CN109138267B - Fixing structure for end part of bearing girder of steel truss on top plate of squat silo and construction method - Google Patents
Fixing structure for end part of bearing girder of steel truss on top plate of squat silo and construction method Download PDFInfo
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- CN109138267B CN109138267B CN201811062045.6A CN201811062045A CN109138267B CN 109138267 B CN109138267 B CN 109138267B CN 201811062045 A CN201811062045 A CN 201811062045A CN 109138267 B CN109138267 B CN 109138267B
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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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Abstract
The invention provides a fixing structure for the end part of a steel truss bearing girder of a squat round silo roof and a construction method, wherein the fixing structure for the end part of the steel truss bearing girder of the squat round silo roof comprises the following steps: the bearing girder that the slope set up, its tip set up on slip form portal lower part annular channel-section steel and/or on the bin wall welding steel corbel, a U-shaped reinforcing bar, its two free ends bury underground in the storehouse top ring rail and/or in the bin wall, and its U-shaped kink pocket lives the tip of bearing girder. According to the fixing structure and the construction method for the end part of the bearing girder of the steel truss of the top plate of the squat silo, the fixing node of the end part of the bearing girder of the steel truss of the top plate is easy to construct, the safety defect caused by construction deviation is eliminated, the existing fixing mode for the end part of the bearing girder is not changed greatly, the safety guarantee is provided for the steel truss of the top plate to bear the construction load of the concrete of the top plate, and the safety performance of the existing fixing mode for the steel truss of the top plate is improved.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a fixing structure for an end part of a bearing girder of a steel truss on a top plate of a squat silo and a construction method.
Background
The shallow round bin top plate concrete formwork supporting system adopts a large number of large-diameter steel truss high-altitude integral formwork supporting systems at present except the traditional construction mode of erecting full-hall steel pipe frame supports, and steel trusses bear all loads of large-span top plate concrete construction.
The diameter of the steel truss is 21-30 m, the steel truss bears the top plate concrete at the upper part, and the construction load reaches 300-1000 t, so that the fixing mode of the steel truss girder and the top plate concrete of the cabin is particularly important, and the safety of the top plate construction is directly related; at present, two fixing modes of simply supporting a girder on an annular channel steel at the lower part of a slip form portal and simply supporting the girder on a cabin wall to weld a steel corbel are provided;
the steel sections of the slip form portal frame and the annular groove steel in the first mode are small in rigidity and large in deformation, and are difficult to bear the load of a top plate, the steel truss in the second mode is manufactured and installed in a deviation mode, and the problems that the length is insufficient, the center is deviated and the like often occur at the placement position of the end part of the girder and the steel corbel, so that the stress safety of the steel truss is influenced.
Disclosure of Invention
The invention aims to provide a fixing structure for the end part of a bearing girder of a steel truss on a top plate of a squat silo and a construction method, and improve the safety performance of the conventional steel truss fixing mode.
The invention provides a fixing structure for the end part of a bearing girder of a steel truss on a top plate of a squat silo, which comprises: the bearing girder that the slope set up, its tip set up on slip form portal lower part annular channel-section steel and/or on the bin wall welding steel corbel, a U-shaped reinforcing bar, its two free ends bury underground in the storehouse top ring rail and/or in the bin wall, and its U-shaped kink pocket lives the tip of bearing girder.
Further, a wedge-shaped block is fixedly connected to the lower portion of the load-bearing girder, the bottom surface of the wedge-shaped block is horizontal, and the bottom surface of the wedge-shaped block is erected on the upper surface of the annular groove steel.
Furthermore, two fixing blocks are further fixed on the side wall of the end part of the bearing beam, an installation space is formed between the two fixing blocks, and the U-shaped bending part is clamped in the installation space.
Furthermore, the two free ends are welded and fixed on a steel reinforcement framework in the ring beam at the top of the silo and/or a steel reinforcement framework on the wall of the silo.
Further, the diameter of the U-shaped steel bar is 15-25 mm.
Further, the diameter of the U-shaped reinforcing steel bar is 20 mm.
The invention also provides a construction method of the fixing structure for the end part of the bearing girder of the steel truss on the top plate of the squat silo, which comprises the following steps:
a: embedding the U-shaped steel bars in the ring beam at the top of the silo and/or the wall of the silo;
b: installing a top plate steel truss, enabling the bearing girder to be obliquely arranged, enabling the end part of the bearing girder to be erected on the annular channel steel at the lower part of the slip form portal and/or the bin wall welding steel corbel, and enabling the U-shaped bent part to pocket the end part of the bearing girder;
c: and pouring the top plate concrete when the concrete strength of the U-shaped steel bar embedding position reaches more than 70% of the preset strength.
According to the fixing structure and the construction method for the end part of the bearing girder of the steel truss of the top plate of the squat silo, the fixing node of the end part of the bearing girder of the steel truss of the top plate is easy to construct, the safety defect caused by construction deviation is eliminated, the existing fixing mode for the end part of the bearing girder is not changed greatly, the safety guarantee is provided for the steel truss of the top plate to bear the construction load of the concrete of the top plate, and the safety performance of the existing fixing mode for the steel truss of the top plate is improved.
Drawings
FIG. 1 is a schematic structural diagram of a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a second embodiment of the present invention.
In the figure, 1, a slip form portal, 101, an annular channel steel, 2, a load-bearing girder, 201, a wedge block, 3, U-shaped reinforcing steel bars, 4, a bin wall, 5, a bin top ring beam and 6, a bin wall welding steel bracket.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
The first embodiment is as follows:
as shown in fig. 1, a squat silo roof steel truss load-bearing girder end fixing structure includes: the bearing girder 2 that the slope set up, its tip set up in slip form portal 1 lower part annular channel-section steel 101 on, a U-shaped reinforcing bar 3, its two free ends are buried underground in bulkhead 4, and its U-shaped kink pocket is lived the tip of bearing girder 2.
The steel truss is integrally dragged to the top of the bin by the slip form, and the annular channel steel 101 is small in size, so that the strength and the rigidity cannot meet the requirement of huge construction load of the top plate, and after the U-shaped steel bar 3 is added, the safety of the steel truss is greatly improved.
In an optional implementation manner of this embodiment, in order to ensure that the load-bearing girder 2 is stably erected on the annular channel 101, a wedge block 201 is fixedly connected below the load-bearing girder 2, a bottom surface of the wedge block 201 is horizontal, and a bottom surface of the wedge block is erected on an upper surface of the annular channel 101. In addition, because the wedge-shaped block 201 is protruded at the end part of the load-bearing girder 2, the U-shaped steel bar 3 can be effectively prevented from falling off.
In an optional implementation manner of this embodiment, in order to further limit the position of the U-shaped reinforcing steel bar 3, two fixing blocks (not shown) are further fixed on the side wall of the end portion of the load-bearing girder 2, an installation space is formed between the two fixing blocks, and the U-shaped bending portion is clamped in the installation space.
In an optional implementation manner of this embodiment, in order to fix the U-shaped steel bar 3 firmly, two free ends of the U-shaped steel bar 3 are welded and fixed on the steel reinforcement framework of the bin wall 4.
In an optional implementation manner of this embodiment, the diameter of the U-shaped steel bar 3 is 15 to 25mm, and preferably, the diameter of the U-shaped steel bar 3 is 20 mm.
The invention also provides a construction method of the fixing structure for the end part of the bearing girder of the steel truss on the top plate of the squat silo, which comprises the following steps:
a: embedding the U-shaped steel bars 3 in the bin wall 4;
b: installing a top plate steel truss to enable the bearing girder 2 to be obliquely arranged, wherein the end part of the top plate steel truss is erected on the annular channel steel 101 at the lower part of the slip form portal 1, and the U-shaped bent part is enabled to be caught at the end part of the bearing girder 2;
c: and pouring the top plate concrete when the concrete strength of the embedded part of the U-shaped steel bar 3 reaches more than 70% of the preset strength.
Example two:
as shown in fig. 2, a squat silo roof steel truss load-bearing girder end fixing structure includes: the bearing girder 2 that the slope set up, its tip set up on bulkhead welding steel corbel 6, a U-shaped reinforcing bar 3, its both free ends are buried underground in storehouse top ring beam 5, and its U-shaped kink pocket is lived the tip of bearing girder 2.
Usually, the problems of large deviation of an installation center, insufficient shelving length and the like exist between the end part of the bearing girder 2 and the bin wall welding steel corbel 6, and the safety of the steel truss support is greatly improved by adopting a U-shaped steel bar 3 reinforcing method.
In an optional implementation manner of the embodiment, in order to ensure that the load-bearing girder 2 is smoothly erected on the cabin wall welding steel corbel 6, a wedge block 201 is fixedly connected below the load-bearing girder 2, the bottom surface of the wedge block 201 is horizontal, and the bottom surface of the wedge block is erected on the upper surface of the cabin wall welding steel corbel 6. In addition, because the wedge-shaped block 201 is protruded at the end part of the load-bearing girder 2, the U-shaped steel bar 3 can be effectively prevented from falling off.
In an optional implementation manner of this embodiment, in order to further limit the position of the U-shaped reinforcing steel bar 3, two fixing blocks (not shown) are further fixed on the side wall of the end portion of the load-bearing girder 2, an installation space is formed between the two fixing blocks, and the U-shaped bending portion is clamped in the installation space.
In an optional implementation manner of this embodiment, in order to fix the U-shaped reinforcement 3 firmly, two free ends of the U-shaped reinforcement 3 are welded and fixed to the steel reinforcement framework of the ring beam 5 on the top of the bin.
In an optional implementation manner of this embodiment, the diameter of the U-shaped steel bar 3 is 15 to 25mm, and preferably, the diameter of the U-shaped steel bar 3 is 20 mm.
The invention also provides a construction method of the fixing structure for the end part of the bearing girder of the steel truss on the top plate of the squat silo, which comprises the following steps:
a: embedding the U-shaped steel bar 3 in a ring beam 5 at the top of the bin;
b: installing a top plate steel truss to enable the bearing girder 2 to be obliquely arranged, wherein the end part of the bearing girder is erected on a bin wall welding steel corbel 6, and the U-shaped bent part is enabled to be tucked at the end part of the bearing girder 2;
c: and pouring the top plate concrete when the concrete strength of the embedded part of the U-shaped steel bar 3 reaches more than 70% of the preset strength.
Example three:
the present embodiment combines the first embodiment with the second embodiment.
A plurality of bearing girders 2 are distributed on the periphery of the squat silo, so that the fixing structures in the first embodiment and the second embodiment can be used on the same construction site, and specific implementation modes are selected according to the conditions of the construction site. That is, the end of the load-bearing girder 2 may be placed on the annular channel 101 or the bulkhead welded steel corbel 6, or a part of the end of the load-bearing girder 2 may be placed on the annular channel 101 or a part of the end of the load-bearing girder 2 may be placed on the bulkhead welded steel corbel 6; two free ends of the U-shaped steel bar 3 can be embedded in the bin top ring beam 5 or the bin wall 4, or two free ends of a part of the U-shaped steel bar 3 are embedded in the bin top ring beam 5, and two free ends of a part of the U-shaped steel bar 3 are embedded in the bin wall 4.
The scope of the invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (7)
1. The utility model provides a squat silo roof steel truss bearing girder tip fixed knot constructs which characterized in that includes: the bearing girder that the slope set up, its tip set up on the annular channel-section steel of the lower part of slip form portal and/or on the bin wall welding steel corbel, a U-shaped reinforcing bar, its two free ends bury underground in the storehouse top ring beam and/or in the bin wall, and its U-shaped kink pocket is lived the tip of bearing girder below fixedly connected with wedge, the wedge is protruding at the tip of bearing girder.
2. The squat silo roof steel truss load-bearing girder end securing structure of claim 1, wherein the wedge block is horizontal in bottom and its bottom surface is lapped on the annular groove steel upper surface.
3. The structure for fixing the end part of the bearing girder of the squat silo roof steel truss according to claim 1, wherein two fixing blocks are further fixed on the side wall of the end part of the bearing girder, an installation space is formed between the two fixing blocks, and the U-shaped bent part is clamped in the installation space.
4. The squat silo roof steel truss load-bearing girder end fixing structure of claim 1, wherein the two free ends are welded and fixed on the steel reinforcement framework in the silo roof ring beam and/or the steel reinforcement framework on the silo wall.
5. The squat silo roof steel truss load-bearing girder end fixing structure of claim 1, wherein the diameter of the U-shaped steel bar is 15-25 mm.
6. The squat silo roof steel truss load-bearing girder end securing structure of claim 5, wherein the U-shaped reinforcing steel bars have a diameter of 20 mm.
7. The construction method of the end fixing structure of the bearing girder of the squat silo roof steel truss as claimed in any one of claims 1 to 6, characterized by comprising the following steps:
a: embedding the U-shaped steel bars in the ring beam at the top of the silo and/or the wall of the silo;
b: installing a top plate steel truss, fixedly connecting a wedge block below the bearing girder, wherein the wedge block is protruded at the end part of the bearing girder so that the bearing girder is obliquely arranged, the end part of the bearing girder is erected on the annular channel steel at the lower part of the slip form portal and/or the bin wall welding steel corbel, and the U-shaped bent part is enabled to pocket the end part of the bearing girder;
c: and pouring the top plate concrete when the concrete strength of the U-shaped steel bar embedding position reaches more than 70% of the preset strength.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811062045.6A CN109138267B (en) | 2018-09-12 | 2018-09-12 | Fixing structure for end part of bearing girder of steel truss on top plate of squat silo and construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811062045.6A CN109138267B (en) | 2018-09-12 | 2018-09-12 | Fixing structure for end part of bearing girder of steel truss on top plate of squat silo and construction method |
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| CN109138267A CN109138267A (en) | 2019-01-04 |
| CN109138267B true CN109138267B (en) | 2020-12-08 |
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| CN111456422A (en) * | 2020-04-24 | 2020-07-28 | 五冶集团上海有限公司 | Belt supporting device and method for conical steel truss on top of sliding-form silo of squat silo wall |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103114754A (en) * | 2013-02-04 | 2013-05-22 | 陕西煤业化工建设（集团）有限公司 | Alternative hoisting method for conjoined coal bunker top truss girder pre-placing |
| CN104100122A (en) * | 2014-08-01 | 2014-10-15 | 中国化学工程第三建设有限公司 | Construction method of cone-shaped top structure of large silo |
| CN106337589A (en) * | 2016-10-31 | 2017-01-18 | 中国冶集团有限公司 | Adjustable lifting umbrella-shaped supporting steel structure for cone frustum hold ceiling and construction method thereof |
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2018
- 2018-09-12 CN CN201811062045.6A patent/CN109138267B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103114754A (en) * | 2013-02-04 | 2013-05-22 | 陕西煤业化工建设（集团）有限公司 | Alternative hoisting method for conjoined coal bunker top truss girder pre-placing |
| CN104100122A (en) * | 2014-08-01 | 2014-10-15 | 中国化学工程第三建设有限公司 | Construction method of cone-shaped top structure of large silo |
| CN106337589A (en) * | 2016-10-31 | 2017-01-18 | 中国冶集团有限公司 | Adjustable lifting umbrella-shaped supporting steel structure for cone frustum hold ceiling and construction method thereof |
Non-Patent Citations (2)
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| "大直径煤仓仓顶锥壳高支撑中心架技术及应用";朱义铁;《建井技术》;20170430;第38卷(第2期);第19-22页 * |
| "筒仓混凝土横向结构架设径向钢桁架支模施工";张丽萍;《山西建筑》;20101220;第36卷(第36期);第122页 * |
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