CN208088625U - Large-span concrete bucket shape grid shell roof structure - Google Patents

Abstract

The utility model discloses a kind of large-span concrete bucket shape grid shell roof structure, the structure of the utility model, which by 4 pieces tiltedly puts the close rib tablet kept flat with 1 piece and crosses, to be constituted, and intersection is ridge, and for structure support on lower periphery frame, periphery sets drainage gutter.The structure fabrication of the utility model uses cast-in-place or prefabrication and assembly construction method, cast-in-place to pour whole concrete in full hall template；When prefabrication and assembly construction, concrete is connected in floor manufacture roof boarding and cross rib, then on-site consolidation after-pouring.The structure of the utility model can be used for public building, have the advantages that rigidity is big, high capacity, easy for construction, maintenance cost is low.

Description

Large-span concrete bucket shape grid shell roof structure

Technical field

The utility model is related to a kind of large-span concrete pentahedron curtain shape grid shell roof structures, belong to building concrete knot Structure technical field.

Background technology

The thin-walled space structure that concrete curtain structure is made of equal thickness tablet is generally used for column away from for 8m~10m Small span ones superstructure or roof system, rise is generally 1/12~1/8 (Luo Fu noon of span《Building structure concept system with estimate It calculates》Beijing：Publishing house of Tsinghua University, in October, 1991 first edition).The tablet for forming curtain structure is connected with each other by crease, folding Seam is the equal of the elastic bearing of tablet, therefore the strength and stiffness of curtain structure are in addition to the bending stiffness depending on tablet, also with The bending stiffness of crease is closely related, and the bending stiffness of crease depends on the thickness and its intersection angle of tablet.It is general and Speech, the angle between tablet is smaller, the roof system overall stiffness and rigidity of crease is bigger in effective width, this is to reducing curtain structure Deformation be advantageous, but stress concentration at crease influences more apparent, is unfavorable, therefore curtain again to structure total bearing capacity The crease of structure need to usually make reinforcement processing, but the effective sectional area of crease is too small after all, can increase Construction treatment difficulty, this Outside, the total bearing capacity of curtain structure is also controlled by corner region Punching Shear and bearing strength, therefore corner area is logical in Practical Project Plate thickness need to often be increased to improve its bearing capacity.Due to disadvantages mentioned above, the curtain structure that tablet crosses is used in long span building very Hardly possible obtains preferable technical-economic index, therefore after the proposition of last century the '30s, curtain structure is less to answer in Practical Project With.

Utility model content

The technical problems to be solved in the utility model is to provide a kind of concrete bucket shape net for the curtain shape roof system of public building Shell structure.

The formation problems of middle roof system, the technical solution adopted in the utility model are to solve above-mentioned technical problem：Using close Rib tablet cross large span be inverted bucket shape roof structure, i.e., four pieces of trapezoidal close rib tablets are placed in four sides of building and tiltedly put, Four walls for being inverted bucket are formed, the bottom surface for being inverted bucket is the flat-top of roof system, also uses close rib tablet, is formed by concrete bucket shape net There are shell 5 faces, the intersection of the close rib tablet intersected two-by-two to form the crestal line of roof system, and crestal line is arched girder, and sectional dimension is more than Drainage gutter is arranged in the girt strip of close rib tablet, roof system surrounding.

The making problem of middle roof system, the technical solution adopted in the utility model one are to solve above-mentioned technical problem：Full Cast-in-place concrete makes bucket shape grid shell roof on hall scaffold, and implementation step is：(1) full hall scaffold is set up；(2) day is placed The template of ditch and close rib tablet and assembling reinforcement；(3) gutter, rib and roofing board concrete are poured；(4) it is strong to reach design for concrete After degree, scaffold and template are removed.This technical solution need take measures control slope concrete it is cast-in-place when trickling problem.

The making problem of middle roof system to solve above-mentioned technical problem, the technical solution adopted in the utility model second is that：Gutter With crestal line cast-in-place concrete, roof boarding and the prefabricated rear scene of rib carry out assembly, then cast-in-place concrete is attached, implementation step For：(1) prepared roofing tablet, and the rib of close rib tablet is prefabricated into cross and reserves the coagulation that need to be poured when roof boarding connection Soil thickness；(2) full hall scaffold is set up, cast-in-place concrete after gutter and crestal line arched girder reinforcing bar is bound；(3) prefabricated rib is placed, even The vertical muscle at rib end simultaneously binds rib top reinforcing bar.(4) prepared roofing tablet is placed.(5) coagulation of rib join domain and rib top is poured Soil.(6) cast-in-place concrete removes scaffold after reaching design strength.

The utility model has the beneficial effects that：(1) go out large span bucket shape latticed shell structure with close rib tablet intersecting sites, for public affairs The roof structure built of building together provides a kind of alternative construction moulding, also enriches the structure type of concrete reticulated shell；(2) with by putting down The curtain structure that plate crosses is compared, and the Out-of Plane Stiffness of the plate of composed structure is enhanced using close rib tablet, thus can make bucket shape Latticed shell structure crosses over the space of bigger, has expanded the use span of structure；(3) crestal line uses arched girder, is equivalent to and strengthens tradition The crestal line of curtain structure, and the manufacture difficulty of crestal line is reduced, form the stronger load pipeline of roof system；(4) side of roof system Edge support conditions can be set as periphery supporting, multi-point support or angle point supporting, when for angle point supporting, roof system angular region according to span Load is mainly transmitted by tilting crestal line beam, efficiently solves the problems, such as the Punching Shear and pressure-bearing in traditional curtain structure corner region.Relatively In concrete surface shape shell structure, curtain structure has the advantages that construction is convenient since template is straight.In order to be built in large span It builds and applies curtain structure in roof project, the advantages of the utility model is based on the two-way power transmission of close rib tablet, crossed using close rib tablet Go out the bucket shape grid shell roof structure in large-span concrete curtain structure, the crestal line that crosses of close rib tablet is arched girder, the utility model On the one hand the Out-of Plane Stiffness for improving the plate of composition curtain structure, on the other hand reduces the construction difficulty of crestal line, expands curtain Structure is used as span when roof system, also improves the overall stiffness and intensity of structure, enriches concrete Spatial Lattice Shells Pattern.

Description of the drawings

Fig. 1 is the space schematic diagram of the utility model large-span concrete bucket shape grid shell roof structure；

Fig. 2 is the floor map of Fig. 1；

Fig. 3 is that the crestal line of the utility model large-span concrete bucket shape grid shell roof structure crosses schematic diagram；

Fig. 4 is the A-A diagrammatic cross-sections of Fig. 2；

Fig. 5 is the B-B diagrammatic cross-sections of Fig. 2；

Fig. 6 is the cancellated structure schematic diagram of the utility model large-span concrete bucket shape grid shell roof structure；

Fig. 7 is the schematic diagram that crosses of the utility model large-span concrete bucket shape grid shell roof structure flat-top and oblique top；

Fig. 8 is the schematic diagram that crosses of the utility model large-span concrete bucket shape grid shell roof structure gutter and oblique top；

Fig. 9 pours sequential schematic when being the cast-in-place making of the utility model large-span concrete bucket shape grid shell roof structure；

Figure 10 is prefabricated room panel schematic diagram；

Figure 11 is the prefabricated cross schematic diagram of roofing rib；

Spatial position schematic diagram when Figure 12 places for the prefabricated cross of prefabricated room panel and rib；

Figure 13 is prefabricated rib end node connection structure diagram.

Reference sign：1- ribs；2- roof boardings；3- backbone line arched girders；4- pair crestal line beams；5- gutter ribs；6- gutters seal Mouth beam；7- marginal frame beams；8- gutter plates；9- frame columns；10- ribs indulge muscle tie point.

Specific implementation mode

With reference to embodiment, the utility model is described in further detail, but not as any limit to the utility model System.

Refering to fig. 1~Fig. 3, a kind of large-span concrete bucket shape grid shell roof structure, by trapezoidal tilting close rib tablet and square The close rib tablet composition of shape horizontal, close rib tablet are made of rib 1 and roof boarding 2；There are four Sloping roof and one altogether for the shape of reticulated shell A flat roof deck, the intersection between Sloping roof are secondary crestal line beam 4, and the intersection of Sloping roof and flat roof deck is main crestal line arched girder 3；Reticulated shell bottom The gutter being made of gutter rib 5, gutter plate 8 and gutter sealing beam 6 is equipped with around portion；Grid shell roof is supported on marginal frame beam 7, Marginal frame beam 7 is supported on again on frame column 9.

Refering to Fig. 4 and Fig. 5, the depth of section of the reticulated shell backbone line arched girder 3 is more than the depth of section of close rib tablet rib 1, Span need to make haunch when larger in the slope foot of backbone line arched girder 3；Secondary crestal line 4 is identical as backbone line 3 depth of sections of arched girder.

Refering to Fig. 6~Fig. 8, the grid of the reticulated shell is rectangle plane grid, and a, b illustrate size of mesh opening；Flat roof deck with tiltedly The rib 1 and roof boarding 2 of roofing keep flat section conversion backbone line arched girder 3, and the rib 1 and roof boarding 2 of the reticulated shell slope foot are in frame It sets a roof beam in place and realizes on 7 and converted with the connection of gutter rib 5 and gutter plate 8；Gutter sealing beam 6 need to be higher by gutter plate face.

The utility model need to again be implemented after the bottom absolute altitude of concreting to marginal frame beam 7.

Specific embodiment 1：It is made of cast-in-place concrete mode, specific implementation step is：

(1) after setting up full hall scaffold, marginal frame beam 7, gutter rib 5, gutter sealing beam 6, backbone line arched girder 3, pair are placed The bed die of crestal line beam 4 and rib 1；

(2) marginal frame beam 7, gutter rib 5, gutter sealing beam 6, backbone line arched girder 3, secondary 4 and of crestal line beam are bound on bed die The reinforcing bar of rib 1, and the synchronous side form for placing above-mentioned component；

(3) bed die of gutter plate 8 and roof boarding 2, the steel of binding gutter plate 8 and roof boarding 2 are placed on full hall scaffold Muscle；

(4) refering to Fig. 9, from the symmetrical casting concrete of bottom to top；It needs to draw by the spacing of 3~5m after having poured gutter concrete Divide concreting region, Sloping roof that steel wire partition board need to be set by the spacing of 1m on roof boarding 2 before pouring；

(5) after the concrete finally poured reaches design strength, scaffold and whole templates are symmetrically removed from outside to inside.

Specific embodiment 2：It is made of prefabrication and assembly construction mode, specific implementation step is：

(1) refering to Fig. 6, Figure 10 and Figure 11, prefabricated room panel 2, rib 1 is made as cross in advance by grid midpoint；

(2) refering to fig. 1 and Fig. 3, full hall scaffold is set up, gutter rib 5, gutter sealing beam 6, marginal frame beam 7, backbone are placed The bed die of line arched girder 3, secondary crestal line beam 4, and place its side form after binding the reinforcing bar of above-mentioned component；Place the bed die of gutter plate 8 simultaneously Assembling reinforcement；

(3) gutter rib 5, gutter sealing beam 6, gutter plate 8, marginal frame beam 7, backbone line arched girder 3, secondary crestal line beam 4 are poured Concrete, concreting thickness need to reserve the thickness δ of roof boarding 2；Marginal frame beam 7, backbone line arched girder 3 and secondary crestal line beam 4 Side need to reserve the connector reinforcing bar of rib 1.

(4) 2 and Figure 13, the prefabricated cross of placement rib 1, correction bit postpone the connection at vertical muscle tie point 10 refering to fig. 1 Vertical muscle on rib；Place the side form of junction.

(5) after muscle is indulged in the top surface of binding rib 1, the concrete in δ thickness ranges is poured.

(6) whole scaffolds are symmetrically removed from outside to inside after the concrete finally poured reaches design strength, and tear open The side form of lower 1 connector area of rib.

Although the preferred embodiments of the utility model are described in above-mentioned combination attached drawing, above-mentioned specific implementation mode It is only schematical, and be not it is restrictive, those skilled in the art under the objective enlightenment of the utility model, The accommodation made in the rights protection scope for not departing from the utility model, it is within the protection scope of the present utility model.

Claims (3)

1. a kind of large-span concrete bucket shape grid shell roof structure, it is characterised in that：Structure by 4 pieces tiltedly put trapezoidal close rib tablet and 1 piece keeps flat the close rib tablet of rectangle and crosses into inversion bucket shape in space, and intersection is flat back line beam and oblique ridge line beam；Roof system periphery sets day Ditch rear support is in substructure；Close rib tablet is by rib（1）And roof boarding（2）Composition；There are four oblique rooms altogether for the shape of reticulated shell Face and a flat roof deck, the intersection between Sloping roof are secondary crestal line beam（4）, the intersection of Sloping roof and flat roof deck is main crestal line arched girder （3）；Reticulated shell bottom periphery is equipped with by gutter rib（5）, gutter plate（8）Beam is sealed with gutter（6）The gutter of composition；Grid shell roof branch It holds in marginal frame beam（7）On, marginal frame beam（7）It is supported on frame column again（9）On.

2. large-span concrete bucket shape grid shell roof structure according to claim 1, it is characterised in that：The net of close rib tablet Lattice are orthogonal grid or three-way grid, and the grid number per side is all higher than 5 lattice.

3. large-span concrete bucket shape grid shell roof structure according to claim 1, it is characterised in that：Trapezoidal close rib tablet The upper backbone line arched girder that structure is collectively formed with the rib that flat back line beam intersects in same plane.