CN110886392A - Laminated arch shell structure and construction method thereof - Google Patents
Laminated arch shell structure and construction method thereof Download PDFInfo
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- CN110886392A CN110886392A CN201911141574.XA CN201911141574A CN110886392A CN 110886392 A CN110886392 A CN 110886392A CN 201911141574 A CN201911141574 A CN 201911141574A CN 110886392 A CN110886392 A CN 110886392A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/32—Arched structures; Vaulted structures; Folded structures
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D4/00—Arch-type bridges
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Abstract
The invention discloses a superposed arch shell structure and a construction method thereof, relating to the technical field of construction of constructional engineering and comprising a prefabricated part and a cast-in-place part, wherein the cast-in-place part is arranged on the upper surface of the prefabricated part and is in an arch shape; the prefabricated part comprises a plurality of prefabricated arch shell units which are distributed along the direction vertical to the span direction of the prefabricated arch shell units, and gaps between the adjacent prefabricated arch shell units form seams among the arch shell units; the cast-in-place portion seams are formed by boundary lines between the cast-in-place portions, and the cast-in-place portion seams are located between the seams between the adjacent arch shell units on the plane. Aiming at the problem that the existing technology can not be applied to the arch shell structure, the invention adopts the superposed structure of the arch reinforced concrete, is applicable to the construction of the arch structure and the bridge, and has the advantages of high construction speed and high structure precision.
Description
Technical Field
The invention relates to the technical field of construction of constructional engineering, in particular to a superposed arch shell structure and a construction method thereof.
Background
When the reinforced concrete engineering construction is carried out, the laminated structure is widely applied due to the advantages of high construction speed, high structure precision and the like.
The existing laminated structure includes laminated beams, laminated slabs and the like, and the laminated slab is shown in fig. 1. In fig. 1 the laminated slab consists of a prefabricated part 1 and a cast-in-place part 2, the prefabricated part 1 being in the lower part of the laminated structure and the cast-in-place part 2 being in the upper part of the laminated structure. During construction, the prefabricated part 1 is installed in place by using an assembling method, then steel bars are bound and concrete is poured above the prefabricated part 1, construction of the cast-in-place part 2 is completed, and finally a superposed structure is formed. When the overall structure is an arch shell structure, the above-described flat plate laminated structure form cannot be applied, and a laminated structure adaptable to the arch shell structure and a related construction method are required.
Disclosure of Invention
Aiming at the problem that the prior art cannot be applied to the arch shell structure, the invention aims to provide a superposed arch shell structure and a construction method thereof, and the superposed arch shell structure has the advantage of being suitable for the arch shell structure.
In order to achieve the purpose, the invention provides the following technical scheme:
a superposed arch shell structure comprises a prefabricated part and a cast-in-place part, wherein the cast-in-place part is arranged on the upper surface of the prefabricated part, and the prefabricated part and the cast-in-place part are both in an arch shape;
the prefabricated part comprises a plurality of prefabricated arched shell units distributed along the direction perpendicular to the span direction of the prefabricated arched shell units, and gaps between the adjacent prefabricated arched shell units form joints among the arched shell units;
the cast-in-place portion seams are formed by boundary lines between the cast-in-place portions, and the cast-in-place portion seams are located between the seams between the adjacent arch shell units on the plane.
By the technical scheme, the superposed structure in the reinforced concrete engineering is made into an arch, is particularly suitable for the construction of arch structures and bridges, and has the advantages of high construction speed and high structure precision; in addition, cast-in-place partial seam lies in between the seam between the adjacent hunch shell unit on the plane, can not only ensure the stability of coincide hunch shell structure, can also increase the rivers infiltration route of coincide hunch shell structure, then improves the waterproof performance of structure.
Furthermore, the prefabricated arch shell unit is of a three-hinged arch structure and comprises two identical and oppositely arranged prefabricated arch plates.
Through above-mentioned technical scheme, adopt three hinge arch structures to be used for when guaranteeing structural stability, the size of less prefab makes things convenient for the transportation and the handling of prefab then.
Furthermore, the prefabricated arch bar comprises a bottom plate, one side of the bottom plate is integrally provided with a reinforcing rib beam along the span direction of the bottom plate, and reinforcing fluid is integrally arranged between the two sides of the reinforcing rib beam and the bottom plate;
the section of the prefabricated part is in an inverted pi-shaped structure, the bottom plate is positioned at the bottom, and two reinforcing rib beams are arranged above the bottom plate;
and rib beam main reinforcements and stirrups are arranged in the reinforcing rib beams along the length direction of the reinforcing rib beams.
According to the technical scheme, the reinforcing rib beams and the reinforcing fluid are arranged on the bottom plate, so that the structural strength of the prefabricated arch plate is enhanced, and the deformation in the distribution and transportation process is avoided; and a main rib and a stirrup of the rib beam are arranged in the reinforced rib beam, so that the structural strength of the prefabricated arch plate is further improved.
Furthermore, a lower main rib is arranged in the bottom plate along the span direction of the bottom plate, and a plurality of double limb hoops are embedded in the bottom plate;
the open end of the double-limb hoop is arranged in the cast-in-place part, the other end of the double-limb hoop is arranged in the bottom plate, and the lower main rib is arranged in the bottom end of the double-limb hoop.
Through the technical scheme, the two ends of the double-limb hoop are respectively positioned in the cast-in-place part and the prefabricated part, so that the effect of improving the connection strength is achieved; in addition, will descend the main muscle to set up in the bottom of two limbs hoops, the pre-buried intensity to the prefabricated part in two limbs hoops of reinforcing.
Furthermore, truss steel bars are arranged between the prefabricated part and the cast-in-place part;
the truss steel bar comprises a lower chord member embedded in the prefabricated part in the span direction and an upper chord member embedded in the prefabricated part in the span direction, a web member is fixed between the lower chord member and the upper chord member, the web member is partially embedded in the prefabricated part, and the other part of the web member is embedded in the cast-in-place part;
the truss reinforcing steel bars are arranged one by one at certain intervals along the span direction of the prefabricated part.
Through above-mentioned technical scheme, the truss reinforcing bar has three effects: firstly, the connecting steel bar is used as a connecting steel bar of a prefabricated part and a cast-in-place part, and the prefabricated part and the cast-in-place part can be used as a whole to act together when the structure is stressed; secondly, the section of the prefabricated part is inverted pi-shaped, so that the truss steel bars serve as structural stress bars for bearing construction load when the prefabricated part is hoisted and concrete is cast in situ; and thirdly, welding the truss steel bars of each prefabricated unit to form longitudinal through long steel bars of the whole structure.
Furthermore, two sides of the prefabricated part are provided with arch seats for supporting;
the lower main rib in the prefabricated arch bar is connected with the main rib on the arch support through the cold extrusion sleeve at the arch foot, and is connected with the lower row of main ribs corresponding to the arch top of the prefabricated arch bar through the cold extrusion sleeve at the arch top.
Through the technical scheme, the cold extrusion sleeve is used for connecting the two prefabricated arch plate arches at the arch crown and connecting the arch springing and the arch base of the prefabricated arch plate.
Furthermore, the plate joint structure between the prefabricated arch shell units is composed of steps of adjacent prefabricated units, galvanized steel plates, the end parts of the upper chords and the lower chords, the galvanized steel plates are placed on the steps, a layer of waterproof mortar with the thickness of 20mm is arranged above the galvanized steel plates, the waterproof mortar is laid along the length direction of the galvanized steel plates, the laying width is larger than the width of the galvanized steel plates, each edge exceeds the galvanized steel plates by not less than 20mm, and the end parts of the upper chords and the end parts of the lower chords on two sides are connected in a welding mode.
According to the technical scheme, firstly, the galvanized steel plate is connected with the lower chord and the upper chord on two sides of the gap, so that the connection strength of the two prefabricated arch plate arches at the arch crown is improved; secondly, the galvanized steel plate plugs the gap of the two prefabricated arch plate arches at the arch crown, so that concrete can be conveniently poured at the upper part subsequently, and a cast-in-place part is formed.
Furthermore, an upper main rib is arranged in the cast-in-place part along the span direction of the cast-in-place part, the upper main rib and the lower main rib are arranged in the prefabricated part in a radial alignment manner, and the upper main rib is positioned in a hook at the opening of the double limb hoop.
Through the technical scheme, the hook at the opening of the double-limb hoop hooks the upper main rib, so that the connection strength of the double-limb hoop and the cast-in-place part is further improved.
Furthermore, the lower surface of the prefabricated arch plate is smooth, and the surfaces of the upper part of the prefabricated arch plate are roughened.
By the technical scheme, the lower part of the structure is prefabricated in a factory due to the laminated structure, and then concrete is cast in situ above the prefabricated parts on site to form the whole structure. The lower surface of the prefabricated part is the lower surface of the whole structure and can be seen by people, so that the surface is required to be smooth, and the effect of fair-faced concrete is achieved. The upper surface of the prefabricated member is combined with the cast-in-place part later, and in order to keep the combination between the prefabricated member and the cast-in-place part tight and bear force together, the requirement is rough, the combination effect on a concrete interface is good, and the phenomenon of 'two skins' cannot be generated.
A construction method of a laminated arch shell structure comprises the following steps:
step 3, after all the prefabricated arch shell units are installed, placing galvanized steel plates on joints among the prefabricated arch shell units, laying waterproof mortar, and connecting truss lower chords and truss upper chords on two sides of the joints by using electric welding;
and 5, constructing a cast-in-place part of the superposed arch shell structure.
According to the technical scheme, after all the prefabricated units are completely finished, reinforcing steel bars are bound on site, and part of operation is performed in a cast-in-place mode, so that the development guidance of the fabricated building is met, heavy formwork supporting work on site is eliminated, and the construction efficiency is improved; the prefabricated arch bar has high precision and good appearance, and is easy to realize the sensory effect of the fair-faced concrete.
Compared with the prior art, the invention has the beneficial effects that:
(1) the arched reinforced concrete superposed structure is designed, so that the construction of an arched structure or a bridge construction project can be completed quickly and accurately; in addition, the seams of the cast-in-place part are positioned between the seams between the adjacent arch shell units on the plane, so that the stability of the superposed arch shell structure can be ensured, the permeation path of the superposed arch shell structure can be increased, and the waterproof performance of the structure is improved;
(2) furthermore, the structural strength is enhanced by additionally arranging the reinforcing rib beam, the deformation in the hoisting and mounting process is prevented, the mounting precision is ensured, and in addition, truss steel bars are arranged on the cast-in-place part and the prefabricated part, so that the structural strength is enhanced, the connection strength of the cast-in-place part and the prefabricated part is improved, and the dislocation slippage of the cast-in-place part and the prefabricated part is avoided;
(3) the prefabricated arch bar has high precision and good appearance, is easy to realize the sensory effect of the fair-faced concrete, and in addition, the method cancels the heavy formwork supporting work on site, thereby improving the construction efficiency.
Drawings
FIG. 1 is a schematic view of the overall structure of a prior art lamination;
FIG. 2 is a schematic structural diagram of the present embodiment;
FIG. 3 is a plan view of a prefabricated part;
FIG. 4 is a plan view of a cast-in-place section;
FIG. 5 is a schematic view of the main rib structure of the laminated arched shell structure;
FIG. 6 is a schematic structural view of a prefabricated arch shell unit;
FIG. 7 is a front view of a precast arch;
FIG. 8 is a top plan view of a precast arch;
FIG. 9 is a cross-sectional view of a precast arch;
FIG. 10 is a schematic structural view of reinforcing bars in the precast arch slab;
FIG. 11 is a schematic view of the construction of the truss reinforcement;
FIG. 12 is a schematic view of the arch support reinforcement connection structure;
FIG. 13 is a schematic view of a dome rebar junction;
FIG. 14 is a schematic view of a reinforcing bar connection structure at the slab joint of the prefabricated arch slab;
FIG. 15 is a schematic structural view of the upper main reinforcement lashing;
fig. 16 is a schematic view of a poured laminated arch shell structure.
Reference numerals: 1. a prefabricated part; 2. a cast-in-place part; 4. prefabricating an arch shell unit; 5. joints among the arch shell units; 6. an arch support; 7. a seam of the cast-in-place part; 8. a lower main rib; 9. upper main ribs; 10. prefabricating an arch bar; 11. a base plate; 12. lifting lugs; 13. reinforcing the rib beam; 14. fluid strengthening; 15. a step; 16. truss reinforcing steel bars; 17. a double limb hoop; 18. hooping; 19. a rib beam main rib; 20. an upper chord; 21. a web member; 22. a lower chord; 24. a main steel bar; 25. cold extruding the sleeve; 26. a galvanized steel sheet; 27. connecting steel bars on the lower chord of the truss; 28. the upper chord of the truss is connected with the steel bar.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
A laminated arch shell structure is shown in figure 2 and is a reinforced concrete structure and comprises a prefabricated part 1 and a cast-in-place part 2, wherein the prefabricated part 1 and the cast-in-place part 2 are both in an arch shape, and the prefabricated part 1 is fixed on the inner wall of the cast-in-place part 2.
As shown in fig. 3, the prefabricated part 1 is composed of a plurality of prefabricated arch shell units 4, the prefabricated arch shell units 4 are placed on arch bases 6 on two sides one by one along a direction perpendicular to the direction spanned by the prefabricated arch shell units 4, gaps between every two prefabricated arch shell units 4 form arch shell unit-to-unit seams 5, and all the prefabricated arch shell units 4 are identical. The plan view of the cast-in-place part 2 is shown in fig. 4, two sides of the cast-in-place part 2 are archways 6, the width of the cast-in-place part 2 is integral multiple of the width of the prefabricated arch shell unit 4, and the specific width value is determined by the characteristics of concrete (the direction perpendicular to the crossing direction of the prefabricated arch shell unit 4 is called the width direction). The boundary between the cast-in-place parts 2 forms a cast-in-place part joint 7, and the cast-in-place part joint 7 is positioned in the middle of the joint 5 (shown by a dotted line) between two parallel arch shell units in the plane; as shown in fig. 5, an upper main rib 9 is arranged in the cast-in-place part 2 along the span direction, and a lower main rib 8 is arranged in the prefabricated part 1.
As shown in fig. 6 and 7, the prefabricated arch shell unit 4 is a three-hinged arch structure, which is composed of two identical prefabricated arch boards 10, and the prefabricated arch boards 10 are arch structures, and both the arch top and the arch foot are hinged points.
As shown in fig. 7 and 8, the precast arch panel 10 is composed of two reinforcing ribs 13, four reinforcing blades 14 and a bottom plate 11, which are arranged throughout the span direction of the precast arch panel 10, and four lifting lugs 12 are uniformly arranged on the reinforcing ribs 13.
As shown in fig. 9, the precast arch panel 10 has an inverted-pi cross section, two reinforcing ribs 13 are provided at an upper portion of the cross section, a floor panel 11 is provided at a lower portion, and a lower portion of each reinforcing rib 13 is connected to the floor panel 11. Reinforcing tucks 14 are arranged on two sides of the joint of the reinforcing rib beam 13 and the bottom plate 11. The thickness of the bottom plate 11 is 30% of the thickness of the laminated arch shell structure plate, and the height of the reinforcing rib beam 13 is equal to the thickness of the bottom plate 11. The width of the single reinforcing rib 13 is 5% -8% of the width of the whole section. Two sides of the bottom plate 11 are respectively provided with a step 15, and the height of the step 15 is 20% of the thickness of the bottom plate 11. The two reinforcing rib beams 13 are respectively positioned at the left side and the right side of the vertical center line of the cross section, the whole cross section is symmetrical left and right relative to the vertical center line, the lower surface of the prefabricated arch slab 10 is smooth, and the surfaces of the upper part of the prefabricated arch slab are roughened.
The arrangement of the ribs of the prefabricated arch slab 10 is shown in fig. 10, a bottom plate 11 of the prefabricated arch slab 10 is internally provided with a lower main rib 8 of a superposed arch shell structure, and the lower main rib 8 is arranged along the span direction of the prefabricated arch slab 10; a full-length truss reinforcing steel bar 16 and a group of open-top double-limb hoops 17 are arranged in the direction vertical to the span of the prefabricated arch slab 10, an even number of open-top double-limb hoops 17 are arranged in each group of open-top double-limb hoops 17, the even number of open-top double-limb hoops 17 are uniformly distributed, and one open-top double-limb hoop 17 is arranged in each of the two reinforcing ribs 13; the truss steel bars 16 and the open double-limb hoops 17 are arranged one by one at certain intervals along the span direction of the prefabricated arch slab 10; the reinforcing rib beam 13 is internally provided with a lower main rib 8 of a superposed arch shell structure, a rib beam main rib 19, a stirrup 18 and a double-limb hoop 17 with an open top end. The open end of the open double limb hoop 17 is located above the pre-fabricated arch 10 and the closed end is located within the pre-fabricated arch 10. The lower main ribs 8 are arranged along the span direction of the prefabricated arch slab 10, the stirrups 18 and the open double-limb hoops 17 are arranged at intervals along the span direction of the prefabricated arch slab 10, two rows of the lower main ribs 8 are arranged in each open double-limb hoop 17, and the open double-limb hoops 17 are symmetrical left and right about the vertical center line of the cross section of the prefabricated arch slab 10.
As shown in fig. 11, the truss reinforcing bars 16 are arranged throughout the length in the direction perpendicular to the span direction of the prefabricated arch bar 10, and are formed by welding a lower chord 22, a web member 21 and an upper chord 20, the lower chord 22 is located in the prefabricated arch bar 10, one part of the web member 21 is located in the prefabricated arch bar 10, the other part is located above the prefabricated arch bar 10, the upper chord 20 is located above the prefabricated arch bar 10, and the lower main ribs 8 are bound with the lower chord 22 of the truss reinforcing bars 16.
The lower chord 22 and the upper chord 20 of the truss steel bar 16 between the adjacent prefabricated arch shell units 4 are welded and connected after the prefabricated arch shell units 4 are assembled on site, so that the longitudinal full-length steel bar of the laminated structure is formed (the longitudinal direction here refers to the longitudinal direction of the integral structure and is perpendicular to the span direction of the prefabricated units).
As shown in fig. 12 and 13, the lower main rib 8 in the prefabricated arch bar 10 is connected with the main steel rib 24 of the arch base 6 at the arch springing position through the cold extrusion sleeve 25, and the upper main rib 9 is also connected with the main steel rib 24 of the arch base 6 through the cold extrusion sleeve 25; the lower main ribs 8 in the prefabricated arch slabs 10 on both sides are connected at the arch top through cold extrusion sleeves 25.
As shown in fig. 14, a galvanized steel plate 26 is placed above the step 15 along the length of the inter-arch shell unit joint 5 to seal the inter-arch shell unit joint 5, and then truss lower chord connecting steel bars 27 and truss upper chord connecting steel bars 28 are used to connect the corresponding truss steel bars 16 on both sides of the inter-arch shell unit joint 5 respectively. The slab joint structure between the prefabricated arch shell units 4 is composed of steps 15 of adjacent prefabricated arch shell units 4, galvanized steel plates 26, the end parts of the upper chords 20 and the lower chords 22, the galvanized steel plates 26 are placed on the steps 15, a layer of waterproof mortar with the thickness of 20mm is arranged above the galvanized steel plates 26, the waterproof mortar is laid along the length direction of the galvanized steel plates 26, the laying width is larger than the width of the galvanized steel plates 26, each edge exceeds the galvanized steel plates 26 by not less than 20mm, and the end parts of the upper chords 20 and the end parts of the lower chords 22 on the two sides are connected in a welding mode.
As shown in fig. 15, the upper main rib 9 and the lower main rib 8 of the laminated arch shell structure are aligned in the thickness direction of the laminated arch shell, and the upper main rib 9 is arranged in a hook at the opening end of the open double-limb hoop 17.
The poured superposed arch shell structure is as shown in fig. 16, the prefabricated arch shell units 4 are arranged in a vertical span direction one by one, the joints 5 between the prefabricated arch shell units 4 are formed, and concrete is poured above the prefabricated arch shell units 4 to form the cast-in-place parts 2 of the superposed arch shell.
The construction method of the invention is as follows: firstly, assembling the prefabricated arch shell units 4, then placing galvanized steel plates 26 on gaps among the prefabricated arch shell units 4, connecting the lower chord 22 and the upper chord 20 of the truss reinforcing steel bars 16 in a welding mode, then binding the upper main bars 9 of the superposed arch shell structure, and finally carrying out construction of the cast-in-place part 2 to finish construction of the superposed arch shell structure.
In summary, the following steps:
when the invention is used, the arched reinforced concrete superposed structure is designed, which is convenient for rapidly and precisely completing tunnel construction or bridge construction engineering; in addition, the cast-in-place part joint 7 is positioned between the joints 5 between the adjacent arch shell units on the plane, so that the stability of the superposed arch shell structure can be ensured, the permeation path of the superposed arch shell structure can be increased, and the waterproof performance of the structure is improved; the reinforcing rib beam 13 is additionally arranged, so that the structural strength is enhanced, the deformation in the hoisting and installation process is prevented, the installation precision is ensured, in addition, the truss steel bars 16 are arranged on the cast-in-place part 2 and the prefabricated part 1, the structural strength is enhanced, the connection strength of the cast-in-place part 2 and the prefabricated part 1 is improved, and the dislocation slippage of the cast-in-place part 2 and the prefabricated part 1 relative to each other is avoided; the prefabricated arch bar 10 has high precision and good appearance, and is easy to realize the sensory effect of the fair-faced concrete; in addition, in the method, heavy formwork supporting work on site is eliminated, and the construction efficiency is improved.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (10)
1. A laminated arched shell structure comprises a prefabricated part (1) and a cast-in-place part (2), wherein the cast-in-place part (2) is arranged on the upper surface of the prefabricated part (1), and is characterized in that the prefabricated part (1) and the cast-in-place part (2) are both in an arched shape;
the prefabricated part (1) comprises a plurality of prefabricated arched shell units (4) distributed along the direction perpendicular to the span direction of the prefabricated arched shell units, and gaps between the adjacent prefabricated arched shell units (4) form arched shell unit seams (5);
the cast-in-place part joints (7) are formed by the boundary lines between the cast-in-place parts (2), and the cast-in-place part joints (7) are located between the adjacent arched shell unit joints (5) on the plane.
2. A laminated arched shell structure according to claim 1, characterised in that the prefabricated arched shell elements (4) are of a three-hinged arch structure, comprising two identical and oppositely arranged prefabricated arched plates (10).
3. A laminated arch shell structure according to claim 2, wherein the prefabricated arch slab (10) comprises a bottom plate (11), one side of the bottom plate (11) is integrally provided with a reinforcing rib beam (13) along the span direction thereof, and reinforcing fluid pockets (14) are integrally arranged between both sides of the reinforcing rib beam (13) and the bottom plate (11);
the section of the prefabricated arch bar (10) is inverted pi-shaped, the bottom plate (11) is positioned at the bottom, and two reinforcing rib beams (13) are arranged above the bottom plate (11);
and a main rib (19) and a stirrup (18) are arranged in the reinforcing rib beam (13) along the length direction of the reinforcing rib beam.
4. A laminated arched shell structure according to claim 3, characterised in that the bottom plate (11) is internally provided with a lower main rib (8) along the span thereof, and the bottom plate (11) is internally provided with a plurality of double limb hoops (17);
the open end of the double-limb hoop (17) is arranged in the cast-in-place part (2), the other end of the double-limb hoop is arranged in the bottom plate (11), and the lower main rib (8) is arranged at the bottom of the double-limb hoop (17).
5. A laminated arched shell structure according to claim 4, characterised in that truss reinforcement (16) is provided between the prefabricated part (1) and the cast-in-place part (2);
the truss reinforcing steel bars (16) comprise lower chords (22) embedded in the prefabricated part (1) in the span direction and upper chords (20) embedded in the prefabricated part (1) in the span direction, web members (21) are fixed between the lower chords (22) and the upper chords (20), the web members (21) are partially embedded in the prefabricated part (1), the other portions of the web members are embedded in the cast-in-place part (2), and the truss reinforcing steel bars (16) are arranged one by one at intervals along the span direction of the laminated structure.
6. A laminated arched shell structure according to claim 5, characterised in that the prefabricated parts (1) are provided on both sides with abutments (6) for support;
the lower main rib (8) in the prefabricated arch slab (10) is connected with the main steel rib (24) on the arch support (6) through a cold extrusion sleeve (25) at the arch foot, and is connected with the main steel rib (24) corresponding to the arch top of the prefabricated arch slab (10) through the cold extrusion sleeve (25) at the arch top.
7. A laminated arched shell structure according to claim 6, characterized in that the slab joint structure between the prefabricated arched shell units (4) comprises steps (15) of adjacent prefabricated units, galvanized steel plates (26), upper chord (20) ends and lower chord (22), the galvanized steel plates (26) are placed on the steps (15), a layer of waterproof mortar with the thickness of 20mm is arranged above the galvanized steel plates (26), the waterproof mortar is laid along the length direction of the galvanized steel plates (26) and the width of the waterproof mortar is larger than that of the galvanized steel plates (26), each side exceeds the galvanized steel plates (26) by no less than 20mm, and the upper chord (20) ends and the lower chord (22) ends on two sides are welded together.
8. A laminated arched shell structure according to claim 7, characterised in that the cast-in-place section (2) has an upper main rib (9) arranged along its span, said upper main rib (9) being arranged radially aligned with said lower main rib (8) in the prefabricated section (1), said upper main rib (9) being positioned in a hook at the opening of said double-limb hoop (17).
9. A laminated arched shell structure according to claim 3, characterised in that the lower surface of the pre-fabricated arched plate (10) is smooth, and the respective upper surfaces are roughened.
10. A construction method of a laminated arch shell structure is characterized by comprising the following steps:
step 1, splicing prefabricated arch slabs (10) into prefabricated arch shell units (4) on a construction site;
step 2, mounting the prefabricated arch shell units (4) on the design positions of the arch seats (6) one by one along the direction vertical to the span;
step 3, after all the prefabricated arch shell units (4) are installed, placing galvanized steel plates (26) on joints among the prefabricated arch shell units (4), laying waterproof mortar above the galvanized steel plates (26), and finally connecting truss lower chords (22) and truss upper chords (20) on two sides of the joints by electric welding;
step 4, connecting the arch crown main rib and the arch springing main rib of the prefabricated arch shell unit (4) by using a cold extrusion sleeve (25), and binding and superposing the upper main rib (9) of the arch shell structure;
and 5, constructing a cast-in-place part (2) of the superposed arch shell structure.
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| CN201911141574.XA CN110886392A (en) | 2019-11-20 | 2019-11-20 | Laminated arch shell structure and construction method thereof |
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| CN201911141574.XA CN110886392A (en) | 2019-11-20 | 2019-11-20 | Laminated arch shell structure and construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111851742A (en) * | 2020-07-14 | 2020-10-30 | 四川绿建西宜建设工程有限公司 | Bamboo arch structure of bamboo shop roof and construction process |
-
2019
- 2019-11-20 CN CN201911141574.XA patent/CN110886392A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111851742A (en) * | 2020-07-14 | 2020-10-30 | 四川绿建西宜建设工程有限公司 | Bamboo arch structure of bamboo shop roof and construction process |
| CN111851742B (en) * | 2020-07-14 | 2021-06-25 | 四川绿建西宜建设工程有限公司 | Bamboo arch structure of bamboo shop roof and construction process |
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