阅读说明：本技术 一种大跨度门式上横梁分体支架的施工方法 (A kind of construction method of large span gate-type upper beam Split type supporting stand ) 是由 蔡仁杰 王昌裕 李二伟 赵少强 袁传军 姜勇 于 2019-08-05 设计创作，主要内容包括：本发明的一种大跨度门式上横梁分体支架的施工方法,通过构建塔柱,在塔柱的中上部分别间隔装设多个预埋件；通过塔吊起吊弦杆、上连接架和下连接架至钢箱梁上部的塔柱之间拼装形成π型桁架,通过预埋件将π型桁架与塔柱固定；在钢箱梁顶面组装形成箱型桁架,吊动箱型桁架与预埋件固定相连,并在π型桁架的顶部浇筑形成水平横梁；顺序拆除弦杆、上连接架和下连接架,在上连接架处结合下连接架浇筑形成上部阶梯状装饰块,并在塔柱内侧且对应用于安装下连接架处结合箱型桁架浇筑形成下部阶梯状装饰块。本发明采用工厂化加工,现场组拼连接,加工质量好,现场施工效率高,支架结构轻巧,减少投入,门式上横梁与下部钢箱梁可同时施工。(A kind of construction method of large span gate-type upper beam Split type supporting stand of the invention is respectively separated the multiple built-in fittings of installing in the middle and upper part of king-post by constructing king-post；Chord member, upper connection frame and lower connection frame are lifted by crane by tower crane and forms π type truss to assembled between the king-post on steel box-girder top, are fixed π type truss with king-post by built-in fitting；It assembles to form box truss in steel box-girder top surface, hangs box truss and be fixedly linked with built-in fitting, and pour to form horizontal gird at the top of π type truss；Orderly release chord member, upper connection frame and lower connection frame, connection frame pours to form the ladder-like ornamental blocks in top under combining at upper connection frame, and pours to form lower step shape ornamental blocks in conjunction with box truss on the inside of king-post and to applied at connection frame under installation.The present invention is processed using batch production, and live spelling connection, processing quality is good, and site operation is high-efficient, and supporting structure is light and handy, reduces investment, and gate-type upper beam can construct simultaneously with lower part steel box-girder.)

1. a kind of construction method of large span gate-type upper beam Split type supporting stand, which is characterized in that include the following steps,

Step S1 constructs king-post, and steel box-girder is installed in bottom between king-post, and it is more in the middle and upper part of king-post to be respectively separated installing A built-in fitting；

Step S2 sets up tower crane in the king-post two sides respectively, lifts by crane chord member, upper connection frame and lower connection frame by the tower crane To between the king-post on the steel box-girder top, π type purlin is formed to the chord member, upper connection frame and the lower connection frame assembly Frame is transferred at the π type truss to the built-in fitting, is fixed the π type truss with the king-post by the built-in fitting；

Step S3 assembles to form box truss in the steel box-girder top surface, hangs the box truss and fixes with the built-in fitting It is connected, and pours to form horizontal gird at the top of the π type truss；

Step S4, the setting hanging lowering system on the horizontal gird, chord member, upper connection frame described in orderly release and it is described under Connection frame pours to form top on the inside of the king-post and to being applied to install at the upper connection frame in conjunction with the lower connection frame Ladder-like ornamental blocks, and poured on the inside of the king-post and to being applied to install at the lower connection frame in conjunction with the box truss Form lower step shape ornamental blocks；

Step S5 hangs the box truss to the steel box-girder by hanging lowering system and removes.

2. a kind of construction method of large span gate-type upper beam Split type supporting stand as described in claim 1, which is characterized in that described In step S1, the middle and upper part of the king-post is installed at least three intervals setting built-in fitting；The king-post at the built-in fitting Cavity in be installed with reinforcing rod.

3. a kind of construction method of large span gate-type upper beam Split type supporting stand as claimed in claim 2, which is characterized in that described In step S2, the lower connection frame triangular shape, the upper connection frame parallelogram shape, the upper connection frame with it is described Lower connection frame splicing, and the top of two upper connection frames and the chord member are connected to form the π type truss.

4. a kind of construction method of large span gate-type upper beam Split type supporting stand as claimed in claim 3, which is characterized in that described Step S4 includes connection frame in dismounting in detail, corresponding for installing the upper connection frame to be supported on the lower connection frame Installation crossbeam, stringer, disk buckle type scaffold and template system, pour complete the ladder-like decoration in top in three times on the inside of king-post Block.

5. a kind of construction method of large span gate-type upper beam Split type supporting stand as claimed in claim 3, which is characterized in that described Step S4 includes removing lower connection frame in detail, corresponding for installing the lower connection frame to be supported on the box truss Installation crossbeam, disk buckle type scaffold and template system, pour complete lower step shape ornamental blocks in three times on the inside of king-post.

6. a kind of construction method of large span gate-type upper beam Split type supporting stand as claimed in claim 3, which is characterized in that described Lower connection frame includes four first battered legs, strut and pull rod, and four first battered leg intervals are arranged, and make the battered leg One end is obliquely connected with the built-in fitting on the king-post, and described pull rod one end is connected with the other end of the battered leg, and makes The other end of the pull rod is connected with the built-in fitting on the king-post, and described strut one end is connected with the pull rod, and the branch The other end of bar is connected to the described first oblique midleg, and adjacent first battered leg is connected by outstanding pull rod.

7. a kind of construction method of large span gate-type upper beam Split type supporting stand as claimed in claim 3, which is characterized in that described Using bolt between upper connection frame and the lower connection frame.

8. a kind of construction method of large span gate-type upper beam Split type supporting stand as described in claim 1, which is characterized in that described Box truss is laid lower than the π type truss position.

Technical field

The present invention relates to technical field of bridge construction, more particularly, to a kind of large span gate-type upper beam Split type supporting stand Construction method.

Background technique

Self-anchored suspension bridge or cable-stayed bridge are more and more applied to city's political and ideological work because of the advantages that bridge type is beautiful, span ability is strong In journey field, especially in cross a river, obvious across railway or existing highway overpass regional advantages, often become terrestrial reference landscape Building, and the upper beam structure as Sarasota important component also need to take into account appearance and modeling need in addition to meeting stress and needing Ask, especially double limb Sarasotas lower part be using within the scope of the steel box-girder of incremental launching method, Sarasota overall height only gate-type upper beam this When one of transverse connection structure, common console mode steel-pipe pile Support Method and all exist without console mode overall steel structure Bracket method many Defect.

The shortcomings that console mode steel-pipe pile Support Method and deficiency: the first, gate-type upper beam and lower part steel box-girder synchronous construction, door Formula upper beam drop shadow spread is lower part steel box-girder, is rushed due to the needs of steel box-girder pushing tow with console mode steel-pipe pile backing positions It dashes forward and can not avoid；The second, gate-type upper beam and the asynchronous construction of lower part steel box-girder, then conventional construction sequence is lower part steel box-girder top It shifts gate-type upper beam of constructing again behind position onto, necessarily leads to the extension of total construction period, and because upper beam height is higher, there are steel-pipe piles The problem that bracket installation period is longer, quantity of material investment is more, welding workload is big.

The shortcomings that no console mode overall steel structure Bracket method and deficiency: the first, the horizontal gird of gate-type upper beam division, top Ladder-like ornamental blocks and lower part ornamental blocks are all made of overall steel structure bracket and construct, then need to fall down from top to bottom and use overall steel Structure bracket, there are multiple bearing, cutting and welding, cause difficulty big, long in time limit；The second, horizontal gird uses overall steel structure support Frame, the ladder-like ornamental blocks in top and lower part ornamental blocks are respectively adopted Small bracket and construct, and there is also long in time limit, asking more than investment Topic.

Summary of the invention

In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is that providing a kind of large span door The construction method of formula upper beam Split type supporting stand.

According to an aspect of the present invention, a kind of construction method of large span gate-type upper beam Split type supporting stand is provided, including Following steps,

Step S1 constructs king-post, and steel box-girder is installed in the bottom between king-post, and is respectively separated dress in the middle and upper part of king-post If multiple built-in fittings；

Step S2 sets up tower crane in the king-post two sides respectively, lifts by crane chord member, upper connection frame and lower company by the tower crane Frame is connect between the king-post on the steel box-girder top, the chord member, upper connection frame and the lower connection frame assembly are formed The π type truss is transferred at the π type truss to the built-in fitting, by the built-in fitting by the π type truss and the tower Column is fixed；

Step S3 assembles to form box truss, hangs the box truss and the built-in fitting in the steel box-girder top surface It is fixedly linked, and pours to form horizontal gird at the top of the π type truss；

Step S4, lowering system, chord member, upper connection frame and institute described in orderly release are hung in setting on the horizontal gird Lower connection frame is stated, to be formed on the inside of the king-post and to being applied to install to pour at the upper connection frame in conjunction with the lower connection frame The ladder-like ornamental blocks in top, and on the inside of the king-post and to being applied to install at the lower connection frame in conjunction with the box truss It pours to form lower step shape ornamental blocks；

Step S5 hangs the box truss to the steel box-girder by hanging lowering system and removes.

On the basis of above scheme preferably, in the step S1, the middle and upper part of the king-post is installed at least three intervals Built-in fitting is set；Reinforcing rod is installed in the cavity of the king-post at the built-in fitting.

On the basis of above scheme preferably, in the step S2, the lower connection frame triangular shape, the upper connection frame Parallelogram shape, the upper connection frame and the lower connection frame splice, and by the top of two upper connection frames and institute It states chord member and is connected to form the π type truss.

On the basis of above scheme preferably, the step S4 includes connection frame in dismounting in detail, is with the lower connection frame It is supported on for installing installation crossbeam, stringer, disk buckle type scaffold and template system on the inside of the corresponding king-post of the lower connection frame System pours complete the ladder-like ornamental blocks in top in three times.

On the basis of above scheme preferably, the step S4 includes removing lower connection frame in detail, is with the box truss It is supported on for installing installation crossbeam, disk buckle type scaffold and template system on the inside of the corresponding king-post of the lower connection frame, divides three Secondary pour completes lower step shape ornamental blocks.

On the basis of above scheme preferably, the lower connection frame includes four first battered legs, strut and pull rod, described in four The setting of first battered leg interval, and one end of the battered leg is obliquely connected with the built-in fitting on the king-post, the drawing Bar one end is connected with the other end of the battered leg, and the other end of the pull rod is made to be connected with the built-in fitting on the king-post, institute It states strut one end to be connected with the pull rod, and the other end of the strut is connected to the described first oblique midleg, it is adjacent described First battered leg is connected by outstanding pull rod.

On the basis of above scheme preferably, using bolt between the upper connection frame and the lower connection frame.

On the basis of above scheme preferably, the box truss is laid lower than the π type truss position.

The invention has the following advantages over the prior art:

1, batch production is processed, and live spelling connection, processing quality is good, and site operation is high-efficient.

2, supporting structure is light and handy, reduces investment.

3, gate-type upper beam and lower part steel box-girder can construct simultaneously.

4, Split type supporting stand falls to use without recycling after removing, and realizes that gate-type upper beam is different by removing paragraph by paragraph from top to bottom The construction period is shortened in the construction of block, reduces the high altitude operation frequency.

5, π type truss and box truss have allomeric function.The two, which is combined, can realize horizontal cross when being used in conjunction with The construction of beam, π type truss play load-carrying members effect, and box truss plays girt effect.

6, π type truss has standalone feature.After removing π type chord member of truss and upper connection frame, remaining lower connection frame The construction of the ladder-like decoration block concrete in top can be achieved.

7, box truss has standalone feature.When π type truss removes chord member and lower connection frame, has and remove platform and high-altitude Protective platform effect；Lower ornamental blocks come into operation when constructing as bracket.

Detailed description of the invention

Fig. 1 is the construction elevational schematic view of step 1 of the present invention；

Fig. 2 is the construction elevational schematic view of step 2 of the present invention；

Fig. 3 is the construction elevational schematic view of step 3 of the present invention；

Fig. 4 is the construction elevational schematic view of step 4 of the present invention；

Fig. 5 is the sectional view of Fig. 4；

Fig. 6 is the construction elevational schematic view of step 5 of the present invention；

Fig. 7 is the construction elevational schematic view of step 6 of the present invention；

Fig. 8 is the sectional view of Fig. 7；

Fig. 9 is the construction elevational schematic view of step 7 of the present invention；

Figure 10 is the construction elevational schematic view of step 8 of the present invention；

Figure 11 is the sectional view of Figure 10；

Figure 12 is the construction elevational schematic view of step 9 of the present invention.

Specific embodiment

Below incorporated by reference to shown in Fig. 1 to Figure 12, a kind of construction method of large span gate-type upper beam Split type supporting stand of the present invention, Including following specific steps:

The first step constructs two parallel king-posts 1, and steel box-girder 11 is installed in the bottom between king-post 1, utilizes climbing formwork for construction When to 2/4 position of built-in fitting of design, pre-buried fixation respectively；After the construction to tower top of king-post 1, then the cavity inside king-post 1 Middle installation reinforcing rod 4, to ensure the bonding strength of built-in fitting 3, please refers to shown in Fig. 1；

Second step, using tower crane 5 lift by crane chord member 6.3, upper connection frame 7 and lower connection frame 8 to steel box-girder top king-post it Between, to chord member 6.3, upper connection frame 7 and the assembled formation π type truss 6 of lower connection frame 8, transfers at π type truss 6 to built-in fitting 3, lead to It crosses built-in fitting 3 π type truss 6 and king-post 1 is fixed, please refers to shown in Fig. 2；

Third step installs lifting device 10 at the top of king-post 1, and lifting π type truss 6 to built-in fitting position and is welded and fixed, Then the box truss 12 being soldered in 11 top surface group of steel box-girder lifts by crane box truss 12 to built-in fitting 2 using lifting device 10 Position is simultaneously welded and fixed, and please refers to shown in Fig. 3；

4th step installs needle beam, disk buckle type scaffold and template system in 6 top surface of π type truss, pours completion in three times Horizontal gird 13.1 please refers to shown in Fig. 4 and Fig. 5；

Hanging lowering system 14 is arranged in 13.1 top surface of horizontal gird, in the small cross for removing 6 top surface of π type truss in 5th step After beam, disk buckle type scaffold and template system, hanging lowering system 14 is connect with chord member 6.3, connection frame 7 in dismounting please join It reads shown in Fig. 6；

6th step, following connection frame 8 are support, install crossbeam, stringer, disk in 8 top surface of lower connection frame of 1 inside of king-post Buckle type scaffold and template system, and completion is poured three times in 1 inside of king-post and to the installation upper punishment of connection frame 7 is applied to The ladder-like ornamental blocks 13.2 in top, please refer to shown in Fig. 7 and Fig. 8；

7th step is removed lower connection frame 8 using hanging lowering system 14, is please referred to shown in Fig. 9；

8th step is support with box truss 12, installs needle beam, disk buckle type scaffold and mould in 12 top surface of box truss Plate system, and completion lower part ornamental blocks are poured three times in 1 inside of king-post and to the installation lower punishment of connection frame 8 is applied to 13.3, it please refers to shown in Figure 10 and Figure 11；

The lifting of box truss 12 is fallen to 11 top surface of steel box-girder using hanging lowering system 14 and removed, so far by the 9th step The whole constructions and the dismounting work of Split type supporting stand for completing gate-type upper beam 13, please refer to shown in Figure 12.

It is worth noting that lower connection frame 8 of the invention include four first battered legs 81, strut 82 and pull rod 83, four The interval of first battered leg 81 setting, and one end of the first battered leg 81 is obliquely connected with the built-in fitting on king-post 1, it draws 83 one end of bar is connected with the other end of the first battered leg 81, and the other end of pull rod 83 is made to be connected with the built-in fitting on king-post 1, strut 82 one end are connected with pull rod 83, and the other end of strut 82 is connected to the middle part of the first battered leg 81, and adjacent first battered leg 81 passes through Outstanding pull rod 84 is connected, and specific structure is refering to shown in Fig. 3 and Fig. 4.

Upper connection frame 7 of the invention includes four frame bodies 71 and hanging stick 72, and four frame bodies 71 are in isosceles trapezoid shape, frame body 71 Waist be connected respectively with the bottom face of the pull rod 83 of lower connection frame 8 and chord member 6.3, adjacent frame body 71 by hanging stick 72 be connected, Frame body 71 of the invention is made of first body of rod 711, second body of rod 712 and support rod 713, first body of rod 711 and second body of rod 712 are arranged in parallel, and the length of first body of rod 711 is greater than the length of second body of rod 712, first body of rod 711 and second body of rod 712 It is connected by support rod 713.

In detail include second step in second step, the lower connection frame 8 of π type truss 6 is lifted by crane using tower crane 5, utilizes king-post 1 The cone of climbing reserved on inner sidewall is first fixed temporarily outside the first battered leg of two panels 81, is arranged between the first battered leg of two panels 81 later outstanding Pull rod 84, then inside the first battered leg of two panels 81 is installed in lifting, and is fixed by strut 82, the positioning of pull rod 83, to the left and right sides Lower connection frame 8 be respectively mounted in place after, rise and hang on connection frame 7 (including four frame bodies 71 and hanging stick 72), upper connection frame 7 and lower company It connects and is connected between frame 8 by bolt 80, finally lift by crane chord member 6.3 (including outside two panels chord member 6.3.1 and inside two panels chord member 6.3.2 it) and with upper connection frame 7 is connected firmly, completes whole spellings of π type truss 6.

Complete it is assembled to chord member 6.3, upper connection frame 7 and lower connection frame 8 form π type truss 6, transfer π type truss 6 to pre- It is by built-in fitting that π type truss 6 and king-post 1 is fixed at embedded part.

In the 5th step, needle beam, disk buckle type scaffold and the template system of 6 top surface of π type truss are removed first, next is torn open Except the outstanding pull rod 84 between the hanging stick 72 and lower connection frame 8 between upper connection frame 7, then in 13.1 top surface of horizontal gird, setting is hung Hang lowering system 14, hanging lowering system 14 connect with chord member 6.3, then after divide 4 times, sequentially release and go up connection frame 7 Bolt 80 between lower connection frame 8, when the deviation that will finally move longitudinally every time is extremely noiseless with lower connection frame 8, under lifting It puts to 12 top surface of box truss to be divided into after loose mail and falls to the dismounting of 11 top surface of steel box-girder, the loose mail portion that wherein chord member 6.3 is divided It pours in separately with to the working crossbeam of the ladder-like ornamental blocks 13.2 in top.

In conclusion main advantage of the invention is as follows:

1, console mode steel-pipe pile bracket is compared, can shorten the construction period, save investment；

2, compared to no console mode overall steel structure bracket, by installation number by being reduced three times to primary, the energy effectively save duration.

Finally, the present processes are only preferable embodiment, it is not intended to limit the scope of the present invention.It is all Within the spirit and principles in the present invention, any modification, equivalent replacement, improvement and so on should be included in protection of the invention Within the scope of.