CN101761241A - Roof suspended type method for pulling out pillars - Google Patents
Roof suspended type method for pulling out pillars Download PDFInfo
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- CN101761241A CN101761241A CN200910186727A CN200910186727A CN101761241A CN 101761241 A CN101761241 A CN 101761241A CN 200910186727 A CN200910186727 A CN 200910186727A CN 200910186727 A CN200910186727 A CN 200910186727A CN 101761241 A CN101761241 A CN 101761241A
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Abstract
The present invention relates to a roof suspended type method for pulling out pillars. In the structure reformation method, vertical load bore by original central pillars is transferred to the center of side pillars in a mode that original roof beams are suspended by prestress exerted by steel truss reverse arches and suspenders, and the central pillars below the roof are pulled out to make the top layer become a large compartment. Original roof beam cracks due to internal force redistribution are avoided, the side pillars do not need to be reinforced, original use clear height is not reduced, and the construction period is short. The purposes for eliminating the influence on clear height, shortening site construction period, avoiding the arrangement of temporary support, reducing comprehensive cost and clearing potential safety hazards are achieved. The load transferring path is clear, and the original central pillars are directly replaced by a steel truss. Reverse arch and prestress measures can be adopted in advance according to calculation without damaging original roof beams or changing the stress states of the original roof beams. The hidden trouble that new and original concrete are not tightly combined or tightly vibrated is eliminated, and reformation safety is largely improved.
Description
Technical field
The present invention relates to a kind of building structure reconstruction method, relate in particular to a kind of the suspension at roofing and pull out post, realize that top layer transform the method for large bay as with steel truss.
Background technology
At present, much used the multistory reinforced concrete frame structure building in about 10 years, carried out local modification according to the change of function, need obtain large bay at the top layer in house, the method for generally taking to pull out post obtains this function.Because the increasing at double of span, the strength and stiffness of intrinsic roof girder do not satisfy requirement far away.The general employing of traditional method adds the crossbeam section, can cause the eccentric bending moment of top layer side column to strengthen like this, also will strengthen the section of side column simultaneously, often can't satisfy a layer clear height requirement.And the increasing of post need be reinforced two to three layers of post, and the workload of reinforcing is big, influences the normal use of other floors.The old and new's reinforced concrete sandwich position intractability is big, and newly-increased reinforcing steel bar bear has hysteresis effect, and the superposed beam amount of deflection is difficult to control, exist roof girder to occur the crack easily, the construction period is long, and a large amount of interim supports must be set during construction, safety is very poor, integrated cost height, shortcoming such as potential safety hazard is big.Other has a kind of joist to pull out the method for post, also there is the joist unstability and can't satisfies the shortcoming that layer clear height requires, it is at the amputation capital cross girder steel to be set to hold, the load that the amputation post is born is passed to the cross joist, then by the cross joist with load around passing to four concrete columns and the basis after this post of amputation again.
Summary of the invention
The object of the present invention is to provide a kind of original building structure that do not reduce to use clear height, avoid side column to reinforce the roof suspended type method for pulling out pillars of short construction period, overcoming joist pulls out the post method and influences clear height, the increasing method of sections construction period is long, integrated cost height, the shortcoming that potential safety hazard is big.
A kind of roof suspended type method for pulling out pillars, it is characterized in that: utilize steel truss antiarch and suspension rod to apply the mode that prestressing force is hung original roof girder, the vertical load that former center pillar bore is delivered to the side column center, pulls out intermediolateral column under the roofing to obtain the structure of modification method of top layer large bay.Avoid former roof girder because redistribution of internal force produces the crack, avoid side column to reinforce, do not reduce former use clear height, short construction period.Reaching does not influence clear height, shortens the site operation duration, and interim support need not be set, and reduces integrated cost, the purpose that eliminates safe hidden trouble.
A kind of roof suspended type method for pulling out pillars is characterized in that: utilize steel truss and prestressing force suspension rod to be installed on the roofing, pull out under the roofing intermediolateral column to obtain the top layer large bay, steel truss adopts H shaped steel as upper and lower chord member, H shaped steel web horizontal positioned; The steel truss web member adopts the double flute steel to connect with batten plate; Suspension rod adopts the double nut high-strength bolt to be connected with boots formula gusset plate.Boots formula gusset plate divides roofing top and roof girder lower part under the truss.
A kind of roof suspended type method for pulling out pillars, steel truss should be according to calculating the amount of deflection arch camber during installation, and suspension rod should tighten and make it to reach the pretension of calculating according to the pulling force that calculates with torque spanner; Steel truss and steel concrete capital should be hinged, and the counter-force center is the post center, and steel truss is established supporting rod according to calculating outside the plane; Established suspension rod when pulling out post earlier, suspension rod is by being located at the boots formula gusset plate tensioning pretension at the bottom of truss lower edge and lower rebar concrete post two side frame beams, the method that lower rebar concrete post adopts machine cuts roof girder at the bottom of post excision below the boots formula gusset plate.
Good effect of the present invention is: 1, do not influence clear height, shorten the site operation duration, reduce integrated cost, adopt increasing method of sections or joist to pull out the post method and construct, after the reinforcing, the floor clear height reduces, and function of use is poor.Concrete has 28 days requirement in the length of time, and the construction period is long, influences other floors and uses the integrated cost height.And employing the present invention, the frame column that do not need reinforcement, member all can be installed on roofing at produce in factory, do not influence floor to use clear height, construction period not to influence other floors uses, and the site operation duration is short, and a large amount of interim supports need not be set, and integrated cost is low.Construction is transformed on-the-spot clean and tidy.2, security performance is good, and adopt strengthening the method for sections newly-increased reinforcing steel bar bear of constructing has hysteresis effect, and the superposed beam amount of deflection is difficult to control, exists roof girder to occur the crack easily; The New-old concrete interface is handled and is not easy to put in place, and it is real that concrete is difficult to shake puddling.There is certain potential safety hazard.Power transmission route of the present invention is clear and definite, directly replace the effect of original center pillar with steel truss, can be according to calculating antiarch and the prestressing force measure taked in advance, need not to damage original roof girder, and original roofing beam stress state is constant, solved the shake of bond between fresh and hardened concretes leakiness and concrete and smash uncompacted hidden danger, the degree of safety of transformation is improved greatly.
Description of drawings
The steel truss hanging beam structural representation that Fig. 1 adopts for the present invention
The specific embodiment
There is the foreign affairs office building of one nine floor in certain provincial capital urban centre, and frame construction was used 10 years, former design does not have the large bay conference room, one end is arranged in length and breadth two to being three posts, the owner intends pulling out a center pillar at top layer, and two separated conference rooms are transformed into a large conference room.Side column is curtain wall outward and can not damages, beneath each layer needs normal office work.Adding the crossbeam section in the bottom needs reinforced column simultaneously, influences floor clear height and lower floor and uses, and can destroy the curtain wall of facade.And the construction period is long, and concrete strengthens method of sections and vetoed by the owner.Adopt concrete work progress of the present invention as follows: at first at steel work processing factory machined steel truss 1, boots formula gusset plate 2, lateral support; If steel truss 1 size can't be transported, sectional or the processing of branch member.Secondly, adopt crane that the steel member is hung on roofing 6, the capital steel plate is set up with the bar planting method in side column 4 tops of lattice bearing; Four suspension centres are set, and two suspension centres that wherein pull out the post place are located on the combination web member of truss.All loads of original center pillar are born in the design of this combination suspension centre, and other two suspension centres are that the auxiliary reinforcement node at secondary beam place is as safety stock; Roofing 6 plates are being provided with the perforation of suspension centre place, and size is determined that by double nut bolt suspension rod 3 steel truss 1 is according to calculating arch camber and in place on roofing; Suspension rod 3 is by being located at boots formula gusset plate 2 tensionings at the bottom of truss lower edge and lower rebar concrete post two side frame beams and reaching the calculating pretension.Once more, cut the following top layer of beam boots formula gusset plate frame column 5 partly, should take the binding measure during excision post with cutting machine; avoid reinforced concrete post to fall down to damage floor structure; after the frame column of being pulled out transports the scene, remove the protectiveness support is set under the roof girder, structure of modification is finished.Construct according to method of the present invention, reached the most desirable requirement of owner.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention; make some alternative or obvious modification that are equal to without departing from the inventive concept of the premise; and performance or purposes are identical, then should be considered as belonging to the protection domain that the present invention is determined by claims of being submitted to.
Claims (3)
1. roof suspended type method for pulling out pillars, it is characterized in that: utilize steel truss antiarch and suspension rod to apply the mode that prestressing force is hung original roof girder, the vertical load that former center pillar bore is delivered to the side column center, pulls out intermediolateral column under the roofing to obtain the structure of modification method of top layer large bay.
2. roof suspended type method for pulling out pillars according to claim 1, it is characterized in that: utilize steel truss and prestressing force suspension rod to be installed on the roofing, steel truss adopts H shaped steel as upper and lower chord member, H shaped steel web horizontal positioned, the steel truss web member adopts the double flute steel to connect with batten plate, and suspension rod adopts the double nut high-strength bolt to be connected with boots formula gusset plate.
3. roof suspended type method for pulling out pillars according to claim 1 and 2 is characterized in that: steel truss should be according to calculating the amount of deflection arch camber during installation, and suspension rod should tighten and make it to reach the pretension of calculating according to the pulling force that calculates with torque spanner; Steel truss and steel concrete capital should be hinged, and the counter-force center is the post center, and steel truss is established supporting rod according to calculating outside the plane; Established suspension rod when pulling out post earlier, suspension rod is by being located at the boots formula gusset plate tensioning pretension at the bottom of truss lower edge and lower rebar concrete post two side frame beams, the method that lower rebar concrete post adopts machine cuts roof girder at the bottom of post excision below the boots formula gusset plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910186727A CN101761241A (en) | 2009-12-17 | 2009-12-17 | Roof suspended type method for pulling out pillars |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910186727A CN101761241A (en) | 2009-12-17 | 2009-12-17 | Roof suspended type method for pulling out pillars |
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| CN101761241A true CN101761241A (en) | 2010-06-30 |
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| CN200910186727A Pending CN101761241A (en) | 2009-12-17 | 2009-12-17 | Roof suspended type method for pulling out pillars |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102140849A (en) * | 2011-01-24 | 2011-08-03 | 中冶赛迪工程技术股份有限公司 | Method for underpinning roof structure and expanding column space of steel structure factory building |
| CN104652824A (en) * | 2014-12-26 | 2015-05-27 | 中国核工业华兴建设有限公司 | Steel bar bracket for binding steel bars on exterior of CR10 module of nuclear power plant |
| CN111502004A (en) * | 2020-04-23 | 2020-08-07 | 上海建工四建集团有限公司 | Special-shaped large-span suspension stiffness structure and construction method thereof |
| CN112502471A (en) * | 2020-12-30 | 2021-03-16 | 中国电建集团河南省电力勘测设计院有限公司 | Steel frame structure joist column pulling transformation and reinforcement method and structure |
| CN113638616A (en) * | 2021-05-14 | 2021-11-12 | 安徽芜湖海螺建筑安装工程有限责任公司 | Method for reinforcing steel truss on top of concrete silo |
| CN113931056A (en) * | 2020-06-29 | 2022-01-14 | 中国二十冶集团有限公司 | Beam boot protection device |
-
2009
- 2009-12-17 CN CN200910186727A patent/CN101761241A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102140849A (en) * | 2011-01-24 | 2011-08-03 | 中冶赛迪工程技术股份有限公司 | Method for underpinning roof structure and expanding column space of steel structure factory building |
| CN104652824A (en) * | 2014-12-26 | 2015-05-27 | 中国核工业华兴建设有限公司 | Steel bar bracket for binding steel bars on exterior of CR10 module of nuclear power plant |
| CN111502004A (en) * | 2020-04-23 | 2020-08-07 | 上海建工四建集团有限公司 | Special-shaped large-span suspension stiffness structure and construction method thereof |
| CN113931056A (en) * | 2020-06-29 | 2022-01-14 | 中国二十冶集团有限公司 | Beam boot protection device |
| CN112502471A (en) * | 2020-12-30 | 2021-03-16 | 中国电建集团河南省电力勘测设计院有限公司 | Steel frame structure joist column pulling transformation and reinforcement method and structure |
| CN112502471B (en) * | 2020-12-30 | 2022-06-28 | 中国电建集团河南省电力勘测设计院有限公司 | Steel frame structure joist column pulling transformation and reinforcement method and structure |
| CN113638616A (en) * | 2021-05-14 | 2021-11-12 | 安徽芜湖海螺建筑安装工程有限责任公司 | Method for reinforcing steel truss on top of concrete silo |
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Open date: 20100630 |