Cable-stayed bridge upper king-post strut steel anchor beam anchoring section little space construction method
The present invention relates to bridge high-altitude construction field, particularly a kind of cable-stayed bridge upper king-post strut steel anchor beam anchoring little space of section
With the expanding day of China's traffic network, large-scale cable-stayed bridge emerges in an endless stream.For cable-stayed bridge, suspension cable
Tower end anchorage technology is also at Change and Development, such as steel anchor box anchoring system, steel anchor beam anchoring system etc., no matter but using steel anchor box anchor
Solid system still uses the tower end anchorage style of steel anchor beam anchoring system, and in the steel anchor beam anchoring section construction of upper king-post strut, case is always
There is the difficulty that operating space is narrow and small, cannot use hydraulic climbing mould construction, and use conventional steel pipe scaffold template system to execute
Work is time-consuming again, and dangerous.
The conventional method of upper king-post strut steel anchor beam anchoring section little space construction mainly has two kinds.
First method is that construction after steel pipe scaffold is set up in classification.I.e. utilize in advance at upper king-post strut previous sections concrete
The pre-buried built-in fitting in side, welding shaped steel distribution beam (other end is shelved on steel anchor beam top board as fulcrum stress), erection construction
Platform simultaneously lays scaffold board, then set up steel pipe scaffold on it, after acceptance(check), then carries out reinforcement installation pre-buried rear
The steel pipe scaffold operation platform built-in fitting of sections, then carry out model sheetinstallat and concrete pouring construction.Treat that concrete strength reaches
After strength of mould stripping, form removal, operation platform and the steel pipe scaffold of later section section are installed, complete previous sections steel pipe simultaneously
Scaffold and the dismounting of platform, then carry out the constructions such as the reinforcing bar of next sections, template and concrete, so circulate, complete tower
Post is constructed.
The method has the disadvantages that
1) every sections reinforcement installation could need to be constructed after the operation platform of every sections and steel pipe scaffold installation, work
Sequence is long for off time, and the duration relatively lags behind.
2) before every segmental construction, steel anchor beam structure must be installed in advance, space critical constraints when making upper king-post strut construct, because of
The installation of the operation platform of this every sections and steel pipe scaffold and dismounting difficulty.
3) every operation platform of sections and the installation of steel pipe scaffold and dismounting need to consume more manpower and time, and
Lifting often, safety prevention measure need to synchronize to dismount back and forth, there is bigger potential safety hazard.
4) operation platform of every sections and steel pipe scaffold construction need to check each built-in fitting and platform shaped steel distribution beam it
Between weld seam, the bridging of steel pipe scaffold, multiple project such as safety prevention measure, inspection personnel's workload is bigger.
5) need on each sections of upper king-post strut burial and construction platform built-in fitting, both wasted material, affected again Sarasota upper king-post strut
Interior room concrete appearance, and process is also required to exert in the future.
Second method is elongated to set up construction after steel pipe scaffold.I.e. set up on Sarasota entablature top cover concrete surface
Foot tube leg hand cradle (attached wall classification is attached on each layer steel anchor beam), then carries out the reinforcement installation of the previous sections of upper king-post strut, then carries out
Model sheetinstallat and concrete pouring construction, connect high steel pipe scaffold during equal strength, carries out upper king-post strut previous sections concrete
The dabbing of end face, carries out the reinforcement installation of upper king-post strut later section section, removes the template of previous sections and clears up finishing, after installation one
Sections template, again pours later section section concrete, so circulates, and completes upper king-post strut construction.
The shortcoming of this method is:
1) before every segmental construction, steel anchor beam structure must be installed in advance, space critical constraints when making upper king-post strut construct, because of
The installation difficulty of this every sections steel pipe scaffold and last dismounting operational difficulties.
2) elongated steel pipe scaffold repeatedly install (increase every time a setting height(from bottom)) need to consume more manpower and when
Between, and lifting often, safety prevention measure need to synchronize to install back and forth, there is bigger potential safety hazard.
3) the elongated steel pipe scaffold set up need to check multiple project such as bridging, safety prevention measure, scrutineer employee
4) the elongated steel pipe scaffold set up must be provided with multilayer attached wall part, needs when leaning on the attached wall part of steel anchor beam side to arrange
Solder joint is set at steel anchor beam, leans on the attached wall part of king-post concrete side when arranging, to need pre-buried in advance built-in fitting, and weld with shaped steel,
Both wasted material, and affected again room concrete appearance in Sarasota upper king-post strut, and process is also required to exert in the future.
Content of the invention
In order to overcome above-mentioned technical problem, it is an object of the invention to provide a kind of cable-stayed bridge upper king-post strut conveniently, safely
Steel anchor beam anchoring section little space construction method.
The technical solution adopted in the present invention is:
A kind of cable-stayed bridge upper king-post strut steel anchor beam anchoring section little space construction method, comprises the following steps:
A. the pin hand integrated device can opened and close up is contained in steel Nei Monei in advance；
B. mould in steel is lifted on the sections to be cast of room in upper king-post strut, makes the pin hand integrated device closing up be bearing in steel anchor
Liang Shang, installation foot palm on pin hand integrated device；
C. opening pin hand integrated device makes it separate with steel anchor beam；
D. mould in hoisting steel；
E. step b to d is repeated.
As the improvement further of technique scheme, in described steel, mould includes two pieces being parallel to each other and being separated from each other,
Described pin hand integrated device includes two relative expansion bearings, described two expansion bearings back to end be articulated in two blocks of steel respectively
On interior mould, the removable connection in opposite end.
As the improvement further of technique scheme, in described step b, rotate two expansion bearings make both close up and in
Crossbeam shape, utilizes bolt and connecting plate that two expansion bearings are connected into entirety.
As the improvement further of technique scheme, in described step c, two expansion bearings are split and each around pivot
Axle rotates, and makes expansion bearing separate with steel anchor beam.
As the improvement further of technique scheme, in described step d, lift by crane mould in each steel successively.
As the improvement further of technique scheme, tower crane is fastened and is hooked in the steel of monolithic on mould, and rotary moveable supporting makes
It separates with steel anchor beam, and after in tower crane lifting steel, mould puts in place, rotary moveable supports and make it to be bearing in the corresponding steel anchor beam in top
End face, in steel, mould and the outside hydraulic climbing formwork template putting in place of having creeped is connected by pull bar, and in steel, mould top uses simultaneously and leads
Chain bolt hangs on stiff skeleton.
The invention has the beneficial effects as follows: the present invention is contained in steel on mould by the pin hand integrated device that open-close type designs in advance,
When promoting, pin hand integrated device is opened, positions and need to be closed up during installation foot palm and be bearing on steel anchor beam, it is to avoid
Carry out, in interior room, the work that a large amount of built-in fitting is buried underground during the anchoring section construction of Sarasota upper king-post strut steel anchor beam, eliminate tower on Sarasota
After post construction, problem is repaired in interior room, also there is not upper king-post strut steel anchor beam anchoring section little space internal classification erection construction platform and steel
Pin hand cradle, the elongated difficulty setting up steel pipe scaffold, and do not have steel pipe scaffold engineering to remove danger, it is to avoid a large amount of manpower
With the consumption of time, its have conveniently, safely, feature efficiently.
The present invention is further described with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is the floor map of mould and pin hand integrated device in steel of the present invention；
Fig. 2 is the elevational schematic view of mould and pin hand integrated device in steel of the present invention；
Fig. 3 is the schematic diagram after expansion bearing separates；
Fig. 4 is mould lifting schematic diagram in steel.
Detailed description of the invention
First it is by the design of mould and pin hand integrated device in steel, as depicted in figs. 1 and 2.
(1) overall size according to case in Sarasota, makes mould 1 in steel in a conventional manner, arranges by additional space simultaneously
Steel framed bent 5, steel framed bent 5 is welded in steel on mould 1 back cord and the short transverse of mould 1 is arranged, at vertical direction shaped steel along steel
It is unified into an entirety again, facilitates personnel to stand construction, it is ensured that the appropriate gap of steel framed bent 5 limit and steel anchor beam 6, in order to mould in steel
The dismounting of 1 and lifting.
(2) according to upper king-post strut anchor segment steel anchor beam 6 arrange layer away from Sarasota pour merogenesis, design expansion bearing
2 in steel the relevant position on mould 1, including the arrangement pitch of the quantity of expansion bearing 2 and expansion bearing 2 bearing, to ensure
Expansion bearing 2 is had to play supporting-point effect during each segmental construction in upper king-post strut anchoring section.
(3) in expansion bearing 2 and steel the steel framed bent 5 of mould 1 overall between use and be pivotally connected, mould 1 main body bone in steel simultaneously
The vertical tube of frame is provided with pivot joint ear 4, and expansion bearing 2 is articulated on pivot joint ear 4.Pivot joint ear 4 is arranged on vertical tube and can effectively prevent
Articulated section deformation and tear.In two blocks of steel, mould 1 is provided with some pivot joint ears 4 along short transverse, and pivot joint ear 4 phase of mould 1 in each steel
Symmetrical mutually.In same steel, on mould 1, the setting of multiple pivot joint ears 4 ensure that expansion bearing 2 has more installation position, convenient alive
The adjustment of dynamic supporting 2.
(4) in steel, the expansion bearing 2 on mould 1 uses opening and closing formula to design, and i.e. in upper king-post strut, the expansion bearing 2 of both sides, room exists
After installation puts in place, an entirety need to be connected into by bolt and connecting plate 3, improve globality and the stability of structure.Work as needs
During dismounting, bolt and connecting plate 3 are dismantled, and rotary moveable supporting 2.
The construction method of the present embodiment is as follows:
1st, in steel, mould 1 and pin hand integrated device are assembled into entirety at the scene, mainly first mould in steel 1 are assembled into entirety,
Then expansion bearing 2 is pivotably attached on the steel framed bent 5 of mould 1 in steel.
2nd, in using the steel of tower crane integral hoisting side, mould 1 enters room in upper king-post strut, takes rotary moveable supporting 2 to make simultaneously
It is bearing on steel anchor beam 6, in steel, mould 1 is connected with outside hydraulic climbing formwork template 7 pull bar 8, is bundled in mould in steel 1 bolt by guide chain
Three kinds of safety measures are waited on stiff skeleton.After mould 1 lifting puts in place in opposite side steel, rotate both sides expansion bearing 2 immediately and go forward side by side
Row bolt connects, and forms an overall structure, then spreads scaffold board on expansion bearing 2, form construction operation platform.
3rd, adjusting template, in fastening steel, the rod nut between mould 1 and outside hydraulic climbing formwork template 7, carries out concrete and waters
Build construction, wait strong maintenance, king-post sections top of concrete dabbing；Then the installation of steel anchor beam, the stiffness of next sections king-post are carried out
The operations such as skeleton installation, reinforcement installation.
4th, the rod nut between mould 1 and outside hydraulic climbing formwork template 7 in releasing steel, outside hydraulic climbing formwork self climbing is just
Position, outside adjustment, hydraulic climbing formwork template 7 is in place at next sections, and workmen stands on steel anchor beam 6 end face of room in king-post, will
Scaffold board on each layer job platform is transferred to above neighbouring steel anchor beam 6 or steel framed bent 5, by mould in the steel of both sides 1 top respectively
Be tied by guide chain, then 2 connecting bolts of expansion bearing released, rotate unilateral expansion bearing 2, make expansion bearing 2 be screwed into
Steel anchor beam 6 separates, it is to avoid when in steel, mould 1 promotes, expansion bearing 2 and steel anchor beam 6 are conflicted, as shown in Figure 3.
5th, tower crane is tied mould 1 top in the steel of one side, and Survey Operations supports 2 states, it is ensured that will not be with when in steel, mould 1 promotes
Cable support tower steel anchor beam 6 grade is conflicted, check errorless after, mould 1 to later section fragment position in tower crane integrally hoisting steel, unilateral activity of outwarding winding
Holding 2 to be allowed to be bearing on steel anchor beam 6, the rod nut between mould 1 and outside hydraulic climbing formwork template 7 in the unilateral steel of installation, in steel
Mould 1 top guide chain is fastened on king-post stiff skeleton, and mould 1 in the steel of same method lifting opposite side, connection activity after adjustment is propped up
Hold 2 connecting bolts, be layered installation foot hand platform, the rod nut between mould 1 and outside hydraulic climbing formwork template 7 in fastening steel,
Pour later section section concrete, enter circulation construction, as shown in Figure 4.
6th, before Sarasota binds, mould in steel 1 is removed out together with expansion bearing 2 tower crane lifting.
Above example is only in order to illustrate technical scheme and unrestricted, although with reference to preferred embodiment to this
It bright has been described in detail, it will be understood by those within the art that, technical scheme can be modified
Or equivalent, without deviating from objective and the scope of technical solution of the present invention, it all should cover the claim in the present invention
In the middle of scope.