CN110541365A - Construction method for multi-layer steel truss building - Google Patents
Construction method for multi-layer steel truss building Download PDFInfo
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- CN110541365A CN110541365A CN201910865721.1A CN201910865721A CN110541365A CN 110541365 A CN110541365 A CN 110541365A CN 201910865721 A CN201910865721 A CN 201910865721A CN 110541365 A CN110541365 A CN 110541365A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D6/00—Truss-type bridges
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- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention discloses a construction method of a multi-layer steel truss building, which comprises the following steps: arranging a plurality of reinforced concrete pedestals on the ground in the area corresponding to the steel truss to be arranged; arranging a support frame for bearing the load of the steel truss on the reinforced concrete base, wherein the support frame extends upwards to the bottom of the bottom steel truss; the steel trusses from the bottom layer to the top layer are sequentially arranged on the support frame from bottom to top, the steel trusses are integrally connected with the main body frames on the two sides of the steel trusses, and the main body frames on the two sides of the steel trusses are constructed from bottom to top before or while the steel trusses are arranged; through setting up the support frame in steel truss below, the support frame can provide the support for the steel truss of treating the construction for the installation of steel truss can go on in step with the construction of both sides main body frame in the middle of the building, consequently accelerated the construction progress, shortened construction cycle, guaranteed the smooth delivery of building.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a construction method of a multi-layer steel truss building.
background
during construction operation of a building with a multi-layer large-span steel truss, the traditional steel truss construction methods include an overhead bulk method, a sliding method and an integral hoisting method, but the construction methods are carried out on the premise that structures on two sides of the truss form an integral frame so as to meet the requirement of the stressed load of the truss, and the problems of long construction period, large required field, uneven stress and poor stability of the steel truss, difficulty in butt joint of the steel truss and main bodies on two sides and the like exist.
In an actual project, the steel structure of a target building is ten layers, a landscape river transversely penetrates through the middle of the steel structure, and a suspended steel truss which is 45m wide and has 7 layers in total is arranged in the middle of the steel structure; the existing design scheme adopts a sliding method to carry out installation work of the steel truss, namely, main structures on two sides are preferentially constructed, after the main structures reach the design strength, installation work of the middle river-crossing truss is carried out, the scheme cannot carry out procedure alternation, the construction period is long, the construction period is limited by external factors, the river-crossing truss must be constructed and completed before the flood season comes, and the existing scheme cannot complete the expected target.
therefore, how to solve the problems of long construction period and the like of the multi-layer steel truss building is a technical problem to be solved by technical personnel in the field at present.
Disclosure of Invention
The invention aims to provide a construction method of a multi-layer steel truss building, which enables a middle steel truss of the building to be constructed synchronously with main frames on two sides by arranging a support frame, and greatly shortens the construction period.
In order to solve the technical problem, the invention provides a construction method of a multi-layer steel truss building, which comprises the following steps:
Arranging a plurality of reinforced concrete pedestals on the ground in the area corresponding to the steel truss to be arranged;
Arranging a support frame for bearing the load of the steel truss on the reinforced concrete base, wherein the support frame extends upwards to the bottom of the bottom steel truss;
the steel truss from the bottom to the top layer is sequentially installed on the support frame from bottom to top, the steel truss is connected with the main body frames on two sides of the steel truss into a whole, and the two sides of the steel truss are conducted from bottom to top before or while the steel truss is installed.
preferably, the bottom of each support frame is embedded in the reinforced concrete abutment.
Preferably, a plurality of the supporting frames are evenly distributed at equal intervals in a matrix manner.
preferably, the support frame is lattice formula support frame, including upper mounting plate, lower platform, connect the upper mounting plate with the mobile jib of lower platform and establish the web member between the mobile jib.
Preferably, the bottom steel bar of the reinforced concrete abutment is a single-layer bidirectional steel bar, and the specification is C12@ 180; the concrete strength grade of the reinforced concrete base is C30.
Preferably, the steel truss that installs bottom layer to top layer in proper order from bottom to top includes:
Sequentially mounting steel trusses from the bottom layer to the X layer from bottom to top;
arranging a temporary strut on the steel truss on the X layer;
and sequentially mounting steel trusses from the X +1 th layer to the top layer on the temporary support columns.
Preferably, after the steel truss of the top layer is installed, the method further comprises the following steps: and after the main body frames on the two sides of the steel truss reach the designed strength, the support frame and the temporary support columns are dismantled.
Preferably, the temporary support columns are provided at positions corresponding to the suspension post brackets of the X +1 th-layer steel truss.
the invention provides a construction method of a multi-layer steel truss building, which comprises the following steps: arranging a plurality of reinforced concrete pedestals on the ground in the area corresponding to the steel truss to be arranged; arranging a support frame for bearing the load of the steel truss on the reinforced concrete base, wherein the support frame extends upwards to the bottom of the bottom steel truss; the steel truss from the bottom layer to the top layer is sequentially installed on the support frame from bottom to top, the steel truss is connected with the main body frames on the two sides of the steel truss into a whole, and the construction of the main body frames on the two sides of the steel truss is carried out from bottom to top before or while the steel truss is installed.
according to the construction method of the multi-layer steel truss building, the support frame is arranged below the steel truss and can provide support for the steel truss to be constructed, so that the installation of the steel truss in the middle of the building and the construction of the main body frames on the two sides can be carried out synchronously, the construction progress is accelerated, the construction period is shortened, and the smooth delivery of the building is ensured. In addition, the support frame can also ensure that the stress is uniform when the steel truss is installed, and the installation stability of the steel truss is ensured.
drawings
FIG. 1 is a process flow diagram of one embodiment of a method for constructing a multi-story steel truss building according to the present invention;
Fig. 2 is a schematic distribution diagram of a reinforced concrete abutment according to the present invention;
FIG. 3 is a schematic structural view of the support frame provided in the present invention;
FIG. 4 is a schematic view of a construction state of the construction method of the multi-story steel truss building according to the present invention;
FIG. 5 is a process flow diagram of another embodiment of the construction method of the multi-story steel truss building according to the present invention;
FIG. 6 is a schematic view of the distribution of temporary struts provided by the present invention;
FIG. 7 is a schematic view illustrating another construction state of the construction method of the multi-story steel truss structure according to the present invention;
fig. 8 is a construction flow chart of a specific embodiment of the construction method of the multi-layer steel truss building provided by the invention.
The drawings are numbered as follows:
Main body frame 1, steel truss 2, reinforced concrete base 3, support frame 4, interim pillar 5.
Detailed Description
the core of the invention is to provide a construction method of a multi-layer steel truss building, and the middle steel truss of the building can be constructed with the main body frames at two sides synchronously by arranging the supporting frame, so that the construction period is greatly shortened.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 to 4, fig. 1 is a process flow diagram of an embodiment of a construction method of a multi-story steel truss building according to the present invention; fig. 2 is a schematic distribution diagram of a reinforced concrete abutment according to the present invention; FIG. 3 is a schematic structural view of the support frame provided in the present invention; fig. 4 is a schematic view of a construction state of the construction method of the multi-layer steel truss building provided by the invention.
The construction method of the multilayer steel truss building provided by the specific embodiment of the invention comprises the following steps:
S1: arranging a plurality of reinforced concrete pedestals 3 in the area corresponding to the steel truss 2 to be arranged on the ground;
S2: a support frame 4 for bearing the load of the steel truss 2 is arranged on the reinforced concrete base 3, and the support frame 4 extends upwards to the bottom of the bottom steel truss 2;
The support frame 4 is arranged below the area where the steel truss 2 is located, the support frame is used for supporting the steel truss 2 to be constructed, so that the steel truss 2 and the main body frames 1 on two sides can be constructed synchronously, and the reinforced concrete base 3 is used as a basic platform for arranging the support frame 4 and is used for fixing the support frame 4 and increasing the contact area of the support frame 4 and the ground.
wherein, the bottom of each support frame 4 can be pre-buried in corresponding reinforced concrete base station 3 to realize being connected of support frame 4 and reinforced concrete base station 3, simple and convenient, and can make 4 structures of support frame more stable.
specifically, the bottom reinforcing steel bar of the reinforced concrete base 3 can be in a single-layer bidirectional reinforcing steel bar form, namely, a layer of reinforcing mesh is arranged at the bottom of the reinforced concrete base 3, and the reinforcing steel bar is arranged along the longitudinal direction and the transverse direction.
The support frame 4 preferably adopts a lattice type support frame 4, and the lattice type support frame 4 is a rod system structure formed by connecting section steel, steel pipes and the like, and has light weight and large bearing capacity.
Specifically, the support frame 4 may include an upper platform, a lower platform, main bars connecting the upper platform and the lower platform, and web members provided between the main bars, and the upper platform and the lower platform may be welded by H-shaped steel.
furthermore, each support frame 4 is preferably uniformly arranged at equal intervals according to the area of the steel truss 2, so that the steel truss 2 is uniformly stressed during installation, and the load is unloaded at the same time, thereby ensuring the installation stability of the steel truss 2.
It should be noted that the size, the supporting size, the number of the sets, the arrangement of the reinforced concrete base 3, and the like may be determined according to the structure of the actual construction steel truss 2, and the present application does not specifically limit the same.
S3: the construction of the main body frames 1 on the two sides of the steel truss 2 is carried out from bottom to top, the steel truss 2 from the bottom to the top layer is sequentially installed on the support frame 4 from bottom to top, and the steel truss 2 and the main body frames 1 on the two sides are connected into a whole.
the steel truss 2 generally comprises a lower chord, a web member, an upper chord and a layer beam, and when each layer of steel truss 2 is installed, the lower chord, the web member, the upper chord and the layer beam can be specifically installed by adopting a crawler crane from bottom to top in sequence until the installation of the top layer steel truss 2 is completed.
In order to integrate the steel truss 2 with the main frames 1 on both sides after installation, the main frames 1 need to be constructed before or at the same time as the installation of the steel truss 2.
Because the construction of the main body frame 1 and the installation of the steel truss 2 are both processes, a certain time is needed, preferably, the construction of the main body frame 1 and the installation of the steel truss 2 are carried out synchronously, after the bottom layer steel truss 2 is supported, the installation work of each layer of the steel truss 2 in the middle is carried out synchronously along with the construction progress of the main body frames 1 at two sides, namely, the whole multi-layer steel truss building is constructed in a whole sequential assembling mode, and the construction period can be shortened to the maximum.
It can be understood that, during the construction of the multi-story steel truss building, the portion of the main body frame 1 below the steel truss 2 is preferably constructed simultaneously with the reinforced concrete foundation 3 and the support frame 4, so that the construction time can be maximally saved.
Of course, when the construction period is allowed, the main body frame 1 may be constructed before the steel truss 2 is installed, specifically, the construction of the main body frame 1 may be inserted before and after the reinforced concrete base or the support frame is installed, or the construction of the main body frame 1 may be performed simultaneously when the reinforced concrete base or the support frame is installed, and it is within the protection scope of the present invention as long as the construction progress of the main body frame 1 is not later than the installation progress of the steel truss 2.
According to the construction method of the multi-layer steel truss building, the support frame 4 is arranged below the steel truss 2, and the support frame 4 can provide support for the steel truss 2 to be constructed, so that the installation of the steel truss 2 in the middle of the building can be performed synchronously with the construction of the main body frames 1 on the two sides, the problem that the steel truss 2 cannot be installed before the main body frames 1 are finished is solved, the construction progress is accelerated, the construction period is shortened, and the smooth delivery of the building is ensured. In addition, the supporting frame 4 can also ensure that the steel truss 2 is stressed uniformly during installation, and the installation stability of the steel truss 2 is ensured.
Referring to fig. 5 to 7, fig. 5 is a process flow diagram of another embodiment of the construction method of a multi-story steel truss building according to the present invention; FIG. 6 is a schematic view of the distribution of temporary struts provided by the present invention; fig. 7 is a schematic view of another construction state of the construction method of the multi-story steel truss building according to the present invention.
on the basis of the above specific embodiments, in the existing multi-layer steel truss building, the bottom layer of the middle steel truss 2 part is usually in a vestibule structure, a certain layer in the middle has no suspension posts, so that the steel trusses 2 on the upper layer are all supported by the main body frames 1 on both sides, and the rest steel trusses 2 are usually connected by the suspension posts, so as to realize support and load transfer; under this condition, for guaranteeing the normal installation of steel truss 2, when installing bottom to the steel truss 2 of top layer in proper order from supreme down, specifically can carry out according to following step:
s31: sequentially installing steel trusses 2 from the bottom layer to the X layer from bottom to top;
In the construction method of the multi-story steel truss building provided in the embodiment of the present invention, assuming that the total number of layers of the steel truss 2 is N, and there is no suspension post on the X-th story steel truss 2, then X is greater than or equal to 1 and is less than or equal to N-1, and X, N are all positive integers.
S32: arranging temporary struts 5 on the steel truss 2 on the X layer;
S33: and sequentially installing the steel trusses 2 from the X +1 th layer to the top layer on the temporary support columns 5.
Through setting up temporary support 5 for the installation construction load of the X +1 st floor to top layer steel truss 2 can be through temporary support 5 downward transmission, and not born by truss self, satisfies the structural stress requirement.
In the multi-story steel truss building, if no suspension posts are provided between the multi-story steel trusses 2, the multi-story temporary support 5 needs to be provided during construction.
In addition, the bottom layer steel truss 2 and the upper layer steel truss 2 can be connected through the inclined strut, and the two layers of steel trusses 2 are connected through the inclined strut to form a corridor structure. When the corridor structure is not arranged, the two layers of steel trusses 2 are connected through the hanging posts.
Specifically, a steel pipe may be selected as the temporary support column 5, and the temporary support column 5 may be specifically provided at a position corresponding to the suspension post bracket on the X +1 th steel truss 2, so as to be able to better transmit load and support the upper steel truss 2.
further, the construction method of the multi-layer steel truss building provided by the invention further comprises the following steps after the steel truss 2 at the top layer is installed:
S4: and (3) after the main body frames 1 on the two sides of the steel truss 2 reach the designed strength, removing the support frame 4 and the temporary support 5.
When the main body frames 1 on the two sides of the steel truss 2 reach the design strength, the main body frames 1 can meet the stress load requirements of the steel truss 2 on each layer, and the support frame 4 and the temporary support 5 are removed at the moment to complete the building construction operation.
Referring to fig. 8, fig. 8 is a construction flow chart of an embodiment of a construction method of a multi-story steel truss building according to the present invention.
The invention provides a construction method of a multi-layer steel truss building, which takes a target building with a main steel structure of ten layers and a middle part of a river-crossing steel truss 2 with the width of 45m as an example, wherein the river-crossing steel truss 2 of the target building is in a three-layer to ten-layer structure, the bottom layer, namely the third-layer steel truss 2 is in a corridor structure, and the fourth-layer steel truss 2 is not provided with a suspension strut, so that during construction operation, a reinforced concrete base 3 and a support frame 4 can be arranged below the area of the steel truss 2 firstly, then the bottom-layer steel truss 2, namely the third-layer steel truss 2 is arranged, then the fourth-layer steel truss 2 is arranged, then a temporary strut 5 is arranged on the fourth-layer steel truss 2 at a position corresponding to a suspension strut bracket of the fifth-layer steel truss 2, and then the fifth-layer steel truss 2 to the top-layer steel truss 2 are;
Wherein, 8 reinforced concrete bases 3 can be arranged on the river-crossing steel truss 2, each reinforced concrete base 3 is uniformly arranged at equal intervals in a 2 x 4 matrix mode, and each reinforced concrete base 3 is provided with a support frame 4; the concrete size (length multiplied by width multiplied by height) of the reinforced concrete foundation 3 can be set to be 4m multiplied by 0.4m, the concrete strength grade is C30, the bottom steel bars are in a single-layer bidirectional steel bar form, the specification of the transverse and longitudinal steel bars is C12@180, namely the transverse and longitudinal steel bars are all steel bars with the diameter of 12mm, and the steel bar spacing is 180 mm; the supporting frame 4 can be a lattice type supporting frame 4, the cross section size of the supporting frame 4 is 1.5m multiplied by 1.5m, the upper platform and the lower platform of the supporting frame 4 are formed by welding H-shaped steel with the model number of 300 multiplied by 10 multiplied by 15, the main rod piece is a phi 180 multiplied by 8 steel pipe, the web members are phi 102 multiplied by 6 steel pipes, and the material is Q345; the temporary support 5 can be made of steel pipe with the diameter of 600 multiplied by 12. The units of the above-mentioned unidentified units are all mm in size.
In the description of the present application document, it should be noted that the embodiments in the description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and similar parts between the embodiments may be referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant part can be referred to the method part for description.
the construction method of the multi-layer steel truss building provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (8)
1. A construction method of a multi-layer steel truss building is characterized by comprising the following steps:
Arranging a plurality of reinforced concrete base stations (3) in the area corresponding to the steel truss (2) to be arranged on the ground;
A support frame (4) for bearing the load of the steel truss (2) is arranged on the reinforced concrete base (3), and the support frame (4) extends upwards to the bottom of the bottom steel truss (2);
the steel truss (2) of bottom to top layer is installed from supreme down in proper order on support frame (4) to make steel truss (2) link as whole rather than main body frame (1) of both sides, before installation steel truss (2) or when installing steel truss (2), from supreme steel truss (2) both sides of carrying on down the construction of main body frame (1).
2. The construction method of a multi-story steel truss building according to claim 1, wherein the bottom of each of the support frames (4) is embedded in the reinforced concrete abutment (3).
3. the construction method of a multi-story steel truss building according to claim 2, wherein a plurality of the support frames (4) are uniformly distributed at equal intervals in a matrix manner.
4. the construction method of a multi-story steel truss building according to claim 2, wherein the support frame (4) is a lattice-type support frame (4) including an upper deck, a lower deck, main masts connecting the upper deck and the lower deck, and web members provided between the masts.
5. The construction method of the multi-layer steel truss building according to claim 4, wherein the bottom steel bars of the reinforced concrete foundation (3) are single-layer bidirectional steel bars, and the specification is C12@ 180; the concrete strength grade of the reinforced concrete base (3) is C30.
6. The construction method of a multi-story steel truss building according to any one of claims 1 to 5, wherein the installing the bottom-to-top steel trusses (2) in sequence from bottom to top comprises:
sequentially mounting steel trusses (2) from the bottom layer to the X layer from bottom to top;
Arranging temporary struts (5) on the steel truss (2) on the X-th layer;
And sequentially installing the steel truss (2) from the X +1 th layer to the top layer on the temporary support column (5).
7. The construction method of a multi-story steel truss building according to claim 6, further comprising, after the top steel truss (2) is installed: and after the main body frames (1) on the two sides of the steel truss (2) reach the designed strength, the support frame (4) and the temporary support columns (5) are dismantled.
8. The multi-story steel truss building construction method according to claim 7, wherein the temporary support columns (5) are provided at positions corresponding to suspension post brackets of the X + 1-th story steel truss (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910865721.1A CN110541365A (en) | 2019-09-12 | 2019-09-12 | Construction method for multi-layer steel truss building |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910865721.1A CN110541365A (en) | 2019-09-12 | 2019-09-12 | Construction method for multi-layer steel truss building |
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