CN111809885A - Large-span steel truss hydraulic jacking system and construction method thereof - Google Patents
Large-span steel truss hydraulic jacking system and construction method thereof Download PDFInfo
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- CN111809885A CN111809885A CN202010614278.3A CN202010614278A CN111809885A CN 111809885 A CN111809885 A CN 111809885A CN 202010614278 A CN202010614278 A CN 202010614278A CN 111809885 A CN111809885 A CN 111809885A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 48
- 239000010959 steel Substances 0.000 title claims abstract description 48
- 238000010276 construction Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 15
- 230000008569 process Effects 0.000 claims abstract description 11
- 239000003921 oil Substances 0.000 claims description 19
- 238000003466 welding Methods 0.000 claims description 8
- 239000010720 hydraulic oil Substances 0.000 claims description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 230000001360 synchronised effect Effects 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 3
- 230000002265 prevention Effects 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 238000004064 recycling Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
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Abstract
A hydraulic jacking system for a large-span steel truss and a construction method thereof comprise the following steps: the jacking system, the periphery of jacking system is equipped with four interim fulcrums, and interim fulcrum is located on lower floor's concrete column, is equipped with reinforceing system between fulcrum and the fulcrum, and interim fulcrum forms square structure, and the periphery of interim fulcrum is equipped with the truss bracket, and the truss bracket reciprocates along interim fulcrum. This patent has improved the construction environment, has improved construction factor of safety, has received better security benefit. The construction progress is accelerated, the working efficiency is improved, the construction process completely solves the difficulty of limited on-site integral hoisting, and the engineering quality is ensured.
Description
Technical Field
The invention belongs to the technical field of buildings, and relates to a hydraulic jacking system for a large-span steel truss.
Background
Along with the progress of science and technology and the rapid development of steel structure industry, relative to the characteristics such as civil engineering steel structure self span is big, the dead weight is light, the construction is swift, this kind of structural style of steel construction obtains more extensive application like in the engineering: racks, trusses, bridges, and the like. Because the steel structure span is large, the size is large, one single project needs to be completed in sections or in bulk or be completed in an integral hoisting mode, even all construction machines cannot be applied due to the influence of the environment, so that the construction period is prolonged, the safety coefficient of overhead operation is reduced, the cost is increased, the safety coefficient is reduced, the construction period is prolonged, and the like.
Disclosure of Invention
The invention aims to provide a hydraulic jacking system for a large-span steel truss, which aims to solve the problems in the prior art.
The utility model provides a large-span steel truss hydraulic jacking system, includes: a jacking device is arranged on the base plate,
h-shaped steel beams are arranged on truss brackets of the plurality of jacking devices, positioning guide rails are arranged at the tail ends of the adjacent H-shaped steel beams, and the guide rails slide along the rails on the concrete columns; a reinforcing strip is arranged on one side of the positioning guide rail and close to the jacking device;
four temporary struts are arranged on the periphery of the jacking device, the temporary struts are located on the lower concrete column, reinforcing members are arranged between the first strut and the second strut, reinforcing members are arranged between the third strut and the fourth strut, anti-falling strips are arranged on the outer side of the first strut and the outer side of the third strut, anti-falling strips are arranged on the outer side of the second strut and the outer side of the fourth strut, the four struts form a square structure, truss brackets are nested on the temporary struts, and the truss brackets move up and down along the temporary struts;
preferably, the jacking structure further comprises a hydraulic ram, flange plates are arranged at the bottom and the top of the hydraulic ram, and a truss bracket is arranged on the hydraulic ram.
Preferably, the hydraulic ram adopts 4 100T double-acting flange self-locking hydraulic oil cylinders, oil is supplied by an oil pump, and the performance of the hydraulic ram is matched with that of the hydraulic ram.
Preferably, the temporary support columns are arranged on the outer sides of the truss brackets and are provided with fixed upper brackets below the truss brackets.
A construction method of a large-span steel truss hydraulic jacking system comprises the following steps:
paying off, positioning → installing steel trusses at two ends → laying a jig frame → assembling and welding the trusses to be jacked on site → checking → installing jacking equipment, debugging → jacking the trusses → welding two ends of the trusses → checking → unloading.
Specifically, the method comprises the following steps:
a: paying-off and positioning
The truss is positioned on the floor in a paying-off mode before being assembled, the position of the truss before jacking is ensured to be consistent with the orthographic projection position of the truss after being installed, and therefore the truss after jacking is convenient to be consistent with the original position. Meanwhile, ink lines are flicked on the parapet wall surface according to the arching requirement, so that the arching degree of the truss is controlled.
B: splicing the steel trusses at two ends to the designed elevation
C: laying of moulding bed
The jig frame is made of H-shaped steel, and the stability of the jig frame is ensured by arranging the inclined struts;
d: assembling the steel truss at the position needing to be jacked;
after the lower chord of the truss is assembled, in order to ensure the integral stability of the truss, the lower chord of the truss part can be firstly assembled with the lower chord, and the rest trusses can be assembled after the truss is assembled.
E: steel truss jacking
1. According to the related technical parameters of the steel truss, 4 100T hydraulic jacks are planned to be adopted for synchronous jacking; 4 hydraulic rams are a set, are supplied oil by an oil pump, its performance should be supporting with the hydraulic ram. Hydraulic elements such as a double-acting flange self-locking hydraulic oil cylinder, an ultrahigh pressure electric pump (with pressure maintaining), a distribution valve, a high-pressure oil pipe and the like are combined together to form a pump station.
2. Flanges are arranged at the bottom and the top of the hydraulic jack and are connected and fixed with the temporary support and the main truss through the flanges so as to ensure that displacement does not occur in the jacking process; determining the height of each jacking step according to the stroke height of the hydraulic jack; inserting the steel support on the temporary support and at the elevation position of the bottom of the truss after the hydraulic jack is jacked to a set height, and jacking and unloading the hydraulic jack; the hydraulic jack supports the base to move upwards; and continuously repeating the processes until the truss reaches the design height.
The positive effects of the invention are as follows:
this patent has improved the construction environment, has improved construction factor of safety, has received better security benefit. The construction progress is accelerated, the working efficiency is improved, the construction process completely solves the difficulty of limited on-site integral hoisting, and the engineering quality is ensured.
Drawings
The invention is further described below with reference to the accompanying drawings:
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the hydraulic ram support of the present invention.
In the drawings:
the device comprises a first support 1, a connecting piece 2, a hydraulic ram 3, a fixed upper bracket 4, a truss support 5, a second support 6, a fourth support 7, an anti-falling strip 8, a concrete column 9, a track 10, a positioning guide rail 11 and a reinforcing strip 12.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Please refer to fig. 1-2. It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
The utility model provides a large-span steel truss hydraulic jacking system, includes: a jacking device is arranged on the base plate,
h-shaped steel beams are arranged on truss brackets of the plurality of jacking devices, positioning guide rails are arranged at the tail ends of the adjacent H-shaped steel beams, and the guide rails slide along the rails on the concrete columns; a reinforcing strip is arranged on one side of the positioning guide rail and close to the jacking device;
the periphery of jacking device is equipped with four interim fulcrums, and interim fulcrum is located on lower floor's concrete column, is equipped with reinforceing system between fulcrum and the fulcrum, and interim fulcrum forms square structure, and the periphery of interim fulcrum is equipped with the truss bracket, and the truss bracket reciprocates along interim fulcrum.
Preferably, the jacking structure further comprises a hydraulic ram, flange plates are arranged at the bottom and the top of the hydraulic ram, and a truss bracket is arranged on the hydraulic ram.
Preferably, the hydraulic ram adopts 4 100T double-acting flange self-locking hydraulic oil cylinders, oil is supplied by an oil pump, and the performance of the hydraulic ram is matched with that of the hydraulic ram. Hydraulic elements such as a double-acting flange self-locking hydraulic oil cylinder, an ultrahigh pressure electric pump (with pressure maintaining), a distribution valve, a high-pressure oil pipe and the like are combined together to form a pump station.
The system adopts 4 100T double-acting flange self-locking hydraulic cylinders, is supplied with oil by an oil pump, and has the performance matched with a hydraulic jack. Hydraulic elements such as a double-acting flange self-locking hydraulic oil cylinder, an ultrahigh pressure electric pump (with pressure maintaining), a distribution valve, a high-pressure oil pipe and the like are combined together to form a pump station.
Installing corresponding temporary supports at the selected four pivot points, enabling the gravity centers of the temporary supports to fall on the lower-layer concrete columns, and connecting the temporary supports with beams through inclined struts to ensure the stability of the supports; the temporary support is used for supporting the hydraulic jack and supporting the truss when the hydraulic jack needs to be unloaded. The bottom and the top of the hydraulic jack are provided with flanges which are fixedly connected so as to ensure that the hydraulic jack does not displace in the jacking process; determining the height of each jacking step according to the stroke height of the hydraulic jack; when the hydraulic jack is jacked to a set height (500 mm), a truss bracket is installed, and the hydraulic jack is jacked back to unload; the hydraulic jack bracket moves upwards; and continuously repeating the processes until the truss reaches the design height. And after the truss is jacked to the designed height, butt-joint assembly welding is carried out on the truss and the installed truss part. And after the welding and flaw detection of the steel truss are finished, the whole unloading can be carried out, and the synchronous unloading is carried out during the unloading. And unloading, unified command, unified action and unified requirement of each supporting point at the same time. And finally, dismantling construction accessories such as a hydraulic jack and the like, and submitting the construction accessories to subsequent procedures for construction.
A construction method of a large-span steel truss hydraulic jacking system comprises the following steps:
paying off, positioning → installing steel trusses at two ends → laying a jig frame → assembling and welding the trusses to be jacked on site → checking → installing jacking equipment, debugging → jacking the trusses → welding two ends of the trusses → checking → unloading.
Specifically, the method comprises the following steps:
a: paying-off and positioning
The truss is positioned on the floor in a paying-off mode before being assembled, the position of the truss before jacking is ensured to be consistent with the orthographic projection position of the truss after being installed, and therefore the truss after jacking is convenient to be consistent with the original position. Meanwhile, ink lines are flicked on the parapet wall surface according to the arching requirement, so that the arching degree of the truss is controlled.
B: splicing the steel trusses at two ends to the designed elevation
C: laying of moulding bed
The jig frame is made of H-shaped steel, and the stability of the jig frame is ensured by arranging the inclined struts;
d: assembling the steel truss at the position needing to be jacked;
after the lower chord of the truss is assembled, in order to ensure the integral stability of the truss, the lower chord of the truss part can be firstly assembled with the lower chord, and the rest trusses can be assembled after the truss is assembled.
E: steel truss jacking
1. According to the related technical parameters of the steel truss, 4 100T hydraulic jacks are planned to be adopted for synchronous jacking; 4 hydraulic rams are a set, are supplied oil by an oil pump, its performance should be supporting with the hydraulic ram. Hydraulic elements such as a double-acting flange self-locking hydraulic oil cylinder, an ultrahigh pressure electric pump (with pressure maintaining), a distribution valve, a high-pressure oil pipe and the like are combined together to form a pump station.
2. Flanges are arranged at the bottom and the top of the hydraulic jack and are connected and fixed with the temporary support and the main truss through the flanges so as to ensure that displacement does not occur in the jacking process; determining the height of each jacking step according to the stroke height of the hydraulic jack; inserting the steel support on the temporary support and at the elevation position of the bottom of the truss after the hydraulic jack is jacked to a set height, and jacking and unloading the hydraulic jack; the hydraulic jack supports the base to move upwards; and continuously repeating the processes until the truss reaches the design height.
The construction process completely solves the difficulty of limited integral hoisting on site, and the engineering quality is ensured.
This patent is with 2 the same truss monomers, and we calculate to a truss: 500t of departure fee is 50000 yuan, machine shift fee is 30000 yuan/day, and 5 machine shifts are used for 150000 yuan; the total number is about 200000 yuan. The cost of the lifting hydraulic jacking system consists of material cost and labor cost, wherein the material cost is about: 61000 Yuan, labor cost is about: 6600 yuan, 67600 yuan in total; the recycling cost of the lifting hydraulic jacking system is not considered, 132400 yuan can be saved by one truss construction cost, and 264800 yuan can be saved by two trusses.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (6)
1. A construction method of a large-span steel truss hydraulic jacking system is characterized by comprising the following steps:
paying off, positioning → installing steel trusses at two ends → paving a jig frame → assembling and welding a truss to be jacked on site → checking → installing jacking equipment, debugging → jacking the truss → welding two ends of the truss → checking → unloading;
specifically, the method comprises the following steps:
a: paying-off and positioning
Paying off and positioning are carried out on the floor before the truss is assembled, so that the position of the truss before jacking is ensured to be consistent with the orthographic projection position after the truss is installed, and the truss after jacking is convenient to be consistent with the original position; meanwhile, ink lines are flicked on the parapet wall surface according to the arching requirement, so that the arching degree of the truss is controlled;
b: splicing the steel trusses at two ends to the designed elevation
C: laying of moulding bed
The jig frame is made of H-shaped steel, and the stability of the jig frame is ensured by arranging the inclined struts;
d: assembling the steel truss at the position needing to be jacked;
after the lower chord of the truss is assembled, in order to ensure the integral stability of the truss, the lower chord of the truss part can be firstly assembled with the lower chord, and the rest trusses can be assembled after the truss is assembled;
e: steel truss jacking
1) According to the related technical parameters of the steel truss, 4 100T hydraulic jacks are planned to be adopted for synchronous jacking; 4 hydraulic rams are a group, are supplied with oil by an oil pump, its performance should be matched with hydraulic ram; hydraulic elements such as a double-acting flange self-locking hydraulic oil cylinder, an ultrahigh pressure electric pump (with pressure maintaining), a distribution valve, a high-pressure oil pipe and the like are combined together to form a pump station;
2) the bottom and the top of the hydraulic top are provided with flanges which are connected and fixed with the temporary support and the main truss through the flanges so as to ensure that the hydraulic top does not displace in the jacking process; determining the height of each jacking step according to the stroke height of the hydraulic jack; inserting the steel support on the temporary support and at the elevation position of the bottom of the truss after the hydraulic jack is jacked to a set height, and jacking and unloading the hydraulic jack; the hydraulic jack supports the base to move upwards; and continuously repeating the processes until the truss reaches the design height.
2. The utility model provides a large-span steel truss hydraulic jacking system which characterized in that includes: the lifting-up system is used for lifting up the steel plate,
h-shaped steel beams are arranged on a truss bracket of the jacking device, positioning guide rails are arranged at the tail ends of the adjacent H-shaped steel beams, and the guide rails slide along the rails on the concrete columns; a reinforcing strip is arranged on one side of the positioning guide rail and close to the jacking device;
the periphery of jacking system is equipped with four interim fulcrums, and interim fulcrum is located on lower floor's concrete column, is equipped with reinforceing system between fulcrum and the fulcrum, and interim fulcrum forms square structure, and the periphery of interim fulcrum is equipped with the truss bracket, and the truss bracket reciprocates along interim fulcrum.
3. The hydraulic jacking system for the large-span steel truss according to claim 1, wherein the jacking system further comprises a hydraulic ram, and flanges are arranged at the bottom and the top of the hydraulic ram.
4. The large-span steel truss hydraulic jacking system as claimed in claim 1, wherein the hydraulic ram is 4 100T double-acting flange self-locking hydraulic cylinders, oil is supplied by an oil pump, and the performance of the hydraulic ram is matched with that of the hydraulic ram.
5. The hydraulic jacking system for the large-span steel truss according to claim 1, wherein a falling prevention strip is arranged outside the temporary fulcrum and below the truss support.
6. The hydraulic jacking system for the large-span steel truss according to claim 1, wherein a reinforcing member is arranged below the truss support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010614278.3A CN111809885A (en) | 2020-06-30 | 2020-06-30 | Large-span steel truss hydraulic jacking system and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010614278.3A CN111809885A (en) | 2020-06-30 | 2020-06-30 | Large-span steel truss hydraulic jacking system and construction method thereof |
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| CN111809885A true CN111809885A (en) | 2020-10-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115162773A (en) * | 2022-09-01 | 2022-10-11 | 中建八局第二建设有限公司 | Temporary supporting device for large-scale suspension steel structure and construction method |
-
2020
- 2020-06-30 CN CN202010614278.3A patent/CN111809885A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115162773A (en) * | 2022-09-01 | 2022-10-11 | 中建八局第二建设有限公司 | Temporary supporting device for large-scale suspension steel structure and construction method |
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Application publication date: 20201023 |