened.
Further improvement of the present invention is：At steel form seam and bolt hole, sealed with glass cement, prevented from density coagulation
Native spillage, it is ensured that pour presentation quality and column body concrete is full, uniform.
Further improvement of the present invention is：In the casting process of self-compacting concrete, increase auxiliary operation：
1. drainage of vibrating is carried out for reinforcing bar Dense nodes, time control is within 8s；
2. bucket will be altered and will be placed in post inner side, uniformly be poured；After pouring into 50-70cm concrete, vibrating head is inserted, then pour into coagulation
While native, vibrating head slightly vibrates 5-8s, discharges gas in concrete；Thereafter 50-70cm concrete is poured again, and circulation is made
Industry；After cylinder is filled, vibrating head following 50-80cm to cylinder is made, while draw out shaking so that the bubble row of column body concrete
Remove.
Further improvement of the present invention is：Prestressed column section is larger, casting of concrete in mass need to take effectively,
Long-time maintenance measure, to control thermal cracking, meets the quality requirement of next stage post-tensioned prestressed daraf(reciprocal of farad) construction, avoids to knot
The secondary destruction of structure.
Beneficial effect：
Using sizing steel plate formwork, pouring quality can be ensured, its formwork and dismounting are convenient, survivable, can accelerate template
Circulation, circulation rate；Steel form seam and screw socket are sealed with glass cement, prevent dew slurry；Using mixed with early epistasis matter self-compaction
Solidifying soil substitutes traditional normal concrete, and the self-compacting concrete not only has certain mobility, with knot when can avoid pouring
Structure is interfered；And 10 days intensity is the 90% of design strength, post-tensioned prestressed daraf(reciprocal of farad) construction is met；In the first wheel post group
While pouring SSC, the reinforcing bar colligation of the second round prestressed concrete column can be simultaneously carried out, the installation of bellows, SSC is poured
Complete second day, steel form was just detachable；Pour the 3rd day, the reinforcing bar of the second wheel prestressed concrete column, bellows are completed
The installation of steel form can be carried out, recycling for steel form is according to said method capable of achieving, time to wait is reduced.
The present invention can in high quality be circulated within a short period of time and complete dozens of heavy in section prestressed concrete column, meet pre-
The construction requirement of stress post- tension, efficiency of construction is greatly improved, and shortens construction period, while increased construction benefit.
Specific embodiment
Below in conjunction with the specific embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Ground description, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.
For the newly-built large-scale airplane exhibition pipe in the country（Prestressed column 15 meters of pillar height of maximum, there is 1500mm*1500mm in section,
Tri- kinds of specifications of 1400mm*1400mm, 1400mm*1200mm, totally 72）Complex structure, workload are huge, propose a kind of big section
The construction method of face prestressed column group, not only ensure that the construction quality of structure, and effectively increase efficiency of construction, shorten work
Phase.
Embodiment 1：
（1）According to the requirement of construction drawing, the reinforcing bar of colligation flowing water batch first batch prestressed column.
(2) according to construction drawing and flowing water batch, from corresponding sizing punching block. sizing punching block is torn open and is propped up, and can shorten stream
The water turnaround time, while ensureing the presentation quality for pouring.
(3) in order to prevent concrete spillage, at punching block seam crossing and stud hole, sealed with glass cement.
(4) for structure reinforcing bars are intensive, bellows and concreting mutually restricts etc. and to affect final concreting matter
The problem of amount, using self-compacting concrete normal concrete is replaced, and is poured. and the self-compacting concrete of selection has early epistasis
Matter, intensity reaches the 90% of design standard after having poured 10, meets the requirement of post- tension construction.
(5) in the casting process of self-compacting concrete, auxiliary operation is increased, the pouring quality overall to improve SSC,
Drainage of vibrating is carried out for reinforcing bar Dense nodes, time control is within 8s:
1. bucket will be altered and will be placed in post inner side, uniformly be poured；
2. after pouring into 50-70cm concrete, vibrating head is inserted, then during penetration concrete, vibrating head slightly vibrates 5-8s, row
Go out gas in concrete；Thereafter 50-70cm concrete, cycle operation are poured again；
3. after cylinder is filled, vibrating head following 50-80cm to cylinder is made, while draw out shaking so that the bubble of column body concrete
Exclude.
By the method, self-compacting concrete can be splendid full of overall cylinder, total quality.
(6) while the first wheel post group pours self-compacting concrete, the second round post group starts reinforcing bar colligation, bellows
Install, SSC has been poured second day, steel form is just detachable, circulates to the second round；First round SSC has been poured the 3rd day, the
Two wheel reinforcing bar colligations, bellows are installed, and punching block starts formwork, and after three rounds terminate, the first round post group can carry out pre-
Stress post- tension is constructed.
(7) because for casting of concrete in mass, its aquation thermal endurance is longer, remove outer in steel form, prestressing force
Post still needs to overlay film, water seasoning.Although proceeding by post-tensioned prestressed daraf(reciprocal of farad) construction after having poured 10 days, maintenance still can not stop
Only, until having poured 2 more than week.
(8) after post- tension construction, most possibly there is crack location to cylinder and be monitored, detective distance cylinder 1m
In addition, cap has no always crack with lower prestress bending section.
Above-mentioned specific embodiment, only technology design to illustrate the invention and architectural feature, it is therefore intended that allow and be familiar with this
The stakeholder of item technology can implement according to this, but above content is not intended to limit protection scope of the present invention, every according to this
Any equivalence changes or modification that bright Spirit Essence is made, all should fall under the scope of the present invention.
Claims (5)
1. a kind of construction method for being applied to prestressed concrete column group, it is characterised in that：
(1) according to the requirement of construction drawing, the reinforcing bar of colligation flowing water batch first batch prestressed column；
(2) according to construction drawing and flowing water batch, from corresponding sizing punching block；
(3) at punching block seam crossing and stud hole, sealed with glass cement；
(4) normal concrete is replaced using self-compacting concrete, is poured；
(5) in the casting process of self-compacting concrete, auxiliary operation is increased, to ensure that self-compacting concrete is full of integral post
Body；
（6）Post group's reinforcing bar colligation, prestressing force bellows are installed, and steel form formwork and self-compacting concrete adopt cycle operation；
(7) after steel form dismounting, to prestressed column overlay film, water seasoning, proceed by after having poured 10 days post-tensioned prestressed
Daraf(reciprocal of farad) is constructed, but maintenance still can not stop, until having poured 2 more than week.
2. a kind of construction method for being applied to prestressed concrete column group according to claim 1, it is characterised in that：It is described
From self-compacting concrete there is early epistasis matter, intensity can reach design standard 90% within 10 days.
3. a kind of construction method for being applied to prestressed concrete column group according to claim 1, it is characterised in that：From close
The auxiliary operation of degree concreting process includes：
1. drainage of vibrating is carried out for reinforcing bar Dense nodes, time control is within 8s；
2. bucket will be altered and will be placed in post inner side, after pouring into 50-70cm concrete, vibrating head be inserted, then while penetration concrete,
Vibrating head slightly vibrates 5-8s, discharges gas in concrete；Thereafter 50-70cm concrete is poured again, and cycle operation, cylinder is filled
Afterwards, vibrating head following 50-80cm to cylinder is made, while draw out shaking so that the removal of bubbles of column body concrete.
4. a kind of construction method for being applied to prestressed concrete column group according to claims 1, it is characterised in that：
While first wheel post group pours self-compacting concrete, the second round post group starts reinforcing bar colligation, bellows and installs, and SSC is poured
Complete second day, steel form was just detachable, circulates to the second round；First round SSC has been poured the 3rd day, and the second wheel reinforcing bar is tied up
Prick, bellows is installed, punching block starts formwork, and after three rounds terminate, the first round post group can carry out post-tension of pre-stress
Method is constructed.
5. a kind of construction method for being applied to prestressed concrete column group according to claim 1, it is characterised in that：It is described
Prestressed column section is larger, casting of concrete in mass need to take effectively, long-time maintenance measure, to control thermal cracking,
Meet the quality requirement of next stage post-tensioned prestressed daraf(reciprocal of farad) construction, avoid the secondary destruction to structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610978811.8A CN106639153B (en) | 2016-11-08 | 2016-11-08 | A kind of construction method applied to prestressed concrete column group |
Applications Claiming Priority (1)
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|---|---|---|---|
| CN201610978811.8A CN106639153B (en) | 2016-11-08 | 2016-11-08 | A kind of construction method applied to prestressed concrete column group |
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| CN106639153A true CN106639153A (en) | 2017-05-10 |
| CN106639153B CN106639153B (en) | 2019-10-25 |
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| CN102286925A (en) * | 2011-07-08 | 2011-12-21 | 四川路航建设工程有限责任公司 | Bridge single column pier assembled box bracket system and mounting method thereof |
| CN102864927A (en) * | 2012-10-10 | 2013-01-09 | 南通纺织职业技术学院 | Large-section special-shaped combined steel and concrete column construction method |
| CN103938871A (en) * | 2014-03-27 | 2014-07-23 | 湖南顺天建设集团有限公司 | Method for constructing concrete-filled steel tube column and bonded prestressed frame beam structure adopting reinforced concrete ring beam joints |
| US8931345B2 (en) * | 2011-10-17 | 2015-01-13 | Korea Institute Of Construction Technology | Apparatus for measuring concrete strength and slip form method for constructing vertical concrete column member using surface wave velocity measurement device |
-
2016
- 2016-11-08 CN CN201610978811.8A patent/CN106639153B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102286925A (en) * | 2011-07-08 | 2011-12-21 | 四川路航建设工程有限责任公司 | Bridge single column pier assembled box bracket system and mounting method thereof |
| US8931345B2 (en) * | 2011-10-17 | 2015-01-13 | Korea Institute Of Construction Technology | Apparatus for measuring concrete strength and slip form method for constructing vertical concrete column member using surface wave velocity measurement device |
| CN102864927A (en) * | 2012-10-10 | 2013-01-09 | 南通纺织职业技术学院 | Large-section special-shaped combined steel and concrete column construction method |
| CN103938871A (en) * | 2014-03-27 | 2014-07-23 | 湖南顺天建设集团有限公司 | Method for constructing concrete-filled steel tube column and bonded prestressed frame beam structure adopting reinforced concrete ring beam joints |
Non-Patent Citations (2)
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| 张晓宇: "浅析薄壁空心高墩自带支架模板流水法施工技术", 《中小企业管理与科技》 * |
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