CN102787560A - Integrated construction method of support of large cantilevered capping beam and vertical column - Google Patents
Integrated construction method of support of large cantilevered capping beam and vertical column Download PDFInfo
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- CN102787560A CN102787560A CN2012103052032A CN201210305203A CN102787560A CN 102787560 A CN102787560 A CN 102787560A CN 2012103052032 A CN2012103052032 A CN 2012103052032A CN 201210305203 A CN201210305203 A CN 201210305203A CN 102787560 A CN102787560 A CN 102787560A
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Abstract
The invention relates to the field of municipal engineering and aims to provide an integrated construction method of a support of a large cantilevered capping beam and a vertical column. The method sequentially includes a construction preparation stage, a first support set-up stage, a vertical column construction stage, a second support set-up stage, a capping beam construction stage and a support detachment stage. A support used in the vertical column construction stage and a support used in the capping beam construction stage are designed integrally, and steel pipe columns are supporting components for capping beam construction and also are scaffold components for vertical column construction, so that construction materials and labor forces can be effectively saved, and construction progress is accelerated. Further, the integrated construction method of the support of the large cantilevered capping beam and the vertical column can be extendedly applied to construction of concrete structures such as beam slabs with big cantilevers, long span and large size.
Description
Technical field
The present invention relates to field of bridge construction, specifically, is a kind of rack integral construction method of choosing arm bent cap and column greatly in the town road.
Background technology
Along with The development in society and economy, automobile progresses into family, makes sharp increase of public vehicles recoverable amount and the limited contradiction in urban space become increasingly conspicuous, and traffic congestion has become normality, and urban traffic is inevitable to high-altitude or underground development.Intensive at the road surrounding building, under the situation that the street is difficult to again widen, adopt the viaduct can the relief of traffic closeness, improve conevying efficiency.The elevated bridge construction has formed scale in the present domestic large size city, still is difficult to satisfy growing traffic pressure, and elevated bridge has past multilayer, higher direction Development Trend.
The construction of conventional road surface viaduct all is that branch carries out, and promptly carries out setting up of column construction scaffolding earlier, to accomplish the construction of bridge column; After column forms, carry out the construction of the bridge bent cap on the column again, construction at this moment just needs to remove the column construction scaffolding of originally setting up, then is setting up of full framing, is convenient to carry out the bent cap construction on the column.If at this moment carry out the engineering construction of superelevation bridge in the busy relatively city of traffic; Such as certain overhead overpass bridge that the inventor once met, bridge floor overhead peak has 32m, and the column height is many more than 15m; Adopt drilled pile to add the cushion cap basis; Substructure is that high column strengthens the cantilever bent cap, and prefabricated case beam is adopted on top, and the bridge formation frame is established; The two ends of bent cap cantilever had been in both sides ring roads top at that time, the ground level road Construction traffic that will pass through during construction, and traffic can not be interrupted again on the ring road of both sides, and the full framing system that generally adopts in therefore original construction becomes very inapplicable; And the scheme of establishing built-in fitting on the column exists the hidden danger of column appearance and welding security reliability.
To sum up; To how rationally to confirm the construction bracket form,, guarantee column bent cap construction bracket system safety and stability to guarantee that traffic is normally current under the bridge; Accelerate the engineering construction progress, reducing peripheral resident's influence etc. all is to need a difficult problem to be solved in the present similar bridge construction.
Summary of the invention
The objective of the invention is provides a kind of rack integral construction method of choosing arm bent cap and column greatly in order to overcome deficiency of the prior art.
In order to realize the object of the invention, technical scheme of the present invention is:
A kind of rack integral construction method of choosing arm bent cap and column greatly, preface comprises following several stages successively: preparation of construction stage, support are set up phase I, column construction stage, support and are set up second stage, bent cap construction stage and support teardown phase;
The said preparation of construction stage comprises establishment, material lease (buying) and the test of support scheme, the construction on steel pipe column basis;
Said support set up the phase I comprise that the installation of steel pipe column, steel pipe column footing are fixed with steel concrete, between the steel pipe column link that bar is installed, the setting up of column operation platform;
Said support is set up second stage and is comprised that steel pipe column and the installation that is connected construction, Bei Leiliang, the Bei Leiliang of column upward lay channel-section steel or i iron crossbeam, ground is transferred setting up of absolute altitude steel pipe frame and transferred absolute altitude laying with steel pipe frame.
As further improvement of the present invention; In said support teardown phase; Support is removed and is laterally carried out to the centre position by two cantilever end symmetries, vertically carries out from top to bottom, sequentially stripping, Wooden Batten, φ 48 steel pipes, channel-section steel (i iron), Bei Leiliang, steel pipe column etc.
The present invention adopts crude steel tubing strings and typing Bei Leiliang composition sectional shelf-unit system such as diameter 609mm wall thickness 16mm; In the bridge column construction stage; The crude steel tubing string is as the main supporting member of construction scaffolding, and bent cap construction stage steel pipe column and Bei Leiliang combination are as the bent cap construction bracket; In the bent cap construction stage, this sectional shelf-unit system has rationally been utilized Bei Leiliang anti-bending strength and steel pipe column compressive property preferably preferably.The present invention utilizes the basis of suspended deck structure as steel pipe column, and is safe and reliable; Bei Leiliang is placed in the steel pipe column top and effectively connects, and at shellfish thunder back channel-section steel or i iron crossbeam is set, φ 48 steel pipe supports of absolute altitude at the bottom of setting up in order to adjustment structure on the crossbeam; The whole loads of structure construction on power transmission to the shellfish thunder beam longeron, reach cushion cap through the steel pipe buttress with load then again through the power transmission of steel pipe support power transmission to crossbeam, and steel pipe is connected through concrete is fixed with cushion cap.Certain distance is provided with the anchor ear connection on column, and the steel pipe buttress adopts shaped steel to be connected with anchor ear, to strengthen the security and stability of steel pipe column.
Because the present invention carries out incorporate design with the support of column construction stage use and the support of bent cap structure construction stage use; Steel pipe column is the supporting member of bent cap construction; It also is the scaffold member of column construction; Therefore the present invention can effectively practice thrift construction material and labour's use, accelerating construction progress.
Compare prior art, beneficial effect of the present invention is embodied in:
1, the integrated bracket of bent cap and column has sufficiently and reasonably utilized Bei Leiliang anti-bending strength and steel pipe column compressive property preferably preferably.In addition through be provided with steel pipe column bottom fixed with the construction measure such as be connected that increases between steel pipe column and column, effectively reduced the drift of steel pipe column, make this sectional shelf-unit system have higher security and stability.
2, this sectional shelf-unit system characteristics such as distance is big that make full use of that the steel pipe column floor space is few, Bei Leiliang encorbelments; Can reduce effectively that on the one hand ground space is taken, for traffic above-ground is current, Construction Arrangement etc. striven for more place; Can directly utilize the basis of cushion cap on the other hand, the basis needn't be set in addition again as steel pipe column.
3, owing to steel pipe column, Bei Leiliang are standard element, quality of materials is safe and reliable, is easy to inspection, and the mechanization of building operation degree is high, and working procedure is simple and easy, and speed of application is very fast relatively.
The present invention adopts the construction of steel pipe column and shellfish thunder beam sectional shelf-unit system, reaches the construction bracket of choosing the arm bent cap greatly applicable to the higher pier stud of bridge, and initial estimate pier stud height has the high economic advantage when 15m is above.The integrated bracket speed of application is fast, and it is little to take up room, and strutting system is stable, and this worker's method is extensible to apply to big cantilever such as beam slab, stride footpath, concrete structure construction that build is bigger greatly.
Description of drawings
Fig. 1 is the schematic flow sheet of the inventive method;
Fig. 2 is steel pipe column and the shellfish thunder beam sectional shelf-unit system elevation after employing the inventive method;
Fig. 3-Fig. 6 is the precedence diagram of steel pipe column installation;
Fig. 7 is the fixed structure chart of steel pipe column footing;
Fig. 8 is the vertical view of Fig. 7;
Fig. 9 is a steel pipe column and the sketch map that is connected of column;
Figure 10 is the vertical view of Fig. 9.
Among the figure: 1, bent cap; 2, operating platform; 3, φ 48 steel pipe supports; 4,25#A channel-section steel; 5, Bei Leiliang; 6, column; 7, steel pipe column; 8, the 16# channel-section steel links bar between the steel pipe column; 9, the 16# channel-section steel links bar between steel pipe column and the column; 10, steel bar concrete; 11, cushion cap; 12, φ 25 reinforcing bars; 13,12# channel-section steel; 14,16# channel-section steel anchor ear; 15, the 16# channel-section steel links bar.
The specific embodiment
Further specify technical scheme of the present invention through the specific embodiment below.
As shown in Figure 1; The rack integral construction method of choosing arm bent cap and column greatly of the present invention, preface comprises following several stages successively: preparation of construction stage, support are set up phase I, column construction stage, support and are set up second stage, bent cap construction stage and support teardown phase;
One, the preparation of construction stage:
1. support programming
The big cantilever bent cap structure of high column bridge is selected steel pipe column shellfish thunder beam sectional shelf-unit system for use.(GB50009-2001) calculate bent cap structure construction load according to " loading code for design of building structures ", calculate maximum shear, the moment of flexure that shellfish thunder joist support receives, the maximum stress value of steel pipe column according to working load.Bei Leiliang allows maximum stress value 300Mpa, allows maximum shear 245250N, and steel pipe column is allowed maximum stress value 143Mpa.Diameter 609mm wall thickness 16mm steel pipe column is steel pipe column commonly used, and homemade Bei Leiliang is Bei Leiliang commonly used.The support scheme need " dangerous than the large-engineering management method " be expounded through peer review by building matter [2009] No. 87, and rack form is seen steel pipe column and the shellfish thunder beam sectional shelf-unit system elevation of Fig. 2.
2. material lease (buying) and test
φ 609 steel pipes, homemade Bei Leiliang are approved product, select lease or buying according to actual needs.Mechanical property test is carried out in sampling to materials such as φ 609 steel pipes of marching into the arena, φ 48 steel pipes, 16# channel-section steel, Bei Leiliang, carries out outward appearance and size simultaneously totally and checks and accepts.The material that does not meet standard or designing requirement is forbidden to use on support.
3. steel pipe column foundation construction
In the steel pipe support programming stage, first-selected steel pipe column stands on the cushion cap, lays when requiring as can not satisfy steel pipe column because of dimension of platform is little, needs be provided with separately in addition reinforced concrete foundation.With φ 609 steel pipes, wall thickness 16mm is an example, and every joint steel pipe column top, bottom are provided with solid flange, and support is calculated as pressure of foundation when reaching allowable bearing 143Mpa by steel pipe:
Steel pipe axis of a cylinder power F=σ
1A
1=143 * π * (609 * 609-577 * 577) ÷ 4=4260301.76N
σ
1: steel pipe column stress, A
1: the steel pipe column sectional area,
Pressure σ is born on the basis
2=F/A
2=4260301.76 ÷ (π 609 * 609 ÷ 4)=14.6MPa.
σ
2: basic compression chord, A
2: the flange area,
According to result of calculation, the requirement on steel pipe column basis can be satisfied in C30 cushion cap or C30 steel reinforced concrete basis.The steel reinforced concrete key dimension is confirmed according to steel pipe column size and soil matrix bearing capacity.
Two, phase I rack construction
1. steel pipe column is installed
Steel pipe column adopts segmentation to install, and steel pipe column commonly used has all size such as 9 meters, 6 meters, 4 meters, 3 meters, 2 meters, 1 meter, selects the steel pipe length combination for use according to the column height, and the steel pipe two ends are provided with flange, adopt bolt to connect between two sections steel pipes.
The erection sequence of steel pipe column 7 is seen the steel pipe column installation precedence diagram of Fig. 3-Fig. 6; Steel pipe column connect high and the installation that links bar, operate on the ladder truck of cranking arm by the constructor.
First step (see figure 3): with two steel pipe columns 7 is the unit, links the connection of bar up and down on ground; Linking bar is the 16# channel-section steel.
Second the step (see figure 4): with loop wheel machine with steel pipe column 7 vertically on cushion cap 11.
The 3rd step (see figure 5): the workman connects remaining channel-section steel and links bar on the ladder truck of cranking arm, constitute framework.
The 4th step: the workman carries out the height that connects of steel pipe column 7 on the ladder truck of cranking arm.
2. the steel pipe column footing is fixed with steel concrete
Behind steel pipe column 7 installation in position,, steel pipe column 7 footing are fixed for improving the load-carrying properties of steel pipe column 7.The fixing reinforced concrete structure that adopts of footing, reinforcing bar is made up of φ 25 reinforcing bars 12 that the basis is reserved and place the back, and steel bar concrete 10 is built after constituting the spider structure by 4 12# channel-section steels, and fixed back forms and is of a size of 1 meter length and width, and 0.3 meter is high.
3. linking bar between the steel pipe column installs
Residue between the steel pipe column 7 is linked bar install,, link bar and adopt bolt to be connected with steel pipe column 7 by 1.7 meters one settings of spacing.Linking bar can be used as the column construction operation platform in the column construction stage and sets up.Link bar and adopt the loop wheel machine lifting to put in place, installation personnel stands on the ladder truck of cranking arm and installs.
4. the column construction operation platform is set up
For guaranteeing column reinforcing bar, template construction operation, must be at each height and position setting operation platform of steel pipe column.Utilize the channel-section steel between the steel pipe to link bar, link two and arrange steel pipe on the bar, steel pipe with link bar and block with fastener, on steel pipe, completely spread pin hand sheet then, at operating platform one circle Dense mesh screen need be set simultaneously.
Three, bridge column construction
The bridge column construction stage, utilize the channel-section steel tie rod of support, arrange steel pipe, pin hand sheet, as the pillar construction construction operation platform, personnel carry out reinforcing bar, template construction on operating platform.The column construction need pay special attention to control concreting speed, and is stable to guarantee model of the column.The bridge column also is the important base that the bent cap support is reinforced, and does not set forth in detail in this worker's method of concrete structure job practices.
Four, second stage rack construction
1. steel pipe column is connected construction with column
According to the link position that requires to arrange steel pipe column 7 and column 6 in the support scheme, this connection is in order to reduce the calculated length of steel pipe column 7, to improve the steel pipe column stress performance.Generally less than 10 meters 16# channel-section steel anchor ear 14 is set one, and top of the trellis, bottom must be provided with by spacing; Connect the 16# channel-section steel again and link bar 15, type of attachment is seen Fig. 9 and Figure 10.Wherein the steel pipe buttress connects with column and is not more than 10m by spacing and is provided with, and laterally connection is corresponding with the steel pipe buttress for link position; Column anchor ear, steel pipe buttress are connected with column and are the 16# channel-section steel.
2. Bei Leiliang installs
Bei Leiliang adopts the loop wheel machine lifting, and three artificial cooperations lay.Hawser of each bolt at the Bei Leiliang two ends, every by people pulling, in the Bei Leiliang lifting process; Artificial stay cord is to control its shellfish thunder beam direction; When Bei Leiliang winched to the steel pipe column top, the workman on the operating platform of top commanded loop wheel machine, slowly put Bei Leiliang to desired location.
3. crossbeam is installed
At first on Bei Leiliang, carry out the position setting-out of channel-section steel crossbeam according to constructure scheme, utilize loop wheel machine that channel-section steel or i iron crossbeam are pursued the root hoisted in position then, the artificial loop wheel machine that on Bei Leiliang, cooperates is accurately in place with the channel-section steel crossbeam.
4. transfer absolute altitude to set up and install with steel pipe frame
The vertical rod of φ 48 steel pipe supports 3 arranges that by 60 * 60cm step pitch is provided with by being not more than 120cm, and the bar of sweeping the floor, bridging must be set on request.Steel pipe frame is set up at the reserved field on ground on the ground, carries out integral hoisting after setting up completion, is placed on the crossbeam that 25#A channel-section steel 4 or i iron constitute, and all vertical rods must stand on the crossbeam.The inspection adjustment vertical rod of steel pipe frame back in place all contacts with crossbeam, and is stressed to guarantee all vertical rod integral body.
Five, the bent cap construction stage
1. bent cap reinforcing bar, template, concrete construction all rely on its underpart support, structure construction and checking and accepting (CJJ2-2008) according to design drawing and " Urban Bridge engineering construction and inspection of quality standard ", and concrete job practices is elaboration in detail in this worker's method.
2. concrete pouring construction emphasis control
(1) concreting order
According to the characteristic that supporting structure is encorbelmented greatly, concrete pouring construction must be built from middle past both sides symmetry, and is inhomogeneous stressed to reduce support.
(2) real time on-line monitoring
The bent cap support adopts large diameter steel pipe buttress Jia Beilei sheet longeron combined system.Consider that this kind rack form uses less and support height is bigger; For guaranteeing the safe and reliable of strutting system; In line with the principle of careful careful design, conscientious careful installation and real-time synchronous monitoring, arrange foil gauge at the important node position of strutting system, carry out the real-time monitoring of strutting system; With the true stress situation at each position of timely grasp strutting system, for practice of construction provides first hand data.
Suggestion foil gauge position is following:
1., the steel pipe buttress has 4 in the strutting system, is symmetric arrangement, every steel pipe pier is arranged one at least, and chooses that steel pipe buttress is upper and lower respectively arranges a relatively foil gauge, need be provided with 6;
2., on each rod member of shellfish thunder frame directly over the steel pipe buttress position (vertical rod, brace, chord member etc.) arrange foil gauge, 4 of shellfish thunder frame meters are positioned on 4 steel pipe piers, consider the stressed inhomogeneities of shellfish thunder frame, need be provided with 12;
3., arrange foil gauge on the connecting rod between steel pipe buttress and the column anchor ear, to obtain the true stress situation that connects rod member, three positions, upper, middle and lower are provided with respectively, need be provided with 6.
Six, support teardown phase
Support is removed construction.The bent cap structure can be carried out the support dismounting after reaching design strength 100%.Support is removed and laterally to be carried out to the centre position by two cantilever end symmetries, vertically then carries out from top to bottom, orderly release template, Wooden Batten, φ 48 steel pipes, channel-section steel (i iron), Bei Leiliang, steel pipe column etc.At first remove beginning from φ 48 steel pipes, between φ 48 steel pipes and the bed die lumps of wood, be provided with timber wedge, through pounding out timber wedge, loosening steel pipe support carries out support then and removes.Materials such as template, Wooden Batten, steel pipe, channel-section steel unload the backward Bei Leiliang that is placed on and upward hang down with loop wheel machine, and Bei Leiliang, steel pipe column etc. in time unloads with loop wheel machine after successively removing tie element.Safety prevention measure is set around the operating personnel's operation in lower floor's operating platform in the demolishing process, operating platform.
Main material of the present invention and equipment have:
1, support main material
Φ 609 steel pipe columns (or other model crude steel tubing strings), homemade Bei Leiliang, 25# channel-section steel or 22# i iron (according to structural load), Φ 48 steel pipes, 16# channel-section steel (link between the steel pipe column, steel pipe column and column link), pin hand sheet, Dense mesh screen.
2, capital equipment
With single rack construction is example, and its main plant sees the following form:
According to the constructure scheme construction, steel pipe column, Bei Leiliang set up by scheme and carry out an acceptance inspection in work progress in the present invention, transfer absolute altitude (DB33/1035-2006) to check and accept by " building operations fastener type steel pipe falsework tecnical regulations " with steel pipe support.
Bring into use the stage should adopt real time on-line monitoring system that situation such as the ess-strain of sectional shelf-unit system and sedimentation deformation are carried out monitoring; With the security reliability of monitoring integrated bracket system, monitoring strutting system actual loading and distortion etc. meet situation with design-calculated.
Support is set up allowable variation
One, master control project
The steel pipe column, the Bei Leiliang that use of support, link material such as bar and need consistent with scheme;
2. rack form is consistent with the support scheme;
Two, general data
Steel pipe column verticality≤3 ‰ and≤10mm, steel pipe column position deviation≤10mm.
2. shellfish thunder beam position deviation≤10mm.
3. φ 48 steel pipe supports satisfy " building operations fastener type steel pipe falsework tecnical regulations " (DB33/1035-2006).
Carrying out performance analysis in the face of the present invention down, is example with 20 meters high bent cap structures, and bent cap and column integrated bracket and traditional column and bent cap are set up support respectively and compared, as follows:
1, duration benefit
Integrated bracket can be proceeded follow-up support and set up after the column construction is accomplished, last property dismounting, and support is set up and is taken time about 5 days altogether.Conventional column bent cap construction need be removed the column construction scaffolding when bent cap is constructed, carry out the bent cap support then and set up.The column scaffold is taken, is torn open, and the bent cap support is taken, torn open, needs about 10 day time altogether.
2, economic benefit
Integrated system is taken and is torn 4 scaffolders of need and a loop wheel machine open, and the bent cap full framing is set up needs 10 scaffolders, and relatively two kinds of strutting systems are set up and consumed worker's (containing loop wheel machine) appropriate litigation fees every day.The material rental charge of Bei Leiliang and steel pipe support contrast full framing system every day is suitable.Because of the integrated bracket construction period reduces, the corresponding minimizing of lease expenses.Integrated bracket with set up support at twice and saved the expense that the column construction scaffolding is taken, torn open.Steel pipe column and shellfish thunder beam sectional shelf-unit system are little to the below traffic impact in addition, have saved the traffic administration expense, obtain good economic benefit, like following table:
3, social benefit
Full framing needs full hall to arrange that influence basin is big, like the below demand of being open to traffic is arranged, only can be through wicket hole mode is set below bent cap.Under steel pipe column and the shellfish thunder beam sectional shelf-unit system floor space, completely be covered with pin hand sheet, Dense mesh screen on the shellfish thunder beam lower chord, the below can be open to traffic safely.Steel pipe column and the shellfish thunder beam sectional shelf-unit system social benefit of comparing is good.
At last, it is also to be noted that what more than enumerate only is practical implementation example of the present invention.Obviously, the invention is not restricted to above examples of implementation, many distortion can also be arranged.All distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention all should be thought protection scope of the present invention.
Claims (2)
1. rack integral construction method of choosing arm bent cap and column greatly; It is characterized in that preface comprises following several stages successively: preparation of construction stage, support are set up phase I, column construction stage, support and are set up second stage, bent cap construction stage and support teardown phase;
The said preparation of construction stage comprises establishment, material lease (buying) and the test of support scheme, the construction on steel pipe column basis;
Said support set up the phase I comprise that the installation of steel pipe column, steel pipe column footing are fixed with steel concrete, between the steel pipe column link that bar is installed, the setting up of column operation platform;
Said support is set up second stage and is comprised that steel pipe column and the installation that is connected construction, Bei Leiliang, the Bei Leiliang of column upward lay channel-section steel or i iron crossbeam, ground is transferred setting up of absolute altitude steel pipe frame and transferred absolute altitude laying with steel pipe frame.
2. the rack integral construction method of choosing arm bent cap and column greatly according to claim 1; It is characterized in that; In said support teardown phase; Support is removed and is laterally carried out to the centre position by two cantilever end symmetries, vertically carries out from top to bottom, sequentially stripping, Wooden Batten, φ 48 steel pipes, channel-section steel (i iron), Bei Leiliang, steel pipe column etc.
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| CN104878695A (en) * | 2015-05-21 | 2015-09-02 | 上海市政建设有限公司 | Viaduct cover beam shaping bottom die support and application method thereof |
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| CN107653781A (en) * | 2017-09-20 | 2018-02-02 | 龙元建设集团股份有限公司 | Big steel pipe truss and construction method for bent cap cast-in-place construction |
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| CN104878695A (en) * | 2015-05-21 | 2015-09-02 | 上海市政建设有限公司 | Viaduct cover beam shaping bottom die support and application method thereof |
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| CN104963293A (en) * | 2015-07-22 | 2015-10-07 | 中铁十一局集团桥梁有限公司 | Anchoring method for grouting and anchoring reinforcing steel bar in corrugated pipe to anchor precast segmental beam and parking area stiffening strut |
| CN104963293B (en) * | 2015-07-22 | 2016-05-18 | 中铁十一局集团桥梁有限公司 | Prefabricated subsection beam lay-by is put more energy into and is supportted bellows slurry anchor Bar Anchorage method |
| CN107653781A (en) * | 2017-09-20 | 2018-02-02 | 龙元建设集团股份有限公司 | Big steel pipe truss and construction method for bent cap cast-in-place construction |
| WO2020103351A1 (en) * | 2018-11-21 | 2020-05-28 | 中铁十八局集团有限公司 | Bailey support system applied to crossed protection of complicated pipe cable and construction method therefor |
| US11473262B2 (en) | 2018-11-21 | 2022-10-18 | China Railway 18 Bureau Group Co., Ltd. | Bailey support system applied to cross protection of complex pipes and cables and construction method thereof |
| CN110184926A (en) * | 2019-05-14 | 2019-08-30 | 宁波市政工程建设集团股份有限公司 | A kind of public affairs rail is built together the overhead pier stud construction method of double-layer integrallyization |
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| CN110184927A (en) * | 2019-05-14 | 2019-08-30 | 宁波市政工程建设集团股份有限公司 | A kind of Y type pier stud construction method using Bailey bracket |
| CN110804948A (en) * | 2019-10-31 | 2020-02-18 | 安徽省路港工程有限责任公司 | Construction method of steel pipe pile bailey truss foundation full-space bracket system |
| CN110804948B (en) * | 2019-10-31 | 2021-05-11 | 安徽省路港工程有限责任公司 | Construction method of steel pipe pile bailey truss foundation full-space bracket system |
| CN113235448A (en) * | 2021-05-31 | 2021-08-10 | 中铁四局集团第四工程有限公司 | Installation method of main line crossing ultrahigh steel pipe column system |
| CN113235448B (en) * | 2021-05-31 | 2022-06-21 | 中铁四局集团第四工程有限公司 | Installation method of main line crossing ultrahigh steel pipe column system |
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