CN109025286A - A kind of construction method of large span high-altitude three-dimensional canopy of the heavens steel construction - Google Patents
A kind of construction method of large span high-altitude three-dimensional canopy of the heavens steel construction Download PDFInfo
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- CN109025286A CN109025286A CN201810803177.3A CN201810803177A CN109025286A CN 109025286 A CN109025286 A CN 109025286A CN 201810803177 A CN201810803177 A CN 201810803177A CN 109025286 A CN109025286 A CN 109025286A
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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
- 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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Abstract
The present invention provides a kind of construction methods of large span high-altitude three-dimensional canopy of the heavens steel construction, comprising: establishes the three-dimensional structure diagram of construction site, simulation overall process lifting determines optimal sequence of construction and Hoisting Program；Large-span truss is lifted and carries out sunykatuib analysis, determines hoisting point position and pre- springing quantum；The threedimensional model for establishing the stereochemical structure of Pressures On Complex Large-span degree high-altitude three-dimensional canopy of the heavens steel construction, instructs factory's rod piece to process and assists site operation；The installation on ground of truss is carried out using three-dimensional space tubular truss assembly moulding bed at the scene；Space orientation measurement is carried out in such a way that total station and threedimensional model combine, is sequentially completed steel column, space main couple, plane jack truss, the lifting of fashioned iron secondary beam.Energy Optimizing Construction Scheme of the present invention improves rod piece factory process precision, truss installation on ground precision, component upper air installing precision, while guaranteeing construction safety and construction quality, accelerates construction progress, and reduces construction cost.
Description
Technical field
The present invention relates to a kind of construction techniques, and in particular to a kind of construction of large span high-altitude three-dimensional canopy of the heavens steel construction
Method belongs to technical field of building construction.
Background technique
With flourishing for down town Commercial Complex, broad, atmosphere design innovation is also increasingly highlighted, greatly across
Degree high-altitude three-dimensional steel construction canopy of the heavens body have become the fashion of modern commerce Group Buildings and lead trend, canopy of the heavens steel construction mainly by
Steel construction is made of steel column, space main couple, plane jack truss, fashioned iron secondary beam, in existing construction technology, due to place and knot
Structure complexity is difficult to find a kind of unique method Optimizing construction sequence and arrangement and method for construction, ensures machining accuracy, splicing accuracy, hangs
Fill precision, cause large span high-altitude three-dimensional canopy of the heavens steel structure forming ineffective, exist reprocess and its caused schedule delays and
The problem of economic loss.
Therefore, there is an urgent need to a kind of energy Optimizing Construction Scheme, to raising rod piece factory process precision, truss installation on ground essence
Degree, component upper air installing precision are advantageous, guarantee construction safety and construction quality, accelerate construction progress, reduce the big of construction cost
Span high-altitude three-dimensional canopy of the heavens Construction of Steel Structure method.
Summary of the invention
The purpose of the present invention is to provide a kind of construction methods of large span high-altitude three-dimensional canopy of the heavens steel construction, can improve construction
Precision guarantees construction safety and construction quality, accelerates construction progress, and reduces construction cost.
The present invention is implemented as follows:
A kind of construction method of large span high-altitude three-dimensional canopy of the heavens steel construction, includes the following steps:
Step 1: establishing the three-dimensional structure diagram in complicated construction place using three-dimensional space analog module, simulation overall process is hung
Dress, carries out analysis verifying to hoisting and hanging scheme, determines optimal sequence of construction and Hoisting Program；
Sunykatuib analysis is carried out Step 2: lifting using finite element software to large-span truss, determines hoisting point position and pre-
Arch value；
Step 3: establishing the three-dimensional knot of Pressures On Complex Large-span degree high-altitude three-dimensional canopy of the heavens steel construction using three-dimensional space analog module
The threedimensional model of structure instructs factory's rod piece to process and assists site operation；
Step 4: the installation on ground of truss is carried out using three-dimensional space tubular truss assembly moulding bed at the scene；
Step 5: carry out space orientation measurement in such a way that total station and threedimensional model combine, be sequentially completed steel column,
Space main couple, plane jack truss, the lifting of fashioned iron secondary beam.
Further scheme is:
The specific steps of step 1 are as follows:
1., using three-dimensional space analog module, establish the three-dimensional structure diagram of construction site, including main structure of having constructed,
Road, material stockyard, tower crane, periphery existing building and structures；
2., according to construction site three-dimensional structure diagram, simulate lifting equipment in the hoisting process of Different Plane erect-position, analyze it
Whether work range and lifting altitude collide with tower crane, building, and can hoist ability meet the requirements；It is suitable to simulate different liftings
Sequence, discovery hindering factor simultaneously calculate hindering factor solve duration and lifting the duration, see lifting the duration whether meet total construction period require,
It is whether most short；Verified by carrying out a series of analysis to various plane Hoisting Programs, summarize the Hoisting Security obtained, obstruction because
Element less, the low sequence of construction and Hoisting Program of short time limit, expense be optimal sequence of construction and Hoisting Program.
Further scheme is:
Step 2 specifically: described lifted using finite element software to large-span truss carries out sunykatuib analysis, main to calculate
With the stress performance (variation of internal force) and deformation performance (vertical displacement, deformation) of truss in analysis hoisting process, stress
It can be determined as the hoisting point position used with the smallest position of deformation performance, corresponding vertical displacement is the pre- arch camber of large-span truss
Value.
Further scheme is:
The threedimensional model major embodiment component of the stereochemical structure of Pressures On Complex Large-span degree high-altitude three-dimensional canopy of the heavens steel construction it is whole
Body form, segmentation situation, specification, model, size, connection method, pre- springing quantum etc..
Further scheme is:
It is described that factory's rod piece is instructed to be processed as combining threedimensional model into progress rod piece processing system with three-dimensional automatic gas cutting machine
Make.
Further scheme is:
The three-dimensional space tubular truss assembly moulding bed includes that multiple support units disposed in parallel and each support of connection are single
The vertical equity beam of member；The support unit includes pedestal, is successively arranged left support column, left support from left to right on pedestal
Bar, right support bar, right support column；The pedestal, left support column, left support bar, right support bar, right support column are equipped with
Bolt connecting hole, bolt pass through bolt connecting hole and are fixed on left support column, left support bar, right support bar, right support column
On pedestal；When needing to change the width of three-dimensional space tubular truss, mobile left support column, left support bar, right support bar, right branch
The position of column on the base is supportted, realizes the adjustment of three-dimensional space tubular truss width；The left support column is equipped with left support
Joist, bolt pass through bolt connecting hole and left support joist are fixed on left support column；The right support column is equipped with the right side
Joist is supported, bolt passes through bolt connecting hole and right support joist is fixed on right support column；In left support joist, right support
Moveable snap-gauge is set on joist；When needing to change the absolute altitude of three-dimensional space tubular truss, mobile left support joist is in left support
Position on column, and position of the mobile right support joist on right support column, realize three-dimensional space tubular truss absolute altitude
Adjustment；The crossbeam, left support joist are respectively equipped with fine tuning backing plate on right support joist；Distinguish the two sides of different supporting unit
Equipped with two vertical equity beams, it is located at the lower part and middle part of each support unit.
Further scheme is:
It is described to carry out space orientation measurement in such a way that total station and threedimensional model combine and mainly pass through threedimensional model
Accurate coordinates point required for constructing and elevation are obtained, cooperation total station carries out three dimension location measurement, controls steel column, truss
Absolute altitude, truss verticality improve steel structural overhead installation accuracy.
The present invention is surveyed using three-dimensional space simulation, finite element analysis, three-dimensional space tubular truss assembly moulding bed, three-dimensional space
Amount realizes steel tube component intersection deviation qualification rate >=95%, truss assembly qualification rate >=95%, key node accuracy
It is high.
The present invention have it is following the utility model has the advantages that
1, it is simulated using three-dimensional space and complicated construction scene modeling Simulation is lifted, it can Optimizing construction sequence and lifting side
Case, it is ensured that construction safety accelerates construction progress；
2, hoisting point position and pre- springing quantum can determine using truss lifting finite element analysis technology, it is ensured that construction safety and apply
Working medium amount；
3, it is simulated using three-dimensional space and rod piece factory process and auxiliary is instructed to the modeling of large span high-altitude three-dimensional canopy of the heavens steel construction
Site operation is helped, rod piece factory process precision can be improved, reduction is done over again and construction delay, save the cost；
4, truss splicing accuracy can be improved using the installation on ground that a kind of three-dimensional space tubular truss assembly moulding bed carries out truss,
Reduction is done over again and construction delay, save the cost；
5, large span high-altitude three-dimensional canopy of the heavens steel construction disposal molding rate can be improved using three dimension location measuring technique
Quality accelerates construction progress, and guarantees construction quality.
Detailed description of the invention
Fig. 1 is the elevation of building schematic diagram of large span high-altitude three-dimensional canopy of the heavens steel construction；
Fig. 2 is the construction site three-dimensional structure diagram of three-dimensional simulation；
Fig. 3 is truss lifting finite element analysis illustraton of model；
Fig. 4 is the canopy of the heavens steel construction three-dimensional structure diagram of three-dimensional simulation；
Fig. 5 is the node A detail drawing of Fig. 4；
Fig. 6 is the node B detail drawing (steel column and space truss connecting node figure) of Fig. 5；
Fig. 7 is the node C detail drawing (space truss and plane girder connecting node figure) of Fig. 5；
Fig. 8 is the node D detail drawing (truss and fashioned iron time beam connecting node figure) of Fig. 5；
Fig. 9 is the schematic view of the front view of three-dimensional space tubular truss assembly moulding bed；
Figure 10 is the side structure schematic view of three-dimensional space tubular truss assembly moulding bed；
Figure 11 is the overlooking structure diagram of three-dimensional space tubular truss assembly moulding bed；
Figure 12 is the A-A diagrammatic cross-section of Fig. 9；
Figure 13 is the B-B diagrammatic cross-section of Fig. 9；
Figure 14 is the C-C diagrammatic cross-section of Fig. 9.
Wherein: 1, steel column, 2, space truss, 3, plane girder, 4, the main structure constructed, 5, tower crane, 6, road, 7,
Material stockyard, 8, pedestal, 9-1, left support column, 9-2, right support column, 10-1, left support bar, 10-2, right support bar, 11-
1, left support joist, 11-2, right support joist, 12-1, left support brace, 12-2, right support brace, 13, fine tuning backing plate, 14,
Snap-gauge, 15, crossbeam, 16-1, left support column otic placode, 16-2, right support column otic placode, 17, vertical equity beam, 18, bolt company
Connect hole.
Specific embodiment
With reference to the accompanying drawings and detailed description, to further detailed description of the invention:
Referring to shown in Fig. 1 to Figure 14, a kind of construction method of large span high-altitude three-dimensional canopy of the heavens steel construction, including walk as follows
It is rapid:
Step 1: establishing complicated construction field according to design drawing and reconnaissance trip situation using three-dimensional space analog module
The three-dimensional structure diagram on ground simulates overall process lifting including main structure 4, tower crane 5, road 6, the material stockyard 7 etc. constructed,
Analysis verifying is carried out to hoisting and hanging scheme, determines optimal sequence of construction and Hoisting Program；
Sunykatuib analysis is carried out Step 2: lifting using finite element software to large-span truss, calculates and analyze hoisting process
The stress performance (variation of internal force) and deformation performance (vertical displacement, deformation) of middle truss determine suspension centre position based on the analysis results
It sets and the pre- springing quantum of large-span truss；
Step 3: using three-dimensional space analog module, the canopy of the heavens steel construction and building that are provided according to original design drawing
Relationship between axis establishes three-dimensional coordinate system, establishes the three-dimensional structure diagram of Pressures On Complex Large-span degree high-altitude three-dimensional canopy of the heavens steel construction,
By steel column 1, space truss 2, the integral form of plane girder 3, segmentation situation, specification, model, size, connection method, pre- arch camber
Value embodiment is clear, and threedimensional model is combined with three-dimensional automatic gas cutting machine and carries out rod piece processing and fabricating；
Step 4: the installation on ground of truss is carried out using a kind of three-dimensional space tubular truss assembly moulding bed at the scene, described one
Kind three-dimensional space tubular truss assembly moulding bed includes longitudinal water of n support units disposed in parallel and each support unit of connection
Flat-topped ridge 17；
The support unit includes pedestal 8, is successively arranged left support column 9-1, left support bar on pedestal 8 from left to right
10-1, right support bar 10-2, right support column 9-2；The pedestal 8, left support column 9-1, left support bar 10-1, right support bar
10-2, right support column 9-2 are equipped with the bolt connecting hole 18 that spacing is 50mm, and bolt passes through bolt connecting hole 18 for left support
Column 9-1, left support bar 10-1, right support bar 10-2, right support column 9-2 are fixed on pedestal 1；When needing to change three-dimensional space
Between tubular truss width when, mobile left support column 9-1, left support bar 10-1, right support bar 10-2, right support column 9-2 exist
The adjustment of three-dimensional space tubular truss width is realized in position on pedestal 8；
The left support column 9-1 is equipped with left support joist 11-1, and bolt passes through bolt connecting hole 18 for left support support
Beam 11-1 is fixed on left support column 9-1；Right support column 9-2 is equipped with right support joist 11-2, and bolt connects across bolt
It connects hole 18 right support joist 11-2 is fixed on right support column 9-1；In left support joist 11-1, right support joist 11-2
On set fine tuning backing plate 13, moveable snap-gauge 14, snap-gauge 14 can not only consolidate the string pipe of triangle tubular truss, be convenient for triangular pipe purlin
The assembling of frame, and can prevent string pipe from falling off and support joist, avoid the accident in work progress, it is ensured that construction safety；Left branch
Strut 10-1, right support bar 10-2 are connected by crossbeam 15, and bolt passes through bolt connecting hole 18 for crossbeam 15 and left support bar
10-1, right support bar 10-2 are fixedly connected, the setting fine tuning backing plate 13 on crossbeam 15；When needing to change three-dimensional space tubular truss
When absolute altitude, position of the mobile left support joist 11-1 on left support column 9-1, mobile right support joist 11-2 are vertical in right support
The position of position, moving beam 15 on column 9-2, setting fine tuning backing plate 13, the adjustment for realizing three-dimensional space tubular truss absolute altitude；
The two sides of the support unit are respectively equipped with two vertical equity beams 17, and two vertical equity beams 17 are located at respectively
(that is: there are two vertical equity beams 17 at the lower part of support unit and middle part on each left support column 9-1, it is vertical to be located at left support
There are two vertical equity beams 17 in the lower part and middle part of column 9-1 on each right support column 9-2, are located at right support column 9-2
Lower part and middle part), and vertical equity beam is connect by bolt, bolt connecting hole with ipsilateral support post, which can increase
Add overall stability；
In order to enhance the rigid hardness of single support unit, keep total more stable, it can be on left support column 9-1
If setting right support column otic placode 16-2 on left support column otic placode 16-1, right support column 9-2, bolt passes through bolt connecting hole 18
By crossbeam 15 and left support column otic placode 16-1, right support column otic placode 16-2, left support column 9-1, right support column 9-2
Fixed, crossbeam 15 is by bolt, bolt connecting hole 18 by left support column otic placode 16-1, right support column otic placode 16-2, left branch
Support column 9-1, left support bar 10-1, right support bar 10-2, right support column 9-2 connect into an entirety.
In order to improve support joist bearing capacity and stability, keep structure more stable, can be at left support joist 11-1
If left support brace 12-1, one end of left support brace 12-1 is connect by bolt with the otic placode on left support joist 11-1, left
The other end of knighthead 12-1 is connect by bolt with the bolt connecting hole 18 on left support column 9-1, and triangle knot is formed
Structure；Right support brace 12-2 is divided into right support joist 11-2, one end of right support brace 12-2 passes through bolt and right support support
Otic placode connection on beam 11-2, the other end of right support brace 12-2 by bolt on right support column 9-2 bolt connect
Hole 18 connects, and forms triangular structure.
Left support column 9-1, right support column 9-2, left support bar 10-1, the root right support bar 10-2 are welded with connection strength
Plate, connection strength plate are connect by bolt, bolt connecting hole 18 with pedestal 8；Left support joist 11-1, right support joist 11-2, a left side
Knighthead 12-1, the root right support brace 12-2 are welded with connection strength plate, and connection strength plate passes through bolt, bolt connecting hole 18 and same
The support post of side connects；The root of snap-gauge 14 be welded with connection strength plate, connection strength plate by bolt, bolt connecting hole 18 with it is ipsilateral
Support joist connection；To improve overall stability and safety.
In order to reduce cost of manufacture, pedestal 8, left support column 9-1, right support column 9-2, left support joist 11-1, the right side
H profile steel production can be used in support joist 11-2；Vertical equity beam 17, crossbeam 15, left support bar 10-1, right support bar 10-2, a left side
Knighthead 12-1, right support brace 12-2, snap-gauge 14, otic placode are all made of angle steel production.
It is provided with two rows of bolt connecting holes 18 on the inside of 8 top of the support unit pedestal, support column, supporting bracket back portion,
Support rod joint face, vertical equity beam joint face, crossbeam joint face are provided with row's bolt connecting hole 18, bolt connecting hole 18
Vertical, horizontal spacing be 50mm.Hole 18, which is bolted, realizes adjustability of the three-dimensional space tubular truss apart from size, mentions
The applicability of high moulding bed.
By the bolt connecting hole on left support column 9-1, left support bar 10-1, right support bar 10-2, right support column 9-2
18 (spacing of bolt connecting hole 18 is set as 50mm) are adjusted as level-one absolute altitude, by left support joist 11-1, right support joist
Fine tuning backing plate 13 on 11-2 and crossbeam 15 is adjusted as second level absolute altitude, can flexibly control the absolute altitude of three-dimensional space tubular truss, fixed
Position precision is high；By the way that the bolt on 8 top of pedestal, 15 joint face of crossbeam, left support joist 11-1, right support joist 11-2 connects
The width of space truss can be adjusted flexibly in hole 18 (spacing of bolt connecting hole is 50mm), to adapt to different section morphologies；It is vertical
Be arranged on horizontal beam 17 bolt connecting hole 18 (spacing of bolt connecting hole be 50mm) can flexible modulation truss longitudinal register, have
Conducive to connecting node is avoided, it is conducive to tread flaking and lifts by crane；Above structure makes three-dimensional space tubular truss assembly moulding bed have strong applicability, spell
Packing quality is good, saves the advantages of construction cost.
Step 5: carrying out space orientation measurement in such a way that total station and threedimensional model combine, steel column, truss are controlled
Absolute altitude, truss verticality are sequentially completed steel column, space main couple, plane jack truss, the lifting of fashioned iron secondary beam, it is high to improve steel construction
Empty installation accuracy.
The present invention has a safety feature, and construction precision is high, and construction efficiency is high, and the low application value of construction cost is big.
Claims (7)
1. a kind of construction method of large span high-altitude three-dimensional canopy of the heavens steel construction, it is characterised in that include the following steps:
Step 1: using three-dimensional space analog module, the three-dimensional structure diagram of construction site is established, simulation overall process lifting, to rising
Weight Hoisting Program carries out analysis verifying, determines optimal sequence of construction and Hoisting Program；
Sunykatuib analysis is carried out Step 2: lifting using finite element software to large-span truss, determines hoisting point position and pre- springing quantum；
Step 3: establishing the stereochemical structure of Pressures On Complex Large-span degree high-altitude three-dimensional canopy of the heavens steel construction using three-dimensional space analog module
Threedimensional model instructs factory's rod piece to process and assists site operation；
Step 4: the installation on ground of truss is carried out using three-dimensional space tubular truss assembly moulding bed at the scene；
Step 5: carrying out space orientation measurement in such a way that total station and threedimensional model combine, it is sequentially completed steel column, space
Main couple, plane jack truss, the lifting of fashioned iron secondary beam.
2. the construction method of large span high-altitude three-dimensional canopy of the heavens steel construction according to claim 1, it is characterised in that:
The specific steps of step 1 are as follows:
, using three-dimensional space analog module, establish the three-dimensional structure diagram of construction site, including main structure of having constructed, road,
Material stockyard, tower crane, periphery existing building and structures；
, according to construction site three-dimensional structure diagram, simulate lifting equipment in the hoisting process of Different Plane erect-position, analyze its work
Whether amplitude and lifting altitude collide with tower crane, building, and can hoist ability meet the requirements；Different lifting sequences are simulated,
It was found that hindering factor and calculate hindering factor solve duration and lifting the duration, see lifting the duration whether meet total construction period require, be
It is no most short；It is verified by carrying out a series of analysis to various plane Hoisting Programs, summarizes the Hoisting Security obtained, hindering factor
Less, the low sequence of construction of short time limit, expense and Hoisting Program are optimal sequence of construction and Hoisting Program.
3. the construction method of large span high-altitude three-dimensional canopy of the heavens steel construction according to claim 1, it is characterised in that:
Described lifted using finite element software to large-span truss carries out sunykatuib analysis including calculating and analyzing purlin in hoisting process
The stress performance and deformation performance of frame, stress performance and the smallest position of deformation performance are determined as the hoisting point position used, right
The vertical displacement answered is the pre- springing quantum of large-span truss.
4. the construction method of large span high-altitude three-dimensional canopy of the heavens steel construction according to claim 1, it is characterised in that:
The threedimensional model of the stereochemical structure of Pressures On Complex Large-span degree high-altitude three-dimensional canopy of the heavens steel construction to embody component integral form,
It is segmented situation, specification, model, size, connection method, pre- springing quantum.
5. the construction method of large span high-altitude three-dimensional canopy of the heavens steel construction according to claim 1, it is characterised in that:
It is described that factory's rod piece is instructed to be processed as threedimensional model combining progress rod piece processing and fabricating with three-dimensional automatic gas cutting machine.
6. the construction method of large span high-altitude three-dimensional canopy of the heavens steel construction according to claim 1, it is characterised in that:
The three-dimensional space tubular truss assembly moulding bed includes multiple support units disposed in parallel and each support unit of connection
Vertical equity beam；The support unit includes pedestal, is successively arranged left support column, left support bar, the right side on pedestal from left to right
Support rod, right support column；The pedestal, left support column, left support bar, right support bar, right support column are equipped with bolt
Connecting hole, bolt pass through bolt connecting hole and left support column, left support bar, right support bar, right support column are fixed on pedestal
On；When needing to change the width of three-dimensional space tubular truss, mobile left support column, left support bar, right support bar, right support are vertical
The adjustment of three-dimensional space tubular truss width is realized in the position of column on the base；The left support column is equipped with left support joist,
Bolt passes through bolt connecting hole and left support joist is fixed on left support column；The right support column is equipped with right support support
Beam, bolt pass through bolt connecting hole and right support joist are fixed on right support column；On left support joist, right support joist
If moveable snap-gauge；When needing to change the absolute altitude of three-dimensional space tubular truss, mobile left support joist is on left support column
Position, the adjustment of three-dimensional space tubular truss absolute altitude is realized in and position of the mobile right support joist on right support column；Institute
It states crossbeam, left support joist, be respectively equipped with fine tuning backing plate on right support joist；The two sides of the different supporting unit are respectively equipped with
Two vertical equity beams are located at the lower part and middle part of each support unit.
7. the construction method of large span high-altitude three-dimensional canopy of the heavens steel construction according to claim 1, it is characterised in that:
It is described that carry out space orientation measurement in such a way that total station and threedimensional model combine applied by obtaining three-dimensional model
The point of accurate coordinates required for work and elevation, cooperation total station carry out three dimension location measurement, control steel column, truss absolute altitude,
Truss verticality improves steel structural overhead installation accuracy.
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| CN111794522A (en) * | 2020-06-15 | 2020-10-20 | 中建三局第三建设工程有限责任公司 | Construction method of large-span high-altitude steel structure |
| CN113833020A (en) * | 2021-09-30 | 2021-12-24 | 中铁四局集团第五工程有限公司 | Construction method of large fish belly type inclined column structure in underground space |
| CN113833020B (en) * | 2021-09-30 | 2022-11-01 | 中铁四局集团第五工程有限公司 | Construction method of large fish belly type inclined column structure in underground space |
| CN115404994A (en) * | 2022-10-21 | 2022-11-29 | 中建八局第二建设有限公司 | Construction method of irregular curve space three-dimensional truss system of super-large-span building |
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