CN110093859A - A kind of railway prefabricated beam falls girder system system automatically and falls beam construction method - Google Patents
A kind of railway prefabricated beam falls girder system system automatically and falls beam construction method Download PDFInfo
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- CN110093859A CN110093859A CN201910377006.3A CN201910377006A CN110093859A CN 110093859 A CN110093859 A CN 110093859A CN 201910377006 A CN201910377006 A CN 201910377006A CN 110093859 A CN110093859 A CN 110093859A
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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
Girder system system is fallen automatically the present invention relates to a kind of railway prefabricated beam and falls beam construction method, and system includes being arranged on two neighboring bridge pier for accepting precast beam and can realize the jack units to precast beam position adjustment in the horizontal and vertical direction, the displacement sensor for measuring jack units and precast beam position and the control system for controlling jack units movement；The present invention, which has, may be implemented the support unit that horizontal and vertical position is adjusted to precast beam, when falling beam, first precast beam can be placed on Position Approximate, then it is adjusted with exact position of the support unit to precast beam, Adjustment precision is up to 1mm, whole simultaneously to abut precast beam without staff, safety coefficient greatly improves.
Description
Technical field
The present invention relates to bridge construction engineering fields, and in particular to a kind of railway prefabricated beam falls girder system system automatically and falls beam and applies
Work method.
Background technique
Universal answer is obtained in China express railway bridge construction using the railway freely-supported precast beam of fabrication and erection at present
With the construction of bridge location scene pier, the precast beam production method that prefabricated, beam car transports, Bridge Erector is set up by beam field are sufficiently sent out
Shoot the advantage that construction speed is fast, construction quality is high.But the actual size information that pier completion is manufactured with precast beam is not able to achieve
Link up in time, the fulcrum stress of precast beam and linearity monitor are still in blank in erection process, since Bridge Erector indulges bridge to, cross-bridges
To Bit andits control precision it is limited, the various unfavorable factors of work progress cause certain shadow to freely-supported erection of precast beams quality
It rings, the position Luo Liang fulcrum deviation, adjacent beam-ends shape position error cause precast beam unbalance stress, influence thickness of ballast bed, beam-ends waterproof
The installation of facility and other affiliated facilities.
The technological method of erection of current prefabricated railway freely-supported precast beam is all set up using Bridge Erector substantially, precast beam
It is in place to provide plane positioning by Bridge Erector, then precast beam is fallen on the jack on bridge pier as interim transition support, lead to
Cross that interim jack control precast beam elevation direction is in place, control point supporting dynamic balance, then by the bottom surface of permanent support and pier
Gap between top support pinner is closely knit with quickly high-strength grouting material filling, and the supporting force to guarantee permanent each support is flat
Weighing apparatus.
There are three major defects for this technique for falling beam:
1, size and shape position error existing for pier and precast beam cannot be known in advance, and could find after bridge location falls beam, once
The excessive processing difficulty of deviation is big and may influence subsequent construction；
2, plan-position control difficulty is big when falling beam, once falling, beam deviation is excessive to need repetition bale handle to fall beam adjustment；
3, maximum defect is after jack finally unloads, the stress balance situation of final each support do not have it is interpretable according to
According to.
Summary of the invention
The railway prefabricated beam that beam is accurate and safety coefficient is high is fallen technical problem to be solved by the invention is to provide a kind of
Automatically it falls girder system system and falls beam construction method.
The technical scheme adopted by the invention is that:
A kind of railway prefabricated beam falls girder system system automatically comprising is arranged on two neighboring bridge pier for accepting precast beam and can be real
The now jack units to precast beam position adjustment in the horizontal and vertical direction, the position for measuring jack units and precast beam position
Displacement sensor and the control system acted for controlling jack units.
The jack units include at least two active support unit, and the active support unit includes that setting exists
Bottom plate, the counter-force block being arranged on bottom plate and the lateral adjustments module being arranged on counter-force block and longitudinal tune on bridge pier
Module is saved, is fixedly connected with vertical adjustment module in lateral adjustments module and vertical adjustment module.
The lateral adjustments module is the first two-way hydraulic cylinder, and the vertical adjustment module is the second two-way hydraulic cylinder.
The cylinder body of first two-way hydraulic cylinder and the second two-way hydraulic cylinder is fixedly connected with vertical adjustment module, the first two-way liquid
Cylinder pressure and the piston rod at the second two-way hydraulic cylinder cylinder body both ends are slidably connected with counter-force block respectively.
It is provided with sliding slot on counter-force block, the piston rod of first two-way hydraulic cylinder and the second two-way hydraulic cylinder passes through
And the compatible copper sheathing of sliding slot shape is connected with the sliding slot on corresponding counter-force block.
First two-way hydraulic cylinder is two, is separately positioned on the front and rear sides of vertical adjustment module；Described second pair
To hydraulic cylinder position two, it is separately positioned on the left and right sides of vertical adjustment module.
The vertical adjustment module is that vertical jack, cylinder body and lateral adjustments module and vertical adjustment module are solid
Fixed connection.
The top of the jacking piston rod of the vertical jack is provided with spherical crown, the spherical insertion of the spherical crown
On the top of jacking piston rod, the plane of spherical crown with precast beam for being in contact.
The jack units further include driven jack, and the driven jack includes driven unit bottom plate and setting
Driven vertical jack on driven unit bottom plate, the driven vertical jack and driven unit bottom plate slide
Contact.
The control system includes data inputting module, falls beam control module, data uploading module and safety automatically in advance
Alert module.
One kind falling beam construction method, it is characterised in that it includes the following steps:
1) displacement sensor and jack units are installed on pier；
2) precast beam is fallen into beam to displacement sensor range using Bridge Erector, is closed by the position of displacement sensor instruction Dun Liang
System, stopping Bridge Erector falling beam in the range of precast beam drops down onto beam bottom designed elevation or more setting；
3) start jack units, contact jack units with beam bottom, the synchronous jack-up of precast beam is complete to Bridge Erector sunpender
It unloads, in the process the vertical applied force situation of real-time monitoring jack units, and horizontal by displacement sensor beam bottom
State automatically controls and adjusts vertical jack and driven vertical jack and make its balance that is pressurized, and releases sunpender and pre-
The connection of beam processed；
4) synchronizing moving, which adjusts vertical jack and driven vertical jack, makes the beam bottom of precast beam be moved to design
Elevation；
5) the mobile precast beam of starting vertical adjustment module is longitudinally in place；
6) the mobile precast beam of starting lateral adjustments module is laterally in place；
7) jack units are locked, are in the milk to the gap between bearing pad stone and base-plate, when grouting material intensity reaches design
After it is required that, jack units are uniformly unloaded, and completion falls beam work.
The positive effect of the present invention are as follows: the present invention, which has, may be implemented the support that horizontal and vertical position is adjusted to precast beam
Precast beam can be first placed on Position Approximate by unit when falling beam, then with support unit to the exact position of precast beam into
Row is adjusted, and Adjustment precision is up to 1mm, while whole process abuts precast beam without staff, and safety coefficient greatly improves.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention；
Fig. 2 is active support unit structural schematic diagram of the present invention；
Fig. 3 is the driven support unit structural schematic diagram of the present invention；
Fig. 4 is vertical adjustment modular structure schematic diagram of the present invention.
Specific embodiment
As shown in attached drawing 1-4, it includes being arranged in two neighboring bridge pier 11 that railway prefabricated beam of the invention falls girder system system automatically
On for accept precast beam 10 and can realize to precast beam in the horizontal and vertical direction position adjustment jack units, for measure thousand
Jin pushes up the displacement sensor of unit and precast beam position and the control system for controlling jack units movement.Displacement sensing
Device preferably uses three-coordinate sensor, and the side of jack units is arranged in range sensor, for measuring jack units
Regulated quantity needed for elevation and precast beam.Range sensor is existing mature technology, and field personnel can be according to the actual situation
The position for arranging range sensor, need to only realize the measurement of above-mentioned function, belong to those skilled in the art
Common knowledge, details are not described herein again.
Jack units include at least two active support unit, and jack units can all active support lists
Member can also be made of active support unit and driven support unit, and the sum of active support unit and driven support unit is four
A, correspondence is arranged on two neighboring bridge pier 11, and two are arranged on each bridge pier 11, when active support unit is two,
Two active support units are arranged along the length direction of precast beam.The active support unit includes the bottom being arranged on bridge pier 11
Plate 8, the counter-force block 7 being arranged on bottom plate 8 and the lateral adjustments module being arranged on counter-force block 7 and vertical adjustment mould
Block is fixedly connected with vertical adjustment module in lateral adjustments module and vertical adjustment module.Driven jack includes driven list
First bottom plate 13 and the driven vertical jack 14 being arranged on driven unit bottom plate 13, it is described it is driven vertically jack it is very heavy
Top 14 and 13 sliding contact of driven unit bottom plate.
Lateral adjustments module is the first two-way hydraulic cylinder 6, and vertical adjustment module is the second two-way hydraulic cylinder 4, vertical adjustment
Module is vertical jack 3, and cylinder body is fixedly connected with the first two-way hydraulic cylinder 6 and the second two-way hydraulic cylinder 4；First pair
It is slidably connected respectively with counter-force block 7 to the piston rod at 4 cylinder body both ends of hydraulic cylinder 6 and the second two-way hydraulic cylinder.With first pair
Sliding slot 9 along longitudinal direction is provided on the corresponding counter-force block 7 of hydraulic cylinder 6, corresponding with the second two-way hydraulic cylinder 4 anti-
It is provided with sliding slot 9 transversely on power block 7, the piston rod of first two-way hydraulic cylinder 6 and the second two-way hydraulic cylinder 4 passes through
And the compatible copper sheathing of 9 shape of sliding slot is connected with the sliding slot 9 on corresponding counter-force block 7.The work of first two-way hydraulic cylinder 6
When, the second two-way hydraulic cylinder 4 slides in corresponding sliding slot 9, when the work of the second two-way hydraulic cylinder 4, the first two-way hydraulic cylinder 6
It is slided in corresponding sliding slot 9.
First two-way hydraulic cylinder 6 and the second two-way hydraulic cylinder 4 can be set to one or two, L-shaped can arrange,
C-shaped arrangement or groined type arrangement.It is vertical to jack when the first two-way hydraulic cylinder 6 and the second 4 L-shaped arrangement of two-way hydraulic cylinder
The horizontal and vertical movement of jack 3 is controlled by a two-way hydraulic cylinder.When being arranged in C font, i.e. the first two-way hydraulic cylinder 6
For two and the second two-way hydraulic cylinder 4 is one or the first two-way hydraulic cylinder 6 is one and the second two-way hydraulic cylinder 4
It is two.
Preferably, first two-way hydraulic cylinder 6 is two, is separately positioned on the front and rear sides of vertical adjustment module；Institute
The second two-way hydraulic cylinder 4 two is stated, the left and right sides of vertical adjustment module is separately positioned on.Counter-force block 7 is four at this time
It is located on four angles of bottom plate 8, two-way hydraulic cylinder is set between two adjacent counter-force blocks 7.It vertically jacks very heavy
The horizontal and vertical movement on top 3 is adjusted by two hydraulic cylinders.Four two-way hydraulic cylinders are arranged in groined type, so that whole
Structure is highly stable, while lower to the thrust requirements of single two-way hydraulic cylinder, reduces spoilage.
The top of the jacking piston rod 2 of the vertical jack 3 is provided with spherical crown 1, and the spherical of the spherical crown 1 is embedding
Enter on the top of jacking piston rod 2, the plane of spherical crown 1 with precast beam for being in contact.When connecing for jacking piston rod 2 and precast beam
When contacting surface is not parallel, spherical crown 1 can carry out rotation adjustment according to the angle of contact surface, guarantee the contact surface of spherical crown 1 and precast beam
In parallel, supertronic function is realized.
Pressure-bearing wearing plate 5 is provided on the bottom plate 8, the vertical adjustment module is arranged on pressure-bearing wearing plate 5, together
When in the lower section of pressure-bearing wearing plate 5, mirror face stainless steel plate is set, the compressive property of both materials is good and coefficient of friction is low, can be with
Force of sliding friction is effectively reduced, improves whole service life.
The control system includes data inputting module, falls beam control module, data uploading module and safety automatically in advance
Alert module.Data inputting module for realizing parameter typing, such as the typing of science of bridge building information correlation, the position set a roof beam in place and number
And fall the typing of key parameter during beam.Automatically fall beam control module for fall beam movement control, utilize simultaneously
Automatically it falls beam control module and realizes data analysis, the display of real time data, data uploading module will be counted according to backstage Platform Requirements
According to uploading to different engineering platforms.Safe early warning module is alarmed when other failures are transfinited or occurred in the position Luo Liang, from
It is dynamic to fall beam control module and lock jack units.Meanwhile the present invention can also realize automatic and manually-operated handoff functionality.
Force snesor is additionally provided in jack units, for detecting the vertical applied force situation of jack units.
The present invention can be supported precast beam in bridge construction process, and three-dimensional adjusts precast beam and bridge pier upper bracket
Between positional relationship, can stablize, accurately realize precast beam and bridge pier upper bracket precise positioning.
The beam construction method that falls of the invention includes the following steps:
1) the completion coordinate at total station survey bridge location pier control point is used；
2) with the total station survey beam body allocation control points of same precision and the completion coordinate of beam body resemblance point；
3) beam body coordinate system is fitted to pier coordinate system and carries out three-dimensional coordinate calculating, simulation is set up, before completing practical set up
Pretreatment；
4) displacement sensor and jack units are installed on pier；
5) precast beam is fallen into beam to displacement sensor range using Bridge Erector, is closed by the position of displacement sensor instruction Dun Liang
System, precast beam drop down onto stopping Bridge Erector in the range (generally 5-20mm) that beam bottom designed elevation or more is set and fall beam；
6) position for adjusting vertical jack 3 makes the position of its center centering beam bottom top beam, which should be in certain model
The position range for enclosing interior fluctuation prevents the position of vertical jack 3 from causing to adjust apart from inadequate situation partially excessively.
Start jack units, contacts jack units with beam bottom, the synchronous jack-up of precast beam is complete to Bridge Erector sunpender
It unloads entirely, in the process the vertical applied force situation of real-time monitoring jack units, and passes through displacement sensor beam bottom water
Level state, automatically controlling the vertical jack 3 of adjustment and driven vertical jack 14 makes its balance (tension metrics that are pressurized
Be no more than average value for the maximum pressure difference of each jack 2%), release the connection of sunpender and precast beam；
7) synchronizing moving adjusts vertical jack 3 and driven vertical jack 14 is moved to the beam bottom of precast beam to set
Count elevation；
8) the mobile precast beam of starting vertical adjustment module is longitudinally in place；
9) laterally in place by end by the end mobile precast beam of starting lateral adjustments module；
10) jack units are locked, are in the milk to the gap between bearing pad stone and base-plate, when grouting material intensity reaches design
After it is required that, jack units are uniformly unloaded, and completion falls beam work.Pass through displacement sensor simultaneously and records uninstall process
Compression deformation；
11) according to the compression deformation difference compared at four fulcrums, assess whether four end reactions meet code requirement.
The present invention is when falling beam, by the relative positional relationship between displacement sensor pier and precast beam, jack
The position of precast beam is adjusted in unit, realizes adjust automatically, can essence understand fall during beam pier and precast beam it
Between relative position deviation, fall beam efficiency and precision greatly improve.And vertical jacking force is up to 3500kN, horizontal thrust
200kN, 0~150mm of vertical displacement, vertical, horizontal displacement is ± 50mm, and corner ± 0.01rad, Adjustment precision has up to 1mm
Effect solves the problems, such as that precast beam is accurately positioned.And by the vertical applied force feelings of each jack of force sensor measuring during falling beam
Condition, and it is corresponding be adjusted, keep the stress between vertical jack 3 and driven vertical jack 14 relatively flat
Weighing apparatus guarantees the stress balance situation of each support after unloading.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
Invention is explained in detail, those skilled in the art should understand that: it still can be to previous embodiment
Documented technical solution is modified or equivalent replacement of some of the technical features；And these are modified or replace
It changes, the spirit and scope for technical solution of the embodiment of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (10)
1. a kind of railway prefabricated beam falls girder system system automatically, it is characterised in that it includes that setting is used on two neighboring bridge pier (11)
It accepts precast beam (10) and can realize the jack units to precast beam position adjustment in the horizontal and vertical direction, for measuring jack
The displacement sensor of unit and precast beam relative position and control system for controlling jack units movement.
2. a kind of railway prefabricated beam according to claim 1 falls girder system system automatically, it is characterised in that the jack units
Including at least two active support unit, the active support unit includes the bottom plate (8) being arranged on bridge pier (11), sets
It sets in the counter-force block (7) on bottom plate (8) and the lateral adjustments module and vertical adjustment mould that are arranged on counter-force block (7)
Block is fixedly connected with vertical adjustment module in lateral adjustments module and vertical adjustment module.
3. a kind of railway prefabricated beam according to claim 2 falls girder system system automatically, it is characterised in that the lateral adjustments mould
Block is the first two-way hydraulic cylinder (6), and the vertical adjustment module is the second two-way hydraulic cylinder (4)；
The cylinder body of first two-way hydraulic cylinder (6) and the second two-way hydraulic cylinder (4) is fixedly connected with vertical adjustment module, and first is two-way
Hydraulic cylinder (6) and the piston rod at the second two-way hydraulic cylinder (4) cylinder body both ends are slidably connected with counter-force block (7) respectively.
4. a kind of railway prefabricated beam according to claim 3 falls girder system system automatically, it is characterised in that on counter-force block (7)
It is provided with sliding slot (9), the piston rod of first two-way hydraulic cylinder (6) and the second two-way hydraulic cylinder (4) is arranged in corresponding cunning
In slot (9).
5. a kind of railway prefabricated beam according to claim 3 falls girder system system automatically, it is characterised in that the first two-way liquid
Cylinder pressure (6) is two, is separately positioned on the front and rear sides of vertical adjustment module；Second two-way hydraulic cylinder (4) position two, point
The left and right sides of vertical adjustment module is not set.
6. a kind of railway prefabricated beam according to claim 2 falls girder system system automatically, it is characterised in that the vertical adjustment mould
Block is vertical jack (3), and cylinder body is fixedly connected with lateral adjustments module and vertical adjustment module, vertically jacks very heavy
Push up (3) and bottom plate (8) sliding contact.
7. a kind of railway prefabricated beam according to claim 6 falls girder system system automatically, it is characterised in that in the vertical jacking
The top of the jacking piston rod (2) of jack (3) is provided with spherical crown (1), and the spherical of the spherical crown (1) is embedded in jacking piston
The top of bar (2) can simultaneously rotate, and the plane of spherical crown (1) with precast beam for being in contact.
8. a kind of railway prefabricated beam according to claim 2 falls girder system system automatically, it is characterised in that the jack units
It further include driven jack, the driven jack includes driven unit bottom plate (13) and is arranged in driven unit bottom plate (13)
On driven vertical jack (14), the driven vertical jack (14) and driven unit bottom plate (13) sliding connects
Touching.
9. a kind of railway prefabricated beam according to claim 1 falls girder system system automatically, it is characterised in that the control system packet
It includes data inputting module, fall beam control module, data uploading module, safe early warning module and for detecting jack list automatically
The load cell of first vertical applied force situation.
10. it is a kind of using the railway prefabricated beam as described in claim any one of 1-9 fall automatically girder system unite fall beam construction method,
It is characterized in that it includes the following steps:
1) displacement sensor and jack units are installed on pier；
2) precast beam is fallen into beam to displacement sensor range using Bridge Erector, is closed by the position of displacement sensor instruction Dun Liang
System, stopping Bridge Erector falling beam in the range of precast beam drops down onto beam bottom designed elevation or more setting；
3) start jack units, contact jack units with beam bottom, the synchronous jack-up of precast beam is complete to Bridge Erector sunpender
It unloads, in the process the vertical applied force situation of real-time monitoring jack units, and horizontal by displacement sensor beam bottom
State, automatically controlling the vertical jack (3) of adjustment and driven vertical jack (14) makes its balance that is pressurized, and releasing is hung
The connection of bar and precast beam；
4) synchronizing moving, which adjusts vertical jack (3) and driven vertical jack (14), keeps the beam bottom of precast beam mobile
To design altitude；
5) the mobile precast beam of starting vertical adjustment module is longitudinally in place；
6) the mobile precast beam of starting lateral adjustments module is laterally in place；
7) jack units are locked, are in the milk to the gap between bearing pad stone and base-plate, when grouting material intensity reaches design
After it is required that, jack units are uniformly unloaded, and completion falls beam work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910377006.3A CN110093859A (en) | 2019-05-07 | 2019-05-07 | A kind of railway prefabricated beam falls girder system system automatically and falls beam construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910377006.3A CN110093859A (en) | 2019-05-07 | 2019-05-07 | A kind of railway prefabricated beam falls girder system system automatically and falls beam construction method |
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| CN110093859A true CN110093859A (en) | 2019-08-06 |
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ID=67447173
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|---|---|---|---|
| CN201910377006.3A Pending CN110093859A (en) | 2019-05-07 | 2019-05-07 | A kind of railway prefabricated beam falls girder system system automatically and falls beam construction method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110304551A (en) * | 2019-08-08 | 2019-10-08 | 陕西理工大学 | Bridge Erector based on machine vision precisely falls beam wireless control system and method |
| CN110424246A (en) * | 2019-08-08 | 2019-11-08 | 中铁二十局集团第一工程有限公司 | A kind of Long span bowstring arch bridge access bridge jack-up system and jack-up construction method |
| CN112211102A (en) * | 2020-09-29 | 2021-01-12 | 上海城建市政工程（集团）有限公司 | A guidance system for installation of prefabricated bent cap |
| CN112227210A (en) * | 2020-09-29 | 2021-01-15 | 上海城建市政工程（集团）有限公司 | Construction method for erecting prefabricated capping beam |
| CN112681147A (en) * | 2020-12-23 | 2021-04-20 | 蒋友富 | Box girder end structure convenient for pier mounting and pier mounting method |
| CN112813834A (en) * | 2020-12-31 | 2021-05-18 | 中铁八局集团昆明铁路建设有限公司 | Beam piece mounting system and mounting method |
| CN113235435A (en) * | 2021-04-20 | 2021-08-10 | 中交二航局第二工程有限公司 | Cable-first beam-second self-anchored suspension bridge system conversion construction method |
| CN110904820B (en) * | 2019-11-28 | 2021-08-24 | 中铁大桥勘测设计院集团有限公司 | Horizontal restraint system of separated pier support |
| CN114753259A (en) * | 2022-04-28 | 2022-07-15 | 中铁七局集团有限公司 | Alignment leveling method for precast beam erection construction |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110424246A (en) * | 2019-08-08 | 2019-11-08 | 中铁二十局集团第一工程有限公司 | A kind of Long span bowstring arch bridge access bridge jack-up system and jack-up construction method |
| CN110304551B (en) * | 2019-08-08 | 2024-05-07 | 陕西理工大学 | Machine vision-based bridge girder erection machine accurate girder dropping wireless control system and method |
| CN110304551A (en) * | 2019-08-08 | 2019-10-08 | 陕西理工大学 | Bridge Erector based on machine vision precisely falls beam wireless control system and method |
| CN110904820B (en) * | 2019-11-28 | 2021-08-24 | 中铁大桥勘测设计院集团有限公司 | Horizontal restraint system of separated pier support |
| CN112227210B (en) * | 2020-09-29 | 2022-03-01 | 上海城建市政工程（集团）有限公司 | Construction method for erecting prefabricated capping beam |
| CN112211102B (en) * | 2020-09-29 | 2022-03-01 | 上海城建市政工程（集团）有限公司 | A guidance system for installation of prefabricated bent cap |
| CN112227210A (en) * | 2020-09-29 | 2021-01-15 | 上海城建市政工程（集团）有限公司 | Construction method for erecting prefabricated capping beam |
| CN112211102A (en) * | 2020-09-29 | 2021-01-12 | 上海城建市政工程（集团）有限公司 | A guidance system for installation of prefabricated bent cap |
| CN112681147A (en) * | 2020-12-23 | 2021-04-20 | 蒋友富 | Box girder end structure convenient for pier mounting and pier mounting method |
| CN112681147B (en) * | 2020-12-23 | 2022-10-18 | 蒋友富 | Box girder end structure convenient for pier mounting and pier mounting method |
| CN112813834A (en) * | 2020-12-31 | 2021-05-18 | 中铁八局集团昆明铁路建设有限公司 | Beam piece mounting system and mounting method |
| CN113235435A (en) * | 2021-04-20 | 2021-08-10 | 中交二航局第二工程有限公司 | Cable-first beam-second self-anchored suspension bridge system conversion construction method |
| CN113235435B (en) * | 2021-04-20 | 2022-09-30 | 中交二航局第二工程有限公司 | Cable-first beam-second self-anchored suspension bridge system conversion construction method |
| CN114753259A (en) * | 2022-04-28 | 2022-07-15 | 中铁七局集团有限公司 | Alignment leveling method for precast beam erection construction |
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