Open-spandrel girder arch triangular area mounting device and construction method thereof

Abstract

The invention provides an open-spandrel girder arch triangular area installation device and a construction method thereof.The open-spandrel girder arch triangular area installation device comprises a girder arch, a main pier and two inclined supporting beams, transverse moving devices are arranged on the two sides of the girder arch, each transverse moving device comprises a hanging basket and a crown block system, each crown block system is installed on the top of the corresponding hanging basket and comprises a steel girder lifting appliance, and a cable bent tower is arranged on the top of the girder arch; a plurality of upper chord inhaul cables are arranged between the beam arch and the cable bent tower, and a plurality of lower chord inhaul cables are arranged between the main pier and the inclined supporting beam. The whole device can avoid the use of large hoisting equipment, greatly reduces the construction cost, solves the problem of lower chord diagonal bracing beam installation under the construction condition, and utilizes a hanging basket with an installed upper chord as a foundation to build a crown block system of the hanging basket for hoisting, so that the upper chord and the lower chord are synchronously constructed, and the construction efficiency is improved. The construction is convenient, the safety risk is low, and the construction period is shortened.

Description

Technical Field

[0001] The invention relates to the field of bridge construction, and in particular to a hollow-type beam-arch triangle area installation device and a construction method thereof. Background Art

[0002] The upper and lower chords of a hollow continuous rigid frame bridge cannot withstand the construction load of a hanging basket under a long cantilever state, and require the use of auxiliary means such as temporary support or cables. Generally, there are four methods: double-layer cable hanging basket construction method, hanging and bracket combined segment cast-in-place method, upper chord hanging basket suspended casting method supported by lower chord hanging and bracket, and lower chord hanging and upper chord bracket overall cast-in-place method.

[0003] In conventional construction methods, ordinary hanging baskets combined with automobile cranes are subject to construction space limitations and poor economy of large lifting equipment, which increases construction costs. Under construction conditions where large lifting equipment cannot be used, the lower chord steel diagonal brace segmental beam is difficult to install. If the upper chord concrete beam transmits force to the lower chord through the bracket, the lower chord steel diagonal brace is prone to large deformation and poor stress in the completed bridge. The lower chord steel diagonal brace segmental beam is heavy, and when a hanging basket crane is used, the upper chord concrete beam is prone to cracking, making it difficult to ensure the stability of the hanging basket. At the same time, the existing construction methods cannot ensure the synchronous construction of the upper and lower chords, which increases the construction period, further increases the construction cost, and increases the amount of brackets used. For this reason, we propose a hollow beam arch triangle area installation device and its construction method to solve the above problems. Summary of the invention

[0004] The present invention provides a hollow-type beam-arch triangle area installation device and a construction method thereof, which solve the problems that the lifting of a through-hanging basket combined with a car crane is limited by the construction space, the economy of large lifting equipment is poor, and the construction cost is increased; at the same time, the lower chord steel diagonal brace segmental beam is difficult to install, and the lower chord steel diagonal brace is prone to cause large deformation and poor stress of the completed bridge.

[0005] Another problem solved by the present invention is that when a hanging basket crane is used, the upper chord concrete beam is prone to cracking, making it difficult to ensure the stability of the hanging basket; the upper and lower chords cannot be constructed synchronously, which increases the construction period and the amount of brackets used.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a hollow-type beam-arch triangular area installation device and a construction method thereof, comprising a beam-arch, a main pier and two diagonal bracing beams, a transverse movement device is provided on both sides of the beam-arch, the transverse movement device comprises a hanging basket and a crane system, the crane system is installed on the top of the hanging basket, the crane system comprises a steel beam hanger, a cable tower is provided on the top of the beam-arch, a plurality of upper chord cables are provided between the beam-arch and the cable tower, and a plurality of lower chord cables are provided between the main pier and the diagonal bracing beam.

[0007] In a preferred embodiment, the hanging basket includes a diamond truss and a plurality of slide rails. A plurality of first slide shoes are provided at the bottom of the diamond truss. The first slide shoes slide against the slide rails. The slide rails are installed at the top of the beam arch.

[0008] In the preferred embodiment, a first hydraulic cylinder is provided on the slide rail, one end of the first hydraulic cylinder is connected to the first slide shoe, a second hydraulic cylinder is provided on the top of the diamond truss, one end of the second hydraulic cylinder is connected to the overhead traveling system, and two third winches are provided on the top of the hanging basket.

[0009] In the preferred embodiment, a first winch and a second winch are provided on the top of the overhead crane system, hooks are provided on both sides of the overhead crane system, steel beam hangers are provided at the bottom of the two hooks, a plurality of second hangers are provided on the steel beam hangers, and the first winch and the second winch are connected to the hooks via steel cables.

[0010] In the preferred embodiment, a casting bottom plate is provided at the bottom of both sides of the beam arch, a plurality of anchor rods are provided at the top of one end of the casting bottom plate, the anchor rods are connected to the beam arch, one end of the casting bottom plate is connected to the hanging basket, and the other end of the casting bottom plate is connected to the steel beam hanger.

[0011] In the preferred embodiment, locking devices are provided at both ends of the lower chord cable and the upper chord cable. The locking devices include an anchor plate and a plurality of clips. An anchor ring is provided on the anchor plate. The clips are installed on the cables and an anti-loosening device is provided on the clips.

[0012] In the preferred solution, the main pier and the diagonal bracing beam are connected by the lower chord cable and the locking devices at both ends of the lower chord cable, and the cable tower and the beam arch are connected by the upper chord cable and the locking devices at both ends of the upper chord cable.

[0013] In the preferred solution, a plurality of embedded holes are provided on the main pier, the beam arch includes a plurality of beam sections, and the diagonal bracing beam includes a plurality of box beams.

[0014] A hollow-type beam-arch triangular area installation device and a construction method thereof, characterized in that: S1, the first beam section of the beam-arch is constructed by using a pre-buried bracket, and after the construction is completed, a hanging basket and a crane system are installed; S2, the steel beam hanger of the overhead crane system is connected to one end of the casting bottom plate, driving the third winch of the hanging basket and the overhead crane system to connect the anchor rod of the casting bottom plate with the front beam section, and the casting bottom plate is located at the bottom of the beam arch. After the casting bottom plate is positioned, the connection between the casting bottom plate and the overhead crane system is disconnected; S3, the next beam segment is cast on the casting bottom plate, and after the construction is completed, the construction moves to the next segment position; S4. While the beam segment is being cast in suspension, the overhead crane system is driven to adjust the installation angle of the box beam segment beam so that the overhead crane system can lift the box beam of the diagonal bracing beam. After the box beam is lifted to the installation elevation, the overhead crane system is driven to align the matching parts of the box beam. After the construction is completed, the overhead crane system moves to the next segment position; S5. Repeat S2 to S4 to construct the 2-3# beam section of the beam arch and the diagonal bracing beam, and install the lower chord cable and locking device on the 3# box beam of the diagonal bracing beam; S6, repeat S2~S4, construct the beam arch and the 4# beam section of the diagonal bracing beam, and after the 4# beam of the beam arch is constructed, install the cable tower; S7, cable system installation: repeat S2~S4, the lower chord cables are respectively installed on the C3, C5, C7, C9, C11 block diagonal bracing beams, and the upper chord cables are respectively installed on the 7#~10# segments until they are installed to the segment before the joint segment; S8. Removal of the cable system: After the construction of the joint section is completed and the upper and lower chords form a stable triangular structure, the cable system of the lower and upper chord cables can be removed.

[0015] The beneficial effects of the present invention are as follows: the overall device can avoid the use of large lifting equipment, greatly reducing construction costs. Under construction conditions, the overall device solves the problem of installing the diagonal bracing beam of the lower chord, and uses the hanging basket installed on the upper chord as the basis for setting up the overhead crane system of the hanging basket for hoisting, thereby allowing the upper and lower chords to be constructed synchronously, which has the advantages of convenient construction, low safety risks, and shortened construction period.

[0016] The overall device uses temporary cables and temporary locking devices for the lower and upper chord cables to reduce the bending moment tensile stress caused by the excessive length of the cantilever ends of the beam arch and the diagonal bracing beam. The coordinates of the anchor points of the temporary diagonal cables of the upper and lower chord beams of the main bridge and the cable force control construction require high accuracy. The overall device can significantly reduce the construction difficulty while meeting the accuracy requirements.

[0017] The overall device adopts a crane system plus an integrated basket device, which greatly reduces the frequency of use of large lifting equipment. It has high installation efficiency, simple operation, and saves construction time.

[0018] The hanging basket can move horizontally relative to the beam arch, and the overhead crane system can move horizontally on the hanging basket. The hanging basket combined with the overhead crane system can install the casting base plate with high precision. After the installation of the casting base plate is completed and the connection between the overhead crane system and the casting base plate is dismantled, the overhead crane system performs suspended casting construction, and the overhead crane system performs box girder construction of the diagonal bracing beam, so that the beam section of the beam arch and the box girder section of the diagonal bracing beam are constructed synchronously, which greatly reduces the construction period and has great promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments; Figure 1 It is a front view of the overall structure of the present invention; Figure 2 is a front view of the traverse device of the present invention; Figure 3 is a side view of the traverse device of the present invention; Figure 4 is a side view of the overhead travelling vehicle system of the present invention; Figure 5 It is a schematic diagram of the structure of the locking device of the present invention; Figure 6 It is a structural schematic diagram of the main pier of the present invention; Figure 7 is a side view of the traverse device of the present invention; Figure 8 It is a structural schematic diagram of beam section No. 1 of the overall structure of the present invention; Fig. 9 It is a structural schematic diagram of beam section No. 3 of the overall structure of the present invention; Fig.10 It is a structural schematic diagram of installing a cable tower on a beam arch of the present invention; Fig.11 It is a structural schematic diagram of beam section No. 7 of the overall structure of the present invention; Fig.12 It is a schematic diagram of the overall structure of the present invention after construction is completed; In the figure: transverse movement device 1; hanging basket 2; diamond truss 201; first slide shoe 202; slide rail 203; first hydraulic cylinder 204; second hydraulic cylinder 205; third winch 206; locking device 3; anchor plate 301; anchor ring 302; clip 303; anti-loosening device 304; overhead crane system 4; first winch 401; second winch 402; second slide shoe 403; hook 404; steel beam hanger 405; second hanger 406; casting bottom plate 5; anchor rod 501; lower chord cable 6; cable tower 7; main pier 8; embedded hole 801; beam arch 9; beam section 901; diagonal bracing beam 10; box beam 1001; upper chord cable 11. DETAILED DESCRIPTION

[0020] Embodiment 1: like Figure 1-12 In the invention, a hollow-type beam-arch triangular area installation device and a construction method thereof are provided, comprising a beam-arch 9, a main pier 8 and two diagonal bracing beams 10, a transverse movement device 1 is provided on both sides of the beam-arch 9, the transverse movement device 1 comprises a hanging basket 2 and a crane system 4, the crane system 4 is installed on the top of the hanging basket 2, the crane system 4 comprises a steel beam hanger 405, a cable tower 7 is provided on the top of the beam-arch 9, a plurality of upper chord cables 11 are provided between the beam-arch 9 and the cable tower 7, and a plurality of lower chord cables 6 are provided between the main pier 8 and the diagonal bracing beam 10. With this structure, The overall device can avoid the use of large lifting equipment and greatly reduce construction costs. Under construction conditions, the overall device solves the problem of installing the lower chord diagonal bracing beam 10. The upper chord installed hanging basket 2 is used as the basis for setting up the overhead crane system 4 of the hanging basket 2 for hoisting, thereby allowing the upper and lower chords to be constructed synchronously, which has the advantages of convenient construction, low safety risks, and shortened construction period.

[0021] The overall device adopts temporary cables and temporary locking devices 3 for the lower chord cables 6 and the upper chord cables 11 to reduce the bending moment tensile stress caused by the excessively long cantilever ends of the beam arch 9 and the diagonal bracing beam 10. The coordinates of the anchor points of the temporary diagonal cables of the upper and lower chord beams of the main bridge and the cable force control construction require high accuracy. The overall device can significantly reduce the construction difficulty while meeting the accuracy requirements.

[0022] The overall device adopts an integrated device of a crane system 4 and a hanging basket 2, which greatly reduces the use frequency of large lifting equipment, has high installation efficiency, simple operation, and saves construction time.

[0023] The hanging basket 2 can move horizontally relative to the beam arch 9, and the overhead crane system 4 can move horizontally on the hanging basket 2. The hanging basket 2 combined with the lifting of the overhead crane system 4 can install the casting base plate 5 with high precision. After the casting base plate 5 is installed, the connection between the overhead crane system 4 and the casting base plate 5 is disassembled, and the overhead crane system performs suspended casting construction 4. The overhead crane system 4 performs box beam 1001 construction of the diagonal bracing beam 10, so that the beam section 901 of the beam arch 9 and the box beam 1001 section of the diagonal bracing beam 10 are constructed synchronously, which greatly reduces the construction period.

[0024] By using the temporary cables of the lower chord cable 6 and the upper chord cable 11 and the temporary locking device 3 structure, the difficulty of erecting the lower chord diagonal bracing beam 10 is reduced; the phenomenon of large deformation of the diagonal bracing beam 10 and poor stress of the bridge is avoided. The combination of the hanging basket 2 and the overhead crane system 4 ensures that the concrete beam of the upper chord concrete beam arch 9 does not crack and ensures the stability of the hanging basket 2.

[0025] In the preferred solution, the hanging basket 2 includes a diamond truss 201 and a plurality of slide rails 203. A plurality of first slide shoes 202 are provided at the bottom of the diamond truss 201. The first slide shoes 202 slide against the slide rails 203. The slide rails 203 are installed on the top of the beam arch 9. With this structure, the first hoist 401 and the second hoist 402 are used for lifting, and the dedicated steel beam hanger 405 is lowered and connected. The angle is set before lifting. After the box beam 1001 is lifted to the installation elevation, the overhead crane system 4 moves, and the steel beam hanger 405 fine-adjusts the angle to align the diagonal bracing beam 10. During the lifting condition, the hanging basket 2 system is in an anchored state.

[0026] In the preferred solution, a first hydraulic cylinder 204 is provided on the slide rail 203, one end of the first hydraulic cylinder 204 is connected to the first sliding shoe 202, a second hydraulic cylinder 205 is provided on the top of the diamond truss 201, one end of the second hydraulic cylinder 205 is connected to the overhead crane system 4, and two third winches 206 are provided on the top of the hanging basket 2. With this structure, the overhead crane system 4 is arranged on the upper longitudinal beam of the main truss of the hanging basket 2, and a second sliding shoe 403 is arranged under the overhead crane system 4, and the second sliding shoe 403 falls on the hanging basket 2, and the overhead crane system 4 moves forward and backward with load by pulling the second hydraulic cylinder 205 to push.

[0027] In the preferred solution, a first hoist 401 and a second hoist 402 are provided on the top of the overhead crane system 4, hooks 404 are provided on both sides of the overhead crane system 4, steel beam hangers 405 are provided at the bottom of the two hooks 404, a plurality of second hangers 406 are provided on the steel beam hangers 405, and the first hoist 401 and the second hoist 402 are connected to the hooks 404 via steel cables. According to this structure, the first hoist 401 and the second hoist 402 are driven to raise and lower the steel beam hangers 405, and the second hangers 406 are driven to raise and lower the box beam 1001 at the bottom of the steel beam hangers 405.

[0028] In the preferred solution, a casting bottom plate 5 is provided at the bottom of both sides of the beam arch 9, and a plurality of anchor rods 501 are provided at the top of one end of the casting bottom plate 5, and the anchor rods 501 are connected to the beam arch 9, and one end of the casting bottom plate 5 is connected to the hanging basket 2, and the other end of the casting bottom plate 5 is connected to the steel beam hanger 405. With this structure, the hanging basket 2 can be combined with the hoisting of the overhead crane system 4 to install the casting bottom plate 5 with high precision, and after the casting bottom plate 5 is installed, the connection between the overhead crane system 4 and the casting bottom plate 5 is disassembled, and the overhead crane system performs the suspended pouring construction 4.

[0029] The hanging basket 2 can move horizontally relative to the beam arch 9 , and the overhead crane system 4 can move horizontally on the hanging basket 2 , so that the hanging basket 2 combined with the overhead crane system 4 can adjust the position of the casting bottom plate 5 .

[0030] In the preferred embodiment, both ends of the lower chord cable 6 and the upper chord cable 11 are provided with a locking device 3, the locking device 3 includes an anchor plate 301 and a plurality of clips 303, the anchor plate 301 is provided with an anchor ring 302, the clips 303 are installed on the cable, and the clips 303 are provided with an anti-loosening device 304. With this structure, the difficulty of erecting the lower chord diagonal bracing beam 10 is reduced by using the temporary cables of the lower chord cable 6 and the upper chord cable 11 and the temporary locking device 3 structure; the phenomenon of large deformation of the diagonal bracing beam 10 and the stress difference of the bridge is avoided. The combination of the hanging basket 2 and the overhead crane system 4 is adopted to ensure that the concrete beam of the upper chord concrete beam arch 9 does not crack, and the stability of the hanging basket 2 is ensured.

[0031] The locking devices 3 at both ends of the temporary buckle cable are anchors and matching clamps, and are equipped with anti-loosening devices 304 for the clips 303. The anti-loosening devices 304 are threaded plates of the clips 303, and the threaded plates are connected to the anchor rings 302. After the entire bundle of lower chord cables 6 or upper chord cables 11 is installed and tensioned, the clips 303 are pressed, and the tensioning end anchors press the clips 303 during the final cable body protection. The specific operation of pressing the clips 303 is as follows: install a hydraulic press, start the oil pump, and press the clips 303 one by one to the specified pressure. In order to ensure the reliability of anchoring, after the cable force is adjusted, the clips 303 need to be pressed, the press is removed, and the anti-loosening device 304 is installed.

[0032] In the preferred embodiment, the main pier 8 and the diagonal bracing beam 10 are connected by the lower chord cable 6 and the locking devices 3 at both ends of the lower chord cable 6, and the cable tower 7 and the beam arch 9 are connected by the upper chord cable 11 and the locking devices 3 at both ends of the upper chord cable 11.

[0033] In the preferred embodiment, the main pier 8 is provided with a plurality of pre-buried holes 801 , the beam arch 9 includes a plurality of beam sections 901 , and the diagonal bracing beam 10 includes a plurality of box beams 1001 . With this structure, the lower chord cable 6 is installed on the pre-buried hole 801 .

[0034] Embodiment 2: Further described in combination with Embodiment 1: A hollow-type beam arch triangular area installation device and a construction method thereof, characterized in that: S1, the first beam section 901 of the beam arch 9 is constructed by using a pre-buried bracket, and after the construction is completed, the hanging basket 2 and the overhead traveling system 4 are installed; S2, the steel beam hanger 405 of the overhead crane system 4 is connected to one end of the casting bottom plate 5, and the third hoist 206 of the hanging basket 2 and the overhead crane system 4 are driven to connect the anchor rod 501 of the casting bottom plate 5 with the front beam section 901, and the casting bottom plate 5 is located at the bottom of the beam arch 9. After the casting bottom plate 5 is positioned, the connection between the casting bottom plate 5 and the overhead crane system 4 is disconnected; S3, the next beam section 901 is cast on the casting bottom plate 5, and after the construction is completed, the construction moves to the next section position; S4, while the beam segment 901 is being cast in suspension, the overhead crane system 4 is driven to adjust the installation angle of the segmental beam of the box beam 1001, so that the overhead crane system 4 can lift the box beam 1001 of the diagonal bracing beam 10. After the box beam 1001 is lifted to the installation elevation, the overhead crane system 4 is driven to align the matching parts of the box beam 1001. After the construction is completed, the overhead crane system 4 moves to the next segment position; S5, repeat S2 to S4, construct the 2-3# beam section of the beam arch 9 and the diagonal bracing beam 10, and install the lower chord cable 6 and the locking device 3 on the diagonal bracing beam 103# box beam 1001; S6, repeat S2 to S4, construct the beam arch 9 and the diagonal bracing beam 104# beam section, after the construction of the 4# beam of the beam arch 9 is completed, install the cable tower 7; S7, cable system installation: repeat S2~S4, lower chord cable 6 is installed on C3, C5, C7, C9, C11 block diagonal bracing beam 10 respectively, upper chord cable 11 is installed on 7#~10# segments respectively, until it is installed to the segment before the joint segment; S8. Removal of the cable system: After the construction of the joint section is completed and the upper and lower chords form a stable triangle structure, the cable system of the lower chord cable 6 and the upper chord cable 11 can be removed.

[0035] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A hollow beam arch triangular area installation device, characterized by: The invention comprises a beam arch (9), a main pier (8) and two diagonal bracing beams (10). Both sides of the beam arch (9) are provided with a transverse movement device (1). The transverse movement device (1) comprises a hanging basket (2) and a crane system (4). The crane system (4) is installed on the top of the hanging basket (2). The crane system (4) comprises a steel beam hanger (405). A cable tower (7) is provided on the top of the beam arch (9). A plurality of upper chord cables (11) are provided between the beam arch (9) and the cable tower (7). A plurality of lower chord cables (6) are provided between the main pier (8) and the diagonal bracing beam (10).

2. According to claim 1, a hollow beam arch triangular area installation device is characterized by: The hanging basket (2) comprises a diamond truss (201) and a plurality of slide rails (203); a plurality of first slide shoes (202) are provided at the bottom of the diamond truss (201); the first slide shoes (202) slide against the slide rails (203); and the slide rails (203) are installed on the top of the beam arch (9).

3. According to claim 2, a hollow beam arch triangular area installation device is characterized by: A first hydraulic cylinder (204) is provided on the slide rail (203), one end of the first hydraulic cylinder (204) is connected to the first slide shoe (202), a second hydraulic cylinder (205) is provided on the top of the diamond truss (201), one end of the second hydraulic cylinder (205) is connected to the overhead traveling crane system (4), and two third winches (206) are provided on the top of the hanging basket (2).

4. According to claim 1, a hollow arch triangular area installation device is characterized by: A first hoist (401) and a second hoist (402) are provided on the top of the overhead crane system (4), hooks (404) are provided on both sides of the overhead crane system (4), steel beam hangers (405) are provided at the bottom of the two hangers (404), a plurality of second hangers (406) are provided on the steel beam hangers (405), and the first hoist (401) and the second hoist (402) are connected to the hangers (404) via steel cables.

5. According to claim 1, a hollow beam arch triangular area installation device is characterized by: Casting bottom plates (5) are provided at the bottom of both sides of the beam arch (9), a plurality of anchor rods (501) are provided at the top of one end of the casting bottom plate (5), the anchor rods (501) are connected to the beam arch (9), one end of the casting bottom plate (5) is connected to the hanging basket (2), and the other end of one end of the casting bottom plate (5) is connected to the steel beam hanger (405).

6. According to claim 1, a hollow arch triangular area installation device is characterized by: Both ends of the lower chord cable (6) and the upper chord cable (11) are provided with locking devices (3), the locking devices (3) comprising an anchor plate (301) and a plurality of clips (303), the anchor plate (301) being provided with an anchor ring (302), the clips (303) being mounted on the cable, and the clips (303) being provided with an anti-loosening device (304).

7. According to claim 6, a hollow arch triangular area installation device is characterized by: The main pier (8) and the diagonal bracing beam (10) are connected by the lower chord cable (6) and the locking devices (3) at both ends of the lower chord cable (6), and the cable tower (7) and the beam arch (9) are connected by the upper chord cable (11) and the locking devices (3) at both ends of the upper chord cable (11).

8. According to claim 1, a hollow beam arch triangular area installation device is characterized by: A plurality of embedded holes (801) are provided on the main pier (8), the beam arch (9) includes a plurality of beam sections (901), and the diagonal bracing beam (10) includes a plurality of box beams (1001).

9. A hollow beam arch triangular area installation device and a construction method thereof according to any one of claims 1 to 8, characterized in that: S1, the first beam section (901) of the beam arch (9) is constructed using a pre-buried bracket, and after the construction is completed, the hanging basket (2) and the overhead crane system (4) are installed; S2, the steel beam hanger (405) of the overhead crane system (4) is connected to one end of the casting bottom plate (5), and the third hoist (206) of the hanging basket (2) and the overhead crane system (4) are driven to connect the anchor rod (501) of the casting bottom plate (5) to the front beam section (901), and the casting bottom plate (5) is located at the bottom of the beam arch (9). After the casting bottom plate (5) is positioned, the connection between the casting bottom plate (5) and the overhead crane system (4) is disconnected; S3, performing suspended pouring construction on the next beam segment (901) on the pouring bottom plate (5), and after the construction is completed, the construction moves to the next segment position; S4, while the beam segment (901) is being cast in suspension, the overhead crane system (4) is driven to adjust the installation angle of the segmental beam of the box beam (1001) so that the overhead crane system (4) can lift the box beam (1001) of the diagonal bracing beam (10). After the box beam (1001) is lifted to the installation elevation, the overhead crane system (4) is driven to align the matching parts of the box beam (1001). After the construction is completed, the overhead crane system (4) moves to the next segment position; S5, repeat S2 to S4, construct the 2-3# beam section of the beam arch (9) and the diagonal bracing beam (10), and install the lower chord cable (6) and the locking device (3) on the 3# box beam (1001) of the diagonal bracing beam (10); S6, repeat S2 to S4, construct the 4# beam section of the beam arch (9) and the diagonal bracing beam (10), and after the construction of the 4# beam of the beam arch (9) is completed, install the cable tower (7); S7, cable system installation: repeat S2 to S4, install the lower chord cable (6) on the C3, C5, C7, C9, C11 block diagonal bracing beams (10) respectively, and install the upper chord cable (11) on the 7# to 10# segments respectively until it is installed to the segment before the joint segment; S8. Removal of the cable system: After the joint section is completed and the upper and lower chords form a stable triangular structure, the cable system of the lower chord cable (6) and the upper chord cable (11) can be removed.

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