CN110158774A - A kind of construction method that large span grid double-machine lifting crane subregion closes up - Google Patents
A kind of construction method that large span grid double-machine lifting crane subregion closes up Download PDFInfo
- Publication number
- CN110158774A CN110158774A CN201910546535.1A CN201910546535A CN110158774A CN 110158774 A CN110158774 A CN 110158774A CN 201910546535 A CN201910546535 A CN 201910546535A CN 110158774 A CN110158774 A CN 110158774A
- Authority
- CN
- China
- Prior art keywords
- rack
- installation
- construction
- crane
- ground
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
-
- 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
- E04B1/35—Extraordinary methods of construction, e.g. lift-slab, jack-block
-
- 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
- E04B1/35—Extraordinary methods of construction, e.g. lift-slab, jack-block
- E04B1/3511—Lift-slab; characterised by a purely vertical lifting of floors or roofs or parts thereof
Abstract
The invention discloses a kind of construction methods that large span grid double-machine lifting crane subregion closes up, the installation of production and rack including rack, the production of the rack include: rod piece production, and -- -- rest makes for Hexagonal jacket production -- sealing plate and conehead make -- for bolt sphere production；The installation general sequence of the rack is as follows: first ground carries out cross assembling, and integral hoisting, overhead connection lift to form cross shape, remainder high altitude bulk；Has region establishment officer's construction simultaneously of construction and installation condition at the scene；It is divided according to construction area and subregion stacking is carried out to component；It specifically includes: installation on ground arrangement and method for construction and -- divides -- lifting sequence -- hanging method -- high altitude bulk arrangement and method for construction -- the unit rack installation quality security control of pre- lifting region.The present invention, which interts to intersect in the links such as production, transport, construction and installation, to be carried out, and configuration is optimized to the progress in each stage, personnel placement, material resources.
Description
Technical field
The invention belongs to the realm of building construction, and in particular to a kind of construction party that large span grid double-machine lifting crane subregion closes up
Method.
Background technique
Production and construction content is more, and structure is complicated, has special requirement, construction production to the assembly of rack, welding, lifting
Each process is staggeredly many and diverse, the links such as main production, transport, installation including rack system.Engineering structure is complicated, scene peace
It is high to fill difficulty, it is desirable that production, transport, installation synchronous coordination, which intersect, to carry out, it is ensured that duration of a project quality is met the requirements.
Summary of the invention
Goal of the invention: in order to solve the deficiencies in the prior art, the present invention provides a kind of large span grid double-machine lifting cranes point
The construction method that area closes up.
Technical solution: a kind of construction method that large span grid double-machine lifting crane subregion closes up, production and net including rack
The installation of frame, specific steps are as follows: the production of the rack includes the following steps: that rod piece makes -- bolt sphere production --
Rest makes for Hexagonal jacket production -- sealing plate and conehead make --；Wherein:
The rod piece production: steel pipe blanking carries out on band sawing machine and dedicated pipe cutting machine, then welds with conehead, sealing plate
It connects；Before welding, length scaling is carried out on dedicated positioning welding mould, and controls the distance of both ends of the surface, steel pipe concentricity and cone
Head, sealing plate end face verticality；Spot welding positioning is carried out after clamp；Rod length control errors are within 1mm, conehead or envelope
Board ends control within 0.2mm in face of steel pipe axis vertical error, continue workshop inspection and semi-finished product after rod piece welding
It examines in warehouse；The control of rod piece welding quality guarantees that weld seam has enough height and the width from technique first, weld seam can sufficiently with
Base material fusion, according to weld seam difference, weld seam divides 2-3 completion, and each postwelding is examined by inspector, and welding defect continues to weld
It connects, postwelding beats welder's steel seal, and weld inspection carries out nondestructive inspection using GTS-22 type and GTS-12 type supersonic detector, often
Type shape carries out finished product failure test, and no less than 3 groups by 3% sampling, while by city's building work engineering quality supervision station sampling observation
And provide report；Rod piece reaches Sa2.5 grades of requirements using derusting by sandblasting, carries out brushing anti-corrosive primer after derusting immediately；
The installation general sequence of the rack is as follows: first ground carries out cross assembling, and integral hoisting, overhead connection are hung
Dress forms cross shape, remainder high altitude bulk；The region while establishment officer for having construction and installation condition at the scene are applied
Work；It is divided according to construction area and subregion stacking is carried out to component；Specifically comprise the following steps: installation on ground arrangement and method for construction -- it divides
-- lifting sequence -- hanging method -- high altitude bulk arrangement and method for construction -- the unit rack installation quality security control of pre- lifting region；
The installation on ground arrangement and method for construction:
Stock: after rack components transport construction site under the premise of getting ready work, construction team member divides every team point
Three groups, one group is unloaded；One group of classification, haul；It is numbered according to construction drawing for one group and installation on ground is carried out to rack components
Combination, while classification stacking is carried out to cargo according to construction area division, various specifications are listed, for finding when construction；
It extracts one group of 4 people out therefrom after the completion to look for material personnel, looks for material staffing should be through entire Construction of The Grids process, to guarantee to be equipped with
Good material；
Installation on ground: installation personnel is divided into each 8~15 people of two teams, and every team is divided into ground, high-altitude Liang Ge group, ground group
It is divided into spelling conelet unit, ground assembling and looking for and expects several work posts, each hilllock personnel mutually coordinated completion under the unified leadership of group leader
The assembly of junior unit；
The hanging method:
Hoistman is first asked to carry out the inspection of the scene of a crime before lifting, rack elder generation installation on ground is good, and checks the fastening of each bolt
Degree, it is ensured that each bolt fastening carries out overall dimensions measurement in place, to assembled good rack to be lifted, it is ensured that rack totality ruler
Very little errorless, crane arrives first lifting optimum position, selects suspension centre according to grid structure and loading characteristic；
Suspension centre selection is preferably selected in rack center of gravity symmetric points, and stable structure is unsuitable too far away from crane position, when lifting by crane in this way
It just can ensure that rack balances, rod piece should not deform, and crane reaches requirement；After suspension centre chooses, metal binding wire rope,
Rack four corners bind mark rope, put together and confide a technological secret to hoistman and staff before lifting, clarification in certain roles,
Unified command, everyone start to lift by crane in place afterwards；
When lifting, cable wind rope is bound at four angles of rack, and crane stops being promoted when first promoting about 2.5m from the ground, makes each suspension centre
At this moment balance checks each suspension centre fastening after rack stress balance, whether there is or not bending deformations for rod piece, and then each group is rapidly by bolumn cap
Part is assembled in place, and after inspection is all gone well, four cranes are promoted simultaneously again, and when promotion, each angle point sent someone to observe sling height,
Guarantee that promotion speed is consistent, arrives designed elevation until being promoted；Designed elevation is promoted after rack balance, four cranes are same simultaneously
To translation, net rack support is made to be moved to supporting point position, after net rack support middle line and pillar axis to after just, under crane rope
It falls, rack is in place.
As optimization: the bolt sphere production: bolt sphere finishing carries out on CA6140 lathe, sequence are as follows: first
Positioning clamps blank ball, then rotates index dial and processes each chord member hole, last rotary clamp processes each web member hole；The rotation of fixture
Deviations are ± 5 °, ensure that the angle error of each threaded hole controls within ± 5 °, after processing, with angle scale, bevel protractor
Angle detection is carried out with plug；Screw thread hole end surface, with ball center distance D, franchise is+0.2mm, D>150mm in D<150mm
When, it is+0.26mm, with height gauge, plug, vernier caliper is detected.
As optimization: the described Hexagonal jacket production: the 150Kg pneumatic hammer die forging of the Hexagonal jacket of M30 or more, M30 with
It is down hot investment casting.The finishing of Hexagonal jacket is processed on CA6140 lathe, and both ends of the surface parallel misalignment is not more than 0.5mm.
As optimization: the sealing plate and conehead makes: using Q235-A steel, blank is ground by 150Kg pneumatic hammer and 300T
Wipe press machine die forging form, the finishing of sealing plate and conehead is processed on CA6140 lathe, scroll chuck clamp end face and
Inner hole, both ends of the surface parallel misalignment are not more than 0.3mm.
As optimization: the rest production: post is made of round steel pipe, and support plate uses 200 × 10mm of φ steel
Production is pulled, steel pulls periphery lathe process or pestal grinding, guarantees neat in edge.
As optimization: in the lifting sequence, network frame hoisting is total in two steps: the first step, point five part ground assemble 3-4
Axis carries out integral hoisting after the completion, overhead connection forms firm entirety；Second step divides five part ground to assemble 4-10/D-E again
Shaft portion docks to form cross shape, remainder high altitude bulk with original lifting part.
As optimization: the high altitude bulk arrangement and method for construction: after rack material to be assembled into the junior unit of four bar of a ball,
One group of 5 people of high altitude bulk personnel is responsible for junior unit being installed to design position under the cooperation of 20T crane.
As optimization: the unit rack installation quality security control is as follows: this engineering rack according to quality, safety,
The requirement such as progress and economy, in conjunction with site operation technology and field condition, it is determined as first installation on ground forms a geometry unchanged body
After system, four large tonnage crane liftings are in place, complete integral hoisting；It is dissipated in assembled junior unit progress high-altitude in the air by slitting of winding up again
Dress；It is positioned simultaneously with theodolite, when rack is often installed to supporting-point, by responsible rack installation quality on bearing position
Inspection personnel exercises supervision to net rack support seated position, as deviation is excessive should ascertain the reason after corrected, guarantee rack branch
Seat center is directed at column foundation axial location, prevents rack mounting axis error excessive；To prevent installation amount of deflection excessive, in installation
In whole process, add reliable temporary support at the rack lower-chord panel point of not formed rigidity unit, after rigidity unit to be formed
It removes；Rack completes the installation of an integral unit, then carries out next unit rack installation.
As optimization: the axial location of necessary repetition measurement pillar, absolute altitude before installation, and net rack support is guided at benchmark control point
Guarantee that net rack support middle line and axis are overlapped on steel column, when installation, the installation of especially first piece rack is played and stablized and positioning
Effect is more it is ensured that support middle line and axis are overlapped, and every pillar checks whether net rack support deviates later, such as offsets
Reason is analyzed in time and is corrected, it is ensured that reaches installation accuracy requirement；To guarantee safety, each junior unit is first interim with specific purpose tool
Fixed row lifting again；Since grid is big, rod piece is long, for guarantee high-altitude personnel safety, the safety belt of high altitude operation personnel must
It must be buckled on mounted fixed beam；Safe to guarantee, lower part and periphery should draw safety necessary to set to go along with sb. to guard him；Construction personnel is tight
Prohibit station surface construction under installation region, to ensure safety.
The utility model has the advantages that the present invention claims system engineerings must intert friendship in the links such as production, transport, construction and installation
Fork carries out, and scientific and careful schedule is worked out to each stage, and personnel placement plan provides available man-power, material resources in factory
Source optimizes configuration, supervision of strengthening management, under the premise of guaranteeing to complete engineering by the duration as defined in owner, it is ensured that construction matter
Amount is primary qualified.
Detailed description of the invention
Fig. 1 is whole lifting structure schematic diagram of the invention；
Fig. 2 is lifting sequence floor map of the invention.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, so that the technology of this field
Personnel can better understand advantages and features of the invention, to make apparent boundary to protection scope of the present invention
It is fixed.Embodiment described in the invention is only a part of the embodiment of the present invention, instead of all the embodiments, based on the present invention
In embodiment, those of ordinary skill in the art's every other implementation obtained without making creative work
Example, shall fall within the protection scope of the present invention.
Embodiment
One, the fabrication and installation of rack
(1) rod piece makes
Steel pipe blanking carries out on band sawing machine and dedicated pipe cutting machine, then with conehead, seal plate welding.Before welding, dedicated
Length scaling is carried out on positioning welding mould, and control the distance of both ends of the surface, steel pipe concentricity and conehead, sealing plate end face it is vertical
Degree.Spot welding positioning is carried out after clamp.Rod length control errors are within 1mm.Conehead or sealing plate both ends of the surface are to steel pipe axis
Line vertical error controls within 0.2mm, continues workshop inspection after rod piece welding and semi-finished product warehouse is examined.Rod piece welding
Quality control, guarantees that weld seam has enough height and the width, weld seam can be merged sufficiently with base material from technique first.According to weld seam
Difference, weld seam divide 2-3 completion, and each postwelding is examined by inspector, and welding defect continues to weld, and postwelding breaks welder's steel
Print.Weld inspection carries out nondestructive inspection using GTS-22 type and GTS-12 type supersonic detector.Every type shape by 3% (and not
Less than 3 groups) sampling carries out finished product failure test, while being inspected by random samples by city's building work engineering quality supervision station and providing report.Bar
Part reaches Sa2.5 grades of requirements using derusting by sandblasting, carries out brushing anti-corrosive primer after derusting immediately.
(2) bolt sphere makes
Bolt sphere finishing carries out on CA6140 lathe, program are as follows: positioning clamps blank ball first, then rotation indexing
Disk processes each chord member hole, and last rotary clamp processes each web member hole.The rotational positioning deviation of fixture is ± 5 °, ensure that each screw thread
Hole angle error control (be defined as franchise ± 20 ° by GJ7-91) within ± 5 °, after processing, with angle scale, bevel protractor and
Plug carries out angle detection.Hole processing precision is according to " 6H " (JGG7-91K in GBG7-81 " Metric Thread's Tolerance and cooperation "
In be defined as meet three class precisions).Screw thread hole end surface, with ball center distance D, franchise is+0.2mm in D<150mm, D>
It is+0.26mm, with height gauge, plug, vernier caliper is detected when 150mm.
(3) Hexagonal jacket makes
The 150Kg pneumatic hammer die forging of the Hexagonal jacket of M30 or more, the following are hot investment castings by M30.The finishing of Hexagonal jacket
It is processed on CA6140 lathe, both ends of the surface parallel misalignment is not more than 0.5mm (no requirement (NR) in JGJ7-91).
(4) sealing plate and conehead make
Using Q235-A steel, blank is formed by 150Kg pneumatic hammer and 300T friction press die forging.The essence of sealing plate and conehead
Processing is processed on CA6140 lathe, and scroll chuck clamps end face and inner hole.Both ends of the surface parallel misalignment is not more than
0.3mm, (JGJ7-91 no requirement (NR)).
(5) rest makes
Post is made of round steel pipe, and support plate pulls production using 200 × 10mm of φ steel, and steel pulls periphery lathe process
Or pestal grinding, guarantee neat in edge.
Two, the installation of rack
(1) preparatory work before installation
A. the installation measurement result of concrete column is checked, and recorded, confirm errorless and approved through supervisor and hand over
It connects.
B. rod piece is classified: the principle that rod piece is facilitated to memory according to the distribution situation of rod piece in construction drawing, facilitates construction
Subregion is put.
C. construction teams and groups arrange: according to Engineering Task face and progress situation, group of rationally putting into several classes, various processes are connected.
D. mounting technique, the work of telling somebody what one's real intentions are of mounting process and secure context mainly the training of hoistman: are carried out to driver
Make.Accomplish know what's what, good teamwork.
E. welder, play the special work posts training such as heavy industry and confide a technological secret.
(2) overall installation sequence
Overall installation sequence combines field condition to carry out, and general sequence is as follows: first ground carries out cross assembling, whole
Lifting, overhead connection lift to form cross shape, remainder high altitude bulk；Has the region of construction and installation condition at the scene
Establishment officer's construction simultaneously；It is divided according to construction area and subregion stacking is carried out to component.
Three, rack installs Specific construction scheme
(1) installation on ground arrangement and method for construction
Stock: after rack components transport construction site under the premise of getting ready work, construction team member divides every team point
Three groups, one group is unloaded；One group of classification, haul；It is numbered according to construction drawing for one group and installation on ground is carried out to rack components
It combines (such as connection without line nut and high-strength bolt), while classification stacking is carried out to cargo according to construction area division, respectively
Kind specification is listed, for finding when construction；It extracts one group of 4 people out therefrom after the completion to look for material personnel, material staffing is looked for answer
Through entire Construction of The Grids process, material is got ready to guarantee to match.
Installation on ground: installation personnel is divided into each 8~15 people of two teams, and every team is divided into ground, high-altitude Liang Ge group, ground group
It is divided into and spells conelet unit, ground assembling and look for the several work posts of material, each one does his duty under the unified leadership of group leader by each hilllock personnel, mutually
Coordinate the assembly of completion junior unit.
(2) pre- lifting region is divided
By taking rack one as an example, rack integral hoisting part is divided into 10 pieces, is distributed as shown in Fig. 1 integral hoisting figure.
(3) lifting sequence
Network frame hoisting is total in two steps:
The first step, point five part ground assemble 3-4 axis, carry out integral hoisting after the completion, overhead connection forms firm entirety.
Second step divides five part ground to assemble 4-10/D-E shaft portion again, docks to form crux with original lifting part
Shape, remainder high altitude bulk.Hoisting Program is as shown in Fig. 2 lifting sequence floor map.
(4) hanging method
Hoistman is first asked to carry out the inspection of the scene of a crime before lifting.Rack elder generation installation on ground is good, and checks the fastening of each bolt
Degree, it is ensured that each bolt fastening is in place.Overall dimensions measurement is carried out to assembled good rack to be lifted, it is ensured that rack totality ruler
It is very little errorless.Crane arrives first lifting optimum position, selects suspension centre according to grid structure and loading characteristic.
Suspension centre selection is preferably selected in rack center of gravity symmetric points, and stable structure is unsuitable too far away from crane position, when lifting by crane in this way
It just can ensure that rack balances, rod piece should not deform, and crane reaches requirement.After suspension centre chooses, metal binding wire rope,
Mark rope is bound in rack four corners.Hoistman and staff are put together before lifting and confided a technological secret, is clearly divided
Work, unified command.Everyone starts to lift by crane in place afterwards.When lifting, cable wind rope is bound at four angles of rack.Crane is first promoted from the ground
Stop being promoted when about 2.5m, balances each suspension centre.At this moment each suspension centre fastening is checked after rack stress balance, whether there is or not bendings for rod piece
Deformation, then each group is assembled in place by bolumn cap part rapidly.After inspection is all gone well, four cranes are promoted simultaneously again.It is promoted
When each angle point send someone to observe sling height, guarantee to promote speed consistent, arrive designed elevation until being promoted.Designed elevation is promoted to wait for
After rack balance, the translation in the same direction simultaneously of four cranes makes net rack support be moved to supporting point position, to net rack support middle line and column
To after just, crane rope falls sub- axis, and rack is in place.
(5) high altitude bulk arrangement and method for construction
After rack material to be assembled into the junior unit of four bar of a ball, 5 people one of high altitude bulk personnel under the cooperation of 20T crane
Group is responsible for junior unit being installed to design position.
(6) unit rack installation quality security control
Rack of the invention is required according to quality, safety, progress and economy etc., in conjunction with site operation technology and live item
Part, it is determined as first installation on ground, after forming a geometrically stable system, four large tonnage crane liftings are in place, complete integral hoisting；
By slitting of winding up, assembled junior unit carries out high altitude bulk in the air again.It is positioned simultaneously with theodolite, when rack is often installed to supporting-point,
It by the inspection personnel of a responsible rack installation quality on bearing position, exercises supervision to net rack support seated position, such as partially
Difference it is excessive should ascertain the reason after corrected, guarantee net rack support center be aligned column foundation axial location, prevent rack installation axle
Line error is excessive.To prevent installation amount of deflection excessive, during the entire process of installation, the chord joint under the rack of not formed rigidity unit
Add reliable temporary support at point, is withdrawn from after rigidity unit to be formed.
Rack of the invention completes the installation of an integral unit, then carries out next unit rack installation.
The present invention in a pre-installation must the axial location of repetition measurement pillar, absolute altitude, and net rack support is guided at benchmark control point
Guarantee that net rack support middle line and axis are overlapped on steel column, when installation, the installation of especially first piece rack is played and stablized and positioning
Effect is more it is ensured that support middle line and axis are overlapped, and every pillar checks whether net rack support deviates later, such as offsets
Reason is analyzed in time and is corrected, it is ensured that reaches installation accuracy requirement.To guarantee safety, each junior unit is first interim with specific purpose tool
Fixed row lifting again.Since grid is big, rod piece is long, for guarantee high-altitude personnel safety, the safety belt of high altitude operation personnel must
It must be buckled on mounted fixed beam.Safe to guarantee, lower part and periphery should draw safety necessary to set to go along with sb. to guard him；Construction personnel is tight
Prohibit station surface construction under installation region, to ensure safety.
Claims (9)
1. a kind of construction method that large span grid double-machine lifting crane subregion closes up, it is characterised in that: production and net including rack
The installation of frame, specific steps are as follows: the production of the rack includes the following steps: that rod piece makes -- bolt sphere production --
Rest makes for Hexagonal jacket production -- sealing plate and conehead make --；Wherein:
The described rod piece production: steel pipe blanking carries out on band sawing machine and dedicated pipe cutting machine, then with conehead, seal plate welding；Weldering
Before connecing, length scaling is carried out on dedicated positioning welding mould, and controls the distance of both ends of the surface, steel pipe concentricity and conehead, envelope
The verticality of plate end face；Spot welding positioning is carried out after clamp；Rod length control errors are within 1mm, conehead or sealing plate two
End face controls within 0.2mm steel pipe axis vertical error, continues workshop inspection and semi-finished product warehouse after rod piece welding
It examines；The control of rod piece welding quality guarantees that weld seam has enough height and the width from technique first, and weld seam can sufficiently and base material
Fusion, according to weld seam difference, weld seam divides 2-3 completion, and each postwelding is examined by inspector, and welding defect continues to weld,
Postwelding beats welder's steel seal, and weld inspection carries out nondestructive inspection using GTS-22 type and GTS-12 type supersonic detector, and every kind
Class shape carries out finished product failure test, and no less than 3 groups by 3% sampling, while simultaneously by city's building work engineering quality supervision station sampling observation
Provide report；Rod piece reaches Sa2.5 grades of requirements using derusting by sandblasting, carries out brushing anti-corrosive primer after derusting immediately；
The installation general sequence of the rack is as follows: first ground carries out cross assembling, and integral hoisting, overhead connection lift shape
At cross shape, remainder high altitude bulk；Has region establishment officer's construction simultaneously of construction and installation condition at the scene；According to
It is divided according to construction area and subregion stacking is carried out to component；Specifically comprising the following steps: installation on ground arrangement and method for construction -- division is hung in advance
Fill region -- lifting sequence -- hanging method -- high altitude bulk arrangement and method for construction -- unit rack installation quality security control；
The installation on ground arrangement and method for construction:
Stock: after rack components transport construction site under the premise of getting ready work, construction team member divides three groups of every team point,
One group is unloaded；One group of classification, haul；It is numbered according to construction drawing for one group and installation on ground combination is carried out to rack components,
Classification stacking is carried out to cargo according to construction area division simultaneously, various specifications are listed, for finding when construction；After the completion
It extracts one group of 4 people out therefrom to look for material personnel, looks for material staffing that should get object ready through entire Construction of The Grids process to guarantee to match
Material；
Installation on ground: installation personnel is divided into each 8~15 people of two teams, and every team is divided into ground, high-altitude Liang Ge group, and ground group is divided into
It spells conelet unit, ground assembling and looks for the several work posts of material, each hilllock personnel are mutually coordinated under the unified leadership of group leader to complete small list
The assembly of member；
The hanging method:
Hoistman is first asked to carry out the inspection of the scene of a crime before lifting, rack elder generation installation on ground is good, and checks the tightness of each bolt,
Ensure each bolt fastening in place, overall dimensions measurement carried out to assembled good rack to be lifted, it is ensured that rack overall dimension without
Accidentally, crane arrives first lifting optimum position, selects suspension centre according to grid structure and loading characteristic；
Suspension centre selection is preferably selected in rack center of gravity symmetric points, and stable structure is unsuitable too far away from crane position, could when lifting by crane in this way
Ensure that rack balances, rod piece should not deform, and crane reaches requirement；After suspension centre chooses, metal binding wire rope, in rack
Four corners bind mark rope, put together and confide a technological secret to hoistman and staff before lifting, and clarification in certain roles is unified
Commander, everyone start to lift by crane in place afterwards；
When lifting, cable wind rope is bound at four angles of rack, and crane stops being promoted when first promoting about 2.5m from the ground, keeps each suspension centre flat
At this moment weighing apparatus checks each suspension centre fastening after rack stress balance, whether there is or not bending deformations for rod piece, and then each group is rapidly by bolumn cap portion
Point assembled in place, after inspection is all gone well, four cranes are promoted simultaneously again, and when promotion, each angle point sent someone to observe sling height, guarantor
It is consistent that card promotes speed, until being promoted to designed elevation；Designed elevation is promoted after rack balance, four cranes are in the same direction simultaneously
Translation, makes net rack support be moved to supporting point position, after net rack support middle line and pillar axis to after just, under crane rope
It falls, rack is in place.
2. the construction method that large span grid double-machine lifting crane subregion according to claim 1 closes up, it is characterised in that: described
Bolt sphere production: bolt sphere finishing carried out on CA6140 lathe, sequence are as follows: first positioning clamp blank ball, then turn
Dynamic index dial processes each chord member hole, and last rotary clamp processes each web member hole；The rotational positioning deviation of fixture is ± 5 °, be ensure that
The angle error of each threaded hole controls within ± 5 °, after processing, carries out angle detection with angle scale, bevel protractor and plug；Spiral shell
Pit end face, and ball center distance D, franchise are+0.2mm in D<150mm, are+0.26mm when D>150mm, with height gauge,
Plug, vernier caliper are detected.
3. the construction method that large span grid double-machine lifting crane subregion according to claim 1 closes up, it is characterised in that: described
Hexagonal jacket production: the 150Kg pneumatic hammer die forging of the Hexagonal jacket of M30 or more, the following are hot investment castings by M30.Hexagonal jacket
Finishing processed on CA6140 lathe, both ends of the surface parallel misalignment be not more than 0.5mm.
4. the construction method that large span grid double-machine lifting crane subregion according to claim 1 closes up, it is characterised in that: described
Sealing plate and conehead make: use Q235-A steel, blank forms by 150Kg pneumatic hammer and 300T friction press die forging, sealing plate
Finishing with conehead is processed on CA6140 lathe, and scroll chuck clamps end face and inner hole, both ends of the surface parallel misalignment
No more than 0.3mm.
5. the construction method that large span grid double-machine lifting crane subregion according to claim 1 closes up, it is characterised in that: described
Rest production: post using round steel pipe make, support plate use 200 × 10mm of φ steel pull production, steel pulls periphery lathe
Processing or pestal grinding guarantee neat in edge.
6. the construction method that large span grid double-machine lifting crane subregion according to claim 1 closes up, it is characterised in that: described
Lifting sequence in, network frame hoisting altogether in two steps: the first step, point five part ground assemble 3-4 axis, carry out whole hangs after the completion
Dress, overhead connection form firm whole；Second step divides five part ground to assemble 4-10/D-E shaft portion again, lifts part with original
Docking forms cross shape, remainder high altitude bulk.
7. the construction method that large span grid double-machine lifting crane subregion according to claim 1 closes up, it is characterised in that: described
High altitude bulk arrangement and method for construction: after rack material to be assembled into the junior unit of four bar of a ball, under the cooperation of 20T crane high-altitude dissipate
One group of 5 people of dress personnel is responsible for junior unit being installed to design position.
8. the construction method that large span grid double-machine lifting crane subregion according to claim 1 closes up, it is characterised in that: described
Unit rack installation quality security control it is as follows: this engineering rack is required according to quality, safety, progress and economy etc., in conjunction with
Site operation technology and field condition, it is determined as first installation on ground, after forming a geometrically stable system, four large tonnage cranes are hung
Dress is in place, completes integral hoisting；By slitting of winding up, assembled junior unit carries out high altitude bulk in the air again；It is positioned simultaneously with theodolite,
When rack is often installed to supporting-point, by the inspection personnel of a responsible rack installation quality on bearing position, to net rack support
Seated position exercises supervision, as deviation is excessive should ascertain the reason after corrected, guarantee net rack support center be aligned column foundation axis
Line position prevents rack mounting axis error excessive；To prevent installation amount of deflection excessive, during the entire process of installation, in non-shape
At reliable temporary support is added at the rack lower-chord panel point of rigidity unit, withdrawn from after rigidity unit to be formed；Rack completes one
The installation of integral unit, then carry out next unit rack installation.
9. the construction method that large span grid double-machine lifting crane subregion according to claim 1 closes up, it is characterised in that: installation
The axial location of preceding necessary repetition measurement pillar, absolute altitude, and benchmark control point is guided on net rack support steel column, when installation, guarantee rack
Support middle line and axis are overlapped, the installation of especially first piece rack, play stable and positioning action more it is ensured that support middle line
It is overlapped with axis, every pillar checks whether net rack support deviates later, such as offsets analysis reason in time and corrects, really
Guarantor reaches installation accuracy requirement；To guarantee safety, each junior unit is first fixed temporarily row lifting again with specific purpose tool；Due to grid
Greatly, rod piece is long, for the safety for guaranteeing high-altitude personnel, must be buckled in mounted fixed beam in the safety belt of high altitude operation personnel
On；Safe to guarantee, lower part and periphery should draw safety necessary to set to go along with sb. to guard him；Construction personnel forbids station to apply below installation region
Work, to ensure safety.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910546535.1A CN110158774A (en) | 2019-06-24 | 2019-06-24 | A kind of construction method that large span grid double-machine lifting crane subregion closes up |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910546535.1A CN110158774A (en) | 2019-06-24 | 2019-06-24 | A kind of construction method that large span grid double-machine lifting crane subregion closes up |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110158774A true CN110158774A (en) | 2019-08-23 |
Family
ID=67626715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910546535.1A Pending CN110158774A (en) | 2019-06-24 | 2019-06-24 | A kind of construction method that large span grid double-machine lifting crane subregion closes up |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110158774A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112411760A (en) * | 2020-11-10 | 2021-02-26 | 上海宝冶集团有限公司 | Construction method for integrally hoisting and combining cantilever installation of head unit |
| CN115233830A (en) * | 2022-05-18 | 2022-10-25 | 中交第三航务工程局有限公司江苏分公司 | Construction method of net rack starting unit for middle lifting arch |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0490483A1 (en) * | 1990-12-08 | 1992-06-17 | Kubik, Leszek Aleksander | Space frame structure |
| CN101988308A (en) * | 2010-09-30 | 2011-03-23 | 中国华西企业有限公司 | Non-support installation method of long-span spatial bolt ball steel reticulated shell dome |
| CN107524261A (en) * | 2017-09-14 | 2017-12-29 | 中铁上海工程局集团第五工程有限公司 | A kind of construction method of roofing Elements of Space Grid Truss |
-
2019
- 2019-06-24 CN CN201910546535.1A patent/CN110158774A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0490483A1 (en) * | 1990-12-08 | 1992-06-17 | Kubik, Leszek Aleksander | Space frame structure |
| CN101988308A (en) * | 2010-09-30 | 2011-03-23 | 中国华西企业有限公司 | Non-support installation method of long-span spatial bolt ball steel reticulated shell dome |
| CN107524261A (en) * | 2017-09-14 | 2017-12-29 | 中铁上海工程局集团第五工程有限公司 | A kind of construction method of roofing Elements of Space Grid Truss |
Non-Patent Citations (4)
| Title |
|---|
| 冯瑞丽,郭再民: "复杂环境条件下的复杂钢结构综合施工技术", 《建筑施工》 * |
| 张新志: "大直径不规则支点圆形平板网架施工", 《大科技·科技天地》 * |
| 王华: "某冲焊联合厂房钢结构工程施工技术应用分析", 《低碳世界》 * |
| 靳荣耀: "钢网架安装", 《天津贯庄卸车平台网架施工组织设计》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112411760A (en) * | 2020-11-10 | 2021-02-26 | 上海宝冶集团有限公司 | Construction method for integrally hoisting and combining cantilever installation of head unit |
| CN112411760B (en) * | 2020-11-10 | 2022-08-09 | 上海宝冶集团有限公司 | Construction method for integrally hoisting and combining cantilever installation of head unit |
| CN115233830A (en) * | 2022-05-18 | 2022-10-25 | 中交第三航务工程局有限公司江苏分公司 | Construction method of net rack starting unit for middle lifting arch |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101967886B (en) | Assembly and installation methods of steel containment vessel of nuclear power station | |
| CN101691787B (en) | Converse construction process for middle-high steel structure building | |
| CN103541474B (en) | Top and bottom process makes the construction method of hyperboloid stainless steel curtain wall | |
| CN109441127A (en) | A kind of virtual emulation in-site installation construction method across overhanging steel structure greatly | |
| CN106695252A (en) | Method for manufacturing main body structure of wind turbine tower | |
| US11629033B2 (en) | Integral lifting system and lifting method for assembled members | |
| CN102296858B (en) | Roof steel structure for cement production line clinker warehouse and construction method thereof | |
| CN110158774A (en) | A kind of construction method that large span grid double-machine lifting crane subregion closes up | |
| CN101323351A (en) | Shipping rudder system lighting and mounting method | |
| CN103265066B (en) | Making and construction method of chlorination furnace | |
| CN109079437A (en) | Large size liquefied gas storage multilayer limb end socket arrangement and method for construction peculiar to vessel | |
| CN107717346A (en) | A kind of 1600T masts hang on mast building technology | |
| CN111730349A (en) | Production process of tenon type standard knot main chord member | |
| CN110306782A (en) | Reactor building shell dome template and its assembling and construction method | |
| CN111335178A (en) | Small-curve-radius steel box girder bridge girder erection machine and erection construction method | |
| CN211568250U (en) | Shafting positioning device for ship repair and construction | |
| CN114855991A (en) | Folding method suitable for large-span arched steel structure building | |
| CN205443895U (en) | Modular shelter bridge | |
| CN104590487B (en) | A kind of working ship is with large-scale stern cylinder flange disk high precision assembling and welding process | |
| CN107877093B (en) | Curved surface plate machining tool and machining method | |
| CN110116153B (en) | Cold bending manufacturing method for large-diameter steel pipe | |
| CN108237374A (en) | The three-shaft linkage processing method of multiple-blade runner curved surface | |
| CN105834272A (en) | Method for mounting large aluminum plate drawing mill equipment in confined space | |
| CN206399867U (en) | A kind of x-ray flaw detector fixed mount | |
| CN210480234U (en) | Welding type roller arm and welding positioning tool thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190823 |
|
| RJ01 | Rejection of invention patent application after publication |