CN102230313B - Bridge thin-wall hollow-pier chain block hoisting operation platform and construction method thereof - Google Patents
Bridge thin-wall hollow-pier chain block hoisting operation platform and construction method thereof Download PDFInfo
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- CN102230313B CN102230313B CN 201110060626 CN201110060626A CN102230313B CN 102230313 B CN102230313 B CN 102230313B CN 201110060626 CN201110060626 CN 201110060626 CN 201110060626 A CN201110060626 A CN 201110060626A CN 102230313 B CN102230313 B CN 102230313B
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- 238000010276 construction Methods 0.000 title claims abstract description 24
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 21
- 239000010959 steel Substances 0.000 claims abstract description 21
- 238000009415 formwork Methods 0.000 claims abstract description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 68
- 229910052742 iron Inorganic materials 0.000 claims description 34
- 230000003014 reinforcing effect Effects 0.000 claims description 17
- 230000010412 perfusion Effects 0.000 claims description 7
- 230000002787 reinforcement Effects 0.000 claims description 7
- 230000007306 turnover Effects 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 4
- 238000007596 consolidation process Methods 0.000 claims description 3
- 239000011121 hardwood Substances 0.000 claims description 2
- 238000004148 unit process Methods 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 claims 1
- 230000000630 rising effect Effects 0.000 claims 1
- 230000001360 synchronised effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 7
- 229920000915 polyvinyl chloride Polymers 0.000 abstract 6
- 239000004800 polyvinyl chloride Substances 0.000 abstract 6
- 230000009194 climbing Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000009416 shuttering Methods 0.000 description 1
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Abstract
The invention discloses a freeway bridge thin-wall hollow-pier chain block hoisting operation platform and a construction method thereof. The chain block hoisting operation platform (1) comprises a base (1-4), an upper-frame (1-1), a middle support (1-2) and a platform chain block (1-3), wherein the base (1-4) is connected with the middle support (1-2), and the middle support (1-2) is connected with the upper-frame (1-1); a VC (polyvinyl chloride) pipe (9) is arranged at the position which is 10cm below the top of a first formwork section (2) and 10cm below the top of a second formwork section (3) is provided with a PVC (polyvinyl chloride) pipe (9); steel bars are arranged in the PVC pipe; the upper surface of the chain block (1-3) is fixed on the steel bars in the PVC pipe, and the lower surface of the chain block (1-3) is connected with the base (1-4) through wire cables; and in the pier shaft (7) construction process, the PVC pipe is preburied in the pier shaft so as to reserve a plug hole for the supporting steel bars. The support operation platform system and the pier shaft formwork are separated, so that the operation efficiency and degree of safety are enhanced, and the invention is economical and reasonable.
Description
Technical field
The present invention relates to a kind of bridge on highway hollow pier Chain block and promote job platform and job practices thereof.
Background technology
Socioeconomic fast development impels high-grade highway, railway construction progressively to strengthen in the input scale of mountain terrain.Cross over locations such as deep valley at bridge, the high pier construction is inevitable.Existing high pier construction technology is divided from its method, and have 3 types: a kind of is climbing formwork for construction; A kind of is slding form operation; A kind of is over-form construction.In these three kinds of high pier constructions, creeping formwork, slding form operation all need bigger deadweight and control the requirement height, in present high pier construction, no longer are main stream approach therefore.And before turn over method constructing and overhanging model, be to create job platform, be to be employed in welding support on the template basically, the guardrail of setting up defences around, the welding of template and support is connected as a single entity in this method, promotes that operation is quite inconvenient, efficient is low and degree of safety is not high.
Summary of the invention
The technical problem that the present invention will solve is, provides a kind of bridge thin-walled hollow pier Chain block to promote job platform and job practices thereof, with overcome operation inconvenience that prior art exists, efficient is low and the not high deficiency of degree of safety.
The technical solution adopted for the present invention to solve the technical problems is: the hollow high pier Chain block of a cover bridge is installed outside pier shaft is promoted job platform, this job platform is made up of base, upper frame, intermediate support and platform Chain block.Promoting on the job platform, carrying out the over-form construction of Bridge High-pier, promptly accomplishing the process of assembling reinforcement in the Bridge High-pier construction, formwork erection, concreting, the demoulding.Easy to operate in order to turn over mould; Reserve a determining deviation between intermediate support and the template; Promote job platform both as template is installed and concrete is built operating platform; Temporary fixed skeleton when can be used as reinforcement installation again, but also the fully-enclosed safe protector during as pier construction promote power that job platform provides by Chain block and integral elevating.
Concrete structure of the present invention is following: it comprises base, upper frame, intermediate support and platform Chain block; Base connects intermediate support, and intermediate support connects upper frame; At 10cm place under the first segment template top, pvc pipe is placed at 10cm place under the second joint template top, in pvc pipe, is provided with reinforcing bar, be consolidated in above the Chain block on the reinforcing bar in the pvc pipe, below through wire rope connection base; Base comprises base inner frame, chassis outer side framework, is provided with the steel pipe hole seat of band latch above the i iron of chassis outer side framework; Be provided with the steel pipe hole seat of band latch above the outside i iron of upper frame.
The seat inner frame encircle pier shaft, with the pier shaft clear distance be 5cm.
Base adopts i iron to make, and i iron adopts No. 18.
Upper frame is done with the I-shaped steel, and i iron adopts No. 10.
Job practices of the present invention is following: it comprises following steps: the first, and Chain block promotes the job platform on-site consolidation; The second, Chain block promotes that job platform is in place, formwork erection, pour into, turn over mould; The 3rd, Chain block promotes job platform and removes.
Hollow pier Chain block of the present invention promotes job platform and constructs that not only speed of application is fast, labour intensity is low, and mounting system separates with template system, has improved safety, and is practical, on cost, also is superior to additive method.
Description of drawings
Fig. 1 promotes job platform sketch map, elevation for Chain block of the present invention;
Fig. 2 is I-I sectional view of Fig. 1.
The specific embodiment
Embodiments of the invention: Chain block promotes the explanation of job platform structure as follows: Chain block promotes job platform 1 and partly is made up of base 1-4, upper frame 1-1, intermediate support 1-2 and platform Chain block 1-3.
Base 1-4 comprises base inner frame 1-4-1, chassis outer side framework 1-4-2, is provided with the steel pipe hole seat 1-4-3 of band latch above the i iron of chassis outer side framework 1-4-2; Be provided with the steel pipe hole seat of band latch above the outside i iron of upper frame 1-1.
Base inner frame 1-4-1 encircles pier shaft 7, with pier shaft 7 clear distances be 5cm.The steel pipe hole seat 1-4-3 of the band latch that welds above the i iron of chassis outer side framework 1-4-2 is in order to fixed bearing top intermediate support 1-2, i.e. connection system for guide rail.
Base 1-4 i iron adopts No. 18.
Moving up of this platform 1 is through hanging above the platform Chain block 1-3 in being consolidated on the reinforcing bar that penetrates pre-buried pvc pipe 9 on the pier shaft, realizing through wire rope connection base 1-4 below.
Upper frame 1-1 is identical with the form of base 1-4, all is welded with the i iron assembly unit, and just the i iron model is less than base.Base 1-4 i iron 1-4-1 adopts No. 18, and the upper frame i iron adopts and can satisfy instructions for use No. 10.
Upper frame 1-1 outside i iron and base 1-4 consistent size, otherwise intermediate support is difficult to install.
Intermediate support 1-2 connects base 1-4 and upper frame 1-1; Adopt big, the lightweight steel pipe of rigidity to make connection system for guide rail, promptly use φ 48mm, the fastener type steel pipe of wall thickness 3.0mm supports; Like this, base 1-4, upper frame 1-1 and intermediate support 1-2 have just formed the frame space of a sealing.The framework outside and base are divided into anti-fall safety net, for the constructor provides a monolithic, totally enclosed construction operation space.
The platform Chain block 1-3 that this platform 1 promotes by 4 5t provides power, and 4 platform Chain block 1-3 are symmetrically distributed in the pier shaft both sides.
Platform Chain block 1-3 lower end links on the inboard i iron of base 1-4, the upper end be cemented in pier shaft 7 steel bars in concrete and link to each other.Reinforcing bar position: 10cm place at 10cm place under first segment template 2 tops, under the second joint template, 3 tops.During pier shaft 7 constructions, pre-buried pvc pipe 9 is reserved jack for the supporting reinforcing bar in pier shaft 7, and bar gauge is confirmed through calculating, is generally Φ 25 and gets final product.Fig. 2 is seen in the plan-position of supporting reinforcing bar preformed hole.
Chain block promotes job platform 1 general structure and sees Fig. 1.
The overall height of this platform 1 is confirmed according to actual conditions, to satisfy the constructing operation requirement.
Bridge thin-walled hollow pier Chain block promotes the job platform job practices and may further comprise the steps:
The first, Chain block promotes job platform 1 on-site consolidation.
, behind certain altitude, begin to install Chain block and promote job platform 1 in Bridge Pier Construction.Consider that these platform 1 overall dimensions are bigger, whole transhipment or lifting inconvenience, therefore, this platform 1 base 1-4 and the directly assembly unit on cushion cap 8 of intermediate support 1-2 connection system for guide rail.
The concrete assembly unit process that promotes job platform at assembly unit Chain block on the cushion cap 8 is following: at first on cushion cap 8, use auxiliary operating desk of steel leveling, this platform of assembly unit 1 base 1-4 on operating desk then.Every side is installed the main support crossbeam of 2 i iron as intermediate support 1-2 on base 1-4, and intermediate support 1-2 is made up of connection system for guide rail, adopts welding and then layering assembly unit connection system for guide rail between the i iron of base 1-4.Base 1-4 comprises base inner frame 1-4-1, chassis outer side framework 1-4-2; Base inner frame 1-4-1 encircles pier shaft; With the pier shaft clear distance be 5cm; Be welded with the steel pipe hole seat 1-4-3 of band latch above the i iron of chassis outer side framework 1-4-2, in order to fixed bearing top intermediate support 1-2, i.e. connection system for guide rail.Base 1-4 i iron adopts No. 18.Upper frame 1-1 adopts No. 10 i iron to be welded, the equally also corresponding steel pipe hole seat that is welded with the band latch above the outside i iron of upper frame 1-1.Upper frame 1-1 outside i iron and base 1-4 consistent size, otherwise intermediate support is difficult to install.Inboard i iron planar dimension than the big 20cm of pier shaft sectional dimension (referring to one-sided) about, to satisfy the needs of climbing shuttering.
The second, platform is 1 in place, formwork erection, pour into, turn over mould.
Undertaken by following order, the platform 1 that assembly unit is good is in place, and fixes with cushion cap 8; Elder generation's assembling reinforcement 4, upright again pier shaft external mold, the promptly upright first segment template 2 and the second joint template 3 are used interim constraint 6 fixedly the first segment template 2 and the second joint template 3; Lay pvc pipe 9, promptly 10cm place under first segment template 2 tops saves placement pvc pipe 9 in 10cm place under template 3 tops second.During pier shaft 7 constructions, pre-buried pvc pipe 9 is reserved jack for the supporting reinforcing bar in pier shaft 7, and bar gauge is confirmed through calculating, is generally Φ 25 and gets final product.Fig. 2 is seen in the plan-position of supporting reinforcing bar preformed hole.Because pier shaft is hollow high pier, so also will found internal mold.Concrete perfusion; Assembling reinforcement 4 (reinforcing bar is one section one section colligation, and assembling reinforcement here 4 is to prepare for concrete perfusion next time) waits concrete perfusion to solidify back first segment template 2 demouldings; Hang up first segment template 2 with external mold electric block 5; Upright first segment template 2 on the second joint template 3 is used fixedly first segment template 2 of interim constraint 6, promptly accomplishes and turns over mould.Upright internal mold, pvc pipe 9 is placed at the 10cm place under first segment template 2 tops; Concrete perfusion.Before platform 1 promoted, the reinforcing bar that at first penetrates at place, pre-buried pvc pipe 9 holes hung 5t platform Chain block 1-3 upper end on this reinforcing bar, and the lower end links the place, permanent position on base 1-4, and symmetry is unclamped following wire rope then.At this moment, under special messenger's commander,, slowly promote, keep synchronously, platform 1 is in lifting process steadily and safe condition all the time by four operators while operating platform Chain block 1-3.Platform 1 suitably slows down the rate of climb near both allocations the time, when platform 1 rise put in place after, regulate platform 1; Make and be in level; Lift-on/Lift-off System is installed then, is put down platform 1 gently, it is hung reposefully on embedded bar; Filling hardwood piece keeps the steady and safety of platform 1 in work progress with center rest between platform 1 base 1-4 i iron and pier shaft 7 then.Get into next circulation.
The 3rd, platform 1 is removed.
Pier construction is accomplished, and platform 1 is from top to bottom successively removed, and through tower crane respective members is hung to ground.
Chain block promotes the job platform advantage:
1) platform 1 separates with template system, has improved efficiency of construction and degree of safety.
2) utilize self system improving template, reduce the time that takies tower crane, accelerated construction speed.
3) simple to operate, just hold and apply with support.
4) the totally closed operation space has guaranteed construction safety.
Claims (8)
1. a bridge thin-walled hollow pier Chain block promotes job platform, and it is characterized in that: it comprises base (1-4), upper frame (1-1), intermediate support (1-2) and platform Chain block (1-3); Base (1-4) connects intermediate support (1-2), and intermediate support (1-2) connects upper frame (1-1); First segment template (2), the second joint template (3) are the pier shaft external mold; The 10cm place placement pvc pipe (9) at 10cm place under first segment template (2) top, under second joint template (3) top; Pre-buried pvc pipe (9) is in pier shaft (7) during pier shaft (7) construction; In pvc pipe (9), be provided with reinforcing bar, be consolidated in above the Chain block (1-3) on the reinforcing bar in the pvc pipe (9), connect base (1-4) through wire rope below; Base (1-4) comprises base inner frame (1-4-1), chassis outer side framework (1-4-2), is provided with the steel pipe hole seat (1-4-3) of band latch above the i iron of chassis outer side framework (1-4-2); Be provided with the steel pipe hole seat of band latch above the outside i iron of upper frame (1-1).
2. bridge thin-walled hollow pier Chain block according to claim 1 promotes job platform, and it is characterized in that: base inner frame (1-4-1) is encircled pier shaft (7), with pier shaft (7) clear distance be 5cm.
3. bridge thin-walled hollow pier Chain block according to claim 1 promotes job platform, it is characterized in that: base (1-4) adopts i iron to make, and i iron adopts No. 18.
4. bridge thin-walled hollow pier Chain block according to claim 1 promotes job platform, it is characterized in that: upper frame (1-1) is done with the I-shaped steel, and i iron adopts No. 10.
5. one kind promotes the job practices of job platform like the described bridge thin-walled hollow of the arbitrary claim of claim 1～4 pier Chain block, and it is characterized in that: it comprises following steps: the first, and Chain block promotes the job platform on-site consolidation; The second, Chain block promotes that job platform is in place, formwork erection, pour into, turn over mould; The 3rd, Chain block promotes job platform and removes;
In second step, carry out operation by following order, the Chain block that the first step assembly unit is good promotes the accurate back in place of job platform and fixes with cushion cap (8); Elder generation's assembling reinforcement (4), upright again pier shaft external mold, the promptly upright first segment template (2) and the second joint template (3) are used interim constraint (6) fixedly the first segment template (2) and the second joint template (3); Lay pvc pipe (9); Promptly at 10cm place under first segment template (2) top, pvc pipe (9) is placed at 10cm place under second joint template (3) top, when promptly pier shaft (7) was constructed, pre-buried pvc pipe (9) was in pier shaft (7); For the supporting reinforcing bar is reserved jack, upright inner membrance; Concrete perfusion; Assembling reinforcement (4); Concrete perfusion solidifies back first segment template (2) demoulding, hangs up first segment template (2) with external mold electric block (5), goes up upright first segment template (2) in the second joint template (3); With interim (6) the fixedly first segment template (2) that retrains, promptly accomplish and turn over mould; Upright internal mold, pvc pipe (9) is placed at the 10cm place under first segment template (2) top; Concrete perfusion; Before Chain block promotes the job platform lifting; At first penetrate reinforcing bar at place, pre-buried pvc pipe (9) hole; Platform Chain block (1-3) upper end is hung on this reinforcing bar; The lower end links on base (1-4), and symmetry is unclamped following wire rope then, and is synchronous by operating platform Chain block (1-3) lifting simultaneously of four operators and maintenance; Chain block promotes job platform and near both allocations the time, suitably slows down the rate of climb; Regulate platform after rising puts in place and be in level; Lift-on/Lift-off System is installed then, is put down Chain block gently and promote job platform, it is hung reposefully on reinforcing bar; Filling hardwood piece keeps the steady and safety of platform in work progress with center rest between base inner frame (1-4-1) that Chain block promotes job platform base (1-4) and pier shaft (7) then.
6. job practices according to claim 5 is characterized in that: in first step,, behind certain altitude, begin to install Chain block and promote job platform in Bridge Pier Construction; Consider that these platform overall dimensions are bigger, whole transhipment or lifting inconvenience are directly gone up assembly unit at cushion cap (8) with base (1-4), intermediate support (1-2) and upper frame (1-1).
7. job practices according to claim 6 is characterized in that: the concrete assembly unit process that goes up assembly unit Chain block lifting job platform at cushion cap (8) is following:
At first go up with auxiliary operating desk of steel leveling at cushion cap (8); The base (1-4) of this platform of assembly unit (1) on operating desk then; Go up every side at base (1-4) the main support crossbeam of 2 i iron as intermediate support (1-2) is installed; Intermediate support (1-2) is made up of connection system for guide rail, adopts welding and then layering assembly unit connection system for guide rail between the i iron of base inner frame (1-4-1), chassis outer side framework (1-4-2); Base inner frame (1-4-1) is encircled pier shaft (7); With the pier shaft clear distance be 5cm; Being welded with the steel pipe hole seat (1-4-3) of band latch above the i iron of chassis outer side framework (1-4-2), is connection system for guide rail in order to fixed bearing top intermediate support (1-2); The equally also corresponding steel pipe hole seat that is welded with the band latch above the outside i iron of upper frame (1-1); Upper frame (1-1) outside i iron and base (1-4) consistent size.
8. job practices according to claim 5 is characterized in that: at third step, treat the pier construction completion, Chain block promotes job platform and from top to bottom successively removes, and through tower crane respective members is hung to ground.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110060626 CN102230313B (en) | 2011-03-14 | 2011-03-14 | Bridge thin-wall hollow-pier chain block hoisting operation platform and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110060626 CN102230313B (en) | 2011-03-14 | 2011-03-14 | Bridge thin-wall hollow-pier chain block hoisting operation platform and construction method thereof |
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| CN102230313A CN102230313A (en) | 2011-11-02 |
| CN102230313B true CN102230313B (en) | 2012-12-05 |
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| CN102561196A (en) * | 2012-01-04 | 2012-07-11 | 浙江永峰模具制造有限公司 | Turnover construction process of high-pier forms |
| CN104695331B (en) * | 2013-12-10 | 2016-09-28 | 张家界航空工业职业技术学院 | A kind of building construction hoist |
| CN104846745B (en) * | 2015-03-19 | 2017-01-11 | 南通大学 | Urban high-pier support-free formwork turnover construction method |
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| CN110080118A (en) * | 2019-06-04 | 2019-08-02 | 中交一公局第一工程有限公司 | Vertical transport for slding form operation rises system and its construction method certainly |
| CN111705677A (en) * | 2020-07-07 | 2020-09-25 | 中国十七冶集团有限公司 | A smooth frame that rises for high pier stud turns over mould construction |
| CN114319717B (en) * | 2020-09-30 | 2022-10-14 | 华中科技大学 | Prefabricated assembled steel-concrete composite beam |
| CN112726517A (en) * | 2020-10-21 | 2021-04-30 | 云南建投第一勘察设计有限公司 | Construction method of aqueduct above bridge |
| CN113882276A (en) * | 2021-11-19 | 2022-01-04 | 中冶建工集团有限公司 | Working platform for erecting bridge pier and construction method thereof |
| CN113914595A (en) * | 2021-11-24 | 2022-01-11 | 广西长兴工程建设有限公司 | Assembled cylinder mound operation platform |
| CN113914232B (en) * | 2021-11-25 | 2023-04-25 | 中铁广州工程局集团桥梁工程有限公司 | High main tower inner formwork and scaffold integrated construction system and method |
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