CN111719757B - Method and system for integrally lifting asymmetric inner ring truss and cable dome - Google Patents
Method and system for integrally lifting asymmetric inner ring truss and cable dome Download PDFInfo
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- CN111719757B CN111719757B CN202010560350.9A CN202010560350A CN111719757B CN 111719757 B CN111719757 B CN 111719757B CN 202010560350 A CN202010560350 A CN 202010560350A CN 111719757 B CN111719757 B CN 111719757B
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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
- 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
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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
- 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
- E04G21/16—Tools or apparatus
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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
- 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
- E04G21/16—Tools or apparatus
- E04G21/162—Handles to carry construction blocks
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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
- 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
- E04G21/16—Tools or apparatus
- E04G21/163—Jacks specially adapted for working-up building elements
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Abstract
The invention relates to an asymmetric inner ring truss and cable dome integral lifting method and a system thereof, wherein the method comprises the following steps: assembling to form an inner ring truss and a cable dome, and connecting the cable dome with the inner ring truss; arranging a plurality of lifting frames at intervals along the positions to be installed of the inner ring truss and fixing the lifting frames on the ground, and connecting the plurality of lifting frames; fixing a plurality of lifters on the tops of corresponding lifting frames, and correspondingly connecting the plurality of lifters with the inner ring truss; fixing a plurality of tractors on the tops of the corresponding lifting frames, and correspondingly connecting the tractors with the cable dome; the inner ring truss is lifted upwards horizontally by adopting a plurality of lifters, a plurality of tractors are adopted to stretch cable domes in the process of lifting the inner ring truss, and the cable domes are radially drawn by the tractors, so that the horizontal force is applied to the inner ring truss through the cable domes to control the horizontal displacement of the inner ring truss; and lifting the inner ring truss and the tension cable dome alternately until the inner ring truss reaches the designed elevation.
Description
Technical Field
The invention relates to the field of building construction, in particular to an asymmetric inner ring truss and cable dome integral lifting method and system.
Background
The large stadium awning system usually adopts a cable dome structure, wherein the large-opening sunflower-shaped cable dome structure comprises a supporting structure, an outer ring net rack, a large-opening cable dome and an inner ring truss, wherein the size of the inner ring truss is 150m multiplied by 110m, the north is high, the south is low, the height is 6.1 m-12.5 m, the self weight of the inner ring truss reaches 700t, the integral lifting weight of the inner ring truss and the cable dome reaches 1607t, the span is large, the weight is large, the cross and cooperative lifting difficulty is large, and the lifting can not be realized by adopting a traditional lifting support.
Chinese patent CN101446135A discloses an overall lifting system by a truss method for an ultra-high altitude ultra-long huge beam and a construction method thereof, and fig. 1 shows a schematic diagram of an overall lifting system by a truss method for an ultra-high altitude ultra-long huge beam in the prior art. Referring to fig. 1, the system comprises a lifting support, a formwork truss and a lifting power system, wherein the formwork truss comprises a main truss and end fixing trusses, the end fixing trusses are fixed on vertical structures on two sides of a huge beam, the lifting support is fixedly arranged on the fixing trusses on two ends, the lifting power system is fixed on the lifting support, and the lifting power system is connected with the main truss through a lifting steel strand.
However, because the inner ring truss is asymmetric in structure and uneven in gravity distribution, displacement, rotation and deviation in a plane are generated in the lifting process, the inner ring truss is easy to collide with a lifting frame, and potential safety hazards exist.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides an asymmetric inner ring truss and cable dome integral lifting method and a system thereof, and solves the problems that in the prior art, due to the asymmetric structure and the uneven gravity distribution of the inner ring truss, displacement, rotation and offset in a plane are generated in the lifting process, the lifting frame is easy to collide, and potential safety hazards exist.
The technical scheme for realizing the purpose is as follows:
the invention provides an integral lifting method for an asymmetric inner ring truss and a cable dome, which comprises the following steps:
assembling on the ground to form an inner ring truss and a cable dome, and correspondingly connecting the cable dome and the inner ring truss;
providing a plurality of lifting frames, arranging the lifting frames at intervals along the positions to be installed of the inner ring truss, fixing the lifting frames on the ground, and connecting the lifting frames with each other;
providing a plurality of lifters, fixing the plurality of lifters on the tops of the corresponding lifting frames, and correspondingly connecting the plurality of lifters and the inner ring truss;
providing a plurality of tractors, fixing the tractors on the top of the corresponding lifting frame, and correspondingly connecting the tractors and the cable dome;
lifting the inner ring truss horizontally and upwards by using a plurality of lifters, tensioning the cable dome by using a plurality of tractors during the lifting of the inner ring truss, radially dragging the cable dome by using the tractors, and applying horizontal force to the inner ring truss through the cable dome to control the horizontal displacement of the inner ring truss; and
and alternately lifting the inner ring truss and tensioning the cable dome until the inner ring truss reaches the designed elevation.
A further improvement of the asymmetric inner ring truss and cable dome integral lifting method of the present invention is that,
and in the process of lifting the inner ring truss, independently adjusting the vertical position of the corresponding part of the inner ring truss by adopting a corresponding lifter so as to adjust the vertical posture of the inner ring truss.
The invention further improves the method for integrally lifting the asymmetric inner ring truss and the cable dome, wherein a plurality of lifting frames are connected with each other, and the method comprises the following steps:
providing a first connecting frame, and horizontally drawing and fixing the first connecting frame on the tops of the plurality of lifting frames; and
after the inner ring truss is lifted to a height position above the middle part, a second connecting frame is provided to horizontally tie and fix the second connecting frame on the middle parts of the plurality of lifting frames.
The asymmetric inner ring truss and cable dome integral lifting method is further improved by providing a plurality of splayed struts, and fixing the splayed struts to the inner ring truss and corresponding to the lifting frames.
The invention further provides a further improvement of the integral lifting method of the asymmetric inner ring truss and the cable dome, wherein a plurality of pairs of wind-resistant cables are provided, each pair of wind-resistant cables are fixed on two opposite sides of the top of the corresponding lifting frame, one wind-resistant cable in each pair of wind-resistant cables is anchored with the outer ring truss, and the other wind-resistant cable in each pair of wind-resistant cables is anchored with the embedded structure in the yard.
The integral lifting method of the asymmetric inner ring truss and the cable dome is further improved in that an annular construction road is arranged outside the position to be mounted of the inner ring truss, the inner ring truss is assembled along the construction road by adopting a truck crane, and the lifting frame is erected by adopting a crawler crane.
The invention also provides an asymmetric inner ring truss and cable dome integral lifting system, wherein the inner ring truss is connected with the cable dome, and the lifting system comprises:
the lifting frames are arranged at intervals along the positions, to be installed, of the inner ring truss and are fixed on the ground, and the lifting frames are connected with each other;
the lifters are fixed at the tops of the corresponding lifting frames and are correspondingly connected with the inner ring truss, and the inner ring truss is horizontally and upwards lifted through the lifters; and
be fixed in the correspondence a plurality of tractors at hoisting frame top, and a plurality of tractor and cable dome correspond and connect, are promoting the in-process of inner ring truss is through a plurality of tractor stretch-draw cable dome, through the tractor is radial to be pull cable dome in order for with cable dome connects the inner ring truss is applyed the horizontal force and is realized control the horizontal displacement of inner ring truss.
The invention further improves the asymmetric inner ring truss and cable dome integral lifting system, which also comprises:
the horizontal drawknot is fixed on a first connecting frame at the top of the plurality of lifting frames; and
and after the inner ring truss is lifted to a height position above the middle part, the horizontal tie is fixed on a second connecting frame in the middle parts of the plurality of lifting frames.
The asymmetric inner ring truss and cable dome integral lifting system is further improved in that the system further comprises a plurality of splayed struts which are fixed on the inner ring truss and correspond to the lifting frames.
A further improvement of the asymmetric inner ring truss and cable dome integrated lift system of the present invention is that,
the wind-resistant hoisting frame is characterized by further comprising a plurality of pairs of wind-resistant cables fixed on the two opposite sides of the top of the corresponding hoisting frame, wherein one wind-resistant cable in each pair of wind-resistant cables is anchored with the outer ring net rack, and the other wind-resistant cable is anchored with an in-site embedded structure.
The method and the system for integrally lifting the asymmetric inner ring truss and the cable dome have the advantages that:
according to the invention, the cable dome is radially drawn by the tractor, so that the cable dome is stretched, and meanwhile, the displacement of the inner ring truss connected with the cable dome can be effectively controlled in a plane by utilizing the operation of radially drawing the cable dome by the tractor, so that the rotation and the offset of the inner ring truss in the lifting process are effectively controlled, the collision of the inner ring truss and the portal lifting frame is prevented, the safety and the reliability are greatly increased, and the problems that the inner ring truss is asymmetric in structure, uneven in gravity distribution, and likely to generate deflection in the plane in the lifting process and easily collide with the lifting frame are solved. In addition, the inner ring truss and the cable dome are lifted integrally by lifting the inner ring truss and opening the cable dome alternately, so that the truss lifting and the cable dome construction are carried out synchronously, the efficiency is improved, and the construction period progress is accelerated.
Drawings
Fig. 1 is a schematic diagram of an overall lifting system of an ultra-high altitude ultra-long giant beam truss method in the prior art.
Fig. 2 is a schematic plan view of an asymmetric inner ring truss and cable dome assembly of the present invention.
Fig. 3 is a cross-sectional view of an asymmetric inner ring truss and cable dome assembly of the present invention.
Fig. 4 is an elevational view of the installation of the asymmetric inner ring truss and cable dome integrated lift system of the present invention.
Fig. 5 is a view of the cable dome of fig. 3 at a portion a in a tensioned state.
Fig. 6 is a plan view of the ground assembly of the asymmetric inner ring truss and cable dome integrated lift system of the present invention.
Fig. 7 is a perspective view of an asymmetric inner ring truss and cable dome integrated lift system of the present invention.
Fig. 8 is a schematic plan view of the lifting frame and inner ring truss of the asymmetric inner ring truss and cable dome integrated lift system of the present invention.
Fig. 9 is a schematic plan view of the lifting frame and wind-resistant cables and inner ring truss of the asymmetric inner ring truss and cable dome integrated lifting system of the present invention.
Fig. 10 and 11 are partial elevational views of the lifting frames and inner ring truss of the asymmetric inner ring truss and cable dome integrated lift system of the present invention.
Fig. 12 is a perspective view of the lifting frame of fig. 11.
Fig. 13 is an elevational view of the wind resistant cables and inner ring truss of fig. 11.
Fig. 14 is an elevational view of the installation of the riser of the asymmetric inner ring truss and cable dome integrated lift system of the present invention.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
Referring to fig. 2, there is shown a schematic plan view of fig. 2 showing an entirety of the asymmetric inner ring truss and cable dome of the present invention. Fig. 3 is a cross-sectional view of an asymmetric inner ring truss and cable dome assembly of the present invention. Large stadium awning systems, as shown in connection with figures 2 and 3, often employ cable dome structures. However, most of cable dome structures at home and abroad are closed structures, and the cable dome structure with the large opening sunflower-shaped is adopted in the invention. The large-opening sunflower-shaped cable dome structure comprises a supporting structure 10, an outer ring net rack 20, a cable dome 30 and an inner ring truss 40, wherein the inner ring truss 40 is high in north and low in south, so that the structure is asymmetric, and the outer ring net rack 20, the cable dome 30 and the inner ring truss 40 are all annular. Because the structure of inner ring truss 40 is asymmetric, and gravity distributes unevenly, will produce displacement in the plane in the lift process, rotation and skew, easily collide with other structures, have the potential safety hazard.
Referring to fig. 4, an elevation view of an installation of the asymmetric inner ring truss and cable dome integrated lift system of the present invention is shown. Fig. 5 is a view of the cable dome of fig. 3 at a portion a in a tensioned state. Fig. 6 is a plan view of the ground assembly of the asymmetric inner ring truss and cable dome integrated lift system of the present invention. Fig. 7 is a perspective view of an asymmetric inner ring truss and cable dome integrated lift system of the present invention. Referring to fig. 2 to 7, the method for integrally lifting an asymmetric inner ring truss and a cable dome of the present invention comprises:
assembling the inner ring truss 40 and the cable dome 30 on the ground, and correspondingly connecting the cable dome 30 with the inner ring truss 40;
providing a plurality of lifting frames 50, arranging and fixing the plurality of lifting frames 50 at intervals along the positions to be installed of the inner ring truss 40 on the ground, and connecting the plurality of lifting frames 50 with each other;
providing a plurality of lifters 60, fixing the plurality of lifters 60 on top of the corresponding lifting frame 50, and correspondingly connecting the plurality of lifters 60 and the inner ring truss 40;
providing a plurality of retractors 70, securing the plurality of retractors 70 on top of the corresponding lifting frame 50, and correspondingly coupling the plurality of retractors 70 and the cable dome 30;
lifting the inner ring truss 40 horizontally and upwardly using a plurality of lifters 60, expanding the cable domes 30 using a plurality of retractors 70 during the lifting of the inner ring truss 40, radially retracting the cable domes 30 by the retractors 70, thereby applying a horizontal force to the inner ring truss 40 through the cable domes 30 to control the horizontal displacement of the inner ring truss 40; and
and lifting the inner ring truss 40 and the tension cable dome 30 alternately until the inner ring truss 40 reaches the designed elevation.
According to the invention, the cable dome is radially drawn by the tractor, so that the cable dome is stretched, and meanwhile, the displacement of the inner ring truss connected with the cable dome can be effectively controlled in a plane by utilizing the operation of radially drawing the cable dome by the tractor, so that the rotation and the offset of the inner ring truss in the lifting process are effectively controlled, the collision of the inner ring truss and the portal lifting frame is prevented, the safety and the reliability are greatly increased, and the problems that the inner ring truss is asymmetric in structure, uneven in gravity distribution, and likely to generate deflection in the plane in the lifting process and easily collide with the lifting frame are solved. In addition, the inner ring truss and the cable dome are lifted integrally by lifting the inner ring truss and opening the cable dome alternately, so that the truss lifting and the cable dome construction are carried out synchronously, the efficiency is improved, and the construction period progress is accelerated.
As a preferred embodiment of the method for integrally lifting the asymmetric inner ring truss and the cable dome according to the present invention, in the process of lifting the inner ring truss 40, the corresponding lifter 60 is used to independently adjust the vertical position of the corresponding portion of the inner ring truss 40, so as to adjust the vertical posture of the inner ring truss 40.
As a preferred embodiment of the method for integrally lifting the asymmetric inner ring truss and the cable dome according to the present invention, as shown in fig. 6, the method further includes the steps of arranging an annular construction road 90 along the outside of the position to be installed of the inner ring truss 40, assembling the inner ring truss 40 along the construction road 90 by using a truck crane, and erecting the lifting frame 50 by using a crawler crane.
Specifically, the top center of the cable dome 30 is a steel tension ring 31. According to the site condition of the construction site, part of the steel pull ring 31 needs to be assembled on a stand for watching a stadium. A circumferential construction road 90 is provided along the steel tension ring 31 in the yard. And assembling an inner ring truss along the ring direction of the 150t truck crane to the construction road 90. Meanwhile, the hoisting frame 50 is erected by using a 300t crawler crane. The inner ring truss 40 is integrally assembled on the ground and then is subjected to lifting construction.
Specifically, referring to fig. 8, a schematic plan view of the inner ring truss and the lifting frame of the asymmetric inner ring truss and cable dome integrated lifting system of the present invention is shown. Fig. 9 is a schematic plan view of the lifting frame and wind-resistant cables and inner ring truss of the asymmetric inner ring truss and cable dome integrated lifting system of the present invention. As shown in fig. 2 to 9, twelve lifting points are provided on the upper chord of the inner ring truss 40 during the process of integrally assembling the inner ring truss on the ground, so as to place the subsequent lifting frame.
After the inner ring truss 40 is assembled, a single lifting frame is arranged at each lifting point. Specifically, the lift frame 50 is a portal lift frame. Embedments are placed within the bottom foundation of the lifting frame 50. The foundation part region of hoisting frame lower part falls on the stand region, and the part falls on the pre-buried basis on the place in the yard, wherein falls on the regional hoisting frame lower part of stand and sets up the conversion roof beam, and the conversion roof beam falls on the stand roof beam, sets up the basis in conversion roof beam lower part local area simultaneously to the stability of promotion gate-type hoisting frame.
As a preferred embodiment of the method for integrally lifting the asymmetric inner ring truss and the cable dome of the present invention, reference is made to fig. 10 and 11, which are partial elevation views of the lifting frame and the inner ring truss of the system for integrally lifting the asymmetric inner ring truss and the cable dome of the present invention. As shown in fig. 2 to 11, the plurality of lifting frames 50 are connected to each other, and include: providing a first connecting frame 51, and horizontally drawing and fixing the first connecting frame 51 on the tops of the plurality of lifting frames 50; and after the inner ring truss 40 is lifted to a height position above the middle part, providing a second connecting frame 52, and horizontally drawing and fixing the second connecting frame 52 to the middle parts of the plurality of lifting frames 50. Set up horizontal linking frame between the hoisting frame and connect into whole in order to guarantee annular stability.
Specifically, after the inner steel tab is lifted to an elevation of 40m, the posture of the inner ring truss 40 is adjusted, and the second linking frame 52 is installed at an installation height of 25 m.
As a preferred embodiment of the method for integrally lifting the asymmetric inner ring truss and the cable dome according to the present invention, the present invention further comprises providing a plurality of splay struts 41, and fixing the splay struts 41 to the inner ring truss 40 and corresponding to the lifting frame 50. In order to transfer force directly, splayed struts 41 are arranged below each lifting point of the inner ring truss 40 to be used as structural reinforcing rods, and the splayed struts 41 can enable the lifting force of the lifting point positioned in the middle of the upper chord to be transferred to the node of the inner ring truss 40 more directly.
Fig. 12 is a perspective view of the lifting frame of fig. 11. Referring to fig. 12, each lifting point is provided with a door type lifting frame 50 composed of a double-lattice type support frame, a single lifting frame is formed by combining a 12.7m standard section, a 6.7m standard section and a 3.5m non-standard section, the plane size of the standard section is 3mX3m, and an independent foundation is arranged at the lower part of the standard section.
Referring to fig. 13, an elevation view of the wind-resistant cable and the inner ring truss of fig. 11 is provided as a preferred embodiment of the method for integrally lifting the asymmetric inner ring truss and the cable dome of the present invention. Referring to fig. 13, a plurality of pairs of wind-resistant cables 80 are provided, each pair of wind-resistant cables 80 being fixed to opposite sides of the top of the corresponding lifting frame 50, one wind-resistant cable 80 of each pair of wind-resistant cables 80 being anchored to the outer ring net mount 20 and the other wind-resistant cable 80 being anchored to the in-site embedded structure 81. Namely, each hoisting frame is provided with an outer ring wind-resistant cable which is anchored with the outer ring net rack. And then an inner ring wind-resistant cable is arranged to be anchored with the embedded concrete in the yard.
Referring to fig. 14, an elevation view of the installation of the riser of the asymmetric inner ring truss and cable dome integrated lift system of the present invention is shown. Referring to fig. 14, the lifter 60 is a hydraulic lifting device, and is composed of hydraulic oil, an oil pipe, a jack, a pump source, a calculator control system, and the like. The hydraulic lifting equipment mainly adopts a core-through hydraulic lifter, and selects TS-100 and TS-200 hydraulic lifters. Flexible steel strands are used as load-bearing rigging.
Specifically, the core-through lifter is an actuating mechanism of a hydraulic lifting system, and two ends of a lifting main oil cylinder are provided with controllable upper and lower anchorage oil cylinders so as to control the lifting process by matching with the main oil cylinder. When the component ascends: the upper anchor tightly clamps the steel strand by using mechanical self-locking of the anchor sheet, the main oil cylinder extends the cylinder, and the steel strand is stretched once, so that the lifted component is lifted for one stroke; the main cylinder retracts after the full stroke, so that the load is transferred to the lower anchor, and the upper anchor is released. Repeating the above steps, the lifted member can be lifted to a predetermined position. When the component descends: there will be a self-locking release process of either the upper or lower anchor. The coordination control of the main oil cylinder and the upper and lower anchorage cylinders is realized by a computer through a hydraulic system. The hydraulic lifting process is shown in the following block diagram, and one process is one stroke of the hydraulic lifter. When the hydraulic lifter is periodically and repeatedly operated, the lifted heavy object moves upwards step by step.
The method also comprises the step of integrally lifting the inner ring truss. Specifically, the structural unit is loaded in stages and lifted in a trial mode according to the counter force value of each lifting point calculated by computer simulation, and the pressure of a hydraulic lifting system extending cylinder at each lifting point is slowly increased in stages and is 20%, 40%, 60% and 80% in sequence; under the condition that no abnormity of each part is confirmed, the loading can be continued to 90 percent, 95 percent and 100 percent until the structure is completely separated from the assembly jig frame.
In the process of hierarchical loading, after each step of hierarchical loading is finished, suspending and checking the steps as follows: the deformation conditions before and after loading of the upper lifting point, the lower lifting point structure, the structure and the like, and the stability of the steel column structure and the like are improved. And under all normal conditions, continuing the next step of hierarchical loading.
Then, the structure is inspected from the ground. After the structural unit leaves the assembly jig frame by about 0.2m, the structural unit is locked by utilizing a hydraulic lifting system device, stays in the air and is comprehensively checked, and the structural unit comprises a lifting point structure, a bearing system, a lifting device and the like. All the checks are normal and correct, and then the formal promotion is carried out.
And then carrying out preliminary attitude detection and adjustment. And detecting the ground clearance of each lifting point by using a measuring instrument, and calculating the relative height difference of each lifting point. The height of each lifting point is adjusted through hydraulic lifting system equipment, so that the structure reaches a horizontal posture.
And resetting the displacement sensor by taking the height of each lifting point after adjustment as a new initial position. During the lifting of the structure, the attitude is maintained until the structure is lifted to the vicinity of the design level.
The attitude of the inner ring truss is adjusted during the lifting process, and specifically,
the structure is in the lift process, because height fine adjustment needs to be carried out to aerial attitude adjustment and member butt joint etc.. Meanwhile, the position in the plane is ensured, and the inner ring truss is prevented from deflecting and colliding with the lifting frame.
Adjusting the vertical posture: the hydraulic lifters of all hoisting points in the whole hydraulic lifting system are synchronously jogged, ascended or descended, or a single hydraulic lifter is jogged and adjusted, so that the requirement of the designed posture is met.
Adjusting the horizontal posture: because the inner ring truss is asymmetric in structure and uneven in gravity distribution, deflection in a plane is generated in the lifting process and collides with the lifting frame. The tension of the traction cable is controlled, namely the lifting jack of the ridge cable is adjusted, horizontal force is applied to the inner ring girder, and the plane deflection swing of the inner ring truss is controlled.
And installing cable domes in the integral lifting process of the inner ring truss, and alternately opening the cable domes and lifting the inner ring truss until the inner ring truss reaches the designed elevation.
The structure is suspended after being lifted to a design position; fine adjustment of each lifting point enables each layer of chord members of the truss to be accurately lifted to reach the designed position; the hydraulic lifting system equipment stops working, the air posture of the structural unit is kept, the rod pieces and the corbels in each layer are welded and fixed in an opposite mode, the rod pieces are made up, and a stable stress system is formed in the structure. In the process, the cable net system is mainly tensioned, the inner ring truss is lifted as an auxiliary, and the lifting of the inner ring truss needs to be matched with the tensioning of the cable net system.
After installation, the riser is unloaded and the lifting frame is removed. Specifically, the hydraulic lifting system equipment is synchronously unloaded until the steel strand is completely loosened; carrying out subsequent high-altitude installation of the structure; and (5) dismantling hydraulic lifting system equipment and related temporary measures to complete the lifting installation of the structural unit. And (4) dismantling the door type lifting frame, and lowering the through jack and the connecting truss to the ground.
The invention also provides an asymmetric inner ring truss and cable dome integral lifting system, wherein the inner ring truss 40 is connected with the cable dome 30, and the lifting system comprises:
a plurality of lifting frames 50 which are arranged at intervals along the positions to be installed of the inner ring truss 40 and fixed on the ground, and the plurality of lifting frames 50 are connected with each other;
a plurality of lifters 60 fixed to the tops of the corresponding lifting frames 50, and the plurality of lifters 60 and the inner ring truss 40 are correspondingly connected, and the inner ring truss 40 is horizontally lifted up by the plurality of lifters 60; and
a plurality of retractors 70 fixed to the top of the corresponding lifting frame 50 and the plurality of retractors 70 are correspondingly coupled to the cable domes 30, and controlling the horizontal displacement of the inner ring truss 40 is accomplished by expanding the cable domes 30 through the plurality of retractors 70 during the lifting of the inner ring truss 40 and radially drawing the cable domes 30 through the retractors 70 to apply a horizontal force to the inner ring truss 40 coupled to the cable domes 30.
As a preferred embodiment of the asymmetric inner ring truss and cable dome integral lifting system of the present invention, the system further comprises:
a first tie frame 51 fixed to the top of the plurality of lifting frames 50; and
after the inner ring truss 40 is lifted to a height position above the middle portion, the horizontal tie is fixed to the second linking frame 52 at the middle portion of the plurality of lifting frames 50.
As a preferred embodiment of the asymmetric inner ring truss and cable dome integrated lifting system of the present invention, a plurality of splayers 41 fixed to the inner ring truss 40 and corresponding to the lifting frame 50 are further included.
As a preferred embodiment of the asymmetric inner-ring truss and cable dome integrated lifting system of the present invention, further comprises a plurality of pairs of wind-resistant cables 80 fixed to opposite sides of the top of the corresponding lifting frame 50, one wind-resistant cable 80 of each pair of wind-resistant cables 80 being anchored to the outer ring grid 20 and the other wind-resistant cable 80 being anchored to the in-plant embedded structure 81.
The method and the system for integrally lifting the asymmetric inner ring truss and the cable dome have the advantages that:
according to the invention, the cable dome is radially drawn by the tractor, so that the cable dome is stretched, and meanwhile, the displacement of the inner ring truss connected with the cable dome can be effectively controlled in a plane by utilizing the operation of radially drawing the cable dome by the tractor, so that the rotation and the offset of the inner ring truss in the lifting process are effectively controlled, the collision of the inner ring truss and the portal lifting frame is prevented, the safety and the reliability are greatly increased, and the problems that the inner ring truss is asymmetric in structure, uneven in gravity distribution, and likely to generate deflection in the plane in the lifting process and easily collide with the lifting frame are solved. In addition, the inner ring truss and the cable dome are lifted integrally by lifting the inner ring truss and opening the cable dome alternately, so that the truss lifting and the cable dome construction are carried out synchronously, the efficiency is improved, and the construction period progress is accelerated.
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 scope of the invention is to be determined by the appended claims.
Claims (10)
1. An asymmetric inner ring truss and cable dome integral lifting method is characterized by comprising the following steps:
assembling on the ground to form an inner ring truss and a cable dome, and correspondingly connecting the cable dome and the inner ring truss;
providing a plurality of lifting frames, arranging the lifting frames at intervals along the positions to be installed of the inner ring truss, fixing the lifting frames on the ground, and connecting the lifting frames with each other;
providing a plurality of lifters, fixing the plurality of lifters on the tops of the corresponding lifting frames, and correspondingly connecting the plurality of lifters and the inner ring truss;
providing a plurality of tractors, fixing the tractors on the top of the corresponding lifting frame, and correspondingly connecting the tractors and the cable dome;
lifting the inner ring truss horizontally and upwards by using a plurality of lifters, tensioning the cable dome by using a plurality of tractors during the lifting of the inner ring truss, radially dragging the cable dome by using the tractors, and applying horizontal force to the inner ring truss through the cable dome to control the horizontal displacement of the inner ring truss; and
and alternately lifting the inner ring truss and tensioning the cable dome until the inner ring truss reaches the designed elevation.
2. The asymmetric inner ring truss and cable dome integral lift method of claim 1,
and in the process of lifting the inner ring truss, independently adjusting the vertical position of the corresponding part of the inner ring truss by adopting a corresponding lifter so as to adjust the vertical posture of the inner ring truss.
3. The asymmetric inner ring truss and cable dome integral lift method as recited in claim 1 wherein interconnecting a plurality of said lift frames comprises:
providing a first connecting frame, and horizontally drawing and fixing the first connecting frame on the tops of the plurality of lifting frames; and
after the inner ring truss is lifted to a height position above the middle part, a second connecting frame is provided to horizontally tie and fix the second connecting frame on the middle parts of the plurality of lifting frames.
4. The asymmetric inner ring truss and cable dome integral lift method of claim 1,
the method further comprises the step of providing a plurality of splayed struts, and fixing the splayed struts on the inner ring truss and corresponding to the lifting frame.
5. The asymmetric inner ring truss and cable dome integral lift method of claim 1,
and providing a plurality of pairs of wind-resistant cables, fixing each pair of wind-resistant cables to the corresponding opposite two sides of the top of the lifting frame, wherein one wind-resistant cable in each pair of wind-resistant cables is anchored with the outer ring net rack, and the other wind-resistant cable is anchored with the embedded structure in the yard.
6. The asymmetric inner ring truss and cable dome integral lift method of claim 1,
the construction method is characterized by further comprising a construction road in the circumferential direction arranged outside the position to be installed of the inner ring truss, the inner ring truss is assembled along the construction road through a truck crane, and the lifting frame is erected through a crawler crane.
7. An asymmetric inner ring truss and cable dome integrated lift system, the inner ring truss and cable dome connected, the lift system comprising:
the lifting frames are arranged at intervals along the positions, to be installed, of the inner ring truss and are fixed on the ground, and the lifting frames are connected with each other;
the lifters are fixed at the tops of the corresponding lifting frames and are correspondingly connected with the inner ring truss, and the inner ring truss is horizontally and upwards lifted through the lifters; and
be fixed in the correspondence a plurality of tractors at hoisting frame top, and a plurality of tractor and cable dome correspond and connect, are promoting the in-process of inner ring truss is through a plurality of tractor stretch-draw cable dome, through the tractor is radial to be pull cable dome in order for with cable dome connects the inner ring truss is applyed the horizontal force and is realized control the horizontal displacement of inner ring truss.
8. The asymmetric inner ring truss and cable dome integrated lift system as recited in claim 7 further comprising:
the horizontal drawknot is fixed on a first connecting frame at the top of the plurality of lifting frames; and
and after the inner ring truss is lifted to a height position above the middle part, the horizontal tie is fixed on a second connecting frame in the middle parts of the plurality of lifting frames.
9. The asymmetric inner ring truss and cable dome integrated lift system of claim 7,
the lifting frame is characterized by further comprising a plurality of splayed struts which are fixed on the inner ring truss and correspond to the lifting frame.
10. The asymmetric inner ring truss and cable dome integrated lift system of claim 7,
the wind-resistant hoisting frame is characterized by further comprising a plurality of pairs of wind-resistant cables fixed on the two opposite sides of the top of the corresponding hoisting frame, wherein one wind-resistant cable in each pair of wind-resistant cables is anchored with the outer ring net rack, and the other wind-resistant cable is anchored with an in-site embedded structure.
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| CN112627346A (en) * | 2020-12-09 | 2021-04-09 | 浙江精工钢结构集团有限公司 | High and large support group for lifting and construction method thereof |
| CN113622576B (en) * | 2021-09-08 | 2022-11-25 | 中国建筑第四工程局有限公司 | Swivel construction method for structural space of steel cover shed roof of ultra-large stadium |
| CN114941433B (en) * | 2022-05-19 | 2024-05-03 | 上海宝冶集团有限公司 | Construction method of high-weight ship type daylighting roof steel structure |
| CN115030322B (en) * | 2022-06-24 | 2024-06-07 | 中建八局第二建设有限公司 | Dome steel structure integral lifting construction method |
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