CN205636496U - A interim strutting arrangement that is used for support frame bridge crane and whole hole case roof beam - Google Patents

Abstract

The utility model relates to a bridge construction equipment field, in particular to an interim strutting arrangement that is used for support frame bridge crane and whole hole case roof beam, it includes: the support post, it is a plurality of the support post is installed vertically on the pier cushion cap, and along bridge mileage direction distribution in the pier both sides, the distribution roof beam, it is a plurality of the distribution roof beam install horizontally in the support post top by the individualistic pier, is located the platform that is used for support frame bridge crane and whole hole case roof beam is formed with the distribution roof beam of one side to the pier, temporary support, temporary support install in distribution back portion, temporary support top contact whole hole case breast portion, an object of the utility model is to provide a with low costs, simple to operate's an interim strutting arrangement that is used for support frame bridge crane and whole hole case roof beam.

Description

A kind of supporting apparatus for supporting Bridge Erector and whole opening box girder

Technical field

This utility model relates to equipment for bridge construction field, is used for supporting Bridge Erector and whole particularly to one The supporting apparatus of hole box beam.

Background technology

Existing continuous rigid frame section assembling bridge master-plan is that short segment box beam uses beam field prefabricated and transports to existing , use bridge support equipment to be completed whole across assembled and complete prestressing force and pull into whole bridge, then profit With spanning equipment, whole bridge is placed on temporary support, after integrin simply supported beam has been constructed, then by logical Water after long tension of prestressed tendon and concrete make cast-in-place piece of multispan simply supported beam and pier top and bridge pier be connected as one whole Body, forms integrin Continuous Rigid-framed Girder；

Its main construction method and uses short for prefabricated subsection box beam high position cantilever for using Segmental assembling bridge-erecting machine Stretch-draw prestressing force steel strand wires Cheng Qiao (simply-supported state), then utilizes Bridge Erector to be fallen by full wafer simply supported beam in design Temporary support fasten after-frame bridge machine cross step into row next across construction, treat a bridge (general 4 across) After having constructed, elongated prestress wire stretch-draw is used to become continuous beam and carry out prestress hole path pressure grouting, Rear utilization pours mixed earth and cast-in-place with bridge pier and pier top piece of integrin bridge is connected, and treats that concrete strength reaches After requirement, removing falsework system, integrin bridge completes to be supported by falsework and is transformed into bridge pier support, complete Become the construction of integrin continuous rigid frame section assembling bridge；

In prior art, temporary support uses large-scale hydraulic equipment, and structure is complicated, and cost is the highest, and peace Dress inconvenience.

Utility model content

The purpose of this utility model is to overcome the above-mentioned deficiency in the presence of prior art, it is provided that a kind of cost Supporting apparatus for supporting Bridge Erector and whole opening box girder low, easy for installation.

In order to realize above-mentioned utility model purpose, this utility model provides techniques below scheme:

A kind of supporting apparatus for supporting Bridge Erector and whole opening box girder, comprising:

Support post, some described support posts are installed on pier cap vertically, and along bridge mileage side To being distributed in bridge pier both sides；

Distribution beam, some described distribution beam are horizontally installed on described support post top, by single bridge pier, The distribution beam being positioned at described bridge pier the same side forms for the platform supporting Bridge Erector and whole opening box girder；

Temporary support, described temporary support is installed on described distribution beam top, described temporary support top contact Bottom described whole opening box girder；

Support means is changed into support post, distribution beam and temporary support these three steel from existing hydraulic system The combinative structure of component, has saved cost, and has used assembled form instead, can carry out according to different operating modes The assembly of different schemes, easy for installation.

As preferred version of the present utility model, it also includes:

Micro-tensioning system, described micro-tensioning system is made up of some jack, is arranged on described distribution beam top with whole Between bottom the box beam of hole, and described temporary support is staggeredly arranged, bridge absolute altitude when becoming bridge continuously for bridge Adjust.

As preferred version of the present utility model, it also includes:

Bracket, described bracket is fixedly installed in described support post top and extends outside described bridge pier, torr It is provided with diagonal brace below frame and between support post periphery；

Described support post is arranged at the both sides of adjacent two bridge pier, and it is big that described bracket is installed on bridge On mileage direction on support post foremost, when bracket act as Bridge Erector via, front auxiliary leg erect-position, Use special column (original column is set up diagonal brace and formed bracket structure).

As preferred version of the present utility model, depend between the described support post periphery that same bridge pier is other Secondary being fixed by steel pipe or shaped steel is connected, and connects each other, makes an intensity higher framework is integrally formed, More stable.

As preferred version of the present utility model, described distribution beam is H profile steel, the opening direction court of H profile steel To level, the H profile steel quantity of described bridge pier one side is 2, forms described platform side by side, and this structure makes The intensity of described platform is higher.

As preferred version of the present utility model, it is provided with level between described support post and described bridge pier and props up Support arrangement, described horizontal support device one end is fixed on the periphery of described support post, and the other end is fixed In described bridge pier side, support post and bridge pier preferably cooperate, make single unit system support box beam time, More stable, intensity is higher, and effect is more preferable.

As preferred version of the present utility model, described support post is symmetrically distributed in bridge pier both sides, to box beam Support effect is more preferable, simultaneously more preferable with the effect cooperated of bridge pier.

As preferred version of the present utility model, lay respectively at described bridge pier both sides and be positioned at bridge pier mileage side Connect by shaped steel is fixing between the support post outermost periphery of homonymy, the steel construction that at this, shaped steel is formed Middle part and described bridge pier between be also equipped with described horizontal support device, make single unit system support box beam time, More stable, intensity is higher, and effect is more preferable, simultaneously also more preferable with the effect cooperated of bridge pier, mutually assists With making both of which more stable.

As preferred version of the present utility model, described support post is spliced by some steel cylinder superpositions, Convenient installation, dismounting, and transport, storage.

As preferred version of the present utility model, described steel cylinder includes the multiple cylinder of differing heights, adapts to The bridge pier of differing heights, and more multi-state, adaptability is higher.

Compared with prior art, the beneficial effects of the utility model:

Low cost, easy for installation.

Accompanying drawing illustrates:

Fig. 1 is the direction across bridge schematic diagram that this utility model is implemented；

Fig. 2 is that the suitable bridge of this utility model enforcement is to schematic diagram；

Labelling in figure: 1-support post, 2-distribution beam, 3-temporary support, 4-micro-tensioning system, 5-whole hole case Beam, 6-bridge pier.

Detailed description of the invention

Below in conjunction with embodiment and detailed description of the invention, this utility model is described in further detail.But no This should being interpreted as, the scope of the above-mentioned theme of this utility model is only limitted to below example, all based on this practicality The technology that novel content is realized belongs to scope of the present utility model.

Embodiment 1

The technical scheme that the present embodiment is concrete, is suitable for 4 across the bridge of one (4 × 40m), concrete, public Opened the supporting apparatus for supporting Bridge Erector and whole opening box girder, as Fig. 1,2, comprising:

Support post 1, some described support posts 1 are installed on bridge pier 6 cushion cap vertically, and along bridge Cheng Fangxiang is symmetrically distributed in bridge pier 6 both sides, between described support post 1 periphery that same bridge pier 6 is other Pass sequentially through steel pipe or the fixing connection of shaped steel, between described support post 1 and described bridge pier 6, be provided with level Support means, described horizontal support device one end is fixed on the periphery of described support post 1, the other end Be fixed on described bridge pier 6 side, lay respectively at described bridge pier 6 both sides and be positioned at bridge pier 6 mileage direction with Connect by shaped steel is fixing between the support post 1 outermost periphery of side, the steel construction that at this, shaped steel is formed It is also equipped with described horizontal support device, support post 1 described in the present embodiment between middle part and described bridge pier 6 Being spliced by some steel cylinder superpositions, described steel cylinder includes the multiple cylinder of differing heights, described circle Cylinder 820mm, thickness is 12mm, material use Q235, according to differing heights be divided into 4m, 2m, 1m, The sections (bridge pier 6 height 3m-21m) of 0.5m；

Distribution beam 2, some described distribution beam 2 are horizontally installed on described support post 1 top, single bridge Pier 6 is other, and the distribution beam 2 being positioned at described bridge pier 6 the same side forms for supporting Bridge Erector and whole opening box girder 5 Platform, described distribution beam 2 is that (a length of 3500mm, width is 300mm to H profile steel, in H profile steel Vertical steel plate thickness 8mm, horizontally disposed steel plate thickness 6mm), the opening direction of H profile steel towards level, The H profile steel quantity of described bridge pier 6 one side is 2, forms described platform side by side；

Temporary support 3, described temporary support 3 is installed on described distribution beam 2 top, and described temporary support 3 pushes up Portion contacts bottom described whole opening box girder 5, and described temporary support 3 is 600mm's for external diameter in the present embodiment Between bottom sand cylinder, the top of temporary support 3 described in the present embodiment and whole opening box girder 5, resistance to compression rubber blanket is set；

Micro-tensioning system 4, described micro-tensioning system 4 is made up of some 500T jack, is arranged on described distribution beam Between bottom 2 tops and whole opening box girder 5, and described temporary support 3 is staggeredly arranged；

Bracket, described bracket is fixedly installed in described support post 1 top and extends outside described bridge pier 6, It is provided with diagonal brace below bracket and between support post 1 periphery；

Described support post 1 is arranged at the both sides of adjacent two bridge pier 6, and described bracket is installed on bridge On beam big mileage direction on support post 1 foremost.

Concrete, it being suitable for the technical program, concrete structure inspection calculation process is:

1) load confirms

Bridge Erector is setting up handing-over pier, and owing to pier shaft cannot support, all loads of girder erection by bridging machine state are by facing Time support and undertake, so time load maximum, take maximum span 40m as calculating:

(1) (maximum span is 40m to G1=607.082T, and end bay is the heaviest span, its maximum sections coagulation Tu Liang deadweight is 49T, adds up to beams of concrete deadweight for 607.082T)

(2) G2=20T (construction temporary load(ing))

(3) G3=P bridge machine=4X130T=520T (setting a roof beam in place under operating mode, Bridge Erector rear load-bearing support bearing power)

Temporary support adds up to and bears pressure and be herein:

2P=G1/2+G2/2+G3=607.082/2+10+520=833.5T=8335KN

Therefore it is P=8335/2=4167.5KN that single upright column bears pressure

2) column strength calculates

$\mathrm{\&delta;}=\frac{P}{A}=\frac{4167.5\&times;1000}{\mathrm{\&pi;}({410}^2-{398}^2)}=136.8MPa<\&lsqb;\mathrm{\&delta;}\&rsqb;=235MPa$

Intensity meets the requirements

3) strut stability calculates

Cross sectional moment of inertia is

$I=\frac{\mathrm{\&pi;}\&times;d^4}{64}=\frac{\mathrm{\&pi;}\&times;({820}^4-{796}^4)}{64}=2.5\&times;{10}^9\left({\mathrm{mm}}^4\right)$

The radius of inertia is

$i=\sqrt{\frac{I}{A}}=\sqrt{\frac{2.5\&times;{10}^9}{\mathrm{\&pi;}({820}^2-{796}^2)}}=137mm$

Fixing one end by one end freely to consider, take μ=1, according to design, light pole length at most controls at 5m In, thus obtaining this bar flexibility is

$\mathrm{\&lambda;}=\frac{\mathrm{\&mu;l}}{i}=\frac{1\&times;5000}{137}=36.5<{\mathrm{\&lambda;}}_p=100$

This bar visible be in degree of rubbing bar, therefore use discount coefficient method (" mechanics of materials ", P316, Dan Zuhui Version) can draw(Q235 proportional limit 200MPa)=180MPa

Thus can stablize trouble free service coefficient is

$n=\frac{P_1}{P}=\frac{180\&times;\mathrm{\&pi;}\&times;({410}^2-{398}^2)}{4167.5}=1.26$

Therefore this bar meets stability requirement, if considering unbalance loading, in the range of unbalance loading 10%, stability can meet Requirement.

4) bearing capacity of foundation

This programme column all stands on pile foundation support table, and cushion cap uses C30 concreting, its resistance to compression allowable Intensity is 30MPa, and column compressive stress is far smaller than cushion cap bearing capacity, therefore does not considers.

5) inspection of temporary support intensity is calculated

Temporary support uses, and (model is 300mm × 300mm to lay double H-type steel on steel pipe post × 8mm × 6mm) as distribution beam 2, and consolidate with column；Distribution beam 2 uses a diameter of 600mm Temporary support 3 forms temporary support 3 with base combination, and it is designed with sand as power transmission medium, be equivalent to by Sand is treated as fluid and is calculated as follows:

Pressure is: P=4167.5KN

Compressive stress is:

A, employing ANSYS set up plane 1/4 model, analyze it to cylinder ancient piece of jade, round, flat and with a hole in its centre active force；

B, grid division, mesh width 0.005m；

C, arrange constraint and active force, wherein A is active force 20.4MPa, and B is without frictional constraint；

D, importing interpretation of result, x direction is radial force, and y direction is tangential force；

Can show that maximum radial force is FX=2.2MPa

Maximum tangential force is FY=143.5MPa

All meet the requirements.

Verify qualified after, then carry out concrete construction:

1. overall construction method

(1) whole complete high-order assembled and stretch-draw Cheng Qiaohou across precast segmental beam, control Segmental assembling bridge-erecting machine, by whole Fall to falsework (i.e. upright supports) across box beam, complete single span box beam erection；

(2) Bridge Erector was converted to cross-module formula, and started Bridge Erector and in face of the beam set up, proceed to next across treating Set a roof beam in place position；

(3) after circulation frame completely joins beam sections successively, steel stranded wire penetrating adapter, assembled wet joint template, pour wet seam Concrete, after concrete strength reaches requirement, carries out the permanent stretch-draw of integrin box beam immediately, makes sections case Beam is converted to continuous box girder by simple supported box beam.

(4) remove interim column support, transfer to next and join beam section to be onstructed, carry out next connection beam sections circulation and execute Work.

2. concrete column erection scheme

(1) cushion cap needs to bury φ 20 screw-thread steel and front end tapping underground for column with cushion cap even before non-casting concrete Connect.According to pier axis in length and breadth, the instrument such as tape measure, ink fountain of employing draws column centrage and peace on cushion cap Dress contour line, to ensure the accurate of column installation site.

(2) cushion cap is levelling

The flatness of cushion cap installation site directly affects stability when column integral assembling and bearing load, so holding Platform levelling particularly important.Use level gauge to measure the discrepancy in elevation of its installation site, and use fine sand levelling and spread If the plank that 5cm is thick, it is ensured that every root post plane discrepancy in elevation cannot be greater than 2mm, in four root post installation sites The heart point discrepancy in elevation cannot be greater than 5mm.

(3) Pin is installed and supports

According to cushion cap setting-out position, lifting the oneth Pin standard knot half range also uses diagonal brace support fixing, re-uses automobile Sling other half Pin to specify position, by tightening brace bolt, and use the lumps of wood carve son affixed with pier shaft, All the time an entirety is become.During assembled first segment, it is vertical for strict guarantee；

(4) install section by section

After a Pin completes assembled reinforcing, assembled step section by section of being allowed for access, until it reaches assembled height, it is even Connecting bolt and stay bolt all use electric wrench to fasten, and remain its perpendicularity, it is ensured that column is vertical Stress.

(5) column end face is levelling and sets up H profile steel

After its column installation is carried out in strict accordance with above step, column end face is substantially not present the discrepancy in elevation, but due to Mismachining tolerance and the impact of installation deviation, leg surface there will be uneven phenomenon.If flatness is less than 1mm, Other measures can not be used, if flatness is more than 1mm, before H profile steel is installed, use 1mm thickness Sheet metal is levelling, it is ensured that its homonymy discrepancy in elevation is in 1mm.And distribution beam 2 uses backing plate bolt to carry out with support Effectively connect.

(6) dress temporary support 3 pushes up and adjusts absolute altitude

Put a little by measurement, release the position of temporary support jack and draw its contour line, jack is strictly pacified It is placed at setting-out, is then measured by level gauge and adjust its height, in principle higher than designed elevation 3～5cm at the bottom of beam, After treating that whole opening box girder 5 is completely placed on column by Bridge Erector, then finely tune its position to design altitude, a left side Right employing wedge is spacing.

(7) regulation of body absolute altitude

When beam sections falls after falsework, and Bridge Erector completes via operation immediately.If after Bridge Erector via, Produce the discrepancy in elevation between beam sections and cast-in-place 0# block, when needing to be adjusted, intend using 500T jack pair sections Beam carries out jacking adjustment.

(8) dismounting of falsework

Beam sections complete wet seam pour, permanent prestressing tendon stretch-draw and simply supported beam continuous beam system transform and after After watering belt construction and after reaching concrete design strength, the dismounting of support can be carried out.

Claims (10)

1. for supporting a supporting apparatus for Bridge Erector and whole opening box girder, comprising:

Support post, some described support posts are installed on pier cap vertically, and along bridge mileage directional spreding in bridge pier both sides；

Distribution beam, some described distribution beam are horizontally installed on described support post top, and by single bridge pier, the distribution beam being positioned at described bridge pier the same side forms for the platform supporting Bridge Erector and whole opening box girder；

Temporary support, described temporary support is installed on described distribution beam top, bottom whole opening box girder described in described temporary support top contact.

A kind of supporting apparatus for supporting Bridge Erector and whole opening box girder the most according to claim 1, it is characterised in that also include:

Micro-tensioning system, described micro-tensioning system is made up of some jack, and between being arranged on bottom described distribution beam top and whole opening box girder, and described temporary support is staggeredly arranged.

A kind of supporting apparatus for supporting Bridge Erector and whole opening box girder the most according to claim 2, it is characterised in that also include:

Bracket, described bracket is fixedly installed in described support post top and extends outside described bridge pier, being provided with diagonal brace below bracket and between support post periphery；

Described support post is arranged at the both sides of adjacent two bridge pier, and described bracket is installed on bridge big mileage direction on support post foremost.

A kind of supporting apparatus for supporting Bridge Erector and whole opening box girder the most according to claim 3, it is characterised in that pass sequentially through steel pipe or the fixing connection of shaped steel between the described support post periphery that same bridge pier is other.

A kind of supporting apparatus for supporting Bridge Erector and whole opening box girder the most according to claim 4, it is characterized in that, described distribution beam is H profile steel, and the opening direction of H profile steel is towards level, the H profile steel quantity of described bridge pier one side is 2, forms described platform side by side.

A kind of supporting apparatus for supporting Bridge Erector and whole opening box girder the most according to claim 5, it is characterized in that, it is provided with horizontal support device between described support post and described bridge pier, described horizontal support device one end is fixed on the periphery of described support post, and the other end is fixed on described bridge pier side.

A kind of supporting apparatus for supporting Bridge Erector and whole opening box girder the most according to claim 6, it is characterised in that described support post is symmetrically distributed in bridge pier both sides.

A kind of supporting apparatus for supporting Bridge Erector and whole opening box girder the most according to claim 7, it is characterized in that, connect by shaped steel is fixing between support post outermost periphery that is that lay respectively at described bridge pier both sides and that be positioned at bridge pier mileage direction homonymy, at this, between the middle part of the steel construction that shaped steel is formed and described bridge pier, be also equipped with described horizontal support device.

A kind of supporting apparatus for supporting Bridge Erector and whole opening box girder the most according to claim 8, it is characterised in that described support post is spliced by some steel cylinder superpositions.

A kind of supporting apparatus for supporting Bridge Erector and whole opening box girder the most according to claim 9, it is characterised in that described steel cylinder includes the multiple cylinder of differing heights.