CN112411753B - Construction method of large-span suspended steel truss girder structure - Google Patents
Construction method of large-span suspended steel truss girder structure Download PDFInfo
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- CN112411753B CN112411753B CN202011344299.4A CN202011344299A CN112411753B CN 112411753 B CN112411753 B CN 112411753B CN 202011344299 A CN202011344299 A CN 202011344299A CN 112411753 B CN112411753 B CN 112411753B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/342—Structures covering a large free area, whether open-sided or not, e.g. hangars, halls
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- 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
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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
The invention discloses a construction method of a large-span suspended steel truss girder structure, which comprises the following steps: s1: two rotation axes are marked on the assembly site in a parallel lofting manner; s2: arranging turnover auxiliary devices along the two rotation axes; s3: dividing the truss into a truss sheet I and a truss sheet II, and then respectively assembling the truss sheet I and the truss sheet II outside the two rotation axes to form a complete truss sheet I and a complete truss sheet II; s4: the first truss sheet and the second truss sheet are turned by 90 degrees towards the opposite sides of the two axes by the turning auxiliary device, so that the first truss sheet and the second truss sheet are butted, and the truss assembly is completed; s5: and arranging hoisting equipment above the assembling field, and lifting the truss to an elevation by using the equipment. The invention effectively avoids the overhead operation of truss assembly, accelerates the construction efficiency, improves the construction safety and can be widely applied to the technical field of construction operation of large-span suspended truss girder sections.
Description
Technical Field
The invention relates to the technical field of steel truss girder installation operation. More particularly, the invention relates to a construction method of a large-span suspended steel truss girder structure.
Background
For the construction of a long-span steel truss structure, common methods include a bracket split method, a segmental hoisting method, an integral hoisting method and the like.
The support assembly method adopts full supports, few supports or combined supports as a supporting structure, and the assembly construction of the truss structure is carried out on the erected platform. By adopting the method, the building period of the platform structure is long, and the probability that the construction is influenced by weather is increased; the steel truss girder is assembled at high altitude, and the structural welding, the bolt screwing quality and the integral structure line shape cannot be ensured; the three parts are assembled by adopting the bracket, so that workers need to work on the high-altitude platform for a long time, and the safety risk is high.
The segmental hoisting method is characterized in that the steel beam is divided into a plurality of segments, the segments are transported to the site through a transport vehicle after being assembled in a segment beam processing field, and hoisting equipment is hoisted to a pre-erected support platform to be assembled and connected into a whole. By adopting the method, one needs a special field to assemble the truss girder segment; after the sections of the two truss girder sections are assembled, large-scale transportation equipment is needed to transport the assembled truss girder sections to the site; the truss girder section is assembled in three high altitude, and the relative position between each section is difficult to control, and the whole linear shape of the structure can not be guaranteed.
The integral hoisting method is to assemble the truss structure on the open ground, and then integrally hoist and position the truss structure by large-scale hoisting equipment after the assembly is finished. By adopting the method, one person can be spliced immediately, and the operation of personnel is inconvenient and time-consuming; the bolt welding combination is adopted, the structure is easy to deform due to hanging construction welding, the installation of the deformed bolt is difficult, and the quality is difficult to control; the three pieces need the cooperation of a plurality of hoisting equipment, and the requirement on mechanical equipment and operating personnel is particularly high.
Disclosure of Invention
The invention provides a construction method of a long-span suspended steel truss girder structure, aiming at solving the defects in the background technology, improving the safety of site construction of a truss girder section, improving the construction efficiency, reducing the investment of construction cost and ensuring the installation quality of the truss girder section, and comprising the following steps:
s1: two rotation axes are marked on the assembly site in a parallel lofting manner;
s2: arranging turnover auxiliary devices along the two rotation axes;
s3: dividing the truss into a truss sheet I and a truss sheet II, and then respectively assembling the truss sheet I and the truss sheet II outside the two rotation axes to form a complete truss sheet I and a complete truss sheet II;
s4: the first truss sheet and the second truss sheet are turned by 90 degrees towards the opposite sides of the two axes by the turning auxiliary device, so that the first truss sheet and the second truss sheet are butted, and the truss assembly is completed;
s5: and arranging hoisting equipment above the assembling field, and lifting the truss to an elevation by using the equipment.
Preferably, before the rotation axis lofting marking before the step of S1, the construction site is subjected to a flattening hardening process.
Preferably, the two rotation axes are spaced in parallel by the same distance as the width of the truss.
Preferably, truss piece one with truss piece two all includes a plurality of truss units, every the truss unit all includes a pair of girder segment and connects to set up a pair ofly a plurality of connection down tube and a plurality of truss montant between the girder segment, and is a plurality of the both ends of truss montant set up perpendicularly a pair ofly the corresponding inside wall and all truss montants of girder steel are followed length direction interval distribution between the steel girder, and adjacent two set up a pair ofly between the truss montant connect the down tube, and be the V type and distribute.
Preferably, the first truss piece is provided with a transverse connecting rod, and the S3 includes the following steps:
a1: lofting and marking the splicing position of the truss units outside the rotation axis to obtain a segmentation line;
a2: splicing the truss units among the segment lines, and connecting the truss units into a complete truss sheet I and a truss sheet II;
a3: lofting and marking the installation nodes of the transverse connecting rods on the truss sheet I to obtain connecting rod lofting points;
a4: and aligning the connection rod lofting point to install the transverse connection rod on the first truss piece.
Preferably, a site cushion layer is arranged below the first truss sheet and the second truss sheet, and the height of the site cushion layer is the same as that of the turnover auxiliary device.
Preferably, the turning assisting device is a pair of L-shaped structures arranged oppositely, corners of the L-shaped structures are in contact with the ground, and the corners of the L-shaped structures are arc-shaped, and the step S4 further includes:
b1: lifting the left end of the first truss sheet, and enabling the right end of the first truss sheet to abut against the overturning auxiliary device, so that the whole first truss sheet is overturned to the right by 90 degrees;
b2: and hoisting the right end of the truss piece II, enabling the left end of the truss piece I to abut against the overturning auxiliary device, enabling the truss piece II to be integrally overturned for 90 degrees leftwards, and being in butt joint with the truss piece I to complete truss assembly.
Preferably, the hoisting apparatus comprises a pair of cranes and a truss spreader, and the S5 further comprises the steps of:
c1: arranging a pair of cranes to the upper part of a designed elevation and connecting the hoisting ends of the cranes with the tops of two ends of the truss lifting appliance;
c2: and (3) lowering the truss lifting appliance to the position right above the truss by using the crane, hanging and then lifting the truss to a designed elevation.
Preferably, the truss lifting appliance is of a fish-bellied arch structure and comprises an upper beam, a lower beam and a hanging point;
the upper beam is arched, the lower beam is linear, and a plurality of support columns are vertically arranged between the upper beam and the lower beam at intervals;
the hanging points are arranged at the bottom of the lower beam at intervals.
The invention at least comprises the following beneficial effects:
1. safety: the method has the advantages that the loose assembly construction of the truss girder section is mainly carried out on the ground, the high-altitude operation time is greatly reduced, and the construction safety is guaranteed;
2. economy: the method aims at the construction of the long-span truss girder section, has strong applicability, can save the assembly field, can avoid the investment of large-scale hoisting equipment, and can greatly reduce the construction cost;
3. high efficiency: the installation and debugging of the hoisting system and the ground assembly of the truss girder section can be carried out simultaneously, and compared with other methods, the method does not need to set up a support platform and pre-press, thereby improving the on-site construction efficiency;
4. the application range is wide: the method is suitable for construction of most of truss sections, and is particularly suitable for construction of truss sections which are combined by bolting and welding and have large height-to-width ratio.
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.
Drawings
FIG. 1 is a top view of a rotational axis and section line loft;
FIG. 2 is a top plan view of a first truss piece and a second truss piece in a laid-together configuration;
FIG. 3 is a schematic view of a first truss sheet and a second truss sheet before being turned over;
FIG. 4 is a schematic illustration of the first truss sheet and the second truss sheet during inversion;
FIG. 5 is a schematic view of a first truss sheet and a second truss sheet after being turned over;
FIG. 6 is a front view of a truss hoist lifting truss;
description of reference numerals:
1. truss girder section, 2, segmentation line, 3, axis of rotation, 4, truss piece one, 5, truss piece two, 6, truss montant, 7, connection down tube, 8, transverse connection pole, 9, upset auxiliary device, 10, place bed course, 11, upper beam, 12, underbeam, 13, bridging point, 14, support column, 15, hoist.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
In the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1 to 6, the invention provides a construction method of a large-span suspended steel truss girder structure, which comprises the following steps:
s1: two rotation axes 3 are marked on the assembly site in parallel lofting;
s2: arranging overturning auxiliary devices 9 along the two rotation axes 3;
s3: dividing the truss into a truss sheet I4 and a truss sheet II 5, and then respectively assembling the truss sheets I4 and II 5 outside the two rotation axes 3 to form a complete truss sheet I4 and a complete truss sheet II 5;
s4: turning the first truss sheet 4 and the second truss sheet 5 by 90 degrees towards opposite sides of the two axes by using the turning auxiliary device 9, so that the first truss sheet 4 and the second truss sheet 5 are butted to finish the truss assembly;
s5: and arranging hoisting equipment above the assembling field, and lifting the truss to an elevation by using the equipment.
In the technical scheme, the truss pieces I4 and II 5 are horizontally spliced on the splicing site, and then the truss pieces I4 and II 5 are turned over by 90 degrees to the opposite sides of the two axes through the turning auxiliary device 9 to complete the splicing and butt joint of the trusses, so that the overhead operation of truss splicing is effectively avoided, the construction efficiency is accelerated, and the construction safety is improved.
In another technical solution, before the lofting marking of the rotation axis 3 before the step of S1, the assembly yard needs to be leveled and hardened.
In another solution, the two rotation axes 3 are spaced in parallel by the same distance as the width of the truss.
In another kind of technical scheme, truss piece one 4 with truss piece two 5 all includes a plurality of truss units, every the truss unit all includes a pair of girder segment 1 and connects to set up a pair ofly a plurality of connection down tube 7 and a plurality of truss montant 6 between the girder segment 1, it is a plurality of the perpendicular setting in both ends of truss montant 6 is a pair of the corresponding inside wall and all truss montants 6 of girder steel are followed length direction interval distribution between the steel truss to and adjacent two set up a pair ofly between the truss montant 6 connect the down tube 7, and be the V type and distribute.
In another technical solution, a transverse connecting rod 8 is provided on the first truss piece 4, and the S3 includes the following steps:
a1: lofting and marking the splicing positions of the truss units outside the rotation axis 3 to obtain a section line 2;
a2: splicing the truss units between the segment lines 2, and connecting the truss units into a complete truss sheet I4 and a truss sheet II 5;
a3: lofting and marking the installation nodes of the transverse connecting rods 8 on the truss sheets I4 to obtain connecting rod lofting points;
a4: and installing the transverse connecting rods 8 on the truss pieces 4 by aligning the connecting rod lofting points.
In another technical scheme, a site cushion layer 10 is arranged below the first truss piece 4 and the second truss piece 5, and the height of the site cushion layer 10 is the same as that of the turnover auxiliary device 9.
In another technical solution, the turning assisting device 9 is a pair of L-shaped structures disposed oppositely, corners of the L-shaped structures contact with the ground, and the corners of the L-shaped structures are arc-shaped, and the step S4 further includes:
b1: hoisting the left end of the truss sheet I4, and enabling the right end of the truss sheet I4 to abut against the overturning auxiliary device 9, so that the truss sheet I4 is integrally overturned to the right by 90 degrees;
b2: and hoisting the right end of the truss sheet II 5, and enabling the left end of the truss sheet I4 to abut against the overturning auxiliary device 9, so that the truss sheet II 5 is integrally overturned for 90 degrees leftwards and is in butt joint with the truss sheet I4 to complete truss assembly.
In another embodiment, the hoisting apparatus includes a pair of cranes 15 and a truss spreader, and the S5 further includes the following steps:
c1: arranging a pair of cranes 15 to the upper part of a designed elevation and connecting the hoisting ends of the cranes 15 with the tops of the two ends of the truss spreader;
c2: and (3) lowering the truss lifting appliance to the position right above the truss by using the crane 15, hanging and then hoisting the truss to the designed elevation.
In another technical scheme, the truss lifting appliance is of a fish-bellied arch structure and comprises an upper beam 11, a lower beam 12 and a hanging point 13; the upper beam 11 is arched, the lower beam 12 is linear, and a plurality of support columns 14 are vertically arranged between the upper beam 11 and the lower beam 12 at intervals; the hanging points 13 are arranged at the bottom of the lower beam 12 at intervals.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (9)
1. A construction method of a large-span suspended steel truss girder structure, wherein the steel truss girder comprises a truss, is characterized by comprising the following steps:
s1: two rotation axes are marked on the assembly site in a parallel lofting manner;
s2: arranging turnover auxiliary devices along the two rotation axes;
s3: dividing the truss into a truss sheet I and a truss sheet II, and then respectively assembling the truss sheet I and the truss sheet II outside the two rotation axes to form a complete truss sheet I and a complete truss sheet II;
s4: the first truss sheet and the second truss sheet are turned by 90 degrees towards the opposite sides of the two axes by the turning auxiliary device, so that the first truss sheet and the second truss sheet are butted, and the truss assembly is completed;
s5: arranging hoisting equipment above the assembly field, and hoisting the truss to an elevation by using the hoisting equipment;
the turnover auxiliary device is a pair of L-shaped structures which are oppositely arranged, the corners of the L-shaped structures are in contact with the ground, and the corners of the L-shaped structures are arc-shaped.
2. The construction method of the long-span suspended steel truss girder structure as claimed in claim 1, wherein before the rotation axis lofting marking before the step of S1, the assembling field is required to be leveled and hardened.
3. The construction method of the long-span suspended steel truss girder structure as claimed in claim 1, wherein the parallel spacing between the two rotation axes is the same as the width of the truss girder.
4. The construction method of the long-span suspended steel truss girder structure as claimed in claim 1, wherein the truss sheet I and the truss sheet II each comprise a plurality of truss units, each truss unit comprises a pair of truss sections, and a plurality of connecting struts and a plurality of truss vertical rods which are connected and arranged between the pair of truss sections, two ends of the plurality of truss vertical rods are vertically arranged on corresponding inner side walls of the pair of truss sections, all truss vertical rods are distributed at intervals along the length direction between the truss sections, and a pair of connecting struts is arranged between two adjacent truss vertical rods and distributed in a V shape.
5. The construction method of the long-span suspended steel truss girder structure as claimed in claim 4, wherein the truss pieces are provided with transverse connecting rods on one, and the step S3 comprises the following steps:
a1: lofting and marking the splicing position of the truss units outside the rotation axis to obtain a segmentation line;
a2: splicing the truss units among the segment lines, and connecting the truss units into a complete truss sheet I and a truss sheet II;
a3: lofting and marking the installation nodes of the transverse connecting rods on the truss sheet I to obtain connecting rod lofting points;
a4: and aligning the connection rod lofting point to install the transverse connection rod on the first truss piece.
6. The construction method of the long-span suspended steel truss girder structure as claimed in claim 5, wherein a site bed course is arranged below the first truss sheet and the second truss sheet, and the height of the site bed course is the same as that of the overturning auxiliary device.
7. The construction method of the long-span suspended steel truss girder structure as claimed in claim 1, wherein the S4 further comprises the steps of:
b1: lifting the left end of the first truss sheet, and enabling the right end of the first truss sheet to abut against the overturning auxiliary device, so that the whole first truss sheet is overturned to the right by 90 degrees;
b2: and hoisting the right end of the truss piece II, enabling the left end of the truss piece I to abut against the overturning auxiliary device, enabling the truss piece II to be integrally overturned for 90 degrees leftwards, and being in butt joint with the truss piece I to complete truss assembly.
8. The method of constructing a long-span suspended steel truss girder structure as claimed in claim 1, wherein said hoisting equipment comprises a pair of cranes and a truss spreader, and said S5 further comprises the steps of:
c1: arranging a pair of cranes to the upper part of a designed elevation and connecting the hoisting ends of the cranes with the tops of two ends of the truss lifting appliance;
c2: and (3) lowering the truss lifting appliance to the position right above the truss by using the crane, hanging and then lifting the truss to a designed elevation.
9. The construction method of the long-span suspended steel truss girder structure as claimed in claim 8, wherein the truss slings are fish-bellied arch structures and comprise upper girders, lower girders and hanging points;
the upper beam is arched, the lower beam is linear, and a plurality of support columns are vertically arranged between the upper beam and the lower beam at intervals;
the hanging points are arranged at the bottom of the lower beam at intervals.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011344299.4A CN112411753B (en) | 2020-11-25 | 2020-11-25 | Construction method of large-span suspended steel truss girder structure |
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| CN202011344299.4A CN112411753B (en) | 2020-11-25 | 2020-11-25 | Construction method of large-span suspended steel truss girder structure |
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| CN112411753A CN112411753A (en) | 2021-02-26 |
| CN112411753B true CN112411753B (en) | 2022-04-22 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000008479A (en) * | 1998-06-19 | 2000-01-11 | Ohbayashi Corp | Shape variable trussed frame |
| CN203583901U (en) * | 2013-11-14 | 2014-05-07 | 四川华铁钢结构有限公司 | Universal assembling jig frame for any trusses |
| CN210263375U (en) * | 2019-05-23 | 2020-04-07 | 欧华生 | Truss connection structure |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102220811B (en) * | 2011-04-18 | 2012-09-05 | 武船重型工程股份有限公司 | Truss arching-erecting splicing method of extra-large-pan steel pipe |
| CN205152802U (en) * | 2015-11-22 | 2016-04-13 | 中铁十八局集团有限公司 | Improve structure of arched bridge strength nature skeleton building -site preparation precision |
| CN105821775B (en) * | 2016-03-24 | 2017-07-07 | 中交第四公路工程局有限公司 | Arch rib construction method is overturn using cable crane |
-
2020
- 2020-11-25 CN CN202011344299.4A patent/CN112411753B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000008479A (en) * | 1998-06-19 | 2000-01-11 | Ohbayashi Corp | Shape variable trussed frame |
| CN203583901U (en) * | 2013-11-14 | 2014-05-07 | 四川华铁钢结构有限公司 | Universal assembling jig frame for any trusses |
| CN210263375U (en) * | 2019-05-23 | 2020-04-07 | 欧华生 | Truss connection structure |
Non-Patent Citations (2)
| Title |
|---|
| 大跨度大体量复杂空间网架钢结构双向旋转提升施工技术;丁党盛等;《住宅与房地产》;20171115(第32期);第168-169页 * |
| 小榄水道特大桥钢管拱竖向转体施工技术;刘金生;《公路》;20110525(第05期);第102-105页 * |
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