CN115821767A - Construction method for manufacturing large section of steel truss girder of suspension bridge - Google Patents
Construction method for manufacturing large section of steel truss girder of suspension bridge Download PDFInfo
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Abstract
The embodiment of the disclosure relates to a method for manufacturing and constructing a large section of a steel truss girder of a suspension bridge. The method comprises the following steps: laying longitudinal and transverse base lines on the hardened ground, and manufacturing a jig frame according to the longitudinal and transverse base lines; the longitudinal and transverse base lines comprise a transverse base line and a longitudinal base line, the transverse base line and the longitudinal base line are in a cross shape, and the jig frame is suitable for manufacturing a large section of the steel truss girder of the suspension bridge; assembling a lower parallel connection on the jig frame, and sequentially arranging a main transverse truss web member unit and a main truss web member unit on the lower parallel connection for assembling; wherein, the lower parallel connection comprises: the main truss lower chord unit, the main cross truss lower chord unit and the horizontal link rod unit are connected with the horizontal link rod unit; and arranging a plurality of prefabricated bridge panels on the main transverse truss web member unit and the main truss web member unit for assembling. By the method, the total splicing of the steel truss girder is realized, and the method has the advantages of reliable total splicing process, stable splicing quality, simple operation and high assembly precision.
Description
Technical Field
The embodiment of the disclosure relates to the technical field of steel bridge installation engineering, in particular to a manufacturing and construction method for a large section of a steel truss girder of a suspension bridge.
Background
Along with the vigorous development of road traffic infrastructure construction in China, suspension bridge steel truss bridges are more and more widely used in places such as Yun Guichuan, and the like, and the manufacturing research of the steel truss bridges is rapidly developed to meet the requirement of hoisting large sections of the steel truss bridge suspension bridges.
In the related technology, the bridge site needs to carry out the total assembly on the bridge deck block, the upper chord member, the lower chord member, the diagonal web members, the vertical web members and the horizontal link members, but in the total assembly process, the problems of unreliable assembly process, unstable assembly quality, inconvenient operation and low assembly precision exist.
Accordingly, there is a need to ameliorate one or more of the problems with the above-mentioned related art solutions.
It is noted that this section is intended to provide a background or context to the disclosure as recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.
Disclosure of Invention
An object of the disclosed embodiments is to provide a construction method for manufacturing a large section of a steel girder of a suspension bridge, thereby overcoming, at least to some extent, one or more of the problems due to the limitations and disadvantages of the related art.
According to the embodiment of the disclosure, a construction method for manufacturing a large section of a steel truss girder of a suspension bridge comprises the following steps:
laying longitudinal and transverse base lines on a hardened ground, and manufacturing a jig frame according to the longitudinal and transverse base lines; the longitudinal and transverse base lines comprise a transverse base line and a longitudinal base line, the transverse base line and the longitudinal base line are crossed, and the jig frame is suitable for manufacturing the large sections of the suspension bridge steel truss girder;
assembling a lower horizontal connection on the jig frame, and sequentially arranging a main transverse truss web member unit and a main truss web member unit on the lower horizontal connection for assembling; wherein the lower parallel connection comprises: the main truss lower chord unit, the main transverse truss lower chord unit and the horizontal link rod unit are arranged in parallel; the main truss lower chord member unit is formed by sequentially splicing a plurality of main truss lower chord members, the main transverse truss web member unit is formed by sequentially splicing a plurality of main transverse truss web members, and the main truss web member unit is formed by sequentially splicing a plurality of main truss web members;
and arranging a plurality of prefabricated bridge decks on the main transverse truss web member unit and the main truss web member unit for assembling.
In an embodiment of the present disclosure, the step of laying a longitudinal and transverse base line on a hardened ground and manufacturing a jig frame according to the longitudinal and transverse base line includes:
arranging a plurality of arrangement lines according to the longitudinal and transverse base lines, wherein each arrangement line is used for arranging an upright post; the height of the upright columns on the two sides is smaller than that of the upright column in the middle, each upright column comprises a main body, a top plate and a bottom plate, the top plate is located at the top of the main body, and the bottom plate is located at the bottom of the main body.
In an embodiment of the disclosure, positioning bolt holes are respectively arranged on each top plate according to the longitudinal and transverse base lines, and the positioning bolt holes are used for positioning the lower parallel connection punching pins.
In one embodiment of the disclosure, when the lower parallel connection is assembled on the jig frame, according to a first preset installation sequence, the lower chord unit of the main truss positioned on one side is installed firstly, and is positioned to the positioning bolt hole on the top plate positioned below the lower chord unit by using a punching nail; the first preset installation sequence is from left to right or from right to left.
In an embodiment of the present disclosure, when the lower parallel connection is assembled on the jig frame, the step of firstly installing the main truss lower chord unit located on one side according to a first preset installation sequence, and positioning the main truss lower chord unit to the positioning bolt hole on the top plate located below the main truss lower chord unit by using the punching nail includes:
bolting the main transverse truss lower chord unit and the main truss lower chord unit, and positioning the main transverse truss lower chord unit and the main truss lower chord unit to a positioning bolt hole on the top plate below the main transverse truss lower chord unit by using a punching nail; the main transverse truss lower chord unit is formed by splicing a plurality of main transverse truss lower chords;
and then the horizontal link rod unit and the main transverse truss lower chord unit are bolted and fixed, and then the main truss lower chord unit positioned on the other side is installed.
In an embodiment of the present disclosure, the step of assembling the plurality of prefabricated bridge decks on the main cross truss web member unit and the main truss web member unit includes:
according to a second preset installation sequence, bolting and fixing each prefabricated bridge deck with the main transverse truss web member units and the main truss web member units; and the second preset installation sequence is from the middle to two sides, and the adjacent prefabricated bridge panels are fixed by welding.
In an embodiment of the present disclosure, the step of laying the longitudinal and transverse base lines on the hardened ground and manufacturing the jig frame according to the longitudinal and transverse base lines includes:
and re-testing the jig frame, and assembling the lower parallel connection on the jig frame after the jig frame is detected to be qualified.
In an embodiment of the disclosure, after the jig frame is manufactured, a settlement monitoring point is arranged on the jig frame and used for monitoring whether the jig frame is settled or deformed along with the increase of the assembling weight on the jig frame.
In an embodiment of the present disclosure, after the step of assembling the lower parallel connection on the jig frame, the method further includes:
and after the lower parallel connection assembly is completed, measuring the diagonal line of the lower parallel connection, the distance between the lower chord units of the main truss, the distance between the lower chord units of the main transverse truss and the planeness of the lower parallel connection.
In an embodiment of the present disclosure, the alignment precision of the positioning key hole satisfies f 1 ≤2mm。
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
in the embodiment of the disclosure, by the method, the bed-jig suitable for manufacturing the large section of the steel truss girder of the suspension bridge is manufactured according to the longitudinal and transverse base lines on the hardened ground, then the lower parallel connection is spliced on the bed-jig, the web member unit of the main transverse truss and the web member unit of the main truss are arranged on the lower parallel connection, and finally the prefabricated bridge decks are spliced on the web member unit of the main transverse truss and the web member unit of the main truss, so that the total splicing of the steel truss girder is realized. By the method, the total splicing process is reliable, the splicing quality is stable, the operation is simple, and the assembly precision is high.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.
FIG. 1 illustrates a flow chart of steps of a construction method for manufacturing a large section of a steel truss girder of a suspension bridge in an exemplary embodiment of the present disclosure;
FIG. 2 shows a top view of a total split jig frame with a lower parallel link in an exemplary embodiment of the disclosure;
FIG. 3 illustrates a front view of a total split jig frame in an exemplary embodiment of the present disclosure;
FIG. 4 shows a schematic view of a split lower parallel in an exemplary embodiment of the present disclosure;
fig. 5 shows a schematic view of a sectional main truss web element in an exemplary embodiment of the disclosure;
FIG. 6 shows a schematic view of a sectional main cross truss web element in an exemplary embodiment of the present disclosure;
FIG. 7 shows a schematic view of a fabricated bridge deck assembled in the middle in an exemplary embodiment of the present disclosure;
fig. 8 shows a schematic view of assembling prefabricated bridge deck panels on both sides in an exemplary embodiment of the present disclosure.
In the figure: 100. a jig frame; 110. a column; 120. a top plate; 200. lower parallel connection; 210. a main truss lower chord unit; 220. a main cross truss lower chord unit; 230. a flat link rod unit; 300. a main cross truss web member unit; 400. a main truss web member unit; 500. prefabricating a bridge deck; 600. a transverse baseline; 700. a longitudinal baseline.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Furthermore, the drawings are merely schematic illustrations of embodiments of the disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and a repetitive description thereof will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities.
The embodiment of the example firstly provides a construction method for manufacturing a large section of a steel truss girder of a suspension bridge. Referring to fig. 1, the method may include:
step S101: laying longitudinal and transverse base lines on a hardened ground, and manufacturing a jig frame 100 according to the longitudinal and transverse base lines; the longitudinal and transverse base lines comprise a transverse base line 600 and a longitudinal base line 700, the transverse base line 600 and the longitudinal base line 700 are crossed, and the jig 100 is a jig 100 suitable for manufacturing a large section of the suspension bridge steel truss girder;
step S102: assembling a lower horizontal connector 200 on the jig frame 100, and sequentially arranging a main transverse truss web member unit 300 and a main truss web member unit 400 on the lower horizontal connector 200 for assembling; wherein the lower parallel link 200 comprises: main truss lower chord unit 210, main cross truss lower chord unit 220, and tie rod unit 230; the main truss lower chord unit 210 is formed by sequentially assembling a plurality of main truss lower chords, the main cross truss web member unit 300 is formed by sequentially assembling a plurality of main cross truss web members, and the main truss web member unit 400 is formed by sequentially assembling a plurality of main truss web members.
Step S103: a plurality of prefabricated bridge deck boards 500 are arranged on the main transverse truss web member unit 300 and the main truss web member unit 400 for splicing.
By the method, the bed-jig 100 suitable for manufacturing the large sections of the steel trussed beams of the suspension bridge is manufactured according to the longitudinal and transverse base lines on the hardened ground, then the lower horizontal connection 200 is spliced on the bed-jig 100, the main transverse truss web member unit 300 and the main truss web member unit 400 are arranged on the lower horizontal connection 200, and finally the prefabricated bridge deck plates 500 are spliced on the main transverse truss web member unit 300 and the main truss web member unit 400, so that the total splicing of the steel trussed beams is realized. By the method, the total splicing process is reliable, the splicing quality is stable, the operation is simple, and the assembly precision is high.
Next, the parts of the construction method for manufacturing a large section of a steel girder of a suspension bridge according to the exemplary embodiment will be described in more detail with reference to fig. 1 to 8.
In step S101, a longitudinal and transverse base line is laid on a hardened ground, and a jig 100 is manufactured according to the longitudinal and transverse base line; the longitudinal and transverse base lines comprise a transverse base line 600 and a longitudinal base line 700, the transverse base line 600 and the longitudinal base line 700 are crossed, and the jig 100 is a jig 100 suitable for manufacturing a large section of the suspension bridge steel truss girder. Specifically, as shown in fig. 2, when the jig 100 is manufactured, the ground is hardened, and after the ground is hardened, the transverse base line 600 and the longitudinal base line 700 are laid on the hardened ground, and the transverse base line 600 and the longitudinal base line 700 are crossed to form a longitudinal base line and a transverse base line, so that the jig 100 suitable for manufacturing the suspension bridge steel truss girder large section is manufactured. Wherein, lofting guarantee precision f of longitudinal and transverse baselines 2 ≤2mm。
In one embodiment, the step of laying a longitudinal and transverse base line on the hardened ground and manufacturing the jig frame 100 according to the longitudinal and transverse base line comprises:
arranging a plurality of arrangement lines according to the longitudinal and transverse base lines, wherein each arrangement line is used for arranging the upright 110; the height of the upright posts 110 on the two sides is smaller than that of the upright post 110 in the middle, the upright posts 110 include a main body, a top plate 120 and a bottom plate, the top plate 120 is located at the top of the main body, and the bottom plate is located at the bottom of the main body. Specifically, a plurality of arrangement lines are arranged according to longitudinal and transverse base lines arranged on the hardened ground, then the upright 110 is arranged on the hardened ground according to the arrangement lines, and further, the upright 110 is fixed on the hardened ground by adopting a chemical anchor. It should be noted that, as shown in fig. 3, the jig frame 100 is mainly composed of upright columns 110 with different heights, each upright column 110 includes a main body, a top plate 120 located at the top of the main body, and a bottom plate located at the bottom of the upright column 110, further, the main body of the upright column 110 is composed of 4H 200 × 150mm section steels, the top plate 120 and the bottom plate respectively adopt two square steel plates with different specifications, the specific specification of the top plate 120 and the specific specification of the bottom plate can be selected according to actual situations, and the present embodiment does not limit this. The upright 110 should be arranged at the position of the partition board of the subsequent lower parallel link 200 or the position with higher rigidity of the lower parallel link 200, so as to ensure that the lower parallel link 200 does not generate local deformation. The height of the upright columns 110 on the two sides is smaller than that of the upright column 110 in the middle, and the heights of the upright columns 110 on the two sides and the upright column 110 in the middle can meet the condition of ensuring the normal running of the girder transporting vehicle, and can be specifically set according to the actual situation, and the embodiment does not limit the condition.
It should be noted that, in order to ensure that no settlement occurs during the assembly process, the foundation of the jig frame 100 must have sufficient bearing capacity, the foundation bearing capacity of the jig frame 100 is greater than 200kpa, and the jig frame 100 must have sufficient rigidity to avoid deformation during the use. The strength, rigidity and stability of the tire type design meet the construction requirements, so that the structural design of the manufactured tire frame 100 is compact, and the stability and rigidity meet the requirements.
In step S102, a lower horizontal link 200 is assembled on the jig 100, and a main transverse truss web member unit 300 and a main truss web member unit 400 are sequentially arranged on the lower horizontal link 200 for assembly; wherein the lower parallel link 200 includes: main truss lower chord unit 210, main cross truss lower chord unit 220, and tie rod unit 230; the main truss lower chord unit 210 is formed by sequentially assembling a plurality of main truss lower chords, the main cross truss web member unit 300 is formed by sequentially assembling a plurality of main cross truss web members, and the main truss web member unit 400 is formed by sequentially assembling a plurality of main truss web members. Specifically, after the jig 100 is manufactured, the lower parallel connection 200 is assembled on the jig 100, and after the lower parallel connection 200 is assembled, as shown in fig. 2, 4, 5, and 6, the main transverse truss web member unit 300 and the main truss web member unit 400 are sequentially assembled on the lower parallel connection 200, and further, the assembly is detected strictly according to the assembly requirements of the members. The main truss lower chord unit 210 is formed by sequentially splicing a plurality of main truss lower chords, the flat link units 230 are formed by sequentially splicing a plurality of right flat links, the main cross-truss web member unit 300 is formed by sequentially splicing a plurality of main cross-truss web members, and the main truss web member unit 400 is formed by sequentially splicing a plurality of main truss web members. The number of the main truss bottom chord members, the number of the flat link members, the number of the main cross truss web members, and the number of the main truss web members may be set according to actual conditions, and this embodiment is not limited thereto.
In step S103, several prefabricated bridge decks 500 are installed on the main cross truss web member unit 300 and the main truss web member unit 400 for assembly. Specifically, as shown in fig. 7 and 8, after the main cross truss web member unit 300 and the main truss web member unit 400 are assembled to the lower horizontal coupling 200, a plurality of prefabricated bridge decks 500 are installed on the main cross truss web member unit 300 and the main truss web member unit 400 again, and then the assembly is performed. The prefabricated bridge deck 500 is a deck made of concrete in advance.
Optionally, in some embodiments, a positioning bolt hole is respectively arranged on each top plate 120 according to the longitudinal and transverse base lines, and the positioning bolt hole is used for positioning the lower parallel connection 200 punching pin. Specifically, the top plate 120 of each upright post 110 is provided with a positioning bolt hole for positioning the punching pin of the lower parallel connection 200, so as to control the position of the assembled lower parallel connection 200.
In one embodiment, the alignment accuracy of the positioning key holes satisfies f 1 Is less than or equal to 2mm. Specifically, the alignment precision of the positioning bolt hole meets f 1 Less than or equal to 2mm, the alignment of the positioning bolt hole meets the condition well, so that the subsequent positioning by utilizing the positioning bolt hole is more accurate.
Optionally, in some embodiments, when the lower parallel link 200 is assembled on the jig frame 100, according to a first preset assembly sequence, the main truss lower chord unit 210 on one side is firstly assembled and is positioned to the positioning bolt hole on the top plate 120 below the main truss lower chord unit by using a punching nail; the first preset installation sequence is from left to right or from right to left. Specifically, as shown in fig. 2, the lower parallel link 200 includes a main truss lower chord unit 210, a main cross-truss lower chord unit 220, and a parallel link unit 230. When the lower parallel connection 200 needs to be assembled on the jig frame 100, according to a first preset installation sequence, the main boom lower chord unit 210 on one side is first installed on the jig frame 100, specifically, the main boom lower chord unit 210 on one side is positioned to the positioning bolt hole on the top plate 120 below the main boom lower chord unit 210 by using a punch nail, so as to fix the main boom lower chord unit 210 on one side to the jig frame 100.
It should be noted that the first preset installation order is from left to right or from right to left. Can prevent that the concatenation when unordered installation is improper, avoid causing and assemble not smoothly. When the first preset installation sequence is from left to right, the main truss lower chord unit 210 on the left side is installed on the jig 100, and the main truss lower chord unit 210 on the left side is positioned on the positioning bolt hole on the top plate 120 below the main truss lower chord unit 210 by using a punching nail, so that the main truss lower chord unit 210 on the left side is fixed on the jig 100; when the first preset installation sequence is from right to left, the main boom lower chord unit 210 on the right side is installed on the jig 100 first, and the main boom lower chord unit 210 on the right side is positioned to the positioning bolt hole on the top plate 120 below the main boom lower chord unit 210 by using a punching nail, so that the main boom lower chord unit 210 on the right side is fixed on the jig 100.
Optionally, in some embodiments, the step of installing the main truss lower chord unit 210 on one side in a first preset installation sequence when assembling the lower parallel connection 200 on the jig frame 100 and positioning the main truss lower chord unit to the positioning bolt hole on the top plate 120 below the main truss lower chord unit by using the punching nail comprises the following steps:
bolting the main cross-truss lower chord unit 220 and the main truss lower chord unit 210, and positioning the main cross-truss lower chord unit to a positioning bolt hole on the top plate 120 positioned below the main cross-truss lower chord unit by using a punching nail; the main cross truss lower chord unit 220 is formed by splicing a plurality of main cross truss lower chords;
the tie rod units 230 are bolted and fixed to the main cross-truss lower chord unit 220, and then the main truss lower chord unit 210 located on the other side is installed.
Specifically, as shown in fig. 2, 4, 5 and 6, when the lower parallel connection 200 is assembled on the jig 100, according to a first preset installation sequence, after the main truss lower chord unit 210 on one side is positioned to the positioning bolt hole on the top plate 120 below the main truss lower chord unit 210 by using a punching nail, the main cross truss lower chord unit 220 is bolted to the main truss lower chord unit 210, and the main cross truss lower chord unit 220 is positioned to the positioning bolt hole on the top plate 120 below the main cross truss lower chord unit 220 by using a punching nail, so that the main cross truss lower chord unit 220 is fixed to the jig 100; the main cross-truss lower chord unit 220 is formed by splicing a plurality of main cross-truss lower chords, the number of the main cross-truss lower chords can be set according to actual conditions, and the embodiment does not limit the number of the main cross-truss lower chords.
Optionally, in some embodiments, the step of assembling the plurality of prefabricated bridge panels 500 on the main cross truss web member 300 and the main truss web member 400 includes:
according to a second preset installation sequence, bolting and fixing each prefabricated bridge deck 500 with the main transverse truss web member unit 300 and the main truss web member unit 400; the second preset installation sequence is from the middle to both sides, and the adjacent prefabricated bridge deck panels 500 are fixed by welding. Specifically, as shown in fig. 7 and 8, in the process of installing the prefabricated bridge panels 500 on the truss web member units and the main truss web member units 400 for assembly, according to a second predetermined installation sequence, the prefabricated bridge panel 500 in the middle is bolted and fixed with the main cross truss web member unit 300 and the main truss web member unit 400 below the prefabricated bridge panel 500 in the middle, and then the prefabricated bridge panels 500 on both sides are bolted and fixed with the main cross truss web member unit 300 and the main truss web member unit 400 below the prefabricated bridge panels 500 on both sides. It should be noted that a preset gap is preset between the adjacent prefabricated bridge deck panels 500, and the preset gap is used for welding, so that the adjacent prefabricated bridge deck panels 500 are fixed by welding.
Optionally, in some embodiments, the step of laying a longitudinal and transverse base line on the hardened ground and manufacturing the jig frame 100 according to the longitudinal and transverse base line includes:
and (4) retesting the jig frame 100, and assembling the lower parallel connection 200 on the jig frame 100 after the jig frame 100 is detected to be qualified. Specifically, after the jig 100 is manufactured according to the longitudinal and transverse base lines on the hardened ground, the manufactured jig 100 needs to be retested, and after the test is qualified, the next step is performed.
After the jig 100 is manufactured, the jig 100 is provided with a vertical and horizontal base line of the jig 100 and a reference point of the jig 100 to control the position of the assembled integral member and ensure the dimensions of each part. Auxiliary facilities such as measuring points and landmarks which are not influenced by other factors are arranged outside the jig frame 100 and are used for monitoring control points of the assembling rod pieces in the assembling process. The assembled components include a lower flat coupling 200 (the lower flat coupling 200 includes a main truss lower chord unit 210, a main cross truss lower chord unit 220 and a flat link unit 230), a main cross truss web member unit 300, a main truss web member unit 400 and a prefabricated bridge deck 500.
Optionally, in some embodiments, after the jig 100 is manufactured, a settlement monitoring point is disposed on the jig 100, and is used for monitoring whether the jig 100 settles or deforms as the assembly weight on the jig 100 increases. Specifically, when the jig 100 is manufactured according to the longitudinal and lateral base lines on the hardened ground and retested to be qualified, the jig 100 may be settled or deformed as the weight of the jig 100 increases in the process of assembling the lower link, the main cross-truss web member unit 300, the main truss web member unit 400, and the prefabricated bridge deck 500 on the jig 100. Therefore, after the jig frame 100 is manufactured, settlement monitoring points need to be arranged on the jig frame 100, marks are made, the height difference between the settlement monitoring points and the leveling points is recorded, whether the jig frame 100 settles or deforms or not along with the increase of the assembling weight is monitored at any time in the whole segment assembling process, and real and accurate monitoring data are provided for the assembling quality.
Optionally, in some embodiments, after the step of assembling the lower parallel link 200 on the jig frame 100, the method further includes:
after the lower parallel connection 200 is assembled, the diagonal line of the lower parallel connection 200, the distance between the main truss lower chord units 210, the distance between the main cross truss lower chord units 220 and the flatness of the lower parallel connection 200 are measured. Specifically, after the lower parallel connection 200 is assembled on the jig 100, the diagonal line of the lower parallel connection 200, the distance between the main truss lower chord units 210, the distance between the main cross truss lower chord units 220, and the flatness of the lower parallel connection 200 need to be measured, so that the lower parallel connection 200 is assembled to be qualified, and is convenient for the subsequent processes.
It should be noted that each round of assembling process is as follows: the lower horizontal coupling 200 is assembled on the jig 100, the main transverse truss web member unit 300 and the main truss web member unit 400 are sequentially arranged on the lower horizontal coupling 200 for assembly, and the prefabricated bridge panels 500 are assembled on the main transverse truss web member unit 300 and the main truss web member unit 400. After each round of assembly is completed, the jig frame 100 is detected again, detection records are made, and the assembly of the next round can be performed after the qualification is confirmed. When each round of assembly is carried out by using the method, the assembly sequence is reasonable, and the detection control item points meet the standard requirements. The method ensures the width, height and verticality of the steel truss girder total assembled truss, the diagonal precision of the bridge deck system and the total assembled elevation of the bridge deck, has strong practicability, is convenient for workers to master skilled operation, and can reach the design standard of a bridge through detection after the steel truss girder is totally assembled.
It is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like in the foregoing description are used for indicating or indicating the orientation or positional relationship illustrated in the drawings, merely for the convenience of describing the disclosed embodiments and for simplifying the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and therefore should not be considered limiting of the disclosed embodiments.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present disclosure, "a plurality" means two or more unless specifically limited otherwise.
In the embodiments of the present disclosure, unless otherwise specifically stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present disclosure can be understood by those of ordinary skill in the art as appropriate.
In the embodiments of the present disclosure, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or may comprise the first and second features being in contact, not directly, but via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by one skilled in the art.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
Claims (10)
1. A construction method for manufacturing a large section of a steel truss girder of a suspension bridge is characterized by comprising the following steps:
laying longitudinal and transverse base lines on a hardened ground, and manufacturing a jig frame according to the longitudinal and transverse base lines; the longitudinal and transverse base lines comprise a transverse base line and a longitudinal base line, the transverse base line and the longitudinal base line are crossed, and the jig frame is suitable for manufacturing the large sections of the suspension bridge steel truss girder;
assembling a lower horizontal connection on the jig frame, and sequentially arranging a main transverse truss web member unit and a main truss web member unit on the lower horizontal connection for assembling; wherein the lower parallel connection comprises: the main truss lower chord unit, the main cross truss lower chord unit and the horizontal link rod unit are connected with the horizontal link rod unit; the main truss lower chord unit is formed by sequentially assembling a plurality of main truss lower chords, the main transverse truss web member unit is formed by sequentially assembling a plurality of main transverse truss web members, and the main truss web member unit is formed by sequentially assembling a plurality of main truss web members;
and arranging a plurality of prefabricated bridge decks on the main transverse truss web member unit and the main truss web member unit for assembling.
2. The method for constructing the large section of the steel truss girder of the suspension bridge as claimed in claim 1, wherein the step of laying the longitudinal and transverse base lines on the hardened ground and manufacturing the jig frame according to the longitudinal and transverse base lines comprises:
arranging a plurality of arrangement lines according to the longitudinal and transverse base lines, wherein each arrangement line is used for arranging an upright post; the height of the upright columns on the two sides is smaller than that of the upright column in the middle, each upright column comprises a main body, a top plate and a bottom plate, the top plate is located at the top of the main body, and the bottom plate is located at the bottom of the main body.
3. The method for manufacturing and constructing the large section of the steel truss girder of the suspension bridge as claimed in claim 2, wherein positioning bolt holes are respectively arranged on each top plate according to the longitudinal and transverse base lines, and the positioning bolt holes are used for positioning the lower parallel connection punching nails.
4. The method for manufacturing and constructing the large section of the steel truss girder of the suspension bridge according to claim 3, wherein when the lower parallel connection is assembled on the jig frame, the lower chord unit of the main truss on one side is firstly installed according to a first preset installation sequence, and is positioned to the positioning bolt hole on the top plate below the lower chord unit by using the punching nail; the first preset installation sequence is from left to right or from right to left.
5. The method for manufacturing and constructing the large section of the steel truss girder of the suspension bridge according to claim 4, wherein the step of firstly installing the main truss lower chord unit at one side and positioning the main truss lower chord unit to the positioning bolt hole on the top plate below the main truss lower chord unit by using the punching nail when the lower parallel connection is assembled on the jig frame according to a first preset installation sequence comprises the following steps:
bolting the main transverse truss lower chord unit and the main truss lower chord unit, and positioning the main transverse truss lower chord unit and the main truss lower chord unit to a positioning bolt hole on the top plate below the main transverse truss lower chord unit by using a punching nail; the main transverse truss lower chord unit is formed by splicing a plurality of main transverse truss lower chords;
and then the horizontal link rod unit and the main transverse truss lower chord unit are bolted and fixed, and then the main truss lower chord unit positioned on the other side is installed.
6. The method for manufacturing and constructing the large section of the steel truss girder of the suspension bridge according to claim 1, wherein the step of arranging a plurality of prefabricated bridge deck plates on the main transverse truss web member and the main truss web member for assembling comprises the following steps:
according to a second preset installation sequence, bolting and fixing each prefabricated bridge deck with the main transverse truss web member units and the main truss web member units; and the second preset installation sequence is from the middle to two sides, and the adjacent prefabricated bridge panels are fixed by welding.
7. The method for constructing the large section of the steel truss girder of the suspension bridge according to claim 1, wherein the step of laying the longitudinal and transverse base lines on the hardened ground and manufacturing the jig frame according to the longitudinal and transverse base lines comprises the following steps:
and re-testing the jig frame, and assembling the lower parallel connection on the jig frame after the jig frame is detected to be qualified.
8. The method for manufacturing and constructing the large section of the steel truss girder of the suspension bridge according to claim 1, wherein after the jig frame is manufactured, a settlement monitoring point is arranged on the jig frame and used for monitoring whether the jig frame settles or deforms along with the increase of the assembling weight on the jig frame.
9. The method for manufacturing and constructing the large section of the steel truss girder of the suspension bridge according to claim 1, wherein the step of assembling the lower parallel connection on the jig frame further comprises the following steps:
after the lower parallel connection is assembled, measuring the diagonal lines of the lower parallel connection, the distance between the lower chord units of the main truss, the distance between the lower chord units of the main transverse truss and the planeness of the lower parallel connection.
10. The method for manufacturing and constructing the large section of the steel truss girder of the suspension bridge according to claim 3, wherein the alignment precision of the positioning bolt holes satisfies f 1 ≤2mm。
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211471568.2A CN115821767A (en) | 2022-11-23 | 2022-11-23 | Construction method for manufacturing large section of steel truss girder of suspension bridge |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211471568.2A CN115821767A (en) | 2022-11-23 | 2022-11-23 | Construction method for manufacturing large section of steel truss girder of suspension bridge |
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