CN114108825B - Large-span single-span conversion truss installation method - Google Patents
Large-span single-span conversion truss installation method Download PDFInfo
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- CN114108825B CN114108825B CN202111442772.7A CN202111442772A CN114108825B CN 114108825 B CN114108825 B CN 114108825B CN 202111442772 A CN202111442772 A CN 202111442772A CN 114108825 B CN114108825 B CN 114108825B
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- conversion truss
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 103
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000009434 installation Methods 0.000 title abstract description 20
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 51
- 239000010959 steel Substances 0.000 claims abstract description 51
- 230000007704 transition Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 description 13
- 238000005452 bending Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/342—Structures covering a large free area, whether open-sided or not, e.g. hangars, halls
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/35—Extraordinary methods of construction, e.g. lift-slab, jack-block
Abstract
The invention discloses a method for installing a large-span single-span conversion truss, which comprises the following steps: s1, installing steel columns on two sides; s2, mounting support plates on steel columns on two sides; s3, hoisting the conversion truss to the designed elevation by using a cantilever, and erecting the conversion truss on the inner sides of the two steel columns; when the conversion truss is erected, a mode of erecting the conversion truss from the two ends of the conversion truss to the middle is adopted, first, a first part of the two ends of the conversion truss is erected on each steel column, meanwhile, a counterweight is placed at one end, close to the steel column, of each supporting plate, and the counterweight is matched with the weight of the first part of the conversion truss; setting up the part of the conversion truss except for the folding section; each time a part of conversion truss is erected, the counterweight is slid in a direction away from the steel column; s4, erecting a folding section of the conversion truss; s5, removing the balance weight and the supporting plate. The embodiment enables the conversion truss to be suitable for installation under complex installation conditions, ensures personnel safety and installation quality of buildings, and has certain safety.
Description
Technical Field
The invention relates to a truss installation method, in particular to a large-span single-span conversion truss installation method.
Background
The steel structure conversion truss is a novel conversion structure, and has the advantages of uniform stress, good anti-seismic performance, high steel strength, light weight, high construction speed, economy, practicability, environment friendliness and the like, and can meet larger space requirements. Steel structure conversion trusses are widely used in some modern large-scale construction projects.
In the prior art, the conversion truss is usually installed in situ at high altitude, namely temporary supporting measures are erected below the truss, hoisting equipment is used for segmented hoisting, and the temporary supporting measures are unloaded and removed after hoisting and welding are completed. For the conversion truss of the large-span building, a large number of temporary supporting measures are required to be erected, the cost of erecting materials is high, and the workload of erecting is high; the construction method is only suitable for the situation that enough space and temporary supporting measures are set up under the truss, is not suitable for the situation that temporary supporting measures are set up under the truss in an unconditional mode, and is high in limitation.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides a large-span single-span conversion truss installation method which can be used for erecting a conversion truss under the condition that the space below the conversion truss is insufficient.
The method for installing the large-span single-span conversion truss comprises the following steps:
s1, installing steel columns on two sides;
s2, mounting support plates on the back sides of the steel columns on the two sides relative to the side where the conversion truss is located;
s3, hoisting the conversion truss to a designed elevation by using a cantilever, and erecting the conversion truss on the inner sides of the two steel columns; when the conversion truss is erected, a mode of erecting the conversion truss from the two ends of the conversion truss to the middle is adopted, first, a first part of the two ends of the conversion truss is erected on each steel column, meanwhile, a counterweight is placed at one end, close to the steel column, of each supporting plate, and the counterweight is matched with the weight of the first part of the conversion truss; setting up the part of the conversion truss except for the folding section; sliding the counterweight in a direction away from the steel column while erecting a portion of the conversion truss;
s4, erecting a folding section of the conversion truss;
s5, detaching the counterweight and the supporting plate.
The method for installing the large-span single-span conversion truss has at least the following technical effects: in the embodiment, a cantilever construction method is adopted to set up a conversion truss, so that temporary supporting measures are avoided being set up under the conversion truss; because of setting up a part of conversion truss each time, the bending moment to the steel column can be increased, in order to ensure the safety of the steel column in the cantilever construction process, the invention adopts a method for balancing the bending moment at two sides of the steel column. And (3) lifting the counterweight of corresponding weight on the supporting plate while installing the conversion truss of the first part, and moving the counterweight towards the direction far away from the steel column every time when adding the conversion truss of a part, so that the stress on two sides of the steel column is balanced, and the bending moment sum of the conversion truss and the counterweight to the top end of the steel column is ensured to be close to zero. The invention can avoid the deformation or even the tilting of the steel column to a certain extent, so that the conversion truss can be suitable for installation under complex installation conditions, can ensure personnel safety and the installation quality of the building, and has certain safety.
According to some embodiments of the invention, in S3, the conversion truss is divided into a plurality of sections in the span direction, and then each section of the conversion truss is hoisted by the cantilever to be erected.
According to some embodiments of the invention, the conversion truss is divided into segments in units of one truss.
According to some embodiments of the invention, the lower chord, the straight web member, the diagonal web member, and the upper chord of each of the conversion trusses are integrally assembled at a factory.
According to some embodiments of the invention, in S3, the erection of the conversion truss is performed simultaneously on the steel columns on both sides.
According to some embodiments of the invention, in S1, an embedded bar is arranged at the bottom of the steel column, and the embedded bar is embedded in the field before the steel column is poured.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a flow chart of a method of installing a large span single span transition truss of the present invention;
FIG. 2 is a schematic view of a first state of the installation structure of the large-span single-span conversion truss in the construction of the conversion truss;
FIG. 3 is a schematic view of a state of the large-span single-span conversion truss installation method of the present invention when the first truss of the conversion truss is erected;
fig. 4 is a schematic view of a state when a third truss of the conversion truss is erected by applying the installation method of the large-span single-span conversion truss of the present invention;
FIG. 5 is a schematic view of a state of a closure segment of a conversion truss set up using the method of installing a large span single span conversion truss of the present invention;
FIG. 6 is a schematic diagram of the installation method of the large-span single-span conversion truss of the present invention when the erection is completed;
reference numerals: 101. converting the truss; 102. a steel column; 103. a support plate; 104. a counterweight; 105. a first truss; 106. the third truss; 107. and folding the section.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and to simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1 to 6, an embodiment of the present invention provides a method for installing a large-span single-span conversion truss, including:
s1, installing steel columns 102 on two sides;
s2, mounting support plates 103 on the back sides of the steel columns 102 on the two sides relative to the side where the conversion truss 101 is located;
s3, hoisting the conversion truss 101 to a designed elevation by using a cantilever, and erecting the conversion truss 101 on the inner sides of the two steel columns 102; when the conversion truss 101 is erected, a mode of erecting from two ends of the conversion truss 101 to the middle is adopted, first parts of two ends of the conversion truss 101 are erected on each steel column 102, meanwhile, a counterweight 104 is placed at one end, close to the steel column 102, of each supporting plate 103, and the counterweight 104 is matched with the weight of the first parts of the conversion truss 101; erecting a part of the conversion truss 101 except for the folding section 107; sliding the counterweight 104 in a direction away from the steel column 102 while setting up the partial conversion truss 101;
s4, erecting a folding section 107 of the conversion truss 101;
and S5, removing the counterweight 104 and the support plate 103.
The method for installing the large-span single-span conversion truss has at least the following technical effects: in the embodiment, the conversion truss 101 is erected by adopting a cantilever construction method, so that temporary supporting measures are avoided being erected under the conversion truss 101; because of the fact that each part of conversion truss 101 is erected, bending moment to the steel column 102 is increased, in order to ensure safety of the steel column 102 in the cantilever construction process, the method for balancing bending moment on two sides of the steel column 102 is adopted. The counterweight 104 with corresponding weight is hoisted on the supporting plate 103 while the first part of conversion truss 101 is installed, and each part of conversion truss 101 is additionally arranged, the counterweight 104 is moved towards the direction away from the steel column 102, so that the stress on two sides of the steel column 102 is balanced, and the bending moment sum of the conversion truss 101 and the counterweight 104 to the top end of the steel column 102 is ensured to be close to zero. The invention can avoid the deformation and even the tilting of the steel column 102 to a certain extent, so that the conversion truss 101 can be suitable for installation under complex installation conditions, can ensure personnel safety and the installation quality of buildings, and has certain safety.
In some embodiments of the present invention, in S3, the conversion truss 101 is first divided into several sections in the span direction, and then each section of conversion truss 101 is lifted by a cantilever to be erected. Referring to fig. 4, an arrow above the conversion truss 101 indicates the setting direction of the conversion truss 101, and an arrow above the counterweight 104 indicates the sliding direction of the counterweight 104.
In some embodiments of the present invention, the conversion truss 101 is divided into several sections by taking one truss as a unit, and after the first truss 105, the second truss and the third truss 106 are installed in sequence in combination with fig. 3 to 5, the closed sections 107 are installed, so as to improve the site construction progress.
In some embodiments of the present invention, the lower chord, the straight web member, the diagonal web member, and the upper chord of each conversion truss 101 are integrally assembled at a factory. It will be appreciated that the installation of each truss frame 101 can reduce the construction process of site installation and improve the construction progress after the factory operation.
In some embodiments of the present invention, in S3, the erection of the conversion truss 101 is performed simultaneously for the steel columns 102 on both sides. And the construction progress is ensured, and the construction efficiency is improved.
In some embodiments of the present invention, in S1, the bottom of the steel column 102 is provided with the embedded bars, and the embedded bars are embedded in the field before the steel column 102 is poured, so that the stability of the building can be improved.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (5)
1. A method of installing a large span single span transition truss comprising:
s1, installing steel columns on two sides, wherein embedded bars are arranged at the bottoms of the steel columns, and the embedded bars are embedded in site before the steel columns are poured;
s2, mounting support plates on the back sides of the steel columns on the two sides relative to the side where the conversion truss is located;
s3, hoisting the conversion truss to a designed elevation by using a cantilever, and erecting the conversion truss on the inner sides of the two steel columns; when the conversion truss is erected, a mode of erecting the conversion truss from the two ends of the conversion truss to the middle is adopted, first, a first part of the two ends of the conversion truss is erected on each steel column, meanwhile, a counterweight is placed at one end, close to the steel column, of each supporting plate, and the counterweight is matched with the weight of the first part of the conversion truss; setting up the part of the conversion truss except for the folding section; sliding the counterweight in a direction away from the steel column while erecting a portion of the conversion truss;
s4, erecting a folding section of the conversion truss;
s5, detaching the counterweight and the supporting plate.
2. The method for installing a large-span single-span conversion truss according to claim 1, wherein: in S3, the conversion truss is divided into a plurality of sections in the span direction, and then each section of the conversion truss is hoisted by the cantilever to be erected.
3. The method for installing a large-span single-span conversion truss according to claim 2, wherein: the conversion truss is divided into a plurality of sections by taking a truss as a unit.
4. The method for installing a large-span single-span conversion truss according to claim 3, wherein: and integrally assembling the lower chord member, the straight web member, the inclined web member and the upper chord member of each conversion truss in a factory.
5. The method for installing a large-span single-span conversion truss according to claim 1, wherein: in S3, the steel columns on both sides are simultaneously erected with the conversion truss.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111442772.7A CN114108825B (en) | 2021-11-30 | 2021-11-30 | Large-span single-span conversion truss installation method |
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| CN202111442772.7A CN114108825B (en) | 2021-11-30 | 2021-11-30 | Large-span single-span conversion truss installation method |
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| JP2005171638A (en) * | 2003-12-11 | 2005-06-30 | Oriental Construction Co Ltd | Displacement adjusting method in overhanging installing construction method for concrete girder |
| CN105604334B (en) * | 2016-01-18 | 2019-04-23 | 中铁三局集团有限公司 | A kind of rapid constructing method for large span steel truss integral installation |
| CN106012824A (en) * | 2016-07-26 | 2016-10-12 | 交通运输部科学研究院 | Movable bridge anti-collision guardrail construction operation trolley |
| CN107100309B (en) * | 2017-06-26 | 2019-03-12 | 福建省闽南建筑工程有限公司 | A kind of construction method for the large-scale multi-angular cantilever frame of integral hoisting |
| CN110004832B (en) * | 2019-04-09 | 2024-03-05 | 宁波市政工程建设集团股份有限公司 | Large-span cantilever truss type bent cap bracket system and construction method |
| CN111395180A (en) * | 2020-03-27 | 2020-07-10 | 中交二公局东萌工程有限公司 | Continuous rigid frame bridge side span cast-in-place section and closure section suspension type construction method |
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Address after: No.1908, Zhongtian Meijing building, No.2009, Pingshan Avenue, Liulian community, Pingshan street, Pingshan District, Shenzhen, Guangdong 518000 Patentee after: China Construction Steel Structure Co.,Ltd. Address before: No.1908, Zhongtian Meijing building, No.2009, Pingshan Avenue, Liulian community, Pingshan street, Pingshan District, Shenzhen, Guangdong 518000 Patentee before: China Construction Steel Engineering Co.,Ltd. |