CN111088851A - Construction method of annular cable bearing grid structure with upper grid participating in balancing pre-tensioning force of inhaul cable - Google Patents
Construction method of annular cable bearing grid structure with upper grid participating in balancing pre-tensioning force of inhaul cable Download PDFInfo
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- CN111088851A CN111088851A CN202010031865.XA CN202010031865A CN111088851A CN 111088851 A CN111088851 A CN 111088851A CN 202010031865 A CN202010031865 A CN 202010031865A CN 111088851 A CN111088851 A CN 111088851A
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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
- 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
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Abstract
The invention discloses a construction method of an annular cable-supported grid structure with an upper grid participating in balancing the pretension of a stay cable, which comprises the following construction steps of ①, firstly installing a column and an outer ring, ②, then installing a jig frame capable of being pressed and pulled under the main grid, arranging a horizontal sliding device on the top of the jig frame, ③, then installing the main grid and a corresponding support rod on the jig frame, pressing the jig frame, ④, then installing and tensioning a lower cable net, pulling the jig frame and horizontally and relatively sliding the top end of the jig frame and the main grid, ⑤, then installing a cantilever grid and a corresponding support rod, ⑥, and finally removing the jig frame after installing part or all of a roof system.
Description
Technical Field
The invention relates to a construction method, in particular to a construction method of an annular cable bearing grid structure with an upper grid participating in balancing the pretension force of a stay cable, and belongs to the technical field of large-span space cable structures.
Background
In a large span space building, an annular cable-supported grid structure is generally composed of columns, an outer ring, an upper grid, a lower cable net and support rods, wherein the upper grid comprises a main grid and an overhanging grid, and the lower cable net comprises radial cables and circumferential cables. The outer ring is positioned at the top end of the column; the outer edge of the upper grid and the outer end of the radial cable are connected with the outer ring; the inner end of the radial cable is connected with the circumferential cable; the upper end of the stay bar is connected with the upper grid, and the lower end of the stay bar is connected with the radial cable and the circumferential cable. The lower part of the cable-supported grid structure supports the gravity load, and the compressed outer ring and the upper part of the grid structure balance the horizontal tension of the cable-supported grid to the top of the column. In stadium engineering, the interior of the annular cable-bearing lattice structure is open.
According to the design balance condition of the pretension force of the inhaul cable, the annular cable bearing grid structure can be divided into three categories, namely ① is balanced by an outer ring, ② is balanced by an upper grid, ③ is balanced by the outer ring and the upper grid together, wherein the upper grid participates in balancing the pretension force of the inhaul cable in the last two categories.
For the annular cable bearing grid structure with the upper grid balancing the pretension force of the stay cable, the conventional construction steps are as follows: setting up a jig frame only under pressure; hoisting the upper grids (including the main grids and the overhanging grids) to the jig frame in units; then installing a support under the main grid; then installing and tensioning a stay cable, and at the moment, bending the main grid upwards to separate from the jig frame; then installing a support under the overhanging grid; then the jig frame is removed; and finally, installing the roof. In large-scale stadium engineering, as the upper grid is greatly cantilevered, the bed moulds are often required to be respectively arranged below the main grid and the overhanging grid, and the measure cost of the bed moulds is high; moreover, the ring cable is often positioned between the two moulding beds, which is very unfavorable for the spreading and lifting installation of the ring cable; in addition, in order to avoid the overhanging grid from deflecting downwards, the support under the overhanging grid needs to be installed after the stay cable is stretched, and the overhanging grid also needs to be deflected upwards to be separated from the releasing frame through the top support. Therefore, a new solution to solve the above problems is urgently needed.
Disclosure of Invention
The invention provides a construction method of an annular cable bearing grid structure with an upper grid participating in balancing the pretension force of a stay rope, aiming at the problems in the prior art, the construction method accords with the mechanical characteristics of the cable bearing grid structure with the upper grid participating in balancing the pretension force of the stay rope, and is favorable for high-efficiency and high-precision construction molding.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a construction method of an annular cable bearing grid structure with an upper grid participating in balancing the pretensioning force of a stay cable comprises the following steps:
the first step is as follows: mounting the column and the outer ring;
the second step is that: mounting a jig frame, namely mounting the jig frame which can be stressed or pulled under the main grid, wherein the top end of the jig frame is provided with a horizontal sliding device; the horizontal displacement of the upper grid is not limited;
the third step: installing a main grid and a corresponding stay bar on the jig frame, and pressing the jig frame at the moment;
the fourth step: installing and tensioning the lower cable net, wherein the jig frame is tensioned and the top end of the jig frame and the main grid horizontally slide relatively;
the fifth step: installing overhanging grids and corresponding support rods;
and a sixth step: and (4) removing the jig frame after installing part or all of the roofing system.
Aiming at a cable bearing grid structure with an upper grid participating in balancing the pretensioning force of a stay cable, the construction method comprises the steps of firstly installing a column, an outer ring and a main grid in the first step, the second step and the third step, and then installing and tensioning a lower cable net in the fourth step, so that the main grid participates in balancing the pretensioning force of the stay cable; after the lower cable net is installed and tensioned, the overhanging grids are installed, a jig frame does not need to be arranged below the overhanging grids, and the ring cables are conveniently spread and lifted; in the second step, a jig frame which can be pressed or pulled is arranged, the elevation of the main grid is maintained when the stay cable is tensioned, and the installation precision of the subsequent fifth step is facilitated; in the fifth step, the overhanging grids can be directly butted with the main grids in a hoisting mode, and a jig frame does not need to be arranged under the overhanging grids; sixthly, reducing the pulling force of the jig frame when the jig frame is removed, and reducing the structural deformation after the jig frame is removed; in addition, a sliding groove or a closure section can be arranged on the annular member which does not participate in balancing the pretensioning force of the stay rope in the outer ring and the main grid, and the sliding groove or the closure section member is fixed after the stay rope is tensioned so as to regulate and control the distribution of the pre-pressure in the outer ring and the main grid. In a word, the construction method accords with the mechanical property of the cable bearing grid structure of which the upper grid participates in balancing the pretensioning force of the inhaul cable, and is favorable for high-efficiency and high-precision construction and forming.
Compared with the prior art, the construction method has the advantages that 1) the construction method comprises the steps of firstly installing the columns, the outer ring and the main grid in the first step, the second step and the third step, and then installing and tensioning the lower cable net in the fourth step, so that the main grid participates in balancing the pretension force of the stay cable; after the lower cable net is installed and tensioned, the overhanging grids are installed, a jig frame does not need to be arranged below the overhanging grids, and the ring cables are conveniently spread and lifted; 2) in the second step, a jig frame which can be pressed or pulled is arranged, the elevation of the main grid is maintained when the stay cable is tensioned, and the installation precision of the subsequent fifth step is facilitated; 3) sixthly, reducing the pulling force of the jig frame when the jig frame is removed, and reducing the structural deformation after the jig frame is removed; in addition, a sliding groove or a closure section can be arranged on the annular member which does not participate in balancing the pretensioning force of the stay rope in the outer ring and the main grid, and the sliding groove or the closure section member is fixed after the stay rope is tensioned so as to regulate and control the distribution of the pre-pressure in the outer ring and the main grid. In a word, the construction method accords with the mechanical property of the cable bearing grid structure of which the upper grid participates in balancing the pretensioning force of the inhaul cable, and is favorable for high-efficiency and high-precision construction and forming.
Drawings
FIG. 1 is an overall three-dimensional isometric view of a stadium I to which the invention is applicable;
FIG. 2 is a cross-sectional view of a single frame structure including a jig frame of a stadium I to which the present invention is applicable;
FIG. 3 is a schematic illustration of a first construction step of a stadium I in which the invention is applicable;
FIG. 4 is a schematic illustration of a second construction step of a stadium I to which the invention is applicable;
FIG. 5 is a schematic illustration of a third construction step of stadium I in which the invention is applicable;
FIG. 6 is a schematic illustration of a fourth construction step for stadium I in which the present invention is applicable;
FIG. 7 is a schematic illustration of a fifth construction step for stadium I in which the present invention is applicable;
FIGS. 8 and 9 are schematic views of a sixth construction step of a stadium I to which the invention is applicable;
description of reference numerals:
the novel roof truss comprises a stand 1, truss columns 2, main grids 3, outer support rods 4, inner support rods 5, annular cables 6, radial cables 7, overhanging grids 8, an outer ring moulding bed 9, an inner ring moulding bed 10 and a roof system 11.
The specific implementation mode is as follows:
for the purpose of enhancing an understanding of the present invention, the present embodiment will be described in detail below with reference to the accompanying drawings.
Example (b): a construction method of an annular cable bearing grid structure with an upper grid participating in balancing the pretensioning force of a stay cable comprises the following steps:
the first step is as follows: mounting the column and the outer ring;
the second step is that: mounting a jig frame, namely mounting the jig frame which can be stressed or pulled under the main grid, wherein the top end of the jig frame is provided with a horizontal sliding device; the horizontal displacement of the upper grid is not limited;
the third step: installing a main grid and a corresponding stay bar on the jig frame, and pressing the jig frame at the moment;
the fourth step: installing and tensioning the lower cable net, wherein the jig frame is tensioned and the top end of the jig frame and the main grid horizontally slide relatively;
the fifth step: installing overhanging grids and corresponding support rods;
and a sixth step: and (4) removing the jig frame after installing part or all of the roofing system.
The construction method comprises the steps of firstly installing columns, an outer ring and a main grid in the first step, the second step and the third step, and then installing and tensioning a lower cable net in the fourth step, so that the main grid participates in balancing the pretensioning force of a stay cable; after the lower cable net is installed and tensioned, the overhanging grids are installed, a jig frame does not need to be arranged below the overhanging grids, and the ring cables are conveniently spread and lifted; in the second step, a jig frame which can be pressed or pulled is arranged, the elevation of the main grid is maintained when the stay cable is tensioned, and the installation precision of the subsequent fifth step is facilitated; in the fifth step, the overhanging grids can be directly butted with the main grids in a hoisting mode, and a jig frame does not need to be arranged under the overhanging grids; sixthly, reducing the pulling force of the jig frame when the jig frame is removed, and reducing the structural deformation after the jig frame is removed; in addition, a sliding groove or a closure section can be arranged on the annular member which does not participate in balancing the pretensioning force of the stay rope in the outer ring and the main grid, and the sliding groove or the closure section member is fixed after the stay rope is tensioned so as to regulate and control the distribution of the pre-pressure in the outer ring and the main grid. In a word, the construction method accords with the mechanical property of the cable bearing grid structure of which the upper grid participates in balancing the pretensioning force of the inhaul cable, and is favorable for high-efficiency and high-precision construction and forming.
Application example 1: with reference to figures 1-9 of the drawings,
taking the cable bearing grid overhanging structure project of the upper grid of a certain stadium I participating in balancing the pretension of the stay cable as an example, the upper grid of the structure consists of a main grid 3 and an overhanging grid 8, and the lower grid consists of an annular cable 6 and a radial cable 7. 28 radial cables 7 are provided, each radial cable is provided with four support rods, namely three outer support rods 4 and one inner support rod 5, the lower ends of the four support rods are respectively connected with the radial cables 7 and the circumferential cables 6, the upper ends of the four support rods are respectively connected with the main grid 3 and the overhanging grid 8, as shown in figure 2,
the concrete construction steps are as follows:
the first step is as follows: installing the truss column 2, see fig. 3;
the second step is that: installing an outer ring jig frame 9 and an inner ring jig frame 10, as shown in figure 4;
the third step: mounting the main grid 3 and the outer struts 4 on the moulding beds 9 and 10, wherein the moulding beds are pressed, as shown in figure 5;
the fourth step: installing and tensioning the ring cables 6 and the radial cables 7, wherein the jig frame is tensioned, as shown in figure 6;
the fifth step: installing the overhanging grids 8 and the inner support rods 5, as shown in fig. 7;
and a sixth step: installing part or all of the roofing system 11, removing the moulding bed 9 and 10, and forming the structure, see fig. 8 and 9.
It should be noted that the above embodiment 1 is not intended to limit the scope of the present invention, and equivalent modifications and substitutions made on the basis of the above technical solutions are all within the scope of the present invention as defined in the claims.
Claims (5)
1. A construction method of an annular cable bearing grid structure with an upper grid participating in balancing the pretensioning force of a stay cable is characterized by comprising the following steps:
the first step is as follows: mounting the column and the outer ring;
the second step is that: mounting a jig frame;
the third step: installing a main grid and corresponding support rods;
the fourth step: installing and tensioning a lower cable net;
the fifth step: installing overhanging grids and corresponding support rods;
and a sixth step: and (4) removing the jig frame after installing part or all of the roofing system.
2. The method for constructing an annular cable-supported grid structure with an upper grid participating in balancing the pretensioning force of a stay cable according to claim 1, wherein a chute or a closure segment can be arranged on the annular member which does not participate in the pretensioning force of the stay cable in the outer ring and the main grid, and the chute or the closure segment member is fixed after the stay cable is tensioned.
3. The method as claimed in claim 1, wherein the jig frame in the second step is disposed under the main grid to maintain the elevation of the main grid during tensioning of the cables, thereby facilitating control of the installation accuracy of the overhanging grid in the fifth step.
4. The method for constructing an annular cable-bearing lattice structure with an upper lattice participating in balancing the pretensioning force of a tension cable according to claim 3, wherein the second step employs a jig frame which can be either pressed or pulled; in the third step the bed-jig is in compression and in the fourth step in tension.
5. A method of constructing an endless cable-supported lattice structure with an upper lattice for balancing the pretensioning force of cables according to claim 3, wherein the second step is performed by providing a horizontal sliding device at the top end of the jig frame without limiting the horizontal displacement of the upper lattice.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010031865.XA CN111088851A (en) | 2020-01-13 | 2020-01-13 | Construction method of annular cable bearing grid structure with upper grid participating in balancing pre-tensioning force of inhaul cable |
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| CN202010031865.XA CN111088851A (en) | 2020-01-13 | 2020-01-13 | Construction method of annular cable bearing grid structure with upper grid participating in balancing pre-tensioning force of inhaul cable |
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Cited By (3)
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| CN113279511A (en) * | 2021-07-02 | 2021-08-20 | 锦宸集团有限公司 | Cable bearing grid steel roof structure for stadium |
| CN114517531A (en) * | 2022-04-06 | 2022-05-20 | 中建八局第四建设有限公司 | Cable-supported grid structure pre-overlong V-shaped support device and installation method |
| CN117569588A (en) * | 2024-01-17 | 2024-02-20 | 北京建工集团有限责任公司 | Construction method of annular self-balancing closed folded plate reticulated shell structure |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113279511A (en) * | 2021-07-02 | 2021-08-20 | 锦宸集团有限公司 | Cable bearing grid steel roof structure for stadium |
| CN114517531A (en) * | 2022-04-06 | 2022-05-20 | 中建八局第四建设有限公司 | Cable-supported grid structure pre-overlong V-shaped support device and installation method |
| CN114517531B (en) * | 2022-04-06 | 2024-03-15 | 中建八局第四建设有限公司 | Pre-overlength V-shaped support device with cable-supported grid structure and installation method |
| CN117569588A (en) * | 2024-01-17 | 2024-02-20 | 北京建工集团有限责任公司 | Construction method of annular self-balancing closed folded plate reticulated shell structure |
| CN117569588B (en) * | 2024-01-17 | 2024-03-22 | 北京建工集团有限责任公司 | Construction method of annular self-balancing closed folded plate reticulated shell structure |
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Application publication date: 20200501 |