CN109024306A - Mountain terrain place Gao Dun rides pier formula door frame bridge lifting construction method - Google Patents
Mountain terrain place Gao Dun rides pier formula door frame bridge lifting construction method Download PDFInfo
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- CN109024306A CN109024306A CN201810856355.9A CN201810856355A CN109024306A CN 109024306 A CN109024306 A CN 109024306A CN 201810856355 A CN201810856355 A CN 201810856355A CN 109024306 A CN109024306 A CN 109024306A
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- door frame
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- left column
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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
- E01D21/06—Methods or apparatus specially adapted for erecting or assembling bridges by translational movement of the bridge or bridge sections
Abstract
The invention discloses mountain terrain place Gao Dun to ride pier formula door frame bridge lifting construction method, comprising the following steps: step A, pier formula bale handle door frame is ridden in installation；Step B, the promotion and subsequent erection of beam slab are carried out by riding pier formula bale handle door frame；The step A the following steps are included: step A1, ride pier formula bale handle door frame upright post basic construction；Step A2, the erection of the left column and right column of pier formula bale handle door frame is ridden；Step A3, crossbeam is set up on column, by riding the direct vertical-lift of pier formula door frame and Bridge Erector being cooperated to set up the method for T beam instead of traditional construction of bridge T beam erection method；Compared to traditional construction of bridge T beam erection method, the present invention has the bridge erection for being suitable for the mountain terrain that topography is precipitous, construction area is narrow, the beneficial effect that construction speed is fast, construction period is shorter.
Description
Technical field
The invention belongs to bridge erection technical fields, and in particular to mountain terrain place Gao Dun rides the promotion of pier formula door frame bridge
Construction method.
Background technique
In order to guarantee the balanced growth of regional economy, while also reinforcing the connection of each region, Highway Project now
A wide range of, high speed development is obtained, the bridge construction in highway engineering construction is always in entire highway engineering construction
Emphasis is also difficult point simultaneously.Because of terrain differences, bridge builds technical height, and the usually duration is longer.Especially on mountain
Ridge area, because the construction factor that topography is precipitous, construction space is narrow, causes directly to transport roof beam structure beam in traditional bridge erection engineering
Method is difficult to implement, and especially bridge is larger, when requiring to the construction period, and traditional fortune roof beam structure beam method obviously cannot
Large-scale Hoisting equipment narrow suitable for mountain terrain topography, related is difficult to the condition installed, therefore, for the bridge of mountain terrain
The problem of erection, the invention discloses mountain terrain place Gao Dun to ride pier formula door frame bridge lifting construction method.
Summary of the invention
The purpose of the present invention is to provide mountain terrain place Gao Dun to ride pier formula door frame bridge lifting construction method, using riding
The elevator that pier formula door frame carries out T beam is set up, and has the effect of that adaptation mountain terrain topography is narrow, the construction period is shorter.
The present invention is achieved through the following technical solutions:
This method the following steps are included:
Step A, pier formula bale handle door frame is ridden in installation；
Step B, the promotion and erection of beam slab；
The step A the following steps are included:
Step A1, the upright post basic construction of pier formula bale handle door frame is ridden；
Step A2, the erection of the left column and right column of pier formula bale handle door frame is ridden；
Step A3, crossbeam is set up on column.
The column includes the left column for being set up in ground and the right column being set up on pier cap beam, the step A1 packet
Include following steps: in the left side of two neighboring bridge pier simultaneously according to pile foundation pore-forming, the sequence of framework of steel reinforcement construction, concreting
The construction on left column basis is carried out, the Pile Diameter on the left column basis is 2.1m；
The step A2 the following steps are included: on the basis of left column pre-buried steel construction firmware, welded on the steel construction firmware
Steel construction pallet is connect, left column truss is set up on the steel construction pallet, after the completion of left column erection of truss, in left column purlin
The armored concrete of diameter 2m is poured within the scope of the 5-6m of frame lower part；The pre-buried steel construction firmware on pier cap beam, in the steel knot
Right column truss is set up on fixed piece；
The step A3 the following steps are included: between left column and right column merogenesis assemble crossbeam, as soon as every assembling section crossbeam,
Support frame is arranged on bent cap to be supported crossbeam, until crossbeam is completed.
This method uses sets up left column in the left side of two adjacent bridge piers in advance, sets up on the bent cap of bridge pier right vertical
Column, between left column and right column set up crossbeam mode, construction ride pier formula door frame, then on crossbeam install lifting station and
Overhead traveling crane, and the T beam for being located at ground is directly promoted to by pier coping portion by lifting station and overhead traveling crane cooperation, then carry out the frame of T beam
If.Compared to traditional method directly transported or promote T beam, this method, which has, to be adapted to narrow construction space, saves the duration
Effect.
In order to which the present invention is better achieved, further, before the left column foundation construction, left column should be measured in advance
The clear distance on basis and bridge pier, the clear distance should be greater than the space width needed for T beam is promoted.
In order to which the present invention is better achieved, further, after the completion of the left column erection of truss in the step A2, on a left side
High-tensile steel wires cable wind rope of several diameters more than or equal to 5cm is arranged on column truss to connect left column truss with bridge pier.
Most of load because the height of left column truss is higher, and when left column truss assumes responsibility for being promoted T beam, because
This left column truss must keep stable, in order to avoid stress of the left column truss in wind-force or promotion T beam causes to shake, because
This had been provided with the high-tensile steel wires cable wind rope of several diameters more than or equal to 5cm by left column truss and both on left column truss
Some bridge pier connections, make left column truss keep stablizing by existing bridge pier.
In order to which the present invention is better achieved, further, the step B the following steps are included:
Step B1, lifting station system is installed on the crossbeam, the lifting station system includes fixed lifting station and transverse shifting
Overhead traveling crane；
Step B2, passed through after T beam is promoted to the predetermined altitude of pier coping portion using the promotion that fixed lifting station carries out T beam
Overhead traveling crane is fixed T beam is traversing to transporting on beam on beam trolley；
Step B3, beam trolley will be transported on T beam and beam to reinforce, then carry out fortune beam operation using fortune beam trolley on beam；
Step B4, the erection of T beam is carried out.
It, further, should be in advance on a left side when carrying out the promotion of T beam in the step B2 in order to which the present invention is better achieved
Observation point is arranged in the midpoint of one angle point of the top surface of column and crossbeam, observe in T beam lifting process the displacement of bale handle door frame and
Settling amount variation, observation method are as follows:
(1), the original coordinates of measuring and calculating and hourly observation point；
(2), T beam is promoted to the top of the concrete parts of left column, is paused 10 minutes, is calculated the new coordinate of observation point and count
Calculate the displacement of bale handle door frame；
(3), continue T beam promoting 6m, pause 10 minutes, calculate the new coordinate of observation point three times and calculate the displacement of bale handle door frame
Amount records three groups of data；
(4), continue T beam promoting 3m, pause 10 minutes, calculate the new coordinate of observation point twice and calculate the displacement of bale handle door frame
Amount records two groups of data；
(5), continue T beam promoting 2m, pause 5 minutes, calculate the new coordinate of observation point three times and calculate the displacement of bale handle door frame
Amount records three groups of data；
(6), continue for T beam to be promoted to pier coping portion predetermined altitude, pause 5 minutes, calculate the new coordinate of six observation points and count
The displacement and settling amount of bale handle door frame are calculated, six groups of data are recorded；
Once the displacement and settling amount of the bale handle door frame observed in T beam lifting process are abnormal, T beam should be stopped immediately
Promote simultaneously hidden trouble inspection.
In order to which the present invention is better achieved, further, the step B4 the following steps are included:
Step B4.1, the component of Bridge Erector is promoted to Liang Mianshang using lifting station, and the bridge floor platform between bridge pier is enterprising
Row Bridge Erector is assembled and the installation of beam face fortune beam orbit, after the completion of Bridge Erector is assembled, carries out Bridge Erector and successively carries out zero load and again
Examination is carried to hang；
Step B4.2, the tail drop in beam counterweight of Bridge Erector is carried out in advance, and the fore-stock for the Bridge Erector that then comes to nothing simultaneously carries out Bridge Erector
Hitch frame complete machine move ahead, until Bridge Erector is set a roof beam in place state in hanging beam；
Step B4.3, the T beam on ground is promoted on bridge pier beam face and is placed on the fortune beam trolley of bridge floor by lifting station, fortune
The erection point that T beam is transported to Bridge Erector by beam trolley is in place；
Step B4.4, fortune beam trolley transport T beam enter bridge formation ventral lane predetermined position it is in place, Bridge Erector carries out hanging beam and sets a roof beam in place work
Industry；
Step B4.5, it after the completion of setting a roof beam in place, carries out the via hole of Bridge Erector, after the completion of via hole, carries out the circulation of step B3.1 to B3.4
Operation.
In order to which the present invention is better achieved, further, before the fortune beam trolley in the step B3 carries out fortune beam operation,
The sundries on fortune beam route should be cleared up in advance, check whether the laying of the sleeper or steel plate at expansion joint is smooth；In fortune beam trolley
It when carrying out fortune beam operation, is observed at the both ends of fortune beam trolley, it is ensured that the travelling route of fortune beam trolley is the centre bit of beam rib
It sets.
Compared with prior art, the present invention have the following advantages that and the utility model has the advantages that
(1) of the invention by setting up right column and left column respectively on the ground of the bent cap of existing bridge pier and bridge pier side, and
Crossbeam is set up between right column and left column, on crossbeam set up lifting station system, under bridge pier ground it is directly vertical
The mode for promoting T beam carries out bridge erection, and compared to traditional construction of bridge T beam erection method, the present invention, which has, is more applicable for ground
The bridge erection for the mountain terrain that shape is precipitous, construction area is narrow, directly promotion T beam, construction speed is fast, construction period is shorter
Beneficial effect.
Detailed description of the invention
Fig. 1 is flow chart of the invention.
Specific embodiment
Embodiment 1:
Mountain terrain place Gao Dun rides pier formula door frame bridge lifting construction method, as shown in Figure 1, comprising the following steps:
Step A, pier formula bale handle door frame is ridden in installation；
Step B, the promotion and erection of beam slab；
The step A the following steps are included:
Step A1, the left column foundation construction of pier formula bale handle door frame is ridden；
Step A2, the erection of the left and right column of pier formula bale handle door frame is ridden；
Step A3, crossbeam is set up on left and right column.
The column includes the left column for being set up in ground and the right column being set up on pier cap beam, the step A1 packet
It includes following steps: being poured simultaneously according to pile foundation pore-forming, framework of steel reinforcement construction, concrete on the ground in the left side of two neighboring bridge pier
The sequence built carries out the construction on left column basis, and the Pile Diameter on the left column basis is 2.1m；
The step A2 the following steps are included: on the basis of left column pre-buried steel construction firmware, welded on the steel construction firmware
Steel construction pallet is connect, left column truss is set up on the steel construction pallet, after the completion of left column erection of truss, in left column purlin
The armored concrete of diameter 2m is poured within the scope of the 5-6m of frame lower part；The pre-buried steel construction firmware on pier cap beam, in the steel knot
Right column truss is set up on fixed piece；The cable wind rope of diameter 5cm is set on left column truss, it will be left using stiffness wirerope
Column truss is connect with bridge pier；
The step A3 the following steps are included: between left column and right column merogenesis assemble crossbeam, as soon as every assembling section crossbeam,
Support frame is arranged on bent cap to be supported crossbeam, until crossbeam is completed.
Before the left column foundation construction, the clear distance of left column basis and bridge pier should be measured in advance, and the clear distance should be big
Space width needed for T beam is promoted.
Since the topography of mountain terrain is precipitous, construction area is narrow, directly transports and mention in traditional bridge erection method
It rises T beam and does not obviously adapt to the very narrow situation of construction area using the method that bridge fabrication machine carries out T erection on bridge pier,
It will cause the equipment conveyings such as loop wheel machine, bridge fabrication machine to be inconvenient, in turn result in duration extremely long problem.Therefore, using riding pier formula
Door frame bridge lifting construction method solves the above problems, and before carrying out the promotion of T beam and setting up work, needs to carry out in advance to ride pier
The erection work of formula door frame, door frame are set to bottom surface left column, two right columns and frame being set on pier cap beam by two
Crossbeam between left column and right column is constituted.Because left column is directly arranged on bottom surface, by different soil spy
Property influence, in order to guarantee the stability and safety of left column, need in advance carry out left column upright post basic construction.Zuo Li
The upright post basic of column uses pile foundation, uses stake diameter for the embedded rock pile of 2.1m, if the rock stratum of pile foundation insertion is weak-weathered rock
Layer, then the depth of pile foundation insertion is not less than 4m.In practice of construction, two left columns are determined according to topography and bridge pier height
Height is respectively 46.5m and 45.3m, and it is the concrete knot of lower part connecting with pile foundation respectively that left column, which consists of two parts,
The steel truss structure of structure and top, the concrete structure of lower part and the steel truss structure on top pass through steel construction firmware and steel construction
Pallet connection, while the stability in order to guarantee entire left column, several diameters are provided on left column truss and are more than or equal to
The high-tensile steel wires cable wind rope of 5cm, and using bridge pier as attached wall pier, left column truss and bridge pier are carried out tightly using cable wind rope
It is close connection and weld it is firm.
Right column is directly set up using the bent cap of bridge pier, in advance the pre-buried steel construction firmware on the bent cap of bridge pier, so
Connection steel truss is set up on steel construction firmware afterwards and forms right column.
After the completion of left column and right column are set up, crossbeam is set up between left column and right column, because of the weight of crossbeam
And span is larger, therefore sets up crossbeam by the way of merogenesis assembling, as soon as every erection section crossbeam, in the crossbeam set up
Section lower section setting steel pipe post or steel construction scaffold are supported crossbeam section, complete until entire crossbeam splices.
Embodiment 2:
The present embodiment advanced optimizes on the basis of embodiment 1, the step B the following steps are included:
Step B1, lifting station system is installed then to carry out trying to hang on the crossbeam, the lifting station system includes fixed promoted
It stands and the overhead traveling crane of transverse shifting；
Step B2, passed through after T beam is promoted to the predetermined altitude of pier coping portion using the promotion that fixed lifting station carries out T beam
Overhead traveling crane is fixed T beam is traversing to transporting on beam on beam trolley；
Step B3, beam trolley will be transported on T beam and beam using jack to reinforce, then carry out fortune beam using fortune beam trolley on beam
Operation；
Step B4, the erection of T beam is carried out.
The lifting station is temporary project, and bracket and the tackling system construction of lifting station finish, and copes with each weld part
Position and structure are checked and are checked.
It, should be in advance in an angle point and crossbeam for the top surface of left column when carrying out the promotion of T beam in the step B2
Point setting observation point observes the displacement of bale handle door frame and settling amount variation, observation method in T beam lifting process are as follows:
(1), the original coordinates of measuring and calculating and hourly observation point；
(2), T beam is promoted to the top of the concrete parts of left column, is paused 10 minutes, is calculated the new coordinate of observation point and count
Calculate the displacement of bale handle door frame；
(3), continue T beam promoting 6m, pause 10 minutes, calculate the new coordinate of observation point three times and calculate the displacement of bale handle door frame
Amount records three groups of data；
(4), continue T beam promoting 3m, pause 10 minutes, calculate the new coordinate of observation point twice and calculate the displacement of bale handle door frame
Amount records two groups of data；
(5), continue T beam promoting 2m, pause 5 minutes, calculate the new coordinate of observation point three times and calculate the displacement of bale handle door frame
Amount records three groups of data；
(6), continue for T beam to be promoted to pier coping portion predetermined altitude, pause 5 minutes, calculate the new coordinate of six observation points and count
The displacement and settling amount of bale handle door frame are calculated, six groups of data are recorded；
Once the displacement and settling amount of the bale handle door frame observed in T beam lifting process are abnormal, T beam should be stopped immediately
Promote simultaneously hidden trouble inspection.
Before fortune beam trolley in the step B3 carries out fortune beam operation, the sundries on fortune beam route, inspection should be cleared up in advance
Whether the laying for looking into the sleeper or steel plate at expansion joint is smooth；When fortune beam trolley carries out fortune beam operation, the two of fortune beam trolley
End is observed, it is ensured that the travelling route of fortune beam trolley is the center of beam rib.
Before carrying out step B1, comprehensive inspection of lifting station various parts should be carried out in advance, it is ensured that lifting station system
System can just carry out examination after normal condition and hang.
The other parts of the present embodiment are same as Example 1, and so it will not be repeated.
Embodiment 3:
The present embodiment advanced optimizes on the basis of above-described embodiment 1 or 2, the step B4 the following steps are included:
Step B4.1, the component of Bridge Erector is promoted to Liang Mianshang using lifting station, and the bridge floor platform between bridge pier is enterprising
The assembly of row Bridge Erector and the fortune beam orbit installation of beam face, after the completion of Bridge Erector is assembled, Bridge Erector successively carries out unloaded and heavy duty examination and hangs；
Step B4.2, the tail drop in beam counterweight of Bridge Erector is carried out in advance, and the fore-stock for the Bridge Erector that then comes to nothing simultaneously carries out Bridge Erector
Hitch frame complete machine move ahead, until Bridge Erector is set a roof beam in place state in hanging beam；
Step B4.3, the T beam on ground is promoted on bridge pier beam face and is placed on the fortune beam trolley of bridge floor by lifting station, fortune
The erection point that T beam is transported to Bridge Erector by beam trolley is in place；
Step B4.4, fortune beam trolley transport T beam enter bridge formation ventral lane predetermined position it is in place, Bridge Erector carries out hanging beam and sets a roof beam in place work
Industry；
Step B4.5, it after the completion of setting a roof beam in place, carries out the via hole of Bridge Erector, after the completion of via hole, carries out the circulation of step B3.1 to B3.4
Operation.
In the step B4.4 before carrying out T erection, the support installation for needing the pier position set a roof beam in place should be carried out in advance.
Support is put center line and is answered at a distance from bridge pier center in measuring first before carrying out via hole in the step B4.5
Less than or equal to 42m, then using the levelness of level measurement girder and middle support cross moving track, it is desirable that the longitudinal direction of girder and cross
To the gradient no more than defined 0.5%.
The other parts of the present embodiment are identical as above-described embodiment 1 or 2, and so it will not be repeated.
The above is only presently preferred embodiments of the present invention, not does limitation in any form to the present invention, it is all according to
According to technical spirit any simple modification to the above embodiments of the invention, equivalent variations, protection of the invention is each fallen within
Within the scope of.
Claims (8)
1. mountain terrain place Gao Dun rides pier formula door frame bridge lifting construction method, which comprises the following steps:
Step A, pier formula bale handle door frame is ridden in installation；
Step B, the promotion and subsequent erection of beam slab are carried out by riding pier formula bale handle door frame；
The step A the following steps are included:
Step A1, the upright post basic construction of pier formula bale handle door frame is ridden；
Step A2, the erection of the left column and right column of pier formula bale handle door frame is ridden；
Step A3, crossbeam is set up on column.
2. mountain terrain place Gao Dun according to claim 1 rides pier formula door frame bridge lifting construction method, feature exists
In the step A1 is the following steps are included: simultaneously according to pile foundation pore-forming, framework of steel reinforcement on the left side ground of two neighboring bridge pier
The construction on the sequence progress left column basis of construction, concreting, the Pile Diameter on the left column basis is 2.1m；
The step A2 the following steps are included: on the basis of left column pre-buried steel construction firmware, welded on the steel construction firmware
Steel construction pallet is connect, left column truss is set up on the steel construction pallet, after the completion of left column erection of truss, in left column purlin
The armored concrete of diameter 2m is poured within the scope of the 5-6m of frame lower part；The pre-buried steel construction firmware on pier cap beam, in the steel knot
Right column truss is set up on fixed piece；
The step A3 the following steps are included: between left column and right column merogenesis assemble crossbeam, as soon as every assembling section crossbeam,
Support frame is arranged on bent cap to be supported crossbeam, until crossbeam is completed.
3. mountain terrain place Gao Dun according to claim 2 rides pier formula door frame bridge lifting construction method, feature exists
In before the left column foundation construction, the clear distance of left column basis and bridge pier should be measured in advance, and the clear distance is greater than T beam and mentions
Space width needed for rising.
4. mountain terrain place Gao Dun according to claim 3 rides pier formula door frame bridge lifting construction method, feature exists
In, after the completion of the left column erection of truss in the step A2, the high-tensile steel wires cable of setting diameter 5cm on left column truss
Left column truss is connect by wind rope with bridge pier.
5. mountain terrain place Gao Dun according to claim 1 rides pier formula door frame bridge lifting construction method, feature exists
In, the step B the following steps are included:
Step B1, lifting station system is installed on the crossbeam, the lifting station system includes fixed lifting station and transverse shifting
Overhead traveling crane；
Step B2, passed through after T beam is promoted to the predetermined altitude of pier coping portion using the promotion that fixed lifting station carries out T beam
Overhead traveling crane is fixed T beam is traversing to transporting on beam on beam trolley；
Step B3, it will transport on T beam and beam and reinforced between beam trolley, then carry out fortune beam operation；
Step B4, the erection of T beam is carried out.
6. mountain terrain place Gao Dun according to claim 5 rides pier formula door frame bridge lifting construction method, feature exists
In, in the step B2 carry out T beam promotion when, should in advance the top surface of left column an angle point and crossbeam midpoint be arranged
Observation point observes the displacement of bale handle door frame and settling amount variation, observation method in T beam lifting process are as follows:
(1), the original coordinates of measuring and calculating and hourly observation point；
(2), T beam is promoted to the top of the concrete parts of left column, is paused 10 minutes, is calculated the new coordinate of observation point and count
Calculate the displacement of bale handle door frame；
(3), continue T beam promoting 6m, pause 10 minutes, calculate the new coordinate of observation point three times and calculate the displacement of bale handle door frame
Amount records three groups of data；
(4), continue T beam promoting 3m, pause 10 minutes, calculate the new coordinate of observation point twice and calculate the displacement of bale handle door frame
Amount records two groups of data；
(5), continue T beam promoting 2m, pause 5 minutes, calculate the new coordinate of observation point three times and calculate the displacement of bale handle door frame
Amount records three groups of data；
(6), continue for T beam to be promoted to pier coping portion predetermined altitude, pause 5 minutes, calculate the new coordinate of six observation points and count
The displacement and settling amount of bale handle door frame are calculated, six groups of data are recorded；
Once the displacement and settling amount of the bale handle door frame observed in T beam lifting process are abnormal, T beam should be stopped immediately
Promote simultaneously hidden trouble inspection.
7. mountain terrain place Gao Dun according to claim 6 rides pier formula door frame bridge lifting construction method, feature exists
In, the step B4 the following steps are included:
Step B4.1, the component of Bridge Erector is promoted to Liang Mianshang using lifting station, and the bridge floor platform between bridge pier is enterprising
Row Bridge Erector is assembled and the installation of beam face fortune beam orbit, after the completion of Bridge Erector is assembled, carries out Bridge Erector and successively carries out zero load and again
Examination is carried to hang；
Step B4.2, the tail drop in beam counterweight of Bridge Erector is carried out in advance, and the fore-stock for the Bridge Erector that then comes to nothing simultaneously carries out Bridge Erector
Hitch frame complete machine move ahead, until Bridge Erector is set a roof beam in place state in hanging beam；
Step B4.3, the T beam on ground is promoted on bridge pier beam face and is placed on the fortune beam trolley of bridge floor by lifting station, fortune
The erection point that T beam is transported to Bridge Erector by beam trolley is in place；
Step B4.4, fortune beam trolley transport T beam enter bridge formation ventral lane predetermined position it is in place, Bridge Erector carries out hanging beam and sets a roof beam in place work
Industry；
Step B4.5, it after the completion of setting a roof beam in place, carries out the via hole of Bridge Erector, after the completion of via hole, carries out the circulation of step B3.1 to B3.4
Operation.
8. mountain terrain place Gao Dun according to claim 7 rides pier formula door frame bridge lifting construction method, feature exists
Before, the fortune beam trolley in the step B3 carries out fortune beam operation, the sundries on fortune beam route should be cleared up in advance, checked flexible
Whether the laying of sleeper or steel plate at seam is smooth；When fortune beam trolley carries out fortune beam operation, carried out at the both ends of fortune beam trolley
Observation, it is ensured that the travelling route of fortune beam trolley is the center of beam rib.
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| CN110331672A (en) * | 2019-08-14 | 2019-10-15 | 中交一公局第一工程有限公司 | Across the pier bale handle holder device in bridge side position and its simple and fast construction method |
| CN112523087A (en) * | 2020-10-16 | 2021-03-19 | 保利长大工程有限公司 | A beam lifting station for beam slab erects |
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| CN110331672A (en) * | 2019-08-14 | 2019-10-15 | 中交一公局第一工程有限公司 | Across the pier bale handle holder device in bridge side position and its simple and fast construction method |
| CN112523087A (en) * | 2020-10-16 | 2021-03-19 | 保利长大工程有限公司 | A beam lifting station for beam slab erects |
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Application publication date: 20181218 |