Up-down combined bearing type cantilever bridge fabrication machine and bridge fabrication method

Abstract

The invention relates to the field of bridge fabrication machines, in particular to an up-down combined bearing type cantilever bridge fabrication machine and a bridge manufacturing method. The upper and lower combined bearing type cantilever bridge fabrication machine comprises an upper main truss assembly, a lower main truss assembly and a lower main truss assembly, the lower main truss assembly is arranged below the bridge floor of the bridge; the main body part of the front connecting cross beam is overlapped on the upper main truss component, and the end part of the front connecting cross beam bypasses a wing plate of the bridge, extends below the bridge floor and is fixedly connected with the front end of the lower main truss component; the main body part of the middle connecting cross beam is mounted on the upper main truss assembly, and the end part of the middle connecting cross beam bypasses a wing plate of the bridge, extends to the lower part of the bridge floor, is connected with the middle position of the lower main truss assembly and is used for supporting the lower main truss assembly when the lower main truss assembly runs relative to the upper main truss assembly; the jacking mechanism is arranged at the rear end of the lower main truss assembly and used for abutting against the lower surface of the wing plate so as to limit forward inclination of the front end of the lower main truss assembly. The front end of the bottom basket system is connected to the front connecting cross beam or the upper main truss assembly, and the rear end of the bottom basket system is connected to the lower main truss assembly.

Description

Technical Field

[0001] This application relates to the field of bridge building machines, and more particularly to a combined upper and lower load-bearing cantilever bridge building machine and a bridge manufacturing method. Background Technology

[0002] Under-deck bridge-building machines, with their main load-bearing structure located beneath the bridge beam, are widely used in the construction of long-span, heavy-load bridges. However, current technology still has significant limitations. When construction faces high load-bearing requirements, the core load-bearing components, such as the main beam and main truss, need to increase their cross-sectional dimensions and material usage to meet strength and stiffness requirements, resulting in bulky components and a heavy overall structure. This not only significantly increases the space occupied by the bridge-building machine but also brings many inconveniences to transportation, hoisting, and on-site installation. Especially in high-pier conditions, the lifting capacity and operating range of the hoisting equipment are limited, easily leading to blind spots in hoisting, increasing installation difficulty and safety risks. At the same time, it reduces the flexibility and adaptability during construction, making it difficult to meet the high-efficiency operation requirements of complex construction scenarios. Summary of the Invention

[0003] This application provides a combined upper and lower load-bearing cantilever bridge building machine to solve the problems of excessive size and inconvenience of use in existing bridge building machines.

[0004] This application also provides a bridge manufacturing method.

[0005] According to an embodiment of the first aspect of this application, a combined upper and lower load-bearing cantilever bridge building machine includes: The upper main truss assembly is located above the bridge deck; The lower main truss assembly is located below the bridge deck; The front connecting beam has its main body overlapping the upper main truss assembly, and its end extends around the wing plate of the bridge to the underside of the bridge deck and is fixedly connected to the front end of the lower main truss assembly. The front connecting beam is movable relative to the upper main truss assembly. The front connecting beam is used to bear part of the pouring load during the pouring process and to transfer the load to the upper main truss assembly and the lower main truss assembly respectively. The middle connecting beam is mainly installed on the upper main truss assembly, and its end extends around the wing plate of the bridge to connect with the lower main truss assembly at the middle position below the bridge deck, so as to support the lower main truss assembly when the lower main truss assembly travels relative to the upper main truss assembly; the middle connecting beam and the front connecting beam travel with the lower main truss assembly; A lifting mechanism is provided at the rear end of the lower main truss assembly to abut against the lower surface of the wing plate, thereby limiting the forward tilting of the front end of the lower main truss assembly; The bottom basket system is connected at the front end to the front connecting crossbeam or the upper main truss assembly, and at the rear end to the lower main truss assembly; The supporting traveling mechanism includes traveling wheels and a support unit installed below the central connecting beam; the traveling wheels are used to contact the upper main truss assembly to facilitate the travel of the upper main truss assembly or the lower main truss assembly; the support unit is used to support the central connecting beam on the bridge deck during casting, thereby separating the traveling wheels from the upper main truss assembly.

[0006] According to one embodiment of this application, the connecting beam includes: The main body of the crossbeam is installed on the upper main truss assembly, and its end extends beyond the bridge deck by passing around the wing plate of the bridge. The hanging leg, fixed to the main body of the crossbeam and extending toward the main body of the bridge, is used to install the lower main truss assembly.

[0007] According to one embodiment of this application, the upper and lower combined load-bearing cantilever bridge building machine further includes: The load-bearing switching mechanism is installed on the hanging leg and connected to the lower main truss assembly; The first hanging mechanism is fixed at its upper end to the middle connecting beam and at its lower end to the load-bearing switching mechanism. During the pouring process, the first hanging mechanism lifts the load-bearing switching mechanism so that the hanging leg does not bear the weight of the lower main truss assembly. The first hanging mechanism is removed before the upper main truss assembly or the lower main truss assembly moves.

[0008] According to one embodiment of this application, the bearer switching mechanism includes: A through-hole is inserted into the hanging leg, and a support portion is formed at the upper end to prevent the through-hole from falling out; the through-hole can slide up and down in the through-hole, and when the support portion abuts against the hanging leg, the hanging leg bears the weight of the lower main truss assembly; the through-hole is connected to the lower end of the first suspension mechanism. The first fastener securely connects the lower end of the through-hole component to the lower main truss assembly. or The load switching mechanism includes: The hanging component is provided with a through hole, and the end of the hanging leg passes through the through hole; the height of the through hole is greater than the thickness of the end of the hanging leg, so that when the hanging component is attached to the end of the hanging leg, the hanging leg bears the weight of the lower main truss assembly. The second fastener securely connects the lower end of the hanging component to the lower main truss assembly.

[0009] According to one embodiment of this application, the upper and lower combined load-bearing cantilever bridge building machine further includes: An anchoring device is installed at the rear end of the upper main truss assembly to anchor the rear end of the upper main truss assembly to the bridge during pouring, thereby limiting the forward tilting of the front end of the upper main truss assembly.

[0010] According to one embodiment of this application, the upper and lower combined load-bearing cantilever bridge building machine further includes: A traveling mechanism is installed on the lower surface of the upper main truss assembly and contacts the bridge deck to enable the upper main truss assembly to move relative to the bridge deck; A drive mechanism is mounted on the upper main truss assembly, and its output end is connected to the middle connecting beam to drive the middle connecting beam and the lower main truss assembly to move relative to the upper main truss assembly.

[0011] According to one embodiment of this application, the front connecting beam has the same structure as the middle connecting beam.

[0012] According to one embodiment of this application, the upper and lower combined load-bearing cantilever bridge building machine further includes: The second suspension mechanism is connected at its upper end to the middle position of the lower main truss assembly and at its lower end to the rear end of the bottom basket system. The third suspension mechanism is connected at its upper end to the bottom of the bridge and at its lower end to the rear end of the basket system; and is removed before the lower main truss assembly travels. The fourth hanging mechanism is connected at its upper end to the front connecting beam and at its lower end to the front end of the bottom basket system. The fifth suspension mechanism is connected at its upper end to the front end of the lower main truss assembly and at its lower end to the front end of the bottom basket system.

[0013] According to one embodiment of this application, the fixed position height of the hanging leg on the main body of the crossbeam is adjustable.

[0014] According to one embodiment of this application, the lifting mechanism includes: A hydraulic support assembly is used to hold the lower surface of the wing plate against the pouring process to limit the forward tilting of the front end of the lower main girder assembly. An anti-top wheel is used to abut against the lower surface of the wing plate when the lower main truss assembly travels, thereby limiting the forward tilting of the front end of the lower main truss assembly.

[0015] According to one embodiment of this application, the upper main girder assembly includes two upper main girder units, which are arranged side by side along the transverse bridge direction; The lower main girder assembly includes two lower main girder units, which are respectively arranged on both sides of the bridge.

[0016] According to one embodiment of this application, the upper and lower combined load-bearing cantilever bridge building machine further includes: The rear connecting beam is fixedly installed at the rear end of the upper main truss assembly.

[0017] A bridge manufacturing method according to a second aspect of this application, the bridge manufacturing method using the aforementioned combined upper and lower load-bearing cantilever bridge building machine, includes: The first pour is made at the initial position; The lower main truss assembly and the base basket system move forward; The upper main truss assembly moves forward; The second pouring is then carried out.

[0018] According to one embodiment of this application, before the upper main girder assembly travels forward, it further includes: Material hoisting operations are being carried out.

[0019] According to one embodiment of this application, before the lower main truss assembly and the basket system move forward, the following is further included: Remove the third suspension mechanism between the basket system and the bottom of the bridge; The first suspension mechanism connecting the crossbeam and the load-bearing switching mechanism during dismantling; The hydraulic support assembly in the lifting mechanism retracts, causing the anti-jacking wheel to press against the lower surface of the wing plate; The support unit in the supporting traveling mechanism retracts, allowing the traveling wheels to contact the upper main truss assembly for travel; After the lower main truss assembly and the basket system have moved forward, the system further includes: Install a third suspension mechanism located between the basket system and the bottom of the bridge.

[0020] According to one embodiment of this application, before the upper main girder assembly travels forward, it further includes: Remove the anchoring device at the rear end of the upper main truss assembly; After the upper main truss assembly has traveled forward, the following is also included: Install anchoring devices located at the rear end of the upper main truss assembly; Install the first suspension mechanism located between the central connecting beam and the load switching mechanism; The hydraulic support assembly in the lifting mechanism extends and abuts against the lower surface of the wing plate, and separates the anti-jacking wheel from the lower surface of the wing plate; The support unit in the supporting running mechanism extends and supports the bridge deck, and separates the running wheels from the upper main truss assembly.

[0021] According to one embodiment of this application, the lower main truss assembly and the basket system travel forward, including: The upper main truss assembly remains stationary, while the drive mechanism propels the lower main truss assembly forward to the second pouring position.

[0022] According to one embodiment of this application, the upper main truss assembly is fixed, and the drive mechanism drives the lower main truss assembly forward to the second pouring position, including: The front and middle connecting beams advance with the lower main truss assembly; the rear connecting beam remains stationary with the upper main truss assembly.

[0023] According to one embodiment of this application, the upper main truss assembly travels forward, including: The lower main truss assembly remains stationary, while the drive mechanism propels the upper main truss assembly forward to the second pouring position.

[0024] The above-described one or more technical solutions in the embodiments of this application have at least one of the following technical effects: The combined upper and lower load-bearing cantilever bridge-building machine of this application differs from existing simple upper-bearing or lower-bearing bridge-building machines. It includes an upper main truss assembly located above the bridge deck and a lower main truss assembly located below the bridge deck. The front end of the bottom basket system is connected to the upper main truss assembly or the front connecting beam. That is, the front end of the bottom basket system directly transfers the load to the upper main truss assembly or through the front connecting beam, and then to the bridge deck. The rear end of the bottom basket system is connected to the lower main truss assembly. That is, the rear end of the bottom basket system directly transfers the load to the lower main truss assembly, and then through the support unit (during pouring), to the bridge deck. The load during pouring is shared by the upper and lower main truss assemblies, which significantly reduces the load borne by a single main truss assembly, thereby effectively reducing the size of the upper and lower main truss assemblies and facilitating bridge construction.

[0025] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a structural schematic diagram of the upper and lower combined load-bearing cantilever bridge building machine provided in this application. Figure 1 .

[0028] Figure 2 for Figure 1 Sectional view of AA.

[0029] Figure 3 for Figure 2 Enlarged view of the structure of section D in the middle.

[0030] Figure 4 Another structural schematic diagram of the load switching mechanism provided in this application (and) Figure 3(These are parallel technical solutions).

[0031] Figure 5 for Figure 1 BB section view.

[0032] Figure 6 for Figure 1 CC section view.

[0033] Figure 7 This is a schematic diagram of the travel of the lower main truss assembly provided in this application.

[0034] Figure 8 This is a schematic diagram of the travel of the upper main truss assembly provided in this application.

[0035] Figure 9 This is a schematic diagram of the combined upper and lower load-bearing cantilever bridge building machine provided in this application applied to the pouring of left and right spans of a bridge.

[0036] Figure 10 This is a schematic diagram of the combined upper and lower load-bearing cantilever bridge-building machine provided in this application applied to the casting of multi-box bridges.

[0037] Figure 11 This is a flowchart illustrating the bridge manufacturing method provided in this application. Figure 1 .

[0038] Figure 12 This is a flowchart illustrating the bridge manufacturing method provided in this application. Figure 2 .

[0039] Figure label: 1. Upper main truss assembly; 11. Upper main truss unit; 2. Lower main truss assembly; 21. Lower main truss unit; 31. Front connecting crossbeam; 32. Middle connecting crossbeam; 321. Crossbeam body; 3211. Crossbeam rod; 3212. Bent rod; 322. Hanging leg; 3221. Through hole; 33. Rear connecting crossbeam; 4. Lifting mechanism; 41. Hydraulic support assembly; 42. Anti-jacking wheel; 5. Basket system; 61. Supporting traveling mechanism; 611. Traveling wheel; 612. Support unit; 62. Load-bearing switching mechanism; 621. Through-hole component; 622. Support part; 623. First fastener; 624. Hanging component; 6241. Through-hole; 625. Second fastener; 63. First hanging mechanism; 64. Second hanging mechanism; 65. Third hanging mechanism; 66. Fourth hanging mechanism; 67. Fifth hanging mechanism; 71. Anchoring device; 72. Drive mechanism; 81. Wing plate; 82. Web plate. Detailed Implementation

[0040] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but should not be used to limit the scope of this application.

[0041] In the description of the embodiments of this application, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0043] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0044] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0045] According to an embodiment of the first aspect of this application, a combined upper and lower load-bearing cantilever bridge-building machine is provided, such as... Figure 1 and Figure 2 As shown, the upper and lower combined load-bearing cantilever bridge building machine includes an upper main truss assembly 1, a lower main truss assembly 2, a front connecting crossbeam 31, a middle connecting crossbeam 32, a lifting mechanism 4, a bottom basket system 5, and a support and traveling mechanism 61. The upper main truss assembly 1 is positioned above the bridge deck; the lower main truss assembly 2 is positioned below the bridge deck; the main body of the front connecting beam 31 overlaps the upper main truss assembly 1, and its end extends below the bridge deck, bypassing the bridge's wing plate 81, and is fixedly connected to the front end of the lower main truss assembly 2; the front connecting beam 31 is movable relative to the upper main truss assembly 1 (the front connecting beam 31 and the lower main truss assembly 2 move together relative to the upper main truss assembly 1), and is used to bear the aforementioned lifting point load (i.e., partial casting load) of the bottom basket during casting, and to transfer the load to the upper main truss assembly 1 and the lower main truss assembly 2 respectively; the main body of the middle connecting beam 32 is installed on the upper main truss assembly 1, and its end extends below the bridge deck, bypassing the bridge's wing plate 81, and is connected to the middle position of the lower main truss assembly 2, for the purpose of... The lower main truss assembly 2 is supported when traveling relative to the upper main truss assembly 1; the middle connecting beam 32 and the front connecting beam 31 travel with the lower main truss assembly 2; the lifting mechanism 4 is located at the rear end of the lower main truss assembly 2 and is used to abut against the lower surface of the wing plate 81 to limit the forward tilting of the front end of the lower main truss assembly 2; the front end of the bottom basket system 5 is connected to the front connecting beam 31 or the upper main truss assembly 1, and the rear end is connected to the lower main truss assembly 2; the supporting traveling mechanism 61 includes a traveling wheel 611 and a support unit 612 installed below the middle connecting beam 32; the traveling wheel 611 is used to contact the upper main truss assembly 1 to facilitate the travel of the upper main truss assembly 1 or the lower main truss assembly 2; the support unit 612 is used to support the middle connecting beam 32 on the bridge deck during pouring, so that the traveling wheel 611 is separated from the upper main truss assembly 1.

[0046] It should be noted that, Figure 1 The bridge is displayed as a dashed line to distinguish it from the bridge-building machine's related structures. Figure 7In the diagram, the bridge consists of solid lines and dashed lines. The dashed lines represent newly poured sections (that have solidified to the preset strength).

[0047] For example, the middle position of the lower main truss assembly 2 refers to the position between the front end and the rear end of the lower main truss assembly 2 along the longitudinal direction of the bridge. At the overlap position between the main body of the front connecting beam 31 and the upper main truss assembly 1, components such as wheels can be installed to reduce friction during relative movement. The support unit 612 can be a hydraulic support unit; however, in some cases, an electric or pneumatic support unit can also be used.

[0048] The upper main truss assembly 1 and the lower main truss assembly 2 form a double-load-bearing structure, positioned vertically opposite each other on the upper and lower sides of the bridge deck, respectively. They are connected by a front connecting beam 31 and a middle connecting beam 32, forming a complete load-bearing frame. The front connecting beam 31 is mainly mounted on the upper main truss assembly 1, with its end cross-plate 81 fixed to the front end of the lower main truss assembly 2. Its design allows it to move and separate relative to the upper main truss assembly 1, accommodating the independent movement of both the upper and lower main truss assemblies, while also providing support for the lower main truss assembly 2 during casting. The middle connecting beam 32 connects to the middle position of the lower main truss assembly 2, maintaining its stability during movement and preventing swaying. It also moves synchronously with the lower main truss assembly 2, ensuring the consistency of the upper and lower structures. The lifting mechanism 4 is located at the rear end of the lower main truss assembly 2, forming a reverse support by abutting against the lower surface of the cross-plate 81. This prevents the rear end of the lower main truss assembly 2 from lifting, balances the front load, and limits the forward tilting tendency of the front end. The bottom basket system 5 adopts a front and rear split connection method. The front load is transferred to the bridge deck through the upper main truss assembly 1, and the rear load is transmitted through the lower main truss assembly 2. During the pouring, the support unit 612 supports the middle connecting beam 32 on the bridge deck, so that the traveling wheel 611 is disengaged, realizing the switching between the load-bearing and traveling states. During the travel, the traveling wheel 611 and the upper main truss assembly 1 are used to complete the movement.

[0049] The bridge employs a dual-main-truss assembly arrangement, altering the traditional single-load-bearing mode. During pouring, the load is shared by both the upper main truss assembly 1 and the lower main truss assembly 2, significantly reducing the load pressure on individual main truss assemblies compared to purely upper-bearing or lower-bearing bridge-building machines. This avoids simply increasing the cross-sectional dimensions of components to meet load-bearing requirements, effectively reducing the volume and weight of the upper and lower main truss assemblies 1 and 2, minimizing space occupation, facilitating transportation, hoisting, and on-site installation, and adapting to the needs of high piers and narrow working environments. The front connecting beam 31 and the middle connecting beam 32, spanning the wing plate 81, connect the upper and lower main truss assemblies 1 and 2, ensuring the overall structural rigidity and stability while adapting to the support requirements of pouring and traveling conditions, achieving a smooth transition during mode switching. The lifting mechanism 4, by abutting against the wing plate 81, restricts the forward tilting of the front end of the lower main truss assembly 2, improving operational safety. The support unit 612 of the supporting traveling mechanism 61 is designed to switch with the traveling wheel 611. It forms a stable support during pouring and reduces movement resistance during travel, taking into account both load-bearing reliability and construction flexibility, and improving the adaptability of operation under complex working conditions.

[0050] According to one embodiment of this application, such as Figure 2 As shown, the middle connecting beam 32 includes a beam body 321 and a hanging leg 322; wherein, the beam body 321 is installed on the upper main truss assembly 1, and its end extends below the bridge deck by passing around the wing plate 81 of the bridge; the hanging leg 322 is fixed on the beam body 321 and extends toward the main body of the bridge for installing the lower main truss assembly 2.

[0051] The central connecting beam 32 adopts a split structure design of beam body 321 and hanging leg 322, which is adapted to the spatial layout characteristics of the bridge deck and wing plate 81. The beam body 321, as the main load-bearing component, is assembled on the upper main truss assembly 1, and its end extends across the bridge wing plate 81 to below the bridge deck, realizing the spatial connection between the upper and lower structures. The hanging leg 322 is fixed at the end of the beam body 321 located below the bridge deck, extends in the direction towards the bridge body, and precisely connects to the middle position of the lower main truss assembly 2, providing vertical support for the lower main truss assembly 2. This split structure makes the functional division of each component clear. The beam body 321 undertakes the load-bearing function across the wing plate 81 and the assembly linkage function with the upper main truss assembly 1. The hanging leg 322 specifically realizes the connection and support with the lower main truss assembly 2. At the same time, the assembly structure of the beam body 321 and the upper main truss assembly 1 provides a structural foundation for the central connecting beam 32 to move synchronously with the lower main truss assembly 2, ensuring the continuous performance of the support function during movement.

[0052] The design employs a split structure, adapting to the spatial obstruction characteristics of the bridge wing plate 81. This facilitates the cross-space connection between the upper main truss assembly 1 and the lower main truss assembly 2, allowing the arrangement of the central connecting beam 32 to conform to the overall bridge structure and enhancing the rationality of the structural layout. The main beam 321 and the connecting legs 322 have clearly defined functions. The main beam 321 bears the primary span load, while the connecting legs 322 specifically connect and support the lower main truss assembly 2, effectively improving the overall load-bearing efficiency of the central connecting beam 32 and allowing for more direct transmission of support force. The arrangement of the connecting legs 322 extending towards the bridge body ensures that the connection point aligns with the arrangement of the lower main truss assembly 2, enhancing the support stability of the lower main truss assembly 2 and effectively suppressing its sway during movement, ensuring smooth travel. The split structure allows for individual processing and transportation of each component, reducing the difficulty of transporting large components and facilitating on-site assembly, thus reducing construction steps. The independent design of each component also makes later maintenance and partial replacement more convenient, improving the overall ease of use of the equipment.

[0053] For example, such as Figure 2 As shown, the main body of the crossbeam 321 includes a crossbeam rod 3211 and two L-shaped bent rods 3212. The two bent rods 3212 are connected to both ends of the crossbeam rod 3211 and extend below the bridge deck, passing around the wing plate 81 of the bridge. The hanging leg 322 is fixedly installed on the bent rod 3212. The crossbeam rod 3211 serves as the main body of the front connecting crossbeam 31 and is installed on the upper main truss assembly 1.

[0054] According to one embodiment of this application, such as Figure 1 and Figure 3 As shown, the upper and lower combined load-bearing cantilever bridge-building machine also includes: a load-bearing switching mechanism 62 and a first suspension mechanism 63; wherein, the load-bearing switching mechanism 62 is installed on the hanging leg 322 and connected to the lower main truss assembly 2; the first suspension mechanism 63 is fixed at the upper end to the middle connecting crossbeam 32 and at the lower end to the load-bearing switching mechanism 62; the first suspension mechanism 63 lifts the load-bearing switching mechanism 62 during pouring so that the hanging leg 322 does not bear the weight of the lower main truss assembly 2; the first suspension mechanism 63 is removed before the upper main truss assembly 1 or the lower main truss assembly 2 travels.

[0055] The load-bearing switching mechanism 62, acting as a connection intermediary between the hanging leg 322 and the lower main truss assembly 2, is movably mounted on the hanging leg 322; the load-bearing switching mechanism 62 and the lower main truss assembly 2 form a rigid connection. The first hanging mechanism 63 is a dedicated load-bearing component, with its upper end fixedly connected to the middle connecting beam 32 and its lower end precisely aligned with the load-bearing switching mechanism 62, forming an independent hanging load-bearing path. During the pouring operation, the first hanging mechanism 63 is in working condition. By lifting the load-bearing switching mechanism 62 upwards, the load of the lower main truss assembly 2 is transferred to the first hanging mechanism 63 via the load-bearing switching mechanism 62, and then transmitted to the middle connecting beam 32. At this time, the load path between the hanging leg 322 and the lower main truss assembly 2 is disconnected, and the hanging leg 322 does not bear the weight of the lower main truss assembly 2, thus avoiding deformation or damage to the hanging leg 322 due to excessive pouring load. Before the upper main truss assembly 1 or the lower main truss assembly 2 moves, the first suspension mechanism 63 is removed, the load switching mechanism 62 is restored to the load transfer state with the hanging leg 322, and the weight of the lower main truss assembly 2 is again borne by the hanging leg 322, ensuring the structural support stability during the movement and adapting to the stress requirements of different working conditions.

[0056] During pouring, the load path is transferred via the first suspension mechanism 63, transferring the load of the lower main truss assembly 2 from the hanging leg 322 to the central connecting beam 32, and then to the bridge deck via the support unit 612. This significantly reduces the load-bearing pressure on the hanging leg 322 during pouring, allowing for a reduction in the cross-sectional dimensions and material usage of the hanging leg 322, aligning with the overall lightweight design requirements of the equipment. The load-bearing switching mechanism 62 controls the on / off connection of load transfer between the hanging leg 322 and the lower main truss assembly 2, improving the overall structural stress rationality and optimizing the load transfer path. Before travel, the first suspension mechanism 63 is removed, allowing the hanging leg 322 to bear the weight of the lower main truss assembly 2, thus preventing the first suspension mechanism 63 from affecting travel. During pouring, the hanging leg 322 is in a no-pouring-load state, reducing fatigue wear caused by long-term alternating loads and extending the structural service life of the hanging leg 322. Furthermore, in conjunction with the combined load-bearing mode of the upper main truss assembly 1 and the lower main truss assembly 2, it further enhances the overall load-bearing efficiency and structural adaptability of the bridge-building machine.

[0057] According to one embodiment of this application, such as Figure 3 As shown, the hanging leg 322 is provided with a through hole 3221; the load-bearing switching mechanism 62 includes: a through member 621 and a first fastener 623; wherein, the through member 621 is inserted into the through hole 3221, and a support portion 622 is formed at the upper end to restrict the through member 621 from falling out of the through hole 3221; the through member 621 can slide up and down in the through hole 3221, and when the support portion 622 abuts against the hanging leg 322, the hanging leg 322 bears the weight of the lower main truss assembly 2; the through member 621 is connected to the lower end of the first suspension mechanism 63; the first fastener 623 fixes the lower end of the through member 621 to the lower main truss assembly 2.

[0058] A vertical through hole 3221 is provided on the hanging leg 322 to provide assembly and movement space for the load-bearing switching mechanism 62. The through member 621 is vertically inserted into the through hole 3221. The outer diameter of the integrally formed support part 622 at its upper end is larger than the diameter of the through hole 3221, forming a limit to prevent falling. At the same time, the through member 621 and the through hole 3221 are clearance fit, and can slide freely up and down along the through hole 3221. The lower end of the through member 621 is rigidly fixed to the lower main truss assembly 2 by the first fastener 623 to achieve stable load transmission. When the support part 622 abuts against the upper surface of the hanging leg 322, the weight of the lower main truss assembly 2 is transmitted to the hanging leg 322 through the through member 621 and the support part 622, and the hanging leg 322 bears the load. The through-piece 621 is connected to the lower end of the first hanging mechanism 63. During the pouring process, the first hanging mechanism 63 lifts the through-piece 621 upwards, causing the support part 622 to detach from the hanging leg 322. At this time, the load transmission path between the hanging leg 322 and the through-piece 621 is disconnected, and the hanging leg 322 does not bear the weight of the lower main truss assembly 2. The load is borne by the first hanging mechanism 63, realizing the switching of the load-bearing state under the pouring and traveling conditions.

[0059] The first fastener 623 can be a pin. The through hole 3221 on the hanging leg 322 is a vertically opened cylindrical light hole. The inner wall of the through hole 3221 is polished to reduce the sliding friction between it and the through part 621.

[0060] The sliding fit structure of the through-hole 3221 and the through-hole 621 enables mechanical switching of the load-bearing state. This eliminates complex transmission components, resulting in a simple and compact structure with high reliability during load switching and reduced maintenance costs. During pouring, the through-hole 621 is lifted by the first suspension mechanism 63, removing the hanging leg 322 from the load-bearing state. This reduces the cross-sectional dimensions and material usage of the hanging leg 322, meeting the overall lightweight design requirements of the bridge-building machine and minimizing fatigue wear. The load-bearing method of the support 622 abutting against the hanging leg 322 ensures a direct and short load transfer path, improving the load-bearing efficiency of the hanging leg 322 and guaranteeing structural stability during travel. The rigid connection of the first fastener 623 ensures no relative displacement between the through-hole 621 and the lower main truss assembly 2, preventing load swaying during load switching and improving the overall structural stability. Combined with the first suspension mechanism 63, this facilitates load switching operations and adapts to the operational needs of the construction site.

[0061] According to one embodiment of this application, such as Figure 4As shown, the load-bearing switching mechanism 62 includes a hanging member 624 and a second fastener 625; wherein, the hanging member 624 is provided with a through hole 6241, and the end of the hanging leg 322 passes through the through hole 6241; the height of the through hole 6241 is greater than the thickness of the end of the hanging leg 322, so that when the hanging member 624 overlaps the end of the hanging leg 322, the hanging leg 322 bears the weight of the lower main truss assembly 2; the second fastener 625 fixes the lower end of the hanging member 624 to the lower main truss assembly 2.

[0062] The load-bearing switching mechanism 62 consists of a hanging member 624 and a second fastener 625. The end of the hanging leg 322 passes through a pre-set through hole 6241 in the hanging member 624. The vertical height of the through hole 6241 is greater than the thickness of the end of the hanging leg 322, providing vertical movement space for the hanging member 624. When the hanging member 624 overlaps the end of the hanging leg, the weight of the lower main truss assembly 2 is transferred to the hanging member 624 via the second fastener 625, and then transferred from the hanging member 624 to the hanging leg 322, thus achieving load bearing on the hanging leg. The hanging member 624 can move vertically relative to the end of the hanging leg 322, cooperating with the first hanging mechanism 63 to switch the load transfer path and meet the load-bearing requirements of different working conditions such as pouring and traveling.

[0063] The second fastener 625 can be a pin.

[0064] According to one embodiment of this application, such as Figure 1 and Figure 6 As shown, the upper and lower combined load-bearing cantilever bridge building machine also includes an anchoring device 71; the anchoring device 71 is installed at the rear end of the upper main truss assembly 1 to anchor the rear end of the upper main truss assembly 1 to the bridge during pouring, so as to limit the forward tilting of the front end of the upper main truss assembly 1.

[0065] Anchoring device 71 is located at the rear end of the upper main truss assembly 1 to meet the structural stability requirements during pouring. During pouring, the bottom basket system 5 transfers the load to the upper main truss assembly 1 and the lower main truss assembly 2. The front end of the upper main truss assembly 1 is prone to tilting forward under the load. Anchoring device 71, through a rigid connection with the bridge, applies a restraining tensile force to the rear end of the main truss assembly. This restraint works in conjunction with the reverse support of the lifting mechanism 4 at the rear end of the lower main truss assembly 2 to balance the forward tilting moment from both the top and bottom, ensuring the stability of the overall load-bearing frame.

[0066] The anchoring device 71 can adopt a hydraulic anchor structure. The upper end of the anchor is fixed to the rear crossbeam of the upper main truss assembly 1 by bolts through a flange plate, and the lower end is equipped with a wedge-shaped anchor head, which is inserted into the pre-set anchoring hole of the bridge during pouring to tighten and fix it.

[0067] By anchoring the rear end of the upper main truss assembly 1 with anchoring device 71, the forward tilting moment generated by the front-end load is effectively balanced, improving the structural stability of the upper main truss assembly 1 under pouring conditions and ensuring pouring accuracy. It forms a coordinated constraint with the lifting mechanism 4 of the lower main truss assembly 2, optimizing the overall force balance, reducing the bearing pressure of individual constraint components, and allowing for a corresponding reduction in the structural dimensions of anchoring device 71 and lifting mechanism 4. Anchoring device 71 only operates during pouring and can be retracted before travel, without interfering with the bridge-building machine's movement function, balancing stability and flexibility. It prevents deformation of the upper main truss assembly 1 due to forward tilting, extending the structural service life, and is compatible with the combined upper and lower load-bearing mode, further improving the overall operational reliability of the bridge-building machine.

[0068] According to one embodiment of this application, such as Figure 1 As shown, the upper and lower combined load-bearing cantilever bridge building machine also includes a traveling mechanism and a drive mechanism 72; wherein, the traveling mechanism (not shown in the figure) is installed on the lower surface of the upper main truss assembly 1 and contacts the bridge deck to realize the movement of the upper main truss assembly 1 relative to the bridge deck; the drive mechanism 72 is installed on the upper main truss assembly 1 and its output end is connected to the middle connecting beam 32 to drive the front connecting beam 31, the middle connecting beam 32 and the lower main truss assembly 2 to move relative to the upper main truss assembly 1 as a whole.

[0069] The traveling mechanism is arranged along the length of the upper main truss assembly 1 on its lower surface, directly contacting the bridge deck. It provides the load-bearing and traveling basis for the overall movement of the upper main truss assembly 1 and serves as the structural support for the displacement of the upper main truss assembly 1 relative to the bridge deck. The drive mechanism 72 is assembled on the upper main truss assembly 1, and its output end is rigidly connected to the main beam 321 of the middle connecting beam 32. Relying on the fixed connection between the middle connecting beam 32 and the lower main truss assembly 2, the drive mechanism 72 drives the lower main truss assembly 2 to move synchronously by pushing the middle connecting beam 32, thereby realizing the independent displacement of the lower main truss assembly 2 relative to the upper main truss assembly 1.

[0070] The traveling mechanism and drive mechanism 72 can realize differentiated movement control of the upper truss assembly and the lower main truss assembly 2. The upper main truss assembly 1 can travel relative to the bridge deck as a whole, while the lower main truss assembly 2 can move independently relative to the upper main truss assembly 1, adapting to the travel needs of the cantilever bridge building machine at different construction stages and improving the operational flexibility of the equipment.

[0071] The specific structural forms of the traveling mechanism and the drive mechanism 72 can adopt the corresponding mechanisms in existing bridge-building machines, and their specific structural forms will not be described in detail here.

[0072] According to one embodiment of this application, the front connecting beam 31 and the middle connecting beam 32 have the same structure.

[0073] The front connecting beam 31 and the lower main truss assembly 2 can be directly fixedly connected, without the need for a structure similar to the load-bearing switching mechanism 62.

[0074] According to one embodiment of this application, such as Figure 2 and Figure 5 As shown, the upper and lower combined load-bearing cantilever bridge-building machine also includes a second suspension mechanism 64, a third suspension mechanism 65, a fourth suspension mechanism 66, and a fifth suspension mechanism 67. The upper end of the second suspension mechanism 64 is connected to the middle position of the lower main truss assembly 2, and the lower end is connected to the rear end of the bottom basket system 5; the upper end of the third suspension mechanism 65 is connected to the bottom of the bridge, and the lower end is connected to the rear end of the bottom basket system 5; the third suspension mechanism 65 is removed before the lower main truss assembly 2 travels; the upper end of the fourth suspension mechanism 66 is connected to the front connecting crossbeam 31, and the lower end is connected to the front end of the bottom basket system 5; the upper end of the fifth suspension mechanism 67 is connected to the front end of the lower main truss assembly 2, and the lower end is connected to the front end of the bottom basket system 5.

[0075] The second and third hanging mechanisms 64 and 65 support the rear end of the basket system 5, while the fourth and fifth hanging mechanisms 66 and 67 support the front end of the basket system 5. These four sets of hanging mechanisms form a multi-point support system for the basket system 5. The upper end of the third hanging mechanism 65 is connected to the bottom of the bridge, and the lower end is connected to the rear end of the basket system 5. During pouring, it transfers another portion of the load from the rear end of the basket to the bottom of the bridge. This mechanism only operates during the pouring process and is removed before the system is moved.

[0076] Each of the aforementioned suspension mechanisms may include two steel bars for suspension, that is, each suspension mechanism forms two suspension points.

[0077] The basket system 5 is supported by dual suspension mechanisms at both the front and rear ends, ensuring uniform stress during pouring and effectively reducing deformation caused by excessive unilateral load, thus improving the construction accuracy of the bridge pouring. The third suspension mechanism 65 transfers part of the basket load to the bottom of the bridge, directly sharing the load-bearing pressure of the lower main truss assembly 2. This allows for a corresponding reduction in the cross-sectional dimensions and material usage of the lower main truss assembly 2, aligning with the overall lightweight design concept of the bridge construction machine. The basket load is distributed to the upper main truss assembly 1, lower main truss assembly 2, and the bottom of the bridge through four sets of suspension mechanisms, adapting to the combined upper and lower load-bearing mode, optimizing the load transfer path of the overall equipment, and improving load-bearing efficiency. The third suspension mechanism 65 is removed before travel to avoid spatial interference with the traveling structure, ensuring smooth relative movement between the lower main truss assembly 2 and the upper main truss assembly 1. The functional division of each suspension mechanism allows the support state of the basket system 5 to adapt to different working conditions such as pouring and travel, improving the operational adaptability of the equipment.

[0078] According to one embodiment of this application, the fixed position height of the hanging leg 322 on the crossbeam body 321 is adjustable.

[0079] The hanging leg 322 and the main body of the crossbeam 321 adopt a height-adjustable connection structure. To accommodate the differences in the thickness of the wing plate 81 of different bridges, the vertical fixing position of the hanging leg 322 on the main body of the crossbeam 321 can be adjusted. After the adjustment is completed, the hanging leg 322 is re-fixed to ensure that the main body of the crossbeam 321 is adapted to the thickness of the wing plate 81 and achieves a reasonable arrangement.

[0080] The adjustable height of the hanging leg 322 allows the central connecting beam 32 to adapt to bridges with different wing plate 81 thicknesses, greatly improving the versatility of the bridge building machine. It can be applied to cantilever construction of bridges of various specifications without the need to customize special components for different wing plate 81 sizes, thus reducing the construction adaptation cost of the equipment.

[0081] Height adjustment can be achieved using bolt assemblies, which is simple and does not require modification of the core load-bearing structure. This can shorten the adaptation and adjustment time during on-site construction and improve work efficiency.

[0082] According to one embodiment of this application, such as Figure 1 As shown, the lifting mechanism 4 includes a hydraulic support assembly 41 and an anti-jacking wheel 42; wherein, the hydraulic support assembly 41 is used to abut against the lower surface of the wing plate 81 during casting to limit the forward tilting of the front end of the lower main truss assembly 2; the anti-jacking wheel 42 is used to abut against the lower surface of the wing plate 81 when the lower main truss assembly 2 travels to limit the forward tilting of the front end of the lower main truss assembly 2.

[0083] The lifting mechanism 4 integrates two functional components: a hydraulic support assembly 41 and a counter-jacking wheel 42. Both are installed at the rear end of the lower main truss assembly 2, and they work separately to adapt to the two core working conditions of pouring and traveling. During pouring, the hydraulic support assembly 41 works alone, extending and rigidly abutting against the lower surface of the wing plate 81 to provide stable vertical counter-support force. When the lower main truss assembly 2 travels, the hydraulic support assembly 41 retracts, and the counter-jacking wheel 42 abuts against the lower surface of the wing plate 81 alone, providing counter-support while adapting to the displacement requirements of traveling. The switching of their actions allows the lower main truss assembly 2 to be effectively constrained under different working conditions, forming a coordinated anti-tilting system with the anchoring device 71 at the rear end of the upper main truss assembly 1.

[0084] During pouring, the hydraulic support component 41 rigidly abuts against the wing plate 81, providing stable and continuous vertical counter-support force. This effectively restrains the forward tilting tendency of the lower main truss component 2. Combined with the anchoring device 71 of the main truss component 1, this creates a coordinated anti-tilting constraint between the upper and lower structures of the bridge-building machine, optimizing the overall force balance. During travel, the anti-tilting wheel 42 rolls against the wing plate 81, maintaining the anti-tilting constraint while converting sliding friction into rolling friction. This does not hinder the movement of the lower main truss component 2, ensuring smooth travel. The division of labor between the two components enhances the functional adaptability of the lifting mechanism 4, allowing for switching between working conditions without replacing components, thus shortening construction preparation time.

[0085] According to one embodiment of this application, such as Figure 2 , Figure 5 and Figure 6 As shown, the upper main truss assembly 1 includes two upper main truss units 11, which are arranged side by side along the transverse direction of the bridge; the lower main truss assembly 2 includes two lower main truss units 21, which are respectively arranged on both sides of the bridge.

[0086] The upper main truss assembly 1 consists of two upper main truss units 11, arranged side-by-side along the transverse direction above the bridge deck, forming a double main beam structure on the upper side that works together to bear loads. The lower main truss assembly 2 consists of two corresponding lower main truss units 21, arranged on both sides of the bridge deck below, corresponding to the transverse positions of the upper main truss units 11. The double-unit arrangement of the upper and lower main trusses forms a symmetrical double-load-bearing frame that fits the overall structural layout of the bridge. It also provides a symmetrical assembly and load-bearing foundation for components such as the front connecting beam 31 and the middle connecting beam 32, ensuring the uniformity of load transfer.

[0087] Two upper main truss units 11 are arranged parallel to each other along the transverse direction of the bridge, with the spacing adapted to the construction and operation space at the top of the bridge. The units are fixed together by multiple transverse connecting trusses to form an integrated upper main truss load-bearing frame. Two lower main truss units 21 are arranged below the wing plates 81 on both sides of the bridge, respectively, and are aligned vertically with the upper main truss units 11. The units are rigidly connected by bottom transverse connecting rods to ensure synchronization during travel and load-bearing.

[0088] Both the upper and lower main trusses adopt a symmetrical arrangement of two units, ensuring uniform load distribution along the transverse direction of the bridge and avoiding structural deformation caused by unilateral eccentric loading, thus significantly improving the overall load-bearing stability of the bridge-building machine. The frame structure formed by the two units, compared to a single main beam structure, allows for a smaller cross-sectional size of each unit under the same load, aligning with the lightweight design concept of the equipment. The vertical alignment of the upper and lower units allows for more direct stress on the connecting beams and suspension mechanisms, optimizing the overall load transfer path. The double lower main truss units 21 are positioned on both sides of the bridge, adapting to the structural layout of the wing plates 81, making it easier for the lifting mechanism 4 and the load-bearing switching mechanism 62 to provide support and constraint.

[0089] According to one embodiment of this application, such as Figure 1 and Figure 6 As shown, the upper and lower combined load-bearing cantilever bridge building machine also includes a rear connecting beam 33; the rear connecting beam 33 is fixedly installed at the rear end of the upper main truss assembly 1.

[0090] The rear connecting beam 33 is fixedly assembled to the rear end of the upper main truss assembly 1, rigidly connecting the two upper main truss units 11, so that the upper main truss assembly 1 forms an overall frame structure with an open front end and a closed rear end. The rear connecting beam 33 can provide a stable assembly foundation for the anchoring device 71, distribute the load of the anchoring device 71 to the two upper main truss units 11, avoid local stress concentration in a single unit, and at the same time strengthen the structural rigidity of the rear end of the upper main truss assembly 1, reduce structural deformation under the pouring condition, and adapt to the structural stability requirements of the bridge building machine under various working conditions.

[0091] The combined load-bearing cantilever bridge building machine provided in this application embodiment consists of an upper main truss assembly 1 and a lower main truss assembly 2 forming a combined load-bearing structure. Together, they bear various loads during the bridge manufacturing process, such as the pouring load, the self-weight of materials, and the weight of the bottom basket system 5. This significantly reduces the load borne by a single main truss assembly, thereby effectively reducing the structural dimensions of the upper main truss assembly 1 and the lower main truss assembly 2, while also reducing the overall self-weight and manufacturing cost of the bridge building machine.

[0092] With the structural dimensions of the lower main truss component 2 reduced, the area of ​​obstruction and coverage on the sides of the bridge is correspondingly reduced, which will not create a large area of ​​construction obstruction. This makes it easier for operators to repair the holes formed on the sides of the bridge during construction, thus improving the operational convenience of on-site construction.

[0093] The dimensions of the L-shaped bend in the front connecting beam 31 and the L-shaped bend 3212 in the middle connecting beam 32 can be significantly reduced in sync with the main truss assembly. For bridges with left and right spans, such as... Figure 9 As shown, the gap L1 between the left and right panels can easily accommodate this small-sized bent rod, that is, Figure 9 The dimension of L2 (i.e., the dimension of the curved rod along the transverse direction of the bridge) is less than half the dimension of L1, enabling the combined upper and lower load-bearing cantilever bridge-building machine of this application to be adapted to bridge manufacturing scenarios with small gaps between the left and right spans, thus broadening the applicable working conditions of the equipment. Figure 10 As shown, the combined upper and lower load-bearing cantilever bridge-building machine, after its size is reduced and its structural stress is optimized, can also be applied to the casting of multi-box bridges.

[0094] In existing bridge-building machines with a single main truss, to avoid excessive pressure damaging the bridge structure, the two sets of support points on the left and right sides of the bridge deck must be correspondingly set above the two webs 82 of the bridge, with the higher-strength webs 82 bearing the load of the bridge-building machine. However, the fixed positions and large spacing of the bridge webs 82 can easily lead to deformation in the middle of the front connecting beam 31 and the middle connecting beam 32. In this application, because the load-bearing capacity of the upper main truss assembly 1 is significantly reduced, its pressure on the bridge deck is significantly reduced. The support points do not need to be limited to above the bridge webs 82, and the spacing between the two sets of support points can be appropriately reduced, thereby optimizing the overall stress situation of the upper main truss assembly 1.

[0095] The upper main truss assembly 1 and the lower main truss assembly 2 can move forward independently. When the lower main truss assembly 2 has finished moving forward and the upper main truss assembly 1 has not yet moved forward, the upper part of the front end of the lower main truss assembly 2 forms an unobstructed open area. Without the obstruction of the main truss assembly or other structures, it can provide sufficient space for material hoisting and other auxiliary construction operations on site, facilitating various construction activities.

[0096] After the load on the lower main truss assembly 2 is effectively reduced, the counter-jacking force required when the rear lifting mechanism 4 abuts against the lower surface of the wing plate 81 is reduced accordingly. The abutting pressure of the lifting mechanism 4 against the lower surface of the wing plate 81 is reduced, which not only reduces the performance parameter requirements of the lifting mechanism 4, but also effectively avoids damage to the lower surface of the wing plate 81 due to excessive pressure. At the same time, it can also reduce the load pressure on the hanging leg 322 and prevent the hanging leg 322 from being structurally damaged due to excessive load.

[0097] The hanging leg 322 can flexibly adjust its vertical height position on the main body of the crossbeam 321, and can accurately adapt to bridge wing plates 81 of different thicknesses. There is no need to customize a special hanging leg 322 structure for different wing plates 81, which effectively improves the applicability of the bridge building machine.

[0098] The crossbeam rods of the front connecting crossbeam 31, the crossbeam rods 3211 of the middle connecting crossbeam 32, the rear connecting crossbeam 33, the two upper main truss units 11, and the two lower main truss units 21 can use standardized components with identical structure, shape, and size, which greatly reduces the types of components in the bridge building machine, facilitates production, processing, and parts management, and further reduces the production and manufacturing cost of the bridge building machine.

[0099] A bridge manufacturing method according to a second aspect of this application, such as Figure 11 As shown, the bridge manufacturing method is implemented using the aforementioned combined upper and lower load-bearing cantilever bridge-building machine, including: the first pouring at the initial position; the lower main truss assembly 2 and the bottom basket system 5 moving forward; the upper main truss assembly 1 moving forward; and the second pouring.

[0100] This bridge construction method relies on the modular structure of the combined upper and lower load-bearing cantilever bridge-building machine, employing a step-by-step, staged pouring process to complete the cantilever construction. First, the initial concrete pour is completed at the initial anchoring position of the bridge-building machine. After the poured section reaches the preset strength, the lower main truss assembly 2, along with the bottom basket system 5, is driven forward to the preset position. Then, the upper main truss assembly 1 is driven forward as a whole and its position is calibrated. Finally, the second pour is carried out, achieving the segmental forming of the bridge cantilever section and meeting the segmental advancement requirements of bridge cantilever construction.

[0101] It is easy to understand that before the upper main truss assembly 1 moves forward, it needs to wait for the concrete of the bridge section to reach the preset strength.

[0102] According to one embodiment of this application, before the upper main truss assembly 1 moves forward, the process further includes: performing material hoisting operations.

[0103] Material hoisting operations are added to the phased movement stage of bridge construction, precisely embedded in the timeframe between the completion of the lower main truss assembly 2's movement and the commencement of the upper main truss assembly 1's movement. At this point, the lower main truss assembly 2 is in place, while the upper main truss assembly 1 remains in its initial position and has not moved forward. An unobstructed open area is formed above the lower main truss assembly 2, providing ample operating space for the hoisting operation. After the hoisting operation is completed, the movement of the upper main truss assembly 1 commences, achieving a seamless connection between material preparation and equipment movement. This allows for advance material preparation for the subsequent second pouring and adapts to the progress requirements of cantilever construction.

[0104] According to one embodiment of this application, before the lower main truss assembly 2 and the bottom basket system 5 move forward, the method further includes: dismantling the third suspension mechanism 65 between the bottom basket system 5 and the bridge bottom; dismantling the first suspension mechanism 63 between the intermediate connecting beam 32 and the load-bearing switching mechanism 62; retracting the hydraulic support assembly 41 in the lifting mechanism 4 and causing the anti-jacking wheel 42 to abut against the lower surface of the wing plate 81; and retracting the support unit 612 in the supporting traveling mechanism 61, causing the traveling wheel 611 to contact the upper main truss assembly 1 for travel. After the lower main truss assembly 2 and the bottom basket system 5 move forward, the method further includes: installing the third suspension mechanism 65 located between the bottom basket system 5 and the bridge bottom.

[0105] This process involves the pre- and post-operational coordination of the lower main truss assembly 2 and the base basket system 5. Before movement, the load-bearing constraints of the pouring condition are released by dismantling the two types of suspension mechanisms. Simultaneously, the working conditions of the lifting mechanism 4 and the supporting traveling mechanism 61 are switched, allowing the bridge-building machine to transition from the pouring load-bearing state to the traveling state, thus avoiding component interference during movement. After movement is completed, the third suspension mechanism 65 is reinstalled, restoring the support connection between the base basket system 5 and the bottom of the bridge in advance, laying the foundation for subsequent processes and achieving an orderly transition between the traveling and pouring conditions.

[0106] According to one embodiment of this application, before the upper main truss assembly 1 moves forward, the method further includes: removing the anchoring device 71 at the rear end of the upper main truss assembly 1. After the upper main truss assembly 1 moves forward, the method further includes: installing the anchoring device 71 located at the rear end of the upper main truss assembly 1; installing the first suspension mechanism 63 located between the central connecting beam 32 and the load-bearing switching mechanism 62; the hydraulic support assembly 41 in the lifting mechanism 4 extending out and abutting against the lower surface of the wing plate 81, and separating the anti-jacking wheel 42 from the lower surface of the wing plate 81; the support unit 612 in the supporting traveling mechanism 61 extending out and supporting on the bridge deck, and separating the traveling wheel 611 from the upper main truss assembly 1.

[0107] This process involves the pre- and post-travel transition operations for the upper main truss assembly 1. Before travel, the anchoring device 71 is removed to release the positional constraints of the upper main truss assembly 1, ensuring uninterrupted travel. After travel, the anchoring device 71 is reinstalled to restore the anti-tilting constraints of the upper main truss assembly 1. Then, the first suspension mechanism 63 is reinstalled, and the jacking mechanism 4 and the supporting travel mechanism 61 are switched to the pouring bearing state, completing the full transition from travel to pouring and establishing a stable structural bearing foundation for the subsequent second pour.

[0108] According to one embodiment of this application, the lower main truss assembly 2 and the base basket system 5 move forward, including: the upper main truss assembly 1 remaining stationary, and a drive mechanism 72 driving the lower main truss assembly 2 forward to the second pouring position, such as... Figure 7 As shown.

[0109] This traveling step relies on the separate structures of the upper main truss assembly 1 and the lower main truss assembly 2. The upper main truss assembly 1 serves as a fixed load-bearing reference, and positioning is achieved by locking the traveling mechanism to maintain structural stability. The drive mechanism 72 outputs power to the central connecting beam 32, driving the lower main truss assembly 2 and the base basket system 5, which are fixed to it, to move forward synchronously and accurately reach the preset position for the second pour. During the traveling process, the front end of the lower main truss assembly 2 is constrained by the anti-top wheel 42 to tilt forward, ensuring smooth movement and adapting to the phased construction rhythm.

[0110] According to one embodiment of this application, the upper main truss assembly 1 is fixed, and the drive mechanism 72 drives the lower main truss assembly 2 to advance to the second pouring position, including: the front connecting beam 31 and the middle connecting beam 32 advance with the lower main truss assembly 2; the rear connecting beam 33 remains fixed with the upper main truss assembly 1.

[0111] The upper main truss assembly 1 remains stationary, while the drive mechanism 72 outputs power to propel the lower main truss assembly 2 towards the second pouring position. The front connecting beam 31 and the middle connecting beam 32, being rigidly connected to the lower main truss assembly 2, move forward synchronously with it. The rear connecting beam 33, being fixedly assembled with the upper main truss assembly 1, remains stationary. As the front connecting beam 31 and the middle connecting beam 32 move forward, they adapt to the upper main truss assembly 1. This coordinated movement ensures the consistency of the travel trajectory between the lower main truss assembly 2 and the base basket system 5. The stationary state of the rear connecting beam 33 further solidifies the fixed reference of the upper main truss assembly 1, adapting to the construction requirements of the split-type movement.

[0112] According to one embodiment of this application, the upper main truss assembly 1 moves forward, including: the lower main truss assembly 2 remaining stationary, and a drive mechanism 72 driving the upper main truss assembly 1 forward to the second pouring position, such as... Figure 8 As shown.

[0113] The lower main truss assembly 2 is kept stationary by a dedicated locking structure, serving as the reference for the movement of the upper main truss assembly 1. The drive mechanism 72 outputs power in the opposite direction to the upper main truss assembly 1, driving it forward to the second pouring position. The front connecting beam 31 and the middle connecting beam 32 can be in a rolling fit with the upper main truss assembly 1 to reduce friction; the rear connecting beam 33 is rigidly connected to the upper main truss assembly 1 and moves together with it.

[0114] When the upper main truss assembly 1 is fixed, the drive mechanism 72 can move the lower main truss assembly 2 forward; when the lower main truss assembly 2 is fixed, the drive mechanism 72 can move the upper main truss assembly 1 forward.

[0115] The following example illustrates the overall process of bridge manufacturing, such as Figure 12 As shown: First, the first pouring of concrete is carried out.

[0116] 2. Remove the third suspension mechanism 65 between the bottom basket system 5 and the bottom of the bridge, and remove the first suspension mechanism 63 between the connecting beam 32 and the load-bearing switching mechanism 62.

[0117] Third, the hydraulic support assembly 41 in the lifting mechanism 4 retracts, causing the anti-jacking wheel 42 to abut against the lower surface of the wing plate 81.

[0118] Fourth, the support unit 612 in the supporting traveling mechanism 61 retracts, so that the traveling wheel 611 contacts the upper main truss assembly 1 for travel.

[0119] 5. The upper main truss assembly 1 remains stationary, while the drive mechanism 72 drives the lower main truss assembly 2 forward to the second pouring position. The front connecting beam 31 and the middle connecting beam 32 move forward with the lower main truss assembly 2, while the rear connecting beam 33 remains stationary with the upper main truss assembly 1.

[0120] 6. Install the third suspension mechanism 65 located between the bottom basket system 5 and the bottom of the bridge.

[0121] 7. Carry out material hoisting operations.

[0122] 8. Remove the anchoring device 71 at the rear end of the upper main truss assembly 1.

[0123] 9. The support unit 612 in the supporting traveling mechanism 61 extends out and supports the bridge deck, so that the traveling wheel 611 is separated from the upper main truss assembly 1.

[0124] 10. The lower main truss assembly 2 remains stationary, while the drive mechanism 72 drives the upper main truss assembly 1 forward to the second pouring position.

[0125] 11. Install the first suspension mechanism 63 located between the middle connecting beam 32 and the load-bearing switching mechanism 62, and install the anchoring device 71 located at the rear end of the upper main truss assembly 1.

[0126] 12. The hydraulic support assembly 41 in the lifting mechanism 4 extends out and abuts against the lower surface of the wing plate 81, and separates the anti-jacking wheel 42 from the lower surface of the wing plate 81.

[0127] Thirteen, proceed with the second pouring.

[0128] By repeating the above steps, the bridge can be manufactured.

[0129] Finally, it should be noted that the above embodiments are only used to illustrate this application and are not intended to limit this application. Although this application has been described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications, or equivalent substitutions of the technical solutions of this application do not depart from the spirit and scope of the technical solutions of this application and should be covered within the scope of the claims of this application.

Claims

1. A combined upper and lower load-bearing cantilever bridge-building machine, characterized in that, include: The upper main truss assembly is located above the bridge deck; The lower main truss assembly is located below the bridge deck; The front connecting beam has its main body overlapping the upper main truss assembly, and its end extends around the wing plate of the bridge to the underside of the bridge deck and is fixedly connected to the front end of the lower main truss assembly. The front connecting beam is movable relative to the upper main truss assembly. The front connecting beam is used to bear part of the pouring load during the pouring process and to transfer the load to the upper main truss assembly and the lower main truss assembly respectively. The middle connecting beam is mainly installed on the upper main truss assembly, and its end extends around the wing plate of the bridge to connect with the lower main truss assembly at the middle position below the bridge deck, so as to support the lower main truss assembly when the lower main truss assembly travels relative to the upper main truss assembly; the middle connecting beam and the front connecting beam travel with the lower main truss assembly; A lifting mechanism is provided at the rear end of the lower main truss assembly to abut against the lower surface of the wing plate, thereby limiting the forward tilting of the front end of the lower main truss assembly; The bottom basket system is connected at the front end to the front connecting crossbeam or the upper main truss assembly, and at the rear end to the lower main truss assembly; The supporting traveling mechanism includes traveling wheels and a support unit installed below the central connecting beam; the traveling wheels are used to contact the upper main truss assembly to facilitate the travel of the upper main truss assembly or the lower main truss assembly; the support unit is used to support the central connecting beam on the bridge deck during casting, thereby separating the traveling wheels from the upper main truss assembly.

2. The upper and lower combined load-bearing cantilever bridge building machine according to claim 1, characterized in that, The connecting beam includes: The main body of the crossbeam is installed on the upper main truss assembly, and its end extends beyond the bridge deck by passing around the wing plate of the bridge. The hanging leg, fixed to the main body of the crossbeam and extending toward the main body of the bridge, is used to install the lower main truss assembly.

3. The upper and lower combined load-bearing cantilever bridge building machine according to claim 2, characterized in that, Also includes: The load-bearing switching mechanism is installed on the hanging leg and connected to the lower main truss assembly; The first hanging mechanism is fixed at its upper end to the middle connecting beam and at its lower end to the load-bearing switching mechanism. During the pouring process, the first hanging mechanism lifts the load-bearing switching mechanism so that the hanging leg does not bear the weight of the lower main truss assembly. The first hanging mechanism is removed before the upper main truss assembly or the lower main truss assembly moves.

4. The upper and lower combined load-bearing cantilever bridge building machine according to claim 3, characterized in that, The load switching mechanism includes: A through-hole is inserted into the hanging leg, and a support portion is formed at the upper end to prevent the through-hole from falling out; the through-hole can slide up and down in the through-hole, and when the support portion abuts against the hanging leg, the hanging leg bears the weight of the lower main truss assembly; the through-hole is connected to the lower end of the first suspension mechanism. The first fastener securely connects the lower end of the through-hole component to the lower main truss assembly. or The load switching mechanism includes: The hanging component is provided with a through hole, and the end of the hanging leg passes through the through hole; the height of the through hole is greater than the thickness of the end of the hanging leg, so that when the hanging component is attached to the end of the hanging leg, the hanging leg bears the weight of the lower main truss assembly. The second fastener securely connects the lower end of the hanging component to the lower main truss assembly.

5. The upper and lower combined load-bearing cantilever bridge building machine according to claim 1, characterized in that, Also includes: An anchoring device is installed at the rear end of the upper main truss assembly to anchor the rear end of the upper main truss assembly to the bridge during pouring, thereby limiting the forward tilting of the front end of the upper main truss assembly.

6. The upper and lower combined load-bearing cantilever bridge building machine according to claim 1, characterized in that, Also includes: A traveling mechanism is installed on the lower surface of the upper main truss assembly and contacts the bridge deck to enable the upper main truss assembly to move relative to the bridge deck; A drive mechanism is mounted on the upper main truss assembly, and its output end is connected to the middle connecting beam to drive the middle connecting beam and the lower main truss assembly to move relative to the upper main truss assembly.

7. The upper and lower combined load-bearing cantilever bridge building machine according to claim 2, characterized in that, The front connecting beam has the same structure as the middle connecting beam.

8. The upper and lower combined load-bearing cantilever bridge building machine according to claim 1, characterized in that, Also includes: The second suspension mechanism is connected at its upper end to the middle position of the lower main truss assembly and at its lower end to the rear end of the bottom basket system. The third suspension mechanism is connected at its upper end to the bottom of the bridge and at its lower end to the rear end of the basket system; and is removed before the lower main truss assembly travels. The fourth hanging mechanism is connected at its upper end to the front connecting beam and at its lower end to the front end of the bottom basket system. The fifth suspension mechanism is connected at its upper end to the front end of the lower main truss assembly and at its lower end to the front end of the bottom basket system.

9. The upper and lower combined load-bearing cantilever bridge building machine according to claim 2, characterized in that, The height of the hanging leg fixed on the main body of the crossbeam is adjustable.

10. The upper and lower combined load-bearing cantilever bridge building machine according to claim 1, characterized in that, The lifting mechanism includes: A hydraulic support assembly is used to hold the lower surface of the wing plate against the pouring process to limit the forward tilting of the front end of the lower main girder assembly. An anti-top wheel is used to abut against the lower surface of the wing plate when the lower main truss assembly travels, thereby limiting the forward tilting of the front end of the lower main truss assembly.

11. The upper and lower combined load-bearing cantilever bridge building machine according to claim 1, characterized in that, The upper main girder assembly includes two upper main girder units, which are arranged side by side along the transverse bridge direction; The lower main girder assembly includes two lower main girder units, which are respectively arranged on both sides of the bridge.

12. The upper and lower combined load-bearing cantilever bridge building machine according to claim 1, characterized in that, Also includes: The rear connecting beam is fixedly installed at the rear end of the upper main truss assembly.

13. A bridge manufacturing method, characterized in that, Using the upper and lower combined load-bearing cantilever bridge building machine as described in any one of claims 1 to 12, comprising: The first pour is made at the initial position; The lower main truss assembly and the base basket system move forward; The upper main truss assembly moves forward; The second pouring is then carried out.

14. The bridge manufacturing method according to claim 13, characterized in that, Before the upper main truss assembly moves forward, it also includes: Material hoisting operations are being carried out.

15. The bridge manufacturing method according to claim 13, characterized in that, Before the lower main truss assembly and the basket system move forward, the following are also included: Remove the third suspension mechanism between the basket system and the bottom of the bridge; The first suspension mechanism connecting the crossbeam and the load-bearing switching mechanism during dismantling; The hydraulic support assembly in the lifting mechanism retracts, causing the anti-jacking wheel to press against the lower surface of the wing plate; The support unit in the supporting traveling mechanism retracts, allowing the traveling wheels to contact the upper main truss assembly for travel; After the lower main truss assembly and the basket system have moved forward, the system further includes: Install a third suspension mechanism located between the basket system and the bottom of the bridge.

16. The bridge manufacturing method according to claim 13, characterized in that, Before the upper main truss assembly moves forward, it also includes: Remove the anchoring device at the rear end of the upper main truss assembly; The support unit in the supporting traveling mechanism extends and supports the bridge deck, and separates the traveling wheels from the upper main truss assembly; After the upper main truss assembly has traveled forward, the following is also included: Install anchoring devices located at the rear end of the upper main truss assembly; Install the first suspension mechanism located between the central connecting beam and the load switching mechanism; The hydraulic support assembly in the lifting mechanism extends and abuts against the lower surface of the wing plate, separating the anti-jacking wheel from the lower surface of the wing plate.

17. The bridge manufacturing method according to claim 13, characterized in that, The lower main truss assembly and the basket system move forward, including: The upper main truss assembly remains stationary, while the drive mechanism propels the lower main truss assembly forward to the second pouring position.

18. The bridge manufacturing method according to claim 17, characterized in that, The upper main truss assembly remains stationary, while the drive mechanism drives the lower main truss assembly forward to the second pouring position, including: The front and middle connecting beams advance with the lower main truss assembly; the rear connecting beam remains stationary with the upper main truss assembly.

19. The bridge manufacturing method according to claim 13, characterized in that, The upper main truss assembly moves forward, including: The lower main truss assembly remains stationary, while the drive mechanism propels the upper main truss assembly forward to the second pouring position.

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