CN108999290B - Combined lifting method for flexible cable net at lower part of cable bearing grid structure - Google Patents
Combined lifting method for flexible cable net at lower part of cable bearing grid structure Download PDFInfo
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- CN108999290B CN108999290B CN201811066754.1A CN201811066754A CN108999290B CN 108999290 B CN108999290 B CN 108999290B CN 201811066754 A CN201811066754 A CN 201811066754A CN 108999290 B CN108999290 B CN 108999290B
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- 238000000034 method Methods 0.000 title claims abstract description 41
- 230000002159 abnormal effect Effects 0.000 claims abstract description 51
- 239000000725 suspension Substances 0.000 claims abstract description 15
- 238000012544 monitoring process Methods 0.000 claims abstract description 13
- 238000010276 construction Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
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- 238000013461 design Methods 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
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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
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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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Abstract
The invention provides a combined lifting method of a flexible cable net at the lower part of a cable bearing grid structure, wherein the flexible cable net comprises a ring cable and a plurality of radial cables which are alternately connected with the ring cable, the lifting method selects the joint of the ring cable and each radial cable as a vertical lifting point or a radial diagonal lifting point, and the vertical lifting point and the radial diagonal lifting point are alternately arranged; mounting a vertical lifting tool cable at a vertical lifting point; mounting a radial cable-stayed tooling cable at one end of the radial cable at the radial cable-stayed suspension point, which is far away from the ring cable; applying a vertical lifting force upwards to the vertical lifting tooling cable, and simultaneously applying a radial diagonal force outwards and upwards to the radial diagonal tooling cable; and monitoring the configuration change of the flexible cable net, and keeping the configuration of the flexible cable net in accordance with the specification by adjusting the vertical lifting force and the radial diagonal force when the configuration change is abnormal. The invention solves the problems that the traditional flexible cable net lifting method is easy to deform and shift to collide with densely distributed bed-jig and the lifting efficiency is low.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a combined lifting method of a flexible cable net at the lower part of a cable bearing grid structure.
Background
With the continuous development of the social and economic level of China in recent years, the construction level of a novel large-span space structure in the construction industry is also continuously improved, a large number of hybrid space structure systems with unique shapes, novel structures and advanced technologies are developed, and constructed stadiums and airport exhibition buildings can become image business cards of a city and add a heavy ink and heavy color to the architectural landscape lines of various cities.
The cable bearing grid structure is a novel hybridization space structure and is formed by combining an upper single-layer latticed shell and a lower cable rod system. The lower cable-strut system is generally composed of a flexible cable net and struts. The flexible cable net comprises radial cables and circumferential cables. The vaulting pole includes vertical vaulting pole and slant vaulting pole. The rigidity of the whole structure is mainly provided by the flexible cable net, and the whole steel roof structure is supported by the establishment of the prestress of the flexible cable net, so that the structure presents a building appearance with large space span and beautiful structure modeling. Therefore, before the flexible cable net is subjected to tensioning construction, the whole structure is low in rigidity and safety, and the whole roof steel structure needs to be supported through densely distributed formworks. In the whole process of the structure prestress construction, the laying and installation work of the flexible cable net occupies most of the construction period, and the field construction difficulty is very high. By adopting the traditional flexible cable net lifting and mounting method, the flexible cable net is easy to deform and shift to collide with the densely distributed jig frame, and the lifting efficiency is low.
Disclosure of Invention
In order to overcome the defects in the prior art, a combined lifting method for a flexible cable net at the lower part of a cable-supported grid structure is provided so as to solve the problems that the flexible cable net is easy to deform and shift to collide with a densely-distributed jig frame and the lifting efficiency is low by adopting the traditional flexible cable net lifting and mounting method.
In order to achieve the above object, there is provided a method for lifting a flexible cable net under a cable-supported lattice structure, the flexible cable net including a looped cable and a plurality of radial cables connected to the looped cable at intervals, the method comprising the steps of:
selecting a joint of the ring cable and each radial cable as a vertical lifting point or a radial diagonal lifting point, wherein the vertical lifting points and the radial diagonal lifting points are alternately arranged;
providing a vertical lifting tooling cable, and installing the vertical lifting tooling cable at the vertical lifting point;
providing a radial diagonal-pulling tooling cable, and installing the radial diagonal-pulling tooling cable at one end, far away from the ring cable, of the radial cable at the radial diagonal-pulling hanging point;
applying a vertical lifting force to each vertical lifting tooling cable, wherein the vertical lifting force is vertically upward, and simultaneously applying a radial diagonal force to each radial diagonal tooling cable, and the radial diagonal force is obliquely upward and outward along a connecting line of two end points of the corresponding radial diagonal tooling cable;
and monitoring the position and shape changes of the flexible cable net in the lifting process, and keeping the position and shape of the flexible cable net in accordance with the regulations by adjusting the vertical lifting force and the radial diagonal pulling force when the changes are abnormal.
Further, the step of monitoring the change of the position and the shape of the flexible cable net in the lifting process comprises the following steps:
monitoring whether the loop cable at each vertical lifting point deviates from the shape and position of the projection of the loop cable, and judging that the loop cable at the vertical lifting point is abnormal when the loop cable at the vertical lifting point deviates from the shape and position of the projection of the loop cable;
and monitoring whether the radial cable at each radial cable-stayed suspension point deviates from the shape and position of the projection of the radial cable, and judging that the radial cable at the radial cable-stayed suspension point is abnormal when the radial cable at the radial cable-stayed suspension point deviates from the shape and position of the projection of the radial cable.
Further, when the change is abnormal, the step of adjusting the magnitude of the radial diagonal tension comprises:
when the ring cable at the vertical lifting point is abnormal and the ring cable at the vertical lifting point deviates towards the inner side of the ring cable, increasing the radial diagonal tension at two sides of the vertical lifting point of the abnormal ring cable, so that the abnormal ring cable is reset;
when the ring cable at the vertical lifting point is abnormal and the ring cable at the vertical lifting point deviates towards the outer side of the ring cable, reducing the radial diagonal tension at two sides of the vertical lifting point of the abnormal ring cable, and enabling the abnormal ring cable to reset.
Further, the step of adjusting the magnitude of the vertical lifting force during abnormal changes comprises:
when the radial cable at the radial inclined pulling hanging point is abnormal, the vertical lifting force of the vertical lifting tool cable on one side of the abnormal radial cable in the deviation direction is increased, and meanwhile, the vertical lifting force of the vertical lifting tool cable on the other side of the abnormal radial cable is reduced, so that the abnormal radial cable is reset.
Further, a plurality of the radial cables are arranged at equal intervals.
The combined lifting method for the flexible cable net at the lower part of the cable bearing grid structure has the beneficial effects that the combined lifting method is a novel combined lifting method of vertical lifting and radial diagonal pulling. The combined lifting method of the flexible cable net at the lower part of the cable-supported grid structure drives the whole flexible cable net to move upwards by the vertical lifting points, and the position and the shape of the ring cable are adjusted in the lifting process of the flexible cable net by keeping the radial cables of the radial diagonal pulling lifting points in a tight state, so that the shape and the position of the flexible cable net can be kept stable from tire removal to lifting in place, and the flexible cable net is prevented from hard collision with a tire frame and a concrete structure. The combined lifting method of the flexible cable net at the lower part of the cable-supported grid structure obviously improves the reliability and safety of the integral lifting of the flexible cable net.
Drawings
Fig. 1 is a schematic structural view of a flexible cable net of a cable-supported grid structure according to an embodiment of the present invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Referring to fig. 1, the flexible cable net includes a looped cable 11 and a radial cable 12. The ring cable is a single cable, and the ring cable is oval. A plurality of radial cables 12 are connected to the looped cables 11 at intervals. In the present embodiment, the plurality of radial cords are equally spaced. According to the design characteristics of the cable bearing grid structure, the ring cables 11 and the radial cables 12 are all unfolded and assembled on the ground to form the flexible cable net. All the stay cable clamps are arranged on the flexible cable net.
The invention provides a combined lifting method of a flexible cable net at the lower part of a cable bearing grid structure, which comprises the following steps:
s1: selecting the joint of the ring cable 11 and each radial cable 12 as a vertical suspension point A or a radial stayed suspension point B, wherein the vertical suspension point A and the radial stayed suspension point B are alternately arranged
S2: and providing a plurality of vertical lifting tool cables 3, and installing one vertical lifting tool cable 3 at one vertical lifting point.
S3: and providing a radial inclined pulling tooling cable, and installing the first end of the radial inclined pulling tooling cable at one end, far away from the ring cable 11, of the radial cable 12 at the radial inclined pulling hanging point. And the second end of the radial inclined pulling tooling cable is lapped on the ring beam 2 of the roof steel structure.
S4: and a vertical lifting force is applied to each vertical lifting tooling cable 3, the vertical lifting force is vertically upward, a radial diagonal force is applied to each radial diagonal tooling cable, and the radial diagonal force is obliquely upward and outward along a connecting line of two end points corresponding to the radial diagonal tooling cables.
The tool cable 3 is vertically lifted upwards through the lifting device, meanwhile, the radial oblique-pulling tool cable is obliquely lifted to the outer side of the ring cable 11 through the lifting device, so that the ring cable of the radial oblique-pulling lifting point is kept in a tight state, the position and the shape of the ring cable are adjusted through oblique tension of the radial oblique-pulling lifting point in the lifting process, the flexible cable net can keep stable in position and shape from being separated from the jig frame to being lifted in place, and the flexible cable net is prevented from being in hard collision with the jig frame and the concrete structure.
The radial cables of the vertical lifting point A can be suspended or inclined pulled and lifted along with the lifting of the flexible cable net.
S5: and monitoring the position and shape changes of the flexible cable net in the lifting process, and keeping the position and shape of the flexible cable net in accordance with the regulations by adjusting the vertical lifting force and the radial diagonal force when the changes are abnormal.
And S51, monitoring the position and shape change of the flexible cable net in the lifting process. Specifically, monitoring whether the ring cable at each vertical lifting point deviates from the shape and position of the projection of the ring cable, and judging that the ring cable at the vertical lifting point is abnormal when the ring cable at the vertical lifting point deviates from the shape and position of the projection of the ring cable; and monitoring whether the radial cable at each radial cable-stayed suspension point deviates from the projection shape and position of the radial cable, and judging that the radial cable deviating from the radial cable-stayed suspension point is abnormal when the radial cable at the radial cable-stayed suspension point deviates from the projection shape and position of the radial cable.
And S52, in the process of lifting the flexible cable net upwards vertically, when the change of the flexible cable net is abnormal, the vertical lifting force and the radial diagonal force are adjusted. In the process of lifting the flexible cable net upwards vertically, when the position or the shape of the ring cable 11 at a certain vertical lifting point A is abnormal, the lifting force of two adjacent radial cables 12 of the vertical lifting point A of the abnormal ring cable 11 is controlled, so that the ring cable 11 with the abnormal position or shape is reset, and the collision of densely distributed bed-jig is avoided. In the process of lifting the flexible cable net upwards and vertically, when the position or the shape of the radial cable 12 at a certain radial diagonal lifting point B is abnormal, the lifting force of the ring cables 11 at the two opposite sides of the abnormal radial diagonal lifting point B is controlled, so that the radial cable with the abnormal position or shape is reset, and the collision of densely-distributed bed-jig is avoided.
Specifically, when the loop cable at the vertical hanging and lifting point is abnormal and the loop cable at the vertical hanging and lifting point deviates towards the inner side of the loop cable, the radial diagonal tension on the two sides of the vertical hanging and lifting point of the abnormal loop cable is increased, so that the abnormal loop cable is reset.
When the ring cable at the vertical lifting point is abnormal and the ring cable at the vertical lifting point deviates towards the outer side of the ring cable, the radial diagonal tension at two sides of the vertical lifting point of the abnormal ring cable is reduced, so that the abnormal ring cable is reset.
When the radial cable at the radial cable-stayed suspension point is abnormal, the vertical lifting force of the vertical lifting tool cable on one side of the abnormal radial cable in the deviation direction is increased, and meanwhile, the vertical lifting force of the vertical lifting tool cable on the other side of the abnormal radial cable is reduced, so that the abnormal radial cable is reset.
The invention discloses a combined lifting method of a flexible cable net at the lower part of a cable-supported grid structure, which is a novel combined lifting method of vertical lifting and radial diagonal pulling. The combined lifting method of the flexible cable net at the lower part of the cable-supported grid structure drives the whole flexible cable net to move upwards by the vertical lifting points, and the position and the shape of the ring cable are adjusted in the lifting process of the flexible cable net by keeping the radial cables of the radial diagonal pulling lifting points in a tight state, so that the shape and the position of the flexible cable net can be kept stable from tire removal to lifting in place, and the flexible cable net is prevented from hard collision with a tire frame and a concrete structure. The combined lifting method of the flexible cable net at the lower part of the cable-supported grid structure obviously improves the reliability and safety of the integral lifting of the flexible cable net.
In the process of lifting the flexible cable net, the vertical lifting is mainly performed, and the radial inclined lifting is assisted, so that the safety, stability and controllability of the lifting of the flexible cable net are greatly improved, and the lifting and mounting efficiency of the flexible cable net is obviously improved; meanwhile, the vertical lift and the radial inclined lift play roles of mutual complementation and mutual adjustment, and in the lifting process, if the looped cable deviates from the safety position, the position and the shape of the looped cable deviating from the safety position can be adjusted by adjusting the radial cables on the two opposite sides of the looped cable; if the radial cable deviates from the safety position, the position of the radial cable deviating from the safety position can be adjusted by adjusting the lifting force of the vertical lifting points on the opposite sides of the radial cable.
It should be noted that the structures, ratios, sizes, and the like shown in the drawings attached to the present specification are only used for matching the disclosure of the present specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions of the present invention, so that the present invention has no technical essence, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
While the present invention has been described in detail and with reference to the embodiments thereof as illustrated in the accompanying drawings, it will be apparent to one skilled in the art that various changes and modifications can be made therein. Therefore, certain details of the embodiments are not to be interpreted as limiting, and the invention is to be defined by the scope of the appended claims.
Claims (5)
1. A method for combined lifting of a flexible cable net underneath a cable-supported lattice structure, wherein the flexible cable net comprises a looped cable and a plurality of radial cables connected to the looped cable at intervals, the method comprising the steps of:
selecting a joint of the ring cable and each radial cable as a vertical lifting point or a radial diagonal lifting point, wherein the vertical lifting points and the radial diagonal lifting points are alternately arranged;
providing a vertical lifting tooling cable, and installing the vertical lifting tooling cable at the vertical lifting point;
providing a radial diagonal-pulling tooling cable, and installing the radial diagonal-pulling tooling cable at one end, far away from the ring cable, of the radial cable at the radial diagonal-pulling hanging point;
applying a vertical lifting force to each vertical lifting tooling cable, wherein the vertical lifting force is vertically upward, and simultaneously applying a radial diagonal force to each radial diagonal tooling cable, and the radial diagonal force is obliquely upward and outward along a connecting line of two end points of the corresponding radial diagonal tooling cable;
and monitoring the position and shape changes of the flexible cable net in the lifting process, and keeping the position and shape of the flexible cable net in accordance with the regulations by adjusting the vertical lifting force and the radial diagonal pulling force when the changes are abnormal.
2. The combination lift method of claim 1, wherein the step of monitoring the change in position and shape of the flexible cable mesh during the lift comprises:
monitoring whether the loop cable at each vertical lifting point deviates from the shape and position of the projection of the loop cable, and judging that the loop cable at the vertical lifting point is abnormal when the loop cable at the vertical lifting point deviates from the shape and position of the projection of the loop cable;
and monitoring whether the radial cable at each radial cable-stayed suspension point deviates from the shape and position of the projection of the radial cable, and judging that the radial cable at the radial cable-stayed suspension point is abnormal when the radial cable at the radial cable-stayed suspension point deviates from the shape and position of the projection of the radial cable.
3. The combined lifting method according to claim 2, wherein the step of adjusting the magnitude of the radial diagonal tension in case of abnormal change comprises:
when the ring cable at the vertical lifting point is abnormal and the ring cable at the vertical lifting point deviates towards the inner side of the ring cable, increasing the radial diagonal tension at two sides of the vertical lifting point of the abnormal ring cable, so that the abnormal ring cable is reset;
when the ring cable at the vertical lifting point is abnormal and the ring cable at the vertical lifting point deviates towards the outer side of the ring cable, reducing the radial diagonal tension at two sides of the vertical lifting point of the abnormal ring cable, and enabling the abnormal ring cable to reset.
4. The combined lifting method according to claim 2, wherein the step of adjusting the magnitude of the vertical lifting force in case of abnormal change comprises:
when the radial cable at the radial inclined pulling hanging point is abnormal, the vertical lifting force of the vertical lifting tool cable on one side of the abnormal radial cable in the deviation direction is increased, and meanwhile, the vertical lifting force of the vertical lifting tool cable on the other side of the abnormal radial cable is reduced, so that the abnormal radial cable is reset.
5. A combined lifting method according to claim 1, characterised in that a plurality of said radial cords are equally spaced.
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| CN109750782A (en) * | 2019-01-24 | 2019-05-14 | 中建八局第三建设有限公司 | A kind of stadium vehicle width formula rope bearing structure construction method |
| CN111456224B (en) * | 2020-04-14 | 2021-04-27 | 金陵科技学院 | Light steel structure assembly and assembled space structure |
| CN111927094B (en) * | 2020-06-18 | 2021-12-24 | 东南大学 | Construction method for integrally lifting and tensioning double-layer cable net structure by drawing lower-layer cable net |
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