CN106677070A - Construction support and method for overhead large-span heavy-duty cross beam - Google Patents

Abstract

The invention discloses a construction support and method for an overhead large-span heavy-duty cross beam. The construction support comprises a lower bracket supporting structure, an upper bracket supporting structure located above the lower bracket supporting structure, and a middle supporting structure with the bottom supported on the lower bracket supporting structure. The top face of the upper bracket supporting structure is flush with the top face of the middle supporting structure, and the upper bracket supporting structure and the middle supporting structure form a temporary supporting platform for supporting the cross beam to be constructed. A load bearing structure is erected on the temporary supporting platform. The construction method comprises the steps that firstly, the lower bracket supporting structure is installed; secondly, the upper bracket supporting structure and the middle supporting structure are installed; thirdly, the load bearing structure is erected; fourthly, the support is prepressed; fifthly, the upper cross beam is constructed; and sixthly, the support is removed. According to the construction support and method, design is reasonable, construction is easy and convenient, the using effect is good, and the problems that as for an existing floor steel pipe supporting system, cost is high, the erection process is complex, the construction period is long, the construction risk is high, the requirement for supporting stability is high, and the construction progress of the upper cross beam is affected can be effectively solved.

Description

A kind of high-altitude long-span heavy duty construction of beam support and construction method

Technical field

The invention belongs to technical field of bridge construction, more particularly, to a kind of high-altitude long-span heavy duty construction of beam support and Construction method.

Background technology

General cable-stayed bridge entablature (i.e. Cable-stayed Bridge Pylon entablature) construction have heavy duty, high-altitude, greatly across the characteristics of, upper horizontal stroke Beam construction often becomes the heavy difficult point engineering in whole king-post construction.Existing construction method is usually using landing steel pipe support System (i.e. vertical support system), is the construction safety for ensureing entablature works, while to meet force request, console model steel It is mostly based on sill, steel-pipe pile to be set up on sill that pipe is supported, and often sets up certain altitude with Sarasota as attachment It is supported, with the rising of king-post, steel pipe support system gradually rises and reach the construction elevation position of entablature.It is above-mentioned to apply Support system slenderness ratio employed in work method is big, and stability requirement is high, and the requirement to place is larger, and often constructs one section high After degree, needs carry out attachment connection on king-post, it is ensured that the stability of whole mounting system, and because support system rides upon On the basis of sill, it is impossible to carry out entablature and girder synchronous construction, for the project for requiring synchronously to carry out tower beam construction is deposited Interfering, it is impossible to constructed using this kind of arrangement and method for construction.

Meanwhile, above-mentioned landing steel pipe supporting system is suffered from the drawback that and not enough：Firstth, engineering material input amount is big, make Valency is high, high cost；Secondth, it is big to site requirements, floor stand need to be set up on entablature, it is impossible to realize that entablature is same with girder Step construction, causes total lever factor to extend；3rd, the mutual operating area of support phase is set up in the total long construction period of entablature support, high-altitude Length is affected, construction risk is big；4th, need to carry out many places in tower wall pre-buried for support attachment stull, affects king-post presentation quality, after Phase processes loaded down with trivial details；5th, stability of strutting system has high demands；6th, for the construction effect of king-post construction has a significant impact, it is impossible to complete The full advantage for playing the single construction speed of king-post, needs setting up for synchronous arrangement landing steel pipe supporting system, otherwise affects entablature Construction speed.

The content of the invention

The technical problem to be solved is for above-mentioned deficiency of the prior art, there is provided a kind of high-altitude greatly across The heavily loaded construction of beam support of degree, its simple structure, reasonable in design and simple installation, using effect are good, can effectively solving it is existing fall High cost that ground steel pipe supporting system is present, set up process complexity, long construction period, construction risk greatly, stability of strutting system requirement The problems such as height, impact entablature construction speed.

To solve above-mentioned technical problem, the technical solution used in the present invention is：A kind of high-altitude long-span heavy duty construction of beam Support, it is characterised in that：Tie including lower bracket supports structure, positioned at the upper bracket supports of the lower bracket supports superstructure Structure, bottom are supported in the midfoot support structure in the lower bracket supports structure, the upper bracket supports structure and the middle part The top surface flush of supporting construction and the two temporary supporting platform for being supported to constructed crossbeam of composition, crossbeam of constructing is The entablature of Cable-stayed Bridge Pylon, the entablature is in two that horizontal layout and its two ends are respectively supported at the Cable-stayed Bridge Pylon On king-post, the entablature and two king-posts are reinforced concrete structure；It is right to be erected with the temporary supporting platform Entablature carries out the load-carrying members of horizontal support；The lower bracket supports structure includes multigroup being laid in from front to back described in two Lower bracket between king-post, the structure all same of multigroup lower bracket and its be laid in same level；Described in per group Lower bracket includes the two lower brackets being symmetrically laid on same vertical plane in left and right, and two lower brackets are separately fixed at two On the medial wall of the individual king-post；The upper bracket supports structure includes multigroup being laid in from front to back between two king-posts Upper bracket, the structure all same of multigroup upper bracket and its be laid in same level；Per group of upper bracket is equal Including the two upper brackets being symmetrically laid on same vertical plane in left and right, two upper brackets are separately fixed at two towers On the medial wall of post；The outer end of the lower bracket and upper bracket is anchored on king-post；The midfoot support structure includes multigroup The middle bracket being laid in from front to back between two king-posts, the structure all same of multigroup middle bracket and its be laid in In same level, middle bracket described in a group is provided with directly over per group of lower bracket, per group of middle bracket is wrapped The two middle brackets being symmetrically laid on same vertical plane in left and right are included, the bottom of two middle brackets is respectively supported at same group On two lower brackets in the lower bracket, two middle brackets are fastenedly connected and are integrated and are formed a formation vertically Supporting construction, is fastenedly connected by longitudinal connection structure between multiple vertical supporting structures and is integrated；The lower bracket, on Bracket and middle bracket are in vertically to laying.

A kind of above-mentioned high-altitude long-span heavy duty construction of beam support, is characterized in that：The load-carrying members include bearing platform, Multiple tracks rides upon distribution beam on the bearing platform, the bed die of molding construction, distribution beam described in multiple tracks is carried out to entablature It is laid in same level；The bearing platform include multiple tracks be laid in from front to back spandrel girder in same level, The spandrel girder and the perpendicular laying of the vertical supporting structure, the distribution beam and the perpendicular laying of spandrel girder；The bed die In horizontal layout and it is supported in distribution beam described in multiple tracks.

A kind of above-mentioned high-altitude long-span heavy duty construction of beam support, is characterized in that：Also include carrying out two king-posts The interim prestressing apparatus reinforced, the interim prestressing apparatus are laid in from front to back facing in same level including multiple tracks When presstressed reinforcing steel, interim presstressed reinforcing steel described in multiple tracks is in parallel laying, and the two ends of interim presstressed reinforcing steel anchor respectively described in per pass On two king-posts, it is provided with the lateral wall of two king-posts and multiple interim presstressed reinforcing steel is anchored respectively Prestressed anchor.

A kind of above-mentioned high-altitude long-span heavy duty construction of beam support, is characterized in that：The interim prestressing apparatus are located at down Bracket top, the interim prestressing apparatus are located at the lower outside of middle bracket；

Also be provided with multigroup stull between two king-posts from front to back, the structure all same of multigroup stull and its It is laid in same level, multigroup stull is respectively positioned on the lower bracket supports structure lower section；Per group of stull is equal Including it is multiple be from top to bottom laid in it is same vertically on stull, the two ends of each stull are respectively supported at the inner side of king-post On wall；The stull is in horizontal layout and it is in parallel laying with the vertical supporting structure.

A kind of above-mentioned high-altitude long-span heavy duty construction of beam support, is characterized in that：Two king-posts are respectively left side tower Post and the right side king-post on the right side of the left side king-post, all upper bracket composition Left-side support knot on the left side king-post Structure, all upper bracket composition Right side support structure on the right side king-post, the Left-side support structure, Right side support knot The fall girder apparatus supported for the load-carrying members are provided with structure and the midfoot support structure；The fall girder apparatus are in level Lay, all fall girder apparatus arranged in the Left-side support structure, the Right side support structure and the midfoot support structure It is laid in same level, each described fall girder apparatus is the longitudinal direction with the perpendicular laying of the vertical supporting structure Support arrangement.

A kind of above-mentioned high-altitude long-span heavy duty construction of beam support, is characterized in that：The structure of the lower bracket and upper bracket Identical and both at assembled bracket, it is described pre- that the assembled bracket includes that pre-buried structure, many Pin are fixed on from front to back The essence of sizing bracket and multiple tracks in horizontal layout buried in structure pricks screw-thread steel, the structure all same of bracket of shaping described in many Pin and It is laid in same level, per bracket of shaping described in Pin in vertically to laying and it is in the vertical supporting structure Parallel laying, it is in parallel laying that the essence pricks screw-thread steel with the sizing bracket；Bracket of shaping described in per Pin includes horizontal cattle Lower limb and top are fixed on the oblique bracket in the middle part of horizontal support bracket, and the oblique bracket is gradually outward-dipping from top to bottom；It is described pre- Bury structure including upper pre-buried anchor box and immediately below upper pre-buried anchor box under pre-buried anchor box, the upper pre-buried anchor box and under it is pre-buried Anchor box is embedded in advance in king-post；The outer end of the horizontal support bracket is fixed in pre-buried anchor box, the outer end of the oblique bracket Under being fixed in pre-buried anchor box, essence is pricked screw-thread steel and is laid in horizontal support bracket described in multiple tracks, the horizontal support bracket Inside and outside be provided with and multiple the anchorages that anchored of screw-thread steel pricked to essence.

A kind of above-mentioned high-altitude long-span heavy duty construction of beam support, is characterized in that：Two king-posts be open tubular column and The two inside is provided with multiple tracks vertical applied force reinforcing bar, and the anchorage that the horizontal support bracket outside is arranged is located at the sky In the internal cavities of stem；Essence described in multiple tracks is pricked the multiple rows of multiple row of screw-thread steel point and is laid；The upper pre-buried anchor box is pre-buried with The reinforced hole passed through for the vertical applied force reinforcing bar is opened on anchor box.

A kind of above-mentioned high-altitude long-span heavy duty construction of beam support, is characterized in that：The middle bracket includes oblique supporting leg, institute State oblique supporting leg bottom to be supported on lower bracket, on the horizontal support bracket that the oblique supporting leg bottom is fixed in lower bracket, It is in parallel laying that the oblique supporting leg supports the oblique bracket in lower bracket with it；Two in per group of middle bracket are described oblique It is fastenedly connected by transverse truss between supporting leg, the transverse truss is in horizontal layout and itself and the vertical supporting Structure is in parallel laying；The longitudinal connection structure is longitudiual truss, and the longitudiual truss is in horizontal layout and itself and horizontal purlin The perpendicular laying of frame.

Meanwhile, the invention also discloses a height that method and step is simple, reasonable in design and easy construction, using effect are good Empty large span heavy duty crossbeam construction method, it is characterised in that the method is comprised the following steps：

Step one, lower bracket supports structure are installed：It is synchronous from the bottom to top that two king-posts are carried out in work progress, to treat When two king-posts are constructed to the lower bracket supports structure present position, the lower bracket supports structure is pacified Dress；

Step 2, upper bracket supports structure and midfoot support structure are installed：Treat that two king-posts are constructed on described During bracket supports structure present position, the upper bracket supports structure is installed；The upper bracket supports structure is carried out It is synchronous that the midfoot support structure is installed in installation process；Treat the upper bracket supports structure and the midfoot support After the completion of structure is respectively mounted, the temporary supporting platform is obtained；

Step 3, load-carrying members are set up：The load-carrying members are set up on temporary supporting platform, applying for installation forming is obtained Work support；

Step 4, pre-pressing bracket：Precompressed is carried out to construction bracket described in step 3；

Step 5, entablature construction：The construction bracket completed using precompressed, is constructed to entablature；

Step 6, support removing：After the completion for the treatment of entablature construction, the construction bracket is removed.

Said method, is characterized in that：Described in lower bracket and step 2 described in step one in lower bracket supports structure The structure of the upper bracket in upper bracket supports structure is identical and both at assembled bracket, and the assembled bracket includes pre-buried The essence of sizing bracket and multiple tracks in horizontal layout that structure, many Pin are fixed on from front to back on the pre-buried structure pricks screw-thread steel, Shape described in many Pin bracket structure all same and be laid in same level, per shape described in Pin bracket in vertically to Lay and it is in parallel laying with the vertical supporting structure, it is in parallel cloth that the essence pricks screw-thread steel with the sizing bracket If；Bracket of shaping described in per Pin includes that horizontal bracket and top are fixed on the oblique bracket in the middle part of horizontal support bracket, described oblique Bracket is gradually outward-dipping from top to bottom；Under the pre-buried structure is including upper pre-buried anchor box and immediately below upper pre-buried anchor box Pre-buried anchor box, the upper pre-buried anchor box pre-buried anchor box with is embedded in advance in king-post；The outer end of the horizontal support bracket is fixed In upper pre-buried anchor box, under being fixed in pre-buried anchor box, essence is pricked screw-thread steel and is laid in described in multiple tracks for the outer end of the oblique bracket In horizontal support bracket, multiple anchors anchored to essence bundle screw-thread steel are provided with inside and outside the horizontal support bracket Tool；

When lower bracket supports structure is installed described in step one, respectively to the lower bracket supports structure in it is each under Bracket is installed respectively；The installation method all same of all lower brackets；To when lower bracket is installed any one described, first will The upper pre-buried anchor box of the lower bracket and under pre-buried anchor box be embedded in respectively in king-post, then to cattle of shaping described in many Pin of the lower bracket Lower limb is installed respectively；After the completion for the treatment of that sizing bracket is respectively mounted described in many Pin, screw-thread steel is pricked to essence described in multiple tracks and is pacified respectively Dress, essence described in Bing Duige roads is pricked screw-thread steel and carries out tensioning respectively；

When upper bracket supports structure is installed described in step 2, respectively to the upper bracket supports structure in it is each on Bracket is installed respectively；The installation method all same of all upper brackets；To when upper bracket is installed any one described, first will On this upper pre-buried anchor box of bracket and under pre-buried anchor box be embedded in respectively in king-post, then to cattle of shaping described in many Pin of bracket on this Lower limb is installed respectively；After the completion for the treatment of that sizing bracket is respectively mounted described in many Pin, screw-thread steel is pricked to essence described in multiple tracks and is pacified respectively Dress, essence described in Bing Duige roads is pricked screw-thread steel and carries out tensioning respectively；

It is synchronous from the bottom to top in step one that two king-posts are carried out in work progress, also need to install to two towers The interim prestressing apparatus that post is reinforced, the interim prestressing apparatus are laid in from front to back same level including multiple tracks On interim presstressed reinforcing steel, interim presstressed reinforcing steel described in multiple tracks is in parallel laying, the two ends point of interim presstressed reinforcing steel described in per pass It is not anchored on two king-posts, is provided with the lateral wall of two king-posts and multiple interim presstressed reinforcing steel is entered respectively The prestressed anchor of row anchoring；

Carry out in step 4 before pre-pressing bracket, it is first synchronous that tensioning is carried out respectively to interim presstressed reinforcing steel described in multiple tracks.

The present invention has compared with prior art advantages below：

1st, the high-altitude long-span heavy duty construction of beam supporting structure that adopted is simple and processing and fabricating is easy, and engineering is thrown with material Enter that amount is big, low cost, cost is relatively low.

2nd, the high-altitude long-span heavy duty construction of beam supporting structure for being adopted is reasonable in design, mainly ties including lower bracket supports Structure, upper bracket supports structure, midfoot support structure, fall girder apparatus and load-carrying members, while interim prestressing apparatus are additionally provided with, Each component is and molding is pre-machined, and crudy is easy to ensure that scene only need to be installed.

3rd, the high-altitude long-span heavy duty construction of beam support simple installation for being adopted, is directly fixedly mounted on king-post, pacifies Fill short time limit and construction risk is little.

4th, the high-altitude long-span heavy duty construction of beam support for being adopted is little to site requirements, only need to be by lower bracket and upper bracket It is fixed on king-post.Lower bracket is little with taking up room for upper bracket, directly easy, be rapidly secured on king-post, and not King-post work progress and construction quality can be had undesirable effect.Meanwhile, king-post presentation quality is not interfered with, the later stage processes letter It is single.

5th, the high-altitude long-span heavy duty construction of beam support for being adopted can realize entablature and girder synchronous construction so that total Duration significantly shortens.

6th, the high-altitude long-span heavy duty construction of beam support for being adopted is applied widely, can be effectively applicable to span and be more than The construction of beam that 30m, bearing height are more than 50m and quality is more than 1000 tons, while structure stress demand, overall structure can be met Stable, firm, stability of strutting system requires relatively low.

7th, simple structure of the lower bracket with upper bracket, reasonable in design and simple processing are adopted, input cost is relatively low.

8th, the reasonable in design of lower bracket and upper bracket is adopted, pre-buried anchor box is fixed on under using upper pre-buried anchor box On king-post, the pre-buried process of upper pre-buried anchor box pre-buried anchor box with will not be destroyed, it is ensured that the construction of king-post to king-post cage bar Quality.Also, lower bracket and upper bracket are both designed as the structure that essence pricks screw-thread steel and the common stress of sizing bracket, stress clearly and Construction is simple, convenient, and construction quality is easy to ensure.

9th, the interim prestressing apparatus for being adopted and the common stress of Active support structure, have been effectively ensured the entirety of structure Property.

10th, adopt each component of high-altitude long-span heavy duty construction of beam support can process on ground, lift spelling, subtract Work high above the ground is lacked.Each component processing is very convenient, while can realize that building-site is processed.

11st, the bracket in upper bracket supports structure and lower bracket supports structure is both designed as separate type, can be received according to support Power size increases and decreases bracket quantity and pricks the quantity of screw-thread steel with essence, and form of construction work is flexible.

12nd, the high-altitude long-span heavy duty construction of beam support for being adopted is reusable, and turnover rate is higher, can significantly save Cost.

13rd, the high-altitude long-span heavy duty construction of beam support for being adopted uses that easy to operate and using effect is good, practical valency Value is high, energy effectively solving heavy duty, high-altitude, the big construction difficult problem across crossbeam, can be suitably used for different spans, different heavy duties, different height The construction of beam process of empty situation, can realize tower beam synchronous construction, and can overcome various the lacking of landing steel pipe supporting system presence Fall into, overall performance is good.Meanwhile, the monolithic lighter in weight of each component of the construction bracket is easy to the selection of hoisting machine tool, is easy to structure Installation with remove；The revolving height of material, high financial profit can to greatest extent reduce the damage to king-post steel bar stress；Pin To different spans, height, case of heavy load, can freely carry out carrying out spelling combination construction according to stress, it is ensured that version is led to With and standardization.Harmful effect is not had to the work progress of king-post, the advantage of the single construction speed of king-post can be completely played, no The construction speed of entablature can be affected.

14th, the construction method step that adopted is simple, reasonable in design and easy construction, construction quality are easily controllable, can letter Just entablature work progress, is rapidly completed, and work progress is safe and reliable.

In sum, reasonable in design and easy construction of the invention, using effect are good, can the existing landing steel pipe of effectively solving High cost that support body system is present, set up process complexity, long construction period, construction risk greatly, stability of strutting system have high demands, in impact The problems such as construction of beam progress.

Below by drawings and Examples, technical scheme is described in further detail.

Description of the drawings

Fig. 1 is the Construction State schematic diagram of construction bracket of the present invention.

Fig. 2 is the side portion structure schematic diagram of construction bracket of the present invention.

Fig. 3 is the installation position schematic diagram of bracket under the present invention.

Fig. 4 is the structural representation of many Pin sizings brackets in bracket under the present invention.

Fig. 5 is the structural representation of many Pin sizings brackets in bracket in the present invention.

Fig. 6 is method flow block diagram when being constructed to high-altitude long-span heavy duty crossbeam using the present invention.

Fig. 7 is the front installation position schematic diagram that hanging apparatus are adopted when the present invention is removed to construction bracket.

Fig. 8 is the side installation position schematic diagram that hanging apparatus are adopted when the present invention is removed to construction bracket.

Description of reference numerals:

1-entablature；2-king-post；3-lower bracket；

4-upper bracket；5-middle bracket；6-interim presstressed reinforcing steel；

7-fall girder apparatus；8-spandrel girder；9-distribution beam；

10-bed die；11-stull；12-horizontal bracket；

13-oblique bracket；14-upper pre-buried anchor box；15-under pre-buried anchor box；

16-oblique supporting leg；17-transverse truss；18-longitudiual truss；

19-essence pricks screw-thread steel；20-avris suspension rod；21-middle part suspension rod.

Specific embodiment

A kind of high-altitude long-span heavy duty construction of beam support as shown in Figure 1 and Figure 2, including lower bracket supports structure, be located at The upper bracket supports structure of the lower bracket supports superstructure, bottom are supported in the middle part in the lower bracket supports structure Support structure, the top surface flush of the upper bracket supports structure and the midfoot support structure and the two composition are to constructed crossbeam The temporary supporting platform being supported, crossbeam of constructing is the entablature 1 of Cable-stayed Bridge Pylon, and the entablature 1 is in horizontal layout And its two ends is respectively supported on two king-posts 2 of the Cable-stayed Bridge Pylon, the entablature 1 is with two king-posts 2 Reinforced concrete structure；Being erected with the temporary supporting platform carries out the load-carrying members of horizontal support to entablature 1；Under described Bracket supports structure includes multigroup lower bracket 3 being laid in from front to back between two king-posts 2, multigroup lower bracket 3 Structure all same and its be laid in same level；Per group of lower bracket 3 includes that left and right two is symmetrically laid in Lower bracket 3 on same vertical plane, two lower brackets 3 are separately fixed on the medial wall of two king-posts 2；On described Bracket supports structure includes multigroup upper bracket 4 being laid in from front to back between two king-posts 2, multigroup upper bracket 4 Structure all same and its be laid in same level；Per group of upper bracket 4 includes that left and right two is symmetrically laid in Upper bracket 4 on same vertical plane, two upper brackets 4 are separately fixed on the medial wall of two king-posts 2；Under described The outer end of bracket 3 and upper bracket 4 is anchored on king-post 2；The midfoot support structure is laid in from front to back two including multigroup Middle bracket 5 between the individual king-post 2, the structure all same of multigroup middle bracket 5 and its be laid in same level, The surface of per group of lower bracket 3 is provided with middle bracket 5 described in a group, and per group of middle bracket 5 includes left and right two The middle bracket 5 being symmetrically laid on same vertical plane, the bottom of two middle brackets 5 is respectively supported at lower cattle described in same group On two lower brackets 3 in lower limb 3, two middle brackets 5 are fastenedly connected and are integrated and are formed a formation vertical supporting Structure, is fastenedly connected by longitudinal connection structure between multiple vertical supporting structures and is integrated；The lower bracket 3, upper cattle Lower limb 4 and middle bracket 5 are in vertically to laying.

In the present embodiment, the lower bracket supports structure includes lower bracket 3, the upper bracket supports structure bag described in four groups Upper bracket 4 described in four groups is included, the midfoot support structure includes middle bracket 5 described in four groups.The surface of per group of lower bracket 3 It is provided with upper bracket 4 described in a group.

During practice of construction, can according to specific needs, to the quantity of lower bracket 3 included by the lower bracket supports structure and respectively The installation position of the group lower bracket 3, upper bracket described in the quantity and each group of upper bracket 4 included by the upper bracket supports structure The installation position of middle bracket 5 described in the quantity and each group of 4 installation position and middle bracket 5 included by the midfoot support structure Adjust accordingly respectively.

In the present embodiment, the weight of the entablature 1 up to 2025 tons, support system apart from ground 116m, apart from sill Top surface 99m, span reaches 37m, and requires tower beam synchronous construction, therefore does not reach construction using traditional landing steel pipe supporting system Require.

In the present embodiment, high-altitude long-span heavy duty construction of beam support of the present invention is also included to two towers The interim prestressing apparatus that post 2 is reinforced, the interim prestressing apparatus are laid in from front to back same level including multiple tracks Interim presstressed reinforcing steel 6 on face, interim presstressed reinforcing steel 6 described in multiple tracks is in parallel laying, the two of interim presstressed reinforcing steel 6 described in per pass End is anchored at respectively on two king-posts 2, is provided with the lateral wall of two king-posts 2 multiple respectively in advance should temporarily The prestressed anchor that power muscle 6 is anchored.

During practice of construction, the interim prestressing apparatus are located at the top of lower bracket 3, during the interim prestressing apparatus are located at The lower outside of bracket 5.

In the present embodiment, the interim presstressed reinforcing steel 6 is prestress wire.

Due in the concreting process of entablature 1 horizontal force can be produced to king-post 2, to prevent king-post 1 from shifting, adopt in advance King-post 2 is further applied load with the interim prestressing apparatus, the stability of king-post 2 can be effectively ensured.High-altitude of the present invention is big Span heavy duty construction of beam support is active supporting construction, and the interim prestressing apparatus are applied in the high-altitude long-span heavy duty crossbeam Tensioning is carried out before work pre-pressing bracket, entablature 1 is carried out in work progress, the interim prestressing apparatus and the high-altitude long-span Heavily loaded construction of beam support entirety stress, is further ensured that construction safety.

In the present embodiment, multigroup stull 11, multigroup stull 11 are also provided between two king-posts 2 from front to back Structure all same and its be laid in same level, multigroup stull 11 is respectively positioned under the lower bracket supports structure Side；Per group of stull 11 include it is multiple be from top to bottom laid in it is same vertically on stull 11, each stull 11 Two ends are respectively supported on the medial wall of king-post 2；The stull 11 is in horizontal layout and it is in flat with the vertical supporting structure Row is laid.

In the present embodiment, per group of stull 11 includes two stulls 11.

During practice of construction, according to specific needs phase can be carried out to the quantity of included stull 11 in stull per group described 11 Should adjust.

In the present embodiment, the load-carrying members include that bearing platform, multiple tracks ride upon the distribution on the bearing platform Beam 9, the bed die 10 that molding construction is carried out to entablature 1, distribution beam 9 is laid in same level described in multiple tracks；It is described to hold Galassing platform includes that multiple tracks is laid in from front to back the spandrel girder 8 in same level, the spandrel girder 8 and ties with the vertical supporting The perpendicular laying of structure, the distribution beam 9 and the perpendicular laying of spandrel girder 8；The bed die 10 in horizontal layout and its be supported in it is many In distribution beam 9 described in road.

The spandrel girder 8 is Bailey beam, and the distribution beam 9 is I-steel.During practice of construction, the spandrel girder 8 and distribution Beam 9 can also adopt other types of beam body.

The load that the beam body weight for mainly undertaking entablature 1 of the spandrel girder 8 and construction are produced, is to ensure entablature 1 Beam body it is linear, spandrel girder 8 need to possess enough intensity and rigidity.The distribution beam 9 is placed in the Bailey beam.This enforcement In example, the spacing described in adjacent twice between distribution beam 9 is 75cm, and such laying spacing can be effectively ensured all distribution beams 9 All on Bailey beam node.The bed die 10 is made using the lumps of wood with bamboo slab rubber, is placed in distribution beam 9 and is formed bed die system System, operation platform is provided together with spandrel girder 8 for the construction of entablature 1.

Two king-posts 2 are respectively left side king-post and the right side king-post on the right side of the left side king-post, the left side The composition Left-side support structure of all upper bracket 4 on king-post, the composition Right side support knot of all upper bracket 4 on the right side king-post Structure, is provided with for load-bearing knot in the Left-side support structure, the Right side support structure and the midfoot support structure The fall girder apparatus 7 that structure is supported；The fall girder apparatus 7 be in horizontal layout, the Left-side support structure, the Right side support structure and The all fall girder apparatus 7 arranged in the midfoot support structure are laid in same level, and each described fall girder apparatus 7 is equal It is the longitudinal bracing device with the perpendicular laying of the vertical supporting structure.

In the present embodiment, the fall girder apparatus 7 arranged in the Left-side support structure and the Right side support structure are in symmetrical Lay, two fall girder apparatus 7 are symmetrically arranged with the midfoot support structure.

During practice of construction, can according to specific needs, to the quantity of set fall girder apparatus 7 in the midfoot support structure and The installation position of each fall girder apparatus 7 is adjusted accordingly respectively.

In the present embodiment, the fall girder apparatus 7 by many spiral steel pipe processing and fabricatings longeron, the two of the spiral steel pipe End is covered with steel plate.

The Main Function of the lowering device 7 be transmit spandrel girder 8 load to the upper bracket supports structure, it is described in In portion's supporting construction and the lower bracket supports structure, and the beam that can be used to falling after the concreting of entablature 1 of lowering device 7 makes With.

In the present embodiment, the lowering device 7 and the Left-side support structure, the Right side support structure and the middle part It is fixedly connected using welding manner between supporting construction.

As shown in figure 3, the lower bracket 3 is identical with the structure of upper bracket 4 and both at assembled bracket, the assembling It is in horizontal layout that formula bracket includes that pre-buried structure, many Pin are fixed on from front to back sizing bracket and multiple tracks on the pre-buried structure Essence prick screw-thread steel 19, the structure all same of bracket of shaping described in many Pin and be laid in same level, it is fixed described in per Pin Type bracket in vertically to laying and it is in parallel laying with the vertical supporting structure, the essence prick screw-thread steel 19 with it is described Sizing bracket is in parallel laying；Bracket of shaping described in per Pin includes that horizontal bracket 12 and top are fixed on horizontal support bracket 12 The oblique bracket 13 at middle part, the oblique bracket 13 is gradually outward-dipping from top to bottom；The pre-buried structure includes upper pre-buried anchor box 14 With immediately below upper pre-buried anchor box 14 under pre-buried anchor box 15, the upper pre-buried anchor box 14 and under pre-buried anchor box 15 be embedded in advance In king-post 2；The outer end of the horizontal support bracket 12 is fixed in pre-buried anchor box 14, and the outer end of the oblique bracket 13 is fixed on Under in pre-buried anchor box 15, essence is pricked screw-thread steel 19 and is laid in horizontal support bracket 12 described in multiple tracks, the horizontal support bracket Multiple anchorages anchored to essence bundle screw-thread steel 19 are provided with inside and outside 12.

In the present embodiment, it is provided with the horizontal support bracket 12 for multiple respectively for leading to that essence bundle screw-thread steel 19 is passed through Hole, the through hole is in vertically to the Long Circle hole laid.

In the present embodiment, two king-posts 2 be open tubular column and the two inside be provided with multiple tracks vertical applied force reinforcing bar, The anchorage that the outside of the horizontal support bracket 12 is arranged is located in the internal cavities of the open tubular column.

Essence is pricked 19 points of multiple rows of multiple rows of screw-thread steel and is laid described in multiple tracks；The upper pre-buried anchor box 14 pre-buried anchor box 15 with On open the reinforced hole passed through for the vertical applied force reinforcing bar.

In the present embodiment, the sizing bracket and upper pre-buried anchor box 14 and under welding manner is adopted between pre-buried anchor box 15 It is fixedly connected.

In the present embodiment, the upper pre-buried anchor box 14 pre-buried anchor box 15 with is processed using steel plate.It is described pre- Bury anchor box 14 cross section be rectangle, it is described under pre-buried anchor box 15 include upside steel plate and below the upside steel plate under Side steel plate, upside steel plate laying perpendicular with the downside steel plate and forms and connects as one, the upside steel plate and institute The left and right sides for stating downside steel plate is blocked by triangular plate.

During practice of construction, the upper pre-buried anchor box 14 and under pre-buried anchor box 15 when casting concrete is carried out to king-post 2 Pre-buried, the depth goed deep into inside king-post 2 is not less than 30cm.To ensure cage bar (the i.e. vertical applied force reinforcing bar) spacing of king-post 2, upper Pre-buried anchor box 14 is provided with reinforced hole with on pre-buried anchor box 15, the reinforced hole is slotted hole, to ensure that cage bar is passed through.

In the present embodiment, the horizontal bracket 12 and oblique bracket 13 are spliced using many I-steel.Due to lower cattle Lower limb 3 and upper bracket 4 mainly have horizontal force and vertical force in stress, therefore fining twisted steel 19 is installed on horizontal bracket 12, And carrying out prestretching to essence bundle screw-thread steel 19 makes it be completely counterbalanced by the horizontal force that lower bracket 3 or upper bracket 4 are subject to, and here was designed Need to only consider that essence is pricked screw-thread steel 19 and bears horizontal pull in journey, during actual installation lower bracket 3 and upper bracket 4 with mix The contact surface connecting hole of Xtah Crude Clay structure is split into slotted hole (i.e. described through hole), and the vertical height of the through hole is more than its level width Degree, prevents essence from pricking screw-thread steel 19 and receives vertical shear.Therefore the horizontal force that lower bracket 3 and upper bracket 4 are subject to all pricks screw thread by essence Steel 19 undertakes, and the vertical force of generation is all undertaken by oblique bracket 13, and stress is clear and definite.

As shown in figure 4, in the present embodiment, the lower bracket 3 includes bracket of shaping described in four Pin, and during practice of construction, can According to specific needs, to the installation position of the quantity of the included sizing bracket and sizing bracket described in each Pin in lower bracket 3 Adjust accordingly respectively.

As shown in figure 5, in the present embodiment, the upper bracket 4 includes bracket of shaping described in three Pin, and during practice of construction, can According to specific needs, to the installation position of the quantity of the included sizing bracket and sizing bracket described in each Pin in upper bracket 4 Adjust accordingly respectively.

In stress, the upper bracket 4 is solely subjected to vertical force, and the horizontal pull that upper bracket 4 is subject to pricks spiral shell using prestretching essence Stricture of vagina steel 19 is offset.

In the present embodiment, the middle bracket 5 includes oblique supporting leg 16, and the bottom of oblique supporting leg 16 is supported in lower bracket 3 On, on the horizontal support bracket 12 that the bottom of oblique supporting leg 16 is fixed in lower bracket 3, the oblique supporting leg 16 is propped up with it Oblique bracket 13 in the lower bracket 3 of support is in parallel laying；It is logical between two oblique supporting legs 16 in per group of middle bracket 5 Cross transverse truss 17 to be fastenedly connected, the transverse truss 17 is in horizontal layout and it is in parallel with the vertical supporting structure Lay；The longitudinal connection structure is longitudiual truss 18, and the longitudiual truss 18 is in horizontal layout and it is in transverse truss 17 Vertical runs.

In the present embodiment, the oblique supporting leg 16 is spiral steel pipe.The transverse truss 17 is connected to including upper and lower two Horizontal steel pipe and Duo Gen in per group of middle bracket 5 between two oblique supporting legs 16 is connected to two horizontal steel pipes Between web member.It is attached using welding manner between the horizontal steel pipe and oblique supporting leg 16 and the web member.

In the present embodiment, each described oblique supporting leg 16 is carried out by transverse connecting rod with the king-post 2 on the outside of it It is fastenedly connected, can be so effectively increased the bearing capacity of oblique supporting leg 16.

It is to ensure its stability after the completion of middle bracket 5 is respectively mounted described in each group, is attached using longitudiual truss 18, and Form Crossing brace.

All of upper bracket 4, lower bracket 3 and middle bracket 5 are processed at the scene, are transported to the tower crane of the side of king-post 2 and are lifted by crane Position.The upper bracket 4, lower bracket 3 and middle bracket 5 are steel corbel, and such as construction condition license may also be employed two 4, two lower brackets 3 of upper bracket or two 5 groups of middle brackets weld and to form an entirety and carry out integral installation.

In the present embodiment, the spandrel girder 8 is Bailey beam.

A kind of high-altitude long-span heavy duty crossbeam construction method as shown in Figure 6, comprises the following steps：

Step one, lower bracket supports structure are installed：It is synchronous from the bottom to top that two king-posts 2 are carried out in work progress, When two king-posts 2 are constructed to the lower bracket supports structure present position, the lower bracket supports structure is carried out Install；

Step 2, upper bracket supports structure and midfoot support structure are installed：Treat that two king-posts 2 are constructed on described During bracket supports structure present position, the upper bracket supports structure is installed；The upper bracket supports structure is carried out It is synchronous that the midfoot support structure is installed in installation process；Treat the upper bracket supports structure and the midfoot support After the completion of structure is respectively mounted, the temporary supporting platform is obtained；

Step 3, load-carrying members are set up：The load-carrying members are set up on temporary supporting platform, applying for installation forming is obtained Work support；

Step 4, pre-pressing bracket：Precompressed is carried out to construction bracket described in step 3；

Step 5, entablature construction：The construction bracket completed using precompressed, is constructed to entablature 1；

Step 6, support removing：After the completion for the treatment of that entablature 1 is constructed, the construction bracket is removed.

In the present embodiment, when lower bracket supports structure is installed described in step one, respectively to the lower bracket supports Each lower bracket 3 in structure is installed respectively；The installation method all same of all lower brackets 3；To lower bracket 3 any one described When being installed, first by the upper pre-buried anchor box 14 of the lower bracket 3, pre-buried anchor box 15 is embedded in respectively in king-post 2, then to this with Bracket of shaping described in many Pin of lower bracket 3 is installed respectively；After the completion for the treatment of that sizing bracket is respectively mounted described in many Pin, to multiple tracks institute State essence bundle screw-thread steel 19 to be installed respectively, essence is pricked screw-thread steel 19 and carries out tensioning respectively described in Bing Duige roads；

When upper bracket supports structure is installed described in step 2, respectively to the upper bracket supports structure in it is each on Bracket 4 is installed respectively；The installation method all same of all upper brackets 4；To when upper bracket 4 is installed any one described, First by the upper pre-buried anchor box 14 of bracket on this 4, pre-buried anchor box 15 is embedded in respectively in king-post 2 with, then to many of bracket on this 4 Bracket of shaping described in Pin is installed respectively；After the completion for the treatment of that sizing bracket is respectively mounted described in many Pin, screw thread is pricked to essence described in multiple tracks Steel 19 is installed respectively, and essence is pricked screw-thread steel 19 and carries out tensioning respectively described in Bing Duige roads；

It is synchronous from the bottom to top in step one that two king-posts 2 are carried out in work progress, also need to install to described in two The interim prestressing apparatus that king-post 2 is reinforced, the interim prestressing apparatus are laid in from front to back same water including multiple tracks Interim presstressed reinforcing steel 6 in plane, interim presstressed reinforcing steel 6 described in multiple tracks is in parallel laying, interim presstressed reinforcing steel 6 described in per pass Two ends are anchored at respectively on two king-posts 2, are provided with the lateral wall of two king-posts 2 multiple respectively to interim pre- The prestressed anchor that stress rib 6 is anchored；

Carry out in step 4 before pre-pressing bracket, it is first synchronous that tensioning is carried out respectively to interim presstressed reinforcing steel 6 described in multiple tracks.

The simple structure and small volume of the upper pre-buried anchor box 14 pre-buried anchor box 15 with, takes up room little, and lays Mode flexibly, can meet the construction demand of various entablatures 1.Also, due to the upper pre-buried anchor box 14 and under pre-buried anchor box 15 On open the reinforced hole passed through for the vertical applied force reinforcing bar, thus can be prevented effectively from and cut off the vertical applied force reinforcing bar, can protect The construction quality and structural soundness of card king-post 2, and existing construction method is generally both needed to cut off the vertical applied force reinforcing bar.

In the present embodiment, when two king-posts 2 are constructed to the lower bracket supports structure present position, to king-post 2 are carried out in concreting process, first to the upper pre-buried anchor box 14 of each lower bracket 3 and under pre-buried anchor box 15 carry out respectively it is pre-buried； After institute's casting concrete reaches form removal condition, form removal starts the sizing bracket for installing each lower bracket 3, and king-post 2 continues Normal construction.

In the present embodiment, shape described in each Pin in each described lower bracket 3 between bracket and connected using stiffener.Each Pin The bracket end of the sizing bracket is blocked using steel plate, and stiffener welds the prestretching that screw-thread steel 19 is pricked as essence with closure steel plate End.The sizing bracket top steel plate tiling, it is ensured that overall stress.Essence is installed after the sizing bracket installation and pricks screw-thread steel 19, while carrying out prestretching, totally 6 essences prick screw-thread steel 19 to each lower bracket 3.The essence pricks the tensioning of screw-thread steel 19 using oil top Draw, total stretching force is preferably the summation of the horizontal force that single lower bracket 3 is subject to.

When the elevation location that king-post 2 is constructed to upper bracket 4, start to install bracket 4, the installation method of upper bracket 4 with The installation method of lower bracket 3 is identical consistent.While installing bracket 4, bracket 5 in starting to install.

In the present embodiment, the upper bracket 4, lower bracket 3 and middle bracket 5 in ground machine-shaping, are lifted using tower crane, Cable rope is aided in.

After the upper bracket 4 or lower bracket 3 are lifted in place, leveling is carried out to the oblique bracket 13 of left and right width with level gauge, protected The oblique absolute altitude of bracket 13 of card left and right width is consistent.Adjustment proceeds by middle bracket 5 and welds after finishing.

In the present embodiment, after the completion of the upper bracket supports structure is respectively mounted with the midfoot support structure, also need to each Fall girder apparatus 7 are installed respectively, while putting more energy into respectively to each fall girder apparatus 7.Bearing beam is installed afterwards, bearing beam along along bridge to 4 roads are arranged, is laid with the top of middle bracket 5 in upper bracket 4 respectively.

In the present embodiment, after the completion of the load-carrying members are set up, also need that guardrail is installed.

In the present embodiment, when carrying out pre-pressing bracket in step 4, precompressed is carried out using conventional bridge pre-pressing bracket method.

In the present embodiment, precompressed adopts ton bag earth bag, precompressed weight to enter by 1.2 times of the casting concrete weight of entablature 1 Row precompressed.Before precompressed, the sections of cross-bridges direction points 5 are pressed on spandrel girder 8 and lays observation stations, each section is along bridge to arrangement 2 Observation station.

Before precompressed, the interim prestressing apparatus are carried out with tensioning, stretching force as suffered by king-post 2 the 50% of horizontal thrust enters Row applies.After the completion of precompressed, according to each stage observation station change calculations go out the construction bracket inelastic deformation and Elastic deformation during stand under load, to determine last Beam Elevation

After the completion of release, according to prediction achievement, the bottom elevation of entablature 1 is adjusted, start to lay base plate.Carry out entablature When 1 beam body is constructed, entablature 1 is poured at twice, and intensity is pre- to part up to after 60% after the completion of first time concreting Stress carries out pre- tensioning, controls the getting up early Crack Control of the concreting of entablature 1, and cooperatively holds with the construction bracket Second concrete construction task is carried on a shoulder pole, reduces the stress of the construction bracket.

In the present embodiment, after the completion of the tensioning of the entablature 1 and mud jacking, start to remove the construction bracket.

When removing to the construction bracket, constructed using hand fit's tower crane.In the entablature 1 that construction is completed 4 road outriggers of upper arrangement, outrigger adopts I-steel.

Prestretching is carried out to the load-carrying members of the construction bracket using the beam body of entablature 1, then cut off it is described fall beam dress 7 are put, and part is cut off in cleaning；Then the load-carrying members of the construction bracket that slowly lands are pushed up using oil, the middle part is drop to In supporting construction and the upper bracket supports structure；Then the load-carrying members are dismounted by order from top to bottom.Using pulling Jack each rod member toward beam side to movement, to ensure that tower crane is lifted.After the load-carrying members are removed, then remove the middle part Supporting construction and the lower bracket supports structure.Follow during dismounting and the principle removed afterwards is first installed carries out.

As shown in Figure 7 and Figure 8, four groups of suspension rods, suspension rod described in four groups are respectively provided with the installation position of outrigger described in 4 roads The middle part being laid in described in two groups between avris suspension rod 20 is respectively symmetrically including two groups of symmetrical avris suspension rods 20 laid and two groups , in vertically to laying, per group of middle part suspension rod 21 includes one for suspension rod 21, the avris suspension rod 20 and middle part suspension rod 21 The middle part suspension rod 21, the middle part suspension rod 21 is located on the central axis of entablature 1, two is provided with entablature 1 and is supplied respectively The hole for hoist that middle part suspension rod 21 is passed through, two middle part suspension rods 21 are located at respectively on the left and right sides of the midfoot support structure Side, the bottom of two middle part suspension rods 21 is separately fixed at the left and right sides top of the midfoot support structure；Described in per group Avris suspension rod 20 includes two avris suspension rods 20 for being symmetrically laid in the both sides of entablature 1, and avris suspension rod 20 is distinguished described in two groups Positioned at the Left-side support structure and the Right side support superstructure, the bottom of avris suspension rod 20 is individually fixed in described in two groups In the Left-side support structure and the Right side support structure.When removing to the construction bracket, using hanging described in four groups Bar is engaged with tower crane with jack and each component is removed.

The above, is only presently preferred embodiments of the present invention, and not the present invention is imposed any restrictions, every according to the present invention Any simple modification, change and equivalent structure change that technical spirit is made to above example, still fall within skill of the present invention In the protection domain of art scheme.

Claims (10)

1. a kind of high-altitude long-span heavy duty construction of beam support, it is characterised in that：Including lower bracket supports structure, under described The upper bracket supports structure of bracket supports superstructure, bottom are supported in the knot of the midfoot support in the lower bracket supports structure Structure, the upper bracket supports structure is carried out with the top surface flush and the two composition of the midfoot support structure to constructed crossbeam The temporary supporting platform of support, crossbeam of constructing is the entablature (1) of Cable-stayed Bridge Pylon, and the entablature (1) is in horizontal layout And its two ends is respectively supported on two king-posts (2) of the Cable-stayed Bridge Pylon, the entablature (1) and two king-posts (2) it is reinforced concrete structure；Being erected with the temporary supporting platform carries out the load-bearing knot of horizontal support to entablature (1) Structure；The lower bracket supports structure includes multigroup lower bracket (3) being laid in from front to back between two king-posts (2), many The structure all same of the group lower bracket (3) and its be laid in same level；Per group of lower bracket (3) includes a left side Right two lower brackets (3) being symmetrically laid on same vertical plane, two lower brackets (3) are separately fixed at two towers On the medial wall of post (2)；The upper bracket supports structure includes multigroup being laid in from front to back between two king-posts (2) Upper bracket (4), the structure all same of multigroup upper bracket (4) and its be laid in same level；Per group of upper cattle Lower limb (4) includes the two upper brackets (4) being symmetrically laid on same vertical plane in left and right, and two upper brackets (4) are solid respectively It is scheduled on the medial wall of two king-posts (2)；The outer end of the lower bracket (3) and upper bracket (4) is anchored at king-post (2) On；The midfoot support structure includes multigroup middle bracket (5) being laid in from front to back between two king-posts (2), multigroup The structure all same of the middle bracket (5) and its be laid in same level, the surface of per group of lower bracket (3) is equal Middle bracket (5) described in one group is provided with, per group of middle bracket (5) includes that left and right two is symmetrically laid on same vertical plane Middle bracket (5), the bottom of two middle brackets (5) is respectively supported at described in two in lower bracket (3) described in same group On lower bracket (3), two middle brackets (5) are fastenedly connected and are integrated and are formed a formation vertical supporting structure, Duo Gesuo State to be fastenedly connected by longitudinal connection structure between vertical supporting structure and be integrated；The lower bracket (3), upper bracket (4) and in Bracket (5) is in vertically to laying.

2. according to a kind of high-altitude long-span heavy duty construction of beam support described in claim 1, it is characterised in that：The load-bearing knot Structure includes that bearing platform, multiple tracks ride upon the distribution beam (9) on the bearing platform, carry out molding construction to entablature (1) Bed die (10), distribution beam (9) is laid in same level described in multiple tracks；The bearing platform includes multiple tracks from front to back Spandrel girder (8) in same level, the spandrel girder (8) and the perpendicular laying of the vertical supporting structure are laid in, it is described Distribution beam (9) and the perpendicular laying of spandrel girder (8)；It is described that bed die (10) is in horizontal layout and it is supported in distribution beam described in multiple tracks (9) on.

3. according to a kind of high-altitude long-span heavy duty construction of beam support described in claim 1 or 2, it is characterised in that：Also include The interim prestressing apparatus reinforced to two king-posts (2), the interim prestressing apparatus include multiple tracks from front to back The interim presstressed reinforcing steel (6) being laid in same level, interim presstressed reinforcing steel (6) is in parallel laying, per pass institute described in multiple tracks The two ends for stating interim presstressed reinforcing steel (6) are anchored at respectively on two king-posts (2), on the lateral wall of two king-posts (2) It is provided with multiple prestressed anchors for being anchored to interim presstressed reinforcing steel (6) respectively.

4. according to a kind of high-altitude long-span heavy duty construction of beam support described in claim 3, it is characterised in that：It is described interim pre- Power apparatus are answered to be located at lower bracket (3) top, the interim prestressing apparatus are located at the lower outside of middle bracket (5)；

Also it is provided with multigroup stull (11) between two king-posts (2) from front to back, the structure of multigroup stull (11) is equal It is identical and its be laid in same level, multigroup stull (11) is respectively positioned on the lower bracket supports structure lower section；Often The group stull (11) include it is multiple be from top to bottom laid in it is same vertically on stull (11), each stull (11) Two ends are respectively supported on the medial wall of king-post (2)；The stull (11) is in horizontal layout and itself and the vertical supporting structure In parallel laying.

5. according to a kind of high-altitude long-span heavy duty construction of beam support described in claim 1 or 2, it is characterised in that：Two institutes State king-post (2) and be respectively left side king-post and the right side king-post on the right side of the left side king-post, it is all on the left side king-post Upper bracket (4) constitutes Left-side support structure, all upper bracket (4) the composition Right side support structure on the right side king-post, described It is provided with what is supported for the load-carrying members in Left-side support structure, the Right side support structure and the midfoot support structure Fall girder apparatus (7)；The fall girder apparatus (7) in horizontal layout, the Left-side support structure, the Right side support structure and described The all fall girder apparatus (7) arranged in midfoot support structure are laid in same level, and each described fall girder apparatus (7) is It is the longitudinal bracing device with the perpendicular laying of the vertical supporting structure.

6. according to a kind of high-altitude long-span heavy duty construction of beam support described in claim 1 or 2, it is characterised in that：Under described Bracket (3) is identical with the structure of upper bracket (4) and both at assembled bracket, the assembled bracket include pre-buried structure, The essence of sizing bracket and multiple tracks in horizontal layout that many Pin are fixed on from front to back on the pre-buried structure pricks screw-thread steel (19), many Shape described in Pin bracket structure all same and be laid in same level, per bracket of shaping described in Pin in vertically to cloth And if it is in parallel laying with the vertical supporting structure, it is in parallel cloth that the essence pricks screw-thread steel (19) with the sizing bracket If；Bracket of shaping described in per Pin includes that horizontal bracket (12) and top are fixed on the oblique bracket in the middle part of horizontal support bracket (12) (13), the oblique bracket (13) is gradually outward-dipping from top to bottom；The pre-buried structure includes upper pre-buried anchor box (14) and is located at Pre-buried anchor box (15) under immediately below upper pre-buried anchor box (14), the upper pre-buried anchor box (14) and under pre-buried anchor box (15) it is pre-buried In king-post (2)；The outer end of the horizontal support bracket (12) is fixed in pre-buried anchor box (14), the oblique bracket (13) Under being fixed in pre-buried anchor box (15), essence described in multiple tracks is pricked screw-thread steel (19) and is laid in horizontal support bracket (12) for outer end, Multiple anchorages anchored to essence bundle screw-thread steel (19) are provided with inside and outside the horizontal support bracket (12).

7. according to a kind of high-altitude long-span heavy duty construction of beam support described in claim 6, it is characterised in that：Two towers Post (2) be open tubular column and the two inside be provided with multiple tracks vertical applied force reinforcing bar, horizontal support bracket (12) outside sets The anchorage put is located in the internal cavities of the open tubular column；Essence described in multiple tracks is pricked the multiple rows of multiple row of screw-thread steel (19) point and carries out cloth If；The upper pre-buried anchor box (14) and under open the reinforced hole passed through for the vertical applied force reinforcing bar on pre-buried anchor box (15).

8. according to a kind of high-altitude long-span heavy duty construction of beam support described in claim 6, it is characterised in that：The middle bracket (5) including oblique supporting leg (16), oblique supporting leg (16) bottom is supported on lower bracket (3), oblique supporting leg (16) bottom On the horizontal support bracket (12) that portion is fixed in lower bracket (3), the oblique supporting leg (16) is supported in lower bracket (3) with it Oblique bracket (13) in parallel laying；Between two oblique supporting legs (16) in per group of middle bracket (5) by horizontal stroke It is fastenedly connected to truss (17), the transverse truss (17) is in horizontal layout and it is in parallel with the vertical supporting structure Lay；The longitudinal connection structure is longitudiual truss (18), and the longitudiual truss (18) is in horizontal layout and itself and transverse truss (17) perpendicular laying.

9. it is a kind of using construction bracket as claimed in claim 1 to the high-altitude long-span heavy duty method constructed of crossbeam, it is special Levy and be, the method is comprised the following steps：

Step one, lower bracket supports structure are installed：It is synchronous from the bottom to top that two king-posts (2) are carried out in work progress, treating When two king-posts (2) are constructed to the lower bracket supports structure present position, the lower bracket supports structure is carried out Install；

Step 2, upper bracket supports structure and midfoot support structure are installed：Treat that two king-posts (2) are constructed to the upper cattle During lower limb supporting construction present position, the upper bracket supports structure is installed；The upper bracket supports structure is pacified It is synchronous that the midfoot support structure is installed during dress；Treat that the upper bracket supports structure is tied with the midfoot support After the completion of structure is respectively mounted, the temporary supporting platform is obtained；

Step 3, load-carrying members are set up：The load-carrying members are set up on temporary supporting platform, the construction of installation forming is obtained Frame；

Step 4, pre-pressing bracket：Precompressed is carried out to construction bracket described in step 3；

Step 5, entablature construction：The construction bracket completed using precompressed, is constructed to entablature (1)；

Step 6, support removing：After the completion for the treatment of entablature (1) construction, the construction bracket is removed.

10. in accordance with the method for claim 9, it is characterised in that：Lower cattle described in step one in lower bracket supports structure Lower limb (3) is identical with the structure of the upper bracket (4) in upper bracket supports structure described in step 2 and both at assembled bracket, The assembled bracket includes that the sizing bracket that pre-buried structure, many Pin be fixed on from front to back on the pre-buried structure and multiple tracks are in The essence of horizontal layout pricks screw-thread steel (19), the structure all same of bracket of shaping described in many Pin and is laid in same level, Per bracket of shaping described in Pin, in vertically, to laying and it is in parallel laying with the vertical supporting structure, the essence pricks screw thread Steel (19) is in parallel laying with the sizing bracket；Bracket of shaping described in per Pin includes that horizontal bracket (12) and top are fixed on Oblique bracket (13) in the middle part of horizontal support bracket (12), the oblique bracket (13) is gradually outward-dipping from top to bottom；It is described pre-buried Structure include upper pre-buried anchor box (14) and immediately below upper pre-buried anchor box (14) under pre-buried anchor box (15), the upper pre-buried anchor Box (14) and under pre-buried anchor box (15) be embedded in advance in king-post (2)；The outer end of the horizontal support bracket (12) is fixed on pre- Bury in anchor box (14), pre-buried anchor box (15) is interior under the outer end of the oblique bracket (13) is fixed on, and essence pricks screw-thread steel described in multiple tracks (19) it is laid in horizontal support bracket (12), is provided with inside and outside the horizontal support bracket (12) multiple to essence Prick the anchorage that screw-thread steel (19) is anchored；

When lower bracket supports structure is installed described in step one, respectively to each lower bracket in the lower bracket supports structure (3) installed respectively；The installation method all same of all lower brackets (3)；Lower bracket (3) any one described is installed When, first by the upper pre-buried anchor box (14) of the lower bracket (3) and under pre-buried anchor box (15) be embedded in respectively in king-post (2), then to this Bracket of shaping described in many Pin of lower bracket (3) is installed respectively；After the completion for the treatment of that sizing bracket is respectively mounted described in many Pin, to multiple tracks The essence is pricked screw-thread steel (19) and is installed respectively, and essence is pricked screw-thread steel (19) and carries out tensioning respectively described in Bing Duige roads；

When upper bracket supports structure is installed described in step 2, respectively to each upper bracket in the upper bracket supports structure (4) installed respectively；The installation method all same of all upper brackets (4)；Upper bracket (4) any one described is installed When, first by the upper pre-buried anchor box (14) of bracket on this (4) and under pre-buried anchor box (15) be embedded in respectively in king-post (2), then to this Bracket of shaping described in many Pin of upper bracket (4) is installed respectively；After the completion for the treatment of that sizing bracket is respectively mounted described in many Pin, to multiple tracks The essence is pricked screw-thread steel (19) and is installed respectively, and essence is pricked screw-thread steel (19) and carries out tensioning respectively described in Bing Duige roads；

It is synchronous from the bottom to top in step one that two king-posts (2) are carried out in work progress, also need to install to two towers The interim prestressing apparatus that post (2) is reinforced, the interim prestressing apparatus are laid in from front to back same water including multiple tracks Interim presstressed reinforcing steel (6) in plane, interim presstressed reinforcing steel (6) described in multiple tracks is in parallel laying, interim prestressing force described in per pass The two ends of muscle (6) are anchored at respectively on two king-posts (2), are provided with the lateral wall of two king-posts (2) multiple Interim presstressed reinforcing steel (6) is anchored prestressed anchor respectively；

Carry out in step 4 before pre-pressing bracket, it is first synchronous that tensioning is carried out respectively to interim presstressed reinforcing steel (6) described in multiple tracks.