CN112144401B - Bridge girder erection machine over-span method based on curve track and large longitudinal slope environment - Google Patents
Bridge girder erection machine over-span method based on curve track and large longitudinal slope environment Download PDFInfo
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- CN112144401B CN112144401B CN202010599001.8A CN202010599001A CN112144401B CN 112144401 B CN112144401 B CN 112144401B CN 202010599001 A CN202010599001 A CN 202010599001A CN 112144401 B CN112144401 B CN 112144401B
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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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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
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Abstract
The invention discloses a bridge girder erection machine crossing method based on a curve track and a large longitudinal slope environment, wherein the bridge girder erection machine linearly moves along the longitudinal bridge direction of bridges with the curve track and different heights, and the bridge girder erection machine crossing method comprises the following steps: s1, adding a plurality of pairs of temporary supporting legs at the plurality of supporting nodes at the bottom of the main beam, wherein the plurality of pairs of temporary supporting legs can move at the supporting positions at the bottom of the main beam at any time; s2, a plurality of supporting rotating devices are further arranged at the supporting nodes at the bottom of the main beam and used for adjusting the linear track position of the bridge girder erection machine on the bridge; and S3, a plurality of jacking devices are further arranged at the support nodes at the bottom of the main beam and used for adjusting the heights of different sections of the bridge girder erection machine. Can be widely applied to the technical field of bridge construction.
Description
Technical Field
The invention relates to the technical field of bridge construction. More specifically, the invention relates to a bridge girder erection machine crossing method based on a curved track and a large longitudinal slope environment.
Background
The Malaysia SUKE CA4 highway project is located on Malaysia capital Jilong slope, the upper structure of the bridge is mainly designed by prefabricated small box girders, the maximum designed longitudinal slope of the bridge is limited to +/-7% by topographic conditions, the maximum designed length of the small box girders is 42m, and a walking highway bridge girder erection machine is adopted for erection.
In view of the current situation of box girder mounted bridge girder erection machines at home and abroad, the current highway bridge girder erection machines in China can be divided into two categories of guide girder type bridge girder erection equipment and special bridge girder erection machines, and the performances are different. The conditions of a relatively mature erection line at home and abroad are that a longitudinal slope is within 3 percent, a transverse slope is within 5 percent, the minimum curve radius is 350m, and under the conditions, the bridge girder erection machine has small turning range, short supporting legs, good stability and large space for transporting and feeding the girder. The Malaysia SUKE CA4 project is limited by terrain and geographical position, the maximum longitudinal slope of the main line and ramp bridge part is designed to reach 7%, the maximum transverse slope reaches 6%, and the weight of the maximum small box girder is about 180 t. And part of the positions are in a small-radius curve state, the minimum curve radius of a route to be erected by the bridge girder erection machine is 160m, and the girder erection condition is extremely harsh, so that higher requirements on the performances of the bridge girder erection machine such as practicability, advancement, reliability and the like are provided.
Disclosure of Invention
The invention aims to provide a bridge girder erection machine crossing method based on a curved track and a large longitudinal slope environment.
To achieve these objects and other advantages and in accordance with the purpose of the invention, a bridge girder erection machine over-riding method based on a curved track and in a large longitudinal slope environment is provided, the bridge girder erection machine linearly moves along a longitudinal bridge direction of a bridge with the curved track and different heights, a plurality of support nodes are arranged at the bottom of a main girder of the bridge girder erection machine, support connection devices are arranged at the plurality of support nodes, each support connection device comprises a front support leg, a middle support leg and a tail support leg, and the method comprises the following steps:
s1, adding a plurality of pairs of temporary supporting legs at the plurality of supporting nodes at the bottom of the main beam, wherein the plurality of pairs of temporary supporting legs can move at the supporting positions at the bottom of the main beam at any time;
s2, a plurality of supporting rotating devices are further arranged at the supporting nodes at the bottom of the main beam and used for adjusting the linear track position of the bridge girder erection machine on the bridge;
and S3, a plurality of jacking devices are further arranged at the support nodes at the bottom of the main beam and used for adjusting the heights of different sections of the bridge girder erection machine.
Preferably, the temporary support legs comprise temporary middle support legs, the temporary middle support legs are arranged at the bottom of the main beam and are positioned between the front support legs and the middle support legs, and the temporary middle support legs can freely move along the length direction of the bottom of the main beam.
Preferably, the height of the temporary center leg is adjustable.
Preferably, several of the supporting rotation devices in the step S2 are rotation hinges, which are all disposed between the supporting connection device and the main beam.
A bridge girder erection machine box girder over-span construction step based on a curve track environment comprises the following steps:
a1, making a linear adjustment on the bridge girder erection machine to make the front leg to the middle leg section of the bridge girder erection machine be located at the position of the curve outer tangent line of the bridge;
a2, performing secondary linear adjustment on the bridge girder erection machine, taking the middle support leg as an axis, rotating the bridge girder erection machine, and enabling the segments of the bridge girder erection machine positioned on the front support leg and the middle support leg to rotate and move towards the straight track segment position of the bridge deck in the length extending direction of the bridge, so that the segments of the bridge girder erection machine positioned on the front support leg and the middle support leg cross the curved track segment of the bridge and are positioned on the straight track segment of the bridge;
and A3, linearly adjusting the bridge girder erection machine for three times, and pushing the bridge girder erection machine forward to enable the bridge girder erection machine to be positioned at the section of the middle leg and the tail leg to cross the section of the curved track of the bridge to the section of the straight track of the bridge.
Preferably, when the bridge girder erection machine performs secondary linear adjustment, the height difference between the main girder and the front support leg and the height difference between the main girder and the middle support leg are measured by a leveling device, and the gradient of the main girder is controlled within 1%.
A construction step of bridge erecting machine box girder crossing based on a height difference environment comprises the following steps:
b1, adjusting the bridge girder erection machine before spanning to enable each segment of the bridge girder erection machine to have a height adjusting condition;
b2, carrying out the ascending and crossing operation of the bridge girder erection machine, and enabling the front part of the bridge girder erection machine to move to the top of the crossing track;
and B3, carrying out downhill crossing operation on the bridge girder erection machine positioned on the top of the slope in the step B2, and enabling the whole bridge girder erection machine to be displaced to the horizontal section of the crossing track.
Preferably, in the step B2, the performing of the uphill crossing operation of the bridge girder erection machine includes performing multiple intermittent elevation lifts on each segment of the bridge girder erection machine, and performing a pushing operation to displace the bridge girder erection machine toward the top of the slope.
Preferably, in the step B3, the performing of the downhill crossing operation of the bridge girder erection machine includes performing multiple intermittent elevation drops on each segment of the bridge girder erection machine, and performing a pushing operation to displace the bridge girder erection machine toward the horizontal segment of the downhill.
Preferably, when the bridge girder erection machine performs the operation of ascending and crossing, the elevation of the bridge girder erection machine is raised, and when the bridge girder erection machine performs the operation of descending and crossing, the bridge girder erection machine is temporarily fixed by an anchoring device in the process of rising and falling.
The invention at least comprises the following beneficial effects:
1. the construction method has the advantages that the girder erection operation of the bridge girder erection machine under the conditions of small curves and large longitudinal slopes is realized, the applicability and safety performance of the bridge girder erection machine are improved, the efficiency of the girder erection operation is improved, the application field of the construction process of erecting small box girders by the bridge girder erection machine is widened, the construction cost is reduced, and the construction method has remarkable social benefits and economic benefits.
2. The problem of traditional bridge girder erection machine reply with the slope great and the great complicated construction mode of striding of curve is solved, among the traditional big longitudinal slope construction technology of striding, carry out the switching in turn through the mode of addding a plurality of interim landing legs in order to reach and stride the purpose, this mode safety risk is big, the construction is loaded down with trivial details, the working period is long, this technical scheme of application has effectively solved this technical drawback.
3. The problem of building a temporary auxiliary supporting platform in the span-crossing operation of the small-radius narrow-bridge-deck bridge girder erection machine is solved, the applicability and the operation efficiency of the bridge girder erection machine are improved, the application field of the construction process of erecting the small box girder by the bridge girder erection machine is widened, and the construction cost is reduced.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Detailed Description
The invention relates to a bridge girder erection machine crossing method based on a curve track and a large longitudinal slope environment, wherein the bridge girder erection machine linearly moves along the longitudinal bridge direction of bridges with the curve track and different heights, a plurality of support nodes are arranged at the bottom of a main beam of the bridge girder erection machine, support connecting devices are arranged at the support nodes and respectively comprise a front support leg, a middle support leg and a tail support leg, and the bridge girder erection machine crossing method comprises the following steps:
s1, adding a plurality of pairs of temporary supporting legs at the plurality of supporting nodes at the bottom of the main beam, wherein the plurality of pairs of temporary supporting legs can move at the supporting positions at the bottom of the main beam at any time;
s2, a plurality of supporting rotating devices are further arranged at the supporting nodes at the bottom of the main beam and used for adjusting the linear track position of the bridge girder erection machine on the bridge;
S3A plurality of jacking devices are arranged at the bottom of the main beam and at the plurality of supporting nodes and used for adjusting the heights of different sections of the bridge girder erection machine.
The first embodiment is as follows:
the construction striding step of the bridge girder erection machine with a curved track comprises the following steps:
adding a pair of temporary middle supporting legs
The minimum curve radius that the original design of bridge girder erection machine can pass is only 200m, and the landing leg antedisplacement is realized by inverting the tail landing leg and the middle landing leg every 1-2m, so that the middle landing leg and the tail landing leg need to be inverted ceaselessly when the bridge girder erection machine strides, the inversion times are many, the physical loss of workers is large, and the working efficiency is low. And the working condition that the bridge deck is 8.9m but the curve radius is only 160m exists on site, and exceeds the curve construction environment designed by the bridge crane (the steel pipe pile support is planned to be erected to assist the bridge crane to cross). A set of temporary middle supporting legs is added, so that the temporary middle supporting legs and the tail supporting legs can be staggered in tandem for supporting when the small curve crosses the span, the switching times of the middle supporting legs are reduced, and the erection of an auxiliary support of a bridge girder erection machine for curve construction is avoided.
(II) increasing the hinge base at the key position
Arranging hinged supports at key positions of the following bridging machines:
1. a rotary hinge is arranged below the reverse roller set mechanism of the front supporting leg, and a rotary hinge is arranged between the upper cross beam and the lower cross beam;
2. a rotary hinge is arranged below the reverse roller set mechanism of the middle supporting leg, and a rotary hinge is arranged between the ingot beam and the transverse moving mechanism beam;
3. the upper and lower beams of the crown block longitudinal movement mechanism are provided with a rotary hinge;
4. a rotary hinge is arranged at the joint of the transverse link and the guide beam.
When the curve section of the bridge girder erection machine strides over and the front and middle support legs move transversely in opposite directions, the lower cross beam of the front support leg and the transverse moving mechanism of the middle support leg move along the transverse moving track, the upper cross beam of the front support leg and the ingot beam of the middle support leg form reverse displacement with the mechanism below the hinged support in the transverse moving process, and the maximum adjusting amplitude can be obtained in single linear adjustment. The rotary hinged support below each supporting leg reverse roller group rotates along with the upper cross beam, and the stress formed between the beam and the supporting legs due to linear adjustment can be completely released by the hinged support.
When the front auxiliary supporting legs of the curve section bridge girder erection machine are in place on the cap beams of the front piers, the linear support of the front piers needs to be adapted, the deformation of a guide beam frame of the bridge girder erection machine needs to be adapted, and after a main beam on one side is singly pushed, the front transverse hinged support and the rear transverse hinged support of the guide beam and the hinged support of the overhead longitudinal movement mechanism are adapted to follow the selection and the rotation so as to overcome the stress of the transverse connection and the guide beam, and the stress of the overhead longitudinal movement mechanism and the guide beam.
(III) increasing the jacking stroke of the front supporting leg and the middle supporting leg
When the bridge girder erection machine passes through the longitudinal slope, the front supporting legs and the middle supporting legs need to be connected or disconnected with the heightening sections to adjust the height of the whole bridge girder erection machine when the gradient of the common bridge girder erection machine exceeds 2% of the gradient of the longitudinal slope, the mode has extremely low efficiency, and the safety risk of frequently switching the supporting legs and stressing is high. In the application, a set of climbing frame driven by an oil cylinder is additionally arranged on the front supporting leg, so that the free adjustable stroke of the front supporting leg reaches 3 m; a set of hydraulic oil cylinder jacking system is added to the middle supporting leg, so that the free adjustable stroke of the middle supporting leg reaches 1.4 m. The efficiency can be greatly improved, the force switching of each supporting leg under a high posture is reduced, the mounting and dismounting of a supporting leg heightening section are reduced, and the safety factor of large longitudinal slope crossing is increased.
Example two:
the construction striding step of the bridge girder erection machine in the environment track with the height difference comprises the following steps:
preparation work:
preparing for ascending; and removing the front temporary supporting leg heightening joints until the bottom elevation of the front temporary supporting leg is 20cm higher than the bottom elevation of the supporting leg when all heightening joints and the oil cylinder are removed by the front supporting leg to the shortest, so that the problem that the front trolley cannot be put in place on the front pier due to insufficient height of the front temporary supporting leg is avoided. And the downwarping amount of the main beam at different spans is considered when the elevation difference value is calculated.
Preparation for downhill: and (4) carrying out safety inspection before crossing, including conditions of bridge girder erection machines, bridge deck wet joint connection, tool rigging and the like. Then all heightening joints and transverse joints of the front auxiliary supporting leg and the front supporting leg are installed, the temporary middle supporting leg is disassembled to the rear part of the middle supporting leg to be installed, and the condition that the whole machine can be lowered in multiple stages is formed.
(II) climbing and crossing operation:
1. the first time of main beam is pushed forward
The line shape of the bridge erecting machine is adjusted through the transverse movement of the front supporting leg and the middle supporting leg, the line shape of a bridge span to be erected is matched, the girder is pushed forward for the 1 st time until the tail supporting leg is close to the middle supporting leg, and the anchoring pressing plate between the girder and the supporting leg is locked.
2. 1 st raising of bridge girder erection machine
Before the whole machine is lifted, the height of the tail support leg is adjusted, the stroke of the tail support leg is more than 20cm larger than the maximum jacking stroke of the front support leg, the space allowance of the reversing stroke of the tail support leg is reserved, and the tail support leg can be retracted and emptied after the middle support leg is stressed. Jacking is alternated with the tail landing leg in preceding landing leg, and the controllable stroke of the biggest safety of rising height according to preceding landing leg and tail landing leg is the standard, uses 6 3t calabashes to transversely, vertically link to each other tail landing leg and bridge floor embedded steel bar among the tail landing leg jacking process, tightens up the anchor calabash immediately after stopping the jacking.
And after the whole machine is lifted, heightening sections are added to the middle supporting leg according to the specific longitudinal slope gradient. The middle supporting leg and the temporary middle supporting leg move forwards to the distance between the front supporting leg and the middle supporting leg of about 27m, the middle supporting leg is supported under stress, the tail supporting leg is released after the middle supporting leg track sleeper is firmly supported, the middle supporting leg is completely stressed, the middle supporting leg and the bridge deck are anchored by 4 5t hoists, and the anchoring form is best in a splayed anchoring mode.
3. 2 nd lifting of bridge girder erection machine
The temporary middle support leg is moved forwards to a position 1.7m away from the rear center of the front support leg, the support is stressed, the front support leg is emptied, the heightening joint is added, and when the front support leg heightening joint and the travelling mechanism flange bolt are connected, the travelling mechanism is anchored with the track in advance to prevent side turning, and the height of the middle support leg is matched with the maximum jacking stroke of the front support leg. And (3) moving the tail support leg to the rear of the middle support leg by 2.5m, considering whether a heightening section is added to the tail support leg according to the concrete bridge gradient, and determining that the residual jacking stroke of the tail support leg is at least 20cm greater than the maximum jacking stroke of the front support leg. After the jacking of the tail support leg and the front support leg is stressed, the middle support leg and the temporary middle support leg are suspended, then the tail support leg and the front support leg are alternatively jacked to enable the whole bridge girder erection machine to be lifted, and the front-back height difference of the bridge girder erection machine in the lifting process is not more than 20 cm.
4. 3 rd rise of bridge girder erection machine
And (3) installing a cross connection on a third section heightening joint of the front support leg to increase the stability of the front support leg and the rear support leg after the front support leg is heightened, and repeating the steps according to the gradient of the bridge until the height of the front temporary support leg is matched with that of the front pier capping beam, so that the whole machine is lifted.
5. 2 nd forward pushing of bridge girder erection machine
The constraint of an anchoring pressing plate between a main beam and supporting legs is removed, the height difference of the main beam at the positions of the front supporting legs and the middle supporting legs is measured by a level gauge, the gradient of the main beam is ensured to be less than 1 percent, the front supporting legs are higher than the middle supporting legs, the front supporting legs and a bridge floor are tensioned and anchored by 2 hand chain blocks with 5t, the middle supporting legs and the bridge floor are anchored by 4 chain blocks with 5t, the front supporting legs and an advanced pier body are anchored by 2 chain blocks with 5t, and the stability of each supporting leg is ensured. And (4) retreating the forward travelling crane of the main beam until the position of the front temporary supporting leg is more than 7cm from the edge of the front pier capping beam, reserving a space for a protective layer and installing the front supporting leg, and enabling the front temporary supporting leg to be supported on the capping beam. And (4) retracting the temporary middle supporting leg, moving to the position 0.5m behind the front supporting leg, simultaneously jacking the tail supporting legs at two sides to enable the middle supporting leg to be suspended, removing the heightening section of the middle supporting leg, and moving the middle supporting leg to the position behind the temporary middle supporting leg for supporting and anchoring.
6) The 3 rd forward push of the bridge girder erection machine
The front support leg is retracted to advance to the front pier, and the forward movement of the front support leg needs to be slowly carried out when in place so as to prevent the front support leg from impacting the front temporary support leg to cause the instability of the bridge girder erection machine. After the front supporting legs are in place, the overhead traveling crane moves to the midspan, the tail supporting legs are folded, the height difference between the front supporting legs and the middle supporting legs is adjusted by using the front supporting leg oil cylinders to ensure that the gradient of the main beam is less than 1%, 4 5-ton hoists and steel wire ropes are used for anchoring the front supporting legs, the bridge deck embedded ribs and the pier bodies of the front piers, the main beam is pushed forwards until the front supporting legs and the middle supporting legs are respectively supported in a high shear-resistant area of the main beam, and finally, the parallelism of the tracks of the front supporting legs and the middle supporting legs is measured by using a tape measure to ensure that the two tracks are absolutely parallel, so that the transverse moving of the bridge girder erection machine is prevented from gnawing the track instability. When the tail support leg is supported and cushioned, the tail support leg can be supported in a staggered mode, the position of a channel of the girder transporting vehicle is reserved, and the bridge girder erection machine is finished in a crossing mode at the moment.
(III) downhill crossing operation:
1. the first stage of the bridge girder erection machine is lowered: the tail supporting leg moves to the rear of the middle supporting leg, the middle supporting leg moves forwards to a position which is about 27 meters away from the front supporting leg, and the middle supporting leg is anchored by pulling a calabash to form a splayed shape after being stressed. The overhead traveling crane moves forward to a position between the front supporting leg and the middle supporting leg and close to the middle supporting leg. And (3) retracting the tail support leg, alternately operating the front support leg and the middle support leg, and when the main beam is alternately lowered, lowering the middle support leg and then lowering the front support leg, wherein the height difference is required to be not more than 20cm, and the middle support leg is stopped when the stroke of 20cm remains so as to avoid that the middle support leg cannot be separated from the bridge floor due to overlarge gap after the reverse roller train and the main beam are emptied.
2. Pushing the bridge girder erection machine forwards on a downhill for the second time: the step is similar to the second forward pushing of the uphill overpass bridge girder erection machine, except that the position of the front auxiliary supporting leg is at least 15cm away from the edge of the front pier capping beam, and at the moment, the front auxiliary supporting leg needs to be accurately positioned by a plumb bob. The step is a key step, and the auxiliary supporting legs of the bridge girder erection machine can not be supported on the advanced pier capping beam easily due to the reasons that the deflection of the main beam changes after being loaded, the height difference of the front supporting leg and the tail supporting leg is not matched before and after the second-stage reduction of the whole bridge girder erection machine and the like. When in positioning, the main arm is required to be stretched out to be short and not long, and if the main arm is too long, the middle supporting leg is in a suspended state and cannot retreat, so that serious consequences are caused; if the length is shorter, the front supporting leg can be used for secondary positioning on the advanced pier capping beam to adjust the standing position of the front auxiliary supporting leg.
3. And reducing the final stage of the bridge girder erection machine: the tail support leg moves to the tail of the main beam and extends out for the maximum safe stroke, and the high-section support is installed according to the actual gradient, so that the middle support leg is emptied. Use 6 calabashes to anchor tail landing leg and bridge floor through "eight characters" anchor, with the taut anchor of 2 calabashes with preceding landing leg and bridge floor, locked the anchor clamp plate between girder and the landing leg. Two crown blocks move to the position near the tail support leg, the middle support leg moves forwards to the back of the front support leg, the tail support leg and the front support leg are operated to be lowered alternately, when the main beam is lowered alternately, the tail support leg is lowered first, then the front support leg is lowered, and the front-back height difference in the process is not more than 20 cm. Under the working condition of a large cantilever, the whole machine is lowered to the lowest position until the tail supporting leg can not be lowered.
4. The stress of the tail supporting leg and the temporary middle supporting leg is switched: stretching the temporary middle supporting leg for a stroke, supporting a sleeper, anchoring the tail supporting leg and the bridge deck by using 6 hoists, locking an anchoring pressing plate between the main beam and the temporary middle supporting leg, slowly retracting the tail supporting leg, switching the stress to the temporary middle supporting leg, and removing all heightening joints of the tail supporting leg. And the temporary middle supporting leg and the front supporting leg are alternately lowered until the front auxiliary supporting leg is supported on the front pier in a stressed manner, then the middle supporting leg is supported behind the front supporting leg in a stressed manner, and the whole machine is lowered.
While embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields of application of the invention, and further modifications may readily be effected by those skilled in the art, so that the invention is not limited to the specific details without departing from the general concept defined by the claims and the scope of equivalents.
Claims (7)
1. A bridge girder erection machine striding method based on a curve track and a large longitudinal slope environment is characterized in that the bridge girder erection machine linearly moves along the longitudinal bridge direction of a bridge with the curve track and different heights, a plurality of supporting nodes are arranged at the bottom of a main girder of the bridge girder erection machine, supporting and connecting devices are arranged at the supporting nodes and respectively comprise a front supporting leg, a middle supporting leg and a tail supporting leg, and the bridge girder erection machine striding method is characterized by comprising the following steps:
s1, adding a plurality of pairs of temporary supporting legs at the plurality of supporting nodes at the bottom of the main beam, wherein the plurality of pairs of temporary supporting legs can move at the supporting positions at the bottom of the main beam at any time;
s2, arranging a plurality of supporting rotary devices at the supporting nodes at the bottom of the main beam for adjusting the linear track position of the bridge girder erection machine on the bridge;
s3, arranging a plurality of jacking devices at the supporting nodes at the bottom of the main beam, and adjusting the heights of different sections of the bridge girder erection machine;
the temporary support legs comprise temporary middle support legs, so that the temporary middle support legs and the tail support legs can be staggered and supported in tandem when the small curves cross;
wherein, the construction step is striden to frame bridge machine case roof beam when based on curve track environment, includes:
a1, making a linear adjustment on the bridge girder erection machine to make the front leg to the middle leg section of the bridge girder erection machine be located at the position of the curve outer tangent line of the bridge;
a2, performing secondary linear adjustment on the bridge girder erection machine, taking the middle support leg as an axis, rotating the bridge girder erection machine, and enabling the segments of the bridge girder erection machine positioned on the front support leg and the middle support leg to rotate and move towards the straight track segment position of the bridge deck in the length extending direction of the bridge, so that the segments of the bridge girder erection machine positioned on the front support leg and the middle support leg cross the curved track segment of the bridge and are positioned on the straight track segment of the bridge;
a3, performing three linear adjustments on the bridge girder erection machine, and pushing the bridge girder erection machine forward to enable the bridge girder erection machine to be positioned at the section of the middle leg and the tail leg to cross the section of the curved track of the bridge to the section of the straight track of the bridge;
the step of construction is striden to frame bridge crane case roof beam when based on difference in height environment includes:
b1, adjusting the bridge girder erection machine before spanning to enable each segment of the bridge girder erection machine to have a height adjusting condition;
b2, carrying out the ascending and crossing operation of the bridge girder erection machine, and enabling the front part of the bridge girder erection machine to move to the top of the crossing track;
and B3, carrying out downhill crossing operation on the bridge girder erection machine positioned on the top of the slope in the step B2, and enabling the whole bridge girder erection machine to be displaced to the horizontal section of the crossing track.
2. The bridge girder erection machine spanning method in the environment of curved track and large longitudinal slope according to claim 1, wherein the height of the temporary middle support leg is adjustable.
3. The bridge girder erection machine spanning method according to claim 1, wherein a plurality of the supporting rotation devices in the step S2 are rotation hinges, each of which is disposed between the supporting connection device and the main girder.
4. The bridge girder erection machine spanning method based on the curved track and the large longitudinal slope environment as claimed in claim 1, wherein the gradient of the main girder is controlled within 1% by measuring the height difference of the main girder at the front support leg and the middle support leg through a leveling device during the secondary linear adjustment of the bridge girder erection machine.
5. The bridge girder erection machine crossing method in the environment of curved tracks and large longitudinal slopes according to claim 1, wherein in the step B2, the performing of the operation of the bridge girder erection machine crossing the upward slope comprises performing intermittent elevation lifting for each segment of the bridge girder erection machine for a plurality of times, and performing pushing operation to displace the bridge girder erection machine towards the top of the slope.
6. A bridge girder erection machine crossing method according to claim 1 or 5, wherein in the step B3, the descending and crossing operation of the bridge girder erection machine comprises intermittently descending and pushing each segment of the bridge girder erection machine for displacing the bridge girder erection machine towards the horizontal segment of the descending slope.
7. The bridge girder erection machine crossing method based on the curved track and the large longitudinal slope environment as claimed in claim 1, wherein an anchoring device is arranged to temporarily fix the bridge girder erection machine during the elevation lifting of the bridge girder erection machine during the ascending crossing operation and the elevation lowering of the bridge girder erection machine during the descending crossing operation.
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| CN113802467B (en) * | 2021-10-27 | 2023-05-09 | 重庆城建控股(集团)有限责任公司 | Large-gradient girder erecting method based on bridge girder erecting machine |
| CN115807387B (en) * | 2022-11-30 | 2024-01-16 | 中交四航局第一工程有限公司 | Bridge girder erection machine with small radius curve and large gradient and narrow ramp and construction method |
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| JP2000257022A (en) * | 1999-03-08 | 2000-09-19 | Sanshin Kogyo Kk | Erection device for bridge |
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| JP2004100382A (en) * | 2002-09-12 | 2004-04-02 | Mitsubishi Heavy Ind Ltd | Bridge girder erection method |
| CN202247686U (en) * | 2011-09-09 | 2012-05-30 | 中交第四公路工程局有限公司第五工程处 | Bridge erecting machine for construction method for ultra-small-radius frame beam |
| CN103696374B (en) * | 2013-12-25 | 2015-10-28 | 中铁大桥勘测设计院集团有限公司 | Horizontal curve section is greatly across freely-supported steel trussed beam cantilever erection method |
| CN107313358B (en) * | 2017-08-30 | 2019-01-04 | 中国建筑第五工程局有限公司 | For the beam erecting method and Bridge Erector under big longitudinal slope operating condition |
| CN109763430B (en) * | 2019-01-31 | 2020-12-29 | 浙江中建路桥设备有限公司 | Bridge girder erection machine for girder erection by means of curved holes and application method of bridge girder erection machine |
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| JP2000257022A (en) * | 1999-03-08 | 2000-09-19 | Sanshin Kogyo Kk | Erection device for bridge |
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