CN114961279A - Steel roof truss construction method - Google Patents
Steel roof truss construction method Download PDFInfo
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- CN114961279A CN114961279A CN202210432982.6A CN202210432982A CN114961279A CN 114961279 A CN114961279 A CN 114961279A CN 202210432982 A CN202210432982 A CN 202210432982A CN 114961279 A CN114961279 A CN 114961279A
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- hydraulic
- sliding
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- steel truss
- roof
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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
- 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
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C3/11—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with non-parallel upper and lower edges, e.g. roof trusses
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- E—FIXED CONSTRUCTIONS
- 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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- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention discloses a steel roof truss construction method, which adopts a roof truss sliding device comprising a track beam, a sliding vehicle and a hydraulic crawler; the track beam consists of a bottom plate, a clamping base, a connecting part and a guide rail, the sliding vehicle is provided with a frame, a bearing plate is fixed on the top surface of the frame, a plurality of bearing rods are arranged at the bottom of the frame, and two ends of each bearing rod can be rotatably provided with a wheel and are fixedly provided with L-shaped limiting parts; the hydraulic creeper consists of a hydraulic jack and a hydraulic clamping device. The steel truss unit can be transported to the preset installation position from the hoisting position on the roof girder, the advancing resistance of the sliding vehicle is reduced and the advancing stability of the sliding vehicle is ensured through the matching structure between the sliding vehicle and the track girder, and the propelling force requirement on the hydraulic crawler is reduced while the sliding transportation speed of the steel truss unit on the roof girder is improved; in addition, the steel roof truss sliding device has the advantages of low equipment cost, simplicity and convenience in installation and capability of being recycled.
Description
Technical Field
The invention relates to steel roof truss installation, in particular to a steel roof truss construction method.
Background
Nowadays more and more large-scale public buildings have adopted the large-span steel construction, like gymnasium, opera house and exhibition hall etc. because the dead weight of steel construction is little, intensity is high, and the shaping is fast, so its leap ability far superior to concrete structure, is prepared in the favor of engineering people. In these large-span buildings, the periphery is generally arranged as a steel frame, which has the advantage of highlighting the spatial sense of the building, and the upper roof truss is also often arranged as a steel truss structure, and the conventional way of constructing the steel roof truss is to divide the steel roof truss into a plurality of truss units, then to hoist the truss units to a designated position by mechanical equipment, and then to connect each truss unit by welding, finally to form a complete steel structure roof. However, due to the restriction of the construction site, the traditional construction method is difficult to hoist the steel truss outside, the construction risk is high in the mode of directly hoisting the truss unit to the designated position, and the design and installation requirements are difficult to meet.
At present, another commonly used construction method of the steel roof truss adopts a hydraulic device to slide a truss unit of the steel roof truss, and the sliding construction mode of the steel roof truss is basically not limited by a construction site, so that the construction cost can be effectively reduced, and the steel roof truss has remarkable economic benefit. At the present stage, the common mode of steel roof truss sliding construction is as follows: the sliding unit is directly erected on the steel track beam, then the sliding unit is pushed to a preset position through the hydraulic thruster, although the application range of the construction mode is wide, the sliding friction coefficient is large because the steel support of the truss unit is in direct contact with the steel track beam, the hydraulic thruster needs large driving force, the sliding speed is low, and the construction progress is greatly influenced. There is another steel roof truss construction method which adopts the roller to slide, the construction speed is faster than that of direct sliding, but because the existing self-made roller is complex in form and the whole set of equipment is high in cost, the construction method is less in actual engineering use.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the steel roof truss construction method is provided to solve the problem that sliding transportation speed and equipment cost are difficult to consider in the prior art.
The technical scheme adopted by the invention is as follows:
a steel roof truss construction method is characterized in that a plurality of steel truss units are assembled on the ground, then the steel truss units are hoisted to roof girders one by one and are transported to respective preset installation positions from hoisting positions through a sliding device to be installed, and finally the steel truss units are welded into a whole to form a steel roof truss; the method is particularly suitable for the condition that the roof girder is a large-span structure of a concrete or steel structure, and has a wide application range.
The steel truss unit is all transported through the steel roof truss sliding device that includes track roof beam, glide car and hydraulic pressure crawl device, and concrete step includes:
step one, finishing the installation of the track beam and the sliding vehicle, wherein:
the track beam extends from the hoisting position to a preset mounting position of each steel truss unit, the track beam is composed of a bottom plate, a clamping base, a connecting part and guide rails which are sequentially connected from bottom to top, the bottom plate is fixed on the roof beam, the track beam is provided with two guide rails with a spacing space reserved between the two guide rails, and two outer side gaps positioned on the outer side of the connecting part are respectively formed between the two guide rails and the clamping base;
the sliding trolley is provided with a frame, a bearing plate for bearing the steel truss unit is fixed on the top surface of the frame, a plurality of bearing rods are arranged at the bottom of the frame, wheels can be rotatably mounted at two ends of each bearing rod, an L-shaped limiting part is fixedly mounted at each end of each bearing rod, each wheel is composed of a wheel body and an axial limiting sheet with the size larger than that of the wheel body, the wheel body is located on the top surface of the guide rail, and the axial limiting sheets are attached to the inner side surface of the guide rail so as to limit the sliding trolley to move along the axial direction of the bearing rods and guide the sliding trolley to move only along the extension direction of the guide rail, namely the track beam; the longitudinal part of the L-shaped limiting part is fixedly connected with the bearing rod, and the transverse part of the L-shaped limiting part extends into the outer side gap and is attached to the bottom surface of the guide rail so as to limit the up-and-down movement of the sliding vehicle and prevent the sliding vehicle from jumping on the guide rail and overturning;
one or more than one rail beam which are parallel to each other can be arranged according to the difference of the size and the weight of the steel truss unit, and each rail beam can also be provided with one or more than one sliding vehicle so as to ensure the bearing capacity and the transportation stability of the steel truss unit; for example: in fig. 1, a mode of arranging two track beams and two sliding cars on each track beam is adopted, so that four support nodes of the steel truss unit at four corners are respectively supported on bearing plates of the four sliding cars.
The track beam and the sliding vehicle are preferably made of high-strength steel, so that the material cost is reduced, the strength requirements of compression resistance and shearing resistance are met, and the steel roof truss sliding device is recycled.
The guide rail is preferably chamfered to reduce wear of the guide rail during repeated turnaround.
Two positioning parts of the sliding vehicle, which are positioned at the hoisting position, are arranged on the track beam so as to temporarily fix the sliding vehicle at the hoisting position, namely the two positioning parts of the sliding vehicle are utilized to limit the sliding vehicle to move back and forth; installing a sliding vehicle positioning piece positioned at the preset installation position on the track beam, and measuring a preset stroke from a hoisting position to the preset installation position when the sliding vehicle runs along the track beam;
secondly, hoisting the steel truss unit assembled on the ground to the hoisting position by using a crane, and fixing the steel truss unit on a bearing plate of the sliding vehicle; preferably, the fixing mode is that high-strength bolts are used for connecting and fixing support nodes of the steel truss units and bolt holes of the bearing plate through bolts; and a wind cable can be adopted to further temporarily fix the steel truss unit at the hoisting position.
Step three, completing the installation of the hydraulic crawler, wherein: the hydraulic crawler is composed of a hydraulic jack and a hydraulic clamping device, the hydraulic clamping device is installed on a clamping base of the track beam and can clamp or loosen the clamping base under hydraulic control, the hydraulic jack is hinged between the hydraulic clamping device and the steel truss unit, and the hydraulic jack can stretch under hydraulic control. Wherein, the clamping base is used as a stress point of the hydraulic clamping device, and the height of the clamping base is slightly larger than the clamping part of the hydraulic clamping device, preferably more than 10 cm.
And the hydraulic control ports of the hydraulic jack and the hydraulic clamping device are respectively communicated with a hydraulic pump station on the ground through oil pipes; a travel sensor is mounted on the sliding vehicle, and the output end of the travel sensor and the control end of the hydraulic pump station are respectively and electrically connected with a main control cabinet on the ground;
fourthly, detaching the two sliding trolley positioning pieces positioned at the hoisting position from the track beam, loosening the wind-holding rope, controlling the hydraulic crawler to push the sliding trolley to advance by using the main control cabinet until the advancing stroke of the sliding trolley reaches the preset stroke detected by the stroke sensor, stopping the sliding trolley at the preset installation position by the sliding trolley positioning piece positioned at the preset installation position so as to realize accurate positioning of the stopping position of the sliding trolley, and temporarily fixing the steel truss unit at the preset installation position by using the wind-holding rope at the moment and controlling the hydraulic crawler to stop;
the mode of controlling the hydraulic crawler to push the sliding vehicle to advance is as follows: controlling the hydraulic jack to alternately and circularly extend and retract, controlling the hydraulic clamping device to alternately and circularly clamp and release, and controlling the hydraulic clamping device to clamp when controlling the hydraulic jack to extend so as to enable the extending hydraulic jack to push the sliding vehicle to advance; when the hydraulic jack is controlled to retract, the hydraulic clamping device is controlled to be released so that the retracted hydraulic jack pulls the hydraulic clamping device to advance;
step five, repeating the step one to the step four until each steel truss unit is transported to a preset installation position appointed by the steel truss unit;
and sixthly, unloading the steel truss units from the sliding vehicle by using a jack, and installing support nodes of the steel truss units in installation interfaces of the roof girders at corresponding preset installation positions after the steel roof truss sliding device is disassembled.
Therefore, the steel roof truss construction method of the invention utilizes the steel roof truss sliding device, can realize transporting the steel truss unit to the predetermined mounting position from the hoisting position on the roof girder, it through the cooperation structure between orbit roof beam and the slipping car, has reduced the forward resistance of the slipping car and guaranteed the forward stability of the slipping car, and promoted the anti-deformation and toppling ability of the slipping car, therefore, while improving the speed of transporting the steel truss unit in slipping on the roof girder, have reduced the propulsive force requirement to hydraulic crawler, and has promoted the bearing capacity to the steel truss unit; in addition, the steel roof truss sliding device has the advantages of low equipment cost, simplicity and convenience in installation and capability of being recycled.
In addition, the steel roof truss construction method can realize the transportation of a plurality of steel truss units from the hoisting position to the corresponding preset installation position on the roof girder under the control of the main control cabinet on the ground, and has the advantages of high construction speed and low difficulty.
Preferably: the bearing plate is welded on the top surface of the frame, and the bearing plate is provided with bolt holes for being connected with support node bolts of the steel truss units. The size of the bearing plate is consistent with or slightly smaller than that of the bottom surface of the support node of the steel truss unit, so that the reliability of bolt connection between the bearing plate and the support node is ensured; and, through selecting the loading board of suitable size, the car that slides can be applicable to the steel truss unit of different sizes.
Preferably: the wheels are integrally formed by high-strength steel, the two ends of the bearing rod are provided with wheel limiting parts, and the two ends of the bearing rod are respectively in threaded connection with wheel limiting nuts so as to limit each wheel between the corresponding wheel limiting part and the wheel limiting nut; the longitudinal part of the L-shaped limiting piece is sleeved at the end part of the bearing rod and locked between the corresponding wheel limiting nut and the limiting piece nut; the L-shaped limiting part is preferably made of perforated angle steel. Therefore, the sliding vehicle and the track beam can be conveniently mounted and dismounted, and the steel roof truss sliding device can be conveniently recycled.
Compared with the prior art, the invention has the following beneficial effects:
firstly, the steel roof truss construction method of the invention utilizes the steel roof truss sliding device, can realize the transportation of the steel truss unit from the hoisting position to the preset installation position on the roof girder, and through the matching structure between the sliding vehicle and the track girder, the advancing resistance of the sliding vehicle is reduced and the advancing stability of the sliding vehicle is ensured, thereby improving the sliding transportation speed of the steel truss unit on the roof girder and simultaneously reducing the propelling force requirement on the hydraulic crawler; in addition, the steel roof truss sliding device has the advantages of low equipment cost, simplicity and convenience in installation and capability of being recycled.
Secondly, the steel roof truss construction method can realize the transportation of a plurality of steel truss units from the hoisting position to the corresponding preset installation position on the roof girder under the control of the main control cabinet on the ground, and has the advantages of high construction speed and low difficulty.
Drawings
The invention is described in further detail below with reference to the following figures and specific examples:
FIG. 1 is a schematic structural view of a steel roof truss skidding apparatus of the present invention;
FIG. 2 is a schematic structural view of a track beam according to the present invention;
FIG. 3 is a schematic structural view of the glide vehicle of the present invention;
fig. 4 is a schematic sectional structural view of the steel roof truss sliding device of the invention.
Detailed Description
The present invention will be described in detail with reference to the following embodiments and the accompanying drawings to help those skilled in the art to better understand the inventive concept of the present invention, but the scope of the claims of the present invention is not limited to the following embodiments, and all other embodiments obtained without inventive efforts by those skilled in the art will fall within the scope of the present invention without departing from the inventive concept of the present invention.
As shown in fig. 1 to 4, the invention discloses a steel roof truss construction method, which comprises the steps of firstly assembling a plurality of steel truss units 1 on the ground, then hoisting the steel truss units 1 one by one onto a roof girder 2, transporting the steel truss units from hoisting positions to respectively appointed preset installation positions through a sliding device for installation, and finally welding the steel truss units 1 into a whole to form a steel roof truss; the roof girder is particularly suitable for the condition that the roof girder 2 is a large-span structure with a concrete or steel structure, and has a wide application range.
The steel truss unit 1 is transported through the steel roof truss sliding device comprising the track beam 3, the sliding vehicle 4 and the hydraulic crawler 5, and the concrete steps comprise:
step one, completing the installation of the track beam 3 and the sliding vehicle 4, wherein:
the track beam 3 extends from the hoisting position to a preset installation position of each steel truss unit 1, the track beam 3 is composed of a bottom plate 3-1, a clamping base 3-2, a connecting part 3-3 and a guide rail 3-4 which are sequentially connected from bottom to top, the bottom plate 3-1 is fixed on the roof beam 2, the track beam 3 is provided with two guide rails 3-4 with a spacing space 3a between the two guide rails 3-4, and two outer side gaps 3b positioned on the outer sides of the connecting part 3-3 are respectively formed between the two guide rails 3-4 and the clamping base 3-2;
the sliding vehicle 4 is provided with a vehicle frame 4-1, the top surface of the vehicle frame 4-1 is fixed with a bearing plate 4-2 for bearing the steel truss unit 1, the bottom of the frame 4-1 is provided with a plurality of bearing rods 4-3, both ends of the bearing rods 4-3 can be rotatably provided with wheels 4-4 and are fixedly provided with L-shaped limiting parts 4-5, the wheel 4-4 is composed of a wheel body 4-41 and an axial limiting sheet 4-42 with the size larger than that of the wheel body 4-41, the wheel body 4-41 is positioned on the top surface of the guide rail 3-4, the axial limiting sheet 4-42 is jointed with the inner side surface of the guide rail 3-4, so as to limit the axial movement of the sliding trolley 4 along the bearing rod 4-3 and guide the sliding trolley 4 to move only along the guide rail 3-4, namely the extension direction of the track beam 3; the longitudinal part 4-51 of the L-shaped limiting part 4-5 is fixedly connected with the bearing rod 4-3, and the transverse part 4-52 of the L-shaped limiting part 4-5 extends into the outer side gap 3b and is attached to the bottom surface of the guide rail 3-4 so as to limit the up-and-down movement of the sliding trolley 4 and prevent the sliding trolley 4 from jumping on the guide rail 3-4 to overturn;
one or more than one rail beam 3 which are parallel to each other can be arranged according to the difference of the size and the weight of the steel truss unit 1, and one or more than one sliding vehicle 4 can be arranged on each rail beam 3 so as to ensure the bearing capacity and the transportation stability of the steel truss unit 1; for example: in fig. 1, a mode of arranging two track beams 3 and arranging two sliding cars 4 on each track beam 3 is adopted, so that four support nodes 1-1 of a steel truss unit 1 positioned at four corners of the steel truss unit are respectively supported on bearing plates 4-2 of the four sliding cars 4.
The track beam 3 and the sliding vehicle 4 are preferably made of high-strength steel, so that the material cost is reduced, the strength requirements of compression resistance and shear resistance are met, and the steel roof truss sliding device is recycled.
The guide rails 3-4 are preferably chamfered to reduce wear during repeated turnaround.
Moreover, two positioning pieces 6 of the sliding vehicle positioned at the hoisting position are installed on the track beam 3 to temporarily fix the sliding vehicle 4 at the hoisting position, that is, the two positioning pieces 6 of the sliding vehicle are used for limiting the forward and backward movement of the sliding vehicle 4; installing a sliding vehicle positioning piece 6 positioned at the preset installation position on the track beam 3, and measuring a preset stroke from a hoisting position to the preset installation position when the sliding vehicle 4 runs along the track beam 3;
secondly, hoisting the steel truss unit 1 assembled on the ground to the hoisting position by using a crane, and fixing the steel truss unit 1 on a bearing plate 4-2 of the sliding vehicle 4; preferably, the fixing mode is that a high-strength bolt is used for connecting and fixing a support node 1-1 of the steel truss unit 1 and a bolt hole 4-2a of the bearing plate 4-2 through a bolt; and a wind cable can be adopted to further temporarily fix the steel truss unit 1 at the hoisting position.
Step three, completing the installation of the hydraulic crawler 5, wherein: the hydraulic crawler 5 is composed of a hydraulic jack 5-1 and a hydraulic clamping device 5-2, the hydraulic clamping device 5-2 is installed on a clamping base 3-2 of the track beam 3 and can clamp or release the clamping base 3-2 under hydraulic control, the hydraulic jack 5-1 is hinged between the hydraulic clamping device 5-2 and the steel truss unit 1, and the hydraulic jack 5-1 can stretch under hydraulic control. Wherein the clamping base 3-2 is used as a stress point of the hydraulic clamping device 5-2, and the height thereof is slightly larger than the clamping part of the hydraulic clamping device 5-2, and preferably exceeds 10 cm.
The hydraulic control ports of the hydraulic jack 5-1 and the hydraulic clamping device 5-2 are respectively communicated with a hydraulic pump station on the ground through oil pipes; a travel sensor is arranged on the sliding vehicle 4, and the output end of the travel sensor and the control end of the hydraulic pump station are respectively and electrically connected with a main control cabinet on the ground;
fourthly, detaching the two sliding trolley positioning pieces 6 positioned at the hoisting position from the track beam 3, loosening the wind-holding rope, controlling the hydraulic creeper 5 to push the sliding trolley 4 to advance by using the main control cabinet until the advance stroke of the sliding trolley 4 reaches the preset stroke detected by the stroke sensor, stopping the sliding trolley 4 at the preset installation position by being blocked by the sliding trolley positioning piece 6 positioned at the preset installation position so as to realize accurate positioning of the stop position of the sliding trolley 4, temporarily fixing the steel truss unit 1 at the preset installation position by using the wind-holding rope at the moment, and controlling the hydraulic creeper 5 to stop;
the mode of controlling the hydraulic crawler 5 to push the sliding vehicle 4 to advance is as follows: controlling the hydraulic jack 5-1 to alternately and circularly extend and retract, controlling the hydraulic clamping device 5-2 to alternately and circularly clamp and release, and controlling the hydraulic clamping device 5-2 to clamp when controlling the hydraulic jack 5-1 to extend so that the extended hydraulic jack 5-1 pushes the sliding vehicle 4 to advance; when the hydraulic jack 5-1 is controlled to retract, the hydraulic clamping device 5-2 is controlled to be released so that the retracted hydraulic jack 5-1 pulls the hydraulic clamping device 5-2 to advance;
step five, repeating the step one to the step four until each steel truss unit 1 is transported to a preset installation position appointed by the steel truss unit;
and sixthly, unloading the steel truss units 1 from the sliding trolley 4 by using a jack, and installing support nodes 1-1 of the steel truss units 1 in installation interfaces of the roof girders 2 at corresponding preset installation positions after the steel roof truss sliding device is detached.
Therefore, the steel roof truss construction method of the invention utilizes the steel roof truss sliding device, can realize transporting the steel truss unit 1 from the hoisting position to the predetermined mounting position on the roof girder 2, it has reduced the forward resistance of the sliding vehicle 4 and guaranteed the forward stability of the sliding vehicle 4 through the cooperation structure between sliding vehicle 4 and orbit beam 3, and promoted the resistance to deformation and toppling of the sliding vehicle 4, therefore, while improving the sliding transport speed of the steel truss unit 1 on the roof girder 2, has reduced the propulsive force requirement to the hydraulic crawler 5, and has promoted the bearing capacity to the steel truss unit 1; in addition, the steel roof truss sliding device has the advantages of low equipment cost, simplicity and convenience in installation and capability of being recycled.
In addition, the steel roof truss construction method can realize the transportation of a plurality of steel truss units 1 from the hoisting position to the corresponding preset installation position on the roof girder 2 under the control of the main control cabinet on the ground, and has the advantages of high construction speed and low difficulty.
The above is the basic embodiment of the present invention, and further optimization, improvement and limitation can be made on the basis of the basic embodiment:
preferably: the bearing plate 4-2 is welded on the top surface of the frame 4-1, and the bearing plate 4-2 is provided with a bolt hole 4-2a for connecting with a bolt of a support node 1-1 of the steel truss unit 1. The size of the bearing plate 4-2 is consistent with or slightly smaller than the size of the bottom surface of the support node 1-1 of the steel truss unit 1, so that the reliability of bolt connection between the bearing plate 4-2 and the support node 1-1 is ensured; and, by selecting a proper size of the bearing plate 4-2, the skid steer 4 can be adapted to different sizes of the steel truss units 1.
Preferably: the wheels 4-4 are integrally formed by high-strength steel, wheel limit parts are arranged at two ends of the bearing rod 4-3, and two ends of the bearing rod 4-3 are respectively in threaded connection with wheel limit nuts 4-6, so that each wheel 4-4 is limited between the corresponding wheel limit part and the wheel limit nut 4-6; the longitudinal part 4-51 of the L-shaped limiting piece 4-5 is sleeved on the end part of the bearing rod 4-3 and locked between the corresponding wheel limiting nut 4-6 and the limiting piece nut; wherein, the L-shaped limiting parts 4-5 are preferably angle steels with holes. Therefore, the sliding trolley 4 and the track beam 3 can be conveniently mounted and dismounted, and the steel roof truss sliding device can be conveniently recycled.
The present invention is not limited to the above embodiments, and various other equivalent modifications, substitutions or alterations can be made on the basis of the above description and the common general technical knowledge and conventional means in the field without departing from the basic technical idea of the invention.
Claims (3)
1. A steel roof truss construction method, through assembling a plurality of steel truss units (1) on the ground first, hoist and mount each steel truss unit (1) to roof beam (2) one by one and transport to the predetermined mounting position appointed separately from hoisting position and mount through the displacement device, weld each steel truss unit (1) into the integrated steel roof truss finally;
the method is characterized in that:
the steel truss unit (1) is all transported through the steel roof truss sliding device including track roof beam (3), skidding car (4) and hydraulic pressure crawl device (5), and concrete step includes:
step one, completing the installation of the track beam (3) and the sliding vehicle (4), wherein:
the track beam (3) extends from the hoisting position to the preset installation position of each steel truss unit (1), the track beam (3) is composed of a bottom plate (3-1), a clamping base (3-2), a connecting part (3-3) and guide rails (3-4) which are sequentially connected from bottom to top, the bottom plate (3-1) is fixed on the roof beam (2), the track beam (3) is provided with two guide rails (3-4) with a spacing space (3a) reserved between the two guide rails (3-4), and two outer side gaps (3b) located at the outer sides of the connecting part (3-3) are formed between the two guide rails (3-4) and the clamping base (3-2);
the sliding trolley (4) is provided with a trolley frame (4-1), a bearing plate (4-2) used for bearing the steel truss unit (1) is fixed on the top surface of the trolley frame (4-1), a plurality of bearing rods (4-3) are arranged at the bottom of the trolley frame (4-1), wheels (4-4) are rotatably arranged at two ends of each bearing rod (4-3) and are fixedly provided with L-shaped limiting pieces (4-5), each wheel (4-4) is composed of a wheel body (4-41) and an axial limiting piece (4-42) with the size larger than that of the wheel body (4-41), the wheel body (4-41) is located on the top surface of the guide rail (3-4), and the axial limiting pieces (4-42) are attached to the inner side surface of the guide rail (3-4); the longitudinal part (4-51) of the L-shaped limiting part (4-5) is fixedly connected with the bearing rod (4-3), and the transverse part (4-52) of the L-shaped limiting part (4-5) extends into the outer side gap (3b) and is attached to the bottom surface of the guide rail (3-4);
moreover, two sliding vehicle positioning pieces (6) positioned at the hoisting position are arranged on the track beam (3) so as to temporarily fix the sliding vehicle (4) at the hoisting position; a sliding vehicle positioning piece (6) located at the preset installation position is installed on the track beam (3), and the preset stroke from the hoisting position to the preset installation position when the sliding vehicle (4) runs along the track beam (3) is measured;
secondly, hoisting the steel truss unit (1) assembled on the ground to the hoisting position by using a crane, and fixing the steel truss unit (1) to a bearing plate (4-2) of the sliding vehicle (4);
step three, completing the installation of the hydraulic crawler (5), wherein: the hydraulic crawler (5) consists of a hydraulic jack (5-1) and a hydraulic clamping device (5-2), the hydraulic clamping device (5-2) is installed on a clamping base (3-2) of the track beam (3) and can clamp or release the clamping base (3-2) under hydraulic control, the hydraulic jack (5-1) is hinged between the hydraulic clamping device (5-2) and the steel truss unit (1), and the hydraulic jack (5-1) can be stretched under hydraulic control;
the hydraulic control ports of the hydraulic jack (5-1) and the hydraulic clamping device (5-2) are respectively communicated with a hydraulic pump station on the ground through oil pipes; a travel sensor is arranged on the sliding vehicle (4), and the output end of the travel sensor and the control end of the hydraulic pump station are respectively and electrically connected with a main control cabinet on the ground;
fourthly, detaching the two sliding trolley positioning pieces (6) positioned at the hoisting position from the track beam (3), controlling the hydraulic crawler (5) to push the sliding trolley (4) to advance by using the main control cabinet until the advance stroke of the sliding trolley (4) reaches the preset stroke detected by the stroke sensor, stopping the sliding trolley (4) at the preset installation position by being blocked by the sliding trolley positioning piece (6) positioned at the preset installation position, temporarily fixing the steel truss unit (1) at the preset installation position by using a wind-holding rope at the moment, and controlling the hydraulic crawler (5) to stop;
the mode of controlling the hydraulic crawler (5) to push the sliding vehicle (4) to advance is as follows: controlling the extension and retraction of the hydraulic jack (5-1) in an alternating cycle, controlling the clamping and releasing of the hydraulic clamping device (5-2) in an alternating cycle, controlling the clamping of the hydraulic clamping device (5-2) when controlling the extension of the hydraulic jack (5-1), and controlling the releasing of the hydraulic clamping device (5-2) when controlling the retraction of the hydraulic jack (5-1);
step five, repeating the step one to the step four until each steel truss unit (1) is transported to a specified preset installation position;
and sixthly, unloading the steel truss units (1) from the sliding vehicle (4) by using a jack, and installing support nodes (1-1) of the steel truss units (1) in installation interfaces of the roof girders (2) at corresponding preset installation positions after the steel roof truss sliding device is disassembled.
2. The steel roof truss construction method of claim 1, wherein: the bearing plate (4-2) is welded on the top surface of the frame (4-1), and the bearing plate (4-2) is provided with a bolt hole (4-2a) for being in bolt connection with a support node (1-1) of the steel truss unit (1).
3. A steel roof truss construction method as claimed in claim 1 or 2, wherein: the wheels (4-4) are integrally formed by high-strength steel, wheel limit parts are arranged at two ends of the bearing rod (4-3), and two ends of the bearing rod (4-3) are respectively in threaded connection with wheel limit nuts (4-6) so as to limit each wheel (4-4) between the corresponding wheel limit part and the wheel limit nut (4-6); the longitudinal part (4-51) of the L-shaped limiting piece (4-5) is sleeved on the end part of the bearing rod (4-3) and locked between the corresponding wheel limiting nut (4-6) and the limiting piece nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210432982.6A CN114961279A (en) | 2022-04-22 | 2022-04-22 | Steel roof truss construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210432982.6A CN114961279A (en) | 2022-04-22 | 2022-04-22 | Steel roof truss construction method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103806658A (en) * | 2012-11-14 | 2014-05-21 | 五冶集团上海有限公司 | Whole high-cleanliness electronic plant steel structure slippage and detachment method |
| US20150211205A1 (en) * | 2014-01-29 | 2015-07-30 | Guangzhou Jishi Construction Group Co., Ltd. | Construction system for subway station |
| CN108908290A (en) * | 2018-09-27 | 2018-11-30 | 共享智能铸造产业创新中心有限公司 | Track crane and truss robot or mechanical arm with the trolley |
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2022
- 2022-04-22 CN CN202210432982.6A patent/CN114961279A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103806658A (en) * | 2012-11-14 | 2014-05-21 | 五冶集团上海有限公司 | Whole high-cleanliness electronic plant steel structure slippage and detachment method |
| US20150211205A1 (en) * | 2014-01-29 | 2015-07-30 | Guangzhou Jishi Construction Group Co., Ltd. | Construction system for subway station |
| CN108908290A (en) * | 2018-09-27 | 2018-11-30 | 共享智能铸造产业创新中心有限公司 | Track crane and truss robot or mechanical arm with the trolley |
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