CN104831928B - High-altitude long-span concrete conjoined structure shuttering supporting steel platform construction method - Google Patents

High-altitude long-span concrete conjoined structure shuttering supporting steel platform construction method Download PDF

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CN104831928B
CN104831928B CN201510290532.8A CN201510290532A CN104831928B CN 104831928 B CN104831928 B CN 104831928B CN 201510290532 A CN201510290532 A CN 201510290532A CN 104831928 B CN104831928 B CN 104831928B
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steel
girder
main
vierendeel girder
platform
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CN104831928A (en
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朱建平
袁康
李雷
薛龙辉
王谋龙
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Changzhou No1 Construction Group Co Ltd
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Changzhou No1 Construction Group Co Ltd
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Abstract

The present invention provides a kind of high-altitude long-span concrete conjoined structure shuttering supporting steel platform construction method, including step: 1. determines steel putting up platform position, 2. arrange safety net, 3. build steel platform, 4. arrange to lay on brace group, 5. steel platform and set up double-pole scaffold on flitch and plank, 6. steel platform, 7. set up conjoined structure falsework system, 8. high-altitude long-span concrete conjoined structure ground floor construction, the 9. construction of the high-altitude long-span concrete conjoined structure second layer.Present invention process is simple, can effectively reduction of erection time, reduction engineering cost, reduce labor intensity, construction safety reliable.

Description

High-altitude long-span concrete conjoined structure shuttering supporting steel platform construction method
Technical field
The present invention relates to conjoined structure construction techniques technical field, be specifically related to a kind of high-altitude long-span concrete even Body stay in place form steel supporting platform construction method.
Background technology
Rare due to land resource, continuous progressive along with the development of economic society and Building technology, city ultra-high conducting Build increasing.High-rise building use high-altitude disjunctor, high-altitude long-span overhung structure design the most common;Wherein, phase Between adjacent two high-rise buildings (being commonly called as Shuangzi building) by the high-altitude long-span interconnective design of concrete conjoined structure and Build relatively conventional.High-altitude long-span concrete conjoined structure is due to its spy such as distance ground is high, span is big, construction loads is big Point, thus use the common high-supported formwork mode of traditional full hall console model to construct, need to set up the steel pipe feet that the scale of construction is huge , there is completion time of project length, labor intensity greatly in hand cradle, engineering cost is high, big, the working security relatively Customers ' Legal Right of occupied ground etc. of constructing All drawbacks.Thus, overcome the drawback of existing construction method, design a set of high-altitude long-span concrete between two high buildings The new method of conjoined structure construction seems the most necessary.
Summary of the invention
It is an object of the invention to: provide a kind of technique simple, can effectively the reduction of erection time, reduce cost, lighten one's labor by force Degree, safe and reliable high-altitude long-span concrete conjoined structure shuttering supporting steel platform construction method.
The technical scheme is that the high-altitude long-span concrete conjoined structure shuttering supporting steel platform construction of the present invention Method, comprises the following steps:
1. steel putting up platform position is determined: according to designing the high-altitude long-span concrete conjoined structure determined at the first main building Position between frame structure and the second main building frame structure, take the first main building frame structure and the second main building frame structure it Between be positioned at below high-altitude long-span concrete conjoined structure one layer as steel putting up platform position;
2. safety net is set: below the predetermined steel platform set up, tiling safety chooses net;
3. steel platform is built:
The first step: install the main girder steel of framework intercolumniation of steel platform: the main girder steel of framework intercolumniation arranges quantity and the first main building frame The quantity of the frame column of shelf structure and the second main building frame structure is identical;Each frame column of the first main building frame structure and the second master On each second frame column of building frame structure, pre-plugged has main girder steel first built-in connection of predetermined coupling parts;Framework intercolumniation Main girder steel is welded with main girder steel the first built-in connection by its two ends;
Second step: main girder steel between the Vierendeel girder of installation steel platform:
If the absolute altitude of the second Vierendeel girder of the Vierendeel girder of the first main building frame structure and the second main building frame structure is identical, Main girder steel second built-in connection of pre-buried one group of predetermined coupling parts on Vierendeel girder and the second Vierendeel girder;Main girder steel between each Vierendeel girder Two ends fix add connecting plate after pre-buried with on Vierendeel girder and the second Vierendeel girder respectively main girder steel the second built-in connection solid Fixed connection;
If the absolute altitude of the second Vierendeel girder of the Vierendeel girder of the first main building frame structure and the second main building frame structure is different, Main girder steel second built-in connection of one group of predetermined coupling parts it is embedded with on second Vierendeel girder;One end of main girder steel between each Vierendeel girder The corresponding fixing connection of each main girder steel second built-in connection pre-buried on the second Vierendeel girder;The lower end of Vierendeel girder and Vierendeel girder Upper end, one layer of beam face, lower end is respectively provided with one group of pre-buried junction steel plate the most respectively and upper and lower two ends are welded with pre-buried junction steel plate One group connection steel column, connect steel column top be fixed with the steel corbel grown;Between each Vierendeel girder, the other end of main girder steel is put It is placed on steel corbel and welds;
Between each Vierendeel girder, the upper surface of main girder steel and the upper surface of each main girder steel of framework intercolumniation are in same level;Respectively Between Vierendeel girder, the spacing between main girder steel determines according to design;
3rd step: the secondary girder steel of installation steel platform: main girder steel between the main girder steel of framework intercolumniation installed and Vierendeel girder By design pitch, time girder steel is set;Between secondary girder steel girder steel main with framework intercolumniation and Vierendeel girder, main girder steel intersects vertically and the company of welding Connect;Being welded with vertical rod grafting pipe on each girder steel in advance, quantity and the position of vertical rod grafting pipe determine according to design;
4. brace group be set:
The first step: be positioned at the ground floor above steel platform and in the first main building frame structure and the second main building frame structure The most each pre-buried 2 groups of the side of the Vierendeel girder of two layers of both sides amounts to 8 groups of brace built-in connections;
Second step: determine that 2 main girder steels of framework intercolumniation accept girder steel as pull-up, at 2 selected frame columns according to design Between the most each selected 4 pull-up nodes on main girder steel, welding inclination angle on each pull-up node is 45~600The connecting plate at angle;
3rd step: install brace group: brace group includes 4 first braces and 4 second braces;These 4 The corresponding welding of connecting plate that the lower end of one brace is arranged with each 2 the pull-up nodes on 2 main girder steels of framework intercolumniation respectively;Should The upper end of 4 first braces is positioned at above steel platform respectively with the first main building frame structure and the second main building frame structure 4 groups of brace built-in connections altogether that the side of the Vierendeel girder of two layers of both sides is pre-buried are hinged;The lower end of these 4 second braces Respectively with the most each 2 the corresponding welding of connecting plate pulling up nodes on 2 main girder steels of framework intercolumniation;These 4 second braces Upper end be positioned at the frame of the ground floor both sides above steel platform with the first main building frame structure and the second main building frame structure respectively It is hinged that what the side set a roof beam in place was pre-buried amounts to 4 groups of brace built-in connections;
5. laying flitch and plank on steel platform: completely spread flitch on secondary girder steel and fasten, on flitch, full boarding is also Stickfast;
6. double-pole scaffold is set up on steel platform: on steel platform and in the outside of steel platform, set up double-pole scaffold;And Skirting board is set;Dense mesh screen is completely pricked in the outside of double-pole scaffold;
7. conjoined structure falsework system is set up: conjoined structure falsework system includes vertical rod, jacking, cross bar, tiltedly Supporting steel pipe, bridging and conjoined structure ground floor support shuttering;
The first step: piece vertical rod of each grafting respectively in each vertical rod grafting pipe on secondary girder steel;The upper end of vertical rod sets Top set torr;
Second step: between vertical rod arrange before and after to and left and right to cross bar, each cross bar connects with corresponding vertical rod fastener Firmly;
3rd step: the 3 road bearing diagonal steel pipes to vertical rod unloading are set between vertical rod and Vierendeel girder;In vertical rod and second 3 roads bearing diagonal steel pipe (64) to vertical rod unloading are set between Vierendeel girder;
4th step: the surrounding in vertical rod and the framework of cross bar composition arranges bridging;
5th step: be provided above conjoined structure ground floor support shuttering at jacking;
8. conjoined structure ground floor construction: construct on conjoined structure ground floor support shuttering, complete conjoined structure first Layer balances;
9. the conjoined structure second layer construction: build once again above the conjoined structure ground floor completed balances by vertical rod, Jacking, cross bar, bearing diagonal steel pipe, bridging and conjoined structure second layer support shuttering, then support at the conjoined structure second layer Construct in template, complete the conjoined structure second layer and balance.
Further scheme is: main girder steel second built-in connection of above-mentioned predetermined coupling parts is for burying ferrum and 2M24 anchor Bolt.
Further scheme is: above-mentioned main girder steel the first built-in connection is by pre-buried 16mm steel plate embedded part and company Connect the steel corbel of Plate Welding;Between the above-mentioned main girder steel of framework intercolumniation and Vierendeel girder, main girder steel is H profile steel beam and in advance Arch camber 30mm is to resist girder steel deflection deformation;Secondary girder steel is 16# I-steel.
Further scheme is: the pre-buried company arranged on the lower end of above-mentioned Vierendeel girder and beam face, one layer, the lower end of Vierendeel girder Connecing steel plate is 16mm steel plate embedded part;Brace built-in connection is that the 16mm thickness being welded with and connecting otic placode buries ferrum.
Further scheme is: the above-mentioned steel pipe that vertical rod grafting pipe is internal diameter 25mm;The first of brace group Brace and 4 second braces are the round steel of diameter 30mm.
Further scheme is: above-mentioned step the most also includes:
6th step: supplementary protection facility is set: adds at the main girder steel power transmission position of Vierendeel girder with steel platform and hangs muscle and hoop Muscle;Hang the reinforcing bar that muscle is 2 diameter 20mm;Stirrup diameter is identical with the former stirrup of Vierendeel girder, and every side arranges 3, setting space 50mm;And retain steel platform underlying first layer, the beam bottom mother plate that balances of the lower section second layer supports and does not removes, and bears steel to increase The load-carrying ability of the Vierendeel girder of platform.
The present invention has positive effect: (1) present invention is by needing the high-altitude long-span concrete disjunctor built to tie The lower section correct position of structure utilizes the frame foundation of adjacent 2 main buildings built up, and first sets up the steel by shaped steel is main structure and puts down Platform is as high-formwork construction platform, then sets up steel pipe scaffold on steel platform and supporting template system carries out high-altitude long-span and mixes The construction of solidifying soil conjoined structure, thus the setting up of steel pipe scaffold can be greatly reduced such that it is able to effectively reduction of erection time, saving Construction cost, reducing labor intensity, and occupied ground is little, working security is good.(2) present invention is each by arranging twice The load of steel platform is unloaded by secondary " splayed configuration " oblique rollering steel pull bar, reduces the whole bearing system H type to steel platform The stress of steel girder steel, adds the safe and stable property of whole support platform;Meanwhile, by arranging diagonal brace steel pipe to support shuttering The vertical rod of system unloads, and reduces the vertical rod load to steel platform girder steel, further increases whole load bearing support system Stability, so that steel platform stress is clear and definite, safe and reliable.(3) present invention is huge by stretch-draw one below steel platform Horizontal safety protection network, further increases construction safety.(4) construction method of the present invention is simple and reliable, and construction technology is easy Grasping, use description of materials few, it is convenient to remove, and recovery utilization rate is high, economical rationality.
Accompanying drawing explanation
Fig. 1 is the planar structure schematic diagram of the high-supported formwork steel platform that the present invention utilizes built building structure to set up;
Fig. 2 is that the cross-section structure after the present invention utilizes built building structure that the steel platform set up is arranged brace shows It is intended to;
Fig. 3 is the structural representation at Fig. 2 interior joint A;
Fig. 4 is the structural representation at Fig. 2 interior joint B;
Fig. 5 is the top view of Fig. 4;
Fig. 6 is the structural representation at Fig. 2 interior joint C;
Fig. 7 is the present invention standing the form bracing system that balances that the construction of high-altitude long-span concrete conjoined structure is used Face schematic diagram;
Fig. 8 is the flow chart of the present invention.
Reference in above-mentioned accompanying drawing is as follows:
First main building frame structure 1, frame column 11, Vierendeel girder 12,
Second main building frame structure 2, the second frame column 21, the second Vierendeel girder 22,
Predetermined coupling parts 3, main girder steel the first built-in connection 31, main girder steel the second built-in connection 32, brace is pre-buried Connector 33, pre-buried junction steel plate 34, connection steel column 35, steel corbel 36,
Steel platform 4, the main girder steel of framework intercolumniation 41, main girder steel 42 between Vierendeel girder, secondary girder steel 43, vertical rod grafting pipe 44,
Brace group 5, the first brace 51, the second brace 52,
Conjoined structure falsework system 6, vertical rod 61, jacking 62, cross bar 63, bearing diagonal steel pipe 64, bridging 65,
Conjoined structure ground floor balances 7,
The attachment structure second layer balances 8.
Detailed description of the invention
The present invention is further detailed explanation with detailed description of the invention below in conjunction with the accompanying drawings.
(embodiment 1)
The high-altitude long-span concrete conjoined structure shuttering supporting steel platform construction method of the present embodiment, is primarily adapted for use in one As head room is between 50m~150m in Industrial and Civil Engineering, the conjoined structure span between two main buildings is more than 15m's Cast-in-place concrete structure;Other similar structures can also refer to the construction method construction of the present embodiment.
See Fig. 1 to Fig. 8, the high-altitude long-span concrete conjoined structure shuttering supporting steel platform construction method of the present embodiment, Its main operational steps is as follows:
1. steel putting up platform position is determined:
According to designing the high-altitude long-span concrete conjoined structure determined at the first main building frame structure 1 and the second main building Position between frame structure 2, should determine that steel platform is between the first main building frame structure 1 and the second main building frame structure 2 mutually Set up position;Typically take below high-altitude long-span concrete conjoined structure one layer to set up.
2. safety net be set:
Below the predetermined steel platform set up, tiling safety chooses net (it is the most not shown that safety chooses net);Safety is chosen net and is existed Full paving between first main building frame structure 1 and the second main building frame structure 2, safety chooses both sides and the first main building framework knot of net Structure 1 and the second main building frame structure 2 are reliably connected;Safety is chosen net and is utilized tower crane to lift.
3. steel platform 4 is built:
The first step: install the main girder steel of framework intercolumniation 41 of steel platform 4: it is main with first that the main girder steel of framework intercolumniation 41 arranges quantity Building frame structure 1 is identical with the quantity of the frame column of the second main building frame structure 2;Each framework of the first main building frame structure 1 On each second frame column 21 of post 11 and the second main building frame structure 2, pre-plugged has the main girder steel first of predetermined coupling parts 3 pre- Bury connector 31;Main girder steel the first built-in connection 31 is to be welded with junction steel plate by pre-buried 16mm steel plate embedded part Steel corbel;The main girder steel of framework intercolumniation 41 is welded as shown in figures 1 and 3 with main girder steel the first built-in connection 31 by its two ends;Frame Main girder steel 41 arch camber 30mm in advance between trestle, to resist girder steel deflection deformation.The main girder steel of framework intercolumniation 41 uses H profile steel beam.
Second step: main girder steel 42 between the Vierendeel girder of installation steel platform 4:
Due to the Vierendeel girder 12 of the first main building frame structure 1 and the mark of the second Vierendeel girder 22 of the second main building frame structure 2 Height exists identical and differs two kinds of situations and (differ for absolute altitude in the present embodiment, as shown in Figure 2 and Figure 7), thus Vierendeel girder Between the installation fixed form of main girder steel 42 have 2 kinds:
One, if the second Vierendeel girder 22 of the Vierendeel girder of the first main building frame structure 1 12 and the second main building frame structure 2 Absolute altitude is identical, then main girder steel second built-in connection 32 of pre-buried on Vierendeel girder 12 and the second Vierendeel girder 22 predetermined coupling parts 3 It is and buries ferrum and 2M24 crab-bolt;Between each Vierendeel girder the two ends of main girder steel 42 fixing add after connecting plate respectively with Vierendeel girder 12 and the Main girder steel the second built-in connection 32 pre-buried on two Vierendeel girders 22 is anchored to add and is welded and fixed;
Its two, if the second Vierendeel girder 22 of the Vierendeel girder of the first main building frame structure 1 12 and the second main building frame structure 2 Absolute altitude differs, if Vierendeel girder 12 is higher than the second Vierendeel girder 22;The master of then pre-buried on the second Vierendeel girder 22 predetermined coupling parts 3 Girder steel the second built-in connection 32 is for burying ferrum and 2M24 crab-bolt;Between Vierendeel girder, one end of main girder steel 42 is pre-with on the second Vierendeel girder 22 Main girder steel the second built-in connection 32 buried is anchored to add and is welded and fixed;
Beam face, one layer, the lower end of the lower end of Vierendeel girder 12 and Vierendeel girder 12 is previously provided with 16mm steel plate embedded part, as Pre-buried junction steel plate 34, arranges connection steel column 35 between Vierendeel girder 12 and one layer, lower end Vierendeel girder thereof, connects the upper of steel column 35 End is provided with the steel corbel 36 grown, and between Vierendeel girder, the other end of main girder steel 42 is held on and connects the steel corbel 36 grown on steel column 35 Go up and be welded and fixed, thus complete the installation of main girder steel 42 between Vierendeel girder;Between Vierendeel girder, main girder steel 42 uses H profile steel beam, framework Main girder steel 42 arch camber 30mm in advance between beam, to resist girder steel deflection deformation.
Between each main girder steel of framework intercolumniation 41, Vierendeel girder, the upper surface of main girder steel 42 is in same level;Between each Vierendeel girder Spacing between main girder steel 42 determines according to design.
3rd step: the secondary girder steel 43 of installation steel platform 4:
Time girder steel 43 is set on main girder steel 42 between the main girder steel of framework intercolumniation 41 installed and Vierendeel girder;Secondary girder steel 43 And main girder steel 42 intersects vertically and is welded to connect between the main girder steel of framework intercolumniation 41 and Vierendeel girder;The setting space of each girder steel 43 is combined Close and consider that conjoined structure falsework system 6 determines according to design;Vertical rod grafting pipe 44, vertical rod it is welded with in advance on secondary girder steel 43 Grafting pipe 44 is the steel pipe of internal diameter 25mm;The quantity of vertical rod grafting pipe 44 and conjoined structure falsework system 6 institute The quantity of the vertical rod 61 needed is identical.Secondary girder steel 43 the present embodiment uses 16# I-steel.
4. brace group 5 be set:
The first step: be positioned at the ground floor above steel platform 4 in the first main building frame structure 1 and the second main building frame structure 2 The most each pre-buried 2 assembly weldings have and connect the 16mm thickness of otic placode to bury ferrum pre-buried as brace with the side of the Vierendeel girder of second layer both sides Connector 33;Brace built-in connection 33 amounts to eight groups;
Second step: determine that 2 main girder steels of framework intercolumniation 41 accept girder steel as pull-up, at 2 selected frameworks according to design The most each selected 4 pull-up nodes on the main girder steel of intercolumniation 41, welding inclination angle on each pull-up node is 45~600The connection at angle Plate;
3rd step: install brace group 5: brace group 5 includes 4 first braces 51 and 4 second braces 52;The One brace 51 and the second brace 52 are the round steel of diameter 30mm;The lower end of these 4 first braces 51 respectively with 2 frames The connecting plate correspondence welding that between trestle, each 2 the pull-up nodes (being positioned at inner side) on main girder steel 41 are arranged;These 4 first braces The upper end of 51 is positioned at the second layer both sides above steel platform 4 with the first main building frame structure 1 and the second main building frame structure 2 respectively The pre-buried connection otic placode high-strength bolt amounting to 4 groups of brace built-in connections 33 in the side of Vierendeel girder hinged;These 4 The lower end of the second brace 52 sets with the most each 2 the pull-up nodes (being positioned at outside) on 2 main girder steels of framework intercolumniation 41 respectively The connecting plate correspondence welding put;The upper end of these 4 second braces 52 respectively with the first main building frame structure 1 and the second main building frame What the side of the Vierendeel girder that shelf structure 2 is positioned at the ground floor both sides above steel platform 4 was pre-buried amounts to 4 groups of brace built-in connections The connection otic placode high-strength bolt of 33 is hinged.
4 first braces 51 of brace group 5 constitute 2 inverse Ba types;4 second braces 52 constitute other 2 Inverse Ba type;Brace group 5 is used for steel platform 4 and the unloading of load thereof and stablizes.
5. laying flitch and plank on steel platform:
Secondary girder steel 43 completely spread flitch and fastens, and carrying out totally-enclosed with plank thick for 20mm or three-ply board stickfast.
6. double-pole scaffold is set up on steel platform:
Setting up double-pole scaffold in the outside of steel platform 4, double-pole scaffold rides upon on steel platform 4;And it is high to arrange 600mm Template be used as skirting board;Dense mesh screen is completely pricked in the outside of double-pole scaffold;Execute at whole high-altitude long-span concrete conjoined structure Between the duration, as operating outer protective frame, to guarantee work layer workman's construction safety (double-pole scaffold is the most not shown).
7. conjoined structure falsework system 6 is set up:
Conjoined structure falsework system 6 includes vertical rod 61, jacking 62, cross bar 63, bearing diagonal steel pipe 64, bridging 65 and Conjoined structure ground floor support shuttering.
The first step: piece vertical rod of each grafting respectively in each vertical rod grafting pipe 44 on the secondary girder steel 43 of steel platform 4 61;The upper end of vertical rod 61 arranges jacking 62;
Second step: between vertical rod 61 arrange before and after to and left and right to cross bar 63, each cross bar 63 and corresponding vertical rod 61 Fastener is connected firmly;
3rd step: arrange 3 road bearing diagonal steel pipes 64 between vertical rod 61 and Vierendeel girder 12, at vertical rod 61 and the second Vierendeel girder 3 road bearing diagonal steel pipes 64 are set between 22;Bearing diagonal steel pipe 64 is for unloading vertical rod 61;Flat to steel to reduce vertical rod 61 The load of platform 4, increases the stability of whole load bearing support system;
4th step: the surrounding in vertical rod 61 and the framework of cross bar 63 composition arranges bridging 65;
5th step: the upper end of vertical rod 61 arrange jacking 62 be provided above conjoined structure ground floor support shuttering;
6th step: supplementary protection facility is set: for guarantee to bear the Vierendeel girder of steel platform 4 can enough bear steel platform 4 and All load on steel platform 4, add at Vierendeel girder and main girder steel power transmission position and hang muscle and stirrup, and hanging muscle is 2 diameter 20mm Reinforcing bar;Stirrup diameter is identical with the former stirrup of Vierendeel girder, and every side arranges 3, setting space 50mm;And retain under steel platform Side's ground floor, the beam bottom mother plate that balances of the lower section second layer support and do not remove.
8. conjoined structure ground floor construction: construct on conjoined structure ground floor support shuttering, complete conjoined structure first Layer balances 7.
9. conjoined structure second layer construction: balance at the conjoined structure ground floor completed and build once again by vertical rod above 7 61, jacking 62, cross bar 63, bearing diagonal steel pipe 64, bridging 65 and conjoined structure second layer support shuttering, then at conjoined structure Construct on second layer support shuttering, complete the conjoined structure second layer and balance 8;Thus complete whole high-altitude long-span concrete and connect The construction of structure.
Above example is the explanation of the detailed description of the invention to the present invention, rather than limitation of the present invention, relevant technology The technical staff in field is without departing from the spirit and scope of the present invention, it is also possible to makes various conversion and change and obtains To the technical scheme of corresponding equivalent, the technical scheme of the most all equivalents all should be included into the patent protection model of the present invention Enclose.

Claims (6)

1. a high-altitude long-span concrete conjoined structure shuttering supporting steel platform construction method, it is characterised in that: include following Step:
1. steel putting up platform position is determined: according to designing the high-altitude long-span concrete conjoined structure determined at the first main building framework Position between structure (1) and the second main building frame structure (2), takes the first main building frame structure (1) and the second main building framework knot One layer it is positioned at below high-altitude long-span concrete conjoined structure as steel putting up platform position between structure (2);
2. safety net is set: below the predetermined steel platform set up, tiling safety chooses net;
3. steel platform (4) is built:
The first step: install the main girder steel of the framework intercolumniation (41) of steel platform (4): the main girder steel of framework intercolumniation (41) arranges quantity and first Main building frame structure (1) is identical with the quantity of the frame column of the second main building frame structure (2);First main building frame structure (1) The upper pre-plugged of each second frame column (21) of each frame column (11) and the second main building frame structure (2) has predetermined coupling parts (3) Main girder steel the first built-in connection (31);The main girder steel of framework intercolumniation (41) is by its two ends and main girder steel the first built-in connection (31) welding;
Second step: main girder steel (42) between the Vierendeel girder of installation steel platform (4):
If second Vierendeel girder (22) of the Vierendeel girder (12) of the first main building frame structure (1) and the second main building frame structure (2) Absolute altitude is identical, pre-buried at the main girder steel second of the upper pre-buried one group of predetermined coupling parts (3) of Vierendeel girder (12) and the second Vierendeel girder (22) Connector (32);Between each Vierendeel girder the two ends of main girder steel (42) fixing add after connecting plate respectively with Vierendeel girder (12) and the second frame Setting a roof beam in place, (22) upper pre-buried main girder steel the second built-in connection (32) is fixing to be connected;
If second Vierendeel girder (22) of the Vierendeel girder (12) of the first main building frame structure (1) and the second main building frame structure (2) Absolute altitude is different, is embedded with the main girder steel the second built-in connection (32) of one group of predetermined coupling parts (3) on the second Vierendeel girder (22); One end of main girder steel (42) pre-buried each main girder steel second built-in connection (32) upper with the second Vierendeel girder (22) between each Vierendeel girder Corresponding fixing connection;The lower end of Vierendeel girder (12) and the upper end, one layer of beam face, lower end of Vierendeel girder (12) are respectively provided with one group the most respectively Weld with pre-buried junction steel plate (34) one group of pre-buried junction steel plate (34) and up and down two ends is connected steel column (35), connection steel column (35) top is fixed with the steel corbel (36) grown;Between each Vierendeel girder, the other end of main girder steel (42) is held on steel corbel (36) go up and weld;
Between each Vierendeel girder, the upper surface of main girder steel (42) and the upper surface of the main girder steel of each framework intercolumniation (41) are in same level On;Between each Vierendeel girder, the spacing between main girder steel (42) determines according to design;
3rd step: install the secondary girder steel (43) of steel platform (4): between the main girder steel of the framework intercolumniation (41) installed and Vierendeel girder Main girder steel (42) arranges time girder steel (43) by design pitch;Master between secondary girder steel (43) and the main girder steel of framework intercolumniation (41) and Vierendeel girder Girder steel (42) intersects vertically and is welded to connect;Vertical rod grafting pipe (44), vertical rod grafting it is welded with in advance on each girder steel (43) Quantity and the position of pipe (44) determine according to design;
Brace group (5) is 4. set:
The first step: be positioned at the first of steel platform (4) top in the first main building frame structure (1) and the second main building frame structure (2) The most each pre-buried 2 groups of the side of the Vierendeel girder of layer and second layer both sides amounts to 8 groups of brace built-in connections (33);
Second step: determine that the 2 main girder steel of framework intercolumniations (41) accept girder steel as pull-up, at 2 selected frame columns according to design Between main girder steel (41) the most each upper selected 4 pull-up nodes, welding inclination angle on each pull-up node is 450~600Connection Plate;
3rd step: install brace group (5): brace group (5) includes 4 first braces (51) and 4 second braces (52);The lower end of these 4 first braces (51) sets with each 2 the pull-up nodes on the 2 main girder steel of framework intercolumniations (41) respectively The connecting plate correspondence welding put;The upper end of these 4 first braces (51) is main with the first main building frame structure (1) and second respectively 4 groups of braces altogether that the side of the Vierendeel girder that building frame structure (2) is positioned at the second layer both sides of steel platform (4) top is pre-buried are pre- Bury connector (33) hinged;The lower end of these 4 second braces (52) respectively with the 2 main girder steel of framework intercolumniations (41) on additionally The connecting plate correspondence welding of each 2 pull-up nodes;The upper end of these 4 second braces (52) respectively with the first main building frame structure (1) pre-buried the amounting in side of the Vierendeel girder that and the second main building frame structure (2) is positioned at the ground floor both sides of steel platform (4) top 4 groups of brace built-in connections (33) are hinged;
5. laying flitch and plank on steel platform: completely spread flitch on secondary girder steel (43) and fasten, on flitch, full boarding is also Stickfast;
6. double-pole scaffold is set up on steel platform: above and set up double-pole scaffold in the outside of steel platform (4) at steel platform (4); And skirting board is set;Dense mesh screen is completely pricked in the outside of double-pole scaffold;
7. conjoined structure falsework system (6) is set up: conjoined structure falsework system (6) includes vertical rod (61), jacking (62), cross bar (63), bearing diagonal steel pipe (64), bridging (65) and conjoined structure ground floor support shuttering;
The first step: difference piece vertical rod (61) of each grafting in each vertical rod grafting pipe (44) on secondary girder steel (43);Vertical rod (61) upper end arranges jacking (62);
Second step: between vertical rod (61) arrange before and after to and left and right to cross bar (63), each cross bar (63) and corresponding vertical rod (61) fastener is connected firmly;
3rd step: 3 roads bearing diagonal steel pipe (64) to vertical rod (61) unloading are set between vertical rod (61) and Vierendeel girder (12); 3 roads bearing diagonal steel pipe (64) to vertical rod (61) unloading are set between vertical rod (61) and the second Vierendeel girder (22);
4th step: the surrounding of the framework constituted in vertical rod (61) and cross bar (63) arranges bridging (65);
5th step: be provided above conjoined structure ground floor support shuttering at jacking (62);
8. conjoined structure ground floor construction: construct on conjoined structure ground floor support shuttering, completes conjoined structure ground floor knot Flat (7);
9. conjoined structure second layer construction: build once again by vertical rod in the balance top of (7) of the conjoined structure ground floor completed (61), jacking (62), cross bar (63), bearing diagonal steel pipe (64), bridging (65) and conjoined structure second layer support shuttering, then Conjoined structure second layer support shuttering is constructed, completes the conjoined structure second layer and balance (8).
High-altitude long-span concrete conjoined structure shuttering supporting steel platform construction method the most according to claim 1, it is special Levy and be: the main girder steel the second built-in connection (32) of described predetermined coupling parts (3) is for burying ferrum and 2M24 crab-bolt.
High-altitude long-span concrete conjoined structure shuttering supporting steel platform construction method the most according to claim 1, it is special Levy and be: described main girder steel the first built-in connection (31) for being welded with junction steel plate by pre-buried 16mm steel plate embedded part and The steel corbel become;Between the described main girder steel of framework intercolumniation (41) and Vierendeel girder, main girder steel (42) is H profile steel beam and arch camber in advance 30mm is to resist girder steel deflection deformation;Secondary girder steel (43) is 16# I-steel.
High-altitude long-span concrete conjoined structure shuttering supporting steel platform construction method the most according to claim 1, it is special Levy and be: the pre-buried junction steel plate arranged on the lower end of described Vierendeel girder (12) and the beam face, one layer, lower end of Vierendeel girder (12) (34) it is 16mm steel plate embedded part;Brace built-in connection (33) is that the 16mm thickness being welded with and connecting otic placode buries ferrum.
High-altitude long-span concrete conjoined structure shuttering supporting steel platform construction method the most according to claim 1, it is special Levy and be: the described steel pipe that vertical rod grafting pipe (44) is internal diameter 25mm;First brace (51) of brace group (5) With the round steel that 4 second braces (52) are diameter 30mm.
High-altitude long-span concrete conjoined structure shuttering supporting steel platform construction method the most according to claim 1, it is special Levy and be: described step the most also includes:
6th step: supplementary protection facility is set: adds at the main girder steel power transmission position of Vierendeel girder with steel platform and hangs muscle and stirrup;Hang Muscle is the reinforcing bar of 2 diameter 20mm;Stirrup diameter is identical with the former stirrup of Vierendeel girder, and every side arranges 3, setting space 50mm; And retain steel platform underlying first layer, the beam bottom mother plate that balances of the lower section second layer supports and does not removes, and bears steel platform to increase The load-carrying ability of Vierendeel girder.
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