Construction measure system for main beam installation or main cable replacement of self-anchored suspension bridge, using method and construction method

Abstract

The invention discloses a construction measure system for main beam installation or main cable replacement of a self-anchored suspension bridge, a use method and a construction method. The construction measure system comprises a temporary support, a temporary buckle cable, a tower end anchoring structure and a beam end anchoring structure. The tower end anchoring structure is arranged in the main tower; the beam end anchoring structure is arranged in the main beam structure, the temporary supports are symmetrically arranged on the two banks of the bridge, the four sets of temporary buckle cables are arranged on the vertical faces, in the bridge direction, of tower columns of four main towers of the self-anchored suspension bridge respectively, one ends of the temporary buckle cables are connected with the main towers through the tower end anchoring structure, and the other ends of the temporary buckle cables are connected with the main towers. And the other end of the temporary buckle cable is connected with the main beam through a beam end anchoring structure. The problems that a midspan main beam of the self-anchored suspension bridge crossing the channel cannot be constructed under the condition that normal passage of the channel is guaranteed, and a main cable of an existing self-anchored suspension bridge is difficult to replace and construct are solved. And the suspension bridge is maintained by repeatedly disassembling and assembling the temporary supports and the temporary buckle cables and restoring the construction measure system.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge engineering, and in particular to a construction measure system, a use method and a construction method for installing a main beam or replacing a main cable of a self-anchored suspension bridge. Background Art

[0002] The construction of self-anchored suspension bridges generally adopts the method of first beam and then cable, that is, first set up the bracket to complete the installation of the main beam, then construct the cable hanging system, and finally complete the system conversion by tensioning the hanger. However, for self-anchored suspension bridges across the waterway, if it is necessary to ensure the normal passage of water transport vessels in the waterway, it is impossible to directly set up dense brackets in the cross-domain waterway to install the main beam. In addition, for existing self-anchored suspension bridges, since the two main cables of the bridge bear all the bridge loads, once the main cables reach their designed service life or are damaged, it is difficult to replace the main cables. Summary of the invention

[0003] The purpose of the present invention is to provide a construction measure system, use method and construction method for installing the main beam or replacing the main cable of a self-anchored suspension bridge, so as to solve the problem that the mid-span main beam of a self-anchored suspension bridge across a waterway cannot be constructed while ensuring normal traffic on the waterway, and to solve the problem that it is difficult to replace the main cable of an existing self-anchored suspension bridge.

[0004] In order to solve the above technical problems, the present invention provides a construction measure system for installing the main beam of a self-anchored suspension bridge or replacing the main cable, including a temporary bracket, a temporary buckle cable, a tower end anchoring structure and a beam end anchoring structure;

[0005] The temporary supports are arranged symmetrically on both sides of the bridge, and are divided into two parts: the middle span side and the side span side. The temporary supports on the middle span side are arranged close to the outside of the river navigation hole, and the temporary supports on the side span side are arranged in multiple groups, respectively located near the main tower, the middle of the side span area, and the anchorage section of the main cable of the side span;

[0006] There are 4 groups of temporary cables, which are respectively arranged at the vertical surfaces of the tower columns of the 4 main towers of the self-anchored suspension bridge along the bridge. Each group of temporary cables consists of several pairs of cables, which are divided into two parts: the middle span side and the side span side. One end of the temporary cable is connected to the main tower through the tower end anchoring structure, and the other end of the temporary cable is connected to the main beam through the beam end anchoring structure.

[0007] The tower end anchoring structure is composed of four groups, which are arranged in the tower columns of the four main towers of the self-anchored suspension bridge respectively, and are divided into two parts: the middle span side and the side span side. The tower end anchoring structure is composed of a tower end conduit and a tower end anchor plate. One end of the temporary cable passes through the tower end conduit of the tower end anchoring structure, and tensioning and anchoring are completed at the rear end of the tower end anchor plate.

[0008] The beam end anchoring structure is arranged in the main beam structure and is divided into two parts, the middle span side and the side span side. The beam end anchoring structure consists of a beam end guide tube and a beam end anchor plate. One end of the temporary cable passes through the beam end guide tube of the beam end anchoring structure, and tensioning and anchoring are completed at the rear end of the beam end anchor plate.

[0009] Furthermore, in the construction measure system for installing the main beam or replacing the main cable of a self-anchored suspension bridge provided by the present invention, the load of the main beam section in the middle span area is jointly borne by the temporary support and temporary cables on the middle span side, the temporary support on the middle span side is arranged near the outside of the river navigation hole, and bears the load of the main beam section from the main tower to the non-navigation hole, and the temporary cables are arranged within the range of the main beam section above the navigation hole, and bears the load of the main beam section within the range of the navigation hole.

[0010] Furthermore, the present invention provides a construction measure system for installing the main beam or replacing the main cable of a self-anchored suspension bridge, wherein each temporary cable corresponds to a tower end anchor structure and a beam end anchor structure, and one end of the temporary cable is connected and anchored to the tower end anchor structure, and the other end is connected and anchored to the beam end anchor structure, forming a force transmission system to transfer the main beam load to the main tower.

[0011] Furthermore, the present invention provides a construction measure system for installing the main beam or replacing the main cable of a self-anchored suspension bridge, wherein the tower end anchoring structure is a hidden structure, arranged on one side inside the main tower, avoiding the cross-section of the main cable and the hanger of the suspension bridge; after the bridge construction is completed, a cover plate is used to close the tower end duct, and the tower end anchoring structure is retained inside the main tower. When the measure system needs to be restored at a later time, the cover plate of the tower end duct port is opened to restore the use function of the tower end anchoring structure.

[0012] Furthermore, the present invention provides a construction measure system for the installation of the main beam or replacement of the main cable of a self-anchored suspension bridge, wherein the beam end anchoring structure is a semi-hidden structure, arranged inside the main beam box chamber, and part of the beam end conduit passes through the main beam bridge deck and extends out of the bridge deck; after the bridge construction is completed, the part of the beam end conduit extending out of the bridge deck is cut off and closed with a cover plate, and the beam end anchoring structure is retained inside the main beam. When the measure system needs to be restored later, the cover plate of the beam end conduit port is opened, and the beam end conduit is extended to restore the use function of the beam end anchoring structure.

[0013] Furthermore, in the construction measure system provided by the present invention for installing the main beam or replacing the main cable of a self-anchored suspension bridge, the number of temporary cables arranged on the mid-span side is the same as the number of main beam sections within the navigation channel.

[0014] Furthermore, the method for using the construction measure system for installing the main beam of a self-anchored suspension bridge or replacing the main cable provided by the present invention is used for installing the main beam of a self-anchored suspension bridge during the main beam installation construction phase of the self-anchored suspension bridge, and comprises:

[0015] Step S101: constructing main towers across the waterway, and symmetrically installing a plurality of longitudinally spaced tower end anchoring structures on each main tower along the bridge direction;

[0016] Step S102: constructing a temporary support;

[0017] Step S103: placing the side span main beam with the beam end anchoring structure installed on the temporary support and the main tower;

[0018] Step S104: connecting the middle span main beam with the beam end anchoring structure installed between it and the main tower through temporary buckles and setting it on the temporary bracket on the middle span side until the middle span middle beam and the side span main beam are closed;

[0019] Step S105: Install main cables on the side span main beam and the main tower, install vertically distributed hangers between the main cables and the main beam, tension the hangers, and convert the temporary force system of the main beam by temporary cables and temporary brackets into a permanent force system of the main beam by main cables and hangers, thus completing the conversion of the main beam force system;

[0020] Step 106: Remove the temporary cables and temporary brackets, close the tower end anchor structure and the beam end anchor structure with cover plates, and complete the main beam installation of the self-anchored suspension bridge.

[0021] Furthermore, the method for using the construction measure system for installing the main beam of a self-anchored suspension bridge or replacing the main cable provided by the present invention is used for the main cable replacement construction of the self-anchored suspension bridge during the main cable replacement construction phase of the self-anchored suspension bridge, comprising:

[0022] Step S201, opening the tower end anchoring structure and the beam end anchoring structure of the self-anchored suspension bridge by opening the cover plate, restoring the use function of the tower end anchoring structure and the beam end anchoring structure, constructing temporary supports, and setting jacks on the top of each temporary support;

[0023] Step S202: Install temporary cables and tension them; lift the jack on the temporary support to apply prestress to the main beam, convert the permanent force system of the main beam by the main cable and the hanger rod to the temporary force system of the main beam by the temporary cables and the temporary support, and complete the conversion of the main beam force system;

[0024] Step S203: dismantle the suspension rod and the main cable and replace the main cable;

[0025] Step S204: Install and tension the suspender rod, convert the temporary force-bearing system of the main beam by the temporary cable and the temporary bracket into the permanent force-bearing system of the main beam by the main cable and the suspender rod, and complete the conversion of the main beam force-bearing system;

[0026] Step S205: Unload and remove the jack, remove the temporary support and temporary cable, close the tower end anchor structure and the beam end anchor structure with a cover plate, and complete the main cable replacement construction of the self-anchored suspension bridge.

[0027] Compared with the prior art, the construction measure system and the use method thereof provided by the present invention for installing the main beam of a self-anchored suspension bridge or replacing the main cable have the following beneficial effects:

[0028] Through a construction measure system for main girder installation or main cable replacement of a self-anchored suspension bridge constructed by temporary supports, temporary cables, tower end anchoring structures and beam end anchoring structures, the temporary cables are connected to the main tower and main girder of the self-anchored suspension bridge respectively through the tower end and beam end anchoring structures, the temporary supports are arranged under the main girder, and the temporary cables and supports are combined to bear the structural load of the self-anchored suspension bridge, so that the main girder installation of the self-anchored suspension bridge and the subsequent main cable replacement construction can be carried out by the beam-first-cable-later method. During the main beam installation construction phase of the bridge, the construction measure system is used as a temporary force for the main beam during the construction process to achieve the installation and erection of the main beam. After the overall construction of the self-anchored suspension bridge is completed, the temporary cables and temporary brackets in the construction measure system are removed, and the tower beam end anchoring structure is closed to complete the overall construction of the self-anchored suspension bridge. In the later maintenance and structural replacement phase of the bridge, the measure system is restored by opening the tower beam end anchoring structure, reinstalling temporary brackets and temporary cables, and transferring the load of the main cable, thereby achieving the replacement construction of the main cable of the self-anchored suspension bridge without affecting the normal operation and use function of the bridge.

[0029] In order to solve the problem that the mid-span main beam of a self-anchored suspension bridge across a waterway cannot be constructed while ensuring normal passage of the waterway, the present invention further provides a construction method for installing the main beam of a self-anchored suspension bridge, which adopts the above-mentioned construction measure system for installing the main beam of a self-anchored suspension bridge or replacing the main cable, including:

[0030] Step S301: construct bridge piers and main towers across the waterway, and install multiple tower end anchor structures symmetrically spaced longitudinally on each main tower along the bridge direction;

[0031] Step S302: construct temporary supports on both sides of each main tower along the bridge direction;

[0032] Step S303: placing the side span main beam with the beam end anchoring structure installed on the temporary support, piers and main tower;

[0033] Step S304: connecting the middle span main beam with the beam end anchoring structure installed between it and the main tower through temporary buckles and setting it on the temporary bracket on the middle span side until the middle span main beam and the side span main beam are closed;

[0034] Step S305: Install main cables on the side span main beam and the main tower, install vertically distributed hangers between the main cables and the main beam, tension the hangers between the main beam and the main cables, and convert the temporary force system of the main beam by temporary cables and temporary brackets into a permanent force system of the main beam by main cables and hangers, thus completing the conversion of the main beam force system;

[0035] Step 306: Remove the temporary cables and temporary brackets, and close the tower end anchor structure and the beam end anchor structure with cover plates.

[0036] Compared with the prior art, the construction method for installing the main beam of a self-anchored suspension bridge provided by the present invention has the following beneficial effects:

[0037] Before the temporary cable fastening, the side span main beam is temporarily supported by temporary brackets; after the temporary cable fastening, the side span main beam is also temporarily tensioned by the tension of the main tower and main beam by the temporary cable fastening, thus ensuring the stability and safety of the side span main beam. After the temporary cable fastening, the middle span main beam is temporarily tensioned by the tension of the temporary cable fastening, and is temporarily supported by temporary brackets on the middle span side, thus ensuring the stability and reliability of the middle span main beam during installation, solving the problem that the middle span main beam of the self-anchored suspension bridge across the waterway cannot be constructed while ensuring the normal passage of the waterway, and is not restricted by the site and surrounding environment, which is conducive to ensuring construction safety and controlling construction quality.

[0038] In order to solve the problem that it is difficult to replace the main cable of the existing self-anchored suspension bridge, the present invention also provides a construction method for replacing the main cable of the self-anchored suspension bridge formed by the above-mentioned construction method of the self-anchored suspension bridge, comprising:

[0039] Step S401, opening the tower end anchoring structure and the beam end anchoring structure of the self-anchored suspension bridge by opening the cover plate to restore the use function of the tower end anchoring structure and the beam end anchoring structure, constructing temporary supports on both sides of each main tower along the bridge direction, and setting a jack on the top of each temporary support;

[0040] Step S402: installing a plurality of temporary cables symmetrically distributed on both sides of each main tower along the bridge through the tower end anchoring structure of the main tower and the beam end anchoring structure of the main beam, and tensioning the temporary cables; lifting the jack on the temporary support to apply prestress to the main beam, converting the permanent force system of the main beam by the main cable and the suspender rod to the temporary force system of the main beam by the temporary cables and the temporary support, and completing the conversion of the main beam force system;

[0041] Step S403: dismantle the suspension rod and the main cable and replace the main cable;

[0042] Step S404: installing a hanger between the replaced main cable and the main beam, tensioning the hanger, converting the temporary force-bearing system of the main beam by the temporary cable and the temporary bracket to the permanent force-bearing system of the main cable and the hanger, and completing the conversion of the main beam force system;

[0043] Step S405: Unload and remove the jack, remove the temporary support and temporary cable, close the tower end anchor structure and the beam end anchor structure with a cover plate, and complete the main cable replacement construction of the self-anchored suspension bridge.

[0044] Compared with the prior art, the construction method for replacing the main cable of a self-anchored suspension bridge provided by the present invention has the following beneficial effects:

[0045] By converting the bridge load of the existing self-anchored suspension bridge with the above structure from the permanent force-bearing system of the main cable and the hanger to the temporary force-bearing system of the main beam by the temporary cable and the temporary bracket, the first conversion of the main beam force system is completed, the load transfer of the self-anchored suspension bridge is realized, thereby unloading the load of the old main cable, and realizing the replacement of the main cable of the self-anchored suspension bridge. After the main cable is replaced, by converting the temporary force-bearing system of the main beam by the temporary cable and the temporary bracket to the permanent force-bearing system of the main beam by the main cable and the hanger, the second conversion of the main beam force system is completed, so that during the main cable replacement construction process, the normal use of the self-anchored suspension bridge is not affected, and the problem that the main cable of the existing self-anchored suspension bridge with the above structure cannot be replaced or is difficult to replace due to other factors such as expiration of service life or damage, which makes it unsafe. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a structural schematic diagram of a construction measure system for installing the main beam or replacing the main cable of a self-anchored suspension bridge;

[0047] Figure 2 It is a structural schematic diagram of the tower end anchoring structure;

[0048] Figure 3 It is a structural diagram of the beam end anchorage structure;

[0049] Figure 4a It is a structural schematic diagram of the elevation process of constructing the main tower and the tower end anchorage structure thereon during the main beam installation stage of the self-anchored suspension bridge;

[0050] Figure 4b It is a structural diagram of the elevation process of constructing a temporary support during the main beam installation stage of a self-anchored suspension bridge;

[0051] Figure 4c It is a structural diagram of the elevation process of constructing the side span main beam during the main beam installation stage of the self-anchored suspension bridge;

[0052] Figure 4d It is a structural diagram of the elevation process of the main beam of the self-anchored suspension bridge during the main beam installation stage of the construction;

[0053] Figure 4e It is a structural diagram of the elevation process of constructing the main cables and hangers during the main girder installation stage of a self-anchored suspension bridge;

[0054] Figure 4f It is a structural schematic diagram of the elevation process of removing temporary brackets and temporary cables during the main girder installation stage of a self-anchored suspension bridge;

[0055] Figure 5a It is a structural diagram of the elevation process of constructing a temporary support during the main cable replacement construction phase of a self-anchored suspension bridge;

[0056] Figure 5b It is a structural diagram of the elevation process of constructing temporary cable buckling during the main cable replacement construction phase of a self-anchored suspension bridge;

[0057] Figure 5c It is a structural schematic diagram of the elevation process of removing the hanger on the self-anchored suspension bridge during the main cable replacement construction phase of the self-anchored suspension bridge;

[0058] Figure 5d It is a structural schematic diagram of the elevation process of replacing the main cable construction and restoring the installation of the suspender rod during the main cable replacement construction phase of the self-anchored suspension bridge;

[0059] Figure 5e It is a structural schematic diagram of the facade process of removing temporary cables and temporary supports;

[0060] As shown in the figure:

[0061] 1. Temporary support; 2. Temporary cable; 3. Tower end anchoring structure; 3-1. Tower end guide tube; 3-2. Tower end anchor plate; 4. Beam end anchoring structure; 4-1. Beam end guide tube; 4-2. Beam end anchor plate; 5. Main tower; 6. Main beam; 7. Main cable; 8. Hanger; 9. Pier. DETAILED DESCRIPTION

[0062] The present invention is described in detail below in conjunction with the accompanying drawings: The advantages and features of the present invention will become more apparent from the following description. It should be noted that the accompanying drawings are in very simplified form and in non-precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0063] Embodiment 1

[0064] Please refer to Figures 1 to 3 An embodiment of the present invention provides a construction measure system for installing a main beam or replacing a main cable of a self-anchored suspension bridge, including a temporary support 1, a temporary cable 2, a tower end anchoring structure 3 and a beam end anchoring structure 4.

[0065] The temporary support 1 is symmetrically arranged on both sides of the bridge, and is divided into two parts: the middle span side and the side span side. The temporary support 1 on the middle span side is arranged close to the outside of the river navigation hole, and the temporary support 1 on the side span side is divided into three groups, which are respectively located near the main tower 5, the middle of the side span area, and the anchor section of the side span main cable 7.

[0066] There are 4 groups of temporary cables 2, which are arranged at the vertical surfaces of the towers of the 4 main towers 5 of the self-anchored suspension bridge. Each group of temporary cables 2 consists of several pairs of cables, and each pair of cables is divided into 2 paths, which are arranged at the upstream and downstream sides of the main beam, and are divided into two parts: the middle span side and the side span side. One end of the temporary cables 2 is connected to the main tower 5 through the tower end anchoring structure 3, and the other end of the temporary cables 2 is connected to the main beam 6 through the beam end anchoring structure 4. The number of temporary cables 2 arranged on the middle span side is the same as the number of main beam 6 sections within the navigation channel, so as to ensure the constructability and safety of the main beam 6 within the navigation channel, i.e., the middle span side, during the installation process. The number of temporary cables 2 on the side span side corresponds to the number of temporary cables 2 on the middle span side. Each temporary cable 2 corresponds to a tower end anchor structure 3 and a beam end anchor structure 4. One end of the temporary cable 2 is connected and anchored to the tower end anchor structure 3, and the other end is connected and anchored to the beam end anchor structure 4, forming a force transmission system to transfer the load of the main beam 6 to the main tower 5.

[0067] The tower end anchoring structure 3 is composed of 4 groups, which are arranged in the tower columns of the 4 main towers 5 of the self-anchored suspension bridge, and are divided into two parts: the middle span side and the side span side. The tower end anchoring structure 3 is composed of a tower end conduit 3-1 and a tower end anchor plate 3-2. One end of the temporary buckle 2 passes through the tower end conduit 3-1 of the tower end anchoring structure 3, and is tensioned and anchored at the rear end of the tower end anchor plate 3-2. Please refer to Figure 2 The tower end anchoring structure 3 is a hidden structure, arranged on one side inside the main tower 5, avoiding the cross-section of the main cable 7 and the hanger 8 of the suspension bridge; after the bridge construction is completed, a cover plate (not shown) is used to close the tower end duct 3-1, and the tower end anchoring structure 3 is retained inside the main tower 5. When it is necessary to restore this measure system later, the cover plate at the port of the tower end duct 3-1 is opened to restore the use function of the tower end anchoring structure 3.

[0068] The beam end anchoring structure 4 is arranged in the main beam 6 structure, and is divided into two parts, the middle span side and the side span side. The beam end anchoring structure 4 is composed of a beam end conduit 4-1 and a beam end anchor plate 4-2. One end of the temporary buckle 2 passes through the beam end conduit 4-1 of the beam end anchoring structure 4, and is tensioned and anchored at the rear end of the beam end anchor plate 4-2. Please refer to Figure 3 The beam end anchoring structure 4 is a semi-hidden structure, arranged inside the box room of the main beam 6, and part of the beam end conduit 4-1 passes through the bridge deck of the main beam 6 and extends out of the bridge deck; after the bridge construction is completed, the part of the beam end conduit 4-1 extending out of the bridge deck is cut off and closed with a cover plate, and the beam end anchoring structure 4 is retained inside the main beam 6. When it is necessary to restore this measure system later, the cover plate of the port of the beam end conduit 4-1 is opened, and the beam end conduit 4-1 is extended to restore the use function of the beam end anchoring structure 4.

[0069] In the construction measure system for installing the main beam or replacing the main cable of a self-anchored suspension bridge provided by an embodiment of the present invention, the load of the main beam section 6 in the middle span area is jointly borne by the temporary support 1 and the temporary cable 2 on the middle span side. The temporary support 1 on the middle span side is arranged near the outer side of the river navigation hole, and bears the load of the main beam section 6 from the main tower 5 to the non-navigation hole. The temporary cable 2 is arranged within the range of the main beam section 6 above the navigation hole, and bears the load of the main beam section 6 within the range of the navigation hole.

[0070] Embodiment 2

[0071] Please refer to Figures 4a to 4f The method for using the construction measure system for installing the main beam of a self-anchored suspension bridge or replacing the main cable provided by the embodiment of the present invention is used for installing the main beam 6 of the self-anchored suspension bridge during the main beam 6 installation construction phase of the self-anchored suspension bridge, including:

[0072] Step S101: construct the main tower 5 across the waterway, and install multiple tower end anchor structures 3 symmetrically spaced longitudinally on each main tower 5 along the bridge direction. The main tower 5 includes a tower column and a bridge pier 9 below it. The waterway refers to a channel specified or set for ship navigation in waters such as rivers, lakes, and seas; it is a part of a waterway or river, usually including a certain width, depth, and clearance height to ensure the safe passage of ships.

[0073] Step S102: construct temporary supports 1. The temporary supports 1 located between the main towers 55 along the bridge, that is, the temporary supports 1 on the mid-span side, are located at the edge area or the shore area of ​​the channel to avoid the temporary supports 1 occupying the center area of ​​the channel and affecting the navigation of ships.

[0074] Step S103: The side span main beam 6 with the beam end anchoring structure 4 is installed on the temporary support 1 and the main tower 5. In order to improve the reliability of the installation of the side span main beam 6 and avoid the collapse of the main beam 6, the temporary support 1 between the main tower 5 and the pier 9 includes but is not limited to 3 groups.

[0075] Step S104: The middle span main beam 6 with the beam end anchoring structure 4 installed is connected between it and the main tower 5 through the temporary buckle 2 and is set on the temporary support 1 on the middle span side until the middle span middle beam and the side span main beam 6 are closed. At this time, multiple nested triangular structures are formed between the temporary buckle 2 and the main beam 6 on both sides of the main tower 5, so that the main beam 6 is suspended and stressed by the temporary buckle 2, and the main beam 6 is supported and stressed by the temporary support 1, so as to ensure the stability and safety of the main beam 6. The main beam 6 can be a steel beam or a precast reinforced concrete beam.

[0076] Step S105: Install the main cable 7 on the side span main beam 6 and the main tower 5, install the vertically distributed hangers 8 between the main cable 7 and the main beam 6, tension the hangers 8, and convert the temporary force-bearing system of the main beam 6 composed of the temporary cable 2 and the temporary support 1 into a permanent force-bearing system of the main cable 7 and the hangers 8, thereby completing the conversion of the force system of the main beam 6.

[0077] Step 106: Remove the temporary cable 2 and temporary support 1, and close the tower end anchor structure 3 and the beam end anchor structure 4 with a cover plate to complete the installation of the main beam 6 of the self-anchored suspension bridge. In this step 106, the bridge deck and its auxiliary structures can be constructed on the main beam 6 to complete the overall construction of the self-anchored suspension bridge.

[0078] Embodiment 3

[0079] Please refer to Figure 5a to Figure 5e The method for using the construction measure system for installing the main beam of a self-anchored suspension bridge or replacing the main cable provided by the embodiment of the present invention is used for replacing the main cable 7 of the self-anchored suspension bridge during the main cable 7 replacement construction phase of the self-anchored suspension bridge, including:

[0080] Step S201, open the tower end anchoring structure 3 and the beam end anchoring structure 4 of the self-anchored suspension bridge by opening the cover plate, restore the use function of the tower end anchoring structure 3 and the beam end anchoring structure 4, construct a temporary support 1, and set a jack (not shown) on the top of each temporary support 1.

[0081] Step S202: Install temporary tie cables 2 and tension temporary tie cables 2; lift the jack on the temporary support 1 to apply prestress to the main beam 6, convert the permanent force-bearing system of the main cable 7 and the hanger 8 on the main beam 6 into a temporary force-bearing system of the temporary tie cables 2 and the temporary support 1 on the main beam 6, and complete the conversion of the force system of the main beam 6.

[0082] Step S203: dismantle the suspension rod 8 and the main cable 7 and replace the main cable 7.

[0083] Step S204: Install and tension the suspension rod 8 to convert the temporary force-bearing system of the main beam 6 composed of the temporary cable 2 and the temporary support 1 into a permanent force-bearing system of the main beam 6 composed of the main cable 7 and the suspension rod 8, thereby completing the conversion of the force-bearing system of the main beam 6.

[0084] Step S205: Unload and remove the jack, remove the temporary support 1 and the temporary cable 2, close the tower end anchor structure 3 and the beam end anchor structure 4 by means of a cover plate, and complete the replacement construction of the main cable 7 of the self-anchored suspension bridge.

[0085] The above-mentioned embodiments 1 to 3 of the present invention provide a construction measure system for the installation of the main beam or replacement of the main cable of a self-anchored suspension bridge and a method of using the same. The construction measure system for the installation of the main beam 6 and the replacement of the main cable 7 of a self-anchored suspension bridge is constructed by a temporary support 1, a temporary cable 2, a tower end anchoring structure 3, and a beam end anchoring structure 4. The temporary cable 2 is connected to the main tower 5 and the main beam 6 of the self-anchored suspension bridge through the tower end and beam end anchoring structures 3 and 4, respectively. The temporary support 2 is arranged below the main beam 6. The temporary cable 2 and the temporary support 1 are combined to bear the structural load of the self-anchored suspension bridge. The main beam 6 of the self-anchored suspension bridge can be installed and the main cable 7 can be replaced in the later stage by the beam-first-cable-later method. During the installation and construction phase of the main beam 6 of the bridge, the construction measure system is used as a temporary force for the main beam 6 during the construction process to achieve the installation and erection of the main beam 6. After the overall construction of the self-anchored suspension bridge is completed, the temporary cable 2 and temporary bracket 1 in the construction measure system are removed, and the tower beam end anchoring structure 4 is closed to complete the overall construction of the self-anchored suspension bridge. In the later maintenance and structural replacement phase of the bridge, the construction measure system is restored by opening the tower beam end anchoring structure, reinstalling the temporary bracket and temporary cable, and transferring the load of the main cable 7, thereby achieving the replacement construction of the main cable 7 of the self-anchored suspension bridge without affecting the normal operation and use function of the bridge.

[0086] Embodiment 4

[0087] Please refer to Figures 4a to 4e In order to solve the problem that the middle span main beam 6 of the self-anchored suspension bridge across the waterway cannot be constructed while ensuring the normal passage of the waterway, the embodiment of the present invention further provides a construction method for installing the main beam of the self-anchored suspension bridge, which adopts the construction measure system for installing the main beam of the self-anchored suspension bridge or replacing the main cable of the above embodiment 1, including:

[0088] Step S301: construct bridge piers 9 and main towers 5 across the waterway, and install multiple tower end anchor structures 3 symmetrically spaced longitudinally on each main tower 5 along the direction of the bridge.

[0089] Step S302: construct temporary supports 1 on both sides of each main tower 5 along the bridge direction.

[0090] Step S303 : placing the side span main beam 6 equipped with the beam end anchoring structure 4 on the temporary support 1 , the pier 9 and the main tower 5 .

[0091] Step S304: connect the middle span main beam 6 installed with the beam end anchoring structure 4 between it and the main tower 5 through temporary buckle cables 2 and set it on the temporary support 1 on the middle span side until the middle span main beam 6 and the side span main beam 6 are closed.

[0092] Step S305: Install the main cable 7 on the side span main beam 6 and the main tower 5, install the vertically distributed hangers 8 between the main cable 7 and the main beam 6, tension the hangers 8 between the main beam 6 and the main cable 7, and convert the temporary force-bearing system of the main beam 6 by the temporary cable 2 and the temporary support 1 into a permanent force-bearing system of the main beam 6 by the main cable 7 and the hangers 8, thereby completing the conversion of the main beam 6 force system.

[0093] Step 306: Remove the temporary cable 2 and temporary support 1, and close the tower end anchor structure 3 and the beam end anchor structure 4 with a cover plate. The bridge deck and its auxiliary structures can be constructed on the main beam 6 to complete the overall construction of the self-anchored suspension bridge.

[0094] In the construction method for installing the main beam of a self-anchored suspension bridge provided in the fourth embodiment of the present invention, before the construction of the temporary cables 2, the side span main beam 6 is temporarily supported and stressed by the temporary bracket 1; after the construction of the temporary cables 2, the side span main beam 6 is also temporarily tensioned and stressed by the tensioning force of the temporary cables 2 on the main tower 5 and the main beam 6, thereby ensuring the stability and safety of the side span main beam 6. After the construction of the temporary cables 2, the middle span main beam 6 is temporarily tensioned by the tensioning force of the temporary cables 2, and is temporarily supported by the temporary support 1 on the middle span side. At this time, the side span main beam 6 and the middle span main beam 6 are both temporarily stressed doubly, that is, the closed main beam 6 bears the structural load of the self-anchored suspension bridge through the combination of the temporary support 1 and the temporary cables 2, thereby ensuring the stability and reliability of the middle span main beam 6 during the installation process, solving the problem that the middle span main beam 6 of the self-anchored suspension bridge across the waterway cannot be constructed while ensuring the normal passage of the waterway, is not restricted by the site and the surrounding environment, and is conducive to ensuring construction safety and controlling construction quality.

[0095] Embodiment 5

[0096] In order to solve the problem that it is difficult to replace the main cable of the existing self-anchored suspension bridge, the embodiment of the present invention further provides a construction method for replacing the main cable of the self-anchored suspension bridge formed by the construction method of the self-anchored suspension bridge of the fourth embodiment, comprising:

[0097] Step S401, open the tower end anchoring structure 3 and the beam end anchoring structure 4 of the self-anchored suspension bridge by opening the cover plate to restore the use function of the tower end anchoring structure 3 and the beam end anchoring structure 4, construct temporary supports 1 on both sides of each main tower 5 along the bridge direction, and set a jack on the top of each temporary support 1.

[0098] Step S402: Install several groups of temporary cables 2 symmetrically distributed on both sides of each main tower 5 along the bridge through the tower end anchoring structure 3 of the main tower 5 and the beam end anchoring structure 4 of the main beam 6, and tension the temporary cables 2; lift the jack on the temporary support 1 to apply prestress to the main beam 6, and convert the permanent force-bearing system of the main cable 7 and the hanger 8 on the main beam 6 into a temporary force-bearing system of the temporary cables 2 and the temporary support 1 on the main beam 6, thereby completing the conversion of the force system of the main beam 6.

[0099] Step S403: dismantle the suspension rod 8 and the main cable 7 and replace the main cable 7.

[0100] Step S404: Install the hanger 8 between the replaced main cable 7 and the main beam 6, tension the hanger 8, and convert the temporary force-bearing system of the main beam 6 composed of the temporary cable 2 and the temporary support 1 into a permanent force-bearing system of the main cable 7 and the hanger 8, thereby completing the conversion of the force system of the main beam 6.

[0101] Step S405: Unload and remove the jack, remove the temporary support 1 and the temporary cable 2, close the tower end anchor structure 3 and the beam end anchor structure 4 with a cover plate, and complete the main cable 7 replacement construction of the self-anchored suspension bridge.

[0102] The construction method for replacing the main cable of the self-anchored suspension bridge provided in the fifth embodiment of the present invention is to complete the first conversion of the main beam 6 force system by converting the bridge load of the self-anchored suspension bridge of the above-mentioned structure from the permanent force system of the main cable 7 and the hanger 8 to the temporary force system of the main beam 6 by the temporary buckle cable 2 and the temporary bracket 1, thereby realizing the transfer of the load of the self-anchored suspension bridge, thereby unloading the load of the old main cable 7 and realizing the replacement of the main cable 7 of the self-anchored suspension bridge. After the main cable 7 is replaced, the temporary buckle cable 2 and the temporary bracket are replaced. The temporary force-bearing system of the main beam 6 is converted into a permanent force-bearing system of the main cable 7 and the hanger 8, thus completing the second conversion of the force-bearing system of the main beam 6, i.e., the bridge load is borne by the temporary force-bearing system before the main cable 7 is replaced, and the bridge load is borne by the permanent force-bearing system after the main cable 7 is replaced. Thus, during the replacement construction of the main cable 7, the normal use of the self-anchored suspension bridge is not affected, thus solving the problem that the main cable 7 of the existing self-anchored suspension bridge with the above structure cannot be replaced or is difficult to replace due to other factors such as expiration of service life or damage, which makes it unsafe.

[0103] The construction measure system, use method and construction method for the installation of the main beam or replacement of the main cable of a self-anchored suspension bridge provided in the embodiment of the present invention is a new type of cantilever assembly main beam installation and main cable replacement installation process using the inclined cable method. There is no need to set up a temporary cable tower to inclinedly pull the temporary cable 2. The cantilever assembly of the main beam 5 is achieved by connecting the temporary cable 2 through the tower end anchoring structure 3 on the main tower 5 and the beam end anchoring structure 4 on the main beam 6. The main beam 6 is inclinedly pulled by the temporary cable 2, so that the main cable 7 can be replaced, which reduces the construction difficulty and construction cost.

[0104] The present invention is not limited to the above-mentioned specific implementation modes. Obviously, the above-mentioned embodiments are only some embodiments of the embodiments of the present invention, but not all embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention. Those skilled in the art can make other levels of modifications and changes to the present invention. In this way, if these modifications and changes of the present invention fall within the scope of the claims of the present invention, the present invention is also intended to include these changes and changes.

Claims

1. A construction measure system for installing the main beam or replacing the main cable of a self-anchored suspension bridge, characterized in that: Including temporary supports, temporary cables, tower end anchoring structure and beam end anchoring structure; The temporary supports are arranged symmetrically on both sides of the bridge, and are divided into two parts: the middle span side and the side span side. The temporary supports on the middle span side are arranged close to the outside of the river navigation hole, and the temporary supports on the side span side are arranged in multiple groups, respectively located near the main tower, the middle of the side span area, and the anchorage section of the main cable of the side span; There are 4 groups of temporary cables, which are respectively arranged at the vertical surfaces of the tower columns of the 4 main towers of the self-anchored suspension bridge along the bridge. Each group of temporary cables consists of several pairs of cables, which are divided into two parts: the middle span side and the side span side. One end of the temporary cable is connected to the main tower through the tower end anchoring structure, and the other end of the temporary cable is connected to the main beam through the beam end anchoring structure. The tower end anchoring structure is composed of four groups, which are arranged in the tower columns of the four main towers of the self-anchored suspension bridge respectively, and are divided into two parts: the middle span side and the side span side. The tower end anchoring structure is composed of a tower end conduit and a tower end anchor plate. One end of the temporary cable passes through the tower end conduit of the tower end anchoring structure, and tensioning and anchoring are completed at the rear end of the tower end anchor plate. The beam end anchoring structure is arranged in the main beam structure and is divided into two parts, the middle span side and the side span side. The beam end anchoring structure consists of a beam end guide tube and a beam end anchor plate. One end of the temporary cable passes through the beam end guide tube of the beam end anchoring structure, and tensioning and anchoring are completed at the rear end of the beam end anchor plate.

2. The construction measure system for installing the main beam or replacing the main cable of a self-anchored suspension bridge according to claim 1 is characterized in that: The load of the main beam section in the middle span area is borne jointly by the temporary support and temporary cables on the middle span side. The temporary support on the middle span side is arranged near the outside of the river navigation hole, and bears the load of the main beam section from the main tower to the non-navigation hole. The temporary cables are arranged within the main beam section above the navigation hole, and bear the load of the main beam section within the navigation hole.

3. The construction measure system for installing the main beam or replacing the main cable of a self-anchored suspension bridge according to claim 1, characterized in that: Each temporary cable corresponds to a tower end anchor structure and a beam end anchor structure. One end of the temporary cable is connected and anchored to the tower end anchor structure, and the other end is connected and anchored to the beam end anchor structure, forming a force transmission system to transfer the main beam load to the main tower.

4. The construction measure system for installing the main beam or replacing the main cable of a self-anchored suspension bridge according to claim 1, characterized in that: The tower end anchoring structure is a hidden structure, arranged on one side inside the main tower, avoiding the cross-section of the main cable and the hanger of the suspension bridge; after the bridge construction is completed, the tower end duct is closed with a cover plate, and the tower end anchoring structure is retained inside the main tower. When it is necessary to restore this measure system at a later time, the cover plate of the tower end duct port is opened to restore the use function of the tower end anchoring structure.

5. The construction measure system for installing the main beam or replacing the main cable of a self-anchored suspension bridge according to claim 1, characterized in that: The beam end anchoring structure is a semi-hidden structure, arranged inside the main beam box chamber, and part of the beam end conduit passes through the main beam bridge deck and extends out of the bridge deck; after the bridge construction is completed, the part of the beam end conduit extending out of the bridge deck is cut off and closed with a cover plate, and the beam end anchoring structure is retained inside the main beam. When it is necessary to restore this measure system later, the cover plate of the beam end conduit port is opened, and the beam end conduit is extended to restore the use function of the beam end anchoring structure.

6. The construction measure system for installing the main beam or replacing the main cable of a self-anchored suspension bridge according to claim 1, characterized in that: The number of temporary cables arranged on the mid-span side is the same as the number of main beam sections within the navigation channel.

7. The method for using the construction measure system for installing the main beam or replacing the main cable of a self-anchored suspension bridge according to claim 1, characterized in that: During the main beam installation construction phase of the self-anchored suspension bridge, the main beam installation for the self-anchored suspension bridge includes: Step S101: constructing main towers across the waterway, and symmetrically installing a plurality of longitudinally spaced tower end anchoring structures on each main tower along the bridge direction; Step S102: constructing a temporary support; Step S103: placing the side span main beam with the beam end anchoring structure installed on the temporary support and the main tower; Step S104: connecting the middle span main beam with the beam end anchoring structure installed between it and the main tower through temporary buckles and setting it on the temporary bracket on the middle span side until the middle span middle beam and the side span main beam are closed; Step S105: Install main cables on the side span main beam and the main tower, install vertically distributed hangers between the main cables and the main beam, tension the hangers, and convert the temporary force system of the main beam by temporary cables and temporary brackets into a permanent force system of the main beam by main cables and hangers, thus completing the conversion of the main beam force system; Step 106: Remove the temporary cables and temporary brackets, close the tower end anchor structure and the beam end anchor structure with cover plates, and complete the main beam installation of the self-anchored suspension bridge.

8. The method for using the construction measure system for installing the main beam or replacing the main cable of a self-anchored suspension bridge according to claim 1, characterized in that: During the main cable replacement construction phase of the self-anchored suspension bridge, the main cable replacement construction for the self-anchored suspension bridge includes: Step S201, opening the tower end anchoring structure and the beam end anchoring structure of the self-anchored suspension bridge by opening the cover plate, restoring the use function of the tower end anchoring structure and the beam end anchoring structure, constructing temporary supports, and setting jacks on the top of each temporary support; Step S202: Install temporary cables and tension them; lift the jack on the temporary support to apply prestress to the main beam, convert the permanent force system of the main beam by the main cable and the hanger rod to the temporary force system of the main beam by the temporary cables and the temporary support, and complete the conversion of the main beam force system; Step S203: dismantle the suspension rod and the main cable and replace the main cable; Step S204: Install and tension the suspender rod, convert the temporary force-bearing system of the main beam by the temporary cable and the temporary bracket into the permanent force-bearing system of the main beam by the main cable and the suspender rod, and complete the conversion of the main beam force-bearing system; Step S205: Unload and remove the jack, remove the temporary support and temporary cable, close the tower end anchor structure and the beam end anchor structure with a cover plate, and complete the main cable replacement construction of the self-anchored suspension bridge.

9. A construction method for installing a main beam of a self-anchored suspension bridge, characterized in that: A construction measure system for installing the main beam or replacing the main cable of a self-anchored suspension bridge according to any one of claims 1 to 6, comprising: Step S301: construct bridge piers and main towers across the waterway, and install multiple tower end anchor structures symmetrically spaced longitudinally on each main tower along the bridge direction; Step S302: construct temporary supports on both sides of each main tower along the bridge direction; Step S303: placing the side span main beam with the beam end anchoring structure installed on the temporary support, piers and main tower; Step S304: connecting the middle span main beam with the beam end anchoring structure installed between it and the main tower through temporary buckles and setting it on the temporary bracket on the middle span side until the middle span main beam and the side span main beam are closed; Step S305: Install main cables on the side span main beam and the main tower, install vertically distributed hangers between the main cables and the main beam, tension the hangers between the main beam and the main cables, and convert the temporary force system of the main beam by temporary cables and temporary brackets into a permanent force system of the main beam by main cables and hangers, thus completing the conversion of the main beam force system; Step 306: Remove the temporary cables and temporary brackets, and close the tower end anchor structure and the beam end anchor structure with cover plates.

10. A construction method for replacing the main cable of a self-anchored suspension bridge formed according to the construction method of a self-anchored suspension bridge according to claim 9, characterized in that: include: Step S401, opening the tower end anchoring structure and the beam end anchoring structure of the self-anchored suspension bridge by opening the cover plate to restore the use function of the tower end anchoring structure and the beam end anchoring structure, constructing temporary supports on both sides of each main tower along the bridge direction, and setting a jack on the top of each temporary support; Step S402: installing a plurality of temporary cables symmetrically distributed on both sides of each main tower along the bridge through the tower end anchoring structure of the main tower and the beam end anchoring structure of the main beam, and tensioning the temporary cables; lifting the jack on the temporary support to apply prestress to the main beam, converting the permanent force system of the main beam by the main cable and the suspender rod to the temporary force system of the main beam by the temporary cables and the temporary support, and completing the conversion of the main beam force system; Step S403: dismantle the suspension rod and the main cable and replace the main cable; Step S404: installing a hanger between the replaced main cable and the main beam, tensioning the hanger, converting the temporary force-bearing system of the main beam by the temporary cable and the temporary bracket to the permanent force-bearing system of the main cable and the hanger, and completing the conversion of the main beam force system; Step S405: Unload and remove the jack, remove the temporary support and temporary cable, close the tower end anchor structure and the beam end anchor structure with a cover plate, and complete the main cable replacement construction of the self-anchored suspension bridge.

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