CN113513174A - Inverse installation method for steel truss hanging type structure - Google Patents
Inverse installation method for steel truss hanging type structure Download PDFInfo
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- CN113513174A CN113513174A CN202110459825.XA CN202110459825A CN113513174A CN 113513174 A CN113513174 A CN 113513174A CN 202110459825 A CN202110459825 A CN 202110459825A CN 113513174 A CN113513174 A CN 113513174A
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- steel truss
- hanging
- supporting
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention discloses a reverse installation method of a steel truss hanging type structure, which comprises the following steps: s1, installing a temporary supporting system; s2, mounting a hanging structure on the temporary support system; s3, installing a main structure on the periphery of the steel truss above the hanging structure; s4, arranging temporary supports required for installation on the hanging structure according to design requirements and construction calculation results; s5, installing a steel truss structure; s6, unloading the steel truss and the hanging structure; and S7, removing the temporary support system, wherein the removing sequence is the same as the unloading sequence. The invention realizes the inverse installation of the hanging structure, does not need to wait for the construction restriction of the installation of the steel truss, firstly establishes a temporary support system in one step to complete the installation of the hanging structure, and completes the installation of the steel truss through the hanging structure and the temporary support.
Description
Technical Field
The invention relates to the technical field of installation of steel truss hanging structures, in particular to a reverse installation method of a steel truss hanging structure.
Background
Along with the development of the building field in China, the change of the building structure form is changed day by day, and in a large-space steel structure, when a hanging type steel structure appears, great construction difficulty is brought to the site. Installation of steel truss suspended structure, the conventionality is many after constructing upper portion major structure earlier, installs the continuous construction order of suspended structure again, and it faces following construction problem: the steel truss hanging type structure is difficult to construct, installation precision and deflection control are difficult, the rear-mounted hanging structure influences the downward deflection deformation of the upper steel truss, construction progress is slow, and construction safety risk is high.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide a reverse installation method of a steel truss hanging type structure, which can solve the problems in the prior art.
In order to achieve the aim, the invention provides a reverse installation method of a steel truss hanging type structure, which comprises the following steps:
s1, installing a temporary support system;
s2, mounting a hanging structure on the temporary support system;
s3, mounting a main body structure on the periphery of the steel truss above the hanging structure;
s4, setting temporary supports required by installation on the hanging structure according to the design requirements and the construction calculation results;
s5, installing a steel truss structure;
s6, unloading the steel truss and the hanging structure; and
and S7, removing the temporary support system, wherein the removing sequence is the same as the unloading sequence.
In a preferred embodiment, the hanging structure is installed before the steel truss by adopting a sectional type high-altitude in-situ installation construction method through a temporary support system, wherein the temporary support system comprises a track support, a transition cross beam, a main support point, a secondary support point and a tie bar, and the hanging structure comprises a hanging upright post and a hanging cross beam.
In a preferred embodiment, the step of installing the temporary support system in step S1 includes the steps of: the method comprises the steps that a supporting embedded part is arranged before concrete pouring of a lower floor slab of a hanging structure, after pouring is completed and installation conditions are met and the position is determined through measuring and paying off, a track support is installed on the supporting embedded part, a supporting bottom plate of the track support is tightly attached to the embedded plate of the supporting embedded part, if gaps exist, steel plate strips are used for filling the inner gaps, the supporting bottom plate is filled along the periphery of the supporting bottom plate, and an L-shaped steel plate is adopted for fixing a track supporting bottom foot.
In a preferred embodiment, eight fixing plates are used for reinforcing the track support feet of each track support, and the supporting embedded parts and the fixing plates are fillet welding joints attached to two sides.
In a preferred embodiment, the step S1 of installing the temporary support system further comprises the steps of: the transition cross beam is arranged at the top of the track support and is connected with a flange steel plate at the top of the track support in a welding mode, after the elevation position is adjusted, the transition cross beam is connected into a whole through a tie rod, and then a supporting point is arranged on the transition cross beam.
In a preferred embodiment, the supporting points comprise main supporting points and secondary supporting points, wherein the main supporting points are arranged at the supporting positions of the vertical hanging structures and are assembled and welded into a rectangular square box by adopting steel plates, three reinforcing vertical plates are arranged in each direction outside the square box, two steel plates are butt-welded at two sides of the upper flange of the transition beam below the position of the main supporting points, and three oblique stiffening ribs are respectively arranged at two sides of a web plate; the secondary supporting point is arranged under the horizontal hanging structure and welded with the transition beam, and a transition beam stiffening rib is additionally arranged on a transition beam web plate under the secondary supporting point.
In a preferred embodiment, the steel truss includes a steel truss lower chord, a steel truss straight web member, a steel truss diagonal web member and a steel truss upper chord, and the step of installing the steel truss structure in S5 includes the following steps: mounting a middle steel truss lower chord; installing steel truss lower chords towards two sides; mounting a steel truss straight web member; installing the upper chord of the steel truss and the connecting beam between the trusses; and installing the truss diagonal web members.
In a preferred embodiment, before the lower chord of the steel truss is installed, temporary rail supports required for installation are arranged on the hanging structure, the steel truss above the hanging structure is pre-arched, the rail support feet are welded with the hanging structure, and secondary support points of the hanging structure are arranged at the top of the rail supports for unloading the steel truss.
In a preferred embodiment, the construction method for the hanging structure by adopting the sectional type high-altitude in-situ installation comprises the following steps: the hanging structure is sequentially installed from the middle to two sides, a hanging beam connected with the main structure is installed firstly, then a hanging stand column is installed, then the hanging beam connected with the main structure is installed on the other side to form a whole, the hanging stand column is pulled to be provided with a wind rope during installation, and after installation and adjustment of the hanging beam are completed, assembly welding is completed at high altitude.
In a preferred embodiment, the unloading step S6 includes the following steps: and after the steel truss and the hoisting structure are completely installed and welded and the upper load of the steel truss is applied, unloading the steel truss and the hoisting structure layer by layer from top to bottom according to the sequence of firstly unloading the steel truss and then unloading the hoisting structure, wherein the steel truss is unloaded integrally, the temporary supporting point on the hoisting structure is synchronously cut off, the track supporting last-time supporting point is cut off at the speed of 10mm each time until the temporary supporting system is completely separated from the structure, the hoisting structure is unloaded from the middle to the two ends in sequence, and the main supporting point and the secondary supporting point on the transition beam are cut off at the speed of 10mm each time.
Compared with the prior art, the inverse installation method of the steel truss hanging type structure has the following beneficial effects: the hanging structure and the steel truss construction both adopt a sectional type high-altitude in-situ installation method, the conventional construction sequence is changed through the temporary support system, the reverse installation of the hanging structure is realized, the construction limitation of the steel truss installation is not required to be waited, the temporary support system is established in one step firstly, the installation of the hanging structure is completed, and the installation of the steel truss is completed through the hanging structure and the temporary support. Compared with the conventional construction sequence, the reverse-sequence construction of the steel truss suspended structure has lower technical difficulty, is beneficial to the control of the installation precision and deflection deformation of the suspended structure, and simultaneously lightens the construction load influence of the upper part connected steel truss structure; the reverse installation of the steel truss hanging structure greatly shortens the original construction period and avoids the safety risk of the after-installation of the conventional hanging structure.
Drawings
Fig. 1 is a schematic elevation view of a steel truss hanging structure and a temporary supporting system according to a preferred embodiment of the present invention.
Fig. 2 is a schematic side elevation view of a steel truss hanging structure and a temporary support system according to a preferred embodiment of the present invention.
Figure 3 is a schematic elevational view of the track support foot attachment of the preferred embodiment of the present invention.
Figure 4 is a schematic plan view of the track support foot attachment of the preferred embodiment of the present invention.
Fig. 5 is a schematic elevational view of a support point in accordance with a preferred embodiment of the present invention.
FIG. 6 is a schematic side elevational view of a preferred embodiment of the support point of the present invention.
Fig. 7 is a flow chart of a method for inversely installing a steel truss hanging type structure according to a preferred embodiment of the present invention.
Description of reference numerals:
1-hanging upright columns; 2-hanging the beam; 3-steel truss bottom chord; 4-steel truss straight web members; 5-steel truss diagonal web members; 6-steel truss upper chord; 7-rail support; 8-a transition beam; 9-main support point; 10-secondary support points; 11-a tie bar; 12-supporting the embedment; 13-flanged steel plate; 14-transition beam stiffener; 15-reinforcing plate.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
As shown in fig. 1 to 7, the inverse installation method of a steel truss hanging type structure according to a preferred embodiment of the present invention comprises the steps of:
step S1: a temporary support system is installed, which comprises the rail supports 7, the transition beams 8, the support points and the tie bars 11.
Specifically, as shown in fig. 3-4, a supporting embedded part 12 with a specification of-20 × 900 × 900mm is arranged before concrete pouring of a lower floor slab of a hanging structure, after pouring is completed and installation conditions are met and determined by measuring and paying off, a track support 7 is arranged on the supporting embedded part 12, the track support 7 is a steel pipe with a thickness of 609-620 mm, the wall thickness is 16-18 mm, upper and lower bolts are connected with flange steel plates 13 with a thickness of 20mm, the surface of the embedded part 12 supported by feet of the track support 7 is smooth, a supporting bottom plate is tightly attached to the embedded plate and is dense, if gaps exist, steel plate strips are used for filling up the inner gaps, and the supporting bottom plate is padded tightly along the periphery of the supporting bottom plate. Then, the feet of the track supports 7 are fixed by using L-shaped steel plates, eight fixing plates 15 are used for reinforcing the feet of each track support 7, the specification of each fixing plate 15 is 20 multiplied by 100 multiplied by 130mm, the supporting embedded parts 12 and the fixing plates 15 are fillet welds with two sides, and the height of each weld is 10 mm.
Furthermore, the transition beam 8 is arranged at the top of the track support 7, the section steel with the specification of HW400 multiplied by 400 is connected with a flange steel plate 13 with the thickness of 20mm at the top of the track support 7 in a welding way, after the elevation position is adjusted, the transition beam 8 is connected into a whole by using a tie bar 11 with the diameter phi of 133x4mm, and then a supporting point is arranged on the transition beam 8.
As shown in fig. 5-6, the main supporting point 9 is set at the supporting position of the vertical hanging structure, 20mm thick steel plates are welded to form an 800 × 800mm square box, three 20mm thick reinforced vertical plates are set in each direction outside the square box, at the same time, two-20 × 300 × 1000mm steel plates are butt-welded at both sides of the upper flange of the transition beam 8 under the position of the main supporting point 9, and three oblique stiffening ribs are set at both sides of the web, the secondary supporting point 10 is set under the horizontal hanging structure, and is welded with the transition beam 8 by a phi 400 × 16mm round tube, and the transition beam stiffening rib 14 is added at the web of the transition beam 8 under the secondary supporting point 10.
Step S2: and a hanging structure is arranged on the temporary support system, and the construction of the hanging structure adopts a construction method of sectional high-altitude in-situ installation. The whole body is sequentially installed from the middle part to two sides, the hanging beam 2 connected with the main structure is installed firstly, the hanging upright post 1 is installed, then the hanging beam 2 connected with the main structure is installed at the other side to form the whole body, the hanging upright post 1 is pulled to be provided with a wind rope during installation, and after the installation and adjustment of the beam are completed, the assembly welding is completed at high altitude.
Step S3: and installing a main body structure on the periphery of the steel truss above the hanging structure.
Step S4: and arranging temporary supports required by installation on the hanging structure according to design requirements and construction calculation results.
Step S5: and (5) installing a steel truss structure. The construction sequence is that the lower chord 3 of the middle steel truss is installed → the lower chord 3 of the steel truss installed to the two sides → the straight web member 4 of the steel truss is installed → the upper chord 6 of the steel truss and the connecting beam between the trusses are installed → the diagonal web member 5 of the truss is installed.
Further, before the lower chord 3 of the steel truss is installed, temporary supports required for installation are arranged on the hanging structure, the steel truss above the hanging structure is pre-arched, the temporary supports also adopt rail supports 7, the bottom feet of the rail supports are welded with the hanging structure, and secondary support points 10 of the hanging structure are arranged at the top of the rail supports 7 and used for unloading the steel truss.
Step S6: unloading the steel truss and the hanging structure:
and after the steel truss and the hoisting structure are completely installed and welded and the upper load of the steel truss is applied, sequentially unloading the steel truss and the hoisting structure layer by layer from top to bottom, wherein the steel truss is unloaded integrally, the temporary supporting points on the hoisting structure are synchronously removed, the upper supporting point 10 of the rail support 7 is removed at the speed of 10mm each time until the temporary supporting system is completely separated from the structure, the hoisting structure is unloaded sequentially from the middle to the two ends, and the main supporting point 9 and the secondary supporting point 10 on the transition beam 8 are removed at the speed of 10mm each time.
Step S7: and (4) removing the temporary support system in the same removing sequence as the unloading sequence.
The specific working process and principle of the invention are as follows: the hanging structure and the steel truss construction both adopt a sectional type high-altitude in-situ installation method, the conventional construction sequence is changed through the temporary support system, the inverse installation of the hanging structure is realized, the construction limitation of the installation of the steel truss is not required to wait, the temporary support system is established in one step firstly, the installation of the hanging structure is completed, the installation of the steel truss is completed through the hanging structure and the temporary support, the construction period is greatly shortened through the inverse installation, the construction technology difficulty is reduced, the installation precision and the deflection deformation are effectively controlled, the construction safety risk is reduced, and good economic benefits are obtained.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (10)
1. The inverse installation method of the steel truss hanging type structure is characterized by comprising the following steps:
s1, installing a temporary support system;
s2, mounting a hanging structure on the temporary support system;
s3, mounting a main body structure on the periphery of the steel truss above the hanging structure;
s4, setting temporary supports required by installation on the hanging structure according to design requirements and construction calculation results;
s5, installing a steel truss structure;
s6, unloading the steel truss and the hanging structure; and
and S7, removing the temporary support system, wherein the removing sequence is the same as the unloading sequence.
2. The inverse installation method of the steel truss suspended structure as claimed in claim 1, wherein the suspended structure is installed before the steel truss by adopting a construction method of sectional type high altitude in-situ installation through the temporary support system, wherein the temporary support system comprises a rail support, a transition beam, a main support point, a secondary support point and a tie bar, and the suspended structure comprises a suspended upright and a suspended beam.
3. The method for inversely installing a steel truss suspended structure according to claim 2, wherein the step of installing the temporary support system in step S1 comprises the steps of: the method comprises the steps that a supporting embedded part is arranged before concrete pouring of a lower floor slab of the hanging structure, after the concrete pouring is completed, installation conditions are met, and after the concrete pouring is confirmed through measuring and paying off, a track support is installed on the supporting embedded part, a supporting bottom plate of the track support is tightly attached to the embedded plate of the supporting embedded part, if gaps exist, the inner gaps are filled with steel plate strips, the supporting bottom plate is filled along the periphery of the supporting bottom plate, and an L-shaped steel plate is adopted to fix track supporting bottom feet.
4. The method of claim 3, wherein each of the rail supports is reinforced with eight fixing plates, and the supporting embedded parts and the fixing plates are fillet welds.
5. The method for installing a steel truss suspended structure in reverse direction according to claim 4, wherein the step of installing the temporary support system in step S1 further comprises the steps of: and arranging a transition cross beam at the top of the track support, welding and connecting the transition cross beam with a flange steel plate at the top of the track support, adjusting the elevation position, connecting the transition cross beam into a whole by using a tie rod, and arranging a supporting point on the transition cross beam.
6. The method for inversely installing the steel truss hanging type structure according to claim 5, wherein the supporting points comprise a main supporting point and a secondary supporting point, wherein the main supporting point is arranged at the supporting position of the vertical hanging structure, a rectangular square box is formed by assembling and welding steel plates, three reinforced vertical plates are arranged outside the square box in each direction, two steel plates are butt-welded at two sides of the upper flange of the transition beam under the position of the main supporting point, and three oblique reinforcing ribs are respectively arranged at two sides of the web; the secondary supporting point is arranged under the horizontal hanging structure and welded with the transition beam, and a transition beam stiffening rib is additionally arranged on a transition beam web plate under the secondary supporting point.
7. The method for inversely installing a steel truss suspended structure according to claim 6, wherein the steel truss comprises a steel truss lower chord, a steel truss straight web member, a steel truss diagonal web member and a steel truss upper chord, and the step of installing the steel truss structure in step S5 comprises the steps of: mounting a middle steel truss lower chord; installing steel truss lower chords towards two sides; mounting a steel truss straight web member; installing the upper chord of the steel truss and the connecting beam between the trusses; and installing the truss diagonal web members.
8. The method for inversely installing the steel truss suspended structure according to claim 7, wherein before the lower chord of the steel truss is installed, temporary rail supports required for installation are arranged on the suspended structure, the steel truss is pre-arched above the suspended structure, the rail support feet are welded with the suspended structure, and the top of the rail support is provided with secondary support points of the suspended structure for unloading the steel truss.
9. The inverse installation method of the steel truss suspended structure as claimed in claim 2, wherein the construction method of the suspended structure adopting sectional type high-altitude in-situ installation comprises the following steps: the hanging structure is sequentially installed from the middle to two sides, a hanging beam connected with the main structure is installed firstly, then a hanging stand column is installed, then a hanging beam connected with the main structure is installed on the other side to form a whole, a wind rope is required to be pulled on the hanging stand column during installation, and after installation and adjustment of the hanging beam are completed, assembly welding is completed at high altitude.
10. The method for inversely installing the steel truss suspended structure according to claim 2, wherein the unloading the steel truss and the suspended structure in step S6 comprises the steps of: and after the steel truss and the hoisting structure are completely installed and welded and the upper load of the steel truss is applied, unloading layer by layer from top to bottom according to the sequence of firstly unloading the steel truss and then unloading the hoisting structure, wherein the steel truss is unloaded integrally, the temporary supporting points on the hoisting structure are synchronously removed, the track supporting last-time supporting points are removed at the speed of 10mm each time until the temporary supporting system is completely separated from the structure, the hoisting structure is unloaded from the middle to the two ends in sequence, and the main supporting points and the secondary supporting points on the transition beam are removed at the speed of 10mm each time.
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| CN202110459825.XA CN113513174B (en) | 2021-04-27 | 2021-04-27 | Inverse installation method for steel truss hanging type structure |
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| CN202110459825.XA CN113513174B (en) | 2021-04-27 | 2021-04-27 | Inverse installation method for steel truss hanging type structure |
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| CN113513174B CN113513174B (en) | 2022-04-22 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0489938A (en) * | 1990-08-01 | 1992-03-24 | Tokyu Constr Co Ltd | Liftup device installing method for truss lifting construction method and truss joining method |
| CN103628680A (en) * | 2013-11-15 | 2014-03-12 | 天津三建建筑工程有限公司 | Construction method for large-area steel structure hanging layer |
| CN105780925A (en) * | 2016-04-05 | 2016-07-20 | 中建局钢结构工程有限公司 | Truss-hanging combined system installation construction method |
| CN106836498A (en) * | 2016-12-28 | 2017-06-13 | 郑州工业应用技术学院 | A kind of super-span Stadium roof system steel truss lifting construction engineering method |
-
2021
- 2021-04-27 CN CN202110459825.XA patent/CN113513174B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0489938A (en) * | 1990-08-01 | 1992-03-24 | Tokyu Constr Co Ltd | Liftup device installing method for truss lifting construction method and truss joining method |
| CN103628680A (en) * | 2013-11-15 | 2014-03-12 | 天津三建建筑工程有限公司 | Construction method for large-area steel structure hanging layer |
| CN105780925A (en) * | 2016-04-05 | 2016-07-20 | 中建局钢结构工程有限公司 | Truss-hanging combined system installation construction method |
| CN106836498A (en) * | 2016-12-28 | 2017-06-13 | 郑州工业应用技术学院 | A kind of super-span Stadium roof system steel truss lifting construction engineering method |
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