CN112814027A - Efficient detachable combined floor system for reverse construction method and construction method - Google Patents
Efficient detachable combined floor system for reverse construction method and construction method Download PDFInfo
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- CN112814027A CN112814027A CN202011643587.XA CN202011643587A CN112814027A CN 112814027 A CN112814027 A CN 112814027A CN 202011643587 A CN202011643587 A CN 202011643587A CN 112814027 A CN112814027 A CN 112814027A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/04—Making large underground spaces, e.g. for underground plants, e.g. stations of underground railways; Construction or layout thereof
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
- E02D29/05—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them at least part of the cross-section being constructed in an open excavation or from the ground surface, e.g. assembled in a trench
- E02D29/055—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them at least part of the cross-section being constructed in an open excavation or from the ground surface, e.g. assembled in a trench further excavation of the cross-section proceeding underneath an already installed part of the structure, e.g. the roof of a tunnel
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Abstract
The invention relates to a high-efficiency detachable composite floor slab system for a reverse construction method and a construction method, belongs to the technical field of building construction, and is used for solving the problem that the bearing capacity of a floor slab cannot meet the construction requirement in the reverse construction method. The concrete floor slab comprises a concrete floor slab, a vertical structure and a reinforcing structure, wherein the concrete floor slab is arranged above the vertical structure, and the reinforcing structure is arranged on the lower surface of the concrete floor slab; the additional strengthening is the truss-like structure that bracing piece and cable formed, and the upper end of bracing piece is fixed in concrete floor's lower surface, the lower extreme of bracing piece and the lower extreme fixed connection of cable, the both ends of cable and the interior fixed connection of burying of vertical structure. The concrete floor slab structure does not need to additionally increase the thickness and the reinforcing bars of the floor slab, resists additional construction load by the advantages of a self system, and the system not only can provide better rigidity and bearing capacity for the concrete floor slab, but also reduces the difficulty of site construction and increases the construction operation space.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a high-efficiency detachable composite floor slab system for a reverse construction method and a construction method.
Background
The reverse construction method is characterized in that before foundation pit excavation, an underground continuous wall supporting structure is firstly constructed along the outer wall of a basement of a building, pile foundation construction, a reinforced concrete column pouring, steel columns in butt joint with the concrete column or the pile foundation are installed, then a first floor is constructed, the underground continuous wall, the pile foundation and the column are connected together through the first floor, and the underground continuous wall supporting structure is used as a supporting structure for bearing the self weight and the construction load of an upper structure during construction. The reverse construction method is one of the most advanced construction techniques of high-rise buildings at present.
In the construction process of the reverse construction method, the average construction load is about 20KN per square meter, the local area is even as high as 50KN per square meter, the upper floor slab usually needs larger rigidity to resist the construction load, while the floor slab in the conventional design bears the load of about 5KN per square meter, the floor slab can meet the requirements of the normal use state and the bearing capacity limit state, but cannot bear larger construction load and cannot meet the requirements of the construction state, so that the floor slab needs to be reinforced in the construction process, and the bearing capacity of the floor slab can meet the construction requirements. The conventional floor slab reinforcing method is to increase the slab thickness, and the method determines whether to reserve or chisel off at a later stage according to requirements, which undoubtedly influences the use space of the building and increases the construction period and the construction cost of the project.
Disclosure of Invention
The invention aims to provide a high-efficiency detachable combined floor system for a top-down construction method and a construction method, which are reasonable in stress, convenient and fast to install and easy to detach, and aims to solve the problem that the bearing capacity of a floor cannot meet construction requirements in top-down construction method construction.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a high-efficiency detachable combined floor system for a reverse construction method comprises a concrete floor, a vertical structure and a reinforcing structure, wherein the concrete floor is arranged above the vertical structure, and the reinforcing structure is arranged on the lower surface of the concrete floor; the reinforced structure is a truss structure formed by the support rods and the inhaul cables, the upper ends of the support rods are fixed on the lower surface of the concrete floor slab, the lower ends of the support rods are fixedly connected with the lower ends of the inhaul cables, and the two ends of the inhaul cables are fixedly connected with the embedded parts of the vertical structure.
Compared with the prior art, the invention has the beneficial technical effects that:
according to the efficient detachable combined floor system for the reverse construction method, the truss type reinforcing structure formed by the supporting rods and the inhaul cables is arranged on the lower surface of the concrete floor, the thickness and the reinforcing bars of the floor are not required to be additionally increased, extra construction load can be resisted by the advantages of the system, the system can provide good rigidity and bearing capacity for the concrete floor, and the system has great advantages in the aspects of reducing the difficulty of site construction, increasing the construction operation space, improving material recycling, improving green construction and the like. Meanwhile, the construction period is greatly shortened, and various construction costs are saved.
Furthermore, the support rods and the stay cables can be used for carrying out stress design on the rod pieces according to the construction load of the concrete floor surface and also can be used for adjusting the prestress of the stay cables according to the construction load of the floor; when the construction load is removed and converted into a normal use load, the truss type reinforcing structure formed by the supporting rod and the inhaul cable is dismantled.
Furthermore, the lower surface of the concrete floor is provided with a plurality of supporting points which are respectively used for fixedly connecting the supporting rod and the inhaul cable, and the supporting points are provided with hidden beams.
Furthermore, an embedded part is arranged at the hidden beam.
Further, the reinforcing structure is divided into a single-point type, a two-point type, a three-point type or a multi-point type structure according to stress requirements.
Further, the cable can be preloaded.
The invention also provides a construction method of the high-efficiency detachable combined floor system for the reverse construction method, which comprises the following steps:
step S1, providing the high-efficiency detachable combined floor system for the reverse construction method for standby;
step S2, pouring a concrete floor slab on the vertical structure, and arranging a hidden beam and an embedded part at the branch point of the concrete floor slab;
and step S3, after the concrete reaches the construction strength, mounting the support rod and the stay cable at a preset position, fixedly connecting the upper end of the support rod with the embedded part on the lower surface of the concrete floor, fixedly connecting the lower end of the support rod with the lower end of the stay cable, and fixedly connecting the two ends of the stay cable with the embedded part in the vertical structure.
Furthermore, the support rods and the stay cables can be used for carrying out stress design on the rod pieces according to the construction load of the concrete floor surface and also can be used for adjusting the prestress of the stay cables according to the construction load of the floor; when the construction load is removed and converted into a normal use load, the truss type reinforcing structure formed by the supporting rod and the inhaul cable is dismantled.
And further, the height of the supporting rod is adjusted according to the stress calculation to enable the supporting rod to reach corresponding required rigidity, and the stay rope is preloaded to enable the stay rope to reach a design tension value.
Drawings
FIG. 1 is a schematic view of a single point support system for a modular floor system for reverse construction according to an embodiment of the present invention;
FIG. 2 is a schematic view of a two-point support system for a high efficiency removable composite floor system for reverse construction according to one embodiment of the present invention;
FIG. 3 is a schematic view of a three-point support system for a high efficiency removable composite floor system for reverse construction according to one embodiment of the present invention;
FIG. 4 is a schematic view of a multi-point support system for a high efficiency removable composite floor system for reverse construction according to one embodiment of the present invention;
FIG. 5 is a schematic view of the floor loading in normal use;
FIG. 6 is a schematic view of floor loading in a conventional design state of increasing the thickness of the plate;
fig. 7 is a schematic view of the lower floor load of the high efficiency removable composite floor system for reverse construction according to an embodiment of the present invention.
In the figure:
1-concrete floor slab; 2-a vertical structure; 3-a guy cable; 4-support bar.
Detailed Description
The present invention provides a high-efficiency removable composite floor system and construction method thereof for reverse construction method, which is described in detail with reference to the accompanying drawings and embodiments. The advantages and features of the present invention will become more apparent from 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. For convenience of description, the directions of "up" and "down" described below are the same as the directions of "up" and "down" in the drawings, but this is not a limitation of the technical solution of the present invention.
The structural components of the high-efficiency removable composite floor system for reverse construction according to the present invention will be described in detail with reference to fig. 1 to 4.
Example one
As shown in fig. 1 to 4, the high-efficiency removable composite floor system for reverse construction method of the present invention includes a concrete floor 1, a vertical structure 2, and a reinforcing structure (not shown), wherein the concrete floor 1 is disposed above the vertical structure 2, and the reinforcing structure is disposed on a lower surface of the concrete floor 1; the additional strengthening includes the truss-like structure that cable 3 and bracing piece 4 formed, and the upper end of bracing piece 4 is fixed in concrete floor's lower surface, the lower extreme of bracing piece 4 and the lower extreme fixed connection of cable 3, the built-in fitting fixed connection in cable 3's both ends and the vertical structure 2. Typically the vertical structure 2 is a structural wall, a structural column.
In the present embodiment, it is more preferable that the support rods 4 are adjustable support rods for flexibly adjusting the rigidity of the floor. That is, the height of the support rod 4 can be adjusted. The support rod 4 and the inhaul cable 3 can be adjusted according to actual working conditions, so that the stress design of a rod piece can be carried out according to the construction load of a concrete floor surface, and the prestress of the inhaul cable can be adjusted according to the construction load of the floor; when the construction load is removed and converted into the normal use load, the truss type reinforcing structure formed by the support rod 4 and the inhaul cable 3 is dismantled.
In this embodiment, more preferably, the lower surface of the concrete floor 1 is provided with a plurality of fulcrums for fixedly connecting the guy cables 3 and the support rods 4, respectively, and the fulcrums are provided with hidden beams.
In this embodiment, it is more preferable that the hidden beam is provided with an embedded part. When the composite floor slab system is constructed, the embedded parts are placed at the supporting points of the lower surface of the concrete floor slab 1 before the concrete floor slab is poured, and the composite floor slab system is installed after the concrete reaches the construction strength.
In this embodiment, it is more preferable that the reinforcing structure is divided into a single-point, two-point, three-point or multi-point structure according to the force requirement.
In the present embodiment, it is more preferable that the cable 3 be able to be preloaded. By preloading the inhaul cable 3, the designed pulling force value is achieved.
In this embodiment, more preferably, a stress detection device is further disposed on the guy cable 3, and the rigidity of the concrete floor 1 is flexibly adjusted through the stress detection device, so that the net height of the concrete floor 1 is saved.
With continued reference to fig. 1 to 4, the present embodiment further provides a construction method of a high-efficiency removable composite floor system for reverse construction, the construction method includes the following steps:
step S1, providing the high-efficiency detachable combined floor system for the reverse construction method for standby;
step S2, pouring a concrete floor slab 1 on the structural column, and arranging a hidden beam and an embedded part at the pivot of the concrete floor slab 1;
step S3, after the concrete of the concrete floor slab 1 reaches the construction strength, installing the guy cable 3 and the support rod 4 at a preset position, fixedly connecting the upper end of the support rod 4 with the embedded part on the lower surface of the concrete floor slab 1, fixedly connecting the lower end of the support rod 4 with the lower end of the guy cable 3, and fixedly connecting the two ends of the guy cable 3 with the embedded part in the vertical structure 2 after the guy cable 3 is prestressed.
Of course, the following steps of checking, acceptance and removal are also included, which are as follows:
and step S4, after the truss type reinforcing structure is constructed, construction operation can be carried out on the floor surface after the truss type reinforcing structure is inspected and accepted.
And step S5, after the construction operation is completed, the reinforcing structures are dismantled in sequence.
Of course, in order to flexibly adjust the rigidity of the concrete floor 1, the support rods 4 are height-adjustable support rods. And the height of the supporting rod 4 is adjusted according to the stress calculation to achieve the corresponding required rigidity, and the stay rope 3 is preloaded to achieve the designed tension value.
Referring to fig. 5 to 7, assuming that the load borne by the floor slab during normal use is q and the construction load in the reverse construction method is Δ q, comparing fig. 5, 6 and 7, it can be known that, compared with the conventional design, the present invention does not increase the thickness of the concrete floor slab, and can flexibly adjust the rigidity of the concrete floor slab through the stress detection device according to the construction load of the reverse construction method, thereby saving the clear height; and moreover, the large bearing capacity can be provided for the floor slab, and the construction requirement is met. Compared with the construction process of the traditional reverse construction method, the support system is detachable and convenient to install; can realize green construction, and the cyclic utilization rate can almost reach 100 percent.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.
Claims (9)
1. The efficient detachable combined floor system for the reverse construction method is characterized by comprising a concrete floor, a vertical structure and a reinforcing structure, wherein the concrete floor is arranged above the vertical structure, and the reinforcing structure is arranged on the lower surface of the concrete floor; the reinforced structure is a truss structure formed by the support rods and the inhaul cables, the upper ends of the support rods are fixed on the lower surface of the concrete floor slab, the lower ends of the support rods are fixedly connected with the lower ends of the inhaul cables, and the two ends of the inhaul cables are fixedly connected with the embedded parts of the vertical structure.
2. The high-efficiency detachable composite floor system for reverse construction according to claim 1, wherein the support rods and the guy cables can be designed for the stress of the rods according to the construction load of the concrete floor surface, and the prestress of the guy cables can be adjusted according to the construction load of the floor; when the construction load is removed and converted into a normal use load, the truss type reinforcing structure formed by the supporting rod and the inhaul cable is dismantled.
3. The system as claimed in claim 1, wherein the concrete floor slab has a plurality of supporting points for fixing and connecting the supporting rods and the pulling cables, and the supporting points are provided with hidden beams.
4. The system as claimed in claim 3, wherein the hidden beams are embedded parts.
5. The system of claim 1, wherein the reinforcing structure is divided into a single-point, two-point, three-point or multi-point structure according to the stress requirement.
6. The high efficiency removable composite floor system for reverse construction according to claim 1, wherein the bracing wires are pre-loaded.
7. A construction method of a high-efficiency detachable combined floor slab system for a reverse construction method is characterized by comprising the following steps:
step S1, providing the high-efficiency detachable composite floor slab system for reverse construction method according to any one of claims 1 to 6 for standby;
step S2, pouring a concrete floor slab on the vertical structure, and arranging a hidden beam and an embedded part at the branch point of the concrete floor slab;
and step S3, after the concrete reaches the construction strength, mounting the support rod and the stay cable at a preset position, fixedly connecting the upper end of the support rod with the embedded part on the lower surface of the concrete floor, fixedly connecting the lower end of the support rod with the lower end of the stay cable, and fixedly connecting the two ends of the stay cable with the embedded part in the vertical structure.
8. The construction method according to claim 7, wherein the support rods and the stay cables can be subjected to stress design of the rods according to construction load of the concrete floor surface, and can also be subjected to adjustment of the prestress of the stay cables according to construction load of the floor; when the construction load is removed and converted into a normal use load, the truss type reinforcing structure formed by the supporting rod and the inhaul cable is dismantled.
9. The construction method according to claim 8, wherein the height of the support rod is adjusted according to the force calculation to achieve the corresponding required rigidity, and the stay cable is preloaded to achieve the designed tension value.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011643587.XA CN112814027A (en) | 2020-12-31 | 2020-12-31 | Efficient detachable combined floor system for reverse construction method and construction method |
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| CN202011643587.XA CN112814027A (en) | 2020-12-31 | 2020-12-31 | Efficient detachable combined floor system for reverse construction method and construction method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005171488A (en) * | 2003-12-08 | 2005-06-30 | Sumitomo Metal Ind Ltd | Connection structure between steel wall and reinforced concrete plate |
| CN101250945A (en) * | 2008-04-02 | 2008-08-27 | 四川省建科工程技术公司 | Method for reinforcing floor belt-loading, load-off reinforcing or loading test in building field |
| CN101353912A (en) * | 2008-08-28 | 2009-01-28 | 温州建设集团公司 | Construction method of structure conversion layer concrete girder steel bracket formwork support |
| CN111927509A (en) * | 2020-06-30 | 2020-11-13 | 上海市机械施工集团有限公司 | Underground temporary broken line steel frame supporting system and construction method |
-
2020
- 2020-12-31 CN CN202011643587.XA patent/CN112814027A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005171488A (en) * | 2003-12-08 | 2005-06-30 | Sumitomo Metal Ind Ltd | Connection structure between steel wall and reinforced concrete plate |
| CN101250945A (en) * | 2008-04-02 | 2008-08-27 | 四川省建科工程技术公司 | Method for reinforcing floor belt-loading, load-off reinforcing or loading test in building field |
| CN101353912A (en) * | 2008-08-28 | 2009-01-28 | 温州建设集团公司 | Construction method of structure conversion layer concrete girder steel bracket formwork support |
| CN111927509A (en) * | 2020-06-30 | 2020-11-13 | 上海市机械施工集团有限公司 | Underground temporary broken line steel frame supporting system and construction method |
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Application publication date: 20210518 |
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