CN109281435B - Large-span concave fish belly type double-slope roof truss and installation method thereof - Google Patents
Large-span concave fish belly type double-slope roof truss and installation method thereof Download PDFInfo
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- CN109281435B CN109281435B CN201811368376.2A CN201811368376A CN109281435B CN 109281435 B CN109281435 B CN 109281435B CN 201811368376 A CN201811368376 A CN 201811368376A CN 109281435 B CN109281435 B CN 109281435B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C3/11—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with non-parallel upper and lower edges, e.g. roof trusses
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- E—FIXED CONSTRUCTIONS
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- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
Abstract
A large-span concave fish belly type double-slope roof truss and an installation method thereof comprise a light truss plate area, a reinforced truss unit and an overhanging truss unit; the light truss section is arranged in the middle of the roof truss and comprises a plurality of vertically parallel lower concave fish-bellied light truss units, the reinforced truss units are longitudinally arranged on two sides of the light truss section, and the overhanging truss units are arranged around the roof truss. The positioning lattice column is a tubular column type, the lower chord of the modeling main truss is an arch-shaped main truss, the lower chord is arch-shaped, each secondary truss is a single-piece truss, the main trusses and the secondary trusses are reasonably distributed, and the strength is ensured. The structure is similar to that of a fish belly type truss at ordinary times but the shape is opposite, and the secondary trusses are connected in a cross mode through the upper chord and the lower chord connecting tie rods on the basis of the shared main truss to form a complete integrated concave fish belly type double-slope roof truss structure, wherein the two ends are thick, and the middle is light and thin; the concave fish-belly shape of the whole truss can be controlled according to the size and the length of the triangular trusses at the two ends of the secondary truss and the middle single chord.
Description
Technical Field
The invention relates to the technical field of large-scale roof trusses, in particular to a large-span concave fish belly type double-slope roof truss and an installation method thereof.
Background
With the continuous development of domestic economy, overlines, galleries and large-scale exhibition halls are emerging continuously, and large-span roof trusses with different shapes are layered endlessly; the selection of the structural form and the structural design directly determine the cost, the rigidity and the stability of the building structure, and are also related to the safety and the comfort of pedestrians borne by the building structure. The fish belly type truss in the past has the advantages of single shape, heavy middle part, large steel consumption and low cost when a large-span roof truss is formed.
Disclosure of Invention
In order to solve the technical problems, the invention provides a large-span concave fish-belly type double-slope roof truss and an installation method thereof, the structure of the roof truss is similar to that of the existing fish-belly type truss, but the structure is opposite to that of the existing fish-belly type truss, and the secondary trusses are connected in a cross mode through upper and lower chord connecting rods on the basis of sharing the main truss, so that the main truss and the secondary trusses form a whole body.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
the utility model provides a concave fish belly formula two slope roof trusses of large-span which characterized in that: the truss structure comprises a light truss area, a reinforced truss unit and an overhanging truss unit;
the light truss plate area is arranged in the middle of the roof truss and comprises a plurality of light truss units which are longitudinally arranged in parallel;
the light truss unit is integrally of a concave fish-belly type structure and comprises positioning lattice columns, arched main trusses, modeling main trusses, light modeling secondary trusses and truss connecting rods arranged between the trusses; the number of the positioning lattice columns is four, and the positioning lattice columns are vertically arranged and arranged in a rectangular shape; the two arched main trusses are respectively and longitudinally arranged between the two positioning lattice columns, and two end parts of the two arched main trusses are respectively welded and fixed with the positioning lattice columns; two positioning lattice columns and an arched main truss are shared between adjacent combined light trusses; the two modeling main trusses are respectively and transversely arranged between the two positioning lattice columns, and two end parts of the two modeling main trusses are respectively welded and fixed with the positioning lattice columns; the positioning lattice column, the arched main truss and the modeling main truss are enclosed to form a rectangular framework; the light modeling secondary trusses are transversely and uniformly arranged between the two modeling main trusses, and the end parts of the light modeling secondary trusses are respectively welded and fixed with the arched main trusses; the truss connecting rods of the light truss units comprise upper and lower chord connecting horizontal rods and a main chord longitudinal connecting rod for connecting and reinforcing the light modeling secondary truss;
the reinforced truss units are longitudinally arranged at two sides of the light truss plate area and comprise positioning lattice columns, arched main trusses, modeling main trusses, reinforced modeling secondary trusses and truss connecting rods arranged between the trusses; the positioning lattice column, the arched main truss and the modeling main truss are structurally and structurally identical to the light truss units; the reinforced truss units adjacent to the light truss units share two positioning lattice columns and an arched main truss; the plurality of the reinforced modeling secondary trusses are transversely and uniformly arranged between the two modeling main trusses, and the end parts of the reinforced modeling secondary trusses are respectively welded and fixed with the arched main trusses; the truss connecting rods of the strengthening truss units comprise upper and lower chord connecting horizontal rods and upper and lower chord connecting strengthening inclined rods for connecting and strengthening the strengthening modeling secondary trusses, and main chord longitudinal connecting rods which are arranged at the center of the whole truss and connect all the strengthening modeling secondary trusses into a whole;
the cantilever truss units are arranged on the periphery of the roof truss and comprise cantilever main trusses, cantilever modeling trusses, light modeling secondary trusses and truss connecting rods arranged between the trusses, the cantilever main trusses comprise a plurality of truss connecting rods, the cantilever main trusses are longitudinally arranged at two ends of the reinforced truss units and the light truss units in parallel and are coaxial with the arched main trusses, and the inner side ends of the cantilever truss units are welded and fixed with the positioning lattice columns and the reinforced modeling secondary trusses or the light modeling secondary trusses; the light modeling secondary trusses are arranged between the two overhanging main trusses on the outermost side in a transverse parallel mode, and contact points of the light modeling secondary trusses and the overhanging main trusses are welded and fixed; the cantilever modeling truss is transversely arranged on the outer side of the strengthening truss unit in parallel and is perpendicular to the arched main truss; the truss connecting rod of the cantilever truss unit comprises an end through long sealing rod, a through long conversion reinforcing rod and a cantilever reinforcing inclined rod which are used for reinforcing the cantilever main truss, an extending part of a main chord longitudinal connecting rod which connects all the light modeling secondary trusses into a whole, a main chord longitudinal connecting rod which connects the cantilever modeling trusses into a whole, and a longitudinal end through long sealing rod and a longitudinal through long conversion reinforcing rod which are arranged at the tail end outside the cantilever modeling truss.
The upper chord and lower chord connecting horizontal rods are horizontally arranged between two upper chords or two lower chords of two adjacent reinforced modeling sub-trusses or light modeling sub-trusses, and the upper chord and lower chord connecting and reinforcing inclined rods are arranged between one upper chord and one lower chord of the two adjacent reinforced modeling sub-trusses; the main chord of the light truss unit is longitudinally connected with the tie rod at the center of the whole truss, longitudinally penetrates through the whole truss and connects all the light modeling sub-trusses into a whole; the two ends of the longitudinal tie rod of the main chord of the reinforced truss unit are continuous parts which penetrate through all the light-weight modeling secondary trusses, the middle of the longitudinal tie rod is a discontinuous part and consists of a plurality of split rods, and the split rods are arranged between two adjacent reinforced modeling secondary trusses; the transverse end through length sealing rod and the transverse through length conversion reinforcing rod are arranged at the tail end of the overhanging main truss in parallel and are arranged in a transverse through length mode, and all truss units are connected into a whole; the cantilever reinforcing oblique rod is arranged between the transverse through-length conversion reinforcing rod and the positioning lattice column, and the middle of the cantilever reinforcing oblique rod is fixedly connected with the passing light modeling secondary truss.
The positioning lattice column is formed by combining five steel pipes, is rectangular as a whole and comprises a main column positioned in the middle and corner columns positioned at four corners; horizontal cross rods are respectively arranged between the main upright post and the corner upright post and between adjacent corner upright posts at the top and the bottom of the positioning lattice post; a horizontal studding rod is arranged between the main upright post and the corner upright post at the middle position of the positioning lattice post; and oblique lacing bars are respectively arranged between the middle position of the main upright post and the top and the bottom of the corner upright post for further reinforcement.
The arched main truss is a double-row frame and comprises two upper chord straight rods and two arched lower chord rods which are arranged in parallel, a first straight web member and a first inclined web member are arranged between the upper chord straight rods and the arched lower chord rods on the same side, an upper chord horizontal connecting rod is arranged between the two upper chord straight rods, and a lower chord horizontal connecting rod is arranged between the two arched lower chord rods; the upper chord straight rod and the arched lower chord are formed by splicing a plurality of sections of short rods.
The modeling main truss is a double-row frame and comprises two upper chord combined rods which are arranged in parallel, the middle of each upper chord combined rod is low, the two sides of each upper chord combined rod are high, the two upper chord combined rods are tied and fixed through a horizontal connecting rod, and a horizontal reinforcing rod is arranged in the middle of each upper chord combined rod for reinforcing; the bottom of the upper chord combined rod is provided with four lower chords which respectively form a K-shaped frame with the two upper chord combined rods; a second straight web member and a second inclined web member are arranged between the upper chord combined rod and the lower chord member on the same side; two lower chords arranged in parallel are fixed by a horizontal tie rod in a pulling mode; and an inclined reinforcing rod is further arranged, one end of the inclined reinforcing rod is fixed on the upper chord combined rod, and the other end of the inclined reinforcing rod is fixed in the middle of the horizontal connecting rod between the lower chords.
The cantilever main truss is a double-row frame and comprises two longitudinal cantilever upper chords and two cantilever lower chords which are arranged in parallel, one ends of the two longitudinal cantilever upper chords and one ends of the two longitudinal cantilever lower chords are correspondingly fixed to form a tripod, and a cantilever conversion support is arranged at a fixed position; an overhanging straight web member and an overhanging inclined web member are arranged between the longitudinal overhanging upper chord member and the overhanging lower chord member on the same side, an upper chord connecting rod is arranged between the two longitudinal overhanging upper chord members, and a lower chord connecting rod is arranged between the two overhanging lower chord members; the longitudinal cantilever upper chord extends to one side of the cantilever conversion support to form a cantilever extension chord; the transverse end through long sealing rod is transversely and vertically arranged at the tail end of the overhanging extending chord member, and the transverse through long conversion reinforcing rod is transversely arranged at the overhanging conversion support position.
The cantilever modeling truss is a triangular single-piece truss and comprises a transverse cantilever upper chord member and a cantilever combined lower chord member, and a fifth straight web member and a fifth inclined web member are arranged between the transverse cantilever upper chord member and the cantilever combined lower chord member; the tail end of the transverse cantilever upper chord is provided with a cantilever extension chord, and the longitudinal through length conversion reinforcing rods pass through the cantilever extension chord and are respectively welded and fixed with the cantilever extension chord; the longitudinal end part through long sealing rod is longitudinally arranged at the tail end of the overhanging extension chord member.
The light modeling secondary truss is a K-shaped single-piece truss and comprises an upper chord and a first combined lower chord, wherein the middle of the upper chord is disconnected into two sections for the longitudinal tie rod of the main chord to pass through and be fixedly connected with; and a third straight web member and a third inclined web member are arranged between the upper chord member and the first combined lower chord member.
The reinforced modeling secondary truss is a K-shaped single-piece truss and comprises box-type upper chords and a second combined lower chord, and two ends of a split rod of the main chord longitudinally connected with the tie rod are welded in the middle of two adjacent box-type upper chords; and a fourth straight web member and a fourth inclined web member are arranged between the box-type upper chord and the second combined lower chord.
The mounting method of the large-span concave fish belly type double-slope roof truss is characterized by comprising the following steps:
step one, preparation work: preparing materials and measuring and positioning;
secondly, installing a reinforced truss unit from one end;
s1, mounting and positioning lattice columns;
s2, mounting the modeling main truss and welding the modeling main truss with the positioning lattice column;
s3, installing an arch-shaped main truss and welding the arch-shaped main truss with the positioning lattice column;
s4, installing split rods for reinforcing the middle discontinuous parts of the longitudinal tie rods of the modeling secondary trusses and the main chord members at the same time;
s5, installing the overhanging main truss, installing the transverse end through-length sealing rod and the transverse through-length conversion reinforcing rod at the same time, and welding;
s6, installing the light modeling secondary truss and the continuous parts at the two ends of the main chord longitudinal connecting rod: the main chord longitudinal tie rod is respectively welded with the light modeling secondary truss, the light modeling secondary truss and the overhanging main truss;
s7, installing residual truss connecting rods, including installing upper and lower chord connecting horizontal rods between the light modeling secondary trusses, and installing overhanging reinforcing oblique rods between the overhanging main truss and the positioning lattice column;
step three, installing the cantilever truss unit connected with the reinforced truss unit: installing an overhanging modeling truss, and welding the overhanging modeling truss with the arched main truss after measurement and positioning; installing an upper chord and a lower chord connecting horizontal rod, and welding the upper chord and the lower chord connecting horizontal rods with the cantilever modeling truss; installing a longitudinal end through long sealing rod and a longitudinal through long conversion reinforcing rod, and welding the longitudinal end through long sealing rod and the longitudinal through long conversion reinforcing rod with the cantilever modeling truss;
step four, installing light truss units, wherein the installation method of the positioning lattice column, the modeling main truss and the arched main truss is the same as the installation method of the positioning lattice column, the modeling main truss and the arched main truss from S1 to S3 in the step two, then simultaneously installing the light modeling secondary truss and the main chord longitudinal connecting rod, and respectively welding the main chord longitudinal connecting rod with the light modeling secondary truss, the light modeling secondary truss with the arched main truss or the overhanging main truss; finally, installing the rest truss connecting rods, wherein the steps comprise installing upper and lower chord connecting horizontal rods between the light modeling secondary trusses and installing overhanging reinforcing inclined rods between the overhanging main truss and the positioning lattice column;
and fifthly, carrying out overall quality inspection, and thus finishing the large-span concave fish belly type double-slope roof truss.
The large-span concave fish belly type double-slope roof truss is similar to a normal fish belly type truss structure, but is opposite in modeling; on the basis of sharing the main truss, the secondary trusses are connected in a cross way through the upper chord connecting tie rod and the lower chord connecting tie rod, so that the main truss and the secondary trusses form a complete whole, namely, the concave fish belly type double-slope roof truss structure is thick at two ends and thin in the middle; the main truss is shared among all trusses, and the connecting rods are in cross connection, so that the whole roof truss forms a whole with reasonable stress and attractive appearance; meanwhile, the concave fish belly shape of the whole truss is controlled according to the sizes and the lengths of the triangular trusses at the two ends of the secondary truss and the middle single chord; specifically, compared with the prior art, the truss structure ensures the shape and the stress state of the truss through the following four main technologies:
1) the positioning lattice column is a pipe column type, and the middle main upright post is connected with the four-corner secondary upright posts and the secondary upright posts through a round pipe horizontal rod and a studding rod to form a lattice type upright post, so that the rigidity of the truss is ensured;
2) the lower chord of the modeling main truss is an arch-shaped main truss, and the lower chord is arch-shaped, so that the stress capacity of the main truss is enhanced;
3) each secondary truss is a single-piece truss, a single chord is connected with single-piece near-triangular trusses at two ends, and the shape of the whole truss is controlled according to the size of the triangular trusses at two ends of the secondary truss and the size of the middle single chord;
4) the primary and secondary trusses are reasonably distributed to form the whole truss, and the strength is guaranteed.
Drawings
The above and/or other aspects and advantages of the present invention will become more apparent and more readily appreciated from the detailed description taken in conjunction with the following drawings, which are meant to be illustrative, not limiting of the invention, and in which:
FIG. 1 is a schematic view of the overall structure of a large-span sunken fish belly type double-slope roof truss related to the invention;
fig. 2 is a schematic view showing the overall construction of a lightweight truss unit according to the present invention;
fig. 3 is a schematic view showing the overall structure of a reinforcing truss unit according to the present invention;
FIG. 4 is a schematic structural view of an arched primary truss according to the present invention;
FIG. 5 is a schematic structural view of a positioning lattice column according to the present invention;
FIG. 6 is a schematic structural view of a main truss for modeling according to the present invention;
fig. 7 is a schematic structural view of an overhanging main truss according to the present invention;
FIG. 8 is a schematic structural view of a reinforced form sub-truss according to the present invention;
FIG. 9 is a schematic view of the construction of a lightweight form sub-truss according to the present invention;
fig. 10 is a schematic structural view of an overhanging truss unit provided outside a reinforcing truss unit according to the present invention;
fig. 11 is a schematic structural view of the cantilever truss according to the present invention.
Reference numerals: a-reinforced truss unit, B-light truss unit, C-cantilever truss unit, 1-truss connecting rod, 11-upper and lower chord connecting horizontal rod, 12-main chord longitudinal connecting rod, 13-transverse end through long sealing rod, 14-transverse through long conversion reinforcing rod, 15-cantilever reinforcing diagonal rod, 16-upper and lower chord connecting reinforcing diagonal rod, 17-longitudinal end through long sealing rod, 18-longitudinal through long conversion reinforcing rod, main chord longitudinal connecting rod 2-light modeling secondary truss, 21-upper chord rod, 22-first combined lower chord, 23-third straight web member, 24-third diagonal web member, 3-positioning lattice column, 31-main column, 32-angle column, 33-horizontal cross rod, 34-horizontal patch rod, 35-diagonal web member, 4-arched main truss, 41-arched lower chord, 42-upper chord straight rod, 43-first straight web member, 44-upper chord horizontal connecting rod, 45-lower chord horizontal connecting rod, 46-first diagonal web member, 5-modeling main truss, 51-upper chord combined rod, 52-lower chord member, 53-horizontal reinforcing rod, 54-horizontal connecting rod, 55-second straight web member, 56-diagonal reinforcing rod, 57-second diagonal web member, 6-overhanging main truss, 61-longitudinal overhanging upper chord member, 62-overhanging lower chord member, 63-lower chord connecting rod, 64-upper chord connecting rod, 65-overhanging straight web member, 66-overhanging diagonal web member, 67-overhanging conversion support, 68-overhanging extension chord member, 7-strengthening modeling secondary truss, 71-box-type upper chord, 72-second combined lower chord, 73-fourth straight web member, 74-fourth inclined web member, 8-cantilever modeling truss, 81-transverse cantilever upper chord member, 82-cantilever combined lower chord member, 83-cantilever extension chord member, 84-fifth straight web member and 85-fifth inclined web member.
Detailed Description
Hereinafter, an embodiment of a large-span depressed fish-belly type double-slope roof truss and a method of installing the same of the present invention will be described with reference to the accompanying drawings.
The examples described herein are specific embodiments of the present invention, are intended to be illustrative and exemplary in nature, and are not to be construed as limiting the scope of the invention. In addition to the embodiments described herein, those skilled in the art will be able to employ other technical solutions which are obvious based on the disclosure of the claims and the specification of the present application, and these technical solutions include technical solutions which make any obvious replacement or modification for the embodiments described herein. The drawings in the present specification are schematic views to assist in explaining the concept of the present invention, and schematically show the shapes of respective portions and their mutual relationships. It is noted that the drawings are not necessarily to the same scale so as to clearly illustrate the structures of the various elements of the embodiments of the invention. Like reference numerals are used to denote like parts.
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention. Like fig. 1, concave fish belly formula two slope roof trusses of large-span, its characterized in that: the truss structure comprises a light truss area, a strengthening truss unit A and an overhanging truss unit C;
the light truss section is arranged in the middle of the roof truss and comprises a plurality of light truss units B which are longitudinally arranged in parallel, the number of the light truss units B is generally 2-8, as shown in figure 2, the light truss units B are integrally of a concave fish-belly type structure and comprise positioning lattice columns 3, arched main trusses 4, modeling main trusses 5, light modeling secondary trusses 2 and truss connecting rods 1 arranged between the trusses; the number of the positioning lattice columns 3 is four, and the positioning lattice columns are vertically arranged and arranged in a rectangular shape; the two arched main trusses 4 are respectively and longitudinally arranged between the two positioning lattice columns 3, and two end parts of the two arched main trusses are respectively welded and fixed with the positioning lattice columns 3; two positioning lattice columns 3 and an arched main truss 4 are shared between adjacent light truss units B; the two modeling main trusses 5 are respectively and transversely arranged between the two positioning lattice columns 3, and two end parts of the two modeling main trusses are respectively welded and fixed with the positioning lattice columns 3; the positioning lattice column 3, the arched main truss 4 and the modeling main truss 5 are enclosed to form a rectangular framework; the light modeling secondary trusses 2 are transversely and uniformly arranged between the two modeling main trusses 5, and the end parts of the light modeling secondary trusses are respectively welded and fixed with the arched main trusses 4; the truss connecting rod 1 of the light truss unit B comprises an upper chord and lower chord connecting horizontal rod 11 and a main chord longitudinal connecting rod 12, wherein the upper chord and lower chord connecting horizontal rod is used for connecting and reinforcing the light modeling secondary truss 2;
as shown in fig. 3, the reinforced truss units a are longitudinally arranged at two sides of the light truss unit B, and comprise positioning lattice columns 3, arched main trusses 4, modeling main trusses 5, reinforced modeling secondary trusses 7 and truss connecting rods 1 arranged between the trusses; the positioning lattice column 3, the arched main truss 4 and the modeling main truss 5 are all the same in structure and arrangement as the light truss unit B; the reinforced truss units A adjacent to the light truss units B share two positioning lattice columns 3 and an arched main truss 4; a plurality of reinforcing modeling secondary trusses 7 are transversely and uniformly arranged between the two modeling main trusses 5, and the end parts of the reinforcing modeling secondary trusses are respectively welded and fixed with the arched main trusses 4; the truss connecting rod 1 of the strengthening truss unit A comprises an upper chord connecting horizontal rod 11, a lower chord connecting and strengthening inclined rod 16 and a main chord longitudinal connecting rod 12, wherein the upper chord connecting horizontal rod and the lower chord connecting and strengthening inclined rod are used for connecting and strengthening the strengthening modeling sub-truss 7, and the main chord longitudinal connecting rod 12 is arranged in the center of the whole truss and is used for connecting all the strengthening modeling sub-trusses 7 into a whole;
the overhanging truss units C are arranged on the periphery of the roof truss and comprise overhanging main trusses 6, overhanging modeling trusses 8, light modeling secondary trusses 2 and truss connecting rods 1 arranged between the trusses, the overhanging main trusses 6 comprise a plurality of truss units, the truss units are longitudinally arranged at two ends of the reinforced truss units A and the light truss units B in parallel and are coaxial with the arched main trusses 4, and the inner side end parts of the overhanging truss units C are welded and fixed with the positioning lattice columns 3, the reinforced modeling secondary trusses 7 or the light modeling secondary trusses 2; the light modeling secondary trusses 2 are arranged between the two overhanging main trusses 6 on the outermost side in a transverse parallel mode, and contact points of the light modeling secondary trusses and the overhanging main trusses 6 are welded and fixed; the overhanging modeling truss 8 is transversely arranged on the outer side of the strengthening truss unit A in parallel and is perpendicular to the arched main truss 4; the truss link 1 of the cantilever truss unit C includes an end full-length seal bar 13, a full-length conversion reinforcement bar 14, and a cantilever reinforcement diagonal bar 15 for reinforcing the cantilever main truss 6, an extension of a main chord longitudinal tie bar 12 for integrally connecting all the light-weight modeling sub-trusses 2, a main chord longitudinal tie bar 12 for integrally connecting the cantilever modeling truss 8, and a longitudinal end full-length seal bar 17 and a longitudinal full-length conversion reinforcement bar 18 provided at the outer end of the cantilever modeling truss 8.
Wherein, the upper and lower chord connecting horizontal rods 11 are horizontally arranged between two upper chords or two lower chords of two adjacent reinforced modeling sub-trusses 7 or light modeling sub-trusses 2, and the upper and lower chord connecting and reinforcing inclined rods 16 are arranged between one upper chord and one lower chord of two adjacent reinforced modeling sub-trusses 7; the main chord longitudinal tie rod 12 of the light truss unit B is arranged in the center of the whole truss and longitudinally penetrates through the whole truss to connect all the light modeling sub-trusses 2 into a whole; the two ends of a main chord longitudinal connecting rod 12 of the reinforced truss unit A are continuous parts penetrating all the light modeling sub-trusses 2, the middle part is a discontinuous part and consists of a plurality of split rods, and the split rods are arranged between two adjacent reinforced modeling sub-trusses 7; the transverse end through length sealing rod 13 and the transverse through length conversion reinforcing rod 14 are arranged at the tail end of the overhanging main truss 6 in parallel and are arranged in a transverse through length mode, and all truss units are connected into a whole; the overhanging reinforced diagonal rod 15 is arranged between the transverse through-length conversion reinforced rod 14 and the positioning lattice column 3, and the middle of the overhanging reinforced diagonal rod is fixedly connected with the passing light modeling secondary truss 2.
As shown in fig. 4, the arched main truss 4 is a double-row truss, and includes two upper chord straight rods 42 and two arched lower chord rods 41 which are arranged in parallel, a first straight web member 43 and a first diagonal web member 46 are arranged between the upper chord straight rods 42 and the arched lower chord rods 41 on the same side, an upper chord horizontal connecting rod 44 is arranged between the two upper chord straight rods 42, and a lower chord horizontal connecting rod 45 is arranged between the two arched lower chord rods 41; the upper chord straight rod 42 and the arched lower chord 41 are formed by splicing a plurality of short rods.
As shown in fig. 5, the positioning lattice column 3 is formed by combining five steel pipes, is rectangular as a whole, and comprises a main upright column 31 positioned in the middle and corner upright columns 32 positioned at four corners; horizontal cross bars 33 are respectively arranged between the main upright column 31 and the corner upright columns 32 and between the adjacent corner upright columns 32 at the top and the bottom of the positioning lattice column 3; a horizontal studding rod 34 is arranged between the main upright column 31 and the corner upright column 32 at the middle position of the positioning lattice column 3; oblique lacing bars 35 are respectively arranged between the middle position of the main upright column 31 and the top and the bottom of the corner upright column 32 for further reinforcement.
As shown in fig. 6, the modeling main truss 5 is a double-row frame, and comprises two upper chord combined rods 51 which are arranged in parallel, the middle of each upper chord combined rod 51 is low, the two sides of each upper chord combined rod 51 are high, the two upper chord combined rods 51 are tied and fixed through a horizontal tie rod 54, and a horizontal reinforcing rod 53 is arranged in the middle for reinforcing; the bottom of the upper chord combined rod 51 is provided with four lower chords 52 which respectively form a K-shaped frame with the two upper chord combined rods 51; a second straight web member 55 and a second inclined web member 57 are arranged between the upper chord combined rod 51 and the lower chord 52 on the same side; two lower chords 52 arranged in parallel are fixed by a horizontal connecting tie rod 54; an oblique reinforcing rod 56 is also provided, one end of which is fixed to the upper chord 51 and the other end of which is fixed to the middle of the horizontal tie rod 54 between the lower chords 52.
As shown in fig. 7, the overhanging main truss 6 is a double-row frame, and includes two longitudinally overhanging upper chords 61 and two overhanging lower chords 62 arranged in parallel, one end of each of the two longitudinally overhanging upper chords is correspondingly fixed to form a tripod, and an overhanging conversion support 67 is arranged at a fixed position; an overhanging straight web member 65 and an overhanging inclined web member 66 are arranged between the longitudinal overhanging upper chord members 61 and the overhanging lower chord members 62 on the same side, an upper chord connecting tie rod 64 is arranged between the two longitudinal overhanging upper chord members 61, and a lower chord connecting tie rod 63 is arranged between the two overhanging lower chord members 62; the longitudinally overhanging upper chord 61 extends towards one side of the overhanging conversion bracket 67 to form an overhanging extension chord 68; the transverse end full-length seal rod 13 is transversely and vertically arranged at the tail end of the overhanging extending chord 68, and the transverse full-length conversion reinforcing rod 14 is transversely arranged at the position of the overhanging conversion support lug 67.
As shown in fig. 8, the reinforced modeling sub-truss 7 is a K-shaped single-piece truss and comprises a box-shaped upper chord 71 and a second combined lower chord 72, wherein two ends of a split rod of the main chord longitudinal connecting rod 12 are welded at the middle position of two adjacent box-shaped upper chords 71; a fourth straight web member 73 and a fourth diagonal web member 74 are provided between the box-shaped upper chord 71 and the second combined lower chord 72.
As shown in fig. 9, the light-modeling secondary truss 2 is a K-shaped single-piece truss and comprises an upper chord 21 and a first combined lower chord 22, wherein the middle of the upper chord 21 is broken into two sections for the main chord longitudinal connecting rod 12 to pass through and be fixedly connected with; a third straight web member 23 and a third diagonal web member 24 are arranged between the upper chord 21 and the first combined lower chord 22.
As shown in fig. 10 and 11, the overhanging model truss 8 is a triangular single-piece truss, and includes a transverse overhanging upper chord 81 and an overhanging combined lower chord 82, and a fifth straight web member 84 and a fifth diagonal web member 85 are arranged between the two; the tail end of the transverse overhanging upper chord 81 is provided with an overhanging extension chord 83, and the longitudinal through length conversion reinforcing rod 18 passes through the overhanging extension chord 83 and is respectively welded and fixed with the overhanging extension chord; the longitudinal end portion through seal rod 17 is longitudinally provided at the tail end of the overhanging extension chord 83.
The mounting method of the large-span concave fish belly type double-slope roof truss is characterized by comprising the following steps:
step one, preparation work: preparing materials and measuring and positioning;
secondly, installing a reinforced truss unit A from one end;
s1, mounting and positioning lattice column 3:
1, positioning a main upright post 31 on a tire;
2, sequentially assembling a horizontal studding rod 34 and an inclined studding rod 35 from bottom to top and welding the horizontal studding rod and the inclined studding rod with the main upright column 31;
3, sequentially and symmetrically installing the angle upright posts 32 and sequentially and symmetrically welding the angle upright posts with the horizontal embellishing rods 34 and the inclined embellishing rods 35;
4, mounting a horizontal cross bar 33 and welding the horizontal cross bar with the corner upright posts 32;
s2, installing the modeling main truss 5, and welding the modeling main truss with the positioning lattice column 3:
1, assembling an upper tire and positioning an upper chord combined rod 51;
2, sequentially assembling and welding a second straight web member 55 and a lower chord 52;
3, assembling and welding the second diagonal web members 57, and simultaneously welding the upper chord combined rod 51 and the lower chord 52;
4, sequentially assembling and welding a horizontal reinforcing rod 53 and a horizontal connecting rod 54;
5 assembling and welding the oblique reinforcing rods 56;
s3, installing the arched main truss 4 and welding the arched main truss with the positioning lattice column 3:
1, positioning an upper tire of an arch-shaped lower chord 41;
2, sequentially positioning the first straight web members 43;
3, positioning the upper chord 42 by an upper mold, and sequentially welding the interfaces of the first straight web member 43, the arched lower chord 41 and the upper chord 42 from the middle to the two ends;
4, assembling a first diagonal web member 46 and welding the first diagonal web member with the arched lower chord 41 and the arched upper chord 42;
5, assembling and welding an upper chord connecting tie rod 44 and a lower chord connecting tie rod 45;
s4, installing the split rods for reinforcing the middle discontinuous parts of the moulding secondary truss 7 and the main chord longitudinal connecting rod 12 at the same time:
1, firstly, positioning a box-type upper chord 71 by an upper mold, and respectively welding and fixing two ends of the upper chord with an arched main truss 4;
2, a fourth straight web member 73 is assembled and fixed by an upper tire, a second combined lower chord member 72 is assembled by an upper tire, and the box-type upper chord member 71, the second combined lower chord member 22 and the fourth straight web member 23 are respectively welded;
3 finally, assembling and welding the fourth diagonal web members 74, wherein two ends of each split member are respectively welded in the middle of two adjacent box-type upper chords 71;
s5, mounting the overhanging main truss 6:
1, assembling an upper tire and positioning an upper chord 61 which is longitudinally cantilevered;
2, assembling and welding the cantilever inclined web member 65 and the cantilever lower chord member 62;
3 assembling and welding the cantilever inclined web members 66, and simultaneously welding the longitudinal cantilever upper chord 61 and the cantilever lower chord 62;
4, sequentially assembling and welding a lower chord connecting tie rod 63 and an upper chord connecting tie rod 64;
5 assembling an overhanging conversion support bracket 67 and an overhanging extension chord 68, and simultaneously installing a transverse end through length sealing rod 13 and a transverse through length conversion reinforcing rod 14, and welding;
s6, installing the light modeling secondary truss 2 and the main chord to longitudinally connect the continuous parts at the two ends of the tie rod 12:
1, respectively welding a main chord longitudinal connecting tie rod 12 with a light modeling secondary truss 2, and welding the light modeling secondary truss 2 with an overhanging main truss 6;
2, firstly, positioning the upper tire of the upper chord 21 and welding and fixing the upper tire with the longitudinal tie rod 12 of the main chord;
3, assembling and fixing the upper tire of the third straight web member 23;
4, assembling the upper tire of the first combined lower chord 22, wherein the upper chord 21, the first combined lower chord 22 and the third straight web member 23 are respectively welded;
5, assembling and welding a third diagonal web member 24;
s7, installing the rest truss connecting rods 1: the method comprises the steps that an upper chord and a lower chord connecting horizontal rod 11 are arranged between light modeling secondary trusses 2, and an overhanging reinforcing inclined rod 15 is arranged between an overhanging main truss 6 and a positioning lattice column 3;
step three, installing an overhanging truss unit C connected with the reinforced truss unit A:
s1, mounting the overhanging modeling truss 8:
1, transversely overhanging an upper chord 81, mounting a tire, and positioning;
2, assembling and fixing the upper tire of the fifth straight web member 84;
3, assembling upper tires of the overhanging combined lower chord 82;
4, welding the transverse cantilever upper chord 81, the cantilever combined lower chord 82 and the fifth straight web member 84 respectively; the fifth diagonal web members 85 are assembled and welded;
s2, welding the overhanging modeling truss 8 and the arched main truss 4 after measurement and positioning;
s3, installing the upper and lower chord connecting horizontal rods 11 and welding the upper and lower chord connecting horizontal rods with the overhanging modeling truss 8;
s4, installing a longitudinal end through long sealing rod 17 and a longitudinal through long conversion reinforcing rod 18, and welding the longitudinal end through long conversion reinforcing rod with the cantilever modeling truss 8; when the overhanging extension chord 83 is installed, the overhanging extension chord is installed and welded with the longitudinal end through length sealing rod 17 and the longitudinal through length conversion reinforcing rod 18 at the same time;
step four, installing the light truss units B, wherein the installation method of the positioning lattice column 3, the modeling main truss 5 and the arched main truss 4 is the same as that of the steps S1-S3 in the step two;
then, the light modeling secondary truss 2 and the main chord longitudinal connecting rod 12 are simultaneously installed, and the main chord longitudinal connecting rod 12 is respectively welded with the light modeling secondary truss 2, the light modeling secondary truss 2 and the arched main truss 4 or the overhanging main truss 6;
1, firstly, positioning an upper tire of an upper chord 21 and welding and fixing the upper tire with a longitudinal tie rod 12 of a main chord;
2, assembling and fixing the upper tire of a third straight web member 23;
3, assembling the upper tire of the combined lower chord 22, wherein the upper chord 21, the combined lower chord 22 and the third straight web member 23 are respectively welded;
4, assembling and welding the third diagonal web members 24;
5, installing residual truss connecting rods 1, including installing upper and lower chord connecting horizontal rods 11 between the light modeling secondary trusses 2 and installing overhanging reinforcing inclined rods 15 between the overhanging main truss 6 and the positioning lattice column 3;
and fifthly, carrying out overall quality inspection, thus obtaining the large-span concave fish belly type double-slope roof truss.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a concave fish belly formula two slope roof trusses of large-span which characterized in that: the truss structure comprises a light truss area, a reinforced truss unit (A) and an overhanging truss unit (C);
the light truss plate area is arranged in the middle of the roof truss and comprises a plurality of light truss units (B) which are longitudinally arranged in parallel;
the light truss unit (B) is of a concave fish belly type structure integrally and comprises positioning lattice columns (3), arched main trusses (4), modeling main trusses (5), light modeling secondary trusses (2) and truss connecting rods (1) arranged between the trusses; the number of the positioning lattice columns (3) is four, and the positioning lattice columns are vertically arranged and arranged in a rectangular shape; the two arched main trusses (4) are respectively and longitudinally arranged between the two positioning lattice columns (3), and two end parts of the two arched main trusses are respectively welded and fixed with the positioning lattice columns (3); two positioning lattice columns (3) and an arched main truss (4) are shared between adjacent light truss units (B); the two modeling main trusses (5) are respectively and transversely arranged between the two positioning lattice columns (3), and two end parts of the two modeling main trusses are respectively welded and fixed with the positioning lattice columns (3); the positioning lattice column (3), the arched main truss (4) and the modeling main truss (5) are enclosed to form a rectangular framework; the light modeling secondary trusses (2) are transversely and uniformly arranged between the two modeling main trusses (5), and the end parts of the light modeling secondary trusses are respectively welded and fixed with the arched main trusses (4); the truss connecting rod (1) of the light truss unit (B) comprises an upper chord and lower chord connecting horizontal rod (11) and a main chord longitudinal connecting rod (12), wherein the upper chord and lower chord connecting horizontal rod is used for connecting and reinforcing the light modeling secondary truss (2);
the reinforced truss units (A) are longitudinally arranged at two sides of the light truss unit (B) and comprise positioning lattice columns (3), arched main trusses (4), modeling main trusses (5), reinforced modeling secondary trusses (7) and truss connecting rods (1) arranged between the trusses; the positioning lattice column (3), the arched main truss (4) and the modeling main truss (5) are structurally and structurally identical to the light truss unit (B); the reinforced truss units (A) adjacent to the light truss units (B) share two positioning lattice columns (3) and an arched main truss (4); the plurality of the reinforcing modeling secondary trusses (7) are transversely and uniformly arranged between the two modeling main trusses (5), and the end parts of the reinforcing modeling secondary trusses are respectively welded and fixed with the arched main trusses (4); the truss connecting rod (1) of the strengthening truss unit (A) comprises an upper chord connecting horizontal rod (11) and a lower chord connecting strengthening horizontal rod (16) which are used for connecting and strengthening the strengthening and modeling secondary trusses (7), and a main chord longitudinal connecting rod (12) which is arranged in the center of the whole truss and is used for connecting all the strengthening and modeling secondary trusses (7) into a whole;
the cantilever truss units (C) are arranged on the periphery of the roof truss and comprise cantilever main trusses (6), cantilever modeling trusses (8), light modeling secondary trusses (2) and truss connecting rods (1) arranged between the trusses, the cantilever main trusses (6) comprise a plurality of truss connecting rods, the cantilever main trusses are longitudinally arranged at two ends of the reinforced truss units (A) and the light truss units (B) in parallel and are coaxially arranged with the arched main trusses (4), and the inner side end parts of the cantilever main trusses are welded and fixed with the positioning lattice columns (3), the reinforcing modeling secondary trusses (7) or the light modeling secondary trusses (2); a plurality of light modeling secondary trusses (2) are transversely arranged between the two overhanging main trusses (6) on the outermost side in parallel, and contact points with the overhanging main trusses (6) are welded and fixed; the overhanging modeling truss (8) is transversely arranged on the outer side of the strengthening truss unit (A) in parallel and is perpendicular to the arched main truss (4); the truss connecting rod (1) of the cantilever truss unit (C) comprises a transverse end through long sealing rod (13) for reinforcing a cantilever main truss (6), a transverse through long conversion reinforcing rod (14) and a cantilever reinforcing oblique rod (15), an extending part of a main chord longitudinal connecting rod (12) for connecting all light modeling secondary trusses (2) into a whole, a main chord longitudinal connecting rod (12) for connecting the cantilever modeling truss (8) into a whole, and a longitudinal end through long sealing rod (17) and a longitudinal through long conversion reinforcing rod (18) which are arranged at the outer tail end of the cantilever modeling truss (8).
2. The large-span recessed fish belly type double-slope roof truss of claim 1, wherein: the upper and lower chord connecting horizontal rods (11) are horizontally arranged between two upper chords or two lower chords of two adjacent reinforced modeling sub-trusses (7) or light modeling sub-trusses (2), and the upper and lower chord connecting reinforced inclined rods (16) are arranged between one upper chord and one lower chord of the two adjacent reinforced modeling sub-trusses (7); the main chord longitudinal connecting rod (12) of the light truss unit (B) is arranged in the center of the whole truss and longitudinally penetrates through the whole truss to connect all the light modeling secondary trusses (2) into a whole; the two ends of a main chord longitudinal connecting rod (12) of the reinforced truss unit (A) are continuous parts penetrating all the light modeling secondary trusses (2), the middle part is a discontinuous part and consists of a plurality of split rods, and the split rods are arranged between two adjacent reinforced modeling secondary trusses (7); the transverse end through length sealing rod (13) and the transverse through length conversion reinforcing rod (14) are arranged at the tail end of the cantilever main truss (6) in parallel and are arranged in a transverse through length mode, and all truss units are connected into a whole; the cantilever reinforcing diagonal rod (15) is arranged between the transverse full-length conversion reinforcing rod (14) and the positioning lattice column (3), and the middle of the cantilever reinforcing diagonal rod is fixedly connected with the passing light modeling secondary truss (2).
3. The large-span recessed fish belly type double-slope roof truss of claim 1, wherein: the positioning lattice column (3) is formed by combining five steel pipes, is rectangular as a whole and comprises a main upright column (31) positioned in the middle and corner upright columns (32) positioned at four corners; horizontal cross rods (33) are respectively arranged between the main upright column (31) and the corner upright columns (32) and between the adjacent corner upright columns (32) at the top and the bottom of the positioning lattice column (3); a horizontal studding rod (34) is arranged between the main upright post (31) and the corner upright post (32) at the middle position of the positioning lattice column (3); oblique lacing bars (35) are further arranged between the middle position of the main upright post (31) and the top and the bottom of the corner upright post (32) for further reinforcement.
4. The large-span recessed fish belly type double-slope roof truss of claim 1, wherein: the arched main truss (4) is a double-row frame and comprises two upper chord straight rods (42) and two arched lower chord rods (41) which are arranged in parallel, a first straight web member (43) and a first inclined web member (46) are arranged between the upper chord straight rods (42) and the arched lower chord rods (41) on the same side, an upper chord horizontal connecting rod (44) is arranged between the two upper chord straight rods (42), and a lower chord horizontal connecting rod (45) is arranged between the two arched lower chord rods (41); the upper chord straight rod (42) and the arched lower chord (41) are formed by splicing a plurality of sections of short rods.
5. The large-span recessed fish belly type double-slope roof truss of claim 1, wherein: the modeling main truss (5) is a double-row frame and comprises two upper chord combined rods (51) which are arranged in parallel, the middle of each upper chord combined rod (51) is low, the two sides of each upper chord combined rod are high, the two upper chord combined rods (51) are tied and fixed through a horizontal connecting rod (54), and a horizontal reinforcing rod (53) is arranged in the middle of each upper chord combined rod for reinforcing; the bottom of the upper chord combined rod (51) is provided with four lower chord rods (52) which respectively form a K-shaped frame with the two upper chord combined rods (51); a second straight web member (55) and a second inclined web member (57) are arranged between the upper chord combined rod (51) and the lower chord member (52) on the same side; two lower chords (52) which are arranged in parallel are fixed by pulling through a horizontal connecting rod (54); an oblique reinforcing rod (56) is also arranged, one end of the oblique reinforcing rod is fixed on the upper chord combined rod (51), and the other end of the oblique reinforcing rod is fixed at the middle position of the horizontal connecting rod (54) between the lower chords (52).
6. The large-span recessed fish belly type double-slope roof truss of claim 1, wherein: the cantilever main truss (6) is a double-row frame and comprises two longitudinal cantilever upper chords (61) and two cantilever lower chords (62) which are arranged in parallel, one ends of the two longitudinal cantilever upper chords and one ends of the two longitudinal cantilever lower chords are correspondingly fixed to form a tripod, and a cantilever conversion support (67) is arranged at a fixed position; an overhanging straight web member (65) and an overhanging inclined web member (66) are arranged between the longitudinal overhanging upper chord member (61) and the overhanging lower chord member (62) on the same side, an upper chord connecting rod (64) is arranged between the two longitudinal overhanging upper chord members (61), and a lower chord connecting rod (63) is arranged between the two overhanging lower chord members (62); the longitudinal cantilever upper chord (61) extends to one side of the cantilever conversion support (67) to form a cantilever extension chord (68); the transverse end full-length sealing rod (13) is transversely and vertically arranged at the tail end of the overhanging extending chord (68), and the transverse full-length conversion reinforcing rod (14) is transversely arranged at the position of the overhanging conversion support (67).
7. The large-span recessed fish belly type double-slope roof truss of claim 1, wherein: the cantilever modeling truss (8) is a triangular single-piece truss and comprises a transverse cantilever upper chord member (81) and a cantilever combined lower chord member (82), and a fifth straight web member (84) and a fifth inclined web member (85) are arranged between the transverse cantilever upper chord member and the cantilever combined lower chord member; the tail end of the transverse cantilever upper chord (81) is provided with a cantilever extension chord (83), and the longitudinal through length conversion reinforcing rod (18) passes through the cantilever extension chord and the longitudinal through length conversion reinforcing rod and is respectively welded and fixed with the cantilever extension chord; the longitudinal end part through long sealing rod (17) is longitudinally arranged at the tail end of the overhanging extension chord (83).
8. The large-span recessed fish belly type double-slope roof truss of claim 1, wherein: the light modeling secondary truss (2) is a K-shaped single-piece truss and comprises an upper chord (21) and a first combined lower chord (22), wherein the middle of the upper chord (21) is broken into two sections for the longitudinal tie rod (12) of the main chord to pass through and be fixedly connected with; and a third straight web member (23) and a third inclined web member (24) are arranged between the upper chord (21) and the first combined lower chord (22).
9. The large-span recessed fish belly type double-slope roof truss of claim 1, wherein: the strengthening and modeling secondary truss (7) is a K-shaped single-piece truss and comprises box-shaped upper chords (71) and a second combined lower chord (72), and two ends of a split rod of the main chord longitudinal connecting rod (12) are welded in the middle of two adjacent box-shaped upper chords (71); a fourth straight web member (73) and a fourth inclined web member (74) are arranged between the box-shaped upper chord (71) and the second combined lower chord (72).
10. A method for installing a large-span recessed fish belly type double-slope roof truss as claimed in claim 2, comprising the steps of:
step one, preparation work: preparing materials and measuring and positioning;
step two, installing a reinforced truss unit (A) from one end;
s1, mounting and positioning the lattice column (3);
s2, installing the modeling main truss (5), and welding the modeling main truss with the positioning lattice column (3);
s3, installing the arched main truss (4) and welding the arched main truss with the positioning lattice column (3);
s4, installing a split rod for reinforcing the middle discontinuous part of the moulding secondary truss (7) and the main chord longitudinal connecting tie rod (12) at the same time;
s5, installing the overhanging main truss (6), installing the transverse end through-length sealing rod (13) and the transverse through-length conversion reinforcing rod (14) at the same time, and welding;
s6, installing the lightweight modeling secondary truss (2) and the main chord, and longitudinally connecting the continuous parts at the two ends of the tie rod (12): the main chord longitudinal tie rod (12) is respectively welded with the light modeling secondary truss (2), the light modeling secondary truss (2) and the overhanging main truss (6);
s7, installing residual truss connecting rods (1), wherein the method comprises the steps of installing upper and lower chord connecting horizontal rods (11) between the light modeling secondary trusses (2), and installing overhanging reinforcing inclined rods (15) between an overhanging main truss (6) and a positioning lattice column (3);
step three, installing an overhanging truss unit (C) connected with the reinforced truss unit (A): installing an overhanging modeling truss (8), and welding the overhanging modeling truss with the arched main truss (4) after measurement and positioning; an upper chord and a lower chord connecting horizontal rod (11) are installed and are welded with the overhanging modeling truss (8); installing a longitudinal end through long sealing rod (17) and a longitudinal through long conversion reinforcing rod (18), and welding the longitudinal end through long conversion reinforcing rod with the cantilever modeling truss (8);
step four, installing a light truss unit (B), wherein the installation method of the positioning lattice column (3), the modeling main truss (5) and the arch-shaped main truss (4) is the same as the installation method of the positioning lattice column (3), the modeling main truss (5) and the arch-shaped main truss (4) from S1 to S3 in the step two, then installing the light modeling secondary truss (2) and a main chord longitudinal connecting rod (12) at the same time, and respectively welding the main chord longitudinal connecting rod (12) with the light modeling secondary truss (2), the light modeling secondary truss (2) with the arch-shaped main truss (4) or the overhanging main truss (6); finally, installing the rest truss connecting rods (1), wherein the steps comprise installing upper and lower chord connecting horizontal rods (11) between the light modeling secondary trusses (2), and installing overhanging reinforcing inclined rods (15) between the overhanging main truss (6) and the positioning lattice column (3);
and fifthly, carrying out overall quality inspection, and thus finishing the large-span concave fish belly type double-slope roof truss.
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| CN201811368376.2A CN109281435B (en) | 2018-11-16 | 2018-11-16 | Large-span concave fish belly type double-slope roof truss and installation method thereof |
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| CN201811368376.2A CN109281435B (en) | 2018-11-16 | 2018-11-16 | Large-span concave fish belly type double-slope roof truss and installation method thereof |
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| CN112962851A (en) * | 2021-03-05 | 2021-06-15 | 中建一局集团建设发展有限公司 | Unsupported overhanging three-wing type opening and closing roof |
| CN113338533B (en) * | 2021-06-30 | 2022-05-20 | 杭州井格建筑科技有限公司 | Deformation control method for plate type bidirectional bearing keel frame |
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| JPH04368546A (en) * | 1991-06-18 | 1992-12-21 | Tobishima Corp | Manufacture of truss and construction of dome by trus |
| JP2006144482A (en) * | 2004-11-24 | 2006-06-08 | Shimizu Corp | Frame structure of structure |
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| CN204530991U (en) * | 2015-04-20 | 2015-08-05 | 中国航空规划建设发展有限公司 | A kind of large-span prestressed arch truss and rope film combining structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04368546A (en) * | 1991-06-18 | 1992-12-21 | Tobishima Corp | Manufacture of truss and construction of dome by trus |
| JP2006144482A (en) * | 2004-11-24 | 2006-06-08 | Shimizu Corp | Frame structure of structure |
| CN201443161U (en) * | 2009-06-04 | 2010-04-28 | 鞍钢集团设计研究院 | High-span roofing space pipe truss structure for heavy industry |
| CN201411821Y (en) * | 2009-06-23 | 2010-02-24 | 湖南大学 | Ultra-large latticed structure of cylindrical surface cross tridimensional truss with a flat net support structure |
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