CN105625732A - Supporting-free construction method of ultrahigh overhung steel-structure truss - Google Patents

Supporting-free construction method of ultrahigh overhung steel-structure truss Download PDF

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Publication number
CN105625732A
CN105625732A CN201511025654.0A CN201511025654A CN105625732A CN 105625732 A CN105625732 A CN 105625732A CN 201511025654 A CN201511025654 A CN 201511025654A CN 105625732 A CN105625732 A CN 105625732A
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China
Prior art keywords
outside
girder
steel
floor
truss
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CN201511025654.0A
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CN105625732B (en
Inventor
王慧文
张岚
蔡小平
崔锡根
周燕峰
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Changzhou No1 Construction Group Co Ltd
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Changzhou No1 Construction Group Co Ltd
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/14Conveying or assembling building elements

Abstract

The invention provides a supporting-free construction method of an ultrahigh overhung steel-structure truss. A connecting steel corbel and a mounting suspension link of the overhung steel-structure truss are prearranged at set positions on a steel-reinforced concrete structure of a main body structure of a super high-rise building; after the construction of a concrete main structure of the super high-rise building is completed, the suspension mounting of a steel-structure truss is implemented; a steel cable pull rod is arranged to keep the structure stable; first, the mounting of the plane structure of an overhung floor of a first layer is completed; an upper layer of the overhung steel-structure truss is mounted layer by layer by utilizing the formed stable structure of the overhung floor of the first layer as a mounting operation platform. By using the supporting-free construction method of the ultrahigh overhung steel-structure truss, an ultra-high-system mounting bracket is not needed to be built, and a large hoisting device is not needed to be adopted; in comparison with a common mounting construction method of the ultrahigh overhung steel-structure truss, a working period can be greatly shortened; a construction cost is saved; meanwhile, the influence of the construction on a surrounding environment is largely reduced; the supporting-free construction method of the ultrahigh overhung steel-structure truss has favorable economic benefit, and has favorable social benefit.

Description

Superelevation overhanging steel structure truss support free construction method
Technical field
The present invention relates to construction techniques, it is specifically related to a kind of superelevation overhanging steel structure truss support free construction method.
Background technology
Currently, high-rise building is day by day common, is attractive in appearance or practical object, and on the middle top of its agent structure, high-rise position is often designed with outer cantilevered structure to high-rise building. Outer cantilevered structure relies on outer overhanging steel structure truss to realize usually, and thus the installation of outer overhanging steel structure truss is the basis of the outer cantilevered structure construction of high-rise building and an important ring. The outer cantilevered structure of high-rise building usually has structure height height, encorbelments the features such as span is big, difficulty of construction height outward. The installation of the outer overhanging steel structure truss of high-rise building, its conventional constructional method builds the mounting bracket of superelevation system from ground, adopts large lifting equipment to install. Its deficiency existed is construction cost height, long construction period, and when all there being the buildings built up around the high-rise building built, the workyard berth is less, when large lifting equipment cannot be utilized to construct, then the construction method of installation of common outer overhanging steel structure truss can not be suitable for.
Summary of the invention
It is an object of the invention to: a kind of mounting bracket without the need to building superelevation system is provided, without the need to adopting large lifting equipment, utilizes the high-rise building agent structure built up to adopt the superelevation overhanging steel structure truss support free construction method of unsettled installation purlin frame method construction.
The technical scheme of the present invention is: the superelevation overhanging steel structure truss support free construction method of the present invention, comprises the following steps:
Step one, preset steel corbel and suspension ring:
On the building body steel reinforced concrete structure of high-rise building, the steel corbel that overhanging steel structure truss connects and the draw ring installed are preset in the position of setting;
Step 2, first floor steel platform is installed:
1. inside the first floor, girder and inner side web member are installed: preset Eight characters wireline pull bar on the girder of each inner side, overall increase to installed height mark with tower crane, with the steel corbel bolt of corresponding position, each inner side girder is tentatively connected location; The other end of Eight characters wireline pull bar is connected with the chain block being arranged on draw ring, utilize chain block by the levelness of Eight characters wireline pull bar adjustment inner side girder and coordinate the installation of inner side web member, to design requirements, Eight characters wireline pull bar is fixedly connected with draw ring, and by fastening for each joint bolt;
2. inside the first floor, secondary beam is installed: after treating each inner side erection of main beam, installs inner side secondary beam between the girder of each inner side successively; The two ends of each inner side secondary beam are fixedly connected with inner side girder respectively; Thus form steel platform inside the first floor by each inner side girder and each inner side secondary beam;
3. bed board inside the first floor: laying construction plate on steel platform inside the first floor installed;
4. erection of main beam outside the first floor: preset Eight characters wireline pull bar on the girder of each outside, overall increase to installed height mark with tower crane, each outside girder is tentatively connected location with corresponding inner side girder with bolt; The other end of Eight characters wireline pull bar is connected with the chain block being arranged on draw ring, utilizes chain block to regulate the levelness of outside girder to be fixedly connected with draw ring by Eight characters wireline pull bar to design requirements by Eight characters wireline pull bar; Again by fastening for each joint bolt between outside girder and inner side girder;
5. outside the first floor, secondary beam is installed: after treating each outside erection of main beam, installs outside secondary beam between the girder of each outside successively; The two ends of each outside secondary beam are fixedly connected with outside girder respectively; Thus form steel platform outside the first floor by each outside girder and each outside secondary beam;
6. bed board outside the first floor: laying construction plate on steel platform outside the first floor installed;
Step 3, build service platform:
First floor steel platform is built the scaffolding service platform that more than two layers steel structure truss are installed;
Step 4, two layers of steel structure truss are installed:
1. inner side column is installed: utilize scaffolding service platform, respectively fixedly mounts 1 root post with bolt respectively, as inner side column on the girder of the first floor each inner side;
2. two layers of inner side erection of main beam: respectively fixedly mount 1 two layers inner side girder with bolt respectively between each inner side column and the corresponding steel corbel being arranged on building body steel reinforced concrete structure; Inner side web member completion between the first floor and two layers is installed complete simultaneously;
3. two layers of outside erection of main beam: respectively fixedly mount 1 root post with bolt respectively on the girder of the first floor each outside, as outside column; 1 two layers outside girder are respectively fixedly mounted with bolt respectively between each outside column and corresponding inner side column;
4. outside web member is installed: fixedly mount outside web member one by one with bolt between the outside girder at the first floor and the outside girder at two layers;
5. two level beams are installed: fixedly mount secondary beam between two layers of inner side girder and two layers of outside girder;
Step 5, install with the steel structure truss on upper strata for three layers and three layers:
Adopt such as the method for step 4, utilize scaffolding service platform three layers and three layers to be successively installed with the steel structure truss on upper strata, until the whole installation of structure;
Step 6, remove and off-set facility is installed:
First remove and build the scaffolding service platform on first floor steel platform; And then remove each Eight characters wireline pull bar one by one; The component removed utilizes carriage vertically tower crane to be transported to ground.
The present invention has positive effect: the superelevation overhanging steel structure truss support free construction method of (1) the present invention, it utilizes the high-rise building agent structure built up to adopt and installs purlin frame method construction without bracket-suspending, without the need to building the mounting bracket of superelevation system, also without the need to adopting large lifting equipment, compare to common superelevation overhanging steel structure truss installa-tion constructional method, significantly can save the duration, save construction cost, there is good economic benefit. (2) the superelevation overhanging steel structure truss support free construction method of the present invention, it has filled up when all there being the buildings built up around the high-rise building built, the workyard berth is less, carries out the blank of the construction method of installation of high-rise building outer overhanging steel structure truss when large lifting equipment cannot be utilized to construct. (3) the superelevation overhanging steel structure truss support free construction method of the present invention, adopting because of it utilizes the high-rise building agent structure built up without bracket-suspending installation method, its underpart is without the need to building the mounting bracket of the huge superelevation system of the scale of construction, simultaneously also without the need to adopting large lifting equipment, thus the environmental influence of surrounding is greatly reduced by construction, has good social benefit.
Accompanying drawing explanation
Fig. 1 is the facade structures schematic diagram of the overhanging steel structure truss adopting the method for the present invention to install;
Fig. 2 is the two dimensional structure schematic diagram of the overhanging steel structure truss adopting the method for the present invention to install;
Fig. 3 adopts the method for the present invention to install the facade structures schematic diagram inside the overhanging steel structure truss first floor;
Fig. 4 adopts the method for the present invention to install the facade structures schematic diagram outside the overhanging steel structure truss first floor;
Fig. 5 adopts the method for the present invention to install the facade structures schematic diagram inside the overhanging steel structure truss second layer;
Fig. 6 adopts the method for the present invention to install the facade structures schematic diagram outside the overhanging steel structure truss second layer.
Reference numeral in above-mentioned accompanying drawing is as follows:
Building body steel reinforced concrete structure 1,
Steel corbel 2, girder connection section 21, web member connection section 22,
Draw ring 3,
Eight characters wireline pull bar 4,
Inner side girder 5, beam body 51, inner side connection section 52, web member connection section 53, column connection section 54, outside connection section 55,
Inner side web member 6,
Outside girder the 7, two beam body 71, installs connection section the 72, two web member connection section the 73, two column connection section 74,
Outside web member 8,
Column 9,
Inner side secondary beam 10, outside secondary beam 11.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
(embodiment 1)
The superelevation overhanging steel structure truss support free construction method of the present embodiment, its technological principle is: on the steel reinforced concrete structure of high-rise building agent structure, the steel corbel that overhanging steel structure truss connects and the draw ring installed are preset in the position of setting, after the concrete main structure of high-rise building completes construction, implement the unsettled installation of steel structure truss, wireline pull bar holding structure is set and stablizes; First the installation first floor is encorbelmented flooring two dimensional structure, and upper strata truss installa-tion utilizes the stable first floor formed floor structure of encorbelmenting to install by layer as installation service platform.
Seeing Fig. 1 to Fig. 6, the superelevation overhanging steel structure truss support free construction method of the present embodiment, mainly comprises the following steps:
Step one, preset steel corbel and suspension ring:
The carriage vertically tower crane arranged when being retained in high-rise building main structure construction, in the present embodiment, carriage vertically tower crane model is TC7035B, the overhanging steel structure truss installa-tion position tower crane turning radius 50 meters, lift heavy 5.32 tons, tower crane adopts two multiplying powers to carry out overhanging steel structure truss component carriage vertically; On building body steel reinforced concrete structure 1, the steel corbel 2 of some overhanging steel structure truss connection and the draw ring 3 of some installations are preset in the position of setting; Steel corbel 2 is provided with girder connection section 21 and web member connection section 22.
Step 2, first floor steel platform is installed:
1. inside the first floor, girder and inner side web member are installed: as shown in Figure 3, and inner side girder 5 is made up of beam body 51, the inner side connection section 52 being located at beam body 51 the inner, the web member connection section 53 in outside being located at beam body 51, column connection section 54 and the outside connection section 55 of being located at beam body 1 outer end; 1 Eight characters wireline pull bar 4 it is fixedly installed in advance respectively at the beam body 51 of each inner side girder 5 and the joint portion of web member connection section 53 and column connection section 54, overall increase to installed height mark with tower crane, each inner side girder 5 is tentatively connected location by the girder connection section 21 of connection section inside it 52 with the steel corbel 2 of corresponding position with bolt; The other end of Eight characters wireline pull bar 4 is connected with the chain block being arranged on draw ring 3, utilize chain block by the levelness of Eight characters wireline pull bar 4 adjustment inner side girder 5 and coordinate the installation of inner side web member 6, to design requirements, Eight characters wireline pull bar 4 is fixedly connected with draw ring 3; By fastening for each joint bolt; Inner side web member 6 is fixedly connected with bolt respectively with the web member connection section 22 of steel corbel 2 and the web member connection section 53 of inner side girder 5;
2. inside the first floor, secondary beam is installed: after each inner side girder 5 installs, and installs inner side secondary beam 10 between each inner side girder 5 successively; The two ends of each inner side secondary beam 10 are fixedly connected with inner side girder 5 respectively; Thus form steel platform inside the first floor by each inner side girder 5 and each inner side secondary beam 10;
3. bed board inside the first floor: laying construction plate on steel platform inside the first floor installed;
4. erection of main beam outside the first floor: as shown in Figure 4, outside girder 7 by the 2nd beam body 71, be located at the installation connection section 72 inside the 2nd beam body 71, be located at the 2nd web member connection section 73 outside the 2nd beam body 71 and the 2nd column connection section 74 forms; 1 Eight characters wireline pull bar 4 it is fixedly installed in advance respectively at the 2nd beam body 71 of each outside girder 7 and the joint portion of the 2nd web member connection section 73 and the 2nd column connection section 74, overall increase to installed height mark with tower crane, each outside girder 7 is installed connection section 72 by it and is tentatively connected location with the outside connection section 55 of corresponding inner side girder 5 with bolt; The other end of Eight characters wireline pull bar 4 is connected with the chain block being arranged on draw ring 3, utilizes chain block to regulate the levelness of outside girder 7 to be fixedly connected with draw ring 3 by Eight characters wireline pull bar 4 to design requirements by Eight characters wireline pull bar 4; Again by fastening for each joint bolt between outside girder 7 and inner side girder 5;
5. outside the first floor, secondary beam is installed: after each outside girder 7 installs, and installs outside secondary beam 11 between each outside girder 7 successively; The two ends of each outside secondary beam 11 are fixedly connected with outside girder 7 respectively; Thus form steel platform outside the first floor by each outside girder 7 and each outside secondary beam 11;
6. bed board outside the first floor: laying construction plate on steel platform outside the first floor installed;
Step 3, build service platform:
First floor steel platform is built the scaffolding service platform that more than two layers steel structure truss are installed;
Step 4, two layers of steel structure truss install (as shown in Figure 5 and Figure 6):
1. inner side column is installed: utilize scaffolding service platform, respectively fixedly mounts 1 root post 9 with bolt respectively, as inner side column on the column connection section 54 of the first floor each inner side girder 5;
2. two layers of inner side erection of main beam: respectively fixedly mount 1 two layers inner side girder 5 with bolt respectively between each inner side column and the corresponding steel corbel 2 being arranged on building body steel reinforced concrete structure 1; Inner side web member 6 completion between the first floor and two layers is installed complete simultaneously;
3. two layers of outside erection of main beam: respectively fixedly mount 1 root post 9 with bolt respectively on the 2nd column connection section 74 of the first floor each outside girder 7, as outside column; 1 two layers outside girder 7 are respectively fixedly mounted with bolt respectively between each outside column and corresponding inner side column;
4. outside web member is installed: fixedly mount outside web member 8 one by one with bolt between the outside girder 7 at the first floor and the outside girder 7 at two layers;
5. two level beams are installed: fixedly mount secondary beam between two layers of inner side girder 5 and two layers of outside girder 7;
Step 5, install with the steel structure truss on upper strata for three layers and three layers:
Adopt such as the method for step 4, utilize scaffolding service platform three layers and three layers to be successively installed with the steel structure truss on upper strata, until the whole installation of structure;
Step 6, remove and off-set facility is installed:
First remove and build the scaffolding service platform on first floor steel platform; And then remove each Eight characters wireline pull bar 4 one by one; The component removed utilizes carriage vertically tower crane to be transported to ground.
Above embodiment is the explanation to the specific embodiment of the present invention; but not limitation of the present invention; person skilled in the relevant technique is without departing from the spirit and scope of the present invention; can also making various conversion and change and obtain corresponding equivalent technical scheme, therefore all equivalent technical schemes all should be included into the scope of patent protection of the present invention.

Claims (1)

1. a superelevation overhanging steel structure truss support free construction method, it is characterised in that: comprise the following steps:
Step one, preset steel corbel and suspension ring:
On the building body steel reinforced concrete structure of high-rise building, the steel corbel that overhanging steel structure truss connects and the draw ring installed are preset in the position of setting;
Step 2, first floor steel platform is installed:
1. inside the first floor, girder and inner side web member are installed: preset Eight characters wireline pull bar on the girder of each inner side, overall increase to installed height mark with tower crane, with the steel corbel bolt of corresponding position, each inner side girder is tentatively connected location; The other end of Eight characters wireline pull bar is connected with the chain block being arranged on draw ring, utilize chain block by the levelness of Eight characters wireline pull bar adjustment inner side girder and coordinate the installation of inner side web member, to design requirements, Eight characters wireline pull bar is fixedly connected with draw ring, and by fastening for each joint bolt;
2. inside the first floor, secondary beam is installed: after treating each inner side erection of main beam, installs inner side secondary beam between the girder of each inner side successively; The two ends of each inner side secondary beam are fixedly connected with inner side girder respectively; Thus form steel platform inside the first floor by each inner side girder and each inner side secondary beam;
3. bed board inside the first floor: laying construction plate on steel platform inside the first floor installed;
4. erection of main beam outside the first floor: preset Eight characters wireline pull bar on the girder of each outside, overall increase to installed height mark with tower crane, each outside girder is tentatively connected location with corresponding inner side girder with bolt; The other end of Eight characters wireline pull bar is connected with the chain block being arranged on draw ring, utilizes chain block to regulate the levelness of outside girder to be fixedly connected with draw ring by Eight characters wireline pull bar to design requirements by Eight characters wireline pull bar; Again by fastening for each joint bolt between outside girder and inner side girder;
5. outside the first floor, secondary beam is installed: after treating each outside erection of main beam, installs outside secondary beam between the girder of each outside successively; The two ends of each outside secondary beam are fixedly connected with outside girder respectively; Thus form steel platform outside the first floor by each outside girder and each outside secondary beam;
6. bed board outside the first floor: laying construction plate on steel platform outside the first floor installed;
Step 3, build service platform:
First floor steel platform is built the scaffolding service platform that more than two layers steel structure truss are installed;
Step 4, two layers of steel structure truss are installed:
1. inner side column is installed: utilize scaffolding service platform, respectively fixedly mounts 1 root post with bolt respectively, as inner side column on the girder of the first floor each inner side;
2. two layers of inner side erection of main beam: respectively fixedly mount 1 two layers inner side girder with bolt respectively between each inner side column and the corresponding steel corbel being arranged on building body steel reinforced concrete structure; Inner side web member completion between the first floor and two layers is installed complete simultaneously;
3. two layers of outside erection of main beam: respectively fixedly mount 1 root post with bolt respectively on the girder of the first floor each outside, as outside column; 1 two layers outside girder are respectively fixedly mounted with bolt respectively between each outside column and corresponding inner side column;
4. outside web member is installed: fixedly mount outside web member one by one with bolt between the outside girder at the first floor and the outside girder at two layers;
5. two level beams are installed: fixedly mount secondary beam between two layers of inner side girder and two layers of outside girder;
Step 5, install with the steel structure truss on upper strata for three layers and three layers:
Adopt such as the method for step 4, utilize scaffolding service platform three layers and three layers to be successively installed with the steel structure truss on upper strata, until the whole installation of structure;
Step 6, remove and off-set facility is installed:
First remove and build the scaffolding service platform on first floor steel platform; And then remove each Eight characters wireline pull bar one by one; The component removed utilizes carriage vertically tower crane to be transported to ground.
CN201511025654.0A 2015-12-30 2015-12-30 Superelevation overhanging steel structure truss support free construction method Active CN105625732B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106337564A (en) * 2016-08-30 2017-01-18 上海二十冶建设有限公司 Unstayed construction method for high-altitude oversized cantilever steel structure
CN110735478A (en) * 2019-10-28 2020-01-31 盐城工学院 fabricated concrete truss building structure

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106337564A (en) * 2016-08-30 2017-01-18 上海二十冶建设有限公司 Unstayed construction method for high-altitude oversized cantilever steel structure
CN110735478A (en) * 2019-10-28 2020-01-31 盐城工学院 fabricated concrete truss building structure
CN110735478B (en) * 2019-10-28 2021-04-30 盐城工学院 Assembled concrete truss building structure

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