CN103485574A - Method for constructing reinforced concrete structure of tower top of prilling tower - Google Patents
Method for constructing reinforced concrete structure of tower top of prilling tower Download PDFInfo
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Abstract
The invention discloses a method for constructing a reinforced concrete structure of the tower top of a prilling tower. An n-shaped frame serves as a supporting rod piece for fixing an inner platform and an outer platform of a sliding mold and the reinforced concrete structure of the tower top of the prilling tower is constructed directly through the inner platform and the outer platform of the sliding mold, wherein the inner platform and the outer platform serve as a formwork supporting system and an operation platform respectively. The method for constructing the reinforced concrete structure mainly comprises the following steps that the sliding mold below an annular girder is constructed, reinforcing steel bars are inserted in the annular girder and a formwork slides aloft, hydraulic systems except for a hydraulic jack are detached, reinforced concrete below the n-shaped frame is constructed, the hydraulic jack is detached, annular girder reinforced concrete below the bottom of a steel reinforced concrete structure girder is constructed, steel trusses of the steel reinforced concrete structure girder are placed in position and assembled, the reinforced concrete structure of the tower top is constructed, concrete is maintained, and the platforms are placed downwards. According to the method for constructing the reinforced concrete structure of the tower top of the prilling tower, the inner platform and the outer platform of the sliding mold are directly used as the formwork supporting system and the operation platform of the cast-in-place reinforced concrete structure of the tower top of the prilling tower respectively, work does not need to be conducted aloft, the safety of construction of the reinforced concrete structure of the tower top is guaranteed, the construction cost is reduced, and the construction efficiency is improved.
Description
Technical field
The invention belongs to the reinforced concrete construction technical field, relate to a kind of granulation tower job practices, specifically relate to a kind of granulation tower tower top structure of reinforced concrete method.
Background technology
Granulation tower is comprised of circular king-tower and square building escalator, and layout is circumference combination, the cylindrical shape reinforced concrete structure that circular king-tower interior diameter is 15～19m, high 90～116.3m; The building escalator is 9.50m * 4.50m, highly is the square tube shape reinforced concrete structure of 90～116.3m, and its internal main will provide upper and lower passage for granulation tower by elevator shaft and steel ladder.As shown in Figure 2, the granulation tower top layer is monolithic reinforced concrete structure, the annular girder that tower body 1 outer wall is 500 * 2000, the reinforced concrete beam and plate be comprised of 2 Structural Steel Reinforced Concrete beams 2 and relevant beam slab 3 in tower body 1.
At present, the general hydraulic sliding mould construction technology that adopts of the cylindrical shell of granulation tower construction, after slding form operation finishes, sliding mode system is in suspension status, and its below is without any the member that can be used as support and operating platform.Due to Structural Steel Reinforced Concrete beam section large (680mm * 1600mm), span large (18m), highly very high (114m), its shuttering supporting is absolute high formwork support system, so security risk is high.
For addressing the above problem, the main job practices adopted has two kinds at present:
(1) in tower top stay in place formwork support system absolute altitude section, formwork bracing system built-in fitting and hole to be provided are set; when slip-form template slides into annular bottom elevation, stop sliding; set up interim people from station platform (personnel hang pin and carry out on hand inside and outside standing in); then remove sliding mode system; utilize temporary platform to implement formwork bracing system and operating platform construction; shuttering supporting should reach load tower wall (utilizing built-in fitting), and completes the tower top structure of reinforced concrete.Adopt the existing deficiency of this job practices to be: only can meet repairing and the maintenance of concrete surface during sliding formwork with inside and outside platform hanger due to sliding formwork, width only has 800～900mm, utilizes it to set up the temporary platform inconvenient operation, and effect is low; In order to meet load and the action need of tower top construction, formwork bracing system must meet certain intensity, rigidity and stability requirement, and workload and steel using amount are all very large, and extensive work all belongs to work high above the ground, and security risk is high, the duration of a project is longer.
(2) when template sliding lifting to shower nozzle layer when bottom, utilize built-in fitting to hang on concrete tube wall the sliding formwork rigid platfor, again set up flexibility platform and proceed the slding form operation of the above steel concrete cylindrical shell of shower nozzle layer, after slding form operation finishes, remove immediately whole sliding mode system, again utilize the sliding formwork rigid platfor be retained in shower nozzle layer bottom construct from bottom to up shower nozzle layer, mixed layer, hold water layer and tower top construction.Adopt this job practices, because the steel concrete cylindrical shell slding form operation more than the shower nozzle layer is to utilize interim flexibility platform, construction quality and safety is difficult control all; In order to meet load and the action need of the construction of shower nozzle layer, inner platform will have enough rigidity, must increase intensity, rigidity and the stability requirement that the temporary supporting system meets shower nozzle layer formwork bracing system simultaneously; Due to tower top beam and slab structure and shower nozzle layer, hold water layer not on same vertical plane, will inevitably increase the tower top reinforced concrete beam and plate formwork bracing system set up workload, and extensive work all belongs to work high above the ground, there are equally the deficiencies such as security risk is high, construction cost is high, efficiency is low, the duration of a project is long.
Summary of the invention
The object of the invention is to for the existing deficiency of existing granulation tower tower top reinforced concrete construction method, provide that a kind of working security is high, construction cost is low, the granulation tower tower top structure of reinforced concrete method that construction speed is fast.
The objective of the invention is to be achieved by following technical solution.
A kind of granulation tower tower top structure of reinforced concrete method, utilize the supporting rod of portal as outer platform in fixing sliding formwork, directly utilize outer platform in sliding formwork as formwork bracing system and operating platform, granulation tower tower top reinforced concrete structure to be constructed, its main construction method step is as follows:
(1) the following slding form operation of annular girder: according to the granulation tower tower wall below conventional slding form operation method construction annular girder;
(2) annular girder joint bar and template are empty sliding: when slding form operation during to annular girder joint bar starting point, carrying out the following tower wall of annular girder reinforcing bar binding installs, and empty sliding template makes portal crossbeam top arrive annular bottom elevation, immediately that the concrete casting flat die plate is suitable for reading, stop template sliding lifting;
(3) remove hydraulic system and the following reinforced concrete construction of door type frame beyond hydraulic jack: described hydraulic pressure comprises material and the facility that the illuminator on oil pipe in hydraulic control panel, hydraulic system and pipe fitting, suspension bracket etc. and follow-up construction are irrelevant, the following tower wall of the portal steel concrete of simultaneously constructing, be supported on the concrete towers wall portal crossbeam reliably;
(4) remove hydraulic jack: after more than concrete strength reaches 2MP, remove hydraulic jack.
(5) following annular girder steel concrete and utilize inner platform to carry out the installation of Structural Steel Reinforced Concrete beam beam bottom mother plate at the bottom of construction Structural Steel Reinforced Concrete beam beam;
(6) Structural Steel Reinforced Concrete joist steel truss assembling in place, improve tower top beam slab concrete blinding support system;
(7) tower top concrete structure construction: according to designing requirement, carry out tower top beam slab, annular girder reinforcing bar, template and concrete construction;
(8) concrete curing and platform are transferred: after the beam slab concrete strength reaches design strength, the stripping support system is carried out platform and is transferred, and carries out the successive projects construction.
When in described step (2), slding form operation arrives design elevation, the concrete casting flat die plate is suitable for reading, stop the sliding of template, only remove illuminator on hydraulic control panel, oil circuit, suspension bracket etc. and follow-up construction irrelevant material and facility, and do not remove platform, template and the template Hoisting System in sliding mode system.
Adopt the main support rod member of portal crossbeam as the tower top concrete structure construction in described step (7).
In described step (6), utilize Structural Steel Reinforced Concrete joist steel truss to improve tower top beam slab concrete blinding support system.
The invention has the beneficial effects as follows:
Compared with prior art, the present invention directly utilizes the supporting rod of portal as outer platform in fixing sliding formwork, and in the recycling sliding formwork, outer platform is as formwork bracing system and the operating platform of granulation tower tower top monolithic reinforced concrete structure.Do not need to set up in addition supporting member and the operating platform of the formwork bracing system of tower top structure construction, do not have work high above the ground, greatly reduced security risk; Improved the effective rate of utilization of outer platform in sliding formwork, granulation tower of every construction can reduce approximately 200,000 yuan of construction costs, greatly reduces construction cost; But more 20 days each engineering reduction of erection time, shortened the construction period greatly, improved efficiency of construction.The steel truss taken full advantage of in the Structural Steel Reinforced Concrete beam improves tower top beam slab concrete blinding support system, has guaranteed tower top beam slab concrete structure construction safety.
The accompanying drawing explanation
Fig. 1 is granulation tower tower top structure of reinforced concrete process chart of the present invention;
Fig. 2 is granulation tower tower top layout schematic diagram;
Fig. 3 is that template stops sliding structural representation;
Fig. 4 is the following reinforced concrete construction schematic diagram of portal crossbeam;
Fig. 5 is structural representation after the dismounting hydraulic jack;
Fig. 6 is the above structure construction schematic diagram of hydraulic jack head piece.
In figure: 1-tower body, 2-Structural Steel Reinforced Concrete beam, 3-beam slab, the 4-door type frame, 5-template, column at the bottom of the 6-beam, 7-tower top concrete structure, 8-inner platform, the 9-bar of sweeping the floor, 10-fore shaft bar, 11-pull bar, 12-supporting rod, the 13-hydraulic jack, 14-outer platform, the outer suspension bracket of 15-, the 16-internal hanger, the holder of 17-steel.
The specific embodiment
Further describe technical scheme of the present invention below in conjunction with the embodiment accompanying drawing, but that claimed scope is not limited to is described.
As shown in Figure 1, a kind of granulation tower tower top structure of reinforced concrete method of the present invention, the method is to utilize the supporting rod of portal as outer platform in fixing sliding formwork, directly utilize outer platform in sliding formwork as formwork bracing system and operating platform, granulation tower tower top reinforced concrete structure to be constructed, its main construction method step is as follows:
(1) the following slding form operation of annular girder: according to the granulation tower tower wall below conventional slding form operation method construction annular girder;
(2) annular girder joint bar and template are empty sliding: when slding form operation during to annular girder joint bar starting point, carrying out the following tower wall of annular girder reinforcing bar binding installs, and empty sliding template makes portal crossbeam top arrive annular bottom elevation, immediately that the concrete casting flat die plate is suitable for reading, stop template sliding lifting;
(3) remove hydraulic system and the following reinforced concrete construction of door type frame beyond hydraulic jack: described hydraulic pressure comprises material and the facility that the illuminator on oil pipe in hydraulic control panel, hydraulic system and pipe fitting, suspension bracket etc. and follow-up construction are irrelevant, the following tower wall of the portal steel concrete of simultaneously constructing, be supported on the concrete towers wall portal crossbeam reliably;
(4) remove hydraulic jack: after more than concrete strength reaches 2MP, remove hydraulic jack;
(5) following annular girder steel concrete and utilize inner platform to carry out the installation of Structural Steel Reinforced Concrete beam beam bottom mother plate at the bottom of construction Structural Steel Reinforced Concrete beam beam;
(6) Structural Steel Reinforced Concrete joist steel truss assembling in place, improve tower top beam slab concrete blinding support system; In this step, utilize Structural Steel Reinforced Concrete joist steel truss to improve tower top beam slab concrete blinding support system, thereby guarantee tower top beam slab concrete structure construction safety.
(7) tower top concrete structure construction: according to designing requirement, carry out tower top beam slab, annular girder reinforcing bar, template and concrete construction; Adopt the main support rod member of portal crossbeam as the tower top concrete structure construction in this step, do not need to set up in addition supporting member and the operating platform of the formwork bracing system of tower top structure construction, do not have work high above the ground, reduced security risk;
(8) concrete curing and platform are transferred: after the beam slab concrete strength reaches design strength, the stripping support system is carried out platform and is transferred, and carries out the successive projects construction.
When in above-mentioned steps (2), slding form operation arrives design elevation, the concrete casting flat die plate is suitable for reading, stop the sliding of template, only remove illuminator on hydraulic control panel, oil circuit, suspension bracket etc. and follow-up construction irrelevant material and facility, and do not remove platform, template and the template Hoisting System in sliding mode system.
Below in conjunction with case study on implementation, construction sequence of the present invention is described in further details.
(1) preparation: need ready work before granulation tower tower top construction, described preparation comprise the establishment of the special constructure scheme of tower top structure and report to a higher authorities for approval, the preparation of making, annular girder reinforcement fabrication, tower top structure construction material and the construction equipment of Structural Steel Reinforced Concrete joist steel truss;
(2) annular girder joint bar and template are empty sliding: as shown in Figure 3, when slding form operation (template 5 is suitable for reading) during to the 113.5m absolute altitude, carry out the following tower wall of annular girder reinforcing bar (joint bar) colligation and install, and empty sliding template makes the crossbeam top of portal 4 arrive annular bottom elevation (template absolute altitude suitable for reading is 114.66m);
(3) as shown in Figure 3, the level and smooth mould template 5 of concreting is suitable for reading, stops template 5 sliding, to increase the frictional force and the stability of guaranteeing interior outer platform of concrete to template 5;
(4) remove the hydraulic system (comprising oil pipe and pipe fitting in hydraulic control panel, hydraulic system) beyond hydraulic jack 13, the illuminator on suspension bracket etc. and follow-up construction irrelevant material and facility, as shown in Figure 4, the following tower wall of portal 4 steel concrete of simultaneously constructing, be supported on the concrete towers wall portal 4 crossbeams reliably;
(5) as shown in Figure 5,, after more than concrete strength reaches 2MP, remove hydraulic jack 13;
(6) following annular girder steel concrete and utilize inner platform 8 to carry out the installation of Structural Steel Reinforced Concrete beam beam bottom mother plate at the bottom of construction Structural Steel Reinforced Concrete beam beam; As shown in Figures 3 to 6, directly utilize sliding formwork inner platform 8 and outer platform 14 as support system and the operating platform of template 5, annular girder steel concrete to be constructed;
(7) steel truss of Structural Steel Reinforced Concrete beam assembling in place, improve tower top beam slab concrete blinding support system, as shown in Figure 6, directly utilize portal 4 as the fixing supporting rod of sliding formwork inner platform 8 and outer platform 14, recycling sliding formwork inner platform 8 and outer platform 14 are as formwork bracing system and the operating platform of granulation tower tower top monolithic reinforced concrete structure, set up cross beam and upright post 6 on inner platform 8, the bar 9 of sweeping the floor, fore shaft bar 10 and supporting rod 12, inner and outer template 5 is fixing by pull bar 11, when improving tower top beam slab concrete blinding support system, the bar 9 of sweeping the floor is less than 200mm apart from inner platform 8, fore shaft bar 10 is less than 300mm apart from the beam base plate, to guarantee the stability of support system, increase the security performance of whole template system construction,
(8) carry out tower top beam slab, annular girder reinforcing bar, template and concrete construction by the requirement of the special constructure scheme of tower top structure;
(9), after the beam slab concrete strength reaches design strength, the stripping support system is carried out platform and is transferred, and carries out the successive projects construction, as shown in Figure 6, the above structure of hydraulic jack head piece is constructed;
Compared with prior art, the present invention has advantages of that the duration is short, cost is low, applied the technical program in 2 * 150,000 ton/years of nitro-compound fertilizer projects of Kai Lin Xifeng, Guizhou synthetic ammonia company, this project is the Petronas Towers that circular king-tower and square building escalator form, layout is dumbbell shape, circular king-tower interior diameter is 18m, the cylindrical shape reinforced concrete structure of high 117m; The building escalator is 10m * 6m square tube shape structure, height 117m, and reinforced concrete structure, its internal main will provide upper and lower passage for granulation tower by elevator shaft and steel ladder.This granulation tower top layer is monolithic reinforced concrete structure, the annular girder that cylinder body outer wall is 500 * 2000, the reinforced concrete beam and plate be comprised of 2 JL-2 Structural Steel Reinforced Concrete beams and relevant beam slab in tower body.Adopt technical scheme of the present invention to obtain effect preferably in this project: this project construction, in sliding formwork end on November 30th, 2012, has completed the form removable of tower top reinforced concrete structure on December 28th, 2012.Complete steel girder erection 30t, beam reinforced steel bar concrete construction 520m3 in the tower top construction, only used 28 days, greatly shortened the construction period, improved efficiency of construction; Because the present invention directly utilizes the sliding formwork door type frame, outer platform in sliding formwork is fixed on steel concrete tower wall, supporting member and operating platform as the formwork bracing system of tower top monolithic reinforced concrete structure, reduced the input of temporary platform and formwork bracing system, greatly reducing construction cost, is cost-saving approximately 200,000 yuan of project.
Claims (4)
1. a granulation tower tower top structure of reinforced concrete method, it is characterized in that: utilize the supporting rod of portal as outer platform in fixing sliding formwork, directly utilize outer platform in sliding formwork as formwork bracing system and operating platform, granulation tower tower top reinforced concrete structure to be constructed, its main construction method step is as follows:
(1) the following slding form operation of annular girder: according to the granulation tower tower wall below conventional slding form operation method construction annular girder;
(2) annular girder joint bar and template are empty sliding: when slding form operation during to annular girder joint bar starting point, carrying out the following tower wall of annular girder reinforcing bar binding installs, and empty sliding template makes portal crossbeam top arrive annular bottom elevation, immediately that the concrete casting flat die plate is suitable for reading, stop template sliding lifting;
(3) remove hydraulic system and the following reinforced concrete construction of door type frame beyond hydraulic jack: described hydraulic pressure comprises material and the facility that the illuminator on oil pipe in hydraulic control panel, hydraulic system and pipe fitting, suspension bracket etc. and follow-up construction are irrelevant, the following tower wall of the portal steel concrete of simultaneously constructing, be supported on the concrete towers wall portal crossbeam reliably;
(4) remove hydraulic jack: after more than concrete strength reaches 2MP, remove hydraulic jack.
(5) following annular girder steel concrete and utilize inner platform to carry out the installation of Structural Steel Reinforced Concrete beam beam bottom mother plate at the bottom of construction Structural Steel Reinforced Concrete beam beam.
(6) Structural Steel Reinforced Concrete joist steel truss assembling in place, improve tower top beam slab concrete blinding support system.
(7) tower top concrete structure construction: according to designing requirement, carry out tower top beam slab, annular girder reinforcing bar, template and concrete construction:
(8) concrete curing and platform are transferred: after the beam slab concrete strength reaches design strength, the stripping support system is carried out platform and is transferred, and carries out the successive projects construction.
2. a kind of granulation tower tower top structure of reinforced concrete method according to claim 1, it is characterized in that: when in described step (2), slding form operation arrives design elevation, the concrete casting flat die plate is suitable for reading, stop the sliding of template, only remove illuminator on hydraulic control panel, oil circuit, suspension bracket etc. and follow-up construction irrelevant material and facility, and do not remove platform, template and the template Hoisting System in sliding mode system.
3. a kind of granulation tower tower top structure of reinforced concrete method according to claim 1, is characterized in that: adopt the main support rod member of portal crossbeam as the tower top concrete structure construction in described step (7).
4. a kind of granulation tower tower top structure of reinforced concrete method according to claim 1, is characterized in that: in described step (6), utilize Structural Steel Reinforced Concrete joist steel truss to improve tower top beam slab concrete blinding support system.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103993739A (en) * | 2014-05-19 | 2014-08-20 | 中化二建集团有限公司 | Method for constructing stiff beam of spraying layer of prilling tower |
| CN104594631A (en) * | 2015-02-05 | 2015-05-06 | 中化二建集团有限公司 | Construction process for constructing prilling tower spraying layer by slide mold device dragging construction platform |
| CN108952145A (en) * | 2018-08-31 | 2018-12-07 | 宁夏亿丰建设工程有限公司 | It is a kind of to utilize the support for shuttering that eaves gutter is overhang outside sliding formwork outer platform carrying silo |
| CN109138415A (en) * | 2018-09-14 | 2019-01-04 | 五冶集团上海有限公司 | The formwork erecting structure and its construction method of eaves gutter are overhang outside silo |
| CN111749456A (en) * | 2020-07-16 | 2020-10-09 | 江苏省江建集团有限公司 | Synchronous construction method for cantilever structure and tower body main body of lookout tower |
Families Citing this family (1)
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| CN106639500B (en) * | 2016-12-22 | 2019-01-11 | 广西建工集团第一建筑工程有限责任公司 | Slding form operation method of square variable-section multilayer platform chimney under high wind pressure |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103993739A (en) * | 2014-05-19 | 2014-08-20 | 中化二建集团有限公司 | Method for constructing stiff beam of spraying layer of prilling tower |
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| CN109138415A (en) * | 2018-09-14 | 2019-01-04 | 五冶集团上海有限公司 | The formwork erecting structure and its construction method of eaves gutter are overhang outside silo |
| CN111749456A (en) * | 2020-07-16 | 2020-10-09 | 江苏省江建集团有限公司 | Synchronous construction method for cantilever structure and tower body main body of lookout tower |
| CN111749456B (en) * | 2020-07-16 | 2021-11-12 | 江苏省江建集团有限公司 | Synchronous construction method for cantilever structure and tower body main body of lookout tower |
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| CN103485574B (en) | 2015-11-18 |
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