CN110528891A - Large-span Spherical rack integral hoisting method - Google Patents
Large-span Spherical rack integral hoisting method Download PDFInfo
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- CN110528891A CN110528891A CN201910843298.5A CN201910843298A CN110528891A CN 110528891 A CN110528891 A CN 110528891A CN 201910843298 A CN201910843298 A CN 201910843298A CN 110528891 A CN110528891 A CN 110528891A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
- E04G21/162—Handles to carry construction blocks
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
- E04G21/163—Jacks specially adapted for working-up building elements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
- E04G21/18—Adjusting tools; Templates
- E04G21/1841—Means for positioning building parts or elements
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- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention discloses a kind of Large-span Spherical rack integral hoisting methods, the present invention uses integral hoisting, the mode that segmental hoisting combines lifts Large-span Spherical rack, upper layer rack, which winds up, passes through the setting-out of total station entirety on ground with lower edge, carry out integral assembling, the reserved value of springing height is carried out in assembled process, pass through more lifting equipments, whole promotion is carried out to upper layer rack, installation, utilize the superstructure formation operation platform of integral hoisting, substructure uses segmented assembly, segmental hoisting, connection, it is formed whole, reduce component in high altitude bulk, reduce scaffold dosage, reduce amount of high-altitude operation, construction safety, reliably, reduce construction risk, improve construction working efficiency, be conducive to the control of control and the safety in production of rack quality.
Description
Technical field
The invention belongs to technical field of building construction, and in particular to a kind of Large-span Spherical rack integral hoisting method.
Background technique
Under the fast development that construction industry is constantly increasingly innovated, requirement of the people to building is not limited to functionality, makes
With property, economy, more pursues unique appearance and modeling and require, reflect new era trend and building feature.Wherein greatly across
Spend space spherical net brace it is light-weight with its, rigidity is big, span is big, flexible arrangement, it is handsome in appearance, generous the features such as, depth by the modern times
The favor of building trade.
Currently, the installation method of large span space spherical net brace are as follows: first junior unit group weldering, then by junior unit handling to height
The site preparation of empty spelling carries out the high-altitude group weldering from outer to inner ring.One complete large span space spherical net brace, is related to
To thousands of a junior units, so that such hoisting process needs a large amount of scaffold cooperation, working efficiency is low, and applies
During work, the quality and safety in production of engineering not can guarantee.
Summary of the invention
The purpose of the present invention is to provide a kind of Large-span Spherical rack integral hoisting methods, to solve existing large span ball
Working efficiency is low existing for shape network frame hoisting process, not can guarantee the technical issues of quality and safety in production of engineering.
To achieve the above object, The technical solution adopted by the invention is as follows:
Large-span Spherical rack integral hoisting method, includes the following steps:
(1) surveying setting-out marks lower edge ball position using total station instrument coordinate setting-out；
(2) upper layer rack is assembled, disposes steel pipe moulding bed identical with sphere diameter in lower edge ball position, steel pipe moulding bed is high
Degree is arranged by maximum sphere away from ground 20cm, the assembled upper layer rack on steel pipe moulding bed；
(3) rack assembly in upper layer is checked and accepted, and using the weld seam of nondestructive inspection detection 50%, and checks overall appearance size and ball
Whether whether shape node with the camber of drawing position consistency, rack meet in-depth Design Requirement Drawing, carries out anti-corrosion after meeting
Processing, does not meet and is checked, changed according to step (2)~(3)；
(4) upper layer rack integral hoisting carries out preservative treatment after upper layer rack is qualified, then common using more cranes
Cooperate integral hoisting to support position, and in place by jack, jack thin portion, using total station, level meter, theodolite, red
Outside line rangefinder measures；
(5) upper layer rack fixed pivot welds with fixation upper wire valence and support after upper layer rack thin portion is in place
Upper layer rack, and carry out welding safeguard procedures；
(6) lower layer's rack segmented assembly lifts, and on upper layer, electric block is installed in the corresponding position of rack, passes through electric block
Each segmentation of lower layer's rack is lifted, fixed is fixed, and partial deviations are controlled using drawstring using falling afterwards in place for lifting；
(7) upper and lower level rack connects, and lower layer's network frame hoisting is in place and after fixing, and implements to be welded to connect upper and lower level using Hanging Basket
Rack, and welding safeguard procedures are carried out, setting exit passageway and anti-drop net below Hanging Basket；
(8) it checks and accepts and delivers, the deflection value for measuring rack, checks in supporting-point the vertically and horizontally side length deviation for checking rack
Each file involved in heart offset and height tolerance, weld seam and examination work progress using nondestructive inspection detection 50%,
It completes to deliver after qualification.
Preferably, in step (2), upper layer rack assembly process the following steps are included:
Step 1: lower limit sphere is installed on steel pipe moulding bed；
Step 2: it is connected between lower edge ball by lower boom, forms grid-like lower boom grid；
Step 3: each lower boom grid installation is connected the abdomen of the vertical top position of lower boom grid central point by four angles
Bar, and the ball that winds up is set on web member；
Step 4: being connected by top boom between the ball that winds up, form grid-like top boom grid, is assembled into relatively firm basic
Unit；
Step 5: weld together according to the basic unit that the content of step 1 to step 4 obtains.
Preferably, in step (2), reinforcing weldering first is carried out to node, first welds lower-chord panel point, then weld chord joint
Point, all welding use symmetrically and evenly welding.
Preferably, in step (4), upper layer rack integral hoisting utilizes crane weight display, hangs in advance in rack
When dress, steady state reads each crane hanging component weight, in lifting process, the weighing load of every crane is kept, to protect
Smoothness of the rack in whole lifting process is demonstrate,proved, when rack hoisting depth is more than 1 meter of target absolute altitude, then is moved horizontally, water
It puts down and is slowly put down after being moved to support position, then is in place by jack, jack thin portion.
Preferably, it in step (8), checks and accepts in standard of delivery, the amount of deflection average value surveyed is no more than design value
5%.
Preferably, it in step (8), checks and accepts in standard of delivery, vertically and horizontally side length deviation allowable value is the 1/ of length
2000, and it is not more than 30mm；Off-centring permissible value is the 1/3000 of rack span, and is not more than 30mm；Height tolerance allows
Value: being the 1/400 of adjacent support spacing, and be not more than 15mm, highest and minimum point between the rack consecutive points of periphery supporting
Between, it is 30mm；It is the 1/800 of adjacent support distance to the rack of multi-point support, and is not more than 30mm.
Preferably, it in step (8), checks and accepts the file delivered and be related to and includes: Construction of The Grids figure, as-built drawing, designs more
Change the quality certificate and test report of file, Design of Construction Organization, steel used and other materials；The components product of rack
The certificate of competency and test report, rack spell record of acceptance, welder qualification test verification of conformity, weldquality and the high intensity of shape each process
Bolt quality inspection data, total rear geometric dimension error and amount of deflection in place of spelling record.
Preferably, it in step (8), after nondestructive inspection detection is qualified, is delivered after carrying out preservative treatment by standard of delivery.
Compared with prior art, the invention has the following advantages:
1, the present invention is using lifting Large-span Spherical rack by the way of integral hoisting, segmental hoisting combination, on the rack of upper layer
String and lower edge, by the setting-out of total station entirety, carry out integral assembling, the reserved of springing height are carried out in assembled process on ground
Value carries out whole promotion, installation to upper layer rack by more lifting equipments, forms behaviour using the superstructure of integral hoisting
Make platform, substructure uses segmented assembly, and segmental hoisting, connection form entirety, reduces component in high altitude bulk, reduces
Scaffold dosage, reduces amount of high-altitude operation, construction safety, reliable, reduces construction risk, improves construction working efficiency, have
Conducive to the control of control and the safety in production of rack quality；
2, the present invention uses total station, level meter, theodolite, infrared ambulator, is controlled using ground permanent marks point
Nodes Three-dimensional space coordinate ensure that the installation accuracy of rack, be convenient for the high-level installation of rack.
3, the present invention mostly constructs in ground welding, is conducive to the control of weldquality, to ensure that the matter of rack installation
Amount；
4, the present invention uses rack Deepen Design, estimates rack deflection, controls rack degree of disturbing, and calculates springing height, subtracts
Few rack installation deformation.
Detailed description of the invention
Fig. 1 is flow diagram of the invention；
Fig. 2 is the scheme of installation of upper layer rack assembly step 1；
Fig. 3 is the scheme of installation of upper layer rack assembly step 2；
Fig. 4 is the scheme of installation of upper layer rack assembly step 3；
Fig. 5 is the scheme of installation of upper layer rack assembly step 4；
Fig. 6 is the scheme of installation of upper layer rack assembly step 5；
Fig. 7 is the scheme of installation of upper layer rack assembly step 6；
Fig. 8 is the scheme of installation of upper layer rack assembly step 7；
Fig. 9 is the scheme of installation of upper layer rack assembly step 8；
Figure 10 is the scheme of installation of upper layer rack assembly step 9；
Figure 11 is the scheme of installation of upper layer rack assembly step 10；
Figure 12 is the distribution of suspension centre vertical applied force and crane schematic diagram；
Figure 13 is suspension steel construction plane rod piece and ball node fragment figure.
Specific embodiment
Below with reference to each embodiment, the invention will be further described, and mode of the invention includes but are not limited to following reality
Apply example.
Embodiment 1
The present embodiment main structure is located at Sichuan and borders in the south between the Hong Kong Cinema area building Home Base 1A# Lou Yu 1B# from trade area river, main
It to be made of platen surface rack and suspension two parts of rack.Structure type are as follows: orthogonal spatial quadrangular pyramid plane grid, node class
Type is solder sphere.Supporting form are as follows: lower boom multi-point support.Entire rack is by 8 seat supports, branch tie distance: length direction
64.55m, width direction about 6.6m.Elements of Space Grid Truss mounting height 42.4m.
Elements of Space Grid Truss is profiled shape, maximum length 64.55m, maximum width 17.6m, maximum high 13.65m, practical covering surface
Product is 890 ㎡, belongs to large-span space structure, always weighs about 75 tons.Support pattern is lower edge multi-point support, upper layer rack rise
4.0m.Lower layer rack rise 9.65m.
One, preparation of construction is carried out before lifting:
1) steel construction Deepen Design drawing should scheme the batch production for carrying out component further according to in-depth after original design unit is agreed to
Processing.
2) component conveying scene carries out an acceptance inspection.Verify size, quantity, the specification of component of marching into the arena；Verify the number of component；Core
Look into the raw material quality quality certification, test report.
3) it works out special construction plan and confides a technological secret:
A, it should be answered using the mounting process for changing former design stress system, such as integral hoisting suspension centre, layering integral hoisting
Whether core needs local strengthening, and agrees to through original design unit.
B, such as belong to the danger large-engineering more than certain scale, special construction plan should also be by that can organize after being expounded through peer review
Implement.
4) preparation of construction personnel, equipment.
5) construction site uses the C30 concrete hardening of 200mm thickness, guarantees that foundation capability satisfaction in rack installation region is wanted
It asks.
Two, hoisting process is as shown in Figure 1, include the following steps:
(1) surveying setting-out: using total station, and Coordinate setting-out releases lower edge ball position, placement and sphere diameter phase
Same steel pipe moulding bed.
(2) upper layer rack is assembled:
Step 1: as shown in Figure 2, it is arranged and levelling platform, all lower edge ball positions are identical using sphere diameter
Steel pipe (wall thickness 10mm) as installation moulding bed, press maximum sphere and be arranged away from ground 20cm by steel pipe height；
Step 2: as shown in Figure 3, lower edge ball is installed；
Step 3: as shown in Figure 4, lower boom is connected；
Step 4: as shown in Figure 5, web member and the ball that winds up are installed；(angle steel purlin is arranged in top spin position by measurement of coordinates
Frame moulding bed)
Step 5: as shown in Figure 6, the second grid top boom and web member are connected；
Step 6: as shown in Figure 7, two grids are mounted to basic unit；
Step 7: as shown in Figure 8, expand basic unit；
Step 8: as shown in Figure 9, web member is installed；
Step 9: as shown in Figure 10, it is assembled into relatively firm basic unit；
Step 10: by shown in Figure 11, expand basic unit；
Pass through the above method: upper layer rack, string integral assembling is completed up and down.
The welding of rack first carries out reinforcing weldering to node, welds lower-chord panel point, is welding upper chord node, all welding are adopted
With symmetrically and evenly welding.
(3) rack assembly in upper layer is checked and accepted:
1, the weld seam of all extractions 50% of rack is detected using nondestructive inspection, carries out preservative treatment after detection is qualified
It can lift.
2, check rack overall appearance size and sphere nodes whether with drawing position consistency.
3, check whether the camber of rack meets in-depth Design Requirement Drawing.
(4) upper layer rack integral hoisting:
Rack uses the construction method of installation on ground integral hoisting.The suspension centre of lifting is arranged, the stability of suspension centre part
It is checked respectively, provides foundation for safty hoisting construction, and carry out forcing checking.According to grid structure form, feature, ruler
The composite factors such as very little, weight and field condition, from trade area, Home Base engineering is adopted 3 autocrane monolithic hoisting methods and is applied
Work.Every crane sets 2 suspension centres.Specific hoisting point position checking computations and crane position are illustrated in fig. 12 shown below.
Suspension centre vertical applied force calculated result such as table 1:
1 suspension centre vertical applied force table of table
Hoisting process utilizes crane weight display, and when rack lifts in advance, steady state reads each crane hanging component
Weight keeps the weighing load of every crane, in lifting process to guarantee that rack is steady in whole lifting process
Degree.It when rack hoisting depth is more than 1 meter of target absolute altitude, then moves horizontally, is slowly lowerd after being moved horizontally to support position.It is logical
Jack is crossed, jack thin portion is in place.It is measured by using total station, level meter, theodolite, infrared ambulator.
(5) upper layer rack fixed pivot:
Support is welded after rack thin portion is in place, since overhead welding carries out welding safeguard procedures.
(6) lower layer's rack segmented assembly lifts:
As shown in figure 13, lower layer's rack is divided into 6 groups, about 1 ton of the grouping 1,6 weights of one section, is grouped 2,3,4,5 single groups
About 2.6 tons of weight.Grouping 1,6 uses 25 tons of electric blocks, and grouping 2,3,4,5 is electronic using 45 tons of electric blocks liftings
Cucurbit is mounted on belpharoedema position under the corresponding rack of lower hanging hang structure.It is lifted before lifting in four angle setting drawstrings of each grouping lower edge
It is fixed using fixed afterwards in place, if there is partial deviations to control using drawstring.1A-1 axis and the building 1B 1BC-U axis in the building 1A
The verticality and flatness of 9 layers of installation monitoring device monitoring steel construction.
(7) upper and lower level rack connects:
Implement to be welded to connect using Hanging Basket after lifting is in place.In overhead welding or electric welding cutting, operator should be equipped with
Slag bucket prevents welding slag and the metal or spark cut off fall and hurt sb.'s feelings.And carry out welding draught exclusion device.Connection suspension steel construction is hung
When bar, 225 meters of 900mm wide long sizing steel springboard exit passageway, channel are being set before hanging Hanging Basket under rack between hanging stick part
Guardrail is arranged using steel pipe in two sides, and belpharoedema and rod piece lower part completely hang anti-drop net under rack.
The position height is 42.4 meters, and operator is directly from exit passageway on the building 1A and 1B building roof.
Fragment suspension steel construction is arranged after connecting with rack when hanging part under steel construction is hung in docking on the suspension structure
Guardrail is arranged using steel pipe in 115 meters of 900mm wide long sizing steel springboard exit passageway, channel two sides, under rack under belpharoedema and rod piece
Portion completely hangs anti-drop net.Anti-fall card is arranged in Hanging Basket hook position in production, and to prevent hook from loosening and falling off, protective equipment is carried out
It again hangs Hanging Basket and implements welding.
(8) it checks and accepts and delivers:
After the completion of construction, deflection value (the scratching after the completion of amount of deflection and roofworks including rack self weight of rack should be measured
Degree), the amount of deflection average value surveyed should not exceed the 5% of design value, and the sag curve surveyed should achieve.The deflection observation of rack
Point: to small span, being located at lower edge center a bit, to big-and-middle span, can set at 5 points, and a bit, two to lower edge span four in lower edge center
Each 2 points at branch, the amount of deflection at three quartering points of each span should be measured to three-way latticed grid.
When IMM algorithm, the vertically and horizontally side length deviation of rack, the off-centring and height tolerance of supporting-point should be checked.In length and breadth
It should be the 1/2000 of length to side length deviation allowable value, and should not exceed 30mm；Off-centring permissible value should be rack span
1/3000, and should not exceed 30mm；Height tolerance permissible value: between the rack consecutive points of periphery supporting, it should be adjacent support
The 1/400 of spacing, and should not exceed 15mm, between highest and minimum point, it should be 30mm；To the rack of multi-point support, phase should be
The 1/800 of adjacent support distance, and should not exceed 30mm.
The rack acceptance of work should have the following files: Construction of The Grids figure, as-built drawing, Design Change Document, construction organization are set
The quality certificate and test report of meter, steel used and other materials；The components work certificate book and test report of rack
It accuses, record of acceptance, welder qualification test verification of conformity, weldquality and the high-strength bolt quality inspection of rack spelling shape each process provide
Geometric dimension error and amount of deflection record after material, total spelling are in place.
50% is taken out to the welding of all weld seams and carries out nondestructive inspection, according to the requirement of second-order weld standard.After flaw detection is qualified, into
Row preservative treatment.Owner is transferred by standard of delivery.
Three, the material and equipment being related in the present embodiment include:
Material: solder sphere, steel structural rod piece, anticorrosive paint, welding wire, safety net, steel springboard；
Material requirements:
1, the kind, specifications and characteristics etc. of steel should meet the requirement of national current standard and design.
2, the kind, specifications and characteristics etc. of welding material should meet the requirement of national current standard and design.
3, material and welding wire should by " GB/T700-2006 ", " GB/T14957 ", " GB/T8110 ", " GB/T10045 ",
The prescribed requirement of " GB/T17493 " strictly carries out physics, chemistry, mechanical property and reviews.
4, the carbon dioxide gas that gas shielded arc welding uses should meet the regulation of existing professional standard HG/T2537.
5, steel ball should meet " Elements of Space Grid Truss welded spherical node " JG/T 11-2009 requirement, and welding hollowing ball geometry of sphere size permits
Perhaps deviation is shown in Table 2:
Welding hollowing ball geometric dimension tolerance table 2
Ball should carry out mechanical test, and ultimate bearing capacity should be provided by JG/T 11-2009.Ribbing ball, floor should be located at upper
In lower edge own layer.
6, the position of steel grid structure support orientation axis, support built-in fitting specification should meet design requirement.Upper wire
When frame is mounted on support position, support center should not exceed 10mm to the deviation of orientation axis.
7, the tolerance of the position of supporting surface top plate, absolute altitude, levelness and support anchor bolt position should meet the rule of table 3
It is fixed.
Supporting surface top plate, support anchor bolt position tolerance (mm) table 3
8, the tolerance of smallest assembled rigid unit should meet the regulation of table 4
The tolerance (mm) of smallest assembled rigid unit
Table 4
9, it should be measured respectively disturb angle value, and measured disturb after the completion of steel grid structure is always spelled and after the completion of roofworks
1.15 times accordingly designed are not to be exceeded in angle value.
10, after steel grid structure is installed, node and rod piece surface should be clean, should not there is apparent scar, silt
And dirt.Bolted spherical node should fill out institute's seam with oil loam embedding tight, and should seal extra screw hole.
11, after steel grid structure is installed, the tolerance of installation should meet the regulation of table 5.
The tolerance (mm) of steel grid structure installation
Table 5
12, seamless steel pipe fitting allows length variation to be ± 1mm, and the high tolerance ± 2mm of single-piece, the diagonal line that winds up allows inclined
Difference ± 3mm, upper lower-chord panel point centre deviation 2mm, when slitting or piecemeal unit truss length are not more than 20m, splicing edge lengths permit
Perhaps deviation ± 10mm, when the length of item or block is greater than 20m, splicing edge lengths tolerance is ± 20mm, is answered before total assembly
Accurate unwrapping wire, the tolerance of unwrapping wire are respectively the 1/10000 of side length and diagonal line length.
13, welding is carried out by GB50205 " structural steelwork construction and acceptance specification " requirement.20% ultrasonic wave of tension weld bond
Flaw detection (but be actually expanded in construction and 50% surpass spy), it is desirable that second-order weld.Weld appearance detection is generally using range estimation.
14, the various components of steel grid structure should carry out processing of rust removing, and derusting grade reaches Sa2.5 grades；Live touch-up paint removes
Rust gram is thoroughly derusted using electronic, Pneumatic derusting tool, reaches St3 grades, and reaches 35 roughness for arriving 55um.It is qualified by inspection
After carry out coating.
15, film layer thickness requirement, epoxy zinc rich primer thickness of dry film 60um, epoxy micaceous iron intermediate coat dried lacquer film thickness
120um, polyurethane finish thickness of dry film 60um.Paint should have good compatibility with fireproof coating.Anti-corrosion primer should be with substrate
There is good adhesion effect, anti-corrosion primer should should be not less than 5MPa with the adhesive force of substrate.
16, environment temperature when coating is preferably 5 DEG C~38 DEG C, and relative humidity should not exceed 85%.Component surface has moisture condensation
When must not coating, sleet sky must not carry out outdoor work.It must not drench with rain in 4h after coating
Equipment: jack lift, electric block, total station, theodolite, level meter, infrared ambulator, catching device, Hanging Basket.
Four, the safety measure that the present embodiment is taken:
1, in accordance with the administrative provisions of high-rise working safe practice " construction high-rise working technical specification of security " JGJ 80-
Pertinent regulations in 2016 and national standard GB 6067.1-2010 " safety rules for lifting appliances " etc..
2, it all scaffolds and could use after setting up bracket and must checking and accepting.
2, plus the worker (including apprentice, trainee, civilian worker) of this engineering construction, the safe practice that know this work post are grasped
Make regulation, in operation, should adhere to work position, forbids to operate after drinking.
3, a worker has to pass through three-level safety education, to special work post such as electrician, electrogas welding, hoistman, large size
The operative employee of power-equipment must hold certificate of safety operation.
4, the activity of safety week, daily construction safety Technical responsibilities engineer explain secure attention thing according to same day construction characteristic
, the work of group performance, operation individual, which should divide the work, to be defined, and should have special messenger's unified command, cooperation in operation.
5, plant must be safe and reliable, and sets special messenger and be responsible for, periodic inspection.Rainy season, outdoor stored hoist engine,
Electric welding machine, crane etc., will there is a lid rain-tight, not water logging, the Grounding of operator's preoperation inspection power supply, and electric checking person is fixed
Phase checks insulation situation.Electrical equipment will have to be grounded qualifiedly.There is earth leakage protective device.Special equipment special messenger operation.
6, electric wiring (temporary line) and electrical equipment, the work such as assembly and disassembly and wiring, should be responsible for, other people must not by electrician
It tampers.Earth leakage protective device must be installed using electric tool.The earthing of casing of outdoor electronic equipment must be good, and takes anti-
Rain, moisture preventive measure, on insulation board, sufficient amount of fireproofing installation is arranged in living area at station when use.
7, used tool should whip in inserter bag when operation, aisle, channel and apparatus of ascending a height in operation, should be clear at any time
It sweeps completely, material and waste material under dismantling should all be cleared up in time to be transported, and arbitrarily must not disorderly be set or be abandoned downwards.Transmitting article is forbidden
Throwing.
8, setting safety net and edge protection are required in strict accordance with scheme.
9, otherwise high altitude operation must be not allowed to construct with safety cap, safety belt.
10, warning elt is arranged in rack projection lower section, and special messenger is arranged to guard.
11, safe watch system is established.It is on duty that the per tour of project group has a leader to be responsible for safety.
12, security work responsibility system is established, per tour also sets two full-time security officials in addition to one is led responsible site safety, point
Block is distinguished to check on.
13, prevent that falling object from high altitude reinforces monitoring of telling somebody what one's real intentions are as the security concern of construction.
Five, the environmental protection measure that the present embodiment is taken:
1, to create civilized construction demonstration building site as target, modern-style construction responsibility system is implemented, by civilized construction and work
Cheng Zhiliang, safety are placed on par, carry out civilized construction.
2, site operation equipment must be laid by general arrangement plan specified position, the classification gauges such as tool, material, semi-finished product
Lattice are neatly stacked.
3, construction water, electricity, pipeline installation have to comply with regulation, and mounting arrangement is neat, forbids any bracing wire, connects electricity, night
Between construction must have enough illuminations.
4, on-site working production equipment should keep it is clean and tidy, beautiful, daily knock off before answer timely clearing and retrieving to be scattered material
And tool, accomplish that the complete material of work is clear, who does, and who is clear, place is clean and tidy, connection is carried out with environmental sanitation to building waste and is cleared in time.
5, scene sets special messenger and is responsible for safeguarding work, and non-construction personnel is forbidden to enter, and tool materials disengaging field must accord with
Regulation formality is closed, has anti-theft measure to financial equipment.
Above-described embodiment is only one of the preferred embodiments of the invention, should not be taken to limit protection model of the invention
It encloses, as long as in subject of the present invention design philosophy and mentally making skimble-skamble change or polishing, the technology solved
Problem is still consistent with the present invention, should all be included within protection scope of the present invention.
Claims (8)
1. Large-span Spherical rack integral hoisting method, which comprises the steps of:
(1) surveying setting-out marks lower edge ball position using total station instrument coordinate setting-out；
(2) upper layer rack is assembled, disposes steel pipe moulding bed identical with sphere diameter in lower edge ball position, steel pipe moulding bed height is pressed
Maximum sphere is arranged away from ground 20cm, the assembled upper layer rack on steel pipe moulding bed；
(3) rack assembly in upper layer is checked and accepted, and using the weld seam of nondestructive inspection detection 50%, and checks overall appearance size and spherical node
Whether whether point with the camber of drawing position consistency, rack meet in-depth Design Requirement Drawing, and preservative treatment is carried out after meeting,
It does not meet and is checked, changed according to step (2)~(3)；
(4) upper layer rack integral hoisting is carried out preservative treatment after upper layer rack is qualified, is then cooperated jointly using more cranes
Integral hoisting is and in place by jack, jack thin portion to support position, using total station, level meter, theodolite, infrared ray
Rangefinder measures；
(5) upper layer rack fixed pivot welds to fix upper layer upper wire valence and support after upper layer rack thin portion is in place
Rack, and carry out welding safeguard procedures；
(6) lower layer's rack segmented assembly lifts, and on upper layer, electric block is installed in the corresponding position of rack, is lifted by electric block
Each segmentation of lower layer's rack, using falling, fixed is fixed, and partial deviations are controlled using drawstring afterwards in place for lifting；
(7) upper and lower level rack connects, and lower layer's network frame hoisting is in place and after fixing, and implements to be welded to connect upper and lower level net using Hanging Basket
Frame, and welding safeguard procedures are carried out, setting exit passageway and anti-drop net below Hanging Basket；
(8) it checks and accepts and delivers, the deflection value for measuring rack, checks that the center of supporting-point is inclined at the vertically and horizontally side length deviation for checking rack
Each file, qualification involved in shifting and height tolerance, weld seam and examination work progress using nondestructive inspection detection 50%
It completes to deliver afterwards.
2. the method as described in claim 1, which is characterized in that in step (2), upper layer rack assembly process includes following step
It is rapid:
Step 1: lower limit sphere is installed on steel pipe moulding bed；
Step 2: it is connected between lower edge ball by lower boom, forms grid-like lower boom grid；
Step 3: each lower boom grid installation is connected the web member of the vertical top position of lower boom grid central point by four angles,
And the ball that winds up is set on web member；
Step 4: being connected by top boom between the ball that winds up, form grid-like top boom grid, is assembled into relatively firm substantially single
Member；
Step 5: weld together according to the basic unit that the content of step 1 to step 4 obtains.
3. method according to claim 2, which is characterized in that in step (2), first reinforcing weldering is carried out to node, under first welding
Chord node, then chord node is welded, all welding use symmetrically and evenly welding.
4. the method as described in claim 1, which is characterized in that in step (4), upper layer rack integral hoisting utilizes crane weight
Display is measured, when rack lifts in advance, steady state reads each crane hanging component weight, in lifting process, is kept for every rise
The weighing load of heavy-duty machine, to guarantee smoothness of the rack in whole lifting process, when rack hoisting depth is more than target absolute altitude 1
Meter Shi, then move horizontally, it is slowly put down after being moved horizontally to support position, then in place by jack, jack thin portion.
5. the method as described in claim 1, which is characterized in that in step (8), check and accept in standard of delivery, the amount of deflection surveyed is flat
Mean value is not more than the 5% of design value.
6. the method as described in claim 1, which is characterized in that in step (8), check and accept in standard of delivery, vertically and horizontally side length is inclined
Poor permissible value is the 1/2000 of length, and is not more than 30mm；Off-centring permissible value is the 1/3000 of rack span, and is not more than
30mm；Height tolerance permissible value: being the 1/400 of adjacent support spacing, and be not more than between the rack consecutive points of periphery supporting
15mm is 30mm between highest and minimum point；It is the 1/800 of adjacent support distance to the rack of multi-point support, and less
In 30mm.
7. the method as described in claim 1, which is characterized in that in step (8), checking and accepting the file delivered and be related to includes: rack
Quality certificate and the test of construction drawing, as-built drawing, Design Change Document, Design of Construction Organization, steel used and other materials
Report；Components work certificate book and test report, the rack of rack spell the record of acceptance of shape each process, welder qualification test qualification
It proves, geometric dimension error and amount of deflection record after weldquality and high-strength bolt quality inspection data, total spelling in place.
8. the method as described in claim 1, which is characterized in that in step (8), after nondestructive inspection detection is qualified, carry out anti-corrosion
It is delivered after processing by standard of delivery.
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| CN114809584A (en) * | 2022-05-11 | 2022-07-29 | 中国建筑第二工程局有限公司 | High-efficiency and high-precision jig frame and net rack assembling method |
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