CN111809529A - Mounting system of steel truss girder bridge - Google Patents
Mounting system of steel truss girder bridge Download PDFInfo
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- CN111809529A CN111809529A CN202010839083.9A CN202010839083A CN111809529A CN 111809529 A CN111809529 A CN 111809529A CN 202010839083 A CN202010839083 A CN 202010839083A CN 111809529 A CN111809529 A CN 111809529A
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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
Abstract
The invention relates to an installation system of a steel truss girder bridge, which comprises a temporary buttress mechanism, a main pier and a plurality of steel girder small segments, wherein the temporary buttress mechanism is used for placing the steel girder small segments and pushing the steel girder small segments to preset positions on the top of the main pier so that the two steel girder small segments are folded to obtain a steel girder large segment; the horizontal rotation turntable mechanism comprises a horizontal rotation turntable which is arranged on the top of the main pier and is used for horizontally rotating the large steel beam section to a preset position; and the locking pier structure is provided with a locking structure for locking the side span end of the large section of the steel beam at the preset position. This application has realized prefabricating the girder steel large segment section in the mill, has guaranteed the construction quality of the girder steel large segment section, reduces the influence of site operation technology to girder structure atress, has realized the integral erection of girder steel large segment section. Meanwhile, the temporary buttress mechanism and the locking pier structure are arranged, so that the occupation of roads and navigation channels under the bridge is avoided, and the passage of the roads and the navigation channels under the bridge is not obstructed in the bridge construction process.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to an installation system of a steel truss girder bridge.
Background
The beam bridge using steel truss as main bearing structure is one spatial structure comprising two main trusses, longitudinal connecting system and transverse connecting system. In the prior art, the conventional construction process of the main beam of the large-span steel truss girder bridge usually adopts a segmental cantilever assembly method or a jacking method and the like for construction. When the segmental cantilever is constructed in an assembling mode, the construction period is relatively long, the assembling procedures are multiple in field construction, and the bridge construction precision and the connection quality are influenced. For a girder bridge with a large span, a pushing construction method is adopted for bridge construction, auxiliary piers are required to be arranged section by section to influence navigation or traffic communication within the span range, great restriction is generated on construction space, construction workload is increased, meanwhile, pushing construction has certain influence on bridge forming line type, stress of a girder body in a construction stage and the like, and stress of a bridge structure is unfavorable.
Disclosure of Invention
In order to overcome the technical problems, in particular to the problems that the construction period is long, the working procedures are multiple, the construction precision and the connection quality of the bridge cannot be guaranteed, the construction space is restricted greatly, and the construction workload is large, the following technical scheme is provided:
the embodiment of the application provides a mounting system of steel truss girder bridge includes:
the temporary buttress mechanism is used for placing the small steel beam sections and pushing the small steel beam sections to preset positions on the top of the main pier so as to enable the two small steel beam sections to be folded to obtain large steel beam sections;
the horizontal rotation turntable mechanism comprises a horizontal rotation turntable which is arranged on the top of the main pier and is used for horizontally rotating the large steel beam section to a preset position;
and the locking pier structure is provided with a locking structure for locking the side span end of the large section of the steel beam at the preset position.
Optionally, the temporary buttress mechanism includes a temporary buttress and a displacement device disposed on the temporary buttress.
Optionally, the displacement device comprises a jacking device and a jacking device.
Optionally, the temporary buttress is a steel platform structure, the steel platform structure includes steel pipe piles, and sets up in steel platform on the steel pipe pile, between the steel pipe pile and be provided with spandrel girder and auxiliary beam under the steel platform.
Optionally, the load-bearing beam and the auxiliary beam are made of section steel.
Optionally, the flatwise rotation turntable mechanism further comprises a flatwise rotation auxiliary pier structure, and the flatwise rotation auxiliary pier structure is located at the bottom of the largest cantilever end beam of the flatwise rotation turntable.
Optionally, the horizontal rotation auxiliary pier structure is a steel pipe pile support structure, and includes a steel pipe pile foundation, an upright column connected to the steel pipe pile foundation, and a horizontal connection disposed between two opposite upright columns.
Optionally, the locking structure is an anchoring structure that provides a vertical locking force to the side span end of the large section of steel beam.
Optionally, the locking pier structure is a steel pipe pile support structure, and includes a steel pipe pile foundation, an upright post connected with the steel pipe pile foundation, and a parallel connection arranged between two opposite upright posts, and a bearing beam is further arranged between the upright posts.
Optionally, the steel beam large section comprises a steel beam sub-section, and the steel beam sub-section is arranged on the steel beam large section.
Compared with the prior art, the invention has the following beneficial effects:
the installation system of the steel truss girder bridge comprises a temporary buttress mechanism, a main pier and a plurality of steel girder small sections, wherein the temporary buttress mechanism is used for placing the steel girder small sections and pushing the steel girder small sections to preset positions on the tops of the main piers so that the two steel girder small sections are folded to obtain a steel girder large section; the horizontal rotation turntable mechanism comprises a horizontal rotation turntable which is arranged on the top of the main pier and is used for horizontally rotating the large steel beam section to a preset position; and the locking pier structure is provided with a locking structure for locking the side span end of the large section of the steel beam at the preset position. This application has realized prefabricating the girder steel large segment in the mill, has guaranteed the construction quality of the girder steel large segment, reduces the influence of site operation technology to girder structure atress, has also improved the present efficiency of construction simultaneously, only need be with the girder steel segment by low level jacking to elevation position at the job site, and the top pushes away the translation, through the flat carousel with the girder steel large segment translation to design position, the integral erection of girder steel large segment has been realized. Meanwhile, the temporary buttress mechanism and the locking pier structure are arranged, so that the occupation of roads and navigation channels under the bridge is avoided, and the passage of the roads and the navigation channels under the bridge is not obstructed in the bridge construction process.
The installation system of steel truss girder bridge that this application embodiment provided sets up a plurality ofly respectively in the same direction as the bridge to both sides interim buttress mechanism include interim buttress, set up in displacement device on the interim buttress. The displacement device comprises a jacking device and a pushing device. The temporary buttress is a steel platform structure, the steel platform structure include the steel-pipe pile, and set up in steel platform on the steel-pipe pile, between the steel-pipe pile and be provided with spandrel girder and auxiliary beam under the steel platform, and then when carrying out girder steel subsection top pushing, can realize the continuous top of multiple spot and push away for girder steel subsection can steadily, fast, accurate propelling movement to the preset position department on the main pier top.
The embodiment of the application provides a mounting system of steel truss girder bridge, the flat turn carousel mechanism still includes the supplementary mound structure of flat turn, the supplementary mound structure of flat turn is located at the bottom of the biggest cantilever end beam of flat turn carousel. The horizontal rotation auxiliary pier structure is a steel pipe pile support structure and comprises a steel pipe pile foundation, stand columns connected with the steel pipe pile foundation and a horizontal connection arranged between two opposite stand columns. When the large steel beam segment is flatly rotated, the safe flatly-rotating auxiliary pier structure is arranged through the large steel beam segment, the large steel beam segment is flatly rotated to the preset position in multiple steps, the large steel beam segment is flatly rotated to the preset position in a convenient and accurate mode, the flatly-rotating accuracy of the large steel beam segment is improved, and meanwhile the safety of the large steel beam segment in the flatly-rotating process is guaranteed.
The installation system of steel truss girder bridge that this application embodiment provided, locking structure is for to the side span end of the big section of girder steel provides the anchor structure of vertical locking power. The large steel beam section which is horizontally rotated in place can be ensured to be positioned at the designed position before the whole bridge is folded, and the condition that the large steel beam section collapses when the stress is not uniform is avoided.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural view of a steel beam small segment placed on a temporary buttress structure and pushed to the top of a main pier by a displacement device on the temporary buttress structure;
FIG. 2 is a schematic structural diagram of the temporary buttress, the flat-turning turntable and the locking buttress structure of the present invention, mainly showing the relative positions of the temporary buttress, the flat-turning turntable and the locking buttress structure;
FIG. 3 is a schematic structural view of the temporary buttress structure of the present invention with a jacking device and a jacking device;
FIG. 4 is a schematic structural view of the pan turntable in the front view direction;
FIG. 5 is a schematic structural view of the horizontal rotary table structure of the present invention in a top view;
FIG. 6 is a schematic structural view of the process of the invention for the horizontal rotation of a turntable for the horizontal rotation of a large section of a steel beam, showing a schematic structural view of the position of an auxiliary pier;
fig. 7 is a schematic structural view of mid-span closure of the steel truss girder bridge according to the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, and/or operations, but do not preclude the presence or addition of one or more other features, integers, steps, operations, and/or groups thereof.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The embodiment of the application provides a pair of steel truss girder bridge's installing the system, in order to guarantee the smooth installation of bridge, and can steadily in the installation of girder steel each stage, it is quick, transport accurately, as shown in fig. 1, the application has built the concora rotation carousel 8 on 1 top of main mound, and a plurality of interim buttresses 5 have been built respectively to both sides in the same direction as the bridge of concora rotation carousel 8, interim buttresses 5 are used for placing girder steel subsection 3 temporarily, and be provided with the displacement device who promotes adjustment girder steel subsection position on interim buttresses 5, the displacement device includes jacking device 6, and place in the jacking device 7 at jacking device 6 tops. As shown in fig. 1, before the two steel girder segments 3 are closed on the top of the main pier 1, the two steel girder segments 3 are placed on the temporary buttresses 5 at both sides in the bridge direction, so that the steel girder segments 3 are smoothly pushed on the temporary buttresses 5.
The embodiment of the application provides a mounting system of steel truss girder bridge includes: the temporary buttress mechanism, the flat rotating disc mechanism and the locking buttress structure are shown in figure 2, and the relative positions of the temporary buttress 5 in the temporary buttress mechanism, the flat rotating disc 8 in the flat rotating disc mechanism and the locking buttress structure 10 are shown in figure 2.
The temporary buttress mechanism is used for placing the small steel beam sections and pushing the small steel beam sections to preset positions on the top of the main pier, so that the two small steel beam sections are folded to obtain the large steel beam section.
In the embodiment that this application provided, because the rigidity of bridge, the position that consequently each girder steel segment section was located is also fixed, for the ease of installation, adopts suitable hoist and mount and the construction of the interim buttress structure of mechanical equipment construction in preset position department, and interim buttress structure satisfies bearing capacity and stability requirement simultaneously to the position that makes interim buttress structure locate can guarantee that the little section of girder steel can move smoothly and target in place. Before placing the steel beam small segment to the temporary buttress structure, a displacement device for adjusting the position of the steel beam small segment is required to be arranged on the temporary buttress structure, so that the steel beam small segment can be jacked and pushed through the displacement device.
Alternatively, as shown in fig. 3, the temporary pier 5 is a steel platform structure, the steel platform structure includes steel pipe piles 51, and steel platforms 52 disposed on the steel pipe piles, and load-bearing beams and auxiliary beams are disposed between the steel pipe piles 51 and under the steel platforms 52. Optionally, spandrel girder and auxiliary beam are made by shaped steel, and shaped steel has guaranteed interim buttress 5's rigidity and stability, has alleviateed interim buttress 5's weight simultaneously, the temporary buttress 5's of being more convenient for build. The temporary buttress 5 is of a steel platform structure, the steel platform structure has good flatness, the displacement device can be placed better, the displacement accuracy and stability of the displacement device are ensured, a steel platform horizontal connection structure 53 is arranged between the steel pipe piles 51, and the stability and safety between the steel pipe piles 51 are further ensured; the steel pipe pile 51 is also provided with a steel pipe pile column foundation, and further ensures the stability of the temporary pier 5.
With continued reference to fig. 3, the displacement device includes a jacking device and a jacking device. Before the jacking device jacks the small steel beam section, the jacking device is arranged at the initial position. Be provided with base 62 between jacking device and the steel platform for jacking device has better stability and support nature. The corresponding upright post of the steel pipe pile 5 is the main upright post when the jacking device is installed on the temporary buttress 5, so that the strength and the rigidity of the upright post need to be ensured. Before the jacking device jacks the steel beam small section 3, the flatness of the jacking device needs to be guaranteed, and meanwhile jacking equipment of all fulcrums of each beam body 61 is adjusted in place according to the elevation of the corresponding beam body 61, wherein the beam body 61 is a jacking standard beam. The jacking device is arranged at the top of the jacking device and comprises a walking jacking device 71, a steel beam pad 72, a transverse jack 73 and a longitudinal jack 74, so that stable adjustment of three-dimensional displacement is conveniently provided for the pushed small steel beam section, and the translation precision of the small steel beam section is ensured.
After the temporary buttress structure is built, the small sections of the steel beam are transported to the preset positions of the region where the temporary buttress structure is located, and the preset positions are regions convenient for fulcrum conversion. On the fulcrum of girder steel segmental element was converted into interim buttress structure in preset position department, realized placing girder steel segmental element on interim buttress structure. The steel beam small section is transported to the bridge position by adopting equipment such as barges or beam-transporting flatcars to fold the steel truss beam, and meanwhile, the steel beam small section supporting points are converted to the temporary buttresses through jacking devices placed on the temporary buttresses in advance, and meanwhile, the transporting equipment is driven out, so that the whole beam section is stably placed on the jacking equipment.
The horizontal rotation turntable mechanism comprises a horizontal rotation turntable which is arranged on the top of the main pier and used for horizontally rotating the large steel beam section to a preset position.
The steel beam small section is displaced to a preset position on the top of a main pier through a temporary buttress mechanism, and after the steel beam large section is obtained after welding is completed, in order to adjust the position of the steel beam large section to the preset position, the position of the steel beam large section needs to be adjusted through a flat rotating disc mechanism. Correspondingly, the construction of a flat-turning turntable mechanism is required. As shown in fig. 4 and 5, the construction of the main pier 1 of the bridge and the bearing platform thereof is completed, and according to the construction site situation, a suitable hoisting device is adopted, and a flat-turning turntable is installed on the main pier 1, wherein the flat-turning turntable comprises a turntable, a brace 84 and the like, and the shadow of the brace 84 in fig. 4 is used for showing the position of the brace 84 installed below the flat-turning slideway steel box 82. An upright steel pipe 81 is arranged between the flat rotary table and the main pier 1 to realize the support of the main pier 1 to the flat rotary table. The turntable is provided with a central rotating shaft 83 for flat rotation, a slide steel box 82 for flat rotation and a traction jack 85 for traction of a large section of steel girder. When the flat-turning rotary table is installed, the positioning accuracy is required to be ensured, and particularly, the flat-turning accuracy of the large steel beam section is ensured by a rotary table system, a slide way and the like.
In order to realize the stable flat rotation of the small steel beam sections, the flat rotation turntable mechanism further comprises a flat rotation auxiliary pier structure, so that the large steel beam sections can be subjected to flat rotation step by step, and the stability and the safety in the flat rotation process are ensured. Optionally, as shown in fig. 6, the auxiliary flat-turning pier structure 9 is located at the bottom of the largest cantilever end of the flat-turning turntable 8, i.e., below the cantilever end of the large steel beam segment formed by the small steel beam segment 3, and the auxiliary flat-turning pier structure 9 is a steel pipe pile support structure and includes a steel pipe pile foundation, a stand column connected to the steel pipe pile foundation, and a flat connection disposed between two opposite stand columns, so as to ensure the stability and safety of the large steel beam segment on the auxiliary flat-turning pier structure 9, and facilitate adjustment of the flat-turning process, the large steel beam segment is placed on the auxiliary flat-turning pier structure 9, thereby ensuring the flat-turning precision and the flat-turning position of the large steel beam segment. Therefore, before the flat turning, a flat turning auxiliary pier structure is built on a flat turning curve of the side span end of the large steel beam section. In the flat turning process, the flat turning turntable firstly horizontally turns the side span end of the large steel beam section to the flat turning auxiliary pier structure from the temporary pier structure, and then horizontally turns to the preset position from the flat turning auxiliary pier structure, so that the stability and the safety in the flat turning process are ensured.
The locking pier structure is provided with a locking structure for locking the side span end of the large steel beam section at the preset position.
Optionally, the locking structure is an anchoring structure that provides a vertical locking force to the endspan end of the large section of steel beam. Optionally, the locking pier structure is a steel pipe pile support structure and comprises a steel pipe pile foundation, a stand column connected with the steel pipe pile foundation and a parallel connection arranged between two opposite stand columns, wherein a bearing beam is further arranged between the stand columns, so that the locking pier can lock a large steel beam section and can bear the gravity transmitted by the large steel beam section to the locking pier structure, and the stability in the locking process can be ensured by the parallel connection.
After the horizontal rotation welding of the large steel beam section is completed, in order to avoid the displacement of the side span end of the large steel beam section in the construction process of the steel beam, the large steel beam section is ensured to be in the designed position. A locking pier structure is built at a preset position (design position) of the large steel beam section, so that the side span end of the large steel beam section which is horizontally rotated in place can be temporarily locked on the locking pier, and the locking of a bridge girder unit is realized. Optionally, the locking structure provided on the locking pier is an anchoring device, and the side span end of the large section of the steel beam is anchored by the anchoring device so as to fix the side span end at the preset position and avoid the side span end from shifting. The vertical locking force provided by the anchoring structure ensures that the large steel beam section which rotates horizontally in place can be located at the designed position before the whole bridge is folded, and meanwhile, the condition that the large steel beam section collapses when the stress is uneven is avoided.
Optionally, the steel beam transportation device further comprises a transportation channel arranged on the steel beam large section and used for transporting the steel beam sub-section.
After the installation and locking of the large steel beam section are completed, in order to facilitate the installation of other steel beam subsections, a temporary transportation channel is built on the large steel beam section, the steel beam subsections are transported to an installation position through the temporary transportation channel, the steel beam subsections are connected with the side span end of the large steel beam section, the folding of the middle span and other sections of the bridge is realized, the whole bridge is built, and the side span end of the large steel beam section is locked on the locking pier.
In one embodiment, as shown in fig. 7, after the current section of steel beam large section is completed, in order to realize the folding of the bridge mid-span, a transportation channel is built on the locked steel beam large section, the steel beam small section 3 in the next section of steel beam large section is transported through the transportation channel, the steel beam small section is transported to the temporary buttress structure of the next section of steel beam large section, the steel beam large section of the next section is installed on the pier top of the main pier 1, that is, the steel beam small section is transported and placed on the temporary buttress, the steel beam small section is pushed to the design position through the pushing and jacking device on the temporary buttress, and the next section of steel beam large section is welded and locked. Then the folding ends 31 of the large sections of the two steel beams are folded and welded to realize the folding of the mid-span, and the mid-span is placed on the pier body 2 of the main pier 1. Meanwhile, other steel beam subsections can be transported through the transportation channel to be connected with the side span end of the steel beam large subsection, and the whole bridge is built.
The steel truss girder bridge provided by the embodiment of the application realizes the prefabrication of two girder steel small sections of the girder steel sub-section and the girder steel large section in a factory at the initial installation, avoids the manufacture of the girder steel small section on a construction site, has small linear error of the bridge girder preset by the linear of the bridge girder after the bridge is formed, and meets the preset error threshold. Meanwhile, stress points of the stress structure of the bridge are all in a preset position range, and the bridge can be stressed correctly, so that the precision and the good stress condition of the whole structure of the large section of the steel beam are guaranteed. Because the mode of factory prefabrication is adopted, the construction period of the steel truss girder bridge is shortened, and the construction efficiency and the quality of the steel truss girder bridge are improved.
When the installation system of the steel truss girder bridge that adopts this application to provide is installed, build the completion at interim buttress structure, and the girder steel subsection place interim buttress structure on after, then push away and the jacking to the girder steel subsection. Through jacking device on the interim buttress structure, with the perpendicular jacking of girder steel subsection to elevation position, then adopt thrustor with girder steel subsection flat push to the preset position department on the main mound top. In the embodiments provided by the present application, at least two temporary buttress structures are provided on a single side, each temporary buttress structure being provided with a displacement device. The jacking device is arranged at the top end of a jacking tower in the jacking device, and at least one set of jacking device is further arranged on one jacking device according to the stress of a fulcrum, so that the small sections of the steel beam can be continuously pushed to the preset position on the top of the main pier in a multi-point manner.
Each temporary buttress structure is provided with a group of jacking devices, each jacking device consists of synchronous jacking equipment and a stabilizing system, and each jacking system adopts an ALE MJS5200 intelligent synchronous jacking device; the main components of the jacking device comprise a beam feeding slideway, a jacking base, a standard beam, a temporary support, a starting beam, a bearing platform and the like. The main components of the stabilizing system comprise a truss parallel connection, a stabilizing cable, a vertical stabilizing cable and the like, the truss parallel connection is formed by forming truss girders by steel pipes, and the strength and the rigidity meet the structural design requirements. The pushing device comprises a slide way, a vertical hydraulic jack, a transverse hydraulic jack and a longitudinal hydraulic jack, and provides three-way adjustment to ensure the translation precision of the beam section. Temporary buttresses are arranged on two sides of the pushing device, and a steel pad beam and an elastic rubber pad are arranged above the vertical jack.
Optionally, in the embodiment provided by the application, the jacking system and the synchronous jacking system are included, so that the jacking devices on the multiple temporary buttress structures on the single side run synchronously, and the jacking devices on the multiple temporary buttress structures on the single side run synchronously. A synchronous jacking system is adopted for jacking the beam section, during jacking, a jacking hydraulic jack jacks up, a bottom opening of the frame body jacks up to the top surface of the temporary support, the temporary support rotates 90 degrees, and the additional joint opening is opposite to the transverse additional joint slideway; the jacking hydraulic jack descends below the additional section slideway, and the frame body is supported on the movable supporting leg; the horizontal jacking standard beam slides in through the added-section slideway and is connected with the upper frame body to complete one-turn jacking. And synchronously jacking section by section to a corresponding elevation, then setting a stabilizing cable and a truss parallel connection in time, and temporarily locking the jacking equipment after jacking the small section of the steel beam until the small section exceeds the designed elevation by about 20 cm.
After jacking is completed, enabling the jacking device to jack the steel beam small sections through the jacking system, jacking and translating the beam sections to be close to the top of the main pier, and completing the alignment welding of the two steel beam small sections at the top of the main pier to form a steel beam swivel section; and starting a synchronous pushing system, pushing and translating the single steel beam small section to a preset position on the top of the main pier through a pushing device, temporarily locking after accurate alignment of pushing, simultaneously completing the steel beam small section of the corresponding section by pushing, installing a welding platform and a protective shed at the folding position between the steel beam small sections, welding beam section butt welding seams, detecting and detecting, and then obtaining a steel beam large section.
After the completion of the large section of the steel beam, it is necessary to rotate the large section of the steel beam horizontally to a predetermined position. Optionally, before the horizontal rotation, a horizontal rotation supporting leg, an upper rotating disc, a rotating shaft and the like for realizing the horizontal rotation of the large-section beam body of the horizontal rotation steel beam are installed on the horizontal rotation rotating disc, and the beam body is dropped onto the horizontal rotation supporting leg through a pushing device. The beam section is rotated horizontally by adopting a leveling rotation mode of a central rotating shaft-supporting leg ring, traction equipment, various sensors and the like are installed, and the adjustment of a horizontal rotation turntable is completed; in addition, a limiting device is placed at the position of the steel beam large section on the flat turning turntable, and a rubber cushion block is placed in front of the limiting device to serve as a buffer device; carrying out trial rotation on a large section of the steel beam to detect whether each system is normal or not in horizontal rotation; starting the continuous traction jack, and pulling the large steel beam section to rotate; after the steel beam is accurately rotated in place, the large section of the steel beam is temporarily placed on the rotary table, and the locking structure on the locking pier structure is anchored and locked.
After the anchoring and locking of the large steel beam section are completed, in order to facilitate the installation of other steel beam subsections, a temporary transportation channel is built on the large steel beam section, the steel beam subsections are transported to an installation position through the temporary transportation channel, the steel beam subsections are connected with the side span ends of the large steel beam section, the folding of the middle span and other sections of the bridge is realized, the whole bridge is built, the side span ends of the large steel beam section are locked on the locking piers, and the specific functions of the transportation channel are detailed in the foregoing and are not repeated.
In conclusion, the steel hanging box that this application provided includes following beneficial effect:
the installation system of the steel truss girder bridge comprises a temporary buttress mechanism, a main pier and a plurality of steel girder small sections, wherein the temporary buttress mechanism is used for placing the steel girder small sections and pushing the steel girder small sections to preset positions on the tops of the main piers so that the two steel girder small sections are folded to obtain a steel girder large section; the horizontal rotation turntable mechanism comprises a horizontal rotation turntable which is arranged on the top of the main pier and is used for horizontally rotating the large steel beam section to a preset position; and the locking pier structure is provided with a locking structure for locking the side span end of the large section of the steel beam at the preset position. This application has realized prefabricating the girder steel large segment in the mill, has guaranteed the construction quality of the girder steel large segment, reduces the influence of site operation technology to girder structure atress, has also improved the present efficiency of construction simultaneously, only need be with the girder steel segment by low level jacking to elevation position at the job site, and the top pushes away the translation, through the flat carousel with the girder steel large segment translation to design position, the integral erection of girder steel large segment has been realized. Meanwhile, the temporary buttress mechanism and the locking pier structure are arranged, so that the occupation of roads and navigation channels under the bridge is avoided, and the passage of the roads and the navigation channels under the bridge is not obstructed in the bridge construction process.
The installation system of steel truss girder bridge that this application embodiment provided sets up a plurality ofly respectively in the same direction as the bridge to both sides interim buttress mechanism include interim buttress, set up in displacement device on the interim buttress. The displacement device comprises a jacking device and a pushing device. The temporary buttress is a steel platform structure, the steel platform structure include the steel-pipe pile, and set up in steel platform on the steel-pipe pile, between the steel-pipe pile and be provided with spandrel girder and auxiliary beam under the steel platform, and then when carrying out girder steel subsection top pushing, can realize the continuous top of multiple spot and push away for girder steel subsection can steadily, fast, accurate propelling movement to the preset position department on the main pier top.
The embodiment of the application provides a mounting system of steel truss girder bridge, the flat turn carousel mechanism still includes the supplementary mound structure of flat turn, the supplementary mound structure of flat turn is located at the bottom of the biggest cantilever end beam of flat turn carousel. The horizontal rotation auxiliary pier structure is a steel pipe pile support structure and comprises a steel pipe pile foundation, stand columns connected with the steel pipe pile foundation and a horizontal connection arranged between two opposite stand columns. When the large steel beam segment is flatly rotated, the safe flatly-rotating auxiliary pier structure is arranged through the large steel beam segment, the large steel beam segment is flatly rotated to the preset position in multiple steps, the large steel beam segment is flatly rotated to the preset position accurately, and the flatly-rotating accuracy of the large steel beam segment is improved.
The utility model provides a mounting system of steel truss girder bridge, locking structure be to the large section of girder steel's side span end provides the anchor structure of vertical locking power, guarantees that the large section of girder steel that the translation target in place can both be located the position of design before whole bridge folds, avoids the large section of girder steel to appear the situation of collapsing when the atress is inhomogeneous simultaneously.
The foregoing is only a partial embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A mounting system for a steel truss girder bridge, comprising:
the temporary buttress mechanism is used for placing the small steel beam sections and pushing the small steel beam sections to preset positions on the top of the main pier so as to enable the two small steel beam sections to be folded to obtain large steel beam sections;
the horizontal rotation turntable mechanism comprises a horizontal rotation turntable which is arranged on the top of the main pier and is used for horizontally rotating the large steel beam section to a preset position;
and the locking pier structure is provided with a locking structure for locking the side span end of the large section of the steel beam at the preset position.
2. The mounting system of a steel truss girder bridge as claimed in claim 1, wherein the temporary buttress mechanism includes a temporary buttress, a displacement device provided on the temporary buttress.
3. The mounting system of a steel truss girder bridge as defined in claim 2, wherein the displacement means includes a jacking means and a pushing means.
4. The installation system of a steel truss girder bridge as claimed in claim 2, wherein the temporary buttress is a steel platform structure, the steel platform structure includes steel pipe piles, and steel platforms disposed on the steel pipe piles, and load-bearing beams and auxiliary beams are disposed between the steel pipe piles and under the steel platforms.
5. The mounting system of the steel truss girder bridge of claim 4, wherein the load bearing beams and the auxiliary beams are made of section steel.
6. The mounting system for a steel truss girder bridge as defined in claim 1, wherein said pan swivel turntable mechanism further includes a pan swivel auxiliary pier structure located at the most cantilevered end sill of said pan swivel.
7. The mounting system of a steel truss girder bridge according to claim 6, wherein the horizontal rotation auxiliary pier structure is a steel pipe pile support structure including a steel pipe pile foundation, a vertical column connected to the steel pipe pile foundation, and a horizontal connection provided between two opposite vertical columns.
8. The mounting system of a steel truss girder bridge as claimed in claim 1, wherein the locking structure is an anchoring structure providing a vertical locking force to an end span of the steel girder large section.
9. The mounting system of the steel truss girder bridge of claim 8, wherein the locking pier structure is a steel pipe pile support structure, and comprises a steel pipe pile foundation, an upright post connected with the steel pipe pile foundation, and a parallel connection arranged between two opposite upright posts, and a bearing beam is further arranged between the upright posts.
10. The mounting system of the steel truss girder bridge as claimed in claim 1, further comprising a transportation passage provided on the steel girder large section for transporting the steel girder sub-section.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010839083.9A CN111809529A (en) | 2020-08-19 | 2020-08-19 | Mounting system of steel truss girder bridge |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010839083.9A CN111809529A (en) | 2020-08-19 | 2020-08-19 | Mounting system of steel truss girder bridge |
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| CN111809529A true CN111809529A (en) | 2020-10-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113605255A (en) * | 2021-09-17 | 2021-11-05 | 中国铁建大桥工程局集团有限公司 | Rapid construction method for steel truss and steel box combined beam bridge in offshore height-limiting and navigation-limiting area |
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2020
- 2020-08-19 CN CN202010839083.9A patent/CN111809529A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113605255A (en) * | 2021-09-17 | 2021-11-05 | 中国铁建大桥工程局集团有限公司 | Rapid construction method for steel truss and steel box combined beam bridge in offshore height-limiting and navigation-limiting area |
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