CN112095798B - Super high-rise double-layer super large cantilever steel structure - Google Patents

Super high-rise double-layer super large cantilever steel structure Download PDF

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Publication number
CN112095798B
CN112095798B CN202010892420.0A CN202010892420A CN112095798B CN 112095798 B CN112095798 B CN 112095798B CN 202010892420 A CN202010892420 A CN 202010892420A CN 112095798 B CN112095798 B CN 112095798B
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layer
fixed
cantilever
cantilever beam
double
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CN112095798A (en
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蒋志军
李超
张伟
汤景祥
陈建龙
唐福珍
常晨曦
孙道豫
夏天
李会
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China Construction Eighth Engineering Division Co Ltd
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/34Extraordinary structures, e.g. with suspended or cantilever parts supported by masts or tower-like structures enclosing elevators or stairs; Features relating to the elastic stability

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  • Architecture (AREA)
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  • Civil Engineering (AREA)
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  • Bridges Or Land Bridges (AREA)

Abstract

The invention discloses a super high-rise double-layer super large cantilever steel structure which comprises a first layer of cantilever beam (41) fixed on a first layer of fixed beam (103), a second layer of cantilever beam (42) fixed on a second layer of fixed beam (102), a double-layer inclined strut (1), a second layer of inclined strut (2) and a counter strut (3); the lower end of the double-layer inclined strut is fixed on an overhanging area beam (101) positioned below the first layer of fixed beam, the upper end of the double-layer inclined strut is fixed on the second layer of overhanging beam, and the middle part of the double-layer inclined strut is fixed on the first layer of overhanging beam; the opposite supports are vertically fixed between the first layer of cantilever beam and the second layer of cantilever beam; the lower end of the second-layer inclined support is fixed on the wall body (104), and the upper end of the second-layer inclined support is fixed on the second-layer cantilever beam. According to the invention, the stress form of the large cantilever steel structure is optimized by arranging the inclined struts and the counter struts, so that the problems of large steel consumption of the cantilever beam, overlarge self weight of a cantilever steel structure platform and insufficient cantilever length are effectively solved, the length of the cantilever main beam and the load of a wall beam are reduced, the integrity of the cantilever steel structure is improved, and the structure can be cantilevered for a larger span.

Description

Super high-rise double-layer super large cantilever steel structure
Technical Field
The invention relates to the technical field of civil engineering steel structures, in particular to a super high-rise double-layer super large cantilever steel structure.
Background
With the continuous development of building technology, the building adopting the overhanging modes of variable cross section, special-shaped curved surface and the like has beautiful design, and the overhanging structure is one of the conventional building structures. However, in actual construction, especially for a large cantilever steel structure platform, the cantilever beam on a common plate needs more steel consumption, the whole load of the cantilever steel structure is large, the shearing force of the wall, the beam and the plate is too large, so that the stability of the cantilever platform is reduced, in order to ensure the stability and the safety of a building structure, the erection length of the cantilever platform can only be shortened in some building projects, and the large-span construction requirement of the large cantilever steel structure platform cannot be met. Meanwhile, the cantilever beam is long in length, large in self weight and large in quantity, is greatly influenced by horizontal wind load in high altitude, and is large in welding and fixing construction difficulty in the specific construction process.
Disclosure of Invention
The invention aims to provide a super high-rise double-layer super large cantilever steel structure, which can effectively solve the problems of large steel consumption of a cantilever beam, overlarge self weight of a cantilever steel structure platform and insufficient cantilever length by arranging inclined struts and optimizing the stress form of a large cantilever steel structure by opposite struts, obviously reduce the length of a cantilever main beam and the load of a wall beam, improve the integrity of the cantilever steel structure and realize larger span of structure cantilever.
The invention is realized by the following steps:
a super high-rise double-layer super large cantilever steel structure comprises a first layer of cantilever beam fixed on a first layer of fixed beam, a second layer of cantilever beam fixed on a second layer of fixed beam, a double-layer inclined strut, a second layer of inclined strut and a counter strut; the lower end of the double-layer inclined strut is fixed on the cantilever area beam below the first layer of fixed beam, the upper end of the double-layer inclined strut is fixed on the second layer of cantilever beam, and the middle part of the double-layer inclined strut is fixed on the first layer of cantilever beam; the opposite supports are vertically fixed between the first layer of cantilever beam and the second layer of cantilever beam; the lower ends of the two layers of inclined struts are fixed on the wall between the first layer of fixed beam and the second layer of fixed beam, and the upper ends of the two layers of inclined struts are fixed on the second layer of cantilever beam.
A first embedded part is embedded in the first layer of fixed beam through an embedded rod, the surface of the first embedded part is flush with the surface of the first layer of fixed beam, and the first layer of cantilever beam is fixed on the first embedded part through a first connecting plate.
A second embedded part is embedded in the wall body through an embedded rod, the surface of the second embedded part is flush with the wall body, and the lower ends of the two layers of inclined struts are fixed on the second embedded part.
The cantilever beam structure is characterized in that a third embedded part is embedded in the two layers of fixed beams through embedded rods, the surface of the third embedded part is flush with the end faces of the two layers of fixed beams, one end of a first stiffening plate is fixedly connected with the end part of the two layers of cantilever beams, and the other end of the first stiffening plate is fixed on the third embedded part, so that the two layers of cantilever beams are suspended on the two layers of fixed beams.
The cross sections of the first layer of cantilever beam and the second layer of cantilever beam are made of I-shaped steel, second stiffening plates are arranged at the welding joints of the first layer of cantilever beam and the second layer of cantilever beam, and the second stiffening plates are located on webs of the I-shaped steel.
Two adjacent I-shaped cantilever beams are connected through a connecting piece, and two adjacent I-shaped cantilever beams are connected through a connecting piece; the connecting piece is I-shaped steel, and the wing plate of the connecting piece is connected with the wing plate of the cantilever beam.
The first layer of cantilever beam and the first layer of cantilever beam, the first layer of cantilever beam and the connecting piece, the second layer of cantilever beam and the second layer of cantilever beam, and the second layer of cantilever beam and the connecting piece can be connected through a third stiffening plate, and two ends of the third stiffening plate are respectively fixed on the web plate of the I-steel.
The first layer cantilever beam and the second layer cantilever beam are both provided with second connecting plates, and two ends of the opposite support are respectively fixed on the second connecting plates, so that the opposite support is vertically connected between the first layer cantilever beam and the second layer cantilever beam.
The steel plates are paved on the two layers of cantilever beams, a plurality of steel beam keels are arranged at the bottom of each steel plate at intervals, and each steel beam keel is located between every two adjacent layers of cantilever beams.
The setting interval of girder steel fossil fragments be 300 mm.
The stress form of the large cantilever steel structure is optimized by arranging the double-layer diagonal braces, the double-layer diagonal braces and the diagonal braces, the load of a wall beam is obviously reduced, the bearing capacity of the cantilever steel beam is improved, the reinforced connection of structures such as stiffening plates, connecting pieces and connecting plates is matched, meanwhile, the length of the cantilever beam is prolonged by lapping in a rigid connection mode, the problems of large steel consumption of the cantilever beam, overlarge self weight of a platform of the cantilever steel structure and insufficient cantilever length can be effectively solved, the integrity and the stability of the cantilever steel structure are improved, the steel consumption is reduced, the structural cantilever with larger span and a large construction space structure platform are realized, and the safety of construction operation such as subsequent scaffold erection and the like can also be ensured.
Drawings
FIG. 1 is a front view of a double-layer diagonal brace in the super high-rise double-layer super large cantilever steel structure;
FIG. 2 is a front view of a second-layer diagonal brace in the super high-rise double-layer super large cantilever steel structure of the invention;
FIG. 3 is a sectional view of the mounting of one cantilever beam in the super high-rise double-deck super large cantilever steel structure of the present invention;
FIG. 4 is a sectional view of the installation of two layers of diagonal braces in the super high-rise double-layer super large cantilever steel structure of the invention;
FIG. 5 is a sectional view of the installation of a two-layer cantilever beam in the super high-rise double-layer super large cantilever steel structure of the invention;
FIG. 6 is a schematic view of a connection node of a layer of cantilever beam in the super high-rise double-layer super large cantilever steel structure;
FIG. 7 is a schematic diagram of the overlapping of one cantilever beam in the super high-rise double-layer super large cantilever steel structure of the present invention;
FIG. 8 is a sectional view of the installation of the opposite brace in the super high-rise double-deck super large cantilever steel structure of the present invention;
FIG. 9 is a schematic diagram of the overlapping of steel plates in the super high-rise double-layer super large cantilever steel structure.
In the figure, 1 double-layer diagonal brace, 2 double-layer diagonal brace, 3 pairs of braces, 101 cantilever area beams, 102 double-layer fixed beams, 103 single-layer fixed beams, 104 wall bodies, 41 single-layer cantilever beams, 42 double-layer cantilever beams, 51 first embedded parts, 52 second embedded parts, 53 third embedded parts, 60 bolts, 61 first stiffening plates, 62 second stiffening plates, 63 third stiffening plates, 71 first connecting plates, 72 second connecting plates, 8 connecting pieces, 9 steel plates, 10 steel beam keels and 11 embedded rods.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
Referring to fig. 1 and 2, the super high-rise double-layer super large cantilever steel structure comprises a first layer of cantilever beam 41 fixed on a first layer of fixed beam 103, a second layer of cantilever beam 42 fixed on a second layer of fixed beam 102, a double-layer inclined strut 1, a second layer of inclined strut 2 and a counter strut 3; the lower end of the double-layer inclined strut 1 is fixed on an overhanging area beam 101 below the first-layer fixed beam 103, the upper end of the double-layer inclined strut 1 is fixed on the second-layer overhanging beam 42, and the middle part of the double-layer inclined strut 1 is fixed on the first-layer overhanging beam 41; the opposite support 3 is vertically fixed between the first layer of cantilever beam 41 and the second layer of cantilever beam 42; the lower end of the second-layer inclined strut 2 is fixed on a wall 104 between the first-layer fixed beam 103 and the second-layer fixed beam 102, and the upper end of the second-layer inclined strut 2 is fixed on the second-layer cantilever beam 42. The double-layer inclined strut 1, the double-layer inclined strut 2 and the counter strut 3 effectively disperse load and avoid over-concentration of stress, so that the cantilever span is increased, the steel consumption is reduced, and meanwhile, construction space is provided for operations such as erecting a steel pipe fastener scaffold on the upper part, pouring a large-span roof truss beam and the like.
Referring to fig. 3, a first embedded part 51 is embedded in the first layer of fixed beam 103 through an embedded rod 11, the surface of the first embedded part 51 is flush with the surface of the first layer of fixed beam 103, and the first layer of cantilever beam 41 is fixed to the first embedded part 51 through a first connecting plate 71 by welding, preferably, the first embedded part 51, the first connecting plate 71 and the first layer of cantilever beam 41 can be connected and fixed in a double-sided full-welding manner, so that the first layer of cantilever beam 41 is reliably fixed to the first layer of fixed beam 103. And pouring a layer of fixed beams 103, the embedded rods 11 and the first embedded parts 51 together.
Referring to fig. 4, a second embedded part 52 is embedded in the wall 104 through an embedded rod 11, the surface of the second embedded part 52 is flush with the wall 104, and the lower end of the two-layer inclined strut 2 is welded and fixed on the second embedded part 52, so that the stability of the lower end of the two-layer inclined strut 2 can be improved. The second embedment 52, the embedment rod 11 and the wall 104 are cast together.
Referring to fig. 5, a third embedded part 53 is embedded in the two-layer fixed beam 102 through an embedded rod 11, the surface of the third embedded part 53 is flush with the end surface of the two-layer fixed beam 102, one end of a first stiffening plate 61 is fixedly connected with the end of the two-layer cantilever beam 42 through a bolt 60, and the other end of the first stiffening plate 61 is fixedly welded on the third embedded part 53, so that the two-layer cantilever beam 42 is suspended on the two-layer fixed beam 102, and the stability of the two-layer cantilever beam 42 is improved.
Preferably, the bolts 60 may be 8M 24 high-strength bolts arranged in two rows, and the first stiffening plate 61 is provided with corresponding bolt holes to achieve the purpose of rigid connection. The third embedded parts 53, the embedded rods 11 and the second-layer fixed beam 102 are poured together.
Referring to fig. 1 and 6, the cross sections of the first layer of cantilever beam 41 and the second layer of cantilever beam 42 are i-shaped steel, and the second stiffening plate 62 is disposed at the welding joint of the first layer of cantilever beam 41 and the second layer of cantilever beam 42, and the second stiffening plate 62 is located on the web of the i-shaped steel, so that the adjacent first layer of cantilever beam 41 and the adjacent second layer of cantilever beam 42 can be reliably welded, and the double-layer inclined strut 1, the first layer of cantilever beam 41 and the second layer of cantilever beam 42 can be reliably welded, thereby preventing welding from damaging the connection joint parts on the double-layer inclined strut 1, the first layer of cantilever beam 41 and the second layer of cantilever beam 42, and further improving the rigidity of the cantilever beam.
Referring to fig. 1 and 7, two adjacent i-shaped cantilever beams 41 are connected by a connecting member 8, and two adjacent i-shaped cantilever beams 42 are connected by a connecting member 8; the connecting piece 8 is made of I-shaped steel, the wing plates of the connecting piece 8 are connected with the wing plates of the cantilever beams, and preferably, the wing plates of the connecting piece 8 and the wing plates of the first layer of cantilever beam 41 and the wing plates of the connecting piece 8 and the wing plates of the second layer of cantilever beam 42 can be connected and fixed in an up-and-down full welding mode.
The first layer of cantilever beam 41 and the first layer of cantilever beam 41, the first layer of cantilever beam 41 and the connecting piece 8, the second layer of cantilever beam 42 and the second layer of cantilever beam 42, and the second layer of cantilever beam 42 and the connecting piece 8 can be connected through a third stiffening plate 63, two ends of the third stiffening plate 63 are respectively fixed on a web plate of I-shaped steel through bolts 60, the connection reliability between adjacent beam bodies can be improved, and the length and the width of the cantilever beam can be prolonged through the connecting piece 8 and the third stiffening plate 63.
Preferably, the bolts 60 may be 8M 24 high-strength bolts arranged in two rows, and the third stiffener plate 63 is provided with corresponding bolt holes to achieve the purpose of rigid connection.
Referring to fig. 1 and 8, the first layer of cantilever beam 41 and the second layer of cantilever beam 42 are both provided with a second connecting plate 72 through bolts 60, and two ends of the counter stay 3 are respectively fixed on the second connecting plate 72, so that the counter stay 3 is vertically connected between the first layer of cantilever beam 41 and the second layer of cantilever beam 42.
Preferably, the bolts 60 may adopt 8M 24 high-strength bolts arranged in two rows, and corresponding bolt holes are formed in the second connecting plate 72, so as to achieve the purpose of rigid connection. The pair of supports 3 can be made of I-shaped steel.
Referring to fig. 9, a steel plate 9 is laid on the two-layer cantilever beam 42, a plurality of steel beam keels 10 are arranged at intervals at the bottom of the steel plate 9, and the steel beam keels 10 are located between two adjacent two-layer cantilever beams 42 and used for providing a large construction space above the cantilever structure.
Preferably, the steel sheet 9 can adopt the decorative pattern steel sheet, and the steel sheet 9 is connected fixedly through two side full weld's mode and two layers cantilever beam 42, and the girder steel fossil fragments 10 set up the interval and be 300mm for promote the bending strength of steel sheet 9, guarantee upper portion steel pipe scaffold's stability.
The present invention is not limited to the above embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (4)

1. The utility model provides a double-deck super large steel construction of encorbelmenting of superelevation layer, characterized by: the device comprises a first layer of cantilever beam (41) fixed on a first layer of fixed beam (103), a second layer of cantilever beam (42) fixed on a second layer of fixed beam (102), a double-layer inclined strut (1), a second layer of inclined strut (2) and a counter strut (3); the lower end of the double-layer inclined strut (1) is fixed on an overhanging area beam (101) below the first-layer fixed beam (103), the upper end of the double-layer inclined strut (1) is fixed on the second-layer overhanging beam (42), and the middle of the double-layer inclined strut (1) is fixed on the first-layer overhanging beam (41); the opposite supports (3) are vertically fixed between the first layer of cantilever beam (41) and the second layer of cantilever beam (42); the lower end of the second-layer inclined strut (2) is fixed on a wall body (104) between the first-layer fixed beam (103) and the second-layer fixed beam (102), and the upper end of the second-layer inclined strut (2) is fixed on the second-layer cantilever beam (42);
a first embedded part (51) is embedded in the first layer of fixed beam (103) through an embedded rod (11), the surface of the first embedded part (51) is flush with the surface of the first layer of fixed beam (103), and the first layer of cantilever beam (41) is fixed on the first embedded part (51) through a first connecting plate (71);
a second embedded part (52) is embedded in the wall body (104) through an embedded rod (11), the surface of the second embedded part (52) is flush with the wall body (104), and the lower end of the second-layer inclined strut (2) is fixed on the second embedded part (52);
a third embedded part (53) is embedded in the second-layer fixed beam (102) through an embedded rod (11), the surface of the third embedded part (53) is flush with the end face of the second-layer fixed beam (102), one end of a first stiffening plate (61) is fixedly connected with the end part of the second-layer cantilever beam (42), and the other end of the first stiffening plate (61) is fixed on the third embedded part (53), so that the second-layer cantilever beam (42) is suspended on the second-layer fixed beam (102);
the sections of the first layer of cantilever beam (41) and the second layer of cantilever beam (42) are made of I-shaped steel, second stiffening plates (62) are arranged at the welding joints of the first layer of cantilever beam (41) and the second layer of cantilever beam (42), and the second stiffening plates (62) are positioned on webs of the I-shaped steel;
two adjacent I-shaped cantilever beams (41) are connected through a connecting piece (8), and two adjacent I-shaped cantilever beams (42) are connected through a connecting piece (8); the connecting piece (8) is I-shaped steel, and a wing plate of the connecting piece (8) is connected with a wing plate of the cantilever beam;
the cantilever beam structure is characterized in that the space between the first layer of cantilever beam (41) and the first layer of cantilever beam (41), the space between the first layer of cantilever beam (41) and the connecting piece (8), the space between the second layer of cantilever beam (42) and the second layer of cantilever beam (42), and the space between the second layer of cantilever beam (42) and the connecting piece (8) are all connected through a third stiffening plate (63), and two ends of the third stiffening plate (63) are respectively fixed on webs of the I-shaped steel.
2. The super high-rise double-layer super large cantilever steel structure of claim 1, wherein: and second connecting plates (72) are respectively arranged on the first layer of cantilever beam (41) and the second layer of cantilever beam (42), and two ends of the counter support (3) are respectively fixed on the second connecting plates (72), so that the counter support (3) is vertically connected between the first layer of cantilever beam (41) and the second layer of cantilever beam (42).
3. The super high-rise double-deck super cantilever steel structure of claim 1 or 2, wherein: the steel plates (9) are paved on the two layers of cantilever beams (42), a plurality of steel beam keels (10) are arranged at the bottom of each steel plate (9) at intervals, and the steel beam keels (10) are located between two adjacent layers of cantilever beams (42).
4. The super high-rise double-layer super large cantilever steel structure of claim 3, wherein: the setting interval of girder steel fossil fragments (10) be 300 mm.
CN202010892420.0A 2020-08-31 2020-08-31 Super high-rise double-layer super large cantilever steel structure Active CN112095798B (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203531349U (en) * 2013-10-31 2014-04-09 江西建工第二建筑有限责任公司 Novel high-bearing easily-dismantled overhanging type scaffold
CN104453197A (en) * 2014-10-13 2015-03-25 上海中锦建设集团股份有限公司 High-altitude large-cantilever concrete structure structural steel supporting platform
CN205348725U (en) * 2015-12-22 2016-06-29 中建六局第三建筑工程有限公司 Large -span, bearing structure that encorbelments by a wide margin
CN107100364A (en) * 2017-04-27 2017-08-29 中国十七冶集团有限公司 A kind of Long-span Cantilever stay in place form support system and its construction method
CN209799126U (en) * 2018-12-18 2019-12-17 中建二局第三建筑工程有限公司 roof large-span supporting structure that encorbelments
CN111350338A (en) * 2020-04-14 2020-06-30 中国建筑第四工程局有限公司 Construction steel platform for super-long overhanging structure of high-rise building
CN211257760U (en) * 2019-12-03 2020-08-14 中建四局建设发展有限公司 Triangular supporting device for overhanging scaffold
CN112252698A (en) * 2020-10-14 2021-01-22 中国建筑第四工程局有限公司 Super high-rise large cantilever steel truss construction platform

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203531349U (en) * 2013-10-31 2014-04-09 江西建工第二建筑有限责任公司 Novel high-bearing easily-dismantled overhanging type scaffold
CN104453197A (en) * 2014-10-13 2015-03-25 上海中锦建设集团股份有限公司 High-altitude large-cantilever concrete structure structural steel supporting platform
CN205348725U (en) * 2015-12-22 2016-06-29 中建六局第三建筑工程有限公司 Large -span, bearing structure that encorbelments by a wide margin
CN107100364A (en) * 2017-04-27 2017-08-29 中国十七冶集团有限公司 A kind of Long-span Cantilever stay in place form support system and its construction method
CN209799126U (en) * 2018-12-18 2019-12-17 中建二局第三建筑工程有限公司 roof large-span supporting structure that encorbelments
CN211257760U (en) * 2019-12-03 2020-08-14 中建四局建设发展有限公司 Triangular supporting device for overhanging scaffold
CN111350338A (en) * 2020-04-14 2020-06-30 中国建筑第四工程局有限公司 Construction steel platform for super-long overhanging structure of high-rise building
CN112252698A (en) * 2020-10-14 2021-01-22 中国建筑第四工程局有限公司 Super high-rise large cantilever steel truss construction platform

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