CN103603507A - Two-side or three-side wrapping type reinforced concrete column underpinning method - Google Patents
Two-side or three-side wrapping type reinforced concrete column underpinning method Download PDFInfo
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- CN103603507A CN103603507A CN201310530831.5A CN201310530831A CN103603507A CN 103603507 A CN103603507 A CN 103603507A CN 201310530831 A CN201310530831 A CN 201310530831A CN 103603507 A CN103603507 A CN 103603507A
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Abstract
The invention discloses a two-side or three-side wrapping type reinforced concrete column underpinning method. A steel plate (5) with a preformed hole is adhered to a spatially limited side of an underpinned reinforced concrete column (1), and reinforced concrete column embracing beams (2) are cast on the other surfaces. The length of the two ends of the steel plate stretching out of the underpinned column is as same as that of each column embracing beam; 2-4 layers of [-shaped horizontal reinforcing steel bars (3) are welded on the steel plate (5) along the height direction; the other un-welding end of the reinforcing steel bar (3) is anchored in the column embracing beam (2) which is connected to the reinforcing steel bar (3). A preformed hole is also formed in the steel plate (5) relative to the column embracing beams and corresponds to the preformed hole in the steel plate (5); a bolt (4) is used for pulling oppositely so as to apply a pre-pressure and increase integrality of column embracing nodes; a screwing nut anchorage device (7) is used for applying a pre-stress to a bolt beam end. As adhesive steel and the column embracing beams compose asymmetrical underpinning nodes, and a pre-stressed tendon is stretched and drawn to improve the integrity of the underpinning nodes and the underpinning bearing capacity, the two-side or three-side wrapping type reinforced concrete column underpinning method avoids limitation of a construction site efficiently, is high in underpinning reliability and convenient in construction.
Description
Technical field
Patent of the present invention relates to a kind of support and change method of reinforced concrete post and underpins joint structure, belongs to the ambit of Reinforcement of Engineering Structure transformation and prestressing technique application.
Background technology
Reinforced concrete structure is domestic and international application one of form of structure the most widely, due to design, constructional deficiency, and the reasons such as the damage of the various physics of nature, chemistry and biological agent or lifting instructions for use, a large amount of engineering structuress need to be carried out strengthening reconstruction.Structure underpinning technique is to underpin safely by changing the mode implementation structure of load bang path, and this technology fields such as engineering, building large-space rebuilding engineering, whole building displacement engineering of rectifying a deviation at building jacking are widely used.Modal engineering underpins and comprises that column bracket changes with body of wall and underpin.The support and change method of post has that steel concrete packaging type underpins at present, wear reinforcing bar in post or screw rod underpins.Underpin post surface adopts the processing methods such as dabbing, cut-in groove to improve the roughness at interface more.The four sides packaging type that conventional steel concrete column underpinning method all adopts substantially at present.
In recent years, along with existing building anti-seismic performance promotes and the improvement project of functional promotion increases day by day, under post, underpinning technique application is increasingly extensive, but due to adjacent structure next-door neighbour, the clear distance that is underpined post and adjacent structure in many houses is about 10cm only, and the support and change methods such as the conventional thick pillar of reinforced concrete post, bar planting do not possess execution conditions.
Summary of the invention
While the object of the invention is to be restricted for reinforced concrete post construction plant, conventional support and change method inconvenience application or construction risk are higher, develop a kind of applicable narrow and small construction plant, safe and reliable, easy construction, column underpinning method that cost is low.
The present invention is achieved through the following technical solutions goal of the invention:
Adopting in small space affixing steel plate method to realize this side vertical load wears and passs; Its lap adopts the conventional support and change method of embracing.Employing welds on steel plate that " method of [" steel bar connects into integral body by steel plate and thick pillar beam.Employing and steel plate opposite between wear prestressing force screw rod method increase the whole globality that underpins node, improve and underpin bearing capacity.
When a side narrow space, form the form that underpins of a steel plate-tri-thick pillar beam, when the narrow space of two sides, form the form that underpins of steel plate-two sides, two sides thick pillar beam.
Two sides or three packaging type steel concrete column underpinning methods, is characterized in that: at quilt, underpined reinforced concrete post (1) limited space one side and adopt structure glue to be pasted with the steel plate (5) of preformed hole, other faces are built reinforced concrete mount post beam (2).Steel plate (5) two ends stretch out that to be underpined column length identical with connected thick pillar beam, arrange L shaped horizontal reinforcement (3) steel plate (5) is upper along short transverse welding 2-3, and the other end of the non-welding of reinforcing bar (3) anchors into embracing in beam (2) of being attached thereto.Steel plate (5) is also preformed hole in thick pillar beam relatively, corresponding with steel plate (5), with bolt (4), to drawing, applies precompression increase thick pillar node globality, and bolt beam-ends applies prestressing force with screwing nut anchor (7).
Described reinforced concrete post adopts two sides or three thick pillar beams, the underpinning technique of narrow space face affixing steel plate.Steel plate (5) adopts structure glue bonding with post interface.Steel plate height is not less than 2/3 of thick pillar depth of beam, and thickness is not less than 16mm.
The cylinder that described thick pillar beam (2) contacts is answered dabbing, and the concavo-convex degree of depth of its dabbing is not less than 6mm.
Effect of the present invention and benefit are:
This contrive equipment utilizes that thick pillar underpins, affixing steel plate reinforcement and prestressing technique is integrated changes node with column bracket, completes reliably underpining of reinforced concrete post under narrow space condition.
The method underpins that reliability is high, easy construction, has not yet to see about solving technical measures and the pertinent literature thereof of this type of key issue.
This support and change method is not only applicable to the column bracket of local space when narrow and small and changes, and when operating space is enough, can adopt this support and change method yet, and because assembling reinforcement amount is less, its speed of application changes than steel bar concrete four sides thick pillar corbel soon.
Accompanying drawing explanation
Fig. 1 is three packaging type underpinning device plan views in the present invention
Fig. 2 is two sides packaging type underpinning device plan view in the present invention
Fig. 3 is three packaging type underpinning device A-A elevation in the present invention
Fig. 4 is three packaging type underpinning device B-B elevation in the present invention
Fig. 5 is two sides packaging type underpinning device C-C elevation in the present invention
Fig. 6 is two sides packaging type underpinning device D-D elevation in the present invention
In Fig. 1-6, (1) is underpined reinforced concrete post; (2) thick pillar beam; (3) " [" or " L " steel bar; (4) prestressing force Screw arbor with nut at both-ends; (5) direction one steel plate; (6) direction two steel plates; (7) nut anchor.
the specific embodiment
Adopt two sides or three methods that packaging type technology underpins reinforced concrete post, at the two sides or three faces that are underpined reinforced concrete post (1), build thick pillar beam, avoided the restriction in place, completed underpining of reinforced concrete post.
Adopting in small space affixing steel plate method to realize this side vertical load wears and passs; Its lap adopts the conventional support and change method of embracing.Employing welds on steel plate that " method of [" steel bar (3) connects into integral body by steel plate and thick pillar beam (2).Employing and steel plate opposite between wear prestressing force screw rod method increase the whole globality that underpins node, improve and underpin bearing capacity.
When a side narrow space, form the form that underpins of a steel plate-tri-thick pillar beam, when the narrow space of two sides, form the form that underpins of steel plate-two sides, two sides thick pillar beam.
Two sides or three packaging type steel concrete column underpinning methods, is characterized in that: underpined the steel plate (5) that reinforced concrete post (1) limited space one side is pasted with preformed hole, other faces are built reinforced concrete mount post beam (2).Steel plate (5) two ends stretch out that to be underpined column length identical with connected thick pillar beam, arrange L shaped horizontal reinforcement (3) steel plate (5) is upper along short transverse welding 2-3, and the non-welding ends of reinforcing bar (3) anchors into embracing in beam (2) of being attached thereto.Steel plate (5) is also preformed hole in thick pillar beam relatively, corresponding with steel plate (5), with bolt (4), to drawing, applies precompression increase thick pillar node globality, and bolt beam-ends applies prestressing force with screwing nut anchor (7).
Described reinforced concrete post adopts two sides or three thick pillar beams, the underpinning technique of narrow space face affixing steel plate.Steel plate (5) adopts structure glue bonding with post interface.Steel plate height is not less than 2/3 of thick pillar depth of beam, and thickness is not less than 16mm.
The cylinder of described thick pillar beam (2) is answered dabbing, and the concavo-convex degree of depth of its dabbing is not less than 6mm.
Concrete grammar step:
(1) in underpining altitude range by three about 6mm of equal dabbing of reinforced concrete post (1), narrow space facet wheel polishing, wash down.
(2) steel plate (5) with the reserved circular hole of structure glue bonding at narrow space one lateral column face
(3) at steel plate (5), above along short transverse welding layer 2-4, " [" or " L " reinforcing bar (3), the reinforcing bar other end anchors in the thick pillar beam being attached thereto, and guarantees enough anchorage lengths.
(4) colligation thick pillar beam steel, the steel concrete thick pillar beam (2) of building at three faces.Corresponding steel plate perforate reserving hole channel in thick pillar beam, guarantees that corresponding steel plate reserves circular hole, Bao Zhuliang reserving hole channel on same straight line, in order to penetrating Screw arbor with nut at both-ends (4).
(5) in steel plate opposite thick pillar beam outside, penetrate screw rod (4), adopt nut (7) to tighten.
(6) adopt torque spanner to apply prestressing force according to setting value.
Claims (3)
1. a two sides or three packaging type steel concrete column underpinning methods, it is characterized in that: at quilt, underpined reinforced concrete post (1) limited space one side and adopt structure glue to be pasted with the steel plate (5) of preformed hole, other faces are built reinforced concrete mount post beam (2), steel plate (5) two ends stretch out that to be underpined column length identical with connected thick pillar beam, at steel plate (5), above along short transverse welding 2-3, arrange L shaped horizontal reinforcement (3), the other end of the non-welding of reinforcing bar (3) anchors into embracing in beam (2) of being attached thereto, steel plate (5) is also preformed hole in thick pillar beam relatively, corresponding with steel plate (5), with bolt (4) to drawing, apply precompression and increase thick pillar node globality, bolt beam-ends applies prestressing force with screwing nut anchor (7).
2. a kind of two sides as claimed in claim 1 or three packaging type steel concrete column underpinning methods, is characterized in that: described steel plate (5) is highly not less than 2/3 of thick pillar depth of beam, and thickness is not less than 16mm.
3. a kind of two sides as described in claim 1 or three packaging type steel concrete column underpinning methods, is characterized in that: the cylinder that described thick pillar beam (2) contacts is answered dabbing, and the concavo-convex degree of depth of its dabbing is not less than 6mm.
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| CN201310530831.5A CN103603507B (en) | 2013-11-01 | 2013-11-01 | A kind of two sides or three packaging type steel concrete column underpinning methods |
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| CN201310530831.5A CN103603507B (en) | 2013-11-01 | 2013-11-01 | A kind of two sides or three packaging type steel concrete column underpinning methods |
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| CN103603507B CN103603507B (en) | 2015-11-25 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104846750A (en) * | 2015-04-20 | 2015-08-19 | 上海同罡建筑工程有限公司 | Underpinning method for prestress friction type massive pillar girders with seams |
| CN105155868A (en) * | 2015-09-16 | 2015-12-16 | 项剑锋 | Method for pulling pillar through prestress using non-binding steel strands |
| CN105863292A (en) * | 2016-04-24 | 2016-08-17 | 江苏省华建建设股份有限公司 | Clamped beam device used for masonry structure wall backward-formed hole and installation method of clamped beam device |
| CN109914697A (en) * | 2019-04-18 | 2019-06-21 | 中民筑友房屋科技集团有限公司 | A kind of assembling frame structural construction prefabricated post |
| CN110761579A (en) * | 2019-09-24 | 2020-02-07 | 同济大学建筑设计研究院(集团)有限公司 | Section steel stay bar type column underpinning node and application method thereof |
| CN111794440A (en) * | 2020-07-15 | 2020-10-20 | 同济大学建筑设计研究院(集团)有限公司 | Underpinning node for concrete filled steel tubular column |
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| JP2003166352A (en) * | 2001-11-30 | 2003-06-13 | Nippon Telegraph & Telephone West Corp | Method for reinforcing concrete column, and reinforced concrete column |
| CN101429819A (en) * | 2007-11-07 | 2009-05-13 | 上海天演建筑物移位工程有限公司 | Wall and column underpinning method |
| CN102661056A (en) * | 2012-03-12 | 2012-09-12 | 河海大学 | Apparatus for underpinning reinforced concrete column by adopting prestress technology |
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| CN2440890Y (en) * | 2000-08-16 | 2001-08-01 | 广州市鲁班建筑防水补强专业公司 | Construction tool style sectional steel coated column bearing stage |
| JP2003166352A (en) * | 2001-11-30 | 2003-06-13 | Nippon Telegraph & Telephone West Corp | Method for reinforcing concrete column, and reinforced concrete column |
| CN101429819A (en) * | 2007-11-07 | 2009-05-13 | 上海天演建筑物移位工程有限公司 | Wall and column underpinning method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104846750A (en) * | 2015-04-20 | 2015-08-19 | 上海同罡建筑工程有限公司 | Underpinning method for prestress friction type massive pillar girders with seams |
| CN105155868A (en) * | 2015-09-16 | 2015-12-16 | 项剑锋 | Method for pulling pillar through prestress using non-binding steel strands |
| CN105863292A (en) * | 2016-04-24 | 2016-08-17 | 江苏省华建建设股份有限公司 | Clamped beam device used for masonry structure wall backward-formed hole and installation method of clamped beam device |
| CN105863292B (en) * | 2016-04-24 | 2018-05-18 | 江苏省华建建设股份有限公司 | A kind of clamping boom device and its installation method for punching after Masonry Wall |
| CN109914697A (en) * | 2019-04-18 | 2019-06-21 | 中民筑友房屋科技集团有限公司 | A kind of assembling frame structural construction prefabricated post |
| CN109914697B (en) * | 2019-04-18 | 2023-07-14 | 中民筑友房屋科技集团有限公司 | Prefabricated column for assembled frame structure building |
| CN110761579A (en) * | 2019-09-24 | 2020-02-07 | 同济大学建筑设计研究院(集团)有限公司 | Section steel stay bar type column underpinning node and application method thereof |
| CN110761579B (en) * | 2019-09-24 | 2023-08-08 | 同济大学建筑设计研究院(集团)有限公司 | Profile steel stay bar type column underpinning node and application method thereof |
| CN111794440A (en) * | 2020-07-15 | 2020-10-20 | 同济大学建筑设计研究院(集团)有限公司 | Underpinning node for concrete filled steel tubular column |
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| CN103603507B (en) | 2015-11-25 |
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