阅读说明：本技术 一种钢管拱桥拱肋合龙结构及合龙方法 (Steel pipe arch bridge arch rib closure structure and closure method ) 是由 刘志燕 邓玉平 刘润泽 宋小三 赵小静 黄亮 高双剑 郑光 刘亦奇 谌博 涂满明 于 2021-07-06 设计创作，主要内容包括：本申请涉及一种钢管拱桥拱肋合龙结构及合龙方法,涉及钢管拱桥拱肋施工领域,包括两组钢管拱肋,每组钢管拱肋包括两组在竖直方向排布的弦杆,两组弦杆之间设有连接杆件,两组钢管拱肋的端部间隔并形成合龙口；至少一个搭接连接件,其两端分别连接两侧钢管拱肋的对应弦杆；至少一个限位组件,装设在弦杆上并用以限位搭接连接件端部；合龙段拱肋,两端分别连接于两组钢管拱肋的端部。合龙口的施工时可通过搭接连接件以及限位组件的快速定位配合,使得两侧钢管拱肋的对应弦杆可得到快速对准,进而使两者之间形成的合龙口得到快速调整至合适位置,并在连接搭接连接件与两侧钢管拱肋的弦杆后即实现合龙口的锁定,后续即可快速进行合龙段的安装。(The application relates to a closure structure and a closure method for steel pipe arch bridge arch ribs, which relate to the field of steel pipe arch bridge arch rib construction and comprise two groups of steel pipe arch ribs, wherein each group of steel pipe arch ribs comprises two groups of chords which are arranged in the vertical direction, a connecting rod piece is arranged between the two groups of chords, and the end parts of the two groups of steel pipe arch ribs are spaced to form closure openings; at least one lap joint connecting piece, two ends of which are respectively connected with corresponding chords of the steel pipe arch ribs on two sides; at least one limiting component which is arranged on the chord member and is used for limiting the end part of the lap joint connecting piece; and two ends of the closure section arch rib are respectively connected with the end parts of the two groups of steel pipe arch ribs. The quick location fit of accessible overlap joint connecting piece and spacing subassembly during the construction of closing the mouth for the chord member that corresponds of both sides steel pipe arch rib can obtain aligning fast, and then makes the mouth that closes that forms between the two obtain quick adjustment to suitable position, and realizes closing the locking of mouth promptly after connecting the chord member of overlap joint connecting piece and both sides steel pipe arch rib, and follow-up installation that can close the section fast.)

1. The utility model provides a steel pipe arched bridge arch rib closure structure which characterized in that, it includes:

the steel tube arch rib comprises two groups of steel tube arch ribs (1), wherein each group of steel tube arch ribs (1) comprises two groups of chords (101) which are arranged in the vertical direction, a connecting rod piece (102) is arranged between the two groups of chords (101), and the ends of the two groups of steel tube arch ribs (1) are spaced and form closure openings (103);

at least one lap joint connecting piece (2), wherein two ends of the lap joint connecting piece are respectively connected with the corresponding chords (101) of the steel pipe arch ribs (1) at two sides;

at least one limiting component (3) which is arranged on the chord member (101) and used for limiting the end part of the lap joint connecting piece (2);

and two ends of the closure section arch rib arranged in the closure opening (103) are respectively connected with the end parts of the two groups of steel pipe arch ribs (1).

2. The steel tube arch bridge arch rib closure structure of claim 1, wherein three sets of said lap joint connectors (2) are provided between two corresponding chords (101) of two sets of said steel tube arch ribs (1), wherein one set of said lap joint connectors (2) is located at the top of said chords (101), and the remaining two sets of said lap joint connectors (2) are provided at two sides of the bottom of said chords (101);

the two limiting assemblies (3) are respectively positioned on two groups of chords (101) in one of the steel pipe arch ribs (1) and comprise two limiting stop blocks (30) used for positioning the lap joint connecting piece (2) above the chords (101) from two sides.

3. The steel tube arch bridge arch rib closure structure as recited in claim 2, wherein two sets of limit stops (30) are symmetrically distributed on two sides of the axis of the chord member (101) and form a limit opening (31) for placing the lap joint connector (2), and one side of the limit stop (30) close to the lap joint connector (2) is arranged in an inclined manner that the bottom gradually approaches the lap joint connector (2).

4. A steel tube arch bridge arch rib closure structure according to claim 1, further comprising:

and the reinforcing members (20) are arranged at two ends of the lap joint connecting piece (2) and are fixedly connected with the chord members (101).

5. A steel tube arch bridge arch rib closure structure according to claim 4, wherein the reinforcing members (20) are reinforcing ribs connected to both sides of the lap joint connector (2) and are provided in plurality at intervals on both sides of the end of the lap joint connector.

6. The steel tube arch bridge arch rib closure structure of claim 1, wherein the chord member (101) is formed by connecting a plurality of steel tube segments in sequence, and both ends of the connecting member (102) are respectively connected with two corresponding sets of steel tube segments on two sets of chord members (101) to form the arch rib segment (10).

7. A method for closing arch ribs of a steel tube arch bridge is characterized by comprising the following steps:

two groups of steel pipe arch ribs (1) are erected to a designated position;

lifting the steel pipe arch rib (1), and lifting the end arch rib segment (10) of the second group of steel pipe arch rib (1) close to the first group of steel pipe arch rib at the end point to enable the end part of the second group of steel pipe arch rib to be higher than the end part of the first group of steel pipe arch rib (1);

the top edges of two groups of chords (101) in the second group of steel pipe arch ribs (1) are connected with one lap joint connecting piece (2), two sides of the bottoms of the two groups of chords (101) in the first group of steel pipe arch ribs (1) are connected with one lap joint connecting piece (2), and the limiting component (3) is connected to the tops of the two groups of chords (101) of the first group of steel pipe arch ribs (1);

lowering arch rib segments (10) at the ends of a second group of steel pipe arch ribs (1), enabling the ends of the lap joint connectors (2) at the tops of two chords (101) of the second group of steel pipe arch ribs (1) to be lapped in the limiting assemblies (3) of the first group of steel pipe arch ribs (1), and enabling the second group of steel pipe arch ribs (1) to be lapped on the two lap joint connectors (2) at the bottoms of the chords (101) of the first group of steel pipe arch ribs (1);

connecting and fixing the end parts of the lap joint connecting pieces (2) on the inner chords (101) of the first group of steel pipe arch ribs (1) and the second group of steel pipe arch ribs (1) with the chords (101) in the other group of steel pipe arch ribs (1);

and moving the closure segment arch rib (4) to the closure opening (103), and respectively connecting the two ends of the closure segment arch rib (4) with the two groups of steel pipe arch ribs (1).

8. The method for closing the steel tube arch bridge arch rib according to claim 7, wherein the step of erecting two sets of steel tube arch ribs (1) to the specified positions comprises the following steps:

completely erecting a first group of steel pipe arch ribs (1);

erecting a second group of steel pipe arch ribs (1) except the last arch rib segment (10);

hoisting the last arch rib segment (10) of the second group of steel pipe arch ribs (1) to the end position of the erected second group of steel pipe arch ribs (1), and keeping the hoisting state for connection and fixation;

the hoisting connection on the last arch rib section (10) of the second group of steel tube arch ribs (1) is released, and the section is freely cantilevered.

9. The method for closing the steel tube arch bridge arch rib according to the claim 7, wherein when the lowering of the arch rib sections (10) at the end of the second set of steel tube arch rib (1) is performed, the lowering process of the arch rib sections (10) at the end of the second set of steel tube arch rib (1) is a spaced multi-section lowering process.

10. The steel tube arch bridge arch rib closure method according to claim 7, wherein the moving of the closure segment arch rib (4) into the closure opening (103) and the connecting of the two ends of the closure segment arch rib (4) with the two sets of steel tube arch ribs (1) respectively comprises:

cutting and blocking the closure segment arch rib (4);

and sequentially passing the closure section steel pipe block arches obtained by cutting the blocks through two groups of the lap joint connecting pieces (2) at the bottoms of the chords (101) and connecting the closure section steel pipe block arches to two groups of steel pipe arch ribs (1).

Technical Field

The application relates to the field of steel pipe arch bridge arch rib construction, in particular to a closure structure and a closure method for steel pipe arch bridge arch ribs.

Background

The arch rib of the steel tube arch bridge is usually hoisted from two ends to the middle in sections, and finally the closure section is connected with the sections which are installed at the two ends, so that the closure of the arch rib is completed.

In the related technology, measurement is needed before closure of steel pipe arch bridge arch ribs, initial positioning is carried out by using a cable crane after position data is obtained, fine positioning is carried out on the end parts of the steel pipe arch ribs on two sides in the longitudinal bridge direction, the transverse bridge direction and the vertical direction by using an adjusting device arranged at a closure opening in advance and matching with a jack or a manual hoist, the line shape of the closure section is finely adjusted, and then closure opening locking is completed. After locking, a cable crane is adopted to hoist the closure section to the closure opening, and then welding of welding seams of the upper and lower chord closure sections is started.

However, the process of adjusting and locking the closure opening in the above-mentioned technology is too time-consuming, and has a high requirement for operation, and when moving and positioning each structure, it will occupy the cable crane and other equipment for a long time, increasing the operation risk, and there is a need for further improvement.

Disclosure of Invention

The embodiment of the application provides a closure structure and a closure method for an arch rib of a steel tube arch bridge, and aims to solve the problems that in the prior art, closure openings in the closure structure of the arch rib of the steel tube arch bridge are too time-consuming and labor-consuming in the adjustment and locking processes, various devices are occupied for a long time, and the like.

The first aspect provides a steel pipe arch bridge arch rib closure structure, adopts following technical scheme:

a steel pipe arched bridge arch rib closure structure, it includes:

the steel pipe arch rib comprises two groups of steel pipe arch ribs, wherein each group of steel pipe arch ribs comprises two groups of chords which are arranged in the vertical direction, a connecting rod piece is arranged between the two groups of chords, and the end parts of the two groups of steel pipe arch ribs are spaced to form closure openings;

at least one connecting piece, two ends of which are respectively connected with the corresponding chords of the steel tube arch ribs on two sides;

at least one limiting component which is arranged on the chord member and is used for limiting the end part of the lap joint connecting piece;

and two ends of the closure section arch rib arranged in the closure opening are respectively connected with the end parts of the two groups of steel pipe arch ribs.

In some embodiments, three sets of the lap joint connectors are arranged between two chords corresponding to two sets of the steel tube arch ribs, one set of the lap joint connectors is located at the tops of the chords, and the remaining two sets of the lap joint connectors are located on two sides of the bottoms of the chords;

the two limiting assemblies are respectively positioned on two groups of chords in one of the steel pipe arch ribs and comprise two limiting stop blocks for positioning the lap joint connecting piece above the chords from two sides.

In some embodiments, two sets of limit stops are symmetrically distributed on two sides of the chord axis and form a limit opening for the lap joint connecting piece to be placed between, and one side of the limit stop close to the lap joint connecting piece is an inclined arrangement with the bottom gradually close to the lap joint connecting piece.

In some embodiments, further comprising: and the reinforcing members are arranged at two ends of the lap joint connecting piece and are fixedly connected with the chord members.

In some embodiments, the reinforcing members are reinforcing ribs connected to both sides of the connecting steel beam, and a plurality of reinforcing ribs are arranged at intervals on both sides of the end portion of the connecting steel beam.

In some embodiments, the chord member is formed by sequentially connecting a plurality of steel pipe segments, and two ends of the connecting member are respectively connected with two corresponding sets of steel pipe segments on two sets of chord members to form the arch rib segment.

In a second aspect, a steel tube arch bridge arch rib closure method is provided, which adopts the following technical scheme:

a method for closing arch ribs of a steel tube arch bridge comprises the following steps:

setting up two groups of steel pipe arch ribs to a specified position;

hoisting the steel pipe arch ribs, namely hoisting the end arch rib sections of the second group of steel pipe arch ribs close to the first group of steel pipe arch ribs at the end points, so that the end parts of the second group of steel pipe arch ribs are higher than the end parts of the first group of steel pipe arch ribs;

connecting a lap joint connecting piece on the top edges of the two groups of chords in the second group of steel pipe arch ribs, connecting a lap joint connecting piece on both sides of the bottoms of the two groups of chords in the first group of steel pipe arch ribs, and connecting a limiting assembly to the tops of the two groups of chords of the first group of steel pipe arch ribs;

lowering the arch rib sections at the end parts of the second group of steel pipe arch ribs, enabling the end parts of the lap joint connecting pieces at the tops of the two chord members of the second group of steel pipe arch ribs to be lapped in the limiting assemblies of the first group of steel pipe arch ribs, and enabling the second group of steel pipe arch ribs to be lapped on the two lap joint connecting pieces at the bottoms of the chord members of the first group of steel pipe arch ribs;

connecting and fixing the end parts of the lap joint connecting pieces on the inner chords of the first group of steel pipe arch ribs and the second group of steel pipe arch ribs with the chords in the other group of steel pipe arch ribs;

and moving the closure segment arch rib into the closure opening, and respectively connecting the two ends of the closure segment arch rib with the two groups of steel pipe arch ribs.

In some embodiments, the setting up two sets of steel pipe ribs to specified positions includes:

completely erecting a first group of steel pipe arch ribs;

erecting a second group of steel pipe arch ribs except the last arch rib segment;

hoisting the last arch rib segment of the second group of steel pipe arch ribs to the end position of the erected second group of steel pipe arch ribs, and keeping the hoisting state for connection and fixation;

and (4) removing the hoisting connection on the last arch rib section of the second group of steel pipe arch rib steel pipes, and enabling the section to be freely cantilevered.

In some embodiments, the lowering of the rib sections at the ends of the second set of steel tube ribs is performed in a spaced multi-stage manner.

In some embodiments, the moving the closure segment arch rib into the closure opening and connecting both ends of the closure segment arch rib with two sets of steel pipe arch ribs, respectively, includes:

cutting and partitioning the closure segment arch rib;

and sequentially penetrating the closure section steel pipe block arches obtained by cutting the blocks between two groups of lap joint connecting pieces at the bottom of the chord member and connecting the closure section steel pipe block arches to two groups of steel pipe arch ribs.

The beneficial effect that technical scheme that this application provided brought includes:

the embodiment of the application provides a steel pipe arch bridge arch rib closure structure and closure method, because the quick location fit of accessible overlap joint connecting piece and spacing subassembly when carrying out the construction of steel pipe arch bridge closure mouth, make the corresponding chord member of both sides steel pipe arch rib can obtain quick alignment, and then make the closure mouth that forms between the two obtain quick adjustment to suitable position, and realize closing the locking of mouth promptly after connecting overlap joint connecting piece and the chord member of both sides steel pipe arch rib, follow-up installation that can close the dragon section fast, therefore, effectively reduce the time of closing the regulation of mouth and locking, and avoid occupying too much equipment, whole efficiency of construction is showing and is promoting.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural view of a steel pipe rib supply closure provided in an embodiment of the present application;

FIG. 2 is a schematic cross-sectional structural view of a chord provided in an embodiment of the present application;

FIG. 3 is a schematic diagram of step S1-1 according to the embodiment of the present application;

FIG. 4 is a diagram illustrating step S1-2 according to an embodiment of the present application

FIG. 5 is a diagram illustrating step S1-3 according to an embodiment of the present application

FIG. 6 is a diagram illustrating step S3 according to an embodiment of the present invention;

fig. 7 is a schematic diagram of step S4 according to the embodiment of the present application.

In the figure:

1. steel pipe arch ribs; 10. a rib segment; 101. a chord member; 102. connecting rod pieces; 103. closing the opening;

2. a lap joint connector; 20. a reinforcement;

3. a limiting component; 30. a limit stop block; 31. a limiting port;

4. closure segment arch rib.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The embodiment of the application provides a closure structure of an arch rib of a steel tube arch bridge and a closure method thereof, which can solve the problems that in the closure structure of the arch rib of the steel tube arch bridge in the related art, the closure opening is too time-consuming and labor-consuming in the adjustment and locking processes, various devices are occupied for a long time, and the like.

Fig. 1 is a steel pipe arch bridge arch rib closure structure provided by the embodiment of the present application, which includes two sets of steel pipe arch ribs 1, at least one lap joint connector 2, at least one limiting component 3, and closure segment arch ribs. Each group of steel tube arch ribs 1 comprises two groups of chords 101 which are arranged in the vertical direction, a connecting rod member 102 is arranged between the two groups of chords 101, and the end parts of the two groups of steel tube arch ribs 1 are spaced to form closure openings 103; two ends of the lap joint connecting piece 2 are respectively connected with corresponding chords 101 of the steel pipe arch ribs 1 at two sides; the limiting component 3 is arranged on the chord member 101 and is used for limiting the end part of the lap joint connecting piece 2; two ends of the closure segment arch rib are respectively connected with the end parts of the two groups of steel pipe arch ribs 1.

Specifically, the application provides a steel pipe arched bridge arch rib closure structure, realize two sets of steel pipe arch rib 1's connection through overlap joint connecting piece 2 in it, realize closing the locking of a mouthful 103, spacing subassembly 3 in it makes overlap joint connecting piece 2 when carrying out two sets of steel pipe arch rib 1's connection simultaneously, two sets of steel pipe arch rib 1's position accessible overlap joint connecting piece 2 location is placed and is realized direct positioning in spacing subassembly 3, close the quick alignment of a mouthful 103 of closing before a mouthful 103 locking promptly, avoided utilizing too much equipment to continuously remove and adjust, the efficiency of construction is greatly improved.

Further, referring to fig. 1 and 2, three groups of lap joint connectors 2 are respectively arranged between two chords 101 corresponding to two groups of steel pipe arch ribs 1, wherein one lap joint connector 2 is positioned at the top of the chord 101, and the remaining two groups of lap joint connectors 2 are arranged at two sides of the bottom of the chord 101; the two limiting assemblies 3 are respectively positioned on two groups of chords 101 in the same steel pipe arch rib 1 and comprise two limiting stop blocks 30 for positioning the lap joint connecting piece 2 above the chords 101 from two sides.

In this embodiment, the lap joint connector 2 is specifically a connecting steel beam, and both ends of the lap joint connector are welded and fixed with the chords 101 in the two sets of steel tube arch ribs 1; two groups of connecting steel beams positioned at two sides of the bottom of the chord member 101 are symmetrically arranged and are provided with intervals between the connecting steel beams for use when arch ribs of a subsequent closure section are reserved. The limiting component 3 is positioned at the top edge of the two groups of chords 101 of one group of steel pipe arch ribs 1, so that the lapping connecting piece 2 at the top of the chords 101 can be positioned when being aligned and fixed, and the position positioning and connection of the two groups of steel pipe arch ribs 1 can be quickly and conveniently completed.

Further, referring to fig. 2, two sets of limit stop 30 symmetric distribution form the spacing mouth 31 that supplies lap joint connecting piece 2 to place between chord 101 axis both sides and, and one side that limit stop 30 is close to lap joint connecting piece 2 is the slope setting that the bottom is close to lap joint connecting piece 2 gradually.

In this embodiment, limit stop 30 is the T font dog that two steel sheet welding formed, and two sets of limit stop 30 are close to the terminal surface of overlap joint spare 2 between the two and are the inclined plane and lay, and this inclined plane sets up and specifically its from its top to bottom is close to overlap joint spare 2 gradually for spacing mouth 31 between two sets of limit stop 30 is the open arc form that is the trend of opening in top, and worth explaining is that the minimum interval between two sets of limit stop 30 bottoms is not more than overlap joint spare 2 width distance between the two. Furthermore, because spacing mouth 31 open the formula arc structure and will make lap joint spare 2's tip place wherein fast to it is spacing finally to obtain the butt of both sides limit stop 30 in the bottom, realizes lap joint spare 2's quick butt joint location, the convenient degree when further improving the construction operation.

Further, referring to fig. 1, the arch rib closure structure of the steel tube arch bridge provided by the embodiment of the present application further includes reinforcing members 20 disposed at two ends of the lap joint connector 2, and the reinforcing members are fixedly connected to the chord members 101.

Further, reinforcement 20 is for connecting in the reinforcement floor of connecting the girder steel both sides and being equipped with a plurality ofly at the interval of connecting girder steel tip both sides.

In this embodiment, the reinforcing rib plate is welded on the two sides of the lap joint connector 2 and the plate surface is perpendicular to the lap joint connector 2, and the bottom edge of the reinforcing rib plate is welded and fixed with the chord members 101, so that the chord members 101 and the lap joint connector 2 are connected, and the stability of the lap joint connector 2 between the two groups of chord members 101 is further ensured.

Further, referring to fig. 3, the chord member 101 is formed by sequentially connecting a plurality of steel pipe segments, and both ends of the connecting member 102 are respectively connected to two corresponding steel pipe segments of the two chord members 101 to form the rib segment 10.

The embodiment of the application also provides a steel pipe arch bridge arch rib closure method, which comprises the following steps:

s1, setting up two groups of steel tube arch ribs 1 to a specified position, as shown in the figure 3-figure-5;

s2, adjusting the hook and cable of the cable crane, and lifting the second set of steel tube arch rib 1 close to the end arch rib segment 10 of the first set of steel tube arch rib at a single point at the end point, so that the end of the second set of steel tube arch rib is higher than the end of the first set of steel tube arch rib 1, as shown in fig. 6;

s3, connecting a lap joint connector 2 to the top edges of two sets of chords 101 in the second set of steel tube arch rib 1, connecting a lap joint connector 2 to both sides of the bottoms of two sets of chords 101 in the first set of steel tube arch rib 1, and connecting a limiting component 3 to the tops of two sets of chords 101 in the first set of steel tube arch rib 1, as shown in fig. 6;

s4, lowering the arch rib segments 10 at the end parts of the second group of steel tube arch ribs 1, enabling the end parts of the lap joint connectors 2 at the tops of the two chords 101 of the second group of steel tube arch ribs 1 to be lapped in the limiting assemblies 3 of the first group of steel tube arch ribs 1, enabling the second group of steel tube arch ribs 1 to be lapped on the two lap joint connectors 2 at the bottoms of the chords 101 of the first group of steel tube arch ribs 1, and removing the hanging connection of the arch rib segments 10 at the end parts of the second group of steel tube arch ribs 1 after the lapping is completed, as shown in figure 7;

s5, connecting and fixing the ends of the lap joint 2 on the inner chords 101 of the first and second sets of steel tube arch ribs 1 and 1 with the chords 101 of the other set of steel tube arch ribs 1, and connecting the reinforcing members 20 at the two ends of the lap joint 2, as shown in fig. 7;

s6, moving the closure segment arch rib 4 into the closure opening 103, and respectively connecting the two ends of the closure segment arch rib 4 with the two groups of steel pipe arch ribs 1.

Specifically, when closing a mouthful 103 structure construction, but utilize overlap joint connecting piece 2 and locating part to make the second group steel pipe arch rib 1 that the single-point lifted by crane the tip of first group steel pipe arch rib 1 of quick overlap joint location at the in-process of transferring to overlap joint connecting piece 2 between the two carries out welded fastening after the overlap joint, can realize closing the locking of mouthful 103, the final setting of closing a mouthful 103 of accomplishing fast, and make final closing a section arch rib 4 and connect, whole construction operation is high-efficient swift.

In this example, the lap joint connector 2, the limiting component 3, the reinforcing member 20 and the chords 101 are all fixed by welding, and the steel pipes in the closure segment arch rib 4 and the chords 101 on the two sides are fixed by welding. Meanwhile, the welding and fixing of the mechanisms are performed at night or in the early morning when the temperature difference between the environment and the steel structure is small, and therefore the hidden danger of connection follow-up stability caused by large deformation of the steel structure due to the influence of external temperature is avoided.

Further, step S1 includes the following steps:

s1-1, completely erecting a first group of steel tube arch ribs 1;

s1-2, erecting a second set of steel tube ribs 1 except for the last rib segment 10, see fig. 3;

s1-2, hoisting the last arch rib segment 10 of the second group of steel tube arch ribs 1 to the end position of the erected second group of steel tube arch ribs 1, and keeping the hoisting state for connection and fixation, as shown in FIGS. 3 and 4;

and S1-3, releasing the hoisting connection on the last arch rib segment 10 of the second group of steel tube arch ribs 1 and enabling the segment to be freely cantilevered, as shown in figure 5.

Because the last arch rib segment 10 is lifted by two ends when lifted to the end part of the second group of steel pipe arch ribs 1, the difference between the load borne by the cables and the lifting hooks at the two ends and the subsequent single-point lifting of the segment of arch rib segment 10 is larger, the lifting connection of the two ends of the segment of arch rib segment 10 is released after the segment of arch rib segment 10 is connected to the second group of steel pipe arch ribs 1, the single-point lifting of the end part of the segment of arch rib segment 10 can be stably carried out after the cables and the lifting hooks of the cable crane are adjusted, and the construction safety and stability are guaranteed.

In the embodiment, the lap joint connecting piece 2 and the two groups of steel pipe arch ribs 1 are welded and fixed,

further, the lowering process of the end rib segment 10 of the second set of steel tube ribs 1 in step S4 is a spaced multi-segment lowering.

Furthermore, the lap joint connecting piece 2 on the second group of steel tube arch ribs 1 can be stably and accurately lapped in the upper limit position assembly 3 of the first group of steel tube arch ribs 1, and the stability and the safety of construction operation are improved.

Further, step S6 includes the following steps:

s6-1, cutting and blocking the closure segment arch rib 4;

s6-2, sequentially penetrating each closure section steel pipe arch between two groups of lap joint connectors 2 at the bottom of the chord member 101 and connecting the closure section steel pipe arches to the steel pipe arch ribs 1 at two sides.

Specifically, the cutting line of the closure segmental arch rib 4 is parallel to the extending direction of the closure segmental arch rib when the closure segmental arch rib is cut, so that the closure segmental arch rib 4 is divided into a plurality of blocks in the circumferential direction, namely the blocks can penetrate into the closure opening 103 from the interval between the two groups of lap joint connectors 2 at the bottom of the chord 101, and finally the steel pipe of the closure segmental arch rib 4 is connected with the two groups of steel pipe arch ribs 1, so that the construction of the closure structure of the steel pipe arch bridge arch ribs is completed.

In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.