CN213868296U - Ultra-large-diameter thin-shell dome structure constructed by air film method - Google Patents
Ultra-large-diameter thin-shell dome structure constructed by air film method Download PDFInfo
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- CN213868296U CN213868296U CN202022378060.0U CN202022378060U CN213868296U CN 213868296 U CN213868296 U CN 213868296U CN 202022378060 U CN202022378060 U CN 202022378060U CN 213868296 U CN213868296 U CN 213868296U
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Abstract
The utility model relates to the building field, aiming at solving the problem that the structure of the existing inflation membrane method is easy to have concrete collapse phenomenon when being used for the construction of an ultra-large diameter thin-shell dome structure, and providing the ultra-large diameter thin-shell dome structure constructed by the air membrane method, which comprises an air membrane layer, a polyurethane layer and a reinforced concrete layer; the reinforced concrete layer comprises a structural layer and a structural layer; positioning nails are distributed on the polyurethane layer; the structural layer comprises an outer layer bidirectional reinforcing mesh and a structural concrete body; the outer layer bidirectional reinforcing mesh is connected to the positioning nails, and a structural concrete body wraps the outer layer bidirectional reinforcing mesh and is covered and connected to the inner side of the polyurethane layer; the structural layer comprises an inner-layer bidirectional reinforcing mesh and a structural concrete body; the inner layer bidirectional reinforcing mesh is connected to the positioning nails; the structural concrete body wraps the inner layer bidirectional reinforcing mesh and is connected to the inner side of the structural concrete body in a covering mode. The beneficial effects of the utility model are that construction convenience, concrete are difficult for collapsing.
Description
Technical Field
The utility model relates to a building field particularly, relates to a film method is applied and is established super large diameter thin shell dome structure.
Background
The concrete thin-shell dome structure is a space structure with attractive appearance, high bearing capacity and high space utilization rate, has good waterproof performance, is low in maintenance cost in the using process, has good fireproof and anti-explosion capabilities, and is often applied to large-scale storage structures. In actual construction, the method has the problems of high construction difficulty, long construction period, much labor consumption and the like, and sometimes has various problems of reliability, safety and the like because the engineering precision cannot be achieved. At present, the film forming method of the reinforced concrete thin shell structure mainly comprises the following four methods, namely an earth model method, a formwork support cast-in-place method and a prefabrication and assembly method. When the existing inflation membrane method is used for construction of an oversized-diameter thin-shell dome structure, the structure is easy to collapse.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a thin shell dome structure of super large diameter that gas film method was applied for establishes to solve current aerify embrane method when being used for the construction of super large diameter thin shell dome structure, the problem of the concrete collapse phenomenon appears in its structure easily.
The embodiment of the utility model is realized like this:
an ultra-large diameter thin-shell dome structure constructed by an air film method sequentially comprises an air film layer, a polyurethane layer and a reinforced concrete layer from outside to inside; the reinforced concrete layer sequentially comprises a structural layer and a structural layer from outside to inside;
the inner surface of the air film layer is in a dome shape;
the polyurethane layer is of a dome-shaped structure formed by polyurethane materials which are sprayed and attached to the inner surface of the air film layer; positioning nails are distributed on the polyurethane layer, one ends of the positioning nails are embedded in the polyurethane layer, and the other ends of the positioning nails are exposed out of the inner side of the polyurethane layer;
the construction layer comprises an outer layer of bidirectional reinforcing mesh and a construction concrete body; the outer layer bidirectional reinforcing mesh is connected to the positioning nails, and the structural concrete body wraps the outer layer bidirectional reinforcing mesh and is covered and connected to the inner side of the polyurethane layer;
the structural layer comprises an inner-layer bidirectional reinforcing mesh and a structural concrete body; the inner-layer bidirectional reinforcing mesh is connected to the positioning nails, so that the inner-layer bidirectional reinforcing mesh, the outer-layer bidirectional reinforcing mesh and the positioning nails form a double-layer bidirectional reinforcing mesh which is connected together; the structural concrete body wraps the inner-layer bidirectional reinforcing mesh and is connected to the inner side of the structural concrete body in a covering mode.
When the ultra-large-diameter thin-shell dome structure constructed by the air film method is constructed, the lower end of an air film is fixed on a basic ring beam, and the air film is inflated into the basic ring beam through air inflation equipment such as an air blower and the like until the air film is supported to form a dome-shaped air film layer; then spraying polyurethane to the inner surface of the air film to form a polyurethane layer attached to the inner surface of the air film layer, and arranging a positioning nail in the polyurethane layer when spraying the polyurethane layer; and then binding the outer layer bidirectional reinforcing mesh on the positioning nails, spraying structural layer concrete to form structural concrete body, binding the inner layer bidirectional reinforcing mesh on the positioning nails, and spraying structural layer concrete to form structural concrete body.
In this scheme, through the location nail of one end setting in the polyurethane layer and outer two-way reinforcing bar net and the two-way reinforcing bar net of inlayer connect jointly and constitute integrative double-deck two-way reinforcing bar net as the supplementary attached structure of concrete to and the form of shaping structural layer after the tectonic layer of shaping earlier, greatly reduced the possibility that the concrete collapsed in the work progress.
Therefore, the embodiment of the utility model provides an in the air film method facility's super large diameter thin shell dome structure have construction convenience, and be difficult to appear the beneficial effect of concrete collapse phenomenon in the work progress.
In one embodiment:
the polyurethane layer is formed in a layered spraying mode, and the thickness of each layer is 2-3 cm. With this arrangement, after the first layer of polyurethane is sprayed, the positioning pin can be inserted therein, and then the subsequent polyurethane can be spray-molded.
In one embodiment:
the positioning nails are exposed out of the polyurethane layer by 3-5 cm. The exposed length can also be set according to the thickness requirement of the structural layer and the structural layer.
In one embodiment:
the positioning nails are respectively perpendicular to the tangent plane of the dome at the position of the dome.
In one embodiment:
the lower end of the air film is fixed on the foundation ring beam.
In one embodiment:
a horizontal bottom plate is padded on the top surface of the foundation ring beam and fixedly connected to a circle of embedded pieces embedded in the foundation ring beam; the air film layer is characterized in that a connecting ring plate is connected to the horizontal bottom plate in an inclined mode, a pressing plate is arranged outside the connecting ring plate, and the pressing plate is connected with the connecting ring plate through bolts and can clamp the lower end of the air film layer between the pressing plate and the connecting ring plate.
This setting has the convenient fixed beneficial effect of air film.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings referred to in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings may be obtained from these drawings without inventive effort.
Fig. 1 is a schematic structural diagram of an ultra-large diameter thin shell dome structure implemented by a gas film method in an embodiment of the present invention;
FIG. 2 is an enlarged view of FIG. 1 at A;
the gas film layer and the basic ring beam connecting structure is shown in fig. 3.
Icon: the large-diameter thin-shell dome structure is characterized by comprising an ultra-large-diameter thin-shell dome structure 10 constructed by a gas film method, a gas film layer 11, a polyurethane layer 12, a reinforced concrete layer 13, a structural layer 14, a structural layer 15, positioning nails 16, an inner-layer bidirectional reinforced mesh 17, a structural concrete body 18, an outer-layer bidirectional reinforced mesh 19, a structural concrete body 20, a double-layer bidirectional reinforced mesh 21, foundation ring beams 22, embedded pieces 23, a horizontal bottom plate 24, a connecting ring plate 25, a pressing plate 26 and bolts 27.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Examples
Referring to fig. 1, 2 and 3, the present embodiment provides an ultra-large diameter thin-shell dome structure 10 applied by a gas film method, which comprises a gas film layer 11, a polyurethane layer 12 and a reinforced concrete layer 13 from outside to inside; wherein the reinforced concrete layer 13 comprises a structural layer 14 and a structural layer 15 in sequence from outside to inside.
Wherein the inner surface of the air film layer 11 is dome-shaped.
The polyurethane layer 12 is a dome-shaped structure formed by spraying polyurethane material attached to the inner surface of the air film layer 11; the polyurethane layer 12 is distributed with positioning nails 16, one end of each positioning nail 16 is embedded in the polyurethane layer 12, and the other end of each positioning nail 16 is exposed out of the inner side of the polyurethane layer.
The construction layer 14 comprises an outer bidirectional reinforcing mesh 19 and a construction concrete body 18; an outer two-way reinforcing mesh 19 is attached to the locating nails 16 and a structural concrete body 18 is wrapped around the outer two-way reinforcing mesh 19 and attached to the inside of the polyurethane layer.
The structural layer 15 comprises an inner layer bidirectional reinforcing mesh 17 and a structural concrete body 20; the inner layer bidirectional reinforcing mesh 17 is connected to the positioning nails 16, so that the inner layer bidirectional reinforcing mesh 17, the outer layer bidirectional reinforcing mesh 19 and the positioning nails 16 together form a connected double-layer bidirectional reinforcing mesh 21; a structural concrete body 20 wraps the inner two-way rebar grid 17 and is attached to the inside of the structural concrete body 18.
When the ultra-large-diameter thin-shell dome structure 10 constructed by the air film method in the scheme is constructed, the lower end of an air film is fixed on a basic ring beam 22, and the air film is inflated into the basic ring beam through air inflation equipment such as an air blower and the like until the air film is supported to form a dome-shaped air film layer 11; wherein, for the gas film with the super-large diameter, how to hoist and evenly spread the gas film must be carefully considered. The common schemes are as follows: the air film is transported to the middle position by an automobile, then is tiled, and is uniformly divided into n positions by a traction device and pulled to the ring beam. Scheme II: a hoisting scheme that a large crawler crane is matched with peripheral traction at the same time is adopted. The sugar refinery project is selected as a scheme II, and the scheme adopted is determined according to the actual situation of the site. The air film adopts the symmetry of two inlet channels to inflate simultaneously, and the in-process supervisory equipment of blowing detects the intramembranous air pressure constantly, detects whether the gas tightness of membrane is good. After the inflation is finished, the shape of the membrane needs to be detected, and the deviation value is ensured to be within an allowable range. After the air film is inflated, the position of the hole opening is calibrated on the air film, and preparation is made for opening the hole on the air film. And meanwhile, an air lock is arranged at the position of the hole, and the air lock is an access passage consisting of a plurality of airtight doors. After the air lock is installed, air film opening can be performed inside the air lock. Micro-positive pressure in the air film continuously feeds air, and the internal pressure is well controlled.
After the air film is arranged, spraying polyurethane to the inner surface of the air film to form a polyurethane layer attached to the inner surface of the air film layer 11, and arranging a positioning nail 16 in the polyurethane layer when the polyurethane layer is sprayed; the outer layer of bidirectional reinforcing mesh 19 is then tied to the locating studs 16, the structural layer 14 concrete is sprayed to form the structural concrete body 18, the inner layer of bidirectional reinforcing mesh 17 is tied to the locating studs 16, and the structural layer 15 concrete is sprayed to form the structural concrete body 20. Because the sprayed concrete has the characteristic of early strength, after the construction of the structural layer 14 is completed, the dome has higher rigidity and can bear the spraying impact force of the subsequent concrete; after the concrete of the structural layer 14 is hardened, the inner layer bidirectional reinforcing mesh 17 can be bound according to the positioning nails 16, and the concrete of the structural layer 15 is sprayed after the binding of the inner layer bidirectional reinforcing mesh 17 is finished. The reinforced concrete spraying principle is as follows: and (4) performing layered and sectional spraying from bottom to top to form stepped construction. At the same height, the spraying interval time of the structural layer 15 and the structural layer 14 is not less than 1 day.
In the scheme, the positioning nails 16 with one ends arranged in the polyurethane layer, the inner-layer bidirectional reinforcing mesh 17 and the outer-layer bidirectional reinforcing mesh 19 are connected together to form the integrated double-layer bidirectional reinforcing mesh 21 which is used as an auxiliary attachment structure of concrete, and the structural layer 14 is formed before the structural layer 15 is formed, so that the possibility of concrete collapse in the construction process is greatly reduced.
Therefore, the embodiment of the utility model provides an in the air film method facility's thin shell dome structure 10 of super large diameter has construction convenience, and is difficult to the beneficial effect that the phenomenon was collapsed to the concrete to appear in the work progress.
In this embodiment, the polyurethane layer is optionally formed in the form of a layered spray, each layer being 2-3cm thick. In this arrangement, after the first layer of polyurethane is injected, the positioning pins 16 are inserted therein, and then the subsequent polyurethane injection molding is performed. The positioning nail 16 is exposed out of the polyurethane layer by 3-5 cm. The exposed length may also be set according to the thickness requirements of the structural layer 15 and the structural layer 14. Alternatively, each locating peg 16 is perpendicular to the tangent plane of the dome at its location.
In this embodiment, the lower end of the gas film is fixed to the foundation ring beam 22. Optionally, as shown in fig. 3, a horizontal bottom plate 24 is padded on the top surface of the foundation ring beam 22, and the horizontal bottom plate is fixedly connected to a ring of embedded pieces 23 pre-embedded in the foundation ring beam 22; the horizontal bottom plate is connected with a connecting ring plate 25 in an inclined mode, a pressing plate 26 is arranged outside the connecting ring plate, and the pressing plate and the connecting ring plate are connected through a bolt 27 and can clamp the lower end of the air film layer 11 between the pressing plate and the connecting ring plate.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a thin shell dome structure of super large diameter that gas film method was established which characterized in that:
the air film layer, the polyurethane layer and the reinforced concrete layer are sequentially arranged from outside to inside; the reinforced concrete layer sequentially comprises a structural layer and a structural layer from outside to inside;
the inner surface of the air film layer is in a dome shape;
the polyurethane layer is of a dome-shaped structure formed by polyurethane materials which are sprayed and attached to the inner surface of the air film layer; positioning nails are distributed on the polyurethane layer, one ends of the positioning nails are embedded in the polyurethane layer, and the other ends of the positioning nails are exposed out of the inner side of the polyurethane layer;
the construction layer comprises an outer layer of bidirectional reinforcing mesh and a construction concrete body; the outer layer bidirectional reinforcing mesh is connected to the positioning nails, and the structural concrete body wraps the outer layer bidirectional reinforcing mesh and is covered and connected to the inner side of the polyurethane layer;
the structural layer comprises an inner-layer bidirectional reinforcing mesh and a structural concrete body; the inner-layer bidirectional reinforcing mesh is connected to the positioning nails, so that the inner-layer bidirectional reinforcing mesh, the outer-layer bidirectional reinforcing mesh and the positioning nails form a double-layer bidirectional reinforcing mesh which is connected together; the structural concrete body wraps the inner-layer bidirectional reinforcing mesh and is connected to the inner side of the structural concrete body in a covering mode.
2. The air film engineered extra large diameter thin shell dome structure of claim 1, wherein: the polyurethane layer is formed in a layered spraying mode, and the thickness of each layer is 2-3 cm.
3. The air film engineered extra large diameter thin shell dome structure of claim 1, wherein:
the positioning nails are exposed out of the polyurethane layer by 3-5 cm.
4. The air film engineered extra large diameter thin shell dome structure of claim 1, wherein:
the positioning nails are respectively perpendicular to the tangent plane of the dome at the position of the dome.
5. The air film engineered extra large diameter thin shell dome structure of claim 1, wherein: the lower end of the air film is fixed on the foundation ring beam.
6. The air film applied extra large diameter thin shell dome structure of claim 5, wherein:
a horizontal bottom plate is padded on the top surface of the foundation ring beam and fixedly connected to a circle of embedded pieces embedded in the foundation ring beam;
the air film layer is characterized in that a connecting ring plate is connected to the horizontal bottom plate in an inclined mode, a pressing plate is arranged outside the connecting ring plate, and the pressing plate is connected with the connecting ring plate through bolts and can clamp the lower end of the air film layer between the pressing plate and the connecting ring plate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022378060.0U CN213868296U (en) | 2020-10-23 | 2020-10-23 | Ultra-large-diameter thin-shell dome structure constructed by air film method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022378060.0U CN213868296U (en) | 2020-10-23 | 2020-10-23 | Ultra-large-diameter thin-shell dome structure constructed by air film method |
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| CN213868296U true CN213868296U (en) | 2021-08-03 |
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| CN202022378060.0U Active CN213868296U (en) | 2020-10-23 | 2020-10-23 | Ultra-large-diameter thin-shell dome structure constructed by air film method |
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