System and method for installing a through-water decked steel box arch tied-arch bridge

Abstract

The application discloses a system and method for installing a cross-water area through-type steel box arch rib tied-arch bridge, and belongs to the technical field of bridge construction. A shore crane is arranged on the land at one end of a steel box arch rib tied-arch bridge to be erected, is used for erecting a sliding transportation system starting platform and a bridge lifting crane starting platform, and the sliding transportation system starting platform and the bridge lifting crane starting platform are respectively provided with the sliding transportation system and the bridge lifting crane. The sliding transportation system is used for transporting components forward. The bridge lifting crane is used for installing middle structures of steel lattice beams and arch rib support structures by alternately hoisting and feeding two distribution beams arranged below to realize self-walking along the longitudinal bridge. A floating crane is arranged in a water area crossed by the arch bridge and is used for installing underwater supports, outer ring structures of steel lattice beams and steel box arch rib structures. In the application, the bridge lifting crane and the sliding transportation system are not affected by each other, the difficulty of moving the crane to the bridge can be reduced, the flexibility of the crane in installing the steel lattice beam is improved, and therefore the construction efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of bridge construction, and particularly relates to a system and method for installing a through-type steel box arch rib tied-arch bridge across a water area. BACKGROUND

[0002] The through-type steel box tied-arch bridge is a representative bridge structure form in the arch-type combined system bridge, adopts the through-type steel box girder as the main load-bearing component, and enhances the stability and load-bearing capacity of the bridge through the tie rod. Its main construction methods include the support method, including the first beam and then arch, less support, no support method first arch and then beam, and beam and arch pushing method, etc.

[0003] The following problems exist in the construction of the through-type steel box arch rib tied-arch bridge across the water area by the support method first beam and then arch: the steel trestle needs to be erected on the water, and when the crane or gantry crane on the trestle is used for hoisting operation, the hoisting height cannot meet the installation requirements of the main girder and the arch rib at the same time. In addition, the erection of the steel trestle takes a long time and affects navigation. When the floating crane is used for hoisting operation in the water, the large-tonnage floating crane is used for hoisting, the mechanical platform cost is too high, the economic benefit is poor when small components are hoisted, the small-tonnage floating crane is used for hoisting, the main girder is segmented, the overall performance of the bridge is poor, the hoisting times cannot meet the requirements, and the floating crane is greatly affected by the passing ships and water level during long-time operation. When the crane is used for hoisting operation on the bridge, the steel lattice girder is open, the crane is difficult to move, and the hoisting efficiency is low.

[0004] The construction method and system for progressively assembling the steel box tied-arch bridge are disclosed in Chinese patent application No. CN115323931A, which uses a full-rotation crane to hoist a plurality of segment steel main girders along the longitudinal direction of the bridge, the first segment steel main girder is hoisted by the full-rotation crane on the steel platform, and the subsequent segment steel main girders are hoisted by the full-rotation crane on the completed steel main girder; the full-rotation crane is used to hoist a plurality of segment steel box arch ribs in the direction opposite to the construction direction of the steel main girder. However, in the actual construction process, due to the narrow bridge deck and large crane model, the full-rotation crane and the longitudinal moving trolley are arranged along the longitudinal direction of the bridge, and the longitudinal moving trolley track needs to be removed before the full-rotation crane retreats, so the full-rotation crane can retreat after the longitudinal moving trolley retreats. The flexibility of the crane on the bridge is low, and it is only suitable for one-way installation of the crane.

[0005] Therefore, it is urgent to provide an installation method capable of flexibly moving the crane and improving the installation efficiency of the steel box tied-arch bridge. SUMMARY

[0006] The present application aims to solve the problems in the prior art and provide a system and method for installing a through-type steel box arch rib tied-arch bridge across a water area.

[0007] The specific technical solutions adopted by the present application are as follows:

[0008] In a first aspect, the present application provides a system for installing a through-water decked steel box ribbed arch tied-arch bridge, comprising a shore crane, a sliding transportation system starting platform, a bridge hoist starting platform, a floating crane, a water support, a sliding transportation system, a bridge hoist and a distribution beam.

[0009] The shore crane is arranged on the land at one end of the steel box ribbed arch tied-arch bridge to be erected, and is used to erect the sliding transportation system starting platform and the bridge hoist starting platform. The sliding transportation system starting platform and the bridge hoist starting platform are respectively arranged with the sliding transportation system and the bridge hoist.

[0010] The bridge hoist is arranged below the two distribution beams, and is used to realize self-walking along the longitudinal direction of the bridge by alternately hoisting the two distribution beams. The bridge hoist is used to install the middle structure of the steel lattice beam and the arch rib support structure of the steel box ribbed arch tied-arch bridge to be erected.

[0011] The sliding transportation system starting platform comprises two track beams and a platform support. The track beams are provided with tracks, and the sliding transportation system is arranged on the tracks to form a sliding pair therebetween, so that the sliding transportation system moves back and forth on the tracks to transport the middle structure members and the arch rib support members.

[0012] The floating crane is arranged in the water area crossed by the steel box ribbed arch tied-arch bridge to be erected, and is used to install the water support, the outer ring structure of the steel lattice beam and the steel box ribbed structure of the steel box ribbed arch tied-arch bridge to be erected. The water support is used to support the outer ring structure of the steel lattice beam.

[0013] Preferably, the starting platform of the sliding transportation system starting platform and the bridge hoist starting platform has the same top elevation as the top elevation of the steel lattice beam, and the erection width of the starting platform does not exceed the width of the steel lattice beam.

[0014] Preferably, the sliding transportation system comprises four sliding transportation devices, and two sliding transportation devices are arranged on each track beam. The two sliding transportation devices on the same track beam are connected by a rigid rod. Transporting distribution beam devices for transporting the distribution beams are arranged between the two parallel sliding transportation devices.

[0015] Further, a jack is arranged on the top of each sliding transportation device. The jack is a three-dimensional adjusting jack, which is used to adjust the position of the member.

[0016] Preferably, the connecting portions of the two distribution beams are provided with socket-type interfaces, so that the two distribution beams are connected by socket connection. Fasteners are also arranged at the connecting portions of the two distribution beams to fixedly connect the two distribution beams, so as to avoid displacement and eccentric loading during the walking or hoisting of the bridge hoist.

[0017] Further, the fasteners are pins.

[0018] Preferably, the distribution beams are three-spliced I-beams.

[0019] As preferred, the floating crane is a large-tonnage floating crane. The overbridge crane is a small-tonnage crane.

[0020] As preferred, the distribution beams are placed on the end cross beams of the starting platform of the overbridge crane or the outer ring structure of the installed steel lattice beam, or the middle cross beams of the middle structure of the steel lattice beam, to ensure that there are three cross beams for support.

[0021] In a second aspect, the present application provides a construction method for installing a tied-arch bridge with a system for installing a tied-arch bridge with a tied-arch bridge across a water area, and the specific steps are as follows:

[0022] S1: After the pier foundation construction at both ends of the steel box arch tied-arch bridge to be erected is completed, the starting platform of the sliding transportation system and the starting platform of the overbridge crane are erected at one end of the pier foundation by using the shore crane.

[0023] S2: The sliding transportation system is hoisted onto the starting platform of the sliding transportation system by using the shore crane. The track beams in the starting platform of the sliding transportation system are laid on the track, and the sliding transportation system is arranged on the track, forming a sliding pair therebetween, so that the sliding transportation system moves back and forth on the track. The overbridge crane is arranged on the two distribution beams of the starting platform of the overbridge crane by using the shore crane. The two distribution beams are arranged longitudinally in front of and behind each other, and the two distribution beams are connected by detachable sockets. The starting section of the outer ring structure of the steel lattice beam is installed along the longitudinal direction of the bridge by using the floating crane from the end close to the starting platform of the overbridge crane. The outer ring structure of the steel lattice beam is composed of a plurality of outer ring structure members.

[0024] S3: The subsequent sections of the outer ring structure of the steel lattice beam are installed by using the floating crane, and the middle structure of the steel lattice beam is installed along the longitudinal direction of the bridge by using the overbridge crane. The installation progress of the middle structure of the steel lattice beam lags behind the outer ring structure of the steel lattice beam by more than one section. The middle structure of the steel lattice beam is composed of a plurality of middle structure members.

[0025] S31: On the starting platform of the overbridge crane, the first middle structure member is installed between the first outer ring structure member by using the overbridge crane. The track beams and the track in the starting platform of the sliding transportation system are laid on the installed first middle structure member. The second middle structure member is hoisted onto the sliding transportation system on the starting platform of the sliding transportation system by using the shore crane, and the second middle structure member is transported to the hoisting range of the overbridge crane through the track. The second middle structure member is installed between the second outer ring structure member by using the overbridge crane.

[0026] The step S31 is repeated, and the middle structure members are installed in sections and advanced forward until the middle structure of the steel lattice beam is completely installed.

[0027] S4: install the arch rib support structure by using the upper bridge crane. The arch rib support structure is composed of a plurality of arch rib support members. The transportation and installation process of the arch rib support members is consistent with that of the intermediate structure members in step S31, until the arch rib support structure is completely installed.

[0028] S5: install the steel box arch rib structure by using the floating crane. The steel box arch rib structure includes steel box arch rib members at both ends of the bridge and steel box arch rib closure segment members in the middle. According to the installation progress of the arch rib support members in step S4, the steel box arch rib members are installed in segments on the arch rib support members. The installation of the steel box arch rib structure is first from the end away from the starting platform of the upper bridge crane to the center of the bridge span, then from the end close to the starting platform of the upper bridge crane to the center of the bridge span, and finally the steel box arch rib closure segment members are installed between the two steel box arch rib members in the middle.

[0029] S6: remove the arch rib support structure from the end away from the starting platform of the upper bridge crane along the longitudinal bridge. The arch rib support members are removed in sequence by using the upper bridge crane, the removal direction is opposite to the installation direction, until the upper bridge crane moves to the starting platform of the upper bridge crane. In the process of removal, the bridge deck and the boom are installed in sequence, and the track beam and the track are removed in segments, until the sliding transportation system moves to the starting platform of the sliding transportation system. The installation of the through steel box arch rib tied arch bridge across the water area is completed.

[0030] Compared with the prior art, the present application has the following beneficial effects:

[0031] (1) The present application adopts a collaborative construction method of multiple cranes, installs large-section steel lattice beam outer ring structures and steel box arch rib structures by using large-tonnage floating cranes, installs small-section steel lattice beam outer ring structures and arch rib support structures by using small-tonnage upper bridge cranes, and transports components with the cooperation of the sliding transportation system and the shore crane, which can improve the installation efficiency of the through steel box tied arch bridge support method, reduce the time affecting water navigation, shorten the construction period of the through steel box tied arch bridge, and improve the construction efficiency. Moreover, by optimizing the specifications of the cranes, the installation cost is reduced.

[0032] (2) The upper bridge crane and the sliding transportation system provided by the present application are arranged transversely along the bridge in parallel, and the upper bridge crane and the sliding transportation system do not affect each other when moving longitudinally along the bridge. This can reduce the difficulty of moving the crane along the bridge, improve the flexibility of the crane in installing the open steel lattice beam, and improve the stability of the component during sliding transportation to prevent overturning.

[0033] (3) The sliding transportation device provided by the present application is provided with three-dimensional adjusting jacks, which can be adjusted in three dimensions during component transportation, improving the stability of the component during sliding transportation to prevent overturning. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1A schematic diagram of the starting platform and the upper bridge crane starting platform of the sliding transport system provided in the embodiment;

[0035] Figure 2 A schematic diagram of the distribution beam provided in the embodiment;

[0036] Figure 3 A schematic diagram of the distribution beam socket interface provided in the embodiment;

[0037] Figure 4 A schematic diagram of the distribution beam fixed connection provided in the embodiment;

[0038] Figure 5 A schematic diagram of the sliding transport system provided in the embodiment;

[0039] Figure 6 A schematic diagram of the sliding transport device provided in the embodiment;

[0040] Figure 7 A schematic diagram of the installation of the shore pier column foundation in the embodiment;

[0041] Figure 8 A schematic diagram of the starting platform and the underwater support provided in the embodiment;

[0042] Figure 9 A schematic diagram of the installation of the outer ring structure of the steel lattice beam starting section provided in the embodiment;

[0043] Figure 10 A schematic diagram of the installation of the outer ring structure of the steel lattice beam subsequent section and the intermediate structure of the steel lattice beam provided in the embodiment;

[0044] Figure 11 A top view of the installation of the outer ring structure of the steel lattice beam subsequent section and the intermediate structure of the steel lattice beam provided in the embodiment;

[0045] Figure 12 A schematic diagram of the installation of the arch rib support structure and the steel box arch rib structure provided in the embodiment;

[0046] Figure 13 A top view of the installation of the arch rib support structure and the steel box arch rib structure provided in the embodiment;

[0047] Figure 14 A schematic diagram of the installation of the steel box arch rib folding section member provided in the embodiment;

[0048] Fig. The figure shows: shore crane 1, sliding transport system starting platform 2, track beam 201, upper bridge crane starting platform 3, floating crane 4, underwater support 5, sliding transport system 6, sliding transport device 601, transport distribution beam device 602, rigid rod 603, jack 604, upper bridge crane 7, distribution beam 8, socket-type interface 801, fastener 802, steel lattice beam outer ring structure 9, steel lattice beam middle structure 10, arch rib support structure 11, steel box arch rib structure 12, outer ring structure member 901, middle structure member 101, arch rib support member 111, steel box arch rib member 121, steel box arch rib folding section member 122. DETAILED DESCRIPTION

[0049] The present application will be further described and illustrated in the following with reference to the accompanying drawings and specific embodiments. The technical features of each embodiment of the present application can be combined accordingly without conflict.

[0050] As a preferred embodiment in the specific embodiments, the present embodiment provides a system for installing a through-water steel box arch rib tied-arch bridge, comprising a shore crane 1, a sliding transport system starting platform 2, an upper bridge crane starting platform 3, a floating crane 4, an underwater support 5, a sliding transport system 6, an upper bridge crane 7, and a distribution beam 8.

[0051] As shown in Figure 1 , the shore crane 1 is arranged on the land at one end of the steel box arch rib tied-arch bridge to be erected, for erecting the sliding transport system starting platform 2 and the upper bridge crane starting platform 3. The sliding transport system 6 and the upper bridge crane 7 are respectively arranged on the sliding transport system starting platform 2 and the upper bridge crane starting platform 3. The shore crane 1 is also used to hoist the components to be installed onto the sliding transport system 6 parked on the sliding transport system starting platform 2.

[0052] It should be noted that the starting platform top elevation of the sliding transport system starting platform 2 and the upper bridge crane starting platform 3 is the same as the top elevation of the steel lattice beam, and the starting platform erection width does not exceed the width of the steel lattice beam. The sliding transport system starting platform 2 and the upper bridge crane starting platform 3 are erected in parallel along the bridge transverse direction.

[0053] The sliding transport system starting platform 2 comprises two track beams 201 and a platform support. The track beam 201 is provided with a track, and the sliding transport system 6 is arranged on the track, forming a sliding pair therebetween, so that the sliding transport system 6 moves back and forth on the track for transporting the middle structure member 101 and the arch rib support member 111. The track beam 201 can be lengthened in sections along the erection direction of the steel box arch rib tied-arch bridge according to the construction progress.

[0054] As shown in Figure 5 and Figure 6As shown, the sliding transport system 6 provided in this embodiment includes four sliding transport devices 601, with two sliding transport devices 601 installed on each track beam 201. The two sliding transport devices 601 on the same track beam 201 are connected by a rigid rod 603. A transport distribution beam device 602 for transporting the distribution beam 8 is installed between the two parallel sliding transport devices 601. A three-dimensional adjusting jack is also installed on the top of each sliding transport device 601 for adjusting the position of the components.

[0055] The overhead crane 7 is used to install the intermediate steel lattice beam structure 10 and the arch rib support structure 11 of the under-deck steel box girder tied arch bridge to be erected. The overhead crane 7 moves longitudinally along the bridge by alternately lifting two distribution beams 8 set below. Figure 2 and Figure 3 As shown, in this embodiment, both distribution beams 8 are provided with socket-type interfaces 801 at their connection points, so that the two distribution beams 8 form a socket connection. Figure 4 As shown, to prevent displacement and uneven loading during the movement or hoisting of the overhead crane 7, fasteners 802 are installed at the connection between the two distribution beams 8 for secure connection. In this embodiment, pins are used as fasteners.

[0056] like Figure 2 As shown, in this embodiment, each distribution beam 8 is composed of three I-beams, with a steel plate welded to the top of each I-beam. Other types of steel can also be used. Initially, the distribution beam 8 is placed on the starting platform 3 of the overhead crane. As the overhead crane 7 moves longitudinally along the bridge, the distribution beam 8 is placed on the end crossbeams of the outer ring structure 9 of the already installed steel lattice beam and the middle crossbeams of the middle structure 10 of the steel lattice beam, ensuring support from three crossbeams.

[0057] like Figure 7 As shown, the floating crane 4 is positioned in the waterway spanned by the under-deck steel box girder tied arch bridge to be erected, and is used to install the underwater support 5 for supporting the outer ring structure 9 of the steel lattice beam. The floating crane 4 is also used to install the outer ring structure 9 of the steel lattice beam and the steel box girder rib structure 12 of the under-deck steel box girder tied arch bridge to be erected.

[0058] In this embodiment, the floating crane 4 can be a large-tonnage floating crane, and the bridge crane 7 can be a small-tonnage crane. The specific model is determined according to the scale of the steel box arch rib tied arch bridge to be erected.

[0059] This embodiment also provides a construction method for installing a cross-water under-deck steel box girder tied arch bridge system, the specific steps of which are as follows:

[0060] S1: Complete the construction of the bank pier foundations at both ends of the steel box arch ribbed tied arch bridge to be erected, specifically as follows: Figure 7 As shown.

[0061] S2: erecting the sliding transportation system starting platform 2, the upper bridge crane starting platform 3 and the underwater support 5, as shown in Figure 8

[0062] The shore crane 1 is used to erect the sliding transportation system starting platform 2 and the upper bridge crane starting platform 3 at one end of the shore pier column foundation. At the same time, the floating crane 4 is used to erect the underwater support 5 in the water, and the components of the underwater support 5 are transported to the floating crane 4 within the range of the floating crane 4.

[0063] S3: erecting the sliding transportation system 6 and the upper bridge crane 7, and installing the starting section of the steel lattice beam outer ring structure 9, as shown in Figure 9

[0064] The shore crane 1 is used to hoist the sliding transportation system 6 onto the sliding transportation system starting platform 2. The track beams 201 in the sliding transportation system starting platform 2 are arranged on the track, and the sliding transportation system 6 is arranged on the track, forming a sliding pair therebetween, so that the sliding transportation system 6 moves back and forth on the track.

[0065] The shore crane 1 is used to arrange the upper bridge crane 7 on the two distribution beams 8 of the upper bridge crane starting platform 3. The two distribution beams 8 are arranged longitudinally along the bridge, and the two distribution beams 8 are connected by detachable socket connections.

[0066] The floating crane 4 is used to install the starting section of the steel lattice beam outer ring structure 9 from one end close to the upper bridge crane starting platform 3 along the longitudinal direction of the bridge. The steel lattice beam outer ring structure 9 is composed of a plurality of outer ring structure components 901.

[0067] The distribution beams 8 are placed on the end cross beams of the steel lattice beam outer ring structure 9 and the middle cross beams of the steel lattice beam intermediate structure 10, which are installed, to ensure that there are three cross beams for support.

[0068] S4: installing the subsequent section of the steel lattice beam outer ring structure 9 and the steel lattice beam intermediate structure 10, as shown in Figure 10 and Figure 11

[0069] The floating crane 4 is used to install the subsequent section of the steel lattice beam outer ring structure 9, and the upper bridge crane 7 is used to install the steel lattice beam intermediate structure 10 along the longitudinal direction of the bridge. The installation progress of the steel lattice beam intermediate structure 10 lags behind the steel lattice beam outer ring structure 9 by more than one section. The steel lattice beam intermediate structure 10 is composed of a plurality of intermediate structure components 101.

[0070] The steel lattice beam intermediate structure 10 is installed by the following method:

[0071] S41: on the upper bridge crane starting platform 3, the upper bridge crane 7 is used to install the first intermediate structure component 101 between the first outer ring structure component 901. ​​​

[0072] S42: After the installation is completed, the overhead crane 7 walks forward to the middle of the first section of the intermediate structure member 101. The overhead crane 7 walks forward by itself to alternately hoist and deliver 2 pieces of the distribution beam 8 to realize the forward movement. On the installed steel lattice beam intermediate structure 10, the track beam 201 and the track in the starting platform 2 of the sliding transport system are laid forward. The second section of the intermediate structure member 101 is hoisted by the shore crane 1 to the sliding transport system 6 on the sliding transport system starting platform 2, and transported to the hoisting range of the overhead crane 7 through the track. The second section of the intermediate structure member 101 is installed between the second section of the outer ring structure member 901 by the overhead crane 7.

[0073] S43: Repeat the above step S42, and install the intermediate structure member 101 in sections forward until the steel lattice beam intermediate structure 10 is completely installed.

[0074] S5: Install the arch rib support structure 11 and the steel box arch rib structure 12, as shown in Figure 12 and Figure 13 .

[0075] Before the steel box arch rib structure 12 is installed, the arch rib support structure 11 is erected according to the installation sequence of the steel box arch rib structure 12. The arch rib support structure 11 is installed by the overhead crane 7, and the arch rib support structure 11 is composed of a plurality of arch rib support members 111. The arch rib support member 111 is transported to the hoisting position of the overhead crane 7 by the sliding transport system 6, and the transportation and installation process of the arch rib support member 111 is consistent with that of the intermediate structure member 101 in step S42, until the arch rib support structure 11 is completely installed.

[0076] The steel box arch rib structure 12 is installed by the floating crane 4, and the steel box arch rib structure 12 includes steel box arch rib members 121 at both ends of the bridge and steel box arch rib closure segment members 122 in the middle. According to the installation progress of the arch rib support member 111, the steel box arch rib member 121 is installed in sections on the arch rib support member 111. The installation of the steel box arch rib structure 12 is first installed from the end away from the starting platform 3 of the overhead crane to the center of the bridge span, and then installed from the end close to the starting platform 3 of the overhead crane to the center of the bridge span, and finally the steel box arch rib closure segment member 122 is installed between the two steel box arch rib members 121 in the middle, as shown in Figure 14 .

[0077] S6: Remove the arch rib support structure 11 and install the deck slab:

[0078] The arch rib support structure 11 is dismantled from one end of the longitudinal bridge away from the starting platform 3 of the upper bridge crane. The upper bridge crane 7 is used to sequentially push forward the dismantling of the arch rib support member 111 in the opposite direction to the installation direction until the upper bridge crane 7 moves to the starting platform 3 of the upper bridge crane. In the process of dismantling, the bridge deck and the boom are sequentially installed, and the track beam 201 and the track are dismantled in sections until the sliding transport system 6 moves to the starting platform 2 of the sliding transport system. The installation of the through-water lower-arch steel box arch rib tied-arch bridge is completed.

[0079] The above-described embodiments are only a preferred scheme of the present application, and are not intended to limit the present application. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application. Therefore, any technical scheme obtained by equivalent replacement or equivalent transformation falls within the protection scope of the present application.

Claims

1. A system for installing a through-water decked steel box arch rib tied-arch bridge, characterized in that, The system comprises a shore crane (1), a sliding transport system starting platform (2), an over-bridge crane starting platform (3), a floating crane (4), a water support (5), a sliding transport system (6), an over-bridge crane (7) and a distribution beam (8); The shore crane (1) is arranged on the land at one end of the shore of the steel box arch rib tied-arch bridge to be erected, and is used for erecting the sliding transport system starting platform (2) and the over-bridge crane starting platform (3); the sliding transport system starting platform (2) and the over-bridge crane starting platform (3) are arranged respectively to erect the sliding transport system (6) and the over-bridge crane (7); The over-bridge crane (7) is used for installing the steel lattice beam middle structure (10) and the arch rib support structure (11) of the steel box arch rib tied-arch bridge to be erected by hoisting alternately two distribution beams (8) arranged below to realize self-walking along the longitudinal bridge direction. The sliding transport system starting platform (2) comprises two track beams (201) and a platform support; the track beam (201) is provided with a track, and the sliding transport system (6) is arranged on the track to form a sliding pair therebetween, so that the sliding transport system (6) moves back and forth on the track to transport the middle structure member (101) and the arch rib support member (111). The floating crane (4) is arranged in the water area crossed by the steel box arch rib tied-arch bridge to be erected, and is used for installing the water support (5), the steel lattice beam outer ring structure (9) and the steel box arch rib structure (12) of the steel box arch rib tied-arch bridge to be erected; the water support (5) is used for supporting the steel lattice beam outer ring structure (9).

2. The system for installing a through water decked steel box arch tied-arch bridge of claim 1, wherein, The starting platform top elevation of the sliding transport system starting platform (2) and the over-bridge crane starting platform (3) is the same as the top elevation of the steel lattice beam, and the erection width of the starting platform does not exceed the width of the steel lattice beam.

3. The system for installing a through water decked steel box arch tied-arch bridge of claim 1, wherein, The sliding transport system (6) comprises four sliding transport devices (601), and two sliding transport devices (601) are arranged on each track beam (201); the two sliding transport devices (601) on the same track beam (201) are connected through a rigid rod (603); and a transport distribution beam device (602) for transporting the distribution beam (8) is arranged between the two parallel sliding transport devices (601).

4. The system for installing a through water decked steel box arch tied-arch bridge of claim 3, wherein, A jack (604) is arranged on the top of each sliding transport device (601); the jack (604) is a three-dimensional adjusting jack, and is used for adjusting the position of the member.

5. The system for installing a through water decked steel box arch tied-arch bridge of claim 1, wherein, A socket joint (801) is arranged at the connection of the two distribution beams (8) to form a socket connection; a fastener (802) is further arranged at the connection of the two distribution beams (8) to form a fixed connection, so as to avoid displacement and unbalanced load during the walking or hoisting of the over-bridge crane (7).

6. The system for installing a through water decked steel box arch tied-arch bridge of claim 5, wherein, The fastener (802) is a pin.

7. The system for installing a through water decked steel box arch tied-arch bridge of claim 1, wherein, The distribution beam (8) is a three-spliced I-beam.

8. The system for installing a through water decked steel box arch tied-arch bridge of claim 1, wherein, The floating crane (4) is a large-tonnage floating crane, and the over-bridge crane (7) is a small-tonnage crane.

9. The system for installing a through water decked steel box arch tied-arch bridge of claim 1, wherein, The distribution beam (8) is placed on the end cross beam of the steel lattice beam outer ring structure (9) or the middle cross beam of the steel lattice beam middle structure (10) of the over-bridge crane starting platform (3) or the steel lattice beam outer ring structure (9) which has been installed, so as to be supported by three cross beams.

10. A method of construction using the system for erecting a tied-arch bridge with steel box arch ribs supported on the ground below across a water area according to claim 1, characterized by, The specific steps are as follows: S1: after the completion of the shore pier column foundation construction at both ends of the steel box arch rib tied-arch bridge to be erected, a shore crane (1) is used to erect a sliding transportation system starting platform (2) and an over-bridge crane starting platform (3) at the shore pier column foundation at one end; S2: the shore crane (1) is used to hoist the sliding transportation system (6) onto the sliding transportation system starting platform (2); a track is laid on the track beam (201) in the sliding transportation system starting platform (2), the sliding transportation system (6) is arranged on the track, and a sliding pair is formed between the two, so that the sliding transportation system (6) moves back and forth on the track; the shore crane (1) is used to arrange the over-bridge crane (7) on the two distribution beams (8) of the over-bridge crane starting platform (3); the two distribution beams (8) are arranged longitudinally along the bridge in front and back, and the two distribution beams (8) are connected by detachable sockets; a floating crane (4) is used to install the starting section of the steel lattice beam outer ring structure (9) from the end close to the over-bridge crane starting platform (3) along the longitudinal direction of the bridge; the steel lattice beam outer ring structure (9) is composed of a plurality of outer ring structure members (901); S3: the floating crane (4) is used to install the subsequent section of the steel lattice beam outer ring structure (9), and the over-bridge crane (7) is used to install the steel lattice beam intermediate structure (10) along the longitudinal direction of the bridge; the installation progress of the steel lattice beam intermediate structure (10) lags behind that of the steel lattice beam outer ring structure (9) by more than one section; the steel lattice beam intermediate structure (10) is composed of a plurality of intermediate structure members (101); S31: on the over-bridge crane starting platform (3), the over-bridge crane (7) is used to install the first intermediate structure member (101) between the first outer ring structure member (901); the track beam (201) and the track in the sliding transportation system starting platform (2) are laid on the installed first intermediate structure member (101); the shore crane (1) is used to hoist the second intermediate structure member (101) onto the sliding transportation system (6) on the sliding transportation system starting platform (2), the second intermediate structure member (101) is transported to the hoisting range of the over-bridge crane (7) through the track, and the over-bridge crane (7) is used to install the second intermediate structure member (101) between the second outer ring structure member (901); The step S31 is repeated, and the intermediate structure members (101) are installed in sections and advanced forward, until the steel lattice beam intermediate structure (10) is completely installed; S4: the over-bridge crane (7) is used to install the arch rib support structure (11); the arch rib support structure (11) is composed of a plurality of arch rib support members (111); the transportation and installation process of the arch rib support member (111) is consistent with that of the intermediate structure member (101) in step S31, until the arch rib support structure (11) is completely installed; S5: install the steel box arch rib structure (12) by using the floating crane (4), the steel box arch rib structure (12) comprises steel box arch rib members (121) at both ends of the bridge and steel box arch rib closure segment members (122) in the middle; according to the installation progress of the arch rib support members (111) in step S4, install the steel box arch rib members (121) on the arch rib support members (111) in sections; the installation of the steel box arch rib structure (12) is first from one end away from the bridge crane starting platform (3) to the center of the bridge span, then from one end close to the bridge crane starting platform (3) to the center of the bridge span, and finally install the steel box arch rib closure segment members (122) between the two steel box arch rib members (121) in the middle; S6: remove the arch rib support structure (11) from one end away from the bridge crane starting platform (3) along the longitudinal bridge; use the bridge crane (7) to sequentially push forward to remove the arch rib support members (111) in the direction opposite to the installation direction until the bridge crane (7) moves to the bridge crane starting platform (3); install the deck slab and the suspender in sequence during the removal process, and remove the track beam (201) and the track in sections until the sliding transport system (6) moves to the sliding transport system starting platform (2); complete the installation of the through-water lower-bearing steel box arch rib tied-arch bridge.

Images