Construction method of main and secondary arches of double-wing arch bridge and the hoisting equipment used therein

Abstract

A sling includes a crossbeam, a first lifting lug, a second lifting lug, two hanging rods, two longitudinal beams, a first telescopic rod and two second telescopic rods. The crossbeam includes a first end and a second end; the first lifting lug is installed at the middle position of the crossbeam; the second lifting lug is hinged to the second end of the crossbeam, and the first lifting lug and the second lifting lug are both used to connect to a crane; the two hanging rods are respectively located at the first end and the second end, each hanging rod includes a connecting seat and a rod body, the connecting seat is hinged to the crossbeam, and one end of the rod body is hinged to the connecting seat; the two longitudinal beams are respectively hinged to the free ends of the two rod bodies, and the longitudinal beams are used to connect to a heavy object; the opposite ends of the first telescopic rod are respectively hinged to the second lifting lug and the crossbeam; the two second telescopic rods are respectively hinged to the two rod bodies and the longitudinal beams. The sling can facilitate the adjustment of the aerial posture of the heavy object. The present invention also provides a construction method for the main and secondary arches of a double-wing arch bridge using the sling.

Description

Technical Field

[0001] The invention relates to the technical field of construction engineering, and in particular to a construction method for a main and auxiliary arch of a double-wing arch bridge and a hoisting device used therein. Background Art

[0002] The arch ribs of conventional arch bridges are usually composed of a pair of vertical parallel arch ribs. The arch ribs are usually installed by cable hoisting construction, bracket construction and rotation construction. With the development of bridge construction technology and the improvement of the ornamental value of urban arch bridges, double-wing arch bridges have begun to attract attention and promotion. Figure 1 The double-wing arch bridge 300 generally includes a main beam 310 formed by a steel box and two arch ribs arranged on opposite sides of the main beam 310. Both arch ribs include an outward-inclined main arch 321 and an inward-inclined auxiliary arch 323. The main arch 321 and the auxiliary arch 323 are both formed by splicing a plurality of arch rib segments 320, and the main arch 321 and the auxiliary arch 323 intersect within a certain range. The traditional arch rib installation process can well meet the installation of vertical parallel arch ribs or only one-side inclined arch ribs, but cannot meet the construction of crossed main and auxiliary arches, or the labor cost, construction period and material cost are extra increased during the construction, and there are great construction safety hazards.

[0003] At the same time, the arch ribs are usually installed in sections during construction. However, the arch rib segments 320 of the double-wing arch bridge are of a spatially shaped shape, and various angles such as the elevation angle and the horizontal angle need to be considered during their installation. Currently, multiple cranes are basically used to turn over the arch rib segments 320, and multiple hand winches are required during the adjustment process. The adjustment process is complicated and cumbersome, and the turning over is difficult. It is also difficult to accurately adjust the inclination angle of the arch rib segments 320, which makes it difficult to accurately match the arch rib segments 320 with the already welded steel box arch ribs when welding the arch rib segments 320 in the later stage. Summary of the invention

[0004] The present invention aims to solve at least one of the above-mentioned problems and provide a lifting device that can conveniently adjust the aerial posture of a heavy object.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A lifting device, comprising:

[0007] A crossbeam, the crossbeam comprising a first end and a second end disposed opposite to each other;

[0008] a first lifting lug, wherein the first lifting lug is installed on the crossbeam and is located at a middle position between the first end and the second end, and the first lifting lug is used to connect with an external hoist;

[0009] A second lifting eye, the second lifting eye is hinged to the second end of the cross beam and can be rotated around a first horizontal axis under force, the first horizontal axis is perpendicular to the length direction of the cross beam, and the second lifting eye is used to connect with an external crane;

[0010] Two suspension rods, the two suspension rods are respectively located at the first end of the cross beam and the second end of the cross beam, each suspension rod comprises a connecting seat and a rod body, the connecting seat is hinged to the cross beam and can be rotated around the first horizontal axis under force, one end of the rod body is hinged to the connecting seat and can be rotated around the second horizontal axis under force, and the second horizontal axis is perpendicular to the first horizontal axis;

[0011] Two longitudinal beams, the two longitudinal beams are respectively hinged to the free ends of the two rods and can be rotated around the second horizontal axis under force, each longitudinal beam is perpendicular to the cross beam, and the longitudinal beams are used to connect with the weight;

[0012] a first telescopic rod, wherein opposite ends of the first telescopic rod are respectively hinged to the second lifting ear and the crossbeam to drive the crossbeam to rotate around the first horizontal axis; and

[0013] Two second telescopic rods are respectively mounted on the two longitudinal beams, and opposite ends of each second telescopic rod are respectively hinged to the corresponding rod body and the longitudinal beam to drive the corresponding longitudinal beam to rotate around the second horizontal axis.

[0014] Furthermore, the first lifting ear is provided with a first hanging hole for hanging with an external crane.

[0015] Furthermore, the second lifting ear is provided with a second hanging hole for hanging with an external crane.

[0016] Furthermore, a mounting hole is provided at the bottom of the crossbeam, and one end of the connecting seat is rotatably mounted at the mounting hole through a pivot member.

[0017] Furthermore, the pivotal member is a latch pin, which is detachably plugged into the mounting hole and can rotate relative to the mounting hole.

[0018] Furthermore, a plurality of the mounting holes are provided at the first end and the second end, and the plurality of mounting holes are distributed at intervals along the length direction of the beam, and the connecting seat is selectively connected to one of the plurality of mounting holes.

[0019] Furthermore, each longitudinal beam has two opposite ends provided with hanging holes for hanging heavy objects.

[0020] Furthermore, the first telescopic rod and the second telescopic rod are both oil cylinders.

[0021] The present invention also provides a construction method for a main and auxiliary arch of a double-wing arch bridge, wherein the main and auxiliary arches of the double-wing arch bridge are both formed by splicing a plurality of arch rib segments, comprising the following steps:

[0022] Install temporary supports;

[0023] Stent pre-compression: performing a stent pre-compression test on the temporary stent;

[0024] Support acceptance: After the inspection indicators of the support pre-compression test meet the construction requirements, the support acceptance stage is entered. The main beam bottom elevation is adjusted according to the data of the pre-compression test. The main beam bottom elevation is calculated as follows: H`=H+P, where H` is the main beam bottom elevation, H is the designed main beam bottom elevation; P is the elastic deformation value of the temporary support pre-compression;

[0025] The arch rib segment hoisting includes the following steps:

[0026] The hinged seat and the sleeper are detachably installed on the installation point of the temporary support;

[0027] Provide the sling as claimed in claim 1, suspend the arch rib segment on the longitudinal beam by a sling rope, connect the hook of the crane to the first lifting lug, move the arch rib segment to the installation point of the temporary support by the crane, make the crossbeam parallel to the longitudinal direction of the bridge, and make the opposite ends of the arch rib segment supported on the hinge seat and the sleeper respectively;

[0028] The connection between the crane hook and the first lifting lug is released, and the crane hook is connected to the second lifting lug, and the first telescopic rod is driven to extend and retract by a preset length, so that the crossbeam is tilted relative to the direction of the bridge, and then the arch rib segment is tilted relative to the direction of the bridge to a preset angle;

[0029] The hinged seat and the sleepers are removed, and the second telescopic rod is driven to extend and retract to a preset length, so that the longitudinal beam is tilted relative to the transverse direction of the bridge, and the arch rib segment is tilted relative to the transverse direction of the bridge to a preset angle;

[0030] The arch rib segments with adjusted inclination angles are assembled at the installation points of temporary supports by crane.

[0031] Furthermore, the temporary support comprises:

[0032] Two main and secondary arch intersection sections, the two main and secondary arch intersection sections are spaced apart along the direction of the bridge, each main and secondary arch intersection section comprises a temporary pier support for the main arch of the intersection section erected along the extension direction of the main arch of the intersection area and a temporary pier support for the secondary arch of the intersection section erected along the extension direction of the secondary arch of the intersection area, the top of the temporary pier support for the main arch of the intersection section is used to support the main arch, the bottom of the temporary pier support for the secondary arch of the intersection section is fixed to the temporary pier support for the main arch of the intersection section, and the top of the temporary pier support for the secondary arch of the intersection section is used to support the secondary arch;

[0033] A main arch non-intersecting section, the main arch non-intersecting section is located between the two main and secondary arch intersecting sections, and the main arch non-intersecting section includes a plurality of temporary pier supports for the main arch of the non-intersecting section erected along the outward inclination direction of the main arch of the non-intersecting section;

[0034] Two first secondary arch non-intersecting sections, the two first secondary arch non-intersecting sections are respectively located on the side of the two main and secondary arch intersecting sections facing away from the main arch non-intersecting sections, and each first secondary arch non-intersecting section includes a plurality of first non-intersecting section secondary arch temporary pier supports erected along the inward inclination direction of the non-intersecting section secondary arch;

[0035] a second secondary arch non-intersecting section, the second secondary arch non-intersecting section is located between the two main and secondary arch intersecting sections and is closer to the main beam of the double-wing arch bridge than the main arch non-intersecting section, the second secondary arch non-intersecting section comprises a plurality of second non-intersecting section secondary arch temporary pier supports erected along the inward inclination direction of the non-intersecting section secondary arch, the second non-intersecting section secondary arch temporary pier supports are supported on the main beam at one side close to the main beam, and the second non-intersecting section secondary arch temporary pier supports are fixed to the main beam support at one side close to the main arch non-intersecting section; and

[0036] The main and auxiliary arch supports are cross-connected, and the main and auxiliary arch supports are cross-connected to connect the second non-intersecting section auxiliary arch temporary pier support and the non-intersecting section main arch temporary pier support.

[0037] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0038] 1. When the above-mentioned lifting device is used, the process of unloading the arch rib segment and transferring it to the lifting point can connect the crane to the first lifting lug located in the middle of the beam, so that the arch rib segment moves in a horizontal posture, thereby making the transfer process smoother and safer; when it is necessary to adjust the aerial posture of the arch rib segment, connect the crane to the second lifting lug located at the end of the beam, and according to the preset installation tilt angle of the arch rib segment, drive the first telescopic rod to extend and retract the preset length to tilt the beam, and adjust the tilt angle of the arch rib segment relative to the longitudinal direction of the bridge, and drive the second telescopic rod to extend and retract the preset length to tilt the longitudinal beam, and adjust the tilt angle of the arch rib segment relative to the transverse direction of the bridge, ensuring that the arch rib segment is positioned to the preset installation tilt angle, that is, completing the adjustment of the aerial posture of the arch rib. The above-mentioned lifting device can be used to adjust the inclination angle of the arch rib, which can be completed with only one crane, without adjusting multiple hand winches, simplifying the adjustment process, and facilitating the adjustment of the aerial posture of the heavy object. Through the cooperation of the first telescopic rod and the second telescopic rod, the inclination angle of the arch rib segment can be accurately adjusted to ensure the installation accuracy of the arch rib segment. When adjusting the aerial posture of the arch rib segment, the crane is connected to the second lifting lug located at the end of the beam, which is more conducive to adjusting the tilt angle.

[0039] 2. Aiming at the shortcomings of the existing construction method in the installation of arch ribs of double-wing arch bridges, the present invention also provides a temporary bracket used in the construction of the main and auxiliary arches of double-wing arch bridges. The main and auxiliary arch support systems are divided by setting the main and auxiliary arch cross sections, the main arch non-cross sections, the auxiliary arch non-cross sections and the main and auxiliary arch bracket cross-connections. The main and auxiliary arch support systems are connected by the main and auxiliary arch bracket cross-connections to ensure the overall force. The arch rib installation is completed through four steps: bracket installation, bracket pre-compression, bracket acceptance and arch rib hoisting. The present invention breaks down the whole into parts, divides the outward-inclined main arch and the inward-inclined auxiliary arch into single-side inclined arch ribs for construction, reduces the cost of labor and materials, shortens the construction period, and improves the safety of construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a schematic diagram of the structure of the double-wing arch bridge from a bird's-eye view.

[0041] Figure 2 It is a schematic diagram of the top view of the temporary support in a preferred embodiment of the present invention.

[0042] Figure 3 for Figure 2 The diagram shows the temporary support in use.

[0043] Figure 4 for Figure 2 The temporary support shown is a front view of the temporary pier support of the main arch in the intersection section and the non-intersection section of the main arch.

[0044] Figure 5 for Figure 2 The temporary support shown is a front view of the main arch temporary pier support of the intersection section, the temporary pier support of the auxiliary arch of the intersection section, the first auxiliary arch non-intersection section and the second auxiliary arch non-intersection section.

[0045] Figure 6 for Figure 2 A schematic cross-sectional view of the temporary support at the cross-connection of the main and secondary arch supports.

[0046] Figure 7 It is a schematic structural diagram of the temporary pier support for the main arch of the intersection section, the temporary pier support for the auxiliary arch of the intersection section, the temporary pier support for the main arch of the non-intersection section, the temporary pier support for the first non-intersection section auxiliary arch and the temporary pier support for the second non-intersection section auxiliary arch in a preferred embodiment of the present invention.

[0047] Figure 8 for Figure 7 Enlarged view at A.

[0048] Fig. 9 for Figure 7 Enlarged view at B.

[0049] Fig.10 It is a schematic diagram of the partial structure of the temporary support at the intersection section of the main and secondary arches in a preferred embodiment of the present invention.

[0050] Fig.11 This is a front view of a lifting device in a preferred embodiment of the present invention, wherein the lifting device is connected to the first lifting eye.

[0051] Fig.12 This is a front view of the sling when the crane is hooked to the second lifting eye in a preferred embodiment of the present invention.

[0052] Fig.13 for Fig.11 The right side view of the lifting device shown with the second lifting eye removed.

[0053] Fig.14 for Fig.11 The diagram shows the sling in use when adjusting the inclination angle of the beam.

[0054] Fig.15 for Fig.13 The diagram shows the sling in use when adjusting the inclination angle of the longitudinal beam.

[0055] Main component symbols

[0056] 100. Temporary support; 2. Intersection of main and secondary arches; 21. Temporary pier support of main arch in intersection section; 23. Temporary pier support of secondary arch in intersection section; 3. Non-intersection section of main arch; 31. Temporary pier support of main arch in non-intersection section; 4. Non-intersection section of first secondary arch; 41. Temporary pier support of secondary arch in first non-intersection section; 5. Non-intersection section of second secondary arch; 51. Temporary pier support of secondary arch in second non-intersection section; 6. Cross-connection of main and secondary arch supports; 61. Upper chord; 63. Lower chord; 65. Abdomen; 67. Diagonal rod; 71. Steel pipe column; 73. Horizontal crossbar; 75. Diagonal brace; 76. Hook; 77. Jack; 78. Wedge block; 79. Pier top beam; 8. Cross-connection between piers; 200. Pile foundation; 300. Double-wing arch bridge; 3 10. Main beam; 320. Arch rib segment; 321. Main arch; 323. Secondary arch; 400. Main beam bracket; 500. Hanger; 510. Crossbeam; 511. First end; 513. Second end; 514. Mounting hole; 520. First lifting eye; 521. First hanging hole; 530. Second lifting eye; 531. Second hanging hole; 540. Hanging rod; 541. Connecting seat; 543. Rod body; 550. Longitudinal beam; 551. Lifting hole; 560. First telescopic rod; 570. Second telescopic rod; 561, 571. Cylinder body; 563, 573. Piston rod; 580. Pivot member; 600. Hook; 700. Articulated seat; 710. Mounting seat; 730. Support seat; 800. Sleeper. DETAILED DESCRIPTION

[0057] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0058] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0060] See also Figures 11 to 13 A preferred embodiment of the present invention provides a sling 500 capable of adjusting the inclination angle of a heavy object, including a crossbeam 510, a first lifting lug 520, a second lifting lug 530, two hanging rods 540, two longitudinal beams 550, a first telescopic rod 560 and two second telescopic rods 570.

[0061] The cross beam 510 is generally in the shape of a long strip, and includes a first end 511 and a second end 513 that are oppositely disposed. A first hanging ear 520 is mounted on the cross beam 510 and is located at a middle position between the first end 511 and the second end 513. The first hanging ear 520 is used to connect with a hook 600 of an external crane. In this embodiment, a first hanging hole 521 for connecting with the hook 600 is provided on the first hanging ear 520.

[0062] The second lifting ear 530 is hinged to the second end 513 of the beam 510, and the second lifting ear 530 can be rotated around the first horizontal axis under force, and the first horizontal axis is perpendicular to the length direction of the beam 510. The second lifting ear 530 is used to connect with an external crane. In this embodiment, the second lifting ear 530 is provided with a second hanging hole 531 for hanging with the external crane hook 600. The second lifting ear 530 is generally L-shaped, and one end of the second lifting ear 530 is hinged to the top surface of the beam 510, and the second hanging hole 531 is provided at the bending part of the L-shaped second lifting ear 530.

[0063] The two suspension rods 540 are respectively located at the first end 511 of the crossbeam 510 and the second end 513 of the crossbeam 510. Each suspension rod 540 includes a connecting seat 541 and a rod body 543, wherein the connecting seat 541 is hinged to the crossbeam 510 and can be rotated around the first horizontal axis under force. Specifically, a mounting hole 514 is provided at the bottom of the crossbeam 510, and the connecting seat 541 is rotatably mounted at the mounting hole 514 through a pivot 580. In this embodiment, the pivot 580 is a latch, and the axis of the latch is parallel to the first horizontal axis. The latch is detachably plugged into the mounting hole 514 and can rotate around the first horizontal axis. The detachable connection between the latch and the mounting hole 514 belongs to the prior art and will not be described here for the sake of space. One end of the rod body 543 is hinged to the connecting seat 541 and can be rotated around the second horizontal axis under force. The second horizontal axis is perpendicular to the first horizontal axis.

[0064] The two longitudinal beams 550 are respectively hinged to the free ends of the two rod bodies 543. Each longitudinal beam 550 is perpendicular to the cross beam 510 and is located on opposite sides of the cross beam 510 with the first hanging hole 521. The longitudinal beam 550 is used to connect with a heavy object. In this embodiment, the heavy object is the arch rib segment 320. The opposite ends of each longitudinal beam 550 are provided with hanging holes 551 for hanging with the heavy object. In this embodiment, the opposite ends of each longitudinal beam 550 are respectively provided with a hanging hole 551. It can be understood that the opposite ends of each longitudinal beam 550 can also be provided with a plurality of hanging holes 551. When in use, different hanging holes 551 can be selected to suspend the heavy object, so that the sling 500 is suitable for the hoisting of heavy objects of different widths.

[0065] In this embodiment, a plurality of mounting holes 514 are provided at the first end 511 of the cross beam 510 and the second end 513 of the cross beam 510. The plurality of mounting holes 514 are spaced apart along the length direction of the cross beam 510, and the connection seat 541 of each suspension rod 540 is selectively connected to one of the plurality of mounting holes 514. By installing the suspension rods 540 at different mounting holes 514, the distance between the two suspension rods 540 can be adjusted, so that the sling 500 is suitable for the slinging of heavy objects of different lengths.

[0066] The opposite ends of the first telescopic rod 560 are respectively hinged to the second lifting lug 530 and the cross beam 510, and are used to adjust the inclination angle of the cross beam 510. In this embodiment, the length direction of the projection of the first telescopic rod 560 on the cross beam 510 is parallel to the length direction of the cross beam 510; the first telescopic rod 560 is a cylinder, the cylinder body 561 of the cylinder is hinged to the free end of the second lifting lug 530, and the free end of the piston rod 563 of the cylinder is hinged to the cross beam 510. In this embodiment, the hinge between the cylinder and the cross beam 510 is located between the first lifting lug 520 and the second end 513. The two second telescopic rods 570 are respectively installed on the two longitudinal beams 550, and are used to adjust the inclination angle of the corresponding longitudinal beams 550. The opposite ends of each second telescopic rod 570 are respectively hinged to the rod body 543 of the corresponding suspension rod 540 and the longitudinal beam 550. In this embodiment, the second telescopic rod 570 is a cylinder, the cylinder body 561 of the second telescopic rod 570 is hinged to the top end of the corresponding rod body 543 , and the free end of the piston rod 563 of the cylinder is hinged to one end of the corresponding longitudinal beam 550 .

[0067] Please also see Figure 1 and Figure 2 The embodiment of the present invention also provides a construction method of the main and auxiliary arches of a double-wing arch bridge, wherein the main and auxiliary arches of the double-wing arch bridge are both spliced ​​by a plurality of arch rib segments 320, comprising the following steps:

[0068] S1: Install a temporary support 100. In this embodiment, the temporary support 100 includes two main and secondary arch crossing sections 2, a main arch non-crossing section 3, two first secondary arch non-crossing sections 4, a second secondary arch non-crossing section 5 and a plurality of main and secondary arch support cross-connections 6.

[0069] Please also see Figure 4 , Figure 5 and Fig.10 The two main and secondary arch intersection sections 2 are spaced apart along the direction of the bridge. Each main and secondary arch intersection section 2 includes an intersection section main arch temporary pier support 21 erected along the extension direction of the main arch 321 of the intersection area and an intersection section secondary arch temporary pier support 23 erected along the extension direction of the secondary arch 323 of the intersection area. The top of the intersection section main arch temporary pier support 21 is used to support the main arch 321 of the intersection area, the bottom of the intersection section secondary arch temporary pier support 23 is fixed to the top of the intersection section main arch temporary pier support 21, and the top of the intersection section secondary arch temporary pier support 23 is used to support the secondary arch 323 of the intersection area.

[0070] Please also see Figures 7 to 9In this embodiment, the temporary pier support 21 of the main arch of the intersection section and the temporary pier support 23 of the secondary arch of the intersection section both include a plurality of steel pipe columns 71, a horizontal cross bar 73 vertically connecting two adjacent steel pipe columns 71, and a diagonal brace 75 connecting two adjacent steel pipe columns 71. The steel pipe columns 71 are arranged vertically. Among them, the bottom end of the steel pipe column 71 of the temporary pier support 21 of the main arch of the intersection section is used to be installed on the pile foundation 200. Preferably, a hook 76 is welded on the side of the bottom end of the steel pipe column 71 to resist pulling; the bottom end of the steel pipe column 71 of the temporary pier support 23 of the secondary arch of the intersection section is fixed to the top end of the steel pipe column 71 of the temporary pier support 21 of the main arch of the intersection section. A pier top cross beam 79 is fixed to the top of the steel pipe column 71, and opposite ends of the pier top cross beam 79 are respectively fixed to two adjacent steel pipe columns 71, wherein the pier top cross beam 79 of the temporary pier support 21 of the main arch of the intersection section is used to support the main arch 321, and the pier top cross beam 79 of the temporary pier support 23 of the secondary arch of the intersection section is used to support the secondary arch 323. The pier top cross beam 79 is preferably made of I-beam.

[0071] Please see again Figure 1 , Figure 2 and Figure 4 The main arch non-intersection section 3 is located between the two main and secondary arch intersection sections 2. The main arch non-intersection section 3 includes a number of non-intersection section main arch temporary pier supports 31 erected along the outward inclination direction of the non-intersection section main arch 321. Please also refer to Figures 7 to 9 In this embodiment, the structure of the temporary pier support 31 of the main arch of the non-intersection section is the same as that of the temporary pier support 21 of the main arch of the intersection section, and both include a plurality of steel pipe columns 71, a horizontal crossbar 73 vertically connecting two adjacent steel pipe columns 71, and a diagonal brace 75 connecting two adjacent steel pipe columns 71. The steel pipe column 71 is vertically arranged, and the bottom end of the steel pipe column 71 is used to be installed on the pile foundation 200. Preferably, a hook 76 is welded on the side of the bottom end of the steel pipe column 71 to resist pulling. A pier top crossbeam 79 for supporting the main arch 321 is fixed to the top of the steel pipe column 71.

[0072] Please also see Figure 1 , Figure 2 and Figure 5 The two first secondary arch non-intersecting sections 4 are respectively located on the side of the two main secondary arch intersecting sections 2 facing away from the main arch non-intersecting section 3. Each first secondary arch non-intersecting section 4 includes a plurality of first non-intersecting section secondary arch temporary pier supports 41 erected along the inward inclination direction of the non-intersecting section secondary arch 323. Please also refer to Figures 7 to 9In this embodiment, the structure of the temporary pier support 41 of the first non-intersecting section secondary arch is the same as that of the temporary pier support 21 of the crossing section main arch, and both include a plurality of steel pipe columns 71, a horizontal cross bar 73 vertically connecting two adjacent steel pipe columns 71, and a diagonal brace 75 connecting two adjacent steel pipe columns 71. The steel pipe column 71 is vertically arranged, and the bottom end of the steel pipe column 71 is used to be installed on the pile foundation 200. Preferably, a hook 76 is welded on the side of the bottom end of the steel pipe column 71 to resist pulling. A pier top cross beam 79 for supporting the secondary arch 323 is fixed to the top of the steel pipe column 71.

[0073] Please also see Figure 6 The second secondary arch non-intersection section 5 is located between the two main and secondary arch intersection sections 2, and is closer to the main beam 310 of the double-wing arch bridge 300 than the main arch non-intersection section 3. The second secondary arch non-intersection section 5 includes a plurality of second non-intersection section secondary arch temporary pier supports 51 erected along the inward inclination direction of the non-intersection section secondary arch 323. The side of the second non-intersection section secondary arch temporary pier support 51 close to the main beam 310 is supported on the main beam 310, and the side of the second non-intersection section secondary arch temporary pier support 51 close to the main arch non-intersection section 3 is fixed to the main beam support 400.

[0074] Please also see Figures 7 to 9 In this embodiment, the structure of the temporary pier support 51 of the second non-intersecting section secondary arch is roughly the same as the structure of the temporary pier support 21 of the crossing section main arch, and both include a plurality of steel pipe columns 71, a horizontal cross bar 73 vertically connecting two adjacent steel pipe columns 71, and a diagonal brace 75 connecting two adjacent steel pipe columns 71. The steel pipe columns 71 are arranged vertically, wherein the bottom end of the steel pipe column 71 on the side close to the main beam 310 is supported on the main beam 310, and the bottom end of the steel pipe column 71 on the side close to the non-intersecting section 3 of the main arch is fixed to the main beam support 400. The main beam support 400 is a temporary support for the construction of the main beam 310, and its structure belongs to the prior art. In order to omit space, it will not be repeated here. Preferably, the steel pipe column 71 of the temporary pier support 51 of the second non-intersecting section secondary arch is coaxial with the steel pipe column of the main beam support 400 to ensure that the load of the secondary arch segment can be vertically transmitted to the support foundation through the main beam 310 and the main beam support 400.

[0075] The main and secondary arch support cross-link 6 connects the second non-intersecting section secondary arch temporary pier support 51 and the non-intersecting section main arch temporary pier support 31. In this embodiment, the main and secondary arch support cross-link 6 is horizontally arranged, and the main and secondary arch support cross-link 6 connects the steel pipe column 71 of the second non-intersecting section secondary arch temporary pier support 51 and the steel pipe column 71 of the non-intersecting section main arch temporary pier support 31; the main and secondary arch support cross-link 6 includes multiple groups, and the multiple groups of main and secondary arch support cross-links 6 are arranged at intervals along the bridge direction, and each group of main and secondary arch support cross-links 6 is provided with multiple main and secondary arch support cross-links 6 in the vertical direction. Each main and secondary arch support cross-link 6 includes an upper chord 61, a lower chord 63, a web 65 and an oblique rod 67. The upper chord 61 and the lower chord 63 are arranged at intervals in the vertical direction, and the upper chord 61 and the lower chord 63 are parallel to the horizontal direction, and the opposite ends of the upper chord 61 and the opposite ends of the lower chord 63 are respectively vertically fixed to the steel pipe column 71 of the second non-intersecting section secondary arch temporary pier support 51 and the steel pipe column 71 of the non-intersecting section main arch temporary pier support 31. The web member 65 is vertically connected to the upper chord 61 and the lower chord 63. The oblique rod 67 is arranged obliquely, and its opposite ends are respectively connected to the upper chord 61 and the lower chord 63.

[0076] In this embodiment, the inter-pier cross-links 8 are arranged at a preset step distance between the temporary pier supports 21 of the main arch of the crossing section, between the temporary pier supports 23 of the secondary arch of the crossing section, between the temporary pier supports 31 of the main arch of the non-crossing section, between the temporary pier supports 41 of the first non-crossing section, and between the temporary pier supports 51 of the secondary arch of the second non-crossing section, and the opposite ends of the inter-pier cross-links 8 are respectively connected to corresponding steel pipe columns 71, and the step distance can be designed according to the actual working conditions. The inter-pier cross-links 8 can further improve the integrity and stability of the temporary support 100.

[0077] Please see again Figures 7 to 9 The jacks 77 are fixed on the top cross beams 79 of the temporary pier support 21 of the main arch of the crossing section, the top cross beams 79 of the temporary pier support 23 of the auxiliary arch of the crossing section, the top cross beams 79 of the temporary pier support 31 of the main arch of the non-crossing section, the top cross beams 79 of the temporary pier support 41 of the auxiliary arch of the first non-crossing section, and the top cross beams 79 of the temporary pier support 51 of the auxiliary arch of the second non-crossing section. The jacks 77 are connected to the wedge blocks 78, and the wedge blocks 78 are used to support the main arch 321 or the auxiliary arch 323. When in use, the wedge blocks 78 can be driven to move vertically by the jacks 77, and then the height position of the wedge blocks 78 can be adjusted to further ensure that the main arch 321 or the auxiliary arch 323 can be supported on the temporary support 100.

[0078] S2, support preloading: A support preloading test is performed on the temporary support 100 to verify the stability of the temporary support 100. The preloading load is loaded in 4 times during the support preloading. To be as realistic as possible, the preloading load is added by simulating the weight distribution of the beam. In this embodiment, a precast concrete block is used on the top of the temporary support 100 for preloading, and a lifting ring is set on the top of the precast concrete block for easy lifting. During the preloading test, an electronic level was used. Based on the one-stop observation of the national elevation system, the average value was taken for three measurements, and the readings were recorded with an accuracy of 0.1 mm. The preloading mainly collected the following data: ① the settlement data of the temporary pier support 21 of the main arch of the intersection section, the temporary pier support 23 of the secondary arch of the intersection section, the temporary pier support 31 of the main arch of the non-intersection section, the temporary pier support 41 of the secondary arch of the first non-intersection section, and the temporary pier support 51 of the secondary arch of the second non-intersection section; ② the deflection of the pier top crossbeam 79; ③ the lateral deformation of the temporary pier support 21 of the main arch of the intersection section, the temporary pier support 23 of the secondary arch of the intersection section, the temporary pier support 31 of the main arch of the non-intersection section, the temporary pier support 41 of the secondary arch of the first non-intersection section, and the temporary pier support 51 of the secondary arch of the second non-intersection section; ④ the overall deformation of the temporary pier support 21 of the main arch of the intersection section, the temporary pier support 23 of the secondary arch of the intersection section, the temporary pier support 31 of the main arch of the non-intersection section, the temporary pier support 41 of the secondary arch of the first non-intersection section, and the temporary pier support 51 of the secondary arch of the second non-intersection section. The operation of the preloading test belongs to the prior art and will not be described here for the sake of space saving.

[0079] Preferably, the preload considers the most unfavorable load condition, that is, 1 / 2 of the maximum weight of two adjacent arch rib segments 320. In this embodiment, the first load is 25% of the weight of the arch rib segment, the second load is 75% of the weight of the arch rib segment, the third load is 100% of the weight of the arch rib segment, and the fourth load is 110% of the weight of the arch rib segment. Each load is maintained for 24 hours to further improve production safety.

[0080] S3: Support acceptance: After the inspection indicators of the support pre-stressing test meet the construction requirements, the support acceptance stage is entered. The corresponding main beam bottom elevation is adjusted according to the data of the pre-stressing test. The main beam bottom elevation is calculated as follows: H`=H+P, where H` is the main beam bottom elevation, H is the designed main beam bottom elevation; P is the elastic deformation value of the pre-stressing of the temporary pier support 21 of the main arch of the intersection section, the temporary pier support 23 of the secondary arch of the intersection section, the temporary pier support 31 of the main arch of the non-intersection section, the temporary pier support 41 of the first non-intersection section secondary arch and the temporary pier support 51 of the second non-intersection section secondary arch.

[0081] S4: Lifting of arch rib segment 320, including the following steps:

[0082] S41: Please also see Fig.11 and Fig.12, the articulated seat 700 and the sleeper 800 are detachably mounted on the mounting point of the temporary support 100. In this embodiment, the articulated seat 700 and the sleeper 800 are detachably mounted on the corresponding mounting points of the pier top crossbeam 79 of the temporary pier support 21 of the main arch of the intersection section, the corresponding mounting points of the pier top crossbeam 79 of the temporary pier support 23 of the secondary arch of the intersection section, the corresponding mounting points of the pier top crossbeam 79 of the temporary pier support 31 of the main arch of the non-intersection section, the corresponding mounting points of the pier top crossbeam 79 of the temporary pier support 41 of the first non-intersection section, and the corresponding mounting points of the pier top crossbeam 79 of the temporary pier support 51 of the secondary arch of the second non-intersection section. Please refer to Fig.14 In this embodiment, the hinge seat 700 includes a mounting seat 710 and a support seat 730 hinged to the mounting seat 710. The mounting seat 710 is detachably connected to the corresponding pier top cross beam 79 by bolts, etc. The support seat 730 is used to place the supporting arch rib segment 320. The sleeper 800 is placed on the pier top cross beam 79.

[0083] S42: Provide a sling 500, suspend the arch rib segment 320 on the sling hole 551 of the longitudinal beam 550 through a sling rope, so that the cross beam 510 is parallel to the longitudinal direction of the bridge; connect the hook 600 of the crane to the first lifting lug 520, unload the arch rib segment 320 by the crane and move it to the installation point of the temporary support 100, and support the opposite ends of the arch rib segment 320 on the support seat 730 of the hinge seat 700 and the sleeper 800 respectively ( Fig.12 Since the first lifting lug 520 is located in the middle of the crossbeam 510 and the weight of the arch rib segment 320 is much greater than the weight of the second lifting lug 530 and the first telescopic rod 560, when the arch rib segment 320 is suspended on the hanger 500, the arch rib segment 320 can be kept horizontal.

[0084] S43: Release the connection between the crane hook 600 and the first lifting lug 520, connect the crane hook 600 to the second lifting lug 530, drive the first telescopic rod 560 to extend or retract a preset length, so that the cross beam 510 is tilted relative to the longitudinal direction of the bridge, and then the arch rib segment 320 is tilted relative to the longitudinal direction of the bridge to a preset angle α ( Fig.14 );

[0085] S44: Remove the hinge seat 700 and the sleeper 800, drive the second telescopic rod 570 to extend or retract a preset length, so that the longitudinal beam 550 is tilted relative to the transverse bridge direction, and then the arch rib segment 320 is tilted relative to the transverse bridge direction to a preset angle β ( Fig.15 );

[0086] S45: The arch rib segment 320 with the adjusted inclination angle is assembled at the installation point of the temporary support 100 by means of a crane.

[0087] During hoisting, the main arch 321 can be hoisted first, and then the auxiliary arch 323 can be hoisted, or the main arch 321 and the auxiliary arch 323 can be hoisted simultaneously. The arch rib segment 320 is hoisted to the pier top crossbeam 79 of the temporary support 100, and the height of the jack 77 is adjusted to keep the adjusted inclination angle of the arch rib segment 320 after the beam is dropped.

[0088] When the above-mentioned lifting device 500 is in use, the process of unloading the arch rib segment 320 and transporting it to the installation point can connect the crane to the first lifting ear 520 located in the middle position of the beam 510, so that the arch rib segment 320 can move in a horizontal posture, making the transportation process smoother and safer; when it is necessary to adjust the aerial posture of the arch rib segment 320, connect the crane to the second lifting ear 530 located at the end of the beam 510, and according to the preset installation inclination angle of the arch rib segment 320, drive the first telescopic rod 560 to extend or retract a preset length to tilt the beam 510, and the inclination angle of the arch rib segment 320 relative to the longitudinal direction of the bridge can be adjusted, and drive the second telescopic rod 570 to extend or retract a preset length to tilt the longitudinal beam 550, and the inclination angle of the arch rib segment 320 relative to the transverse direction of the bridge can be adjusted, ensuring that the arch rib segment 320 is positioned at the preset installation inclination angle, that is, the adjustment of the aerial posture of the arch rib segment 320 is completed. The above-mentioned lifting device 500 is used to adjust the inclination angle of the arch rib, which can be completed with only one crane, without adjusting multiple hand winches, simplifying the adjustment process. Through the cooperation of the first telescopic rod 560 and the second telescopic rod 570, the inclination angle of the arch rib segment 320 can be accurately adjusted to ensure the installation accuracy of the arch rib segment 320. When adjusting the aerial posture of the arch rib segment 320, the crane is connected to the second lifting ear 530 at the end of the beam 510, which is more conducive to the adjustment of the inclination angle.

[0089] At the same time, each suspension rod 540 includes a connection seat 541 and a rod body 543, the rod body 543 is rotatably connected to the connection seat 541, the connection seat 541 is rotatably connected to the cross beam 510, and the rotation axis of the connection seat 541 relative to the cross beam 510 and the rotation axis of the rod body 543 relative to the connection seat 541 are perpendicular to each other. This arrangement can further improve the balance of the sling 100 when in use, ensure that the cross beam 510 and the second lifting lug 530 are located in the vertical plane during the lifting process, effectively prevent the sling 100 from being separated from the external crane, and further improve production safety. And through this arrangement, it can be adjusted to the inclination angle of the cross beam 510 and the inclination angle of the longitudinal beam 550 without interfering with each other, further improving the accuracy of adjustment.

[0090] In view of the shortcomings of the existing construction method in the installation of the arch rib segment 320 of the double-wing arch bridge 300, the embodiment of the present invention also provides a temporary bracket 100 for the construction of the main and auxiliary arches of the double-wing arch bridge, by setting several parts such as the main and auxiliary arch crossing section 2, the main arch non-crossing section 3, the auxiliary arch non-crossing section and the main and auxiliary arch bracket cross-link 6, the main and auxiliary arch support system is divided, and the main and auxiliary arch bracket cross-link 6 is used to connect each support system to ensure the overall force, and the installation of the arch rib segment 320 is completed through four steps: bracket installation, bracket pre-compression, bracket acceptance, and arch rib segment 320 hoisting. The present invention breaks the whole into parts, divides the outward-inclined main arch 321 and the inward-inclined auxiliary arch 323 into single-sided inclined arch ribs for construction, and makes full use of the main beam 310 and the main beam bracket 400, so that the hoisting of the main arch 321 and the auxiliary arch 323 will not affect each other, reducing the cost of labor and materials, shortening the construction period, and improving the safety of construction.

[0091] It is understandable that the first lifting lug 520 and the second lifting lug 530 can also be connected to the crane through structures such as the hook 600. The first lifting lug 520 and the second lifting lug 530 can also be connected to the crane by providing structures such as hooks.

[0092] It is understood that the control of the first telescopic rod 560 and the second telescopic rod 570 can be performed by wireless remote control. For example, the invention patent with the Chinese announcement number CN103274300B discloses how to control the extension and contraction of the oil cylinder by remote control, which belongs to the prior art and is omitted here for the sake of space. It is understood that the first telescopic rod 560 and the second telescopic rod 570 are not limited to the oil cylinder, and they can adopt other telescopic structures such as electric telescopic rods in the prior art as needed.

[0093] It can be understood that the sling 500 can also be used for the slinging of other heavy objects that require adjustment of the tilt angle.

[0094] The above description is a detailed description of the preferred feasible embodiments of the present invention, but the embodiments are not intended to limit the scope of the patent application of the present invention. All equivalent changes or modified changes completed under the technical spirit suggested by the present invention should fall within the patent scope covered by the present invention.

Claims

1. A construction method for a main and secondary arch of a double-wing arch bridge, wherein the main and secondary arches of the double-wing arch bridge are both formed by splicing a plurality of arch rib segments (320), characterized in that: The following steps are included: Install a temporary support (100); Stent pre-compression: performing a stent pre-compression experiment on the temporary stent (100); Support acceptance: After the inspection indicators of the support pre-compression test meet the construction requirements, the support acceptance stage is entered. The main beam bottom elevation is adjusted according to the data of the pre-compression test. The main beam bottom elevation is calculated as follows: H`=H+P, where H` is the main beam bottom elevation, H is the designed main beam bottom elevation; P is the elastic deformation value of the temporary support pre-compression; The hoisting of the arch rib segment (320) includes the following steps: The hinged seat (700) and the sleeper (800) are detachably mounted on the mounting point of the temporary support (100); A sling (500) is provided, the sling (500) comprising: A crossbeam (510), the crossbeam (510) comprising a first end (511) and a second end (513) arranged opposite to each other; a first lifting lug (520), the first lifting lug (520) being mounted on the crossbeam (510) and being located at a middle position between the first end (511) and the second end (513), the first lifting lug (520) being used to connect to an external crane; a second lifting eye (530), the second lifting eye (530) being hinged to the second end (513) of the crossbeam (510) and capable of rotating around a first horizontal axis under force, the first horizontal axis being perpendicular to the length direction of the crossbeam (510), the second lifting eye (530) being used to connect to an external crane; Two suspension rods (540), the two suspension rods (540) are respectively located at the first end (511) of the cross beam (510) and the second end (513) of the cross beam (510), each suspension rod (540) comprises a connecting seat (541) and a rod body (543), the connecting seat (541) is hinged to the cross beam (510) and can be rotated around the first horizontal axis under force, one end of the rod body (543) is hinged to the connecting seat (541) and can be rotated around the second horizontal axis under force, and the second horizontal axis is perpendicular to the first horizontal axis; Two longitudinal beams (550), the two longitudinal beams (550) are respectively hinged to the free ends of the two rod bodies (543) and can be rotated around the second horizontal axis under force, each longitudinal beam (550) is perpendicular to the cross beam (510), and the longitudinal beams (550) are used to connect to a heavy object; a first telescopic rod (560), wherein opposite ends of the first telescopic rod (560) are respectively hinged to the second lifting ear (530) and the crossbeam (510) to drive the crossbeam (510) to rotate around the first horizontal axis; and Two second telescopic rods (570), the two second telescopic rods (570) are respectively mounted on the two longitudinal beams (550), and opposite ends of each second telescopic rod (570) are respectively hinged to the corresponding rod body (543) and the longitudinal beam (550) to drive the corresponding longitudinal beam (550) to rotate around the second horizontal axis; The arch rib segment (320) is suspended on the longitudinal beam (550) by a lifting rope, the hook (600) of the crane is connected to the first lifting lug (520), and the arch rib segment (320) is moved to the installation point of the temporary support (100) by the crane, and the cross beam (510) is parallel to the longitudinal direction of the bridge, and the opposite ends of the arch rib segment (320) are supported on the hinge seat (700) and the sleeper (800) respectively; The connection between the crane hook (600) and the first lifting lug (520) is released, and the crane hook (600) is connected to the second lifting lug (530), and the first telescopic rod (560) is driven to extend and retract by a preset length, so that the crossbeam (510) is tilted relative to the direction of the bridge, thereby tilting the arch rib segment (320) relative to the direction of the bridge to a preset angle; The hinged seat (700) and the sleeper (800) are removed, and the second telescopic rod (570) is driven to extend or retract to a preset length, so that the longitudinal beam (550) is tilted relative to the transverse direction of the bridge, thereby tilting the arch rib segment (320) relative to the transverse direction of the bridge to a preset angle; The arch rib segment (320) with the tilt angle adjusted is assembled at the installation point of the temporary support (100) by means of a crane.

2. The construction method of the main and secondary arches of the double-wing arch bridge according to claim 1, characterized in that: The first lifting eye (520) is provided with a first hanging hole (521) for hanging with an external crane.

3. The construction method of the main and secondary arches of the double-wing arch bridge according to claim 1, characterized in that: The second lifting eye (530) is provided with a second hanging hole (531) for hanging with an external crane.

4. The construction method of the main and secondary arches of the double-wing arch bridge according to claim 1, characterized in that: A mounting hole (514) is provided at the bottom of the crossbeam (510), and one end of the connecting seat (541) is rotatably mounted on the mounting hole (514) via a pivot member (580).

5. The construction method of the main and secondary arches of the double-wing arch bridge according to claim 4, characterized in that: The pivotal member (580) is a latch pin, which is detachably plugged into the mounting hole (514) and is capable of rotating relative to the mounting hole (514).

6. The construction method of the main and secondary arches of the double-wing arch bridge according to claim 4, characterized in that: The first end (511) and the second end (513) are both provided with a plurality of mounting holes (514), the plurality of mounting holes (514) being distributed at intervals along the length direction of the crossbeam (510), and the connecting seat (541) is selectively connected to one of the plurality of mounting holes (514).

7. The construction method of the main and secondary arches of the double-wing arch bridge according to claim 1, characterized in that: Each longitudinal beam (550) is provided with hanging holes (551) at opposite ends thereof for hanging a heavy object.

8. The construction method of the main and secondary arches of the double-wing arch bridge according to claim 1, characterized in that: The first telescopic rod (560) and the second telescopic rod (570) are both oil cylinders.

9. The construction method of the main and secondary arches of the double-wing arch bridge according to claim 1, characterized in that: The temporary support (100) comprises: Two main and secondary arch crossing sections (2), the two main and secondary arch crossing sections (2) being spaced apart along the direction of the bridge, each main and secondary arch crossing section (2) comprising a crossing section main arch temporary pier support (21) erected along the extension direction of the crossing section main arch (321) and a crossing section secondary arch temporary pier support (23) erected along the extension direction of the crossing section secondary arch (323), the top of the crossing section main arch temporary pier support (21) being used to support the main arch (321), the bottom of the crossing section secondary arch temporary pier support (23) being fixed to the crossing section main arch temporary pier support (21), and the top of the crossing section secondary arch temporary pier support (23) being used to support the secondary arch (323); A main arch non-intersecting section (3), the main arch non-intersecting section (3) being located between the two main and secondary arch intersecting sections (2), the main arch non-intersecting section (3) comprising a plurality of non-intersecting section main arch temporary pier supports (31) erected along the outward inclination direction of the non-intersecting section main arch (321); Two first secondary arch non-intersecting sections (4), the two first secondary arch non-intersecting sections (4) are respectively located on a side of the two main and secondary arch intersecting sections (2) facing away from the main arch non-intersecting section (3), each first secondary arch non-intersecting section (4) comprising a plurality of first non-intersecting section secondary arch temporary pier supports (41) erected along the inward inclination direction of the non-intersecting section secondary arch (323); a second secondary arch non-intersecting section (5), the second secondary arch non-intersecting section (5) being located between the two main and secondary arch intersecting sections (2) and being closer to the main beam (310) of the double-wing arch bridge (300) than the main arch non-intersecting section (3), the second secondary arch non-intersecting section (5) comprising a plurality of second non-intersecting section secondary arch temporary pier supports (51) erected along the inward inclination direction of the non-intersecting section secondary arch (323), the second non-intersecting section secondary arch temporary pier supports (51) being supported on the main beam (310) at one side thereof close to the main beam (310), and the second non-intersecting section secondary arch temporary pier supports (51) being fixed to the main beam support (400) at one side thereof close to the main arch non-intersecting section (3); and A main and secondary arch support cross-connection (6), wherein the main and secondary arch support cross-connection (6) connects the second non-intersecting section secondary arch temporary pier support (51) and the non-intersecting section main arch temporary pier support (31).

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