CN106498853A - A kind of construction method of high ferro across existing railway large-span steel bent cap - Google Patents
A kind of construction method of high ferro across existing railway large-span steel bent cap Download PDFInfo
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- CN106498853A CN106498853A CN201610834374.2A CN201610834374A CN106498853A CN 106498853 A CN106498853 A CN 106498853A CN 201610834374 A CN201610834374 A CN 201610834374A CN 106498853 A CN106498853 A CN 106498853A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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Abstract
Embodiments of the invention disclose a kind of high ferro across the construction method of existing railway large-span steel bent cap.It is related to railroad bridge construction technology, being capable of lifting construction efficiency, raising construction quality.Including：To constructing, base carries out place cure process；Preprocessing is carried out to steel lid beam, the steel lid beam of preprocessing is transported to the construction base of cure process；On-site consolidation is carried out to the steel lid beam of preprocessing；The steel lid beam of the pier shaft lifting assembly based on construction.The present invention is suitable for constructing to the large-span steel bent cap for high ferro across existing railway.
Description
Technical field
The present invention relates to railroad bridge construction technology, more particularly to a kind of high ferro is across existing railway large-span steel bent cap
Construction method.
Background technology
High ferro technology is the important research achievement of China's autonomous innovation, the frontline technology being related to, and is conducive to lifting China
The manufacture level of high-end technology equipment, thus, accelerate high ferro networking and there is great reality and far-reaching significance.
At present, due to the existing railway network of China cover more perfect, thus, in high ferro is built, need across more
Existing railway so that for high ferro build steel lid beam span larger.The larger steel lid beam of span is needed in work progress
Main equipment or large equipment carry out operation, it is desirable to harder construction base and larger construction space, and across both
Railwayed location, in order to not affect the normal operation of existing railway so that construction base space is relatively limited, and base of constructing holds
Easily there is sedimentation, on here construction base, carry out the assembling construction of steel lid beam, efficiency of construction is relatively low, and construction quality cannot be protected
Card.For example, positioned at Hubei Province Huangshi Yangxin County domestic obtain field grand bridge steel transom pier, from West to East cross over Wu Jiutielu,
In the range of bridge site area, physical features is relatively flat, and bridge site area surface water has sulfate attack, and bridge site area earth's surface is more soft, at present, pin
To such construction base, effective steel lid beam construction method is not also proposed.
Content of the invention
In view of this, the embodiment of the present invention provides a kind of construction method of high ferro across existing railway large-span steel bent cap,
Can lifting construction efficiency, improve construction quality, existing when steel Coping Construction is carried out across existing railway to solve, construct base
Ground limited space, construction base easily occur settling that caused efficiency of construction is relatively low, the problem that construction quality cannot be guaranteed.
For reaching above-mentioned purpose, embodiments of the invention are adopted the following technical scheme that：
On the one hand, the embodiment of the present invention provides a kind of construction method of high ferro across existing railway large-span steel bent cap, bag
Include：
To constructing, base carries out place cure process；
Preprocessing is carried out to steel lid beam, the steel lid beam of preprocessing is transported to the construction base of cure process；
On-site consolidation is carried out to the steel lid beam of preprocessing；
The steel lid beam of the pier shaft lifting assembly based on construction；
Described pair of construction base carries out place cure process to be included：
Lifting operation region of the planning comprising loop wheel machine walking position region and Hoisting Position region；
The loose table soil in the lifting operation region is removed, gravelly soil is backfilled, placement in layers is simultaneously compacted, every layer of filling-up thickness
Less than first threshold, top surface is filled beyond pinner face Second Threshold；
In the base surface top layer in the lifting operation region, using fine stone leveling, fine stone thickness 5cm, and push up
Face requires that levelness cannot be greater than 0.3.；
Near transom pier, polylith steel lid beam assembly base area is gone out using the cast-in-place concreting containing embedded iron, with
When preventing steel lid beam field joint, the local sedimentation of construction base causes the linear change of steel lid beam, the construction base to include：Lifting
Operating area and steel lid beam assembly base area.
In conjunction with a first aspect, in the first embodiment of first aspect, carrying out place in described pair of construction base hard
Before change is processed, methods described also includes：
The ground loading ability in the construction base is obtained, if the ground loading ability for obtaining is less than the ground for pre-setting
Face bearing capacity threshold value, executing described pair of construction base carries out place cure process, so that the ground loading in the construction base
Ability is more than the ground loading capacity threshold.
In conjunction with a first aspect, in second embodiment of first aspect, described preprocessing is carried out to steel lid beam include：
According to the sections partition strategy for pre-setting, segmented manufacture is carried out to steel lid beam；
During segmented steel lid beam is manufactured, according to the Quality Control Strategy for pre-setting, in segmented steel
Qualifying point is respectively provided with bent cap.
In conjunction with second embodiment of first aspect, in the third embodiment of first aspect, the quality control
System point includes：Steel plate flatness qualifying point, Numerical control cutting qualifying point, polishing hold out against position processing quality control point,
Assembling quality control point, welding quality control point and coating quality control point.
In conjunction with a first aspect, in the 4th kind of embodiment of first aspect, the steel lid beam to preprocessing carries out existing
Field assembly includes：
Platform for lining is built in the assembled base area, the corresponding steel lid beam of platform for lining first segment and
Below 3rd sections, bearing beam being done using 2 blocks, doing bearing beam using 4 blocks below second section, block is upper and lower
Fang Caiyong steel plate pads；
On-site consolidation order is pressed, and each segmented steel lid beam is unloaded to corresponding assembled position, lifting using 150t truck cranes
After in place, application after carrying out Site Welding, is carried out again.
In conjunction with a first aspect, in the 5th kind of embodiment of first aspect, being entered using the welding method of building site tack welding
Row welding.
In conjunction with the 5th kind of embodiment of first aspect, in the 6th kind of embodiment of first aspect, methods described is also
Including：
Crank detection test is carried out to weld seam and X-ray shoots, to guarantee that weldquality is qualified.
In conjunction with a first aspect, in the 7th kind of embodiment of first aspect, while lifting assembled steel lid beam, institute
Stating method also includes：
Carry out lifting precision controlling.
In conjunction with the 7th kind of embodiment of first aspect, in the 8th kind of embodiment of first aspect, the lifting essence
Degree control includes：Plane control and degree control.
In conjunction with a first aspect, in the 9th kind of embodiment of first aspect, after steel lid beam rigging out, methods described
Also include：
Fill concrete is to pier stud.
Construction method of the high ferro provided in an embodiment of the present invention across existing railway large-span steel bent cap, including：To construction
Base carries out place cure process；Preprocessing is carried out to steel lid beam, the steel lid beam of preprocessing is transported to the construction of cure process
Base；On-site consolidation is carried out to the steel lid beam of preprocessing；The steel lid beam of the pier shaft lifting assembly based on construction；Being capable of lifting construction
Efficiency, raising construction quality, construct base limited space existing when steel Coping Construction is carried out across existing railway to solve,
Construction base easily occurs settling that caused efficiency of construction is relatively low, the problem that construction quality cannot be guaranteed.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is construction method schematic flow sheet of the embodiment of the present invention high ferro across existing railway large-span steel bent cap；
Fig. 2 is the schematic diagram of pre-embedded bolt and positive stop in the present embodiment pier construction；
Fig. 3 is that the present embodiment adopts pre-buried flange location and installation steel column schematic diagram；
Fig. 4 is the present embodiment steel column location and installation schematic diagram.
Specific embodiment
Below in conjunction with the accompanying drawings the embodiment of the present invention is described in detail.
It will be appreciated that described embodiment is only a part of embodiment of the invention, rather than whole embodiment.Base
Embodiment in the present invention, those of ordinary skill in the art obtained under the premise of creative work is not made all its
Its embodiment, belongs to the scope of protection of the invention.
Fig. 1 is construction method schematic flow sheet of the embodiment of the present invention high ferro across existing railway large-span steel bent cap.Ginseng
See Fig. 1, the flow process includes：
Step 101, to constructing, base carries out place cure process；
In the present embodiment, as an alternative embodiment, before described pair of construction base carries out place cure process, the party
Method also includes：
The ground loading ability in the construction base is obtained, if the ground loading ability for obtaining is less than the ground for pre-setting
Face bearing capacity threshold value, executing described pair of construction base carries out place cure process, so that the ground loading in the construction base
Ability is more than the ground loading capacity threshold.
In the present embodiment, ground loading capacity threshold can be true according to the deadweight of the crane of lifting steel lid beam and the deadweight of steel lid beam
Fixed, used as an alternative embodiment, ground loading capacity threshold is set to 250kPa.
In the present embodiment, used as an alternative embodiment, carrying out place cure process to base of constructing includes：
A11, lifting operation region of the planning comprising loop wheel machine walking position region and Hoisting Position region；
A12, removes the loose table soil in the lifting operation region, backfills gravelly soil, and placement in layers is simultaneously compacted, and per layer is filled
Thickness fills top surface beyond pinner face Second Threshold less than first threshold；
In the present embodiment, as an alternative embodiment, first threshold is 0.3m, and Second Threshold is 20cm.
A13, in the base surface top layer in the lifting operation region, using fine stone leveling, fine stone thickness 5cm,
And top surface requires that levelness cannot be greater than 0.3.；
In the present embodiment, it is considered to loop wheel machine (crane) walking position region and Hoisting Position region, for guaranteeing safety, to lifting
Strengthen changing filling out process in operating area.Specially：First, loose table soil, the particularly mud of drilled pile construction are removed using excavator
Stock tank must be cleaned out (using delaying, slag is backfilling and compacted), backfill gravelly soil, and placement in layers is simultaneously compacted using road roller, per
Layer filling-up thickness fills top surface beyond pinner face 20cm less than 0.3m.Having filled per layer of roadbed carries out ground coefficient K30 inspection
Survey.Loop wheel machine walking and lifting position base surface top layer adopt fine stone leveling, thickness 5cm, and top surface to require levelness not
0.3 must be more than., foundation bearing capacity after process is not less than 250kPa and 150kPa respectively according to the difference of applying working condition.Lifting
During operation, crane crawler belt lower berth base board.
A14, near transom pier, goes out the assembled basis area of polylith steel lid beam using the cast-in-place concreting containing embedded iron
Domain, to prevent construction base local sedimentation during steel lid beam field joint from causing the linear change of steel lid beam, the construction base to include：
Lifting operation region and steel lid beam assembly base area.
In the present embodiment, steel lid beam assembly base area specification is：2 meters × 4 meters, in monolithic steel lid beam assembly base area
Some containing embedded iron, can effective lifting construction base hardenability, the sedimentation phenomenon of the base appearance that prevents from constructing.
Step 102, carries out preprocessing to steel lid beam, the steel lid beam of preprocessing is transported to the construction base of cure process；
In the present embodiment, main load-carrying member of the steel lid beam for transom pier.By carrying out preprocessing, Ke Yiyou to steel lid beam
Effect shortens the time needed for cylinder Coping Construction, lifting construction efficiency；It is also possible to the construction base space needed for reducing.
In the present embodiment, used as an alternative embodiment, carrying out preprocessing to steel lid beam includes：
According to the sections partition strategy for pre-setting, segmented manufacture is carried out to steel lid beam；
During segmented steel lid beam is manufactured, according to the Quality Control Strategy for pre-setting, in segmented steel
Qualifying point is respectively provided with bent cap.
In the present embodiment, for transom pier steel lid beam, three sections can be divided into and manufactured respectively, be followed successively by first segment,
Second section and the 3rd sections.In the present embodiment, the steel lid beam gross weight 150T to 190T of three sections compositions.
As an alternative embodiment, can be according to the characteristics of steel lid beam, according to the Quality Control Strategy for pre-setting
The requirement of (technological document), in steel lid beam manufacture process, is respectively provided with following qualifying point on segmented steel lid beam：
Steel plate flatness qualifying point, in order to control steel plain degree；
Numerical control cutting qualifying point, in order to control physical dimension after steel plate cutting；
Polishing holds out against position processing quality control point, in order to control to hold out against the roughness of machined surface and vertical with plate face
Degree；
Assembling quality control point, in order to control the geometric accuracy for assembling；
Welding quality control point, in order to control welding quality；
Coating quality control point, in order to control coating quality.
Step 103, carries out on-site consolidation to the steel lid beam of preprocessing；
In the present embodiment, used as an alternative embodiment, carrying out on-site consolidation to the steel lid beam of preprocessing includes：
A21, builds platform for lining in the assembled base area, in the first segment of the corresponding steel lid beam of platform for lining
Below the 3rd sections, bearing beam is done using 2 blocks, do bearing beam using 4 blocks below second section, on block,
Lower section adopts steel plate pad；
In the present embodiment, before steel lid beam is transported to building site, on-site consolidation base area is carried out in advance, in assembled base area
Build platform for lining, adopt below A sections and C section bent caps (i.e. the steel lid beam of first segment and the 3rd sections, carry half steel column)
Bearing beam is done with 2 blocks, block size is 800mm × 800mm × 2000mm, the B section steel lid beam (steel lids of second section
Beam) below do bearing beam using 4 blocks, block upper and lower adopts steel plate pad, with flat when ensureing that steel lid beam is assembled
Face degree.Wherein, steel plate thickness δ is 20～50mm, and size is 1000mm × 1000mm.
In the present embodiment, as an alternative embodiment, after the block upper and lower is using steel plate pad, should
Method also includes：
Carry out pinner construction.
In the present embodiment, pinner construction includes：Pinner plan-position is accurately positioned according to steel lid beam center line, is checked, controlled
Height accuracy processed；Install and reinforce and face side security protection, assembling reinforcement, installation form, after acceptance(check), casting concrete.
A22, by on-site consolidation order, is unloaded each segmented steel lid beam to corresponding assembled position using 150t truck cranes,
After lifting is in place, application after carrying out Site Welding, is carried out again.
In the present embodiment, Site Welding includes following content：
1. beam section top board, base plate, web plate joint welding；
2. web, base plate are embedding mends section welding.
Before welding, docking beam section joint weld situation can be checked.For example, trimming region before welding, must not
There are water, rust, oxide skin, greasy dirt, paint or other debris, it is desirable to which metallic luster is shown in polishing in the range of 50mm around which.In weldering
After connecing, it is desirable to process the polishing fairing of irregular groove, must not have a big raised and depression, head bevel angle, gap size and
Whether the welding discrepancy in elevation meets the requirements.
In the present embodiment, used as an alternative embodiment, each sections welding process flow of steel lid beam includes successively：
Beam section is in place；
Misalignment is adjusted；
Base plate, side web positioning；
Web is welded；
Top, base plate welding；
NDT is detected；
Base plate, web, ribbed stiffener are embedding to mend section welding；
NDT is detected；
Cross welding hole closure.
In the present embodiment, as an alternative embodiment, can be welded using the welding method of building site tack welding.Wherein,
Tack weld can use manual welding or semi-automatic CO2 gas shielded arc weldings tack welding.Tack welding 60～80mm of fusion length, spacing 350
～450mm, tack welding should be away from more than end of welding bead 30mm, and deposited metal thickness is not more than the high half of formal weld seam, beam section it
Between tack welding 500～600mm of length between ring tack welding, spacing 1000mm～1200mm.The erection sequence of alignment code is：Beam
Section should be carried out from bridge axle line to two ends when laterally docking, and web is then from top to bottom carried out.
In the present embodiment, building site weldering is executed by following regulation：
A. cross weld is from bridge axis to both sides symmetrical welding；
B. there is the long weld seam of free end one end, from one end welding, advances to free end；
C. the compensator section to all kinds of connections of putting more energy into, after top board, base plate welding, then should be practiced welding.
The allowance for shrinkage of site girth welding seam should be fully estimated when d. welding, and takes measures to reduce by two sections steel lid beams
Between length variation；Meanwhile, per one beam section of assembly, measure the length of a steel lid beam immediately, between two width box beams
Difference is revised in next beam section, does not make error accumulation.
E. the welding order of beam section interface cross weld should be identical with the assembled order of building site beam section erection.
In the present embodiment, the precision that building site is welded is controlled according to following measures：
Strictly control its top surface absolute altitude and flatness first when assembled stand is assembled, before the welding of crossbeam sections, adopt level
Instrument carries out absolute altitude control, overall structure size is strictly checked and accepted after the completion of sections is pre-splicing, and it is fixed to carry out after acceptance(check)
Position welding.
In the present embodiment, after steel lid beam completes welding on steel lid beam platform for lining, the method also includes：
Crank detection test is carried out to weld seam and X-ray shoots, to guarantee that weldquality is qualified.
Step 104, the assembled steel lid beam of the pier shaft lifting based on construction.
In the present embodiment, in pier construction, pre-embedded bolt and positive stop, as shown in Fig. 2 Fig. 2 is the present embodiment pier
The schematic diagram of pre-embedded bolt and positive stop in body construction.Above the pre-embedded steel slab of both sides, 10 blocks are welded altogether, block is high
15cm, wide 10cm, side 6, opposite side 4.
In the present embodiment, obtain the lifting of field grand bridge transom pier steel lid beam and amount to 7 Pin, single Pin steel lids beam be divided into a bent cap and
Two steel columns, near-end steel column (single most weigh about 17.2 tons) are installed using 150 tons of truck cranes in advance, and distal end steel column is (single
17.2 ton are most weighed about) using 650 tons of crawler cranes, main points carry out track blockade installation according to plan in advance, adopt with concrete column at pier top
It is connected with.Wherein,
Steel column (steel column) is installed to be included：Pre-buried flange location and installation and steel column location and installation, as shown in figure 3, Fig. 3
Pre-buried flange location and installation steel column schematic diagram is adopted for the present embodiment.Including：
1. finding measurement dominating pair of vertices total powerstation carries out debugging, checks, it is ensured that precision is in franchise 2～6mm scopes.
2. right pier flange installation center position (O points) elevation, mileage (franchise 10mm) are found using total powerstation and make horizontal stroke,
Longitudinal axis (franchise 5mm).
3. (sample punching in thickness of slab direction is made to make two center lines of ab, cd in pre-buried flanged plate length and width direction (anchor hole) is divided to
Permanent marks) franchise ± 0.5mm.
4. with O points as reference for installation, ab center lines contraposition longitudinal axis, cd center lines align axis of pitch ± 0.5mm to flanged plate,
It is accurately positioned adjustment transverse and longitudinal axial direction ± 0.5mm, elevation ± 5mm, flatness 2mm/m2.
5. flanged plate is integrally formed by being welded and fixed with pier stud steel reinforcement cage.
6. flanged plate upper surface can separately be added two 20 channel-section steels or work steel temporary weld and rigidly be consolidated with steel reinforcement cage outer steel formwork
Fixed, it is ensured that when pier shaft is poured, flanged plate positioning is unaffected.
7., after pier shaft is poured and finished, repetition measurement, check and carry out data record.
Fig. 4 is the present embodiment steel column location and installation schematic diagram.As shown in figure 4, including：
1. every installation of steel columns front distance upper port 200mm position is made measurement line and (can complete sample punching during factory's manufacture
Make permanent marks) and sign midpoint (a ', b ', c ', d ') respectively.
2. single installation of steel columns (such as column 1), with the pre-buried flange horizontal stroke of pier stud, longitudinal axis (ab, cd) as reference for installation essence
Certainly position (franchise ± 1.5mm).
On the basis of using measurement line at steel column upper port, measurement, check installation of steel columns elevation (franchise 10mm)；
With transit survey, steel column axis (aa ', bb ', cc ', dd ') is checked, perpendicularity (franchise is installed in adjustment
10mm).
It is that column adjustment pad flange is used that column mounting and adjusting can prepare 2～3mm of part thickness, 140mm wide laths in advance.
In the present embodiment, bent cap is installed using 650t crawler cranes, lifts 30 meters of radius, and 60 meters of brachium is being lifted.Tool
Body is as follows：In the case where crawler crane is in place；Connection Current Collector Sleave, confirms that gate-type pier capping beam is placed steadily, Current Collector Sleave is connected to 4
On individual lifting hanger, it is connected using 50 tons of truck cranes；Then, lifted；After measurement confirms that position is accurate, fall
Beam；Remove rigging and unload counterweight；Crawler crane is hooked up, and completes to lift.
In the present embodiment, used as an alternative embodiment, while lifting assembled steel lid beam, the method also includes：
Carry out lifting precision controlling.
In the present embodiment, lifting precision controlling includes：Plane control and degree control, wherein,
Plane control：On pre-embedded steel slab, accurate setting-out goes out steel column cross hairs, only need to be directed at cross during hoisting steel beam
Line, is then welded and fixed.Before steel beam lifting, on pier top pre-embedded steel slab, welded limiting is oriented to steel plate simultaneously, it is ensured that steel column is accurate
Really in place；
Degree control：Before the block lifting of steel lid beam, with spirit level to steel column leg after steel lid beam lifting (being highly less than 5m)
Levelling is carried out, and girder steel level is adjusted using assembly pulley, it is ensured that two ends steel column bottom can in level in dropping process for girder steel
Disposably two ends are aligned simultaneously.When steel lid beam stanchion slowly falls, steel column leg steel plate edge is carried out using total powerstation (2)
Squareness measurement, measures steel column leg both sides steel plate side from down to up, and perpendicularity can fix welding after meeting requirement temporarily.
In the present embodiment, after steel lid beam rigging out, the method also includes：
Fill concrete is to pier stud.
In the present embodiment, after steel lid beam rigging out, and by weld detection qualified after tissue steel column in filling C40 without
Shrinkage concrete construction, concrete pump mud jacking by beam body preformed hole and fill in, and match ratio will with specification in strict accordance with design
Preparation is asked, and carries out the monitoring of work progress, it is ensured that construction quality.
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, the change or replacement that can readily occur in all are answered
It is included within the scope of the present invention.Therefore, protection scope of the present invention should be defined by scope of the claims.
Claims (10)
1. a kind of high ferro crosses over the construction method of existing railway large-span steel bent cap, it is characterised in that include：
To constructing, base carries out place cure process；
Preprocessing is carried out to steel lid beam, the steel lid beam of preprocessing is transported to the construction base of cure process；
On-site consolidation is carried out to the steel lid beam of preprocessing；
The steel lid beam of the pier shaft lifting assembly based on construction；
Described pair of construction base carries out place cure process to be included：
Lifting operation region of the planning comprising loop wheel machine walking position region and Hoisting Position region；
The loose table soil in the lifting operation region is removed, gravelly soil is backfilled, placement in layers is simultaneously compacted, and every layer of filling-up thickness does not surpass
First threshold is crossed, and top surface is filled beyond pinner face Second Threshold；
In the base surface top layer in the lifting operation region, using fine stone leveling, fine stone thickness 5cm, and top surface will
Levelness is asked to cannot be greater than 0.3；
Near transom pier, polylith steel lid beam assembly base area is gone out using the cast-in-place concreting containing embedded iron, to prevent
During steel lid beam field joint, the local sedimentation of construction base causes the linear change of steel lid beam, the construction base to include：Lifting operation
Region and steel lid beam assembly base area.
2. method according to claim 1, it is characterised in that described pair of construction base carry out place cure process it
Before, methods described also includes：
The ground loading ability in the construction base is obtained, if the ground loading ability for obtaining is held less than the ground for pre-setting
Loading capability threshold value, executing described pair of construction base carries out place cure process, so that the ground loading ability in the construction base
It is more than the ground loading capacity threshold.
3. method according to claim 1, it is characterised in that described preprocessing is carried out to steel lid beam include：
According to the sections partition strategy for pre-setting, segmented manufacture is carried out to steel lid beam；
During segmented steel lid beam is manufactured, according to the Quality Control Strategy for pre-setting, in segmented steel lid beam
On be respectively provided with qualifying point.
4. method according to claim 3, it is characterised in that the qualifying point includes：Steel plate flatness quality control
Point processed, Numerical control cutting qualifying point, polishing hold out against position processing quality control point, assembling quality control point, welding quality control
System point and coating quality control point.
5. method according to claim 1, it is characterised in that the steel lid beam to preprocessing carries out on-site consolidation bag
Include：
Platform for lining is built in the assembled base area, the corresponding steel lid beam of platform for lining first segment and Section three
Section lower section, does bearing beam using 2 blocks, does bearing beam using 4 blocks below second section, and block upper and lower is adopted
Steel plate pad；
On-site consolidation order is pressed, and each segmented steel lid beam is unloaded to corresponding assembled position using 150t truck cranes, is lifted in place
Afterwards, application is carried out after carrying out Site Welding again.
6. method according to claim 1, it is characterised in that welded using the welding method of building site tack welding.
7. method according to claim 6, it is characterised in that methods described also includes：
Crank detection test is carried out to weld seam and X-ray shoots, to guarantee that weldquality is qualified.
8. method according to claim 1, it is characterised in that while lifting assembled steel lid beam, methods described is also
Including：
Carry out lifting precision controlling.
9. method according to claim 8, it is characterised in that the lifting precision controlling includes：Plane control and hang down
Straight degree control.
10. method according to claim 1, it is characterised in that after steel lid beam rigging out, methods described also includes：
Fill concrete is to pier stud.
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| CN112176865A (en) * | 2020-08-27 | 2021-01-05 | 中铁九局集团第七工程有限公司 | Construction method for splicing and erecting high-speed railway frame pier steel beam in sections |
| CN113265952A (en) * | 2021-05-31 | 2021-08-17 | 中铁建大桥工程局集团第四工程有限公司 | Hoisting method for integral prefabrication of steel cover beam |
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| CN115162173A (en) * | 2022-06-22 | 2022-10-11 | 中铁四局集团有限公司 | Construction method of square steel-concrete combined type portal pier |
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