CN106639153B - A kind of construction method applied to prestressed concrete column group - Google Patents
A kind of construction method applied to prestressed concrete column group Download PDFInfo
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- CN106639153B CN106639153B CN201610978811.8A CN201610978811A CN106639153B CN 106639153 B CN106639153 B CN 106639153B CN 201610978811 A CN201610978811 A CN 201610978811A CN 106639153 B CN106639153 B CN 106639153B
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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
Abstract
The present invention discloses a kind of construction method applied to prestressed concrete column group, using the self-compacting concrete with early epistasis matter, interfering with each other for casting process and intensive reinforcing bar in structure and pre-buried bellows is avoided, while concrete strength can meet post- tension construction requirement in a short time；Using reasonably casting method and concrete vibrating mode, vibrating time is controlled, guarantees concrete casting quality；Using set shaped steel formwork and control spillage measure, guarantee the presentation quality poured, and template circulation turnover can be accelerated, is used in conjunction with self-compacting concrete, shortens the construction period of entire column group；Guarantee sufficient curing time and reasonable maintenance measure, control prestressed column outer surface is cracked, avoids the secondary destruction of post- tension Construction on Structure.The present invention overcomes prestressed concrete column group's integral construction duration longer unfavorable factors.
Description
Technical field
The invention belongs to the science and technology in Construction of Civil Engineering field, devise a kind of construction method of prestressed column, especially
It is a kind of construction method applied to big section prestressed concrete column group.
Background technique
The construction of post-tensioned prestressed daraf(reciprocal of farad) is generally used for large span beam body, and when practice of construction requires beam body concrete strength big
It can implement when 90%.Due to beam body level, for normal concrete, operation side is big and depth is limited can be direct
Pour simultaneously, either bridge is still built, and the quantity of long-span beams is often limited (1-2 root).Therefore, wait strong concrete
Degree meets the time of post- tension construction for the total construction period of total, can be ignored.
However 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 pour downwards from column mouth, for non-prestressed column, structure
Simply, the influence there is no intensive reinforcing bar and bellows to concreting, but for prestressed column, then difficulty is more,
Structure is mutually restricted with pouring construction;The area of section of third, pillar is larger, belongs to casting of concrete in mass, thermal cracking
Existing probability is higher, but post-tensioned prestressed tension method is high to the pouring quality requirement of concrete, otherwise will be present biggish
To sum up, therefore prestressed concrete column group, often seldom adopts the high of quality, construction period of construction to structural hidden danger in building
It is designed with this theory of prestressed column group.
Summary of the invention
The purpose of the present invention is to solve deficiencies in the prior art, provide a kind of big section prestressed concrete column group
Construction method can recycle that complete the big section prestressing force of dozens of mixed in high quality within a short period of time according to this construction method
Solidifying earth pillar, meets the construction requirement of post-tensioned prestressed daraf(reciprocal of farad), construction efficiency greatly improves, and shortens construction period, increases simultaneously
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 flowing water batch first batch prestressed column is bound；
(2) according to construction drawing and flowing water batch, corresponding sizing punching block is selected；
(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 column group starts reinforcing bar binding, bellows
Installation, SSC have been poured second day, and steel form can be dismantled, circulation to the second round；First round SSC has poured third day, the
Two wheel reinforcing bars bindings, bellows install, and punching block starts formwork, and after three rounds, the first round column group can carry out pre-
The construction of stress post- tension；
(5) after steel form dismounting, to prestressed column overlay film, water seasoning starts to carry out prestressing force after having poured 10 days
Post- tension construction, but maintenance cannot still stop, until it is more than week to have poured 2；
(6) a further improvement of the present invention is that: the self-compacting concrete of selection has early epistasis matter, is pouring 10 days
Left and right time, intensity reach the 90% of design standard, meet the construction requirement of post-tensioned prestressed daraf(reciprocal of farad).
A further improvement of the present invention is that: it is constructed using set shaped steel formwork, is used in conjunction with, can protect with self-compacting concrete
Card pours the circulation of middle template, quickly utilizes, can shorten the whole duration.
A further improvement of the present invention is that: it in steel form seam and bolt hole, is sealed, is prevented from density with glass cement
Concrete spillage, guarantee pours presentation quality and column body concrete is full, uniform.
A further improvement of the present invention is that: in the casting process of self-compacting concrete, increase auxiliary operation:
1. carrying out drainage of vibrating for reinforcing bar Dense nodes, the time is controlled within 8s；
2. bucket will be altered to be placed on the inside of column, uniformly pour；It pours into after 50-70cm concrete, vibrating head is inserted into, then pour into
While concrete, vibrating head slightly vibrates 5-8s, and gas in concrete is discharged；Thereafter 50-70cm concrete is poured again, is recycled
Operation；After cylinder is filled, make following 50-80cm among vibrating head to cylinder, while drawing out vibration so that the bubble of column body concrete is arranged
It removes.
A further improvement of the present invention is that: prestressed column section is larger, casting of concrete in mass need to take effectively,
Long-time maintenance measure meets the quality requirement of next stage post-tensioned prestressed daraf(reciprocal of farad) construction, avoids to knot to control thermal cracking
The secondary destruction of structure.
The utility model has the advantages that
Using sizing steel plate formwork, pouring quality can guarantee, formwork and dismounting are convenient, and it is survivable, template can be accelerated
Circulation, circulation rate；Steel form seam and screw socket are sealed with glass cement, prevent dew from starching；Using mixed with early epistasis matter self-compaction
Solidifying soil substitutes traditional normal concrete, which not only has certain mobility, can avoid pouring Shi Yujie
Structure interferes with each other；And 10 days intensity is the 90% of design strength, meets post-tensioned prestressed daraf(reciprocal of farad) construction；In the first wheel post group
While pouring SSC, the reinforcing bar binding of the second round prestressed concrete column can be carried out simultaneously, and the installation of bellows, SSC is poured
Complete second day, steel form can be dismantled；Third day is poured, reinforcing bar, the bellows of the second wheel prestressed concrete column are completed
The installation that can carry out steel form can according to said method realize recycling for steel form, reduce time to wait.
The present invention can recycle in high quality within a short period of time completes the big section prestressed concrete column of dozens of, meets pre-
The construction requirement of stress post- tension, construction efficiency greatly improve, and shorten construction period, while increasing construction benefit.
Specific embodiment
Below in conjunction with the specific embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.
For the newly-built large-scale airplane exhibition pipe in the country (15 meters of prestressed column maximum pillar height, there is 1500mm*1500mm in section,
Tri- kinds of specifications of 1400mm*1400mm, 1400mm*1200mm, totally 72) structure is complicated, workload is 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 construction efficiency, shorten work
Phase.
Embodiment 1:
(1) according to the requirement of construction drawing, the reinforcing bar of flowing water batch first batch prestressed column is bound.
(2) it according to construction drawing and flowing water batch, selects corresponding sizing punching block sizing punching block to tear open and props up, stream can be shortened
The water turnaround time, while guaranteeing the presentation quality poured.
(3) concrete spillage is sealed in punching block seam crossing and stud hole with glass cement in order to prevent.
(4) for structure reinforcing bars, intensive, bellows and concreting such as mutually restrict at the final concreting matter of influences
The problem of amount, replaces normal concrete using self-compacting concrete, and the self-compacting concrete for pour 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, to improve the pouring quality of SSC entirety,
Drainage of vibrating is carried out for reinforcing bar Dense nodes, the time controls within 8s:
1. bucket will be altered to be placed on the inside of column, uniformly pour；
2. pouring into after 50-70cm concrete, vibrating head is inserted into, then when penetration concrete, vibrating head slightly vibrates 5-
Gas in concrete is discharged in 8s；Thereafter 50-70cm concrete, cycle operation are poured again；
3. after cylinder is filled, making following 50-80cm among vibrating head to cylinder, while drawing out vibration so that column body concrete
Removal of bubbles.
By the method, self-compacting concrete can be full of whole cylinder, and total quality is splendid.
(6) while the first wheel post group pours self-compacting concrete, the second round column group starts reinforcing bar binding, ripple
Pipe installation, SSC have been poured second day, and steel form can be dismantled, circulation to the second round；First round SSC has poured third day,
Second wheel reinforcing bar binding, bellows install, and punching block starts formwork, and after three rounds, the first round column group can be carried out
Post-tensioned prestressed daraf(reciprocal of farad) construction.
(7) since for casting of concrete in mass, aquation thermal endurance is longer, outer, prestressing force is removed in steel form
Column still needs to overlay film, water seasoning.Although starting to carry out post-tensioned prestressed daraf(reciprocal of farad) construction after having poured 10 days, maintenance cannot still stop
Only, until it is more than week to have poured 2.
(8) after post- tension construction, most possibly occur crack location to cylinder and be monitored, detective distance cylinder
Other than 1m, bolumn cap has no always crack with lower prestress bending section.
Above-mentioned specific embodiment, only technical concept and structure feature to illustrate the invention, it is therefore intended that allow and be familiar with this
The stakeholder of item technology can implement accordingly, but the above content is not intended to limit protection scope of the present invention, all according to this hair
Any equivalent change or modification made by bright Spirit Essence, should all fall under the scope of the present invention.
Claims (2)
1. a kind of construction method applied to prestressed concrete column group, it is characterised in that:
(1) according to the requirement of construction drawing, the reinforcing bar of flowing water batch first batch prestressed column is bound；
(2) according to construction drawing and flowing water batch, corresponding sizing punching block is selected；
(3) it in punching block seam crossing and stud hole, is sealed with glass cement；
(4) normal concrete is replaced using self-compacting concrete, is poured；
(5) in the casting process of self-compacting concrete, increase auxiliary operation, to guarantee that self-compacting concrete is full of whole cylinder
(6) binding of column group reinforcing bar, the installation of prestressing force bellows, steel form formwork and self-compacting concrete use cycle operation；
(7) after steel form dismounting, to prestressed column overlay film, water seasoning starts to carry out post-tensioned prestressed after having poured 10 days
Daraf(reciprocal of farad) construction, but maintenance cannot still stop, until it is more than week to have poured 2;
The self-compacting concrete of the selection has early epistasis matter, and intensity can reach design standard 90% within 10 days;
Auxiliary operation from density concrete casting process includes:
Drainage of vibrating is carried out for reinforcing bar Dense nodes, the time controls within 8s；
Bucket will be altered to be placed on the inside of column, poured into after 50-70cm concrete, by the insertion of vibration Chinese catalpa, then while penetration concrete,
Slightly vibrate 5-8s for vibration Chinese catalpa, and gas in concrete is discharged；Thereafter 50-70cm concrete, cycle operation are poured again, and cylinder fills
Man Hou makes to vibrate following 50-80cm among Chinese catalpa to cylinder, while vibration is drawn out, so that the removal of bubbles of column body concrete;
While first wheel post group pours self-compacting concrete, the second round column group starts reinforcing bar binding, bellows installation, SSC
It pours
Complete second day, steel form can be dismantled, circulation to the second round；First time SSC has poured third day, and the second wheel reinforcing bar is tied up
Prick, bellows installs, punching block starts formwork, and after three rounds, the first round column group can carry out post-tension of pre-stress
Method construction.
2. a kind of construction method applied to prestressed concrete column group according to claim 1, it is characterised in that: described
Prestressed column section is larger, casting of concrete in mass need to take effectively, long-time maintenance measure, to control thermal cracking,
The quality requirement for meeting next stage post-tensioned prestressed daraf(reciprocal of farad) construction, avoids the secondary destruction to structure.
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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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| 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 CN106639153A (en) | 2017-05-10 |
| CN106639153B true 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 |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103938871B (en) * | 2014-03-27 | 2016-03-02 | 湖南顺天建设集团有限公司 | A kind of construction method adopting the steel core concrete column bonded prestress frame beam structure of reinforced concrete ring beam joint |
-
2016
- 2016-11-08 CN CN201610978811.8A patent/CN106639153B/en active Active
Patent Citations (3)
| 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 |
Non-Patent Citations (2)
| Title |
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| 浅析薄壁空心高墩自带支架模板流水法施工技术;张晓宇;《中小企业管理与科技》;20130527;第9卷;第3节，附图1 * |
| 预应力混凝土柱的施工技术;王胜等;《青岛理工大学学报》;20061231;第27卷(第6期);第3.1,3.2节 * |
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