CN101372865A - Stay suspender multispan beam structure highly hollow-out formwork system and construction method - Google Patents
Stay suspender multispan beam structure highly hollow-out formwork system and construction method Download PDFInfo
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- CN101372865A CN101372865A CNA2008100429882A CN200810042988A CN101372865A CN 101372865 A CN101372865 A CN 101372865A CN A2008100429882 A CNA2008100429882 A CN A2008100429882A CN 200810042988 A CN200810042988 A CN 200810042988A CN 101372865 A CN101372865 A CN 101372865A
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Abstract
The invention relates to an inclined pulling type suspender multi-span continuous beam structure high hollowed-out formwork system and a construction method. The system is a structure support system loaded on a support bent frame of a concrete die plate for supporting the upper floor, and the system is formed through adopting section steel to form a primary and secondary beam steel platform structure and pulling the reinforced concrete framework of the surrounding major structure through a steel pulling rod. Formwork steel platform formed by the inclined structure changes the high hollowed-out structure formwork into a general formwork board which is supported and established on the supporting platform of the inclined pulling type suspender multi-span continuous beam structure.
Description
One, technical field
The present invention relates to a kind of building operations formwork structural system, a kind of specifically stay suspender multispan beam structure highly hollow-out formwork system the invention still further relates to the job practices of this stay suspender multispan beam structure highly hollow-out formwork system.
Two, background technology
Along with the expansion significantly of urban construction scale in recent years, high-rise, super highrise building quantity constantly increases, for reaching effect attractive in appearance, atmosphere, high hollow out layer, high-altitude conjoined structure have appearred again, brought an a series of difficult problem for the concrete formwork construction, increased danger in the civil engineering process.There is the total collapse of tall and big formwork to cause the serious accident of heavy economic losses and casualties that the content that the Ministry of Construction also attaches most importance to the security column of tall and big formwork engineering and manages takes place frequently.For the formwork of high engraved structure, conventional fastener type steel pipe scaffold can not satisfy its demand by the method for ground full hall framed bent formwork.
Three, summary of the invention
The technical problem of solution required for the present invention provides the highly hollow-out formwork system of a kind of stay suspender multispan beam structure as the formwork platform, this system is applicable to high hollow out floor, high-altitude disjunctor and the concrete structure formwork construction of encorbelmenting greatly, having avoided the superelevation support to land sets up, the tube material input amount of having saved superelevation formwork framed bent thus reduces cost, has reduced the whole unstability of support simultaneously and has caved in.In addition, the present invention also provides the job practices of this stay suspender multispan beam high-supported formwork structural system.
A kind of stay suspender multispan beam structure highly hollow-out formwork system of the present invention, it comprises that section steel beam, shaped steel diagonal member, the steel pipe scaffold template of primary load bearing support, described shaped steel is formed primary and secondary joist steel platform, girder is the two end supports form and is arranged on to wait to build and has built up on the fabric structure under the high hollow out floor, secondary beam is arranged on the girder, by shaped steel diagonal member and perimeter body structure reinforcing bars concrete frame drawknot, steel pipe scaffold supports and then sets up on primary and secondary joist steel platform.
The job practices of above-mentioned stay suspender multispan beam structure highly hollow-out formwork system may further comprise the steps:
1, the installation of built-in fitting
1.1 construction survey:, must examine and determine through metrological service before transit, water instrument, the steel ruler construction survey for reaching the correct measurement achievement that meets required precision.
After 1.2 the position measurement of built-in fitting is come out, built-in fitting is fixed on corresponding position gets final product according to the building axis that provides, absolute altitude.
2, the making of girder steel
2.1 will check that each part size, shape and contraction place situation before wanting before the assembling, the qualified clearage with grinding wheel welded seam area, cleaning scope then used is wide 4 times of weld seam.
2.2 after marking the member position line on the platform, press the line assembling, adopt manual electric arc welding.
2.3 the assembling of gusset, junction plate will guarantee that reference line aligns with the beam center line, assembling should experienced workman be carried out, and guarantees accuracy.
2.4 member is checked and accepted: after the steel structure manufacture was finished, controlling unit should carry out an acceptance inspection by the requirement of working drawing and relevant specification.The profile of finished product and the deviation of physical dimension are answered the compliant requirement.After every batch of member is qualified by inspection, should provide work certificate and material quality guarantee book.
3, the installation of girder steel platform
3.1 utilize the existing tower crane in construction site to finish lifting work, use flexible material such as rubber between wire rope and girder steel and carry out liner.The selection of suspension centre should guarantee that member is indeformable in the lifting process, and is non-warping and steady.Before the lifting, should check whether lifting machinery and instrument are in serviceable condition, have problem should stop lifting, machinery and tool belt " disease " operation are forbidden in lifting again after the problem for the treatment of solves
3.2 should try earlier to hang before the formal lifting, when hanging, examination slowly promotes suspension hook earlier, in the process that suspension hook promotes, hoist cable is made in order.The lifting that stops suspension hook after the stressed tension of hoist cable checks whether rigging bundlees firmly.The inspection rear hanger that finishes slowly hoists, and checks, adjusts hoisting point position, member stress etc.
3.3 hanging, examination finishes formally to lift after inspection all meets the demands.When formally lifting lifting, girder steel one end is the root cable rope, regulates skyborne direction of girder steel and swing, earlier girder steel is hung ground during lifting, as if the then slowly lifting of girder steel two ends held stationary, and preliminary back in place of girder steel and bracket welding.
3.4 the diagonal member on-site consolidation guarantees that the setting angle of diagonal member and girder steel is correct.
3.5 when secondary beam is installed, should make the operating platform of the moveable platform of a 1*2m, need around the platform to safeguard that operating personnel should be fixed on the safety belt hook on the railing during work high above the ground with railing as the space mounting personnel.
3.6 on secondary beam, weld vertical rod socket joint bar dowel by the design pitch of top framed bent, long 0.2 meter of reinforcing bar, diameter 25mm guarantees that the formwork framed bent does not slide when concreting.
4, the dismounting of steel platform
4.1 can form removal when being reached 100% design strength by the same condition curing concrete intensity of test block of the concrete floor of being built, after girder steel treats that upper mould and steel pipe supporting row frame load are all laid down, have outside to inside and remove by Pin.
4.2 girder steel is removed 2 of employings and is hung, and by Chain block and manpower translation, makes it to pull in the peripheral floor of finishing of having constructed.
The stay suspender multispan beam structure highly hollow-out formwork system adopts shaped steel as main stress system with girder, pull bar etc., and is safe and practical, succinct slim and graceful.This job practices is simple in structure, member is light, utilizes the construction tower crane of highrise building just can finish lifting; Install simply, energy assembly unit, welding do not need other big machinery or special installation on operating surface; Quick construction, no duration constraint; Structural safety, practicality are out of shape small; This structure also have break the whole up into parts, advantage such as convenient disassembly.
This formwork structural system is compared with traditional truss scheme, has obvious superiority:
A) trussed construction Gao Erda is bigger from weight, and link node is many.And stay suspender multispan beam structure, girder, pull bar all adopt shaped steel, and from heavy and light, node is few.
B) truss member is many, and member stress complexity such as upper chord, lower chord, web member are installed and difficulty is all compared in dismounting, particularly remove especially difficulty.And the stay suspender multispan beam structure rod member is few, and is stressed simple, and lifting, installation and dismounting are all more convenient.Save steel, the duration is fast.
C) members such as cable-stayed type suspension rod beam structure girder and pull bar are produce in factory, the on-the-spot installation, and the construction technology condition is good, and quality is controlled easily.
Four, description of drawings
Fig. 1 is the plan view of stay suspender multispan beam structure highly hollow-out formwork system of the present invention;
Fig. 2 is the elevation of stay suspender multispan beam structure highly hollow-out formwork system of the present invention;
Fig. 3 is that girder steel tiltedly draws suspension rod lower node drawing;
Fig. 4 is that girder steel tiltedly draws node anchor slab drawing on the suspension rod;
Fig. 5 is a construction flow chart of the present invention.
Five, the specific embodiment
As shown in Figure 1 and Figure 2, a kind of stay suspender multispan beam structure highly hollow-out formwork system of the present invention, it comprises that section steel beam, shaped steel diagonal member, the steel pipe scaffold template of primary load bearing support, described shaped steel is formed primary and secondary joist steel platform, girder is the two end supports form and is arranged on to wait to build and has built up on the fabric structure under the high hollow out floor, secondary beam is arranged on the girder, by shaped steel diagonal member and perimeter body structure reinforcing bars concrete frame drawknot, steel pipe scaffold supports and then sets up on primary and secondary joist steel platform.
1, technological principle of the present invention
Adopt shaped steel to form primary and secondary joist steel platform structure,, form the structure support system of supporting upper floor concrete blinding supporting row frame load by the drawknot of reinforcing pull rod and perimeter body structure reinforcing bars concrete frame.The formwork steel platform that this slant-pull structure forms, the general template that high hollow out layer structure formwork is become on the stay suspender multispan beam structure support platform installs.
2, construction technology process and key points for operation
2.1 construction technology process
The concrete construction technology process of this formwork system is seen Fig. 5.
2.2 key points for operation
2.2.1 the stay suspender multispan beam structure highly hollow-out formwork system makes full use of the bearing capacity of concreting structure, on the structure that adopts girder steel to adhere to (or shelving) and built up, and utilize and tiltedly draw the rigid support of suspension rod as the girder steel span centre, reduce the supporting span of large-span steel girder, controlled the amount of deflection of girder steel span centre effectively.For cable-stayed type suspension rod beam support system, employing is based on the linear elastic analysis method of the limit state design method of probability theory and structural mechanics, steel work, steel concrete, by the construct overall calculation analysis of mechanics of finite element analysis softwares such as ANSYS, control girder steel, the stress ratio of pull bar under least favorable construction operating mode.
2.2.2 built-in fitting construction: before the built-in fitting construction, should at first understand its pattern, position and quantity, make by standard-required then and fixing built-in fitting.It is qualified that the raw material of built-in fitting should be guaranteed, must check its quality certification before the processing, carries out necessary mechanical property test and chemical composition analysis, and impression quality must be qualified simultaneously, the no obvious corrosion phenomena in surface.The straightening blanking of reinforcing bar and the line of steel plate cutting need to go up size according to figure and conscientiously implement.For the structure built-in fitting and the built-in fitting of specific (special) requirements is arranged, should be noted that the regulations such as crotch length, angle of dowel.Concrete is in the process of building, and vibrating head should be avoided directly contacting with built-in fitting, and near built-in fitting, it is careful to need, and observes built-in fitting while vibrating, and in time proofreaies and correct the built-in fitting position.Guarantee that it does not produce over-large displacement.
2.2.3, steel stage support node: because the node of whole platform structure all is a welded construction, so the construction of node is the key of whole steel platform normal operation, and the construction of node must require and norm of steel structure be constructed according to plan.Should check the disposition of the groove, gap, root face etc. of the joint quality of weldment and weld zone before the welding.Welding rod before use should by product description regulation cure the time and stoving temperature cures.On the member that assembles, weld, should strict be undertaken, with the control postwelding deformation of member by welding procedure predetermined parameter and welding sequence.The difference of welding position is correctly selected wlding.
2.2.4 platform is installed: when secondary beam is installed, should make the operating platform of moveable platform as the space mounting personnel, need around the platform to safeguard with railing, operating personnel should be fixed on the safety belt hook on the railing during work high above the ground.Should assume unified command of when the steel lifting component is in place, keep in touch with semaphore or whistle between lifting commander, a heavy industry, the loop wheel machine driver, guarantee that command signal is unimpeded, each constructor only could require to carry out construction operation in accordance with regulations behind clear command signal, safety first is guaranteed in the requirement of the strict execution of each constructor hoisting operation safety regulation for operations.
3, material and equipment
With all high hollow out layer on the whole world of Hefei is example, and the material and facility that be equipped with is as follows:.
Table 3-1 material list
Table 3-2 stem-winder
| Sequence number | Device name | Unit | Quantity | Remarks |
| 1 | AC welding set | Platform | 2 | The previous structure construction is equipped with |
| 2 | Oxygen, acetylene cut tool | Cover | 2 | The previous structure construction is equipped with |
| 3 | Tower crane | Platform | 1 | The previous structure construction is equipped with |
| 4 | The 1T Chain block | Individual | 3 | |
| 5 | Abrasive cutting off machine | Platform | 1 | The previous structure construction is equipped with |
| 6 | Level gauge | Platform | 1 | The previous structure construction is equipped with |
| 7 | Transit | Platform | 1 | The previous structure construction is equipped with |
| 8 | Wire rope | |||
| 9 | From coir rope | |||
| 10 | The 5m chi | {。##.##1}, | 2 | The previous structure construction is equipped with |
4, quality control
This stay suspender multispan beam structure highly hollow-out formwork system is by " Code for design of steel structures " (GB50017-2003) design, construction is by " code for acceptance of construction quality of steel structures " (GB50205-2001), " construction steel structure welding skill rules " (JGJ81-2002), " the support safety technical specification of building operations fastener horizontal shuttering " (DG/TJ08-016-2004) carried out.
4.1 for selecting of welding rod and solder flux model, need carry out, when adopting pressure submerged arc welding, adopt the welding rod that adapts with base metal intensity according to its instructions for use and different performance; When adopting hand welding, should be by the low base metal welding rod model of intensity.
4.2 when adopting manual welding, the height of fillet weld seam will meet the working drawing requirement.Weld seam must not leak weldering, few weldering, lack weldering, pore must not be arranged, stings meat, the slag inclusion phenomenon, and the naked eyes sense organ is good.
4.3 girder, secondary beam steel material must meet the working drawing requirement, shaped steel should be smooth straight, and bending and cripling must not be arranged.
5, safety measure
Safety helmets must be worn 5.1 set up the falsework personnel, fasten the safety belt, wear on-slip shoes.
5.2 the personal height operation will have the firm part of basing oneself upon, and is equipped with various security protection facilities, fastens the safety belt, and wears on-slip shoes, and disposes reliable protective screening.The safety belt hook necessarily hangs on the firm object in work progress.As: hang on the operating platform railing, hang over wire ropeway etc.When carrying out welding procedure aloft, the constructor must stand on the operating platform, and safety belt is hung on the platform steel pipe.Personal security when guaranteeing to construct.
5.3 the constructor must use the labour protection articles for use of standard up to specification, winter construction must be equipped with the winter protection articles for labour protection, constructs by security technology standard and safety regulation for operations and national labour protection regulation.
5.4 welding site clearing explosives, inflammable items, and the combustible and explosive articles around the reply covers, isolates.Fire operation should be handled welding and cutting permit before construction, establish sole duty get angry guardian, fire-fighting equipment and fireproofing.
5.5 in the concreting process, should send the special messenger to observe the duty of formwork bracing system, when noting abnormalities, the observation personnel should notify the construction person in charge at once, the construction person in charge should notify immediately and build personnel's Suspend Job, should take to withdraw rapidly personnel's emergency measure when the situation is critical, and carry out consolidation process.
6, performance analysis
The method that stay suspender multispan beam carries out formwork construction as the formwork platform is to avoid the superelevation support to land formwork, prevents that the whole unstability of support from caving in, and solves effective, the economic method of unsettled high-supported formwork construction.
With all high hollow out layer on the whole world of Hefei is example, and this high hollow out layer formwork has adopted 5 Pin cable-stayed type suspension rods, 5 Span Continuous girder steels to make formwork support platform and the construction technology that the construction of conventional steel scaffold combines, and has obtained tangible economic benefit and social benefit.
6.1 energy-conservation and economic benefit
6.1.1 compare with traditional trussed construction, save about 4 tons of steel, steel saving rate reaches 30%.
6.1.2 aspect cost, saving of work and time, the construction rapid and convenient effectively 3 days reductions of erection time, is saved 60,000 yuan of costs, and cost saving rate is 35-40%.
6.2 environment and social benefit
Member all adopts batch production production, and working condition and technology are all good than field fabrication, reduces on-the-spot manipulation strength and difficulty, raises labour productivity, and reduces and does over again and loss, has reduced noise pollution; Reduced the potential safety hazard of site operation when having guaranteed quality.
7, application example
7.1 engineering all on the whole world of Hefei:
7.1.1 project profile:
On the whole world of Hefei all main building from 6F push up to 31F top (promptly+19.80m extremely+99.60m) between, plane 8 to 10 between centers are the hollow out layer, hollow out height 80m, length 15.6m, depth 11.3m.The hollow out layer mates in 32F, mates layer absolute altitude and is+99.6m long only 14.9m, clear span 9.7m.This hollow out layer formwork construction adopts 5 Pin cable-stayed type suspension rods, 5 Span Continuous girder steels to make formwork support platform and combines with the construction of conventional steel scaffold.
7.1.2 workload in kind:
The light-duty 3.6t of girder Q235I30 type hot rolling, the light-duty 1.35t of pull bar Q235[12 hot rolling, the light-duty 2.5t of joist Q235[12 hot rolling.
7.1.3 effect:
Establishing the special messenger in the construction works observes support system, do not occur walking about, and the mould phenomenon does not take place to run, mate layer concrete build finish after, also do not occur supporting unstability, girder span centre maximum distortion 4.7mm is after form removable, and concrete surface is smooth, negative and positive angle Founder, error all has been controlled in the allowable variation scope.Save about 4 tons of steel, steel saving rate reaches 30%.Effectively 3 days reductions of erection time, save 60,000 yuan of costs, cost saving rate is 35-40%.
Claims (2)
1. stay suspender multispan beam structure highly hollow-out formwork system, it comprises that section steel beam, shaped steel diagonal member, the steel pipe scaffold template of primary load bearing support, described shaped steel is formed primary and secondary joist steel platform, girder is the two end supports form and is arranged on to wait to build and has built up on the fabric structure under the high hollow out floor, secondary beam is arranged on the girder, by shaped steel diagonal member and perimeter body structure reinforcing bars concrete frame drawknot, steel pipe scaffold supports and then sets up on primary and secondary joist steel platform.
2. according to the job practices of the described stay suspender multispan beam structure highly hollow-out formwork system of claim 1, may further comprise the steps:
The installation of A, built-in fitting
A, construction survey:, must examine and determine through metrological service before transit, water instrument, the steel ruler construction survey for reaching the correct measurement achievement that meets required precision.
After building axis, the absolute altitude that b, basis provide comes out the position measurement of built-in fitting, built-in fitting is fixed on corresponding position gets final product.
The making of B, girder steel
Will check that each part size, shape and contraction place situation before wanting before a, the assembling, the qualified clearage with grinding wheel welded seam area, cleaning scope then used is wide 4 times of weld seam.
B, after marking the member position line on the platform, press line assembling, adopt manual electric arc welding.
The assembling of c, gusset, junction plate will guarantee that reference line aligns with the beam center line, and assembling should experienced workman be carried out, and guarantees accuracy.
D, member are checked and accepted: after the steel structure manufacture was finished, controlling unit should carry out an acceptance inspection by the requirement of working drawing and relevant specification.The profile of finished product and the deviation of physical dimension should meet the regulation of following table.After every batch of member is qualified by inspection, should provide work certificate and material quality guarantee book.
The installation of C, girder steel platform
A, utilize the existing tower crane in construction site to finish lifting work, use flexible material such as rubber between wire rope and girder steel and carry out liner.The selection of suspension centre should guarantee that member is indeformable in the lifting process, and is non-warping and steady.Before the lifting, should check whether lifting machinery and instrument are in serviceable condition, have problem should stop lifting, machinery and tool belt " disease " operation are forbidden in lifting again after the problem for the treatment of solves
Should try earlier to hang before b, the formal lifting, slowly promote suspension hook when examination is hung earlier, in the process that suspension hook promotes, hoist cable be made in order.The lifting that stops suspension hook after the stressed tension of hoist cable checks whether rigging bundlees firmly.The inspection rear hanger that finishes slowly hoists, and checks, adjusts hoisting point position, member stress etc.
C, examination are hung and are finished can formally lift after inspection all meets the demands.When formally lifting lifting, girder steel one end is the root cable rope, regulates skyborne direction of girder steel and swing, earlier girder steel is hung ground during lifting, as if the then slowly lifting of girder steel two ends held stationary, and preliminary back in place of girder steel and bracket welding.
D, diagonal member on-site consolidation guarantee that the setting angle of diagonal member and girder steel is correct.
When e, installation secondary beam, should make the operating platform of the moveable platform of a 1*2m as the space mounting personnel, need around the platform safeguard with railing, operating personnel should be fixed on the safety belt hook on the railing during work high above the ground.
F, on secondary beam by the design pitch of top framed bent welding vertical rod socket joint bar dowel, long 0.2 meter of reinforcing bar, diameter 25mm guarantees that the formwork framed bent does not slide when concreting.
The dismounting of D, steel platform
A, can form removal when being reached 100% design strength by the same condition curing concrete intensity of test block of the concrete floor of being built, after girder steel treats that upper mould and steel pipe supporting row frame load are all laid down, have outside to inside and remove by Pin.
B, girder steel are removed 2 of employings and are hung, and by Chain block and manpower translation, make it to pull in the peripheral floor of finishing of having constructed.
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| CN101914990A (en) * | 2010-07-28 | 2010-12-15 | 重庆建工第二建设有限公司 | Beam-type transition layer cast-in-situ crossbeam construction formwork supporting system |
| CN102184282A (en) * | 2011-04-29 | 2011-09-14 | 深圳市建筑设计研究总院有限公司 | Method for calculating strength stress of multi-branch bowl cover spherical support and application of method |
| CN102251657A (en) * | 2011-04-08 | 2011-11-23 | 重庆建工集团股份有限公司 | Arching formwork erecting method for assembled framework beam plate |
| CN101929244B (en) * | 2009-08-28 | 2012-03-28 | 中国人民解放军63926部队 | Construction method for large-span cast-in-situ beam slab support system of plant |
| CN103147582A (en) * | 2013-03-19 | 2013-06-12 | 成军 | Overhead cantilever formwork construction method |
| CN103669368A (en) * | 2013-12-26 | 2014-03-26 | 上海建工二建集团有限公司 | Reverse building board construction structure and construction method thereof |
| CN104878914A (en) * | 2013-07-25 | 2015-09-02 | 中冶天工集团有限公司 | Skew-based abnormal-load all-round scaffold building method |
| CN104963697A (en) * | 2015-05-11 | 2015-10-07 | 中国人民武装警察部队水电第一总队 | Concrete construction mobile steel pipe shelving |
| CN107740569A (en) * | 2017-10-25 | 2018-02-27 | 湖北海洋工程装备研究院有限公司 | A kind of scaffold building method |
| CN109469391A (en) * | 2018-11-08 | 2019-03-15 | 滕州市建筑安装工程集团公司 | A kind of coal mine product silo wall integral forming method |
| CN111456400A (en) * | 2020-03-24 | 2020-07-28 | 中国五冶集团有限公司 | Interim operation platform structure in high altitude |
| CN114215365A (en) * | 2021-12-21 | 2022-03-22 | 中建钢构天津有限公司 | Method for mounting steel beam |
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| CN101929244B (en) * | 2009-08-28 | 2012-03-28 | 中国人民解放军63926部队 | Construction method for large-span cast-in-situ beam slab support system of plant |
| CN101914990A (en) * | 2010-07-28 | 2010-12-15 | 重庆建工第二建设有限公司 | Beam-type transition layer cast-in-situ crossbeam construction formwork supporting system |
| CN102251657A (en) * | 2011-04-08 | 2011-11-23 | 重庆建工集团股份有限公司 | Arching formwork erecting method for assembled framework beam plate |
| CN102251657B (en) * | 2011-04-08 | 2013-04-17 | 重庆建工集团股份有限公司 | Arching formwork erecting method for assembled framework beam plate |
| CN102184282A (en) * | 2011-04-29 | 2011-09-14 | 深圳市建筑设计研究总院有限公司 | Method for calculating strength stress of multi-branch bowl cover spherical support and application of method |
| CN102184282B (en) * | 2011-04-29 | 2012-10-24 | 深圳市建筑设计研究总院有限公司 | Method for calculating strength stress of multi-branch bowl cover spherical support and application of method |
| CN103147582A (en) * | 2013-03-19 | 2013-06-12 | 成军 | Overhead cantilever formwork construction method |
| CN104878914A (en) * | 2013-07-25 | 2015-09-02 | 中冶天工集团有限公司 | Skew-based abnormal-load all-round scaffold building method |
| CN103669368A (en) * | 2013-12-26 | 2014-03-26 | 上海建工二建集团有限公司 | Reverse building board construction structure and construction method thereof |
| CN103669368B (en) * | 2013-12-26 | 2016-05-11 | 上海建工二建集团有限公司 | Contrary plate constructing structure and the construction method thereof done |
| CN104963697A (en) * | 2015-05-11 | 2015-10-07 | 中国人民武装警察部队水电第一总队 | Concrete construction mobile steel pipe shelving |
| CN104963697B (en) * | 2015-05-11 | 2017-11-03 | 中国人民武装警察部队水电第一总队 | A kind of portable steel pipe framed bent of concrete construction |
| CN107740569A (en) * | 2017-10-25 | 2018-02-27 | 湖北海洋工程装备研究院有限公司 | A kind of scaffold building method |
| CN109469391A (en) * | 2018-11-08 | 2019-03-15 | 滕州市建筑安装工程集团公司 | A kind of coal mine product silo wall integral forming method |
| CN111456400A (en) * | 2020-03-24 | 2020-07-28 | 中国五冶集团有限公司 | Interim operation platform structure in high altitude |
| CN114215365A (en) * | 2021-12-21 | 2022-03-22 | 中建钢构天津有限公司 | Method for mounting steel beam |
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