CN112482577B - Large-span space chord supporting wheel spoke type truss structure system and construction method - Google Patents
Large-span space chord supporting wheel spoke type truss structure system and construction method Download PDFInfo
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- CN112482577B CN112482577B CN202011294398.6A CN202011294398A CN112482577B CN 112482577 B CN112482577 B CN 112482577B CN 202011294398 A CN202011294398 A CN 202011294398A CN 112482577 B CN112482577 B CN 112482577B
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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
- E04B1/342—Structures covering a large free area, whether open-sided or not, e.g. hangars, halls
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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
- E04B1/34—Extraordinary structures, e.g. with suspended or cantilever parts supported by masts or tower-like structures enclosing elevators or stairs; Features relating to the elastic stability
- E04B1/3404—Extraordinary structures, e.g. with suspended or cantilever parts supported by masts or tower-like structures enclosing elevators or stairs; Features relating to the elastic stability supported by masts or tower-like structures
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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
- E04B1/35—Extraordinary methods of construction, e.g. lift-slab, jack-block
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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
- E04B7/00—Roofs; Roof construction with regard to insulation
- E04B7/14—Suspended roofs
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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
- E04B1/35—Extraordinary methods of construction, e.g. lift-slab, jack-block
- E04B2001/3577—Extraordinary methods of construction, e.g. lift-slab, jack-block prefabricating a building and moving it as a whole to the erection site
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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
- E04B1/35—Extraordinary methods of construction, e.g. lift-slab, jack-block
- E04B2001/3583—Extraordinary methods of construction, e.g. lift-slab, jack-block using permanent tensioning means, e.g. cables or rods, to assemble or rigidify structures (not pre- or poststressing concrete), e.g. by tying them around the structure
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Abstract
The invention discloses a large-span space chord-supported spoke type truss structure system and a construction method, which relate to the technical field of civil engineering and comprise a dome part, wherein the dome part comprises an upper structure and a lower structure; the lower structure is arranged below the upper structure; the upper structure comprises a central ring truss, a middle ring truss, an outer ring truss, an inverted triangular truss and a secondary truss; the substructure includes circumferential cables, radial cables, stabilizing cables, and struts. The stability and the bearing capacity of the structure are enhanced, and the structure can realize the advantages of convenient construction, high structure bearing capacity, good stability and the like while the span is increased. The hydraulic synchronous sliding technology is adopted in construction, a reaction frame can be abandoned, the problem of reinforcing reaction points is solved, time and labor are saved, the hydraulic synchronous sliding technology is rigidly connected with a moved member, synchronous control is easy to realize, and the positioning precision is high. The lower part is composed of an annular cable and a radial cable, and the prestressed cable is tensioned by adopting a two-stage circulating tensioning method, wherein the annular cable is a passive tensioning cable, and the radial cable is an active tensioning cable.
Description
Technical Field
The invention relates to the technical field of civil engineering, in particular to a large-span space chord supporting wheel spoke type truss structure system and a construction method.
Background
In recent years, with the rapid development of economy and science and technology in China, the structural adjustment and technical transformation of the building industry are accelerated, and people gradually put forward higher requirements on buildings such as excellent performance, beautiful shape, large covering space and the like; the large stadiums in China are greatly improved in terms of quantity and specification, so that not only are basic conditions provided for various sports competition activities held by the nation, but also the application and development of a large-span space structure are greatly promoted.
The basic structural types commonly used for the large-span space structure at present are a grid structure, a reticulated shell structure, a suspended cable structure, a film structure and the like, and the suspended dome is a novel space structural system which is combined with rigidity and flexibility and is also one of the most representative prestressed steel structural types. The traditional string-supported dome structure system consists of a rigid single-layer latticed shell on the upper portion, a supporting rod and a prestressed stay cable, wherein the upper end of the supporting rod is hinged with a latticed shell node, and the lower end of the supporting rod is connected into a whole through a radial stay cable and an annular hoop cable. The structure system applies prestress to the lower inhaul cable, so that the single-layer reticulated shell generates displacement and internal force which are opposite to those of the single-layer reticulated shell under the action of normal load, the out-of-plane rigidity and the overall stability of the pure single-layer reticulated shell structure are effectively improved, and the stress performance of the structure is improved, so that the structure system has strong spanning capability; and compared with flexible cable nets, films and cable dome structures, the cable dome structure has lower design and construction difficulty.
At present, domestic research and application of a suspended dome structure are mainly concentrated in the range of 150m of span, the rigidity of a single-layer reticulated shell at the upper part of the suspended dome structure is low, and the problems of structural stability reduction, prestressed construction difficulty increase, structural dead weight obvious increase and the like can occur along with the increase of the span; if the upper structure is changed into a double-layer latticed shell with higher rigidity, the cost is higher and the construction process is complex; the cable dome structure with the span of 200m is adopted, so that the design and construction difficulty is increased.
Disclosure of Invention
In order to solve the technical problems, the invention provides a large-span space chord-supported wheel spoke type truss structure system, which can increase the span of the structure, simultaneously realize the advantages of convenient construction, high structural bearing capacity, good stability and the like, and can build a 200-300 m ultra-large-span chord-supported dome structure.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a large-span space spider spoke type truss structure system which comprises a dome part, a bridge part and a supporting part, wherein the dome part comprises an upper structure and a lower structure; the lower structure is arranged below the upper structure;
the upper structure comprises a central ring truss, a middle ring truss, an outer ring truss, an inverted triangular truss and a secondary truss, wherein the central ring truss, the middle ring truss and the outer ring truss are concentrically arranged, and the inverted triangular truss and the secondary truss are arranged between the central ring truss and the outer ring truss along the radiation direction and penetrate through the middle ring truss;
the lower structure comprises annular cables, radial cables, stabilizing cables and support rods; the top ends of the support rods are connected with the upper structure, and the circumferential cables are connected with the bottom ends of the support rods; one end of the radial cable is connected with the upper structure, the other end of the radial cable is connected with the bottom end of the support rod, and the radial cable is arranged along the horizontal direction; the stabilizing cables are arranged between two ends of two adjacent radial cables.
Optionally, the support part is arranged at the bottom of the dome part.
Optionally, the support portion comprises a plurality of Y-shaped lattice pillars; the top of the Y-shaped lattice column is connected with the outer ring truss.
Optionally, the central ring truss comprises a central upper chord, a central lower chord and a plurality of central web members; the central upper chord and the central lower chord are of annular structures with the same diameter, the central upper chord and the central lower chord are coaxially arranged, and the central web members are arranged between the central upper chord and the central lower chord.
Optionally, the central web members are arranged between the central upper chord and the central lower chord in a plurality of V-shapes.
Optionally, the middle ring truss comprises a middle outer upper chord, a middle inner upper chord, a middle lower chord, a middle web member and a middle tie rod; the middle outer upper chord and the middle inner upper chord are concentrically arranged, and the middle lower chord is arranged right below the position between the middle outer upper chord and the middle inner upper chord; the middle tie bar is arranged between the middle outer upper chord and the middle inner upper chord; the middle web member is arranged between the middle outer upper chord member and the middle lower chord member and between the middle inner upper chord member and the middle lower chord member.
Optionally, the outer ring truss comprises an outer upper chord, an outer inner upper chord, an outer lower chord, an outer inner lower chord, an outer web member and an outer tie bar; the outer upper chord and the outer inner upper chord are concentrically arranged, the outer lower chord and the outer inner lower chord are concentrically arranged, the outer lower chord is arranged right below the outer upper chord, and the outer inner lower chord is arranged right below the outer inner upper chord; the outer tie bars are disposed between the outer upper chord and the outer inner upper chord and between the outer lower chord and the outer inner lower chord; the outer web members are disposed between the outer upper chord and the outer inner lower chord and between the outer inner upper chord and the outer lower chord.
Optionally, the inverted triangular truss comprises a left upper chord, a right upper chord, a radiation lower chord, a radiation web member and a radiation tie rod; the left upper chord and the right upper chord are arranged at equal height along the radial direction of the dome part, the radiation lower chord is arranged right below the space between the left upper chord and the right upper chord, and the radiation web members are arranged between the left upper chord and the radiation lower chord and between the right upper chord and the radiation lower chord; the radiating tie bar is disposed between the upper left chord and the upper right chord.
Optionally, the secondary truss comprises a secondary honing upper chord, a secondary honing lower chord and a secondary honing web member; the lower secondary honing chord is arranged right below the upper secondary honing chord, and the web member is arranged between the upper secondary honing chord and the lower secondary honing chord.
The invention also discloses a construction method of the large-span space chord supporting wheel spoke type truss structure system, which comprises the following steps:
the first step is as follows: excavating a field, constructing a foundation, mounting a first section column, mounting a central temporary support jig frame at the central position of a structural system, assembling the inner ring central point support jig frame by adopting an assembled support frame, and symmetrically arranging stay cable wind ropes around the central temporary support jig frame and the inner ring central point support jig frame; temporary supporting jig frames are erected at the midspan positions of the trusses in a segmented mode;
the second step is that: prefabricating a processing steel structure of a processing factory, and pre-assembling the steel structure on the site ground into a central ring truss and a unit main truss, wherein the unit main truss comprises an inverted triangular truss and a secondary truss; the central ring truss is hoisted in sections in the field;
the third step: hoisting the Y-shaped latticed column and the unit main truss in sections, and overlapping the Y-shaped latticed column, the unit main truss and the central ring truss together to form a sliding unit; after each sliding unit is assembled, the steel structure is rotationally slid along the clockwise direction by adopting a hydraulic synchronous propelling device;
the specific construction process is as follows:
1. installing a sliding temporary structure, assembling a first sliding unit on the assembling jig frame, and installing a hydraulic crawler and sliding equipment; the hydraulic crawler is arranged on the steel rail, one end of the hydraulic crawler is connected with the sliding unit weight, the other end of the hydraulic crawler is connected with the steel rail, and the weight is pushed by the jacking force of a hydraulic system; the sliding equipment comprises a sliding support and a jig frame structure; the sliding support is a roof and track connecting structure, transmits load to a track and is used for being connected with a crawler; the jig frame structure bears the vertical force and the friction force of the central ring in the sliding process;
2. the assembled main truss of the first sliding unit is slid forwards by 18 degrees in an arc manner by using a hydraulic system, and the sliding is stopped;
3. hoisting a second section of Y-shaped latticed column, and assembling a second sliding unit on the assembling jig frame;
4. repeating the previous steps, and sliding all the unit main trusses in place;
the fourth step: taking the intersection points of the radiation lower chord of the inverted triangular truss and the central ring truss, the middle ring truss and the outer ring truss as anchoring points of the radial cables, and installing the radial cables; a vertical stay bar is arranged at the intersection point of the radial cable and the circumferential cable, and the upper end of the vertical stay bar is supported at the intersection point of the radiation lower chord of the inverted triangular truss and the central ring truss, the middle ring truss and the outer ring truss;
the fifth step: removing the central temporary support jig frame and the midspan temporary support jig frame;
and a sixth step: tensioning a cable structure, namely, adopting a construction process of stretching radial cables in batches in a fixed-length and graded manner by using an annular cable, and ensuring that the cable structure starts to be installed and tensioned after an upper steel structure is installed and welded in order to ensure the installation precision of a cable body; the distribution of internal force of the structure is adjusted, so that the upper structure and the lower structure can be organically combined without influencing respective stress, and favorable interaction is exerted; and (5) carrying out interior decoration and putting into use.
Compared with the prior art, the invention has the following technical effects:
1. the large-span space chord supporting wheel spoke type truss structure system enhances the integral stability and the bearing capacity of the structure, and can realize the advantages of convenient construction, high structural bearing capacity, good stability and the like while the span of the structure is increased.
2. The large-span space chord supporting wheel spoke type truss structure system adopts a hydraulic synchronous sliding technology in construction, a reaction frame can be abandoned by the technology, the reinforcing problem of a reaction point is saved, time and labor are saved, synchronous control is easy to realize due to rigid connection with a moved member, and the positioning precision is high.
3. The lower part of the large-span space chord supporting wheel spoke type truss structure system is composed of a circumferential cable and a radial cable, and a two-stage circulating tension method is adopted for tensioning the prestressed cable, wherein the circumferential cable is a passive tension cable, and the radial cable is an active tension cable.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a large span space chord supporting wheel spoke type truss structural system of the present invention;
FIG. 2 is a schematic plan view of a lower structure of a large span space spider spoke type truss structure system according to the present invention;
FIG. 3 is a schematic perspective view of a lower structure of a large span space spider spoke type truss structure system according to the present invention;
FIG. 4 is a schematic structural diagram of an inverted triangular truss in the large span space chord supporting wheel spoke type truss structural system of the present invention;
FIG. 5 is a schematic view of the installation structure of the stay bar in the large span space chord supporting wheel spoke type truss structure system of the present invention;
FIG. 6 is a schematic structural diagram of a central ring truss in the large span space spider spoke type truss structural system of the present invention;
FIG. 7 is a schematic structural diagram of a middle ring truss in the large span space chord supporting wheel spoke type truss structural system of the present invention;
FIG. 8 is a schematic structural diagram of an outer ring truss in the large span space chord supporting wheel spoke type truss structural system of the present invention;
FIG. 9 is a schematic structural diagram of a sub-truss in the large span space spider spoke type truss structural system of the present invention;
FIG. 10 is a schematic structural diagram of a first sliding unit spliced in the construction method of the large span space chord supporting wheel spoke type truss structural system;
FIG. 11 is a schematic structural diagram of a second sliding unit spliced in the construction method of the large span space chord supporting wheel spoke type truss structural system;
FIG. 12 is a schematic structural diagram of a plurality of sliding units spliced in the construction method of the large span space chord supporting wheel spoke type truss structural system;
fig. 13 is a schematic structural view of the construction method of the large span space chord supporting spoke type truss structural system with all the sliding units in place.
Description of reference numerals: 1. a central ring truss; 2. a middle ring truss; 3. an outer ring truss; 4. an inverted triangular truss; 5. a secondary truss; 6. a Y-shaped lattice column; 7. a circumferential cable; 8. a radial cable; 9. a stabilizing cable; 10. a stay bar; 11. an ear plate; 12. a cable clamp; 15. a main truss of the slippage unit;
1a, a central upper chord; 1b, a central lower chord; 1c, a central web member;
2a, a middle outer upper chord; 2b, middle inner upper chord; 2c, a middle lower chord; 2d, a middle web member; 2e, a middle tie bar;
3a, an outer upper chord; 3b, an outer inner upper chord; 3c, an outer lower chord; 3d, an outer inner lower chord; 3e, an outer web; 3f, an external tie bar;
4a, a left upper chord; 4b, an upper right chord; 4c, radiating the lower chord; 4d, a radiation web member; 4e, radiating tie-bar;
5a, secondary honing the upper chord; 5b, secondarily honing the lower chord; 5c, a secondary honing rod.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
as shown in fig. 1 to 9, the present embodiment provides a large span space spider truss structure system, comprising a dome portion including an upper structure and a lower structure; the lower structure is arranged below the upper structure;
the upper structure comprises a central ring truss 1, a middle ring truss 2 and an outer ring truss 3 which are concentrically arranged, and an inverted triangular truss 4 and a secondary truss 5 which are arranged between the central ring truss 1 and the outer ring truss 3 along the radial direction and penetrate through the middle ring truss 2;
the lower structure comprises a circumferential cable 7, a radial cable 8, a stabilizing cable 9 and a support rod 10; the top ends of the support rods 10 are connected with the upper structure, and the circumferential cables 7 are connected with the bottom ends of the plurality of support rods 10; one end of the radial cable 8 is connected with the upper structure, the other end of the radial cable 8 is connected with the bottom end of the support rod 10, and the radial cable 8 is arranged along the horizontal direction; the stabilizing cable 9 is arranged between two ends of two adjacent radial cables 8.
In this embodiment, the large span space spider spoke type truss structure system further comprises a supporting portion, and the supporting portion is disposed at the bottom of the dome portion.
The support portion comprises a plurality of Y-shaped lattice pillars 6; the tops of the Y-shaped lattice columns 6 are connected with the outer ring truss 3.
The central ring truss 1 comprises a central upper chord 1a, a central lower chord 1b and a plurality of central web members 1 c; the central upper chord member and the central lower chord member 1b are of annular structures with the same diameter, the central upper chord member and the central lower chord member 1b are coaxially arranged, and the central web members 1c are arranged between the central upper chord member and the central lower chord member 1 b.
The central web members 1c are arranged between the central upper chord member and the central lower chord member 1b in a plurality of V-shapes.
The middle ring truss 2 comprises a middle outer upper chord 2a, a middle inner upper chord 2b, a middle lower chord 2c, a middle web member 2d and a middle tie rod 2 e; the middle outer upper chord 2a and the middle inner upper chord 2b are concentrically arranged, and the middle lower chord 2c is arranged right below the position between the middle outer upper chord 2a and the middle inner upper chord 2 b; the middle tie bar 2e is disposed between the middle outer upper chord 2a and the middle inner upper chord 2 b; the middle web member 2d is disposed between the middle outer upper chord 2a and the middle lower chord 2c and between the middle inner upper chord 2b and the middle lower chord 2 c.
The outer ring truss 3 includes an outer upper chord 3a, an outer inner upper chord 3b, an outer lower chord 3c, an outer inner lower chord 3d, an outer web 3e, and an outer tie bar 3 f; the outer upper chord 3a and the outer inner upper chord 3b are concentrically arranged, the outer lower chord 3c and the outer inner lower chord 3d are concentrically arranged, the outer lower chord 3c is arranged right below the outer upper chord 3a, and the outer inner lower chord 3d is arranged right below the outer inner upper chord 3 b; the outer tie rods 3f are provided between the outer upper chord 3a and the outer inner upper chord 3b and between the outer lower chord 3c and the outer inner lower chord 3 d; the outer web members 3e are provided between the outer upper chord 3a and the outer inner lower chord 3d and between the outer inner upper chord 3b and the outer lower chord 3 c.
The inverted triangular truss 4 comprises a left upper chord 4a, a right upper chord 4b, a radiation lower chord 4c, a radiation web member 4d and a radiation tie rod 4 e; the left upper chord 4a and the right upper chord 4b are arranged at equal heights in the radial direction of the dome part, the radiation lower chord 4c is arranged right below between the left upper chord 4a and the right upper chord 4b, and the radiation web members 4d are arranged between the left upper chord 4a and the radiation lower chord 4c and between the right upper chord 4b and the radiation lower chord 4 c; the radiating tie bar 4e is disposed between the left upper chord 4a and the right upper chord 4 b.
The sub-truss 5 comprises a sub-honing upper chord 5a, a sub-honing lower chord 5b and a sub-honing web member 5 c; the sub-honing lower chord 5b is arranged right below the sub-honing upper chord 5a, and the sub-honing web member 5c is arranged between the sub-honing upper chord 5a and the sub-honing lower chord 5 b.
Example two:
as shown in fig. 10 to 13, the invention discloses a construction method of a large span space chord supporting spoke type truss structure system, which comprises the following steps:
the first step is as follows: excavating a field, constructing a foundation, mounting a first section column, mounting a central temporary support jig frame at the central position of a structural system, assembling the inner ring central point support jig frame by adopting an assembled support frame, and symmetrically arranging stay cable wind ropes around the central temporary support jig frame and the inner ring central point support jig frame; temporary supporting jig frames are erected at the midspan positions of the trusses in a segmented mode;
the second step is that: prefabricating a processing steel structure of a processing factory, and pre-assembling the steel structure on the site ground into a central ring truss 1 and a unit main truss, wherein the unit main truss comprises an inverted triangular truss 4 and a secondary truss 5; the central ring truss 1 is hoisted in sections in the field;
the third step: hoisting the Y-shaped latticed column 6 and the unit main truss in sections, and overlapping the Y-shaped latticed column 6, the unit main truss and the central ring truss 1 together to form a sliding unit; after each sliding unit is assembled, the steel structure is rotationally slid along the clockwise direction by adopting a hydraulic synchronous propelling device;
the specific construction process is as follows:
1. installing a sliding temporary structure, assembling a first sliding unit on the assembling jig frame, and installing a hydraulic crawler and sliding equipment; the hydraulic crawler is arranged on the steel rail, one end of the hydraulic crawler is connected with the sliding unit weight, the other end of the hydraulic crawler is connected with the steel rail, and the weight is pushed by the jacking force of a hydraulic system; the sliding equipment comprises a sliding support and a jig frame structure; the sliding support is a roof and track connecting structure, transmits load to a track and is used for being connected with a crawler; the jig frame structure bears the vertical force and the friction force of the central ring in the sliding process;
2. the assembled main truss 15 of the first sliding unit is slid forwards in an arc line for 18 degrees by using a hydraulic system, and the sliding is stopped;
3. hoisting a second section of Y-shaped latticed column 6, and assembling a second sliding unit on the assembling jig frame;
4. repeating the previous steps, and sliding all the unit main trusses in place;
the fourth step: taking the intersection points of the radiation lower chord 4c of the inverted triangular truss 4, the central ring truss 1, the middle ring truss 2 and the outer ring truss 3 as anchoring points of radial cables 8, and installing the radial cables 8; a vertical stay bar 10 is arranged at the intersection point of the radial cable 8 and the circumferential cable 7, and the upper end of the vertical stay bar 10 is supported at the intersection point of the radiation lower chord 4c of the inverted triangular truss 4 and the central ring truss 1, the middle ring truss 2 and the outer ring truss 3;
the fifth step: removing the central temporary support jig frame and the midspan temporary support jig frame;
and a sixth step: tensioning a cable structure, namely, adopting a construction process of stretching radial cables 8 in fixed length and graded batches by using circumferential cables 7, and ensuring that the cable structure starts to be installed and tensioned after the upper steel structure is installed and welded in order to ensure the installation precision of a cable body; the distribution of internal force of the structure is adjusted, so that the upper structure and the lower structure can be organically combined without influencing respective stress, and favorable interaction is exerted; and (5) carrying out interior decoration and putting into use.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (5)
1. A large span space spider spoke truss structure system comprising a dome section comprising an upper structure and a lower structure; the lower structure is arranged below the upper structure;
the upper structure comprises a central ring truss, a middle ring truss, an outer ring truss, an inverted triangular truss and a secondary truss, wherein the central ring truss, the middle ring truss and the outer ring truss are concentrically arranged, and the inverted triangular truss and the secondary truss are arranged between the central ring truss and the outer ring truss along the radiation direction and penetrate through the middle ring truss;
the lower structure comprises annular cables, radial cables, stabilizing cables and support rods; the top ends of the support rods are connected with the upper structure, and the circumferential cables are connected with the bottom ends of the support rods; one end of the radial cable is connected with the upper structure, the other end of the radial cable is connected with the bottom end of the support rod, and the radial cable is arranged along the horizontal direction; the stabilizing cables are arranged between two ends of two adjacent radial cables;
wherein the central ring truss comprises a central upper chord, a central lower chord, and a plurality of central web members; the central upper chord and the central lower chord are of annular structures with the same diameter, the central upper chord and the central lower chord are coaxially arranged, and the central web members are arranged between the central upper chord and the central lower chord;
and/or the middle ring truss comprises a middle outer upper chord, a middle inner upper chord, a middle lower chord, a middle web member and a middle tie rod; the middle outer upper chord and the middle inner upper chord are concentrically arranged, and the middle lower chord is arranged right below the position between the middle outer upper chord and the middle inner upper chord; the middle tie bar is arranged between the middle outer upper chord and the middle inner upper chord; the middle web members are arranged between the middle outer upper chord and the middle lower chord and between the middle inner upper chord and the middle lower chord;
and/or the outer ring truss comprises an outer upper chord, an outer inner upper chord, an outer lower chord, an outer inner lower chord, an outer web and an outer tie rod; the outer upper chord and the outer inner upper chord are concentrically arranged, the outer lower chord and the outer inner lower chord are concentrically arranged, the outer lower chord is arranged right below the outer upper chord, and the outer inner lower chord is arranged right below the outer inner upper chord; the outer tie bars are disposed between the outer upper chord and the outer inner upper chord and between the outer lower chord and the outer inner lower chord; the outer web members are disposed between the outer upper chord and the outer inner lower chord and between the outer inner upper chord and the outer lower chord;
and/or the inverted triangular truss comprises a left upper chord, a right upper chord, a radiation lower chord, a radiation web member and a radiation tie rod; the left upper chord and the right upper chord are arranged at equal height along the radial direction of the dome part, the radiation lower chord is arranged right below the space between the left upper chord and the right upper chord, and the radiation web members are arranged between the left upper chord and the radiation lower chord and between the right upper chord and the radiation lower chord; the radiating tie bar is disposed between the upper left chord and the upper right chord;
and/or the secondary truss comprises a secondary honing upper chord, a secondary honing lower chord and a secondary honing web member; the lower secondary honing chord is arranged right below the upper secondary honing chord, and the web member is arranged between the upper secondary honing chord and the lower secondary honing chord.
2. The large span space spider truss architecture of claim 1 further including a support section disposed at the base of the dome section.
3. The large span spatial chord-supported spoke truss structural system of claim 2, wherein the support section comprises a plurality of Y-lattice columns; the top of the Y-shaped lattice column is connected with the outer ring truss.
4. The large span space spider truss structure system of claim 1 wherein the plurality of central web members are disposed between the central upper chord and the central lower chord in a plurality of V-shapes.
5. The construction method of the large span space chord spoke type truss structure system according to any one of claims 1-4, which is characterized by comprising the following steps: the first step is as follows: excavating a field, constructing a foundation, mounting a first section column, mounting a central temporary support jig frame at the central position of a structural system, assembling the inner ring central point support jig frame by adopting an assembled support frame, and symmetrically arranging stay cable wind ropes around the central temporary support jig frame and the inner ring central point support jig frame; temporary supporting jig frames are erected at the midspan positions of the trusses in a segmented mode;
the second step is that: prefabricating a processing steel structure of a processing factory, and pre-assembling the steel structure on the site ground into a central ring truss and a unit main truss, wherein the unit main truss comprises an inverted triangular truss and a secondary truss; the central ring truss is hoisted in sections in the field;
the third step: hoisting the Y-shaped latticed column and the unit main truss in sections, and overlapping the Y-shaped latticed column, the unit main truss and the central ring truss together to form a sliding unit; after each sliding unit is assembled, the steel structure is rotationally slid along the clockwise direction by adopting a hydraulic synchronous propelling device;
the specific construction process is as follows:
1. installing a sliding temporary structure, assembling a first sliding unit on the assembling jig frame, and installing a hydraulic crawler and sliding equipment; the hydraulic crawler is arranged on the steel rail, one end of the hydraulic crawler is connected with the sliding unit weight, the other end of the hydraulic crawler is connected with the steel rail, and the weight is pushed by the jacking force of a hydraulic system; the sliding equipment comprises a sliding support and a jig frame structure; the sliding support is a roof and track connecting structure, transmits load to a track and is used for being connected with a crawler; the jig frame structure bears the vertical force and the friction force of the central ring in the sliding process;
2. the assembled main truss of the first sliding unit is slid forwards by 18 degrees in an arc manner by using a hydraulic system, and the sliding is stopped;
3. hoisting a second section of Y-shaped latticed column, and assembling a second sliding unit on the assembling jig frame;
4. repeating the previous steps, and sliding all the unit main trusses in place;
the fourth step: taking the intersection points of the radiation lower chord of the inverted triangular truss and the central ring truss, the middle ring truss and the outer ring truss as anchoring points of the radial cables, and installing the radial cables; a vertical stay bar is arranged at the intersection point of the radial cable and the circumferential cable, and the upper end of the vertical stay bar is supported at the intersection point of the radiation lower chord of the inverted triangular truss and the central ring truss, the middle ring truss and the outer ring truss;
the fifth step: removing the central temporary support jig frame and the midspan temporary support jig frame;
and a sixth step: tensioning a cable structure, namely, adopting a construction process of stretching radial cables in batches in a fixed-length and graded manner by using an annular cable, and ensuring that the cable structure starts to be installed and tensioned after an upper steel structure is installed and welded in order to ensure the installation precision of a cable body; the distribution of internal force of the structure is adjusted, so that the upper structure and the lower structure can be organically combined without influencing respective stress, and favorable interaction is exerted; and (5) carrying out interior decoration and putting into use.
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