CN114108825A - Installation method of large-span single-span conversion truss - Google Patents
Installation method of large-span single-span conversion truss Download PDFInfo
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- CN114108825A CN114108825A CN202111442772.7A CN202111442772A CN114108825A CN 114108825 A CN114108825 A CN 114108825A CN 202111442772 A CN202111442772 A CN 202111442772A CN 114108825 A CN114108825 A CN 114108825A
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- truss
- span
- conversion
- conversion truss
- erected
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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, mounting steel columns on two sides; s2, mounting support plates on the steel columns on the two sides; 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 from two ends to the middle of the conversion truss, first parts of the two ends of the conversion truss are erected on each steel column, meanwhile, a balance weight is placed at one end, close to the steel column, of each supporting plate, and the balance weight is matched with the weight of the first parts of the conversion truss; building the part of the conversion truss except the folding section; sliding the balance weight in the direction far away from the steel column when part of the conversion truss is erected; s4, setting up a folding section of the conversion truss; and S5, removing the counterweight and the supporting plate. The embodiment enables the conversion truss to be suitable for installation under complex installation conditions, can ensure the installation quality of personnel safety and 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 the structure has the advantages of uniform stress, very good anti-seismic performance, high steel strength, light weight, high construction speed, economy, practicality, environmental protection and the like, and can meet the requirement of larger space. The steel structure conversion truss is widely applied to some modern large-scale building engineering.
In the prior art, the conversion truss is usually installed in situ at high altitude, namely, a temporary support measure is built below the truss, the truss is hoisted in sections by adopting hoisting equipment, and the temporary support measure is removed after hoisting and welding are finished. For the conversion truss of the large-span building, a large number of temporary support measures need to be set up, the cost of setting up materials is high, and the setting up workload is large; the construction method is only suitable for the condition that enough space and conditions are provided below the truss for building the temporary supporting measures, is not suitable for unconditionally building the temporary supporting measures below the truss, and has strong limitation.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a method for installing a large-span single-span conversion truss, which can be used for erecting the conversion truss under the condition that the space below the conversion truss is insufficient.
The installation method of the large-span single-span conversion truss provided by the embodiment of the invention comprises the following steps:
s1, mounting steel columns on two sides;
s2, mounting support plates on the back sides of the steel columns on the two sides relative to the sides of the transfer truss;
s3, after the transfer truss is hoisted to a designed elevation by using a cantilever, the transfer truss is erected on the inner sides of the two steel columns; when the conversion truss is erected from two ends to the middle of the conversion truss, first parts of the two ends of the conversion truss are erected on each steel column, meanwhile, a balance weight is placed at one end, close to the steel column, of each supporting plate, and the balance weight is matched with the weight of the first part of the conversion truss; building the part of the conversion truss except the folding section; sliding the counter weight in a direction away from the steel column while erecting each part of the conversion truss;
s4, setting up a folding section of the conversion truss;
s5, removing the counterweight and the supporting plate.
The installation method of the large-span single-span conversion truss provided by the embodiment of the invention at least has the following technical effects: in the embodiment, the transition truss is erected by adopting a cantilever construction method, so that a temporary support measure is avoided being erected under the transition truss; because the bending moment of the steel column is increased every time a part of the transfer truss is erected, 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 of the two sides of the steel column. When the first part of the conversion truss is installed, the balance weight with the corresponding weight is hoisted on the supporting plate, and when the first part of the conversion truss is additionally arranged, the balance weight moves towards the direction far away from the steel column, so that the stress on two sides of the steel column is balanced, and the bending moment sum of the conversion truss and the balance weight on the top end of the steel column is ensured to be close to zero. The invention can avoid the deformation and even toppling condition of the steel column to a certain extent, so that the conversion truss can be suitable for installation under complex installation conditions, the safety of personnel and the installation quality of buildings can be ensured, and certain safety is achieved.
According to some embodiments of the invention, in S3, the transfer truss is first divided into several segments in the span direction, and then each segment of the transfer truss is hoisted by the cantilever to be erected.
According to some embodiments of the present invention, the conversion truss is divided into several sections in a unit of one truss.
According to some embodiments of the invention, the lower chord, the straight web members, the diagonal web members and the upper chord of each of the converted trusses are integrally assembled at a factory.
According to some embodiments of the invention, the erection of the transfer truss is performed simultaneously on the steel columns of both sides at S3.
According to some embodiments of the present invention, at S1, embedded steel bars are disposed at the bottom of the steel column, and the embedded steel bars are embedded in the site 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 above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a flow chart of a method for installing a large-span single-span transition truss according to the present invention;
FIG. 2 is a schematic view of a first state of a transition truss erected using the installation structure of the long-span single-span transition truss of the present invention;
FIG. 3 is a schematic view of a state when the first truss of the transition truss is erected by applying the installation method of the large-span single-span transition truss of the invention;
FIG. 4 is a schematic view of a third truss built by applying the installation method of the large-span single-span transition truss of the present invention;
FIG. 5 is a schematic diagram of a state of setting up a closure segment of a transition truss by applying the installation method of the large-span single-span transition truss of the invention;
FIG. 6 is a schematic diagram of a completed erection using the method of the present invention for installing a large-span single-span transition truss;
reference numerals: 101. converting the truss; 102. a steel column; 103. a support plate; 104. balancing weight; 105. a first pin; 106. a third truss; 107. and (5) closing the sections.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to 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", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled 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 transition truss, including:
s1, mounting steel columns 102 on two sides;
s2, mounting support plates 103 on the back sides of the steel columns 102 on both sides with respect to the side where the transfer truss 101 is located;
s3, hoisting the transfer truss 101 to a designed elevation by using a cantilever, and erecting the transfer truss 101 on the inner sides of two steel columns 102; when the transfer truss 101 is erected from two ends to the middle of the transfer truss 101, first parts of the two ends of the transfer 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 part of the transfer truss 101; building the part of the transfer truss 101 except the folding section 107; sliding the counterweight 104 in a direction away from the steel column 102 while erecting the partial transfer truss 101;
s4, setting up a folding section 107 of the transfer truss 101;
s5, removing the weight 104 and the support plate 103.
The installation method of the large-span single-span conversion truss provided by the embodiment of the invention at least has the following technical effects: in the embodiment, the conversion truss 101 is erected by adopting a cantilever construction method, so that a temporary support measure is avoided being erected under the conversion truss 101; because the bending moment to the steel column 102 is increased every time a part of the transfer truss 101 is erected, in order to ensure the safety of the steel column 102 in the cantilever construction process, the invention adopts a method for balancing the bending moments at two sides of the steel column 102. When the first part of the conversion truss 101 is installed, the counterweight 104 with the corresponding weight is hoisted on the support plate 103, and when a part of the conversion truss 101 is additionally arranged, the counterweight 104 moves towards the direction far away from the steel column 102, so that the stress on two sides of the steel column 102 is balanced, and the sum of the bending moment of the conversion truss 101 and the counterweight 104 on the top end of the steel column 102 is ensured to be close to zero. The invention can avoid the deformation and even toppling of the steel column 102 to a certain extent, so that the conversion truss 101 can be suitable for installation under complex installation conditions, and the safety of personnel and the installation quality of buildings can be ensured, thereby having certain safety.
In some embodiments of the present invention, in S3, the transfer truss 101 is first divided into several segments in the span direction, and then each segment of the transfer truss 101 is hoisted by using the cantilever to be erected. Referring to fig. 4, an arrow above the transfer truss 101 indicates a setting direction of the transfer truss 101, and an arrow above the counterweight 104 indicates a sliding direction of the counterweight 104.
In some embodiments of the present invention, the conversion truss 101 is divided into several sections in units of one truss, and the first truss 105, the second truss and the third truss 106 are sequentially installed and then the closing section 107 is installed in combination with fig. 3 to 5, thereby improving the on-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 member of each converted truss 101 are integrally assembled in a factory. It can be understood that the installation work of each converted truss 101 is performed in a factory, so that the construction process of field installation can be reduced, and the construction progress can be improved.
In some embodiments of the present invention, in S3, the erection of the transfer truss 101 is performed simultaneously for the steel columns 102 on both sides. The construction progress is guaranteed, and the construction efficiency is improved.
In some embodiments of the present invention, in S1, embedded steel bars are disposed at the bottom of the steel column 102, and the embedded steel bars are embedded in the site before the steel column 102 is poured, so as to improve the stability of the building.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean 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, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. 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 invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (6)
1. A method for installing a large-span single-span conversion truss is characterized by comprising the following steps:
s1, mounting steel columns on two sides;
s2, mounting support plates on the back sides of the steel columns on the two sides relative to the sides of the transfer truss;
s3, after the transfer truss is hoisted to a designed elevation by using a cantilever, the transfer truss is erected on the inner sides of the two steel columns; when the conversion truss is erected from two ends to the middle of the conversion truss, first parts of the two ends of the conversion truss are erected on each steel column, meanwhile, a balance weight is placed at one end, close to the steel column, of each supporting plate, and the balance weight is matched with the weight of the first part of the conversion truss; building the part of the conversion truss except the folding section; sliding the counter weight in a direction away from the steel column while erecting each part of the conversion truss;
s4, setting up a folding section of the conversion truss;
s5, removing the counterweight and the supporting plate.
2. The method for installing the large-span single-span conversion truss of claim 1, wherein the method comprises the following steps: in S3, the transfer truss is first divided into several sections in the span direction, and then each section of the transfer truss is hoisted by the cantilever to be erected.
3. The method for installing a large-span single-span transfer truss of claim 2, wherein: the conversion truss is divided into a plurality of sections by taking one truss as a unit.
4. The large-span single-span conversion truss installation method of claim 3, wherein: and integrally assembling the lower chord member, the straight web members, the inclined web members and the upper chord member of each truss in a factory.
5. The method for installing the large-span single-span conversion truss of claim 1, wherein the method comprises the following steps: in S3, the steel columns on both sides are simultaneously erected to form the transfer truss.
6. The method for installing the large-span single-span conversion truss of claim 1, wherein the method comprises the following steps: in S1, pre-buried steel bars are arranged at the bottom of the steel column, and the pre-buried steel bars are pre-buried on site before the steel column is poured.
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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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| CN114108825A true CN114108825A (en) | 2022-03-01 |
| CN114108825B CN114108825B (en) | 2023-06-30 |
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Citations (6)
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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 |
| CN105604334A (en) * | 2016-01-18 | 2016-05-25 | 中铁三局集团有限公司 | Rapid-construction method used for overall installation of large-span steel truss |
| 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 |
| CN107100309A (en) * | 2017-06-26 | 2017-08-29 | 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 |
| CN110004832A (en) * | 2019-04-09 | 2019-07-12 | 宁波市政工程建设集团股份有限公司 | Long span cantilever truss formula bent cap strutting 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 |
-
2021
- 2021-11-30 CN CN202111442772.7A patent/CN114108825B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005171638A (en) * | 2003-12-11 | 2005-06-30 | Oriental Construction Co Ltd | Displacement adjusting method in overhanging installing construction method for concrete girder |
| CN105604334A (en) * | 2016-01-18 | 2016-05-25 | 中铁三局集团有限公司 | Rapid-construction method used for overall installation of large-span steel truss |
| 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 |
| CN107100309A (en) * | 2017-06-26 | 2017-08-29 | 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 |
| CN110004832A (en) * | 2019-04-09 | 2019-07-12 | 宁波市政工程建设集团股份有限公司 | Long span cantilever truss formula bent cap strutting 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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| CN114108825B (en) | 2023-06-30 |
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