CN113123610B - Construction method of large-span roof steel truss structure - Google Patents
Construction method of large-span roof steel truss structure Download PDFInfo
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- CN113123610B CN113123610B CN202110460976.7A CN202110460976A CN113123610B CN 113123610 B CN113123610 B CN 113123610B CN 202110460976 A CN202110460976 A CN 202110460976A CN 113123610 B CN113123610 B CN 113123610B
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- E—FIXED CONSTRUCTIONS
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- 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
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Abstract
The invention relates to the field of building construction, and particularly discloses a construction method of a large-span roof steel truss structure, which comprises the following steps: 1) installing a jacking device; 2) jacking operation; 3) adjusting the jacking process; 4) adjusting the jacking height range; 5) and performing anti-falling measures; 6) and performing overturn prevention measures; 7) resetting the jacking device; the invention aims to solve the problems that the existing roof steel truss jacking construction method has small jacking height, poor efficiency and stability and the like, and cannot efficiently and safely finish jacking the ultrahigh roof steel truss.
Description
Technical Field
The invention relates to the technical field of building construction, and particularly discloses a construction method of a large-span roof steel truss structure.
Background
The steel truss can adapt to the distribution of bending moment and shearing force in the structure, self balance is realized due to the pulling and pressing internal force in the horizontal direction, and the whole structure does not generate horizontal thrust to the support, so the steel truss is widely applied to the field of buildings. The steel truss is mostly installed by adopting hoisting, when the steel truss is installed in a hoisting mode, a wide barrier-free space is needed, and meanwhile, the steel truss also needs to be subjected to traction control, so that the hoisting precision of the steel truss is ensured, and the steel truss can be prevented from colliding with a wall to be damaged; and the steel truss is installed in the jacking mode, a wide barrier-free space is not needed, the jacking installation precision is higher, and manual traction is not needed.
The jacking installation mode generally adopts the large-stroke hydraulic cylinder to carry out jacking operation, but the jacking height of the large-stroke hydraulic cylinder is smaller than the installation height of the hoisting mode, and the jacking operation facing the ultrahigh roof steel truss is often insufficient.
Disclosure of Invention
The invention aims to provide a construction method of a large-span roof steel truss structure, and aims to solve the problems that the existing roof steel truss jacking construction method is small in jacking height, poor in efficiency and stability and the like, and cannot efficiently and safely complete jacking of an ultrahigh roof steel truss.
In order to achieve the purpose, the basic scheme of the invention is as follows:
a construction method of a large-span roof steel truss structure comprises the following steps:
1) and installing a jacking device: placing the jacking device at the opposite installation position, and fixing the base on the ground; installing a steel truss in the installation groove of the support seat, and fixing the steel truss on the support seat;
2) and jacking operation: electrifying a second electromagnet on the lower support frame, and fixing the lower support frame and the support column by using the second electromagnet on the lower support frame; starting a hydraulic cylinder to lift the supporting seat and the steel truss together, and simultaneously pushing the upper supporting frame to move upwards by the hydraulic cylinder; when the stroke distance of the hydraulic cylinder reaches the maximum, a second electromagnet on the upper support frame is electrified, the upper support frame and the support column are fixed by the second electromagnet on the upper support frame, so that the output end of the hydraulic cylinder is fixed, then the second electromagnet on the lower support frame is powered off, and the cylinder body of the hydraulic cylinder is driven to move upwards through the automatic reset of the hydraulic cylinder, so that the lower support frame is driven to move upwards; after the cylinder body of the hydraulic cylinder is reset, the second electromagnet of the upper support frame is powered off, the second electromagnet of the lower support frame is powered on, the lower support frame is fixed again, and meanwhile, the hydraulic cylinder is started to jack the support base and the steel truss again; the operation is repeated in a circulating mode until the steel truss is jacked to the installation height, the hydraulic cylinder is closed, the second electromagnets on the upper supporting frame and the lower supporting frame are continuously electrified, and stable connection among the upper supporting frame, the lower supporting frame and the supporting columns is ensured;
3) adjusting the jacking process: the reset distance of the hydraulic cylinder body is adjusted to ensure that the jacking stroke of the hydraulic cylinder reaches the maximum when the steel truss is jacked to the installation height, the distance between the upper support frame and the lower support frame reaches the maximum at the moment, so that the support plate between the upper support frame and the lower support frame is unfolded to the vertical state, when the support plate is unfolded to the vertical state, the support plate pushes the connecting shaft to be contacted with the support column, the clamping groove on the connecting shaft is clamped on the support column, the connecting shaft and the support column are fixed by utilizing the first electromagnet, a support is formed between the upper support frame and the lower support frame through the support plate, the upper support frame is prevented from falling down, and meanwhile, the connection stability between the upper support frame and the support column is enhanced;
4) adjusting the jacking height range: if the height of the support column is not enough to reach the installation height of the steel truss, installing a standby threaded rod of the support column in a threaded hole at the top end of the existing support column, and lengthening the support column;
5) and the anti-falling measures are carried out: the upper support frame drives the circumferential connecting rod to move upwards in the upward movement process, the connecting rod and the overturn-preventing barrel generate relative displacement, so that the limiting block at the end part of the connecting rod is driven to slide upwards in the limiting groove, and the limiting block is contacted with the arc-shaped end surface of the limiting pin in the sliding process so as to extrude and push the limiting pin to slide into the sliding groove, so that the limiting block can pass through the limiting pin; after the limiting block passes through the limiting pin, the limiting pin is reset under the action of the reset spring and abuts against the bottom of the limiting block, so that the limiting block can only slide upwards, namely, the connecting rod is limited to only slide upwards, and the upper support frame is supported to prevent the upper support frame from suddenly falling;
6) and the overturn prevention measures are carried out: after the steel truss is jacked to the installation height, the anti-overturning barrel is rotated, the limiting block slides into the fixing groove from the limiting groove, the limiting block is limited by the fixing groove, the limiting block is prevented from moving continuously, the connecting rod is fixed, stable connection between the upper support frame and the base is formed, the upper support frame and the support column are prevented from overturning or loosening, the steel truss is prevented from overturning or shaking, and installation of the steel truss is influenced;
7) and resetting the jacking device: after the steel truss is installed, the fixed block in the slot is pulled out, the anti-overturning barrel is rotated in the same direction again, the limiting block slides into the slot from the fixed slot, at the moment, the limiting block can freely move up and down in the slot, namely, the connecting rod can freely move in the anti-overturning barrel, and therefore the support of the upper support frame is loosened; closing the second electromagnet on the upper support frame and the first electromagnet on the connecting shaft, starting the hydraulic cylinder to reset, keeping the cylinder body of the hydraulic cylinder still at the moment, and driving the upper support frame and the support seat to move downwards by the output end of the hydraulic cylinder; after the hydraulic cylinder is reset, a second electromagnet on the upper support frame is started, the second electromagnet on the lower support frame is closed, and the upper support frame is fixed and the lower support frame is loosened; starting the hydraulic cylinder again, wherein the output end of the hydraulic cylinder is fixed at the moment, and the hydraulic cylinder pushes the cylinder body of the hydraulic cylinder and the lower support frame to move downwards; when the hydraulic cylinder reaches the limit stroke, the second electromagnet on the lower support frame is started again, the second electromagnet on the upper support frame is closed, the hydraulic cylinder is driven to reset, and the circulation is repeated until the upper support frame and the lower support frame reset; after the upper supporting frame and the lower supporting frame are reset, the anti-overturning barrel is rotated reversely, so that the limiting block slides into the limiting groove through the fixing groove at the bottommost part and is abutted against the bottom end of the limiting pin at the bottommost part, and the resetting is completed.
Has the advantages that: the construction method is adopted to lift the steel truss structure, the lifting height is increased, and compared with the fixed lifting stroke of the existing lifting method, the construction method has higher lifting height and is suitable for lifting operation of the ultra-high steel truss; in addition, the method has anti-overturning and anti-falling measures, has stronger stability in the jacking process, and improves the construction efficiency.
A jacking device for a self-pulling high-steel truss comprises a base, wherein four support columns which are distributed in a rectangular shape are fixed on the base, the support columns are vertically arranged, and an upper support frame and a lower support frame which are rectangular are connected on the support columns in a sliding manner; the hydraulic cylinder is arranged on the lower support frame, the output end of the hydraulic cylinder is flush with the top end of the upper support frame, a support rod is fixed between the output end of the hydraulic cylinder and the upper support frame, and a support seat for placing a steel truss is fixed at the top end of the upper support frame; supporting plates are hinged to the side walls of the end parts of the opposite ends of the upper supporting frame and the lower supporting frame, connecting shafts are hinged between the opposite supporting plates, and a height difference exists between every two adjacent connecting shafts; clamping grooves clamped with the supporting columns are formed in two ends of the connecting shaft, and first electromagnets are arranged in the clamping grooves; and the lower support frame and the upper support frame are both provided with second electromagnets attached to the support columns.
Fixing the lower support frame and the support column by using a second electromagnet on the lower support frame, jacking the support seat and the steel truss together by using a hydraulic cylinder, and simultaneously pushing the upper support frame to move upwards by using the hydraulic cylinder; when the jacking distance of the hydraulic cylinder reaches the maximum, the upper support frame and the support column are fixed by using a second electromagnet on the upper support frame, so that the output end of the hydraulic cylinder is fixed, the second electromagnet of the lower support frame is powered off, and the cylinder body of the hydraulic cylinder is driven to move upwards through the automatic resetting of the hydraulic cylinder, so that the lower support frame is driven to move upwards; after the cylinder body of the hydraulic cylinder is reset, the second electromagnet of the upper supporting frame is powered off, the second electromagnet of the lower supporting frame is powered on, the lower supporting frame is fixed again, and meanwhile, the hydraulic cylinder is started to jack the supporting seat and the steel truss again until the steel truss is jacked to the mounting height.
Through the reset distance of adjustment pneumatic cylinder body, the jacking stroke of pneumatic cylinder reaches the biggest when guaranteeing the steel truss jacking to mounting height, the distance between upper bracket and the lower carriage at this moment reaches the biggest, thereby make backup pad between the two expand to vertical state, when the backup pad expands to vertical state, the backup pad promotes connecting axle and support column contact, connect epaxial draw-in groove block on the support column, it is fixed with the support column to utilize first electro-magnet, form the support to upper bracket and lower carriage through the backup pad, simultaneously also strengthened and the support column between the stability of being connected.
Has the advantages that: 1. the lower support frame, the upper support frame and the hydraulic cylinder are matched, so that the lower support frame and the upper support frame can alternately move upwards, the steel truss can continuously move upwards along the support column, the jacking stroke length of the hydraulic cylinder is increased to the length of the support column, and compared with the fixed jacking stroke of the existing jacking device, the device is higher in jacking height and applicable to jacking operation of the ultra-high steel truss;
2. compared with the installation mode of hoisting the steel truss, the device has the advantages that the required space is smaller, the environmental requirement is reduced, and the application range is enlarged; in addition, the steel truss does not need to be pulled manually in the jacking process, and the jacking precision of the steel truss is ensured while the manpower is greatly reduced.
Optionally, connecting cylinders are circumferentially distributed on the base around the lower support frame, the end parts of the connecting cylinders are rotatably connected with coaxial overturn-preventing cylinders, connecting rods are axially and slidably connected in the overturn-preventing cylinders, the connecting rods are hinged with the corresponding side walls of the upper support frame, and limiting blocks are uniformly fixed at the end parts of the connecting rods in the circumferential direction; a plurality of limiting grooves are formed in the overturn-preventing barrel along the axial direction of the overturn-preventing barrel, limiting blocks are connected in the limiting grooves in a sliding mode, a plurality of sliding grooves facing the connecting rods are uniformly formed in the limiting grooves, limiting pins are connected in the sliding grooves in a sliding mode, reset springs are fixed between the limiting pins and the sliding grooves, and the facing end faces of the limiting pins are arc-shaped; the side wall of the sliding chute is provided with a plurality of arc-shaped fixing grooves, the fixing grooves are concentric with the overturn-preventing barrel, and the bottom surfaces of the fixing grooves are parallel to the top surfaces of the corresponding limiting pins; a plurality of slots are formed in the overturning preventing barrel along the axis direction, penetrate through the end portions of the corresponding fixing slots, and are internally provided with fixing blocks.
The upper support frame drives the circumferential connecting rod to move upwards in the upward movement process, the connecting rod and the overturn-preventing barrel generate relative displacement, so that the limiting block at the end part of the connecting rod is driven to slide upwards in the limiting groove, and the limiting block is contacted with the arc-shaped end surface of the limiting pin in the sliding process so as to extrude and push the limiting pin to slide into the sliding groove, so that the limiting block can pass through the limiting pin; after the limiting block passes through the limiting pin, the limiting pin resets under the action of the reset spring and abuts against the bottom of the limiting block, so that the limiting block can only slide upwards, namely, the connecting rod is limited to only slide upwards, the upper support frame is supported, and the upper support frame is prevented from suddenly falling.
After the steel truss jacking to mounting height, rotate and prevent a section of thick bamboo that topples, the stopper is by spacing groove slip to the fixed slot in, utilizes the fixed slot to restrict the stopper, prevents that the stopper from continuing the motion to fix the connecting rod, form the stable connection between upper bracket and the base promptly, prevent that upper bracket and support column from toppling or becoming flexible, cause the steel truss to topple or rock, influence the installation of steel truss.
After the steel truss is installed, the fixing block in the slot is pulled out, the anti-overturning barrel is rotated in the same direction again, the limiting block slides into the slot from the fixing slot, and therefore the connecting rod is loosened, the connecting rod does not support the upper support frame any more, and the upper support frame can move; after the upper supporting frame and the lower supporting frame reset, the anti-overturning barrel rotates reversely, so that the limiting block slides into the limiting groove through the fixing groove at the bottommost part and abuts against the bottom end of the limiting pin at the bottommost part, resetting is completed, and the anti-overturning device is convenient to use next time.
Has the advantages that: in the scheme, the limiting groove, the limiting pin and the limiting block are matched, so that the connecting rod can only move upwards in the upward movement process of the upper supporting frame, the upper supporting frame at the moment is supported, the upper supporting frame is prevented from suddenly dropping, and the anti-dropping effect is achieved; after the steel truss is jacked to the required height, the anti-overturning barrel is rotated, the connecting rod is fixed by utilizing the matching between the fixed groove and the limiting block, the connecting barrel, the anti-overturning barrel and the connecting rod are utilized to support and fix the base and the upper support frame, the transverse force borne by the upper support frame is converted into the stretching force of the base while the anti-overturning barrel and the connecting rod are used for preventing the upper support frame and the steel truss from overturning, and the device is prevented from shaking or overturning to achieve the effect of preventing the upper support frame and the steel truss from overturning.
Optionally, the number of the second electromagnets on the lower support frame and the number of the second electromagnets on the upper support frame are four, the second electromagnets are annular, the second electromagnets are coaxial with the corresponding support columns, and a rubber layer is fixed on the inner wall of each second electromagnet and contacts with the support columns.
The contact area between the second electromagnet and the support column is increased by the annular second electromagnet, the adsorption force between the second electromagnet and the support column is increased, and the connection stability between the lower support frame and the support column and between the upper support frame and the support column are improved; and the rubber layer plays a role in increasing the friction force between the second electromagnet and the supporting column and preventing the second electromagnet from being adsorbed on the supporting column to slide relatively.
Optionally, a mounting plate is fixed to the bottom of the lower support frame, and the hydraulic cylinder is fixed to the center of the mounting plate.
The hydraulic cylinder forms fixed connection with the lower support frame through the mounting plate.
Optionally, a reinforcing rib is fixed between the inner wall of the lower support frame and the mounting plate.
The reinforcing ribs are used for increasing the connection between the mounting plate and the lower support frame, so that the mounting plate is prevented from falling.
Optionally, the supporting seat is provided with a horizontally arranged mounting groove, and two ends of the mounting groove penetrate through the supporting seat.
The steel truss is placed in the mounting groove and then fixed, so that the steel truss can be effectively prevented from being separated from the supporting seat in the jacking process
Optionally, a coaxial threaded hole is formed in the top end of the support column, and a threaded rod matched with the threaded hole is fixed to the bottom end of the support column.
The mounting height of steel truss is not reached to the height of support column, then installs the threaded rod of reserve support column in the threaded hole on current support column top, adds the extension to the support column, has increased the rise height of device, has further improved the jacking height of device to steel truss.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a front view of an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an upper support frame and a lower support frame according to an embodiment of the present invention;
FIG. 4 is a longitudinal cross-sectional view of a support post in an embodiment of the invention;
FIG. 5 is a schematic structural view of an anti-overturning barrel according to an embodiment of the present invention;
FIG. 6 is a longitudinal cross-sectional view of an anti-tipping cartridge in accordance with an embodiment of the present invention;
FIG. 7 is an enlarged schematic view at A of FIG. 6;
fig. 8 is a schematic structural diagram of a connecting rod in an embodiment of the invention.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the support structure comprises a base 1, a support column 2, a lower support frame 3, an upper support frame 4, a hydraulic cylinder 5, a support rod 6, a support seat 7, a support plate 8, a connecting shaft 9, a clamping groove 10, a first electromagnet 11, a second electromagnet 12, a connecting cylinder 13, an anti-overturning cylinder 14, a connecting rod 15, a limiting block 16, a limiting groove 17, a sliding groove 18, a limiting pin 19, a reset spring 20, a fixing groove 21, a slot 22, a fixing block 23, a mounting groove 24, a mounting plate 25, a reinforcing rib 26, a threaded hole 27, a threaded rod 28 and a steel truss 29.
Examples
As shown in fig. 1, 2, 3, 4, 5, 7 and 8:
a construction method of a large-span roof steel truss structure comprises the following steps:
1) and installing a jacking device: placing the jacking device at an opposite installation position, and fixing the base 1 on the ground; installing a steel truss 29 in the installation groove 24 of the support seat 7, and fixing the steel truss 29 on the support seat 7;
2) and jacking operation: electrifying a second electromagnet 12 on the lower support frame 3, and fixing the lower support frame 3 and the support column 2 by using the second electromagnet 12 on the lower support frame 3; starting the hydraulic cylinder 5 to lift the supporting seat 7 and the steel truss 29 together, and simultaneously pushing the upper supporting frame 4 to move upwards by the hydraulic cylinder 5; when the stroke distance of the hydraulic cylinder 5 reaches the maximum, the second electromagnet 12 on the upper support frame 4 is electrified, the upper support frame 4 and the support column 2 are fixed by using the second electromagnet 12 on the upper support frame 4, so that the output end of the hydraulic cylinder 5 is fixed, then the second electromagnet 12 of the lower support frame 3 is powered off, and the cylinder body of the hydraulic cylinder 5 is driven to move upwards through the automatic reset of the hydraulic cylinder 5, so that the lower support frame 3 is driven to move upwards; after the cylinder body of the hydraulic cylinder 5 is reset, the second electromagnet 12 of the upper support frame 4 is powered off, the second electromagnet 12 of the lower support frame 3 is powered on, the lower support frame 3 is fixed again, and meanwhile, the hydraulic cylinder 5 is started to jack the support base 7 and the steel truss 29 again; the operation is repeated in a circulating mode until the steel truss 29 is jacked to the installation height, the hydraulic cylinder 5 is closed, the second electromagnets 12 on the upper support frame 4 and the lower support frame 3 are kept electrified continuously, and stable connection among the upper support frame 4, the lower support frame 3 and the support column 2 is ensured;
3) adjusting the jacking process: by adjusting the reset distance of the cylinder body of the hydraulic cylinder 5, the jacking stroke of the hydraulic cylinder 5 is ensured to be maximum when the steel truss 29 is jacked to the installation height, the distance between the upper support frame 4 and the lower support frame 3 is maximum at the moment, so that the support plate 8 between the upper support frame and the lower support frame is unfolded to be in a vertical state, when the support plate 8 is unfolded to be in the vertical state, the support plate 8 pushes the connecting shaft 9 to be in contact with the support column 2, the clamping groove 10 on the connecting shaft 9 is clamped on the support column 2, the connecting shaft 9 and the support column 2 are fixed by using the first electromagnet 11, support is formed between the upper support frame 4 and the lower support frame 3 through the support plate 8, the upper support frame 4 is prevented from falling down, and meanwhile, the connection stability between the upper support frame and the support column 2 is also enhanced;
4) adjusting the jacking height range: adjusting the jacking height range: if the height of the support column 2 is not enough to reach the installation height of the steel truss 29, installing a standby threaded rod 28 of the support column 2 in a threaded hole 27 at the top end of the existing support column 2, and lengthening the support column 2;
5) and the anti-falling measures are carried out: the upper support frame 4 drives the connecting rod 15 to move upwards in the upward movement process, the connecting rod 15 and the overturn prevention barrel 14 are displaced relatively, so that the limiting block 16 at the end part of the connecting rod 15 is driven to slide upwards in the limiting groove 17, the limiting block 16 is contacted with the arc-shaped end surface of the limiting pin 19 in the sliding process, the limiting pin 19 is extruded and pushed to slide into the sliding groove 18, and the limiting block 16 can pass through the limiting pin 19; after the limiting block 16 passes through the limiting pin 19, the limiting pin 19 is reset under the action of the reset spring 20 and is abutted against the bottom of the limiting block 16, so that the limiting block 16 can only slide upwards, namely the connecting rod 15 is limited to only slide upwards to support the upper support frame 4, and the upper support frame 4 is prevented from suddenly dropping;
6) and the overturn prevention measures are carried out: after the steel truss 29 is jacked to the installation height, the anti-overturning barrel 14 is rotated, the limiting block 16 slides into the fixing groove 21 from the limiting groove 17, the limiting block 16 is limited by the fixing groove 21, the limiting block 16 is prevented from moving continuously, the connecting rod 15 is fixed, namely, the stable connection between the upper support frame 4 and the base 1 is formed, and the upper support frame 4 and the support column 2 are prevented from overturning or loosening to cause the overturning or shaking of the steel truss 29 and influence on the installation of the steel truss 29;
7) and resetting the jacking device: after the steel truss is installed, the fixed block in the slot is pulled out, the anti-overturning barrel is rotated in the same direction again, the limiting block slides into the slot from the fixed slot, at the moment, the limiting block can freely move up and down in the slot, namely, the connecting rod can freely move in the anti-overturning barrel, and therefore the support of the upper support frame is loosened; closing the second electromagnet on the upper support frame and the first electromagnet on the connecting shaft, starting the hydraulic cylinder to reset, keeping the cylinder body of the hydraulic cylinder still at the moment, and driving the upper support frame and the support seat to move downwards by the output end of the hydraulic cylinder; after the hydraulic cylinder is reset, a second electromagnet on the upper support frame is started, the second electromagnet on the lower support frame is closed, and the upper support frame is fixed and the lower support frame is loosened; starting the hydraulic cylinder again, wherein the output end of the hydraulic cylinder is fixed at the moment, and the hydraulic cylinder pushes the cylinder body of the hydraulic cylinder and the lower support frame to move downwards; when the hydraulic cylinder reaches the limit stroke, the second electromagnet on the lower support frame is started again, the second electromagnet on the upper support frame is closed, the hydraulic cylinder is driven to reset, and the circulation is repeated until the upper support frame and the lower support frame reset; after the upper supporting frame and the lower supporting frame are reset, the anti-overturning barrel is rotated reversely, so that the limiting block slides into the limiting groove through the fixing groove at the bottommost part and is abutted against the bottom end of the limiting pin at the bottommost part, and the resetting is completed.
The construction method is adopted to lift the steel truss structure, the lifting height is increased, and compared with the fixed lifting stroke of the existing lifting method, the construction method has higher lifting height and is suitable for lifting operation of the ultra-high steel truss; in addition, the method has anti-overturning and anti-falling measures, has stronger stability in the jacking process, and improves the construction efficiency.
A self-drawing high steel truss jacking device related in a large-span roof steel truss structure construction method comprises a base 1, four support columns 2 which are distributed in a rectangular shape are fixed on the base 1, the support columns 2 are vertically arranged, and an upper support frame 4 and a lower support frame 3 which are rectangular are connected on the support columns 2 in a sliding mode; a hydraulic cylinder 5 is arranged on the lower support frame 3, the output end of the hydraulic cylinder 5 is flush with the top end of the upper support frame 4, a support rod 6 is fixed between the output end of the hydraulic cylinder 5 and the upper support frame 4, and a support seat 7 for placing a steel truss 29 is fixed at the top end of the upper support frame 4; the end part side walls of the opposite ends of the upper support frame 4 and the lower support frame 3 are hinged with support plates 8, connecting shafts 9 are hinged between the opposite support plates 8, and a height difference exists between the adjacent connecting shafts 9; clamping grooves 10 clamped with the supporting columns 2 are formed in two ends of the connecting shaft 9, and first electromagnets 11 are arranged in the clamping grooves 10; and the lower support frame 3 and the upper support frame 4 are both provided with second electromagnets 12 attached to the support columns 2.
Electrifying a second electromagnet 12 on the lower support frame 3, and fixing the lower support frame 3 and the support column 2 by using the second electromagnet 12 on the lower support frame 3; starting the hydraulic cylinder 5 to lift the supporting seat 7 and the steel truss 29 together, and simultaneously pushing the upper supporting frame 4 to move upwards by the hydraulic cylinder 5; when the stroke distance of the hydraulic cylinder 5 reaches the maximum, the second electromagnet 12 on the upper support frame 4 is electrified, the upper support frame 4 and the support column 2 are fixed by using the second electromagnet 12 on the upper support frame 4, so that the output end of the hydraulic cylinder 5 is fixed, then the second electromagnet 12 of the lower support frame 3 is powered off, and the cylinder body of the hydraulic cylinder 5 is driven to move upwards through the automatic reset of the hydraulic cylinder 5, so that the lower support frame 3 is driven to move upwards; after the cylinder body of the hydraulic cylinder 5 is reset, the second electromagnet 12 of the upper support frame 4 is powered off, the second electromagnet 12 of the lower support frame 3 is powered on, the lower support frame 3 is fixed again, and meanwhile, the hydraulic cylinder 5 is started to jack the support base 7 and the steel truss 29 again; the operation is repeated in such a circulating way until the steel truss 29 is jacked to the installation height, the hydraulic cylinder 5 is closed, the second electromagnets 12 on the upper support frame 4 and the lower support frame 3 are kept electrified continuously, and the stable connection among the upper support frame 4, the lower support frame 3 and the support column 2 is ensured.
Reset distance through adjustment pneumatic cylinder 5 cylinder body, it reaches the biggest to ensure that the jacking stroke of pneumatic cylinder 5 reaches when steel truss 29 jacks to the mounting height, the distance between upper bracket 4 and lower carriage 3 at this moment reaches the biggest, thereby make backup pad 8 between the two expand to vertical state, backup pad 8 expands when vertical state, backup pad 8 promotes connecting axle 9 and support column 2 contact, draw-in groove 10 block on the connecting axle 9 is on support column 2, it is fixed with connecting axle 9 and support column 2 to utilize first electro-magnet 11, form the support to upper bracket 4 and lower carriage 3 through backup pad 8, the stability of being connected between 2 with the support column has also been strengthened simultaneously.
1. In the scheme, the lower support frame 3, the upper support frame 4 and the hydraulic cylinder 5 are matched, so that the lower support frame 3 and the upper support frame 4 can alternately move upwards, the steel truss 29 can continuously move upwards along the support column 2, and the jacking stroke length of the hydraulic cylinder 5 is increased to the length of the support column 2;
2. compared with the installation mode of hoisting the steel truss 29, the device has the advantages that the required space is smaller, the environmental requirement is reduced, and the application range is enlarged; in addition, the steel truss 29 does not need to be pulled manually in the jacking process, and the jacking precision of the steel truss 29 is ensured while the manpower is greatly reduced.
Optionally, connecting cylinders 13 are circumferentially distributed on the base 1 around the lower support frame 3, the end parts of the connecting cylinders 13 are rotatably connected with coaxial overturn-preventing cylinders 14, connecting rods 15 are axially and slidably connected in the overturn-preventing cylinders 14, the connecting rods 15 are hinged with the corresponding side walls of the upper support frame 4, and limiting blocks 16 are uniformly fixed at the end parts of the connecting rods 15 in the circumferential direction; a plurality of limiting grooves 17 are formed in the overturn-preventing barrel 14 along the axial direction of the overturn-preventing barrel, limiting blocks 16 are connected in the limiting grooves 17 in a sliding mode, a plurality of sliding grooves 18 facing the connecting rod 15 are uniformly formed in the limiting grooves 17, limiting pins 19 are connected in the sliding grooves 18 in a sliding mode, return springs 20 are fixed between the limiting pins 19 and the sliding grooves 18, and the end faces, facing the limiting pins 19, are arc-shaped; the side wall of the sliding chute 18 is provided with a plurality of arc-shaped fixing grooves 21, the circle centers of the fixing grooves 21 and the overturning-preventing cylinder 14 are parallel, and the bottom surfaces of the fixing grooves 21 are parallel to the top surfaces of the corresponding limiting pins 19; the overturn preventing barrel 14 is provided with a plurality of slots 22 along the axis direction, the slots 22 penetrate through the end parts of the corresponding fixing slots 21, and fixing blocks 23 are arranged in the slots 22.
The upper support frame 4 drives the connecting rod 15 to move upwards in the upward movement process, the connecting rod 15 and the overturn prevention barrel 14 are displaced relatively, so that the limiting block 16 at the end part of the connecting rod 15 is driven to slide upwards in the limiting groove 17, the limiting block 16 is contacted with the arc-shaped end surface of the limiting pin 19 in the sliding process, the limiting pin 19 is extruded and pushed to slide into the sliding groove 18, and the limiting block 16 can pass through the limiting pin 19; after the limiting block 16 passes through the limiting pin 19, the limiting pin 19 is reset under the action of the reset spring 20 and abuts against the bottom of the limiting block 16, so that the limiting block 16 can only slide upwards, namely, the connecting rod 15 is limited to only slide upwards, and the upper support frame 4 is supported to prevent the upper support frame 4 from suddenly falling.
After the steel truss 29 is jacked to the mounting height, the overturn preventing barrel 14 is rotated, the limiting block 16 slides into the fixing groove 21 through the limiting groove 17, the limiting block 16 is limited by the fixing groove 21, the limiting block 16 is prevented from continuing to move, the connecting rod 15 is fixed, stable connection between the upper support frame 4 and the base 1 is formed, the upper support frame 4 and the support column 2 are prevented from overturning or loosening, the steel truss 29 is prevented from overturning or shaking, and the mounting of the steel truss 29 is influenced.
After the steel truss 29 is installed, the fixing blocks 23 in the slots 22 are pulled out, the anti-overturning barrel 14 is rotated in the same direction again, the limiting blocks 16 slide into the slots 22 from the fixing slots 21, and therefore the connecting rods 15 are loosened, the connecting rods 15 do not support the upper support frame 4 any more, and the upper support frame 4 can move; after the upper support frame 4 and the lower support frame 3 are reset, the anti-overturning barrel 14 is rotated reversely, so that the limiting block 16 slides into the limiting groove 17 through the fixing groove 21 at the bottommost part and abuts against the bottom end of the limiting pin 19 at the bottommost part, the resetting is completed, and the use at the next time is facilitated.
In the scheme, the connecting rod 15 can only move upwards in the upward movement process of the upper support frame 4 through the matching of the limiting groove 17, the limiting pin 19 and the limiting block 16, so that the upper support frame 4 at the moment is supported, the upper support frame 4 is prevented from suddenly dropping, and the anti-falling effect is achieved; after the steel truss 29 is jacked to a required height, the anti-overturning barrel 14 is rotated, the connecting rod 15 is fixed by the aid of cooperation between the fixing groove 21 and the limiting block 16, the connecting barrel 13, the anti-overturning barrel 14 and the connecting rod 15 are used for supporting and fixing the base 1 and the upper support frame 4, transverse force borne by the upper support frame 4 is converted into tensile force for the base 1 while anti-falling is achieved, the device is prevented from shaking or overturning, and the effect of preventing the upper support frame 4 and the steel truss 29 from overturning is achieved.
Optionally, the number of the second electromagnets 12 on the lower support frame 3 and the number of the second electromagnets 12 on the upper support frame 4 are four, the second electromagnets 12 are annular, the second electromagnets 12 are coaxial with the corresponding support columns 2, and a rubber layer fixed on the inner wall of each second electromagnet 12 is in contact with the support column 2.
The contact area between the second electromagnet 12 and the support column 2 is increased by the annular second electromagnet 12, the adsorption force between the second electromagnet 12 and the support column 2 is increased, and the connection stability between the lower support frame 3, the upper support frame 4 and the support column 2 is improved; the rubber layer increases the friction between the second electromagnet 12 and the support column 2, and prevents the second electromagnet 12 from being adsorbed on the support column 2 to slide relatively.
Optionally, a mounting plate 25 is fixed at the bottom of the lower support frame 3, and the hydraulic cylinder 5 is fixed at the center of the mounting plate 25.
The hydraulic cylinder 5 is fixedly connected with the lower support frame 3 through a mounting plate 25.
Optionally, a reinforcing rib 26 is fixed between the inner wall of the lower support frame 3 and the mounting plate 25.
The connection between the mounting plate 25 and the lower support frame 3 is increased by the reinforcing ribs 26, preventing the mounting plate 25 from falling.
Optionally, the support seat 7 is provided with a horizontally disposed installation groove 24, and two ends of the installation groove 24 penetrate through the support seat 7.
The steel truss 29 is placed in the mounting groove 24 and then fixed, so that the steel truss 29 can be effectively prevented from being separated from the supporting seat 7 in the jacking process
Optionally, the top end of the supporting column 2 is provided with a coaxial threaded hole 27, and the bottom end of the supporting column 2 is fixed with a threaded rod 28 matched with the threaded hole 27.
The height of the supporting column 2 is not enough to reach the installation height of the steel truss 29, the standby threaded rod 28 of the supporting column 2 is installed in the threaded hole 27 in the top end of the existing supporting column 2, the supporting column 2 is lengthened, the lifting height of the device is increased, and the jacking height of the device to the steel truss 29 is further improved.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the present invention.
Claims (8)
1. A construction method of a large-span roof steel truss structure is characterized by comprising the following steps: the method comprises the following steps:
1) and installing a jacking device: placing the jacking device at the opposite installation position, and fixing the base on the ground; installing a steel truss in the installation groove of the support seat, and fixing the steel truss on the support seat;
2) and jacking operation: electrifying a second electromagnet on the lower support frame, and fixing the lower support frame and the support column by using the second electromagnet on the lower support frame; starting a hydraulic cylinder to lift the supporting seat and the steel truss together, and simultaneously pushing the upper supporting frame to move upwards by the hydraulic cylinder; when the stroke distance of the hydraulic cylinder reaches the maximum, a second electromagnet on the upper support frame is electrified, the upper support frame and the support column are fixed by the second electromagnet on the upper support frame, so that the output end of the hydraulic cylinder is fixed, then the second electromagnet on the lower support frame is powered off, and the cylinder body of the hydraulic cylinder is driven to move upwards through the automatic reset of the hydraulic cylinder, so that the lower support frame is driven to move upwards; after the cylinder body of the hydraulic cylinder is reset, the second electromagnet of the upper support frame is powered off, the second electromagnet of the lower support frame is powered on, the lower support frame is fixed again, and meanwhile, the hydraulic cylinder is started to jack the support base and the steel truss again; the operation is repeated in a circulating mode until the steel truss is jacked to the installation height, the hydraulic cylinder is closed, the second electromagnets on the upper supporting frame and the lower supporting frame are continuously electrified, and stable connection among the upper supporting frame, the lower supporting frame and the supporting columns is ensured;
3) adjusting the jacking process: the reset distance of the hydraulic cylinder body is adjusted to ensure that the jacking stroke of the hydraulic cylinder reaches the maximum when the steel truss is jacked to the installation height, the distance between the upper support frame and the lower support frame reaches the maximum at the moment, so that the support plate between the upper support frame and the lower support frame is unfolded to the vertical state, when the support plate is unfolded to the vertical state, the support plate pushes the connecting shaft to be contacted with the support column, the clamping groove on the connecting shaft is clamped on the support column, the connecting shaft and the support column are fixed by utilizing the first electromagnet, a support is formed between the upper support frame and the lower support frame through the support plate, the upper support frame is prevented from falling down, and meanwhile, the connection stability between the upper support frame and the support column is enhanced;
4) adjusting the jacking height range: if the height of the support column is not enough to reach the installation height of the steel truss, installing a standby threaded rod of the support column in a threaded hole at the top end of the existing support column, and lengthening the support column;
5) and the anti-falling measures are carried out: the upper support frame drives the circumferential connecting rod to move upwards in the upward movement process, the connecting rod and the overturn-preventing barrel generate relative displacement, so that the limiting block at the end part of the connecting rod is driven to slide upwards in the limiting groove, and the limiting block is contacted with the arc-shaped end surface of the limiting pin in the sliding process so as to extrude and push the limiting pin to slide into the sliding groove, so that the limiting block can pass through the limiting pin; after the limiting block passes through the limiting pin, the limiting pin is reset under the action of the reset spring and abuts against the bottom of the limiting block, so that the limiting block can only slide upwards, namely, the connecting rod is limited to only slide upwards, and the upper support frame is supported to prevent the upper support frame from suddenly falling;
6) and the overturn prevention measures are carried out: after the steel truss is jacked to the installation height, the anti-overturning barrel is rotated, the limiting block slides into the fixing groove from the limiting groove, the limiting block is limited by the fixing groove, the limiting block is prevented from moving continuously, the connecting rod is fixed, stable connection between the upper support frame and the base is formed, the upper support frame and the support column are prevented from overturning or loosening, the steel truss is prevented from overturning or shaking, and installation of the steel truss is influenced;
7) and resetting the jacking device: after the steel truss is installed, the fixed block in the slot is pulled out, the anti-overturning barrel is rotated in the same direction again, the limiting block slides into the slot from the fixed slot, at the moment, the limiting block can freely move up and down in the slot, namely, the connecting rod can freely move in the anti-overturning barrel, and therefore the support of the upper support frame is loosened; closing the second electromagnet on the upper support frame and the first electromagnet on the connecting shaft, starting the hydraulic cylinder to reset, keeping the cylinder body of the hydraulic cylinder still at the moment, and driving the upper support frame and the support seat to move downwards by the output end of the hydraulic cylinder; after the hydraulic cylinder is reset, a second electromagnet on the upper support frame is started, the second electromagnet on the lower support frame is closed, and the upper support frame is fixed and the lower support frame is loosened; starting the hydraulic cylinder again, wherein the output end of the hydraulic cylinder is fixed at the moment, and the hydraulic cylinder pushes the cylinder body of the hydraulic cylinder and the lower support frame to move downwards; when the hydraulic cylinder reaches the limit stroke, the second electromagnet on the lower support frame is started again, the second electromagnet on the upper support frame is closed, the hydraulic cylinder is driven to reset, and the circulation is repeated until the upper support frame and the lower support frame reset; after the upper supporting frame and the lower supporting frame are reset, the anti-overturning barrel is rotated reversely, so that the limiting block slides into the limiting groove through the fixing groove at the bottommost part and is abutted against the bottom end of the limiting pin at the bottommost part, and the resetting is completed.
2. The self-pulling high-steel truss jacking device involved in the construction method of the long-span roof steel truss structure according to claim 1, is characterized in that: the device comprises a base, wherein four support columns which are distributed in a rectangular shape are fixed on the base, the support columns are vertically arranged, and an upper support frame and a lower support frame which are rectangular are connected on the support columns in a sliding manner; the hydraulic cylinder is arranged on the lower support frame, the output end of the hydraulic cylinder is flush with the top end of the upper support frame, a support rod is fixed between the output end of the hydraulic cylinder and the upper support frame, and a support seat for placing a steel truss is fixed at the top end of the upper support frame; supporting plates are hinged to the side walls of the end parts of the opposite ends of the upper supporting frame and the lower supporting frame, connecting shafts are hinged between the opposite supporting plates, and a height difference exists between every two adjacent connecting shafts; clamping grooves clamped with the supporting columns are formed in two ends of the connecting shaft, and first electromagnets are arranged in the clamping grooves; and the lower support frame and the upper support frame are both provided with second electromagnets attached to the support columns.
3. The self-drawing high steel truss jacking device of claim 2, wherein: connecting cylinders are circumferentially distributed on the base around the lower support frame, the end parts of the connecting cylinders are rotatably connected with coaxial overturn-preventing cylinders, connecting rods are axially and slidably connected in the overturn-preventing cylinders, the connecting rods are hinged with the corresponding side walls of the upper support frame, and limiting blocks are uniformly fixed at the end parts of the connecting rods in the circumferential direction; a plurality of limiting grooves are formed in the overturn-preventing barrel along the axial direction of the overturn-preventing barrel, limiting blocks are connected in the limiting grooves in a sliding mode, a plurality of sliding grooves facing the connecting rods are uniformly formed in the limiting grooves, limiting pins are connected in the sliding grooves in a sliding mode, reset springs are fixed between the limiting pins and the sliding grooves, and the facing end faces of the limiting pins are arc-shaped; the side wall of the sliding chute is provided with a plurality of arc-shaped fixing grooves, the fixing grooves are concentric with the overturn-preventing barrel, and the bottom surfaces of the fixing grooves are parallel to the top surfaces of the corresponding limiting pins; a plurality of slots are formed in the overturning preventing barrel along the axis direction, penetrate through the end portions of the corresponding fixing slots, and are internally provided with fixing blocks.
4. The self-drawing high steel truss jacking device of claim 3, wherein: the lower supporting frame and the upper supporting frame are provided with four second electromagnets, the second electromagnets are annular and coaxial with the corresponding supporting columns, and the inner walls of the second electromagnets are fixedly provided with rubber layers which are in contact with the supporting columns.
5. The self-drawing high steel truss jacking device of claim 4, wherein: the bottom of the lower support frame is fixedly provided with a mounting plate, and the hydraulic cylinder is fixed at the center of the mounting plate.
6. The self-drawing high steel truss jacking device of claim 5, wherein: and reinforcing ribs are fixed between the inner wall of the lower support frame and the mounting plate.
7. The self-drawing high steel truss jacking device of claim 6, wherein: the supporting seat is provided with a mounting groove which is horizontally arranged, and two ends of the mounting groove penetrate through the supporting seat.
8. The self-drawing high steel truss jacking device of claim 7, wherein: the top of support column is seted up the screw hole of coaxial line, and the bottom mounting of support column has the threaded rod with screw hole complex.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4261967B2 (en) * | 2003-04-18 | 2009-05-13 | アイシン・エィ・ダブリュ株式会社 | Vehicle navigation apparatus, program for the apparatus, and recording medium |
| CN101858146A (en) * | 2010-04-08 | 2010-10-13 | 上海汽车改装厂有限公司 | Self-climbing lifting mechanism and using method thereof |
| CN109736445A (en) * | 2019-02-28 | 2019-05-10 | 北京市第三建筑工程有限公司 | Multi-storey steel structure rack mounting bracket automatic lifting connects circulation jacking apparatus |
| CN110005210A (en) * | 2019-04-16 | 2019-07-12 | 中国建筑第八工程局有限公司 | The mounting device and its construction method of steel truss |
| CN111058618A (en) * | 2019-12-27 | 2020-04-24 | 上海建工集团股份有限公司 | Combined type telescopic sleeve jacking device and method thereof |
| CN212715364U (en) * | 2020-06-30 | 2021-03-16 | 上海建工四建集团有限公司 | Emergency disposal equipment for integrally lifting air corridor among super-high group of towers |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2678096B2 (en) * | 1991-02-15 | 1997-11-17 | 宮地建設工業株式会社 | Large space structure lifting device |
| CN110206155B (en) * | 2019-05-31 | 2021-06-15 | 浙江精工钢结构集团有限公司 | Bottom-added hydraulic jacking system and construction method |
-
2021
- 2021-04-27 CN CN202110460976.7A patent/CN113123610B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4261967B2 (en) * | 2003-04-18 | 2009-05-13 | アイシン・エィ・ダブリュ株式会社 | Vehicle navigation apparatus, program for the apparatus, and recording medium |
| CN101858146A (en) * | 2010-04-08 | 2010-10-13 | 上海汽车改装厂有限公司 | Self-climbing lifting mechanism and using method thereof |
| CN109736445A (en) * | 2019-02-28 | 2019-05-10 | 北京市第三建筑工程有限公司 | Multi-storey steel structure rack mounting bracket automatic lifting connects circulation jacking apparatus |
| CN110005210A (en) * | 2019-04-16 | 2019-07-12 | 中国建筑第八工程局有限公司 | The mounting device and its construction method of steel truss |
| CN111058618A (en) * | 2019-12-27 | 2020-04-24 | 上海建工集团股份有限公司 | Combined type telescopic sleeve jacking device and method thereof |
| CN212715364U (en) * | 2020-06-30 | 2021-03-16 | 上海建工四建集团有限公司 | Emergency disposal equipment for integrally lifting air corridor among super-high group of towers |
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