CN110080525B - Bidirectional synchronous construction method for high-rise building - Google Patents
Bidirectional synchronous construction method for high-rise building Download PDFInfo
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- CN110080525B CN110080525B CN201910323493.5A CN201910323493A CN110080525B CN 110080525 B CN110080525 B CN 110080525B CN 201910323493 A CN201910323493 A CN 201910323493A CN 110080525 B CN110080525 B CN 110080525B
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- E—FIXED CONSTRUCTIONS
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Abstract
The invention relates to a bidirectional synchronous construction method for a high-rise building, and belongs to the technical field of building construction. According to the method, the steel columns at the shear walls of the core cylinders are encrypted to form encrypted steel columns, the cast-in-place piles below the encrypted steel columns are also encrypted, and box body bearing structures comprising the steel columns, the horizontal structures of B0 layers, the horizontal structures of B1 layers and the core cylinders of B1 layers are formed. In addition, the construction of the encrypted steel column of the basement is firstly completed, and after the bottom plate of the basement is poured, the shear wall of the core barrel of the basement is constructed by adopting a sequential construction method, so that the problem that the shear wall cannot be reversely constructed is solved, and the conversion of the encrypted steel column and the shear wall of the core barrel is realized.
Description
Technical Field
The invention relates to a bidirectional synchronous construction method for a high-rise building, in particular to a bidirectional synchronous construction method for a basement and a overground core tube of the high-rise building, and belongs to the technical field of building construction.
Background
The reverse construction method can solve the problem of operation safety of the foundation pit in the dense area of the urban high-rise building, shorten the construction period, reduce the construction temporary support cost and maximize the economic benefit of unit land, and is more and more widely applied to building construction. The core idea of the reverse construction method is that the basements at all layers below the ground adopt a top-down construction sequence, and the horizontal rigidity formed by the floor structures of the basements and the vertical supporting structures has a supporting effect on the foundation pit, so that the safety of earth excavation of the foundation pit is ensured.
However, the basement of the high-rise and ultra-high-rise structure comprises a plurality of floors, the construction period of the underground structure is long, and if the basement is constructed and the structure above the ground is constructed, the construction period of the building is affected. In recent years, a bidirectional synchronous construction technology for high-rise buildings is proposed to synchronously construct an underground structure and an overground structure and accelerate the construction progress. At present, in the bidirectional synchronous construction technology of high-rise buildings, a core tube is of a reinforced concrete structure, and how to realize safe transmission of upper gravity in reverse construction of basements is a difficult problem to be solved urgently in construction.
It is noted that the information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information is known prior art to a person skilled in the art.
Disclosure of Invention
The invention provides a bidirectional synchronous construction method for a high-rise building, wherein steel columns below a core barrel are encrypted, a shear wall with a B1 layer is constructed, and a stable box type force transmission system is formed by horizontal steel beams, the shear wall and the steel columns, so that the transmission of the structural gravity on the ground is realized in bidirectional synchronous construction, and the construction safety and the construction speed are improved.
In order to solve the technical problems, the invention comprises the following technical scheme:
a bidirectional synchronous construction method for high-rise buildings comprises the following steps:
firstly, performing cast-in-place pile construction to form a foundation engineering pile, inserting a steel column of a building structure into a pile foundation, and encrypting the steel column at the shear wall of the core barrel and the cast-in-place pile below the steel column to form an effective vertical force transfer system;
secondly, excavating a B1 layer of soil body to reach the elevation of a B1 layer of floor slab, paying off and positioning a B1 layer of horizontal steel beam, hoisting a B1 layer of horizontal steel beam to realize rigid connection with the steel column, constructing a B1 layer of horizontal steel secondary beam, constructing a B1 layer of floor slab, and finishing the construction of a B1 layer of horizontal structure; paying off and positioning horizontal steel beams of the B0 layer, hoisting the horizontal steel beams of the B0 layer, enabling the horizontal steel beams of the B0 layer to be rigidly connected with the steel columns, constructing horizontal steel secondary beams of the B0 layer, performing floor plate construction of the B0 layer, and completing construction of a horizontal structure of the B0 layer; building a shear wall template to complete the construction of a B1-layer core tube shear wall, and forming a box body bearing structure comprising steel columns, a B0-layer horizontal structure, a B1-layer horizontal structure and a B1-layer core tube;
thirdly, constructing the rest layers of the basement in sequence by adopting a reverse construction method until the construction of the basement bottom plate is finished, and synchronously constructing the ground structure of the building;
and fourthly, completing the construction of the shear wall of the underground core barrel by adopting a sequential construction method, and synchronously constructing the overground main structure until the construction of the main structure is completed.
Further, the steel column is a section steel column, a steel pipe column or a steel pipe concrete column.
Furthermore, the floor plate adopts a profiled steel sheet composite floor or a steel truss composite floor.
Further, horizontal girder steel includes girder steel extension section and girder steel standard festival, horizontal girder steel specifically includes with steel column rigid connection:
welding a section of horizontally arranged short steel beam on the steel column; splicing the long steel beam section and the short steel beam through the connecting steel plate, and welding a splicing end; the steel beam standard knot and the steel beam extension section are spliced through the connecting steel plate, and the splicing end is welded.
Further, the length of the short steel beam is 1-2 m.
Furthermore, the steel columns are wrapped with concrete steel pipe columns.
Further, the floor plate at the joint of the floor plate and the outer concrete-coated steel pipe column adopts concrete which is made of the same material as the outer concrete-coated steel pipe column, and the construction method comprises the following steps:
welding temporary support steel beams on horizontal steel beams around the outer concrete-coated steel pipe column to serve as concrete pouring boundaries of the floor plates, and pouring concrete of the floor plates outside the temporary support steel beam areas; after the construction of the basement bottom plate is finished, the temporary support steel beam is cut, the profiled steel plates are laid, and when concrete of the outer-wrapped concrete steel pipe column is poured, concrete with the same material as the outer-wrapped concrete steel pipe column is adopted, and the floor plates around the outer-wrapped concrete steel pipe column are poured together.
Further, when the construction of the local upper core tube reaches m layers above the ground, if the construction of the basement bottom plate is not finished, the construction of the ground core tube is suspended, after the construction of the basement bottom plate is finished, the construction of the ground core tube is resumed, and the safety of the building in the bidirectional synchronous construction of the high-rise building is ensured, wherein m is determined according to the weight of the built structure and the bearing capacity of the cast-in-place pile.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages and positive effects: the steel columns at the shear walls of the core cylinders are encrypted to form encrypted steel columns, cast-in-place piles below the encrypted steel columns are also encrypted, construction of B1 layers of horizontal structures, construction of B0 layers of horizontal structures and construction of B1 layers of shear walls of the core cylinders are carried out, a box body bearing structure comprising the steel columns, the B0 layers of horizontal structures, the B1 layers of horizontal structures and the B1 layers of core cylinders is formed, the box body bearing structure has better integrity and higher rigidity, stress of the ground structure can be smoothly transmitted to the steel columns and the cast-in-place piles below the ground structure, the problem of uneven settlement caused by larger local pile foundation stress is solved, and the synchronous construction of the upper structure is realized in the process of basement construction. In addition, the construction of the encrypted steel column of the basement is firstly completed, and after the bottom plate of the basement is poured, the shear wall of the core barrel of the basement is constructed by adopting a sequential construction method, so that the problem that the shear wall cannot be reversely constructed is solved, and the conversion of the encrypted steel column and the shear wall of the core barrel is realized.
Drawings
Fig. 1 to 4 are schematic views illustrating a bidirectional synchronous construction method for a high-rise building according to an embodiment of the present invention;
FIG. 5 is a plan view of a connection node of a column and a horizontal steel beam;
FIG. 6 is an elevation view of a connection node of a column and a horizontal steel beam;
fig. 7 is a construction schematic diagram of a connection joint of an outer concrete-coated steel pipe column and a floor slab.
The numbers in the figures are as follows:
1-filling a pile; 2-steel column; 3, steel column encryption; 4-short steel beam; 5-steel beam extension section; 6-standard section of steel beam; 7-connecting steel plates;
10-B0 level horizontal structure; 11-B1 level horizontal structure; 110-B1 layer core barrel; 12-B2 level horizontal structure; 13-B3 level horizontal structure; 14-basement floor;
20-above ground structure; 21-above ground core barrel;
30-wrapping a concrete steel pipe column outside; 31-horizontal steel beams; 32-horizontal steel secondary beam; 33-temporary support steel beams; 34-floor plate.
Detailed Description
The present invention provides a method for bidirectional synchronous construction of high-rise buildings, which is further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent in conjunction with the following description. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
Example one
With reference to fig. 1 to 4, the bidirectional synchronous construction method for high-rise buildings provided by this embodiment includes the following steps:
firstly, construction of a cast-in-place pile 1 is carried out to form a foundation engineering pile, a steel column 2 of a building structure is inserted into a pile foundation, the steel column 2 at the position of a core tube shear wall and the cast-in-place pile 1 below the core tube shear wall are encrypted, and an effective vertical force transmission system is formed. Wherein, the steel column 2 can be selected from structural forms of section steel columns, steel pipe columns or steel pipe concrete columns. In the bidirectional synchronous construction of the high-rise building, the overground core tube is synchronously constructed in the basement construction, the core tube shear wall is not suitable for being synchronously constructed with the basement because the construction process adopts the construction from bottom to top, in order to effectively transfer the stress of the overground structure, the steel columns at the core tube shear wall are encrypted to form the encrypted steel columns 3, the pile foundation construction adopts the one-column-one-pile construction, and the cast-in-place piles 1 below the encrypted steel columns 3 are also encrypted.
Secondly, as shown in fig. 2, excavating a soil body of a B1 layer to reach the elevation of a floor slab of a B1 layer, paying off and positioning a horizontal steel beam of a B1 layer, hoisting a horizontal steel beam of a B1 layer to realize rigid connection with the steel column 2, constructing a horizontal steel secondary beam of a B1 layer, constructing a floor slab of a B1 layer, and completing construction of a horizontal structure 11 of a B1 layer; paying off and positioning horizontal steel beams of the B0 layer, hoisting the horizontal steel beams of the B0 layer, enabling the horizontal steel beams of the B0 layer to be rigidly connected with the steel column 2, constructing horizontal steel secondary beams of the B0 layer, performing floor plate construction of the B0 layer, and finishing the construction of the horizontal structure 10 of the B0 layer; and (3) erecting a shear wall template to complete the construction of the shear wall with the B1 layers of core cylinders 110, and forming a box body bearing structure comprising steel columns 2, the B0 layers of horizontal structures 10, the B1 layers of horizontal structures 11 and the B1 layers of core cylinders 110. This box load-carrying structure has better wholeness, great rigidity, can prevent the great inhomogeneous settlement's of producing of local pile foundation stress problem on smooth-going transmission to the steel column 2 and the bored concrete pile 1 of below of the stress of structure on the ground, guarantees at the in-process of basement construction, realizes superstructure's synchronous construction. In the invention, the construction of the underground B1 layer and the overground part is completed by a forward method. The horizontal steel secondary beam, namely the floor steel beam, can adopt H-shaped steel, I-shaped steel or box-shaped steel beam, and the floor slab adopts a profiled steel sheet composite floor slab or a steel truss composite floor slab, so that the construction efficiency is improved. The floor slab is preferably made of profiled steel sheet composite floor slabs or steel truss composite floor slabs, so that the construction efficiency is improved.
And thirdly, constructing the rest layers of the basement in sequence by adopting a reverse construction method until the construction of the basement bottom plate is finished, and synchronously constructing the ground structure 20 of the building. As shown in fig. 3, the basement in this embodiment has 4 floors, and after the second step of construction of the box body bearing structure, the horizontal structure 12 of the B2 floor, the horizontal structure 13 of the B3 floor, and the basement bottom plate 14 of the B4 floor are sequentially constructed by a reverse method. The horizontal structure 12 of the B2 layer, the horizontal structure 13 of the B3 layer and the horizontal structure 11 of the B1 layer are not described in detail.
And fourthly, completing the construction of the shear wall of the underground core barrel by adopting a sequential construction method, and synchronously constructing the overground main structure until the construction of the main structure is completed. The core tube shear wall is preferably constructed from bottom to top, and as shown in fig. 4, after the basement bottom plate 14 is poured, core tube shear walls of a layer B4, a layer B3 and a layer B2 are poured in sequence. Before the basement bottom plate 14 is poured, if the construction of the ground structure 20 is too fast to be beneficial to the overall stability of the building, the construction speed of the ground structure should be properly controlled, and a preferable construction method is that when the construction of the local upper core tube 21 to m floors on the ground is completed, if the construction of the basement bottom plate 14 is not completed, the construction of the ground core tube 21 is temporarily stopped, and after the construction of the basement bottom plate 14 is completed, the construction of the ground core tube is resumed, so as to ensure the safety of the building in the bidirectional synchronous construction of the high-rise building, wherein m is determined according to the weight of the built structure and the bearing capacity of the cast-in-place pile 1, and for example, m is 22.
According to the bidirectional synchronous construction method for the high-rise building, steel columns at the shear walls of the core barrels are encrypted to form encrypted steel columns 3, cast-in-place piles 1 below the encrypted steel columns 3 are also encrypted, and construction of horizontal structures 11 of B1 layers, horizontal structures 10 of B0 layers and shear walls of core barrels 110 of B1 layers is carried out, so that a box body bearing structure comprising steel columns 2, horizontal structures 10 of B0 layers, horizontal structures 11 of B1 layers and core barrels 110 of B1 layers is formed, the box body bearing structure has good integrity and high rigidity, stress of a ground structure can be smoothly transmitted to the steel columns 2 and the cast-in-place piles 1 below, the problem of uneven settlement caused by high local stress of pile foundations is solved, and synchronous construction of an upper structure is guaranteed in the process of basement construction. In addition, the construction of the encrypted steel column 3 of the basement is firstly completed, and after the bottom plate 14 of the basement is poured, the shear wall of the core barrel of the basement is constructed by adopting a forward construction method, so that the problem that the shear wall cannot be reversely constructed is solved, and the conversion of the encrypted steel column and the shear wall of the core barrel is realized.
In a preferred embodiment, as shown in fig. 5 and 6, the horizontal steel beam includes a steel beam extension section 5 and a steel beam standard knot 6, and the rigid connection between the horizontal steel beam and the steel column 2 specifically includes:
welding a section of short steel beam 4 horizontally arranged on the steel column 2; splicing the steel beam extension section 5 and the short steel beam 4 through the connecting steel plate 7, and welding a splicing end; the steel beam standard knot 6 and the steel beam extension section 5 are spliced through the connecting steel plate 7, and the splicing end is welded. Wherein, the length of the short steel beam 4 is 1 m-2 m. Wherein, adopt bolted connection between connection steel sheet and short steel roof beam 4, the girder steel extension section 5, adopt bolted connection between connection steel sheet and girder steel extension section 5, the girder steel standard festival 6, at the concatenation end of short steel roof beam 4, girder steel extension section 5 and the concatenation end welded fastening of girder steel extension section 5, girder steel standard festival 6.
In a preferred embodiment, as shown in fig. 7, the steel columns are concrete-encased steel columns 30. Further, the floor plate 34 at the joint with the outer concrete-coated steel pipe column 30 is made of concrete with the same material as the outer concrete-coated steel pipe column 30, and the construction method is as follows:
welding temporary support steel beams 33 on horizontal steel beams 31 or horizontal steel secondary beams 32 around the concrete-coated steel pipe column 30 to serve as concrete pouring boundaries of floor plates 34, and pouring concrete of the floor plates 34 outside the temporary support steel beams 33; after the basement bottom plate 14 is constructed, the temporary support steel beams 33 are cut, the profiled steel plates are laid, and when concrete of the outer-coated concrete steel pipe column 30 is poured, the concrete with the same material as the outer-coated concrete steel pipe column 30 is adopted to pour the floor plates around the outer-coated concrete steel pipe column 30.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (6)
1. A bidirectional synchronous construction method for high-rise buildings is characterized by comprising the following steps:
firstly, performing cast-in-place pile construction to form a foundation engineering pile, inserting a steel column of a building structure into a pile foundation, and encrypting the steel column at the shear wall of the core barrel and the cast-in-place pile below the steel column to form an effective vertical force transfer system;
secondly, excavating a B1 layer of soil body to reach the elevation of a B1 layer of floor slab, paying off and positioning a B1 layer of horizontal steel beam, hoisting a B1 layer of horizontal steel beam to realize rigid connection with the steel column, constructing a B1 layer of horizontal steel secondary beam, constructing a B1 layer of floor slab, and finishing the construction of a B1 layer of horizontal structure; paying off and positioning horizontal steel beams of the B0 layer, hoisting the horizontal steel beams of the B0 layer, enabling the horizontal steel beams of the B0 layer to be rigidly connected with the steel columns, constructing horizontal steel secondary beams of the B0 layer, performing floor plate construction of the B0 layer, and completing construction of a horizontal structure of the B0 layer; building a shear wall template to complete the construction of a B1-layer core tube shear wall, and forming a box body bearing structure comprising steel columns, a B0-layer horizontal structure, a B1-layer horizontal structure and a B1-layer core tube;
thirdly, constructing the rest layers of the basement in sequence by adopting a reverse construction method until the construction of the basement bottom plate is finished, and synchronously constructing the ground structure of the building;
fourthly, completing the construction of the shear wall of the underground core barrel by adopting a sequential construction method, and synchronously constructing the overground main structure until the construction of the main structure is completed;
wherein the steel columns are wrapped by concrete steel pipe columns; the floor plate at the joint of the outer concrete steel pipe column adopts concrete which is made of the same material as the outer concrete steel pipe column, and the construction method comprises the following steps: welding temporary support steel beams on horizontal steel beams around the outer concrete-coated steel pipe column to serve as concrete pouring boundaries of the floor plates, and pouring concrete of the floor plates outside the temporary support steel beam areas; after the construction of the basement bottom plate is finished, the temporary support steel beam is cut, the profiled steel plates are laid, and when concrete of the outer-wrapped concrete steel pipe column is poured, concrete with the same material as the outer-wrapped concrete steel pipe column is adopted, and the floor plates around the outer-wrapped concrete steel pipe column are poured together.
2. The bidirectional synchronous construction method of high-rise buildings according to claim 1, wherein the steel column is a section steel column or a steel pipe concrete column.
3. The bidirectional synchronous construction method of a high-rise building according to claim 1, wherein the floor slab is a profiled steel sheet composite floor slab or a steel truss composite floor slab.
4. The bidirectional synchronous construction method of the high-rise building according to claim 1, wherein the horizontal steel beam comprises a steel beam extension section and a steel beam standard knot, and the rigid connection of the horizontal steel beam and the steel column specifically comprises:
welding a section of horizontally arranged short steel beam on the steel column; splicing the long steel beam section and the short steel beam through the connecting steel plate, and welding a splicing end; the steel beam standard knot and the steel beam extension section are spliced through the connecting steel plate, and the splicing end is welded.
5. The bidirectional synchronous construction method of a high-rise building according to claim 4, wherein the length of the short steel beam is 1m to 2 m.
6. The bidirectional synchronous construction method of high-rise building as claimed in claim 1, wherein when the construction of the local upper core tube is completed to m floors above the ground, if the construction of the basement floor is not completed, the construction of the ground upper core tube is suspended, and after the construction of the basement floor is completed, the construction of the ground upper core tube is resumed, so as to ensure the safety of the building in the bidirectional synchronous construction of the high-rise building, wherein m is determined according to the weight of the built structure and the bearing capacity of the cast-in-place pile.
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| CN113529694B (en) * | 2021-06-29 | 2022-06-28 | 北京华城工程管理咨询有限公司 | Construction method for synchronously implementing underground reverse construction method and ground structure sequential construction |
| CN115324106B (en) * | 2022-08-19 | 2023-08-18 | 中建三局第三建设工程有限责任公司 | Construction method for optimizing intermittent stopping point of synchronous reverse construction technology |
| CN115559351B (en) * | 2022-10-24 | 2023-08-08 | 中建三局集团华南有限公司 | Reverse construction method for multi-layer basement of all-steel structure |
| CN116497946A (en) * | 2023-05-05 | 2023-07-28 | 中建三局集团(深圳)有限公司 | Tower separation type synchronous growth construction method |
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