Bridge builder main truss system and bridge builder

Abstract

The application relates to the field of bridge pouring, and provides a main truss system of a bridge builder and the bridge builder. The main truss system of the bridge builder comprises a main truss frame, a vertical reinforcing rod, a lower end of the vertical reinforcing rod being installed on the main truss frame, the vertical reinforcing rod being obliquely arranged, and an upper end of the vertical reinforcing rod being obliquely extended towards a rear end of the main truss frame, and a tension assembly used for connecting the upper end of the vertical reinforcing rod and an end position of the main truss frame. The main truss system of the bridge builder provided by the application can effectively solve the problem that the front end of the main truss system in the prior art is subjected to excessive force and is deformed, and the force bearing condition of the main truss system is optimized.

Description

Technical Field

[0001] This application relates to the field of bridge construction, and more particularly to a main truss system and a bridge building machine. Background Technology

[0002] In current bridge-building machines, the front end of the main truss system bears a significant load, supporting the weight of the side formwork system and the bottom basket system. To prevent the main truss system from tipping forward, a large downward pressure is applied to its rear end (e.g., by suspending counterweights or anchoring). However, this can cause significant deformation at the front end of the main truss system. Currently, steel wire ropes can be used to pull the front end of the main truss system, which can mitigate this downward deformation to some extent. However, the current steel wire ropes have limited effectiveness in preventing deformation at the front end of the main truss system and cannot achieve the desired results. Utility Model Content

[0003] This application provides a main truss system for a bridge-building machine to solve the problems of excessive stress and deformation at the front end of the main truss system in the prior art, and to optimize the stress condition of the main truss system.

[0004] This application also provides a bridge-building machine.

[0005] According to a first aspect of this application, a main truss system for a bridge-building machine includes: Main truss frame; A vertical reinforcing bar is installed at its lower end on the main truss frame; the vertical reinforcing bar is inclined so that its upper end extends inclinedly toward the rear end of the main truss frame. A tension assembly for connecting the upper end of the vertical stiffener to at least the front end of the main truss frame.

[0006] According to one embodiment of this application, the main truss frame includes a main rod assembly extending along the length direction of the beam body, and a crossbeam assembly extending perpendicular to the length direction of the main rod assembly. The crossbeam assembly includes a first crossbeam and a second crossbeam spaced apart. The first crossbeam is located at the front end of the main truss frame, and the second crossbeam is located at the rear end of the main truss frame. The lower end of the vertical stiffener is connected to the main member assembly and is located between the first crossbeam and the second crossbeam; or, The crossbeam assembly includes a first crossbeam, a second crossbeam, and a third crossbeam spaced apart. The first crossbeam is located at the front end of the main truss frame, the second crossbeam is located at the rear end of the main truss frame, and the third crossbeam is located between the first crossbeam and the second crossbeam. The lower end of the vertical reinforcing rod is connected to the third crossbeam or the main rod assembly.

[0007] According to one embodiment of this application, along the length of the main truss frame, the lower end of the vertical stiffener is installed between the midpoint and the rear end of the main truss frame.

[0008] According to one embodiment of this application, the extension of the centerline of the vertical stiffener passes through the front support point of the main truss frame; The main truss system also includes a front traveling device, which supports the main truss frame on the upper surface of the beam, and the connection position between the main truss frame and the front traveling device forms the front support point.

[0009] According to one embodiment of this application, the tension component includes: The first tie member has one end connected to the upper end of the vertical reinforcing rod and the other end connected to the front end of the main truss frame; The second tie member is connected at one end to the upper end of the vertical reinforcing rod and at the other end to the rear end of the main truss frame.

[0010] According to one embodiment of this application, the extension line of the second tie member passes through the rear support point of the main truss frame; The main truss system also includes a rear traveling device. The front traveling device and the rear traveling device support the main truss frame on the upper surface of the beam. The connection position between the main truss frame and the rear traveling device forms the rear support point.

[0011] According to one embodiment of this application, the main rod assembly includes an upper main rod and a lower main rod connected together; When the lower end of the vertical reinforcing rod is connected to the main rod assembly, the lower end of the vertical reinforcing rod is connected to the lower main rod.

[0012] According to one embodiment of this application, the upper end face of the lower main rod includes an abutting surface, a transition slope, and a mounting surface. The abutting surface is connected to the mounting surface through the transition slope, such that the height of the mounting surface is lower than that of the abutting surface. The mounting surface is used to mount the crossbeam assembly, and the abutment surface is used to connect with the upper main rod.

[0013] According to one embodiment of this application, the upper end face of the upper main rod includes a free end face and inclined surfaces located at the front and rear ends of the free end face.

[0014] A bridge-building machine according to a second aspect of this application includes the aforementioned main truss system of the bridge-building machine.

[0015] The above-described one or more technical solutions in the embodiments of this application have at least one of the following technical effects: In the main truss system of the bridge-building machine of this application, the lower end of the vertical stiffener is installed on the main truss frame and is inclined with the upper end extending towards the rear end of the main truss frame. This structural design breaks through the limitation of traditional stiffeners being mostly arranged vertically or horizontally, and can form a more reasonable force transmission path with the tension component: when the front end of the main truss frame bears the weight of the side formwork system, the bottom basket system, etc. and has a downward deformation tendency, the tension component connects the upper end of the vertical stiffener to the front end of the main truss frame. The inclined vertical stiffener can disperse and transmit the tension applied by the tension component towards the rear end of the main truss frame, avoiding the tension from being concentrated in the local area of ​​the front end, thereby improving the constraint effect of the tension component on the front end of the main truss system, alleviating the problem of excessive force on the front end of the main truss system, and reducing the degree of downward deformation of the front end.

[0016] 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

[0017] 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.

[0018] Figure 1 This is a structural schematic diagram of the main truss system provided in this application. Figure 1 (Front view; the beam assembly includes a first beam and a second beam).

[0019] Figure 2 This is a structural schematic diagram of the main truss system provided in this application. Figure 2 (3D view; the crossbeam assembly includes a first crossbeam and a second crossbeam).

[0020] Figure 3 This is a structural schematic diagram of the main truss system provided in this application. Figure 3 (3D view; the beam assembly includes a first beam and a second beam; the first beam or the second beam can be a rod structure).

[0021] Figure 4 This is a structural schematic diagram of the main truss system provided in this application. Figure 4 (Front view; the crossbeam assembly includes a first crossbeam, a second crossbeam, and a third crossbeam).

[0022] Figure 5 This is a structural schematic diagram of the main truss frame provided in this application. Figure 1 (The crossbeam assembly includes a first crossbeam and a second crossbeam.)

[0023] Figure 6 This is a structural schematic diagram of the main truss frame provided in this application. Figure 2 (The crossbeam assembly includes a first crossbeam, a second crossbeam, and a third crossbeam.)

[0024] Figure 7 This is a structural schematic diagram of the main truss frame provided in this application. Figure 3 (The upper end face of the lower main rod includes the abutment surface, the transition slope and the mounting surface; the crossbeam assembly includes the first crossbeam and the second crossbeam).

[0025] Figure 8 This is a structural schematic diagram of the main truss frame provided in this application. Figure 4 (The upper end face of the lower main rod includes the abutment surface, the transition slope and the mounting surface; the crossbeam assembly includes the first crossbeam, the second crossbeam and the third crossbeam).

[0026] Figure 9 This is a structural schematic diagram of the main truss frame provided in this application. Figure 5 (3D view; the upper end face of the lower main rod includes the abutment surface, transition slope, and mounting surface).

[0027] Figure 10 This is a structural schematic diagram of the main truss frame provided in this application. Figure 6 (The upper end face of the upper main rod includes a free end face and an inclined surface; the crossbeam assembly includes a first crossbeam and a second crossbeam).

[0028] Figure 11 This is a structural schematic diagram of the main truss frame provided in this application. Figure 7 (The upper end face of the upper main bar includes a free end face and an inclined surface; the crossbeam assembly includes a first crossbeam, a second crossbeam and a third crossbeam).

[0029] Figure label: 1. Main truss frame; 11. Main rod assembly; 111. Upper main rod; 1111. Free end face; 1112. Inclined surface; 112. Lower main rod; 1121. Abutment surface; 1122. Transition inclined surface; 1123. Mounting surface; 1124. Mounting hole; 12. Crossbeam assembly; 121. First crossbeam; 122. Second crossbeam; 123. Third crossbeam; 2. Vertical stiffener; 21. Vertical rod body; 22. Top seat; 3. Tension assembly; 31. First tie member; 32. Second tie member; 41. Front support point; 42. Rear support point. Detailed Implementation

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] like Figure 1As shown, according to an embodiment of the first aspect of this application, a main truss system for a bridge-building machine includes: a main truss frame 1; a vertical reinforcing rod 2, the lower end of which is mounted on the main truss frame 1; the vertical reinforcing rod 2 is inclined such that the upper end of the vertical reinforcing rod 2 extends inclinedly toward the rear end of the main truss frame 1; a tension assembly 3 has a first end connected to the vertical reinforcing rod 2 and a second end connected to the front end of the main truss frame 1 (e.g., when the tension assembly 3 includes a tension rope, the first end of the tension rope is connected to the vertical reinforcing rod 2 and the second end is connected to the front end of the main truss frame 1); of course, the second end of the tension assembly 3 can also be connected to both the front end and the rear end of the main truss frame 1 simultaneously (e.g., when the tension assembly 3 includes two tension ropes, the first end of the first tension rope is connected to the vertical reinforcing rod 2 and the second end is connected to the front end of the main truss frame 1; the first end of the second tension rope is connected to the vertical reinforcing rod 2 and the second end is connected to the rear end of the main truss frame 1).

[0036] In the main truss system of the bridge-building machine, the main truss frame 1 serves as the core load-bearing foundation, providing a stable mounting platform for the vertical stiffeners 2 and the tension assembly 3, ensuring the foundation's load-bearing capacity. The lower end of the vertical stiffener 2 is installed on the main truss frame 1, and it is angled with its upper end extending towards the rear end of the main truss frame 1. This structural design breaks through the limitations of traditional stiffeners, which are mostly arranged vertically or horizontally, and can form a more reasonable force transmission path with the tension assembly 3. When the front end of the main truss frame 1 bears the weight of the side formwork system, the bottom basket system, etc., and tends to deform downwards, the tension assembly 3 connects the upper end of the vertical stiffener 2 to the front end of the main truss frame 1. The angled vertical stiffener 2 can disperse and transmit the tension applied by the tension assembly 3 towards the rear end of the main truss frame 1, avoiding the concentration of tension in a localized area at the front end. This improves the constraint effect of the tension assembly 3 on the front end of the main truss system, alleviates the problem of excessive stress at the front end of the main truss system, and reduces the degree of downward deformation at the front end.

[0037] The vertical stiffener 2 extends at an angle towards the rear end of the main truss frame 1, enabling it to withstand greater tensile forces and preventing it from tilting forward or breaking when pulling the front end of the main truss frame 1. This angled extension of the vertical stiffener 2 towards the rear end of the main truss frame 1 ensures that its own force direction aligns more closely with the tensile force transmitted by the tension component 3, effectively dispersing the tensile force and enhancing its tensile load-bearing capacity. Compared to vertically positioned or forward-tilting stiffeners, this angled direction reduces lateral forces caused by deviations in the force direction, preventing forward tilting during the pulling process of the main truss frame 1. Furthermore, the reasonable angle of inclination ensures a more uniform stress distribution within the vertical stiffener 2, preventing breakage due to localized stress concentration, guaranteeing the structural stability of the vertical stiffener 2 under long-term stress, further extending the overall service life of the main truss system, and reducing the risk of construction interruptions due to stiffener damage.

[0038] By tilting the vertical stiffener 2, the force of the tension component 3 can form a collaborative load-bearing system with the main truss frame 1 through the stiffener, rather than relying solely on the tension of the tension component 3, further enhancing the deformation resistance of the front end of the main truss system. Simultaneously, this structure balances the force relationship between the front-end load and the rear-end downforce (such as the pressure generated by hanging counterweights and anchoring), reducing the possibility of increased front-end deformation due to rear-end downforce, ensuring the structural stability of the main truss system during construction, and providing support for the precision control and safe implementation of bridge construction. The tilting of the vertical stiffener 2 also enhances the overall rigidity of the main truss frame 1, reduces the overall deformation of the main truss frame 1 in the length direction, and improves the adaptability of the main truss system to complex construction loads.

[0039] like Figure 4 As shown, according to one embodiment of this application, the main truss frame 1 includes a main rod assembly 11 extending along the length direction of the beam body, and a crossbeam assembly 12 extending along the length direction perpendicular to the main rod assembly 11; the crossbeam assembly 12 includes a first crossbeam 121 and a second crossbeam 122 spaced apart, the first crossbeam 121 being located at the front end of the main truss frame 1, the second crossbeam 122 being located at the rear end of the main truss frame 1, and the lower end of the vertical reinforcing rod 2 being connected to the main rod assembly 11 and located between the first crossbeam 121 and the second crossbeam 122; or, the crossbeam assembly 12 includes a first crossbeam 121, a second crossbeam 122 and a third crossbeam 123 spaced apart, the first crossbeam 121 being located at the front end of the main truss frame 1, the second crossbeam 122 being located at the rear end of the main truss frame 1, the third crossbeam 123 being located between the first crossbeam 121 and the second crossbeam 122, and the lower end of the vertical reinforcing rod 2 being connected to the third crossbeam 123 or the main rod assembly 11.

[0040] The lower surface of the vertical reinforcing rod 2 can be connected to the upper surface of the main rod assembly 11 by means of bolts, pins, etc.; or, the lower end of the vertical reinforcing rod 2 can also extend into the main rod assembly 11 and be fixed to the web of the main rod assembly 11, such as... Figure 2 As shown, in the main truss frame 1, the main member assembly 11 extends along the length of the beam, and the crossbeam assembly 12 extends perpendicular to the length of the main member assembly 11. Together, they form a stable frame structure, providing a basic load-bearing skeleton for the entire main truss system and improving the overall rigidity of the main truss frame 1. Specifically, the first crossbeam 121 is located at the front end of the main truss frame 1, and the second crossbeam 122 is located at the rear end. Their spacing provides two-point support along the length of the main truss frame 1, balancing the stress distribution at the front and rear ends and reducing the tendency for localized subsidence at the front end due to the weight of the side formwork system and the bottom basket system.

[0041] like Figure 1As shown, when the lower end of the vertical reinforcing rod 2 is connected to the main rod assembly 11 and located between the first crossbeam 121 and the second crossbeam 122, the main rod assembly 11 can distribute the tensile force transmitted by the vertical reinforcing rod 2 along the length direction to the main rod assembly 11 and the crossbeam assembly 12, avoiding the tensile force from being concentrated in a certain local area of ​​the main rod assembly 11, and reducing the risk of damage to the main rod assembly 11 due to excessive local stress; at the same time, the connection position is located in the middle area (slightly rearward) of the main truss frame 1, which allows the vertical reinforcing rod 2 and the tension assembly 3 to form a more reasonable lever arm angle, further optimizing the tensile force transmission path, enhancing the constraint effect on the front end of the main truss frame 1, and alleviating front end deformation.

[0042] like Figure 4 As shown, when a third crossbeam 123 is added to the crossbeam assembly 12 between the first crossbeam 121 and the second crossbeam 122, and the lower end of the vertical reinforcing rod 2 is connected to the third crossbeam 123, the third crossbeam 123 can directly provide support for the vertical reinforcing rod 2. This allows the force transmitted by the vertical reinforcing rod 2 to be distributed to the crossbeam assembly 12 via the third crossbeam 123, and then transmitted from the crossbeam assembly 12 to the main frame assembly 11. The third crossbeam 123 adds a stress-bearing support point in the middle area of ​​the main truss frame 1, further enhancing the overall deformation resistance of the main truss frame 1. This is particularly suitable for scenarios where the main truss frame 1 is long or has a large front-end load, avoiding insufficient stiffness in the middle area due to the large span of the main truss frame 1. Of course, when the third crossbeam 123 is added to the crossbeam assembly 12 between the first crossbeam 121 and the second crossbeam 122, the vertical reinforcing rod 2 can still be directly mounted on the main frame assembly 11.

[0043] The connection methods of the two vertical stiffeners 2 can be flexibly selected according to the actual construction needs of the main truss system, enhancing the adaptability of the structural design, enabling the main truss system to match different bridge construction conditions, and improving the practicality of the device.

[0044] like Figure 1 As shown, according to one embodiment of this application, along the length direction of the main truss frame 1, the lower end of the vertical reinforcing rod 2 is installed between the midpoint and the rear end of the main truss frame 1.

[0045] During bridge construction, the main truss frame 1 needs to bear the weight load of the front side formwork system and the bottom basket system, while the rear end needs to be subjected to downward pressure to prevent it from overturning. This difference in force between the front and rear ends can easily cause downward deformation at the front end. Installing the lower end of the vertical stiffener 2 between the midpoint of the main truss frame 1 and the rear end can create a better force transmission path between the vertical stiffener 2 and the tension component 3 connecting its upper end and the front end of the main truss frame 1, and disperse the downward deformation tendency at the front end through a reasonable lever arm length.

[0046] like Figure 1As shown, according to one embodiment of this application, the extension line of the centerline of the vertical stiffener 2 passes through the front support point 41 of the main truss frame 1; the main truss system also includes a front traveling device, which supports the main truss frame 1 on the upper surface of the beam, and the connection position between the main truss frame 1 and the front traveling device forms the front support point 41. The fact that the extension line of the centerline of the vertical stiffener 2 passes through the front support point 41 of the main truss frame 1 defines the lower end installation position and tilt angle of the vertical stiffener 2.

[0047] The front traveling device, as a connecting support component between the main truss frame 1 and the upper surface of the beam, forms the front support point 41 at its connection with the main truss frame 1. This front support point is a crucial node for the transfer of force from the main truss frame 1 to the beam. By setting the extension line of the centerline of the vertical stiffener 2 to pass through the front support point 41, the tensile force borne by the vertical stiffener 2 can be accurately transferred to the front support point 41 along its own centerline, forming a direct force transmission path of "vertical stiffener 2 - front support point 41 - front traveling device - beam". This avoids lateral force components caused by path deviation during the transmission of tensile force, reduces force loss, and also reduces the risk of forward tilting and local stress concentration in the vertical stiffener 2 due to deviation in the direction of force.

[0048] The vertical stiffener 2 is connected to the front end of the main truss frame 1 via the tension assembly 3. Its tension must effectively counteract the downward deformation tendency of the front end caused by bearing the weight of the side formwork system and the bottom basket system. The design of the centerline extension line passing through the front support point 41 allows the tension to act on the front support point 41 at the optimal angle, so that the supporting reaction force of the front support point 41 on the main truss frame 1 and the tension of the vertical stiffener 2 work together to further enhance the constraint effect on the front end deformation and avoid insufficient front end constraint due to the dispersion of tension.

[0049] Meanwhile, this design is compatible with the overall stress balance of the main truss frame 1. The rear end of the main truss frame 1 requires downward pressure to prevent it from overturning, while the front end is subjected to downward loads. The front support point 41, acting as a transition node between the front and rear ends, receives the tension from the vertical stiffener 2 and can quickly transfer the force to the beam through the front traveling device, without adding extra load to the main truss frame 1 itself, thus preventing local overload due to the superposition of forces at the front and rear ends. The supporting function of the front traveling device and the tension transfer function of the vertical stiffener 2 are linked through the front support point 41, enabling the main truss system to maintain stable support and efficiently control front-end deformation during construction, providing dual protection for the accuracy and safety of bridge construction.

[0050] like Figure 1As shown, according to one embodiment of this application, the tension assembly 3 includes: a first tie member 31, one end of which is connected to the upper end of the vertical reinforcing rod 2, and the other end of which is connected to the front end of the main truss frame 1; and a second tie member 32, one end of which is connected to the upper end of the vertical reinforcing rod 2, and the other end of which is connected to the rear end of the main truss frame 1. The tension assembly 3 can connect both the front and rear ends of the main truss frame 1 simultaneously (i.e., both the first tie member 31 and the second tie member 32 are provided), or it can connect only the front end of the main truss frame 1 (i.e., only the first tie member 31 is provided).

[0051] The first connecting member 31 and the second connecting member 32 can specifically take the form of cables, rods, or slings, etc. Figure 2 and Figure 3 As shown.

[0052] A connecting seat can be fixedly installed on the main rod assembly 11 for connection with the first tie member 31, and the same applies to the second tie member 32. The specific connection structure at the end of the first tie member 31 can be set with reference to the connection method of wire rope in the prior art, and will not be described in detail here.

[0053] The front end of the main truss frame 1 is prone to downward deformation due to the weight of the side formwork system and the bottom basket system, while the rear end requires downward pressure to prevent it from tipping forward. This stress state can easily lead to an imbalance in the stress on the vertical stiffener 2 itself. The coordinated arrangement of the first tie member 31 and the second tie member 32 in the tension assembly 3 can regulate the stress on the vertical stiffener 2 in both directions: the first tie member 31 is connected to the upper end of the vertical stiffener 2 at one end and to the front end of the main truss frame 1 at the other end, directly generating an upward pulling force on the front end of the main truss frame 1, accurately counteracting the downward deformation trend at the front end. The second tie member 32 is connected to the upper end of the vertical stiffener 2 at one end and to the rear end of the main truss frame 1 at the other end, generating a backward pulling force on the vertical stiffener 2, balancing the forward force generated by the first tie member 31 on the vertical stiffener 2, avoiding the risk of the vertical stiffener 2 tilting forward, local stress concentration, or even breakage due to excessive unidirectional stress, and ensuring the structural stability of the vertical stiffener 2.

[0054] The double tie rods allow the force transmitted by the vertical stiffener 2 to be distributed more evenly to the front and rear ends of the main truss frame 1: the first tie rod 31 directly alleviates the deformation caused by the front load; the second tie rod 32 works in a moderate synergy with the downward pressure at the rear end to prevent overturning, so as not to increase the load on the rear end due to excessive tension, and to further distribute the force on the vertical stiffener 2 through the structural bearing capacity of the rear end, thereby avoiding overload in local areas of the main truss frame 1 due to the superposition of forces, thus balancing the force state at the front and rear ends and reducing the possibility of overall deformation of the main truss frame 1.

[0055] Meanwhile, the double-rope structure and the inclined arrangement of the vertical reinforcing rod 2 form a highly efficient force transmission system. The upper end of the vertical reinforcing rod 2 is inclined towards the rear end of the main truss frame 1, and the extension of its center line points precisely to the front support point 41. The first tie member 31 and the second tie member 32 connect the front and rear ends respectively, which allows the tension of the vertical reinforcing rod 2 to be quickly transmitted to the key stress nodes of the main truss frame 1 along the inclined direction through the double ropes. This solves the problem of the limited anti-deformation effect of the single tension component 3 in the prior art, and provides support for the stability and accuracy of the main truss system during bridge construction.

[0056] According to one embodiment of this application, the extension line of the second tie member 32 passes through the rear support point 42 (not shown in the figure) of the main truss frame 1; the main truss system also includes a rear traveling device, and the front traveling device and the rear traveling device support the main truss frame 1 on the upper surface of the beam. The connection position between the main truss frame 1 and the rear traveling device forms the rear support point 42. The main truss frame 1 is supported on the beam and travels through the "front traveling device + rear traveling device". The positions of the front support point 41 and the rear support point 42 are fixed.

[0057] The rear traveling device and the front traveling device together constitute the support system of the main truss frame 1. The rear support point 42 formed by the connection between the rear traveling device and the main truss frame 1 is the core node for transmitting the force (such as the downward pressure to prevent overturning) at the rear end of the main truss frame 1 to the beam. By setting the extension line of the second tie member 32 to pass through the rear support point 42, the tensile force borne by the second tie member 32 can be accurately transmitted to the rear support point 42 along its own extension line, forming a direct force transmission path of "second tie member 32 - rear support point 42 - rear traveling device - beam". This avoids the lateral component of the tensile force due to the deviation of the force transmission path, and at the same time reduces the risk of local stress concentration at the connection position between the second tie member 32 and the vertical stiffener 2 due to the deviation of the force direction.

[0058] The second tie member 32 connects the upper end of the vertical stiffener 2 to the rear end of the main truss frame 1. Its tension needs to balance the forward force exerted on the vertical stiffener 2 by the first tie member 31 (connecting the upper end of the vertical stiffener 2 to the front end of the main truss frame 1). The design of the extension line passing through the rear support point 42 allows the tension of the second tie member 32 to act on the rear support point 42 at the optimal angle, so that the supporting reaction force of the rear support point 42 on the main truss frame 1 and the tension of the second tie member 32 work together to further enhance the stability constraint effect on the vertical stiffener 2.

[0059] Meanwhile, this design is highly compatible with the anti-tipping requirement at the rear end of the main truss frame 1. The rear end of the main truss frame 1 needs to be subjected to downward pressure (such as the pressure generated by hanging counterweights and anchoring) to prevent it from tipping forward. The rear support point 42 is the main bearing node of this downward pressure. After the tension of the second tie member 32 is transmitted to the rear support point 42, it can form a reasonable force superposition with the rear downward pressure. This means that the second tie member 32 provides a stable rearward tension for the vertical stiffener 2, and the superimposed force is quickly transmitted to the beam body with the help of the rear traveling device, without adding extra load to the main truss frame 1 itself.

[0060] The front and rear traveling devices are linked with the tension component 3 through the front support point 41 and the rear support point 42, respectively, so that the main truss system can maintain stable support during construction and efficiently control the front deformation through the bidirectional tension component 3, providing dual protection for the accuracy and safety of bridge construction.

[0061] According to one embodiment of this application, such as Figure 1 As shown, the vertical reinforcing rod 2 includes a vertical rod body 21 and a top seat 22. The lower end of the vertical rod body 21 is installed on the main truss frame 1, and the top seat 22 is installed at the top of the vertical rod body 21. The top seat 22 is used to connect with the first tie member 31 and the second tie member 32.

[0062] The vertical rod body 21, as the core load-bearing component of the vertical stiffener 2, is installed at its lower end on the main truss frame 1. It can provide a stable support foundation for the entire vertical stiffener 2, ensuring that the vertical stiffener 2 has sufficient rigidity to resist deformation when subjected to bidirectional tension from the first tie member 31 and the second tie member 32, avoiding forward tilting or bending due to insufficient rigidity, and providing a reliable structural carrier for the transmission of tension.

[0063] The top seat 22 allows the tension of the first tie member 31 and the second tie member 32 to be transmitted more evenly to the vertical member body 21. The two ropes connect the front and rear ends of the main truss frame 1 respectively, and their tension directions differ. The top seat 22 can act as a "transfer node" for the tension, integrating the bidirectional tension and transmitting it along the axis of the vertical member body 21 to the main truss frame 1. Simultaneously, this split structure of "vertical member body 21 bearing the load + top seat 22 connecting" reduces the processing difficulty of the vertical reinforcing rod 2.

[0064] The structure of the vertical stiffener 2 also enhances the flexibility of construction and maintenance. When it is necessary to replace or adjust the first tie member 31 or the second tie member 32, only the connection part of the top seat 22 needs to be operated, without disassembling the entire vertical rod body 21, reducing construction procedures. If the top seat 22 is worn, the seat can be replaced separately without discarding the entire vertical stiffener 2, reducing maintenance costs. The structure of the vertical stiffener 2 is highly compatible with the overall stress requirements of the main truss system, ensuring the load-bearing capacity of the vertical stiffener 2 against bidirectional tension, and optimizing connection and maintenance efficiency through a split structure, providing support for the stable functioning of the tension component 3.

[0065] Of course, the top seat 22 may be omitted, and connecting components such as lugs may be provided only at the top of the vertical rod body 21 to fix the first tie member 31 and the second tie member 32.

[0066] like Figure 5 As shown, according to one embodiment of this application, the main rod assembly 11 includes an upper main rod 111 and a lower main rod 112 connected together; when the lower end of the vertical reinforcing rod 2 is connected to the main rod assembly 11, the lower end of the vertical reinforcing rod 2 is connected to the lower main rod 112.

[0067] The main rod assembly 11 is formed by connecting an upper main rod 111 and a lower main rod 112. The lower main rod 112 serves as the bottom support structure, providing a stable load-bearing foundation and better dispersing external forces. Connecting the lower end of the vertical reinforcing rod 2 to the lower main rod 112 allows the tensile force transmitted by the vertical reinforcing rod 2 (from the first tie member 31 and the second tie member 32) to act directly on the bottom load-bearing structure of the main rod assembly 11. This avoids the tensile force being concentrated on the upper main rod 111, reducing the risk of bending or deformation of the upper main rod 111 due to excessive local stress. At the same time, the supporting characteristics of the lower main rod 112 quickly disperse the tensile force to the entire main rod assembly 11, balancing the stress state of the upper main rod 111 and the lower main rod 112, thereby effectively preventing overall deformation of the main rod assembly 11.

[0068] The lower main rod 112 is closer to the beam support structure (such as the front traveling device and the rear traveling device). When the tension of the vertical stiffener 2 is transmitted through the lower main rod 112, it can more efficiently cooperate with the support reaction force of the traveling device, reduce the transmission loss of tension inside the main rod assembly 11, and ensure that the tension can be accurately applied to the rear end area of ​​the main truss frame 1, further enhancing the constraint effect on the deformation of the front end of the main truss frame 1.

[0069] like Figure 7 , Figure 8 and Figure 9As shown, according to one embodiment of this application, the upper end face of the lower main rod 112 includes an abutment surface 1121, a transition slope 1122, and a mounting surface 1123. The abutment surface 1121 is connected to the mounting surface 1123 through the transition slope 1122, such that the height of the mounting surface 1123 is lower than that of the abutment surface 1121. The mounting surface 1123 is used to mount the crossbeam assembly 12, and the abutment surface 1121 is used to connect with the upper main rod 111. In addition to the mounting surface 1123, a mounting hole 1124 may also be provided on the lower main rod 112 for the third crossbeam 123 to pass through, so that the height of the third crossbeam 123 is consistent with that of the first crossbeam 121 and the second crossbeam 122. Of course, the third crossbeam 123 can also be mounted on the upper end face of the upper main rod 111, and the height dimension of the third crossbeam 123 can be adjusted adaptively.

[0070] The segmented design of the abutment surface 1121, transition slope 1122, and mounting surface 1123 on the upper end of the lower main rod 112 clearly delineates the installation areas of the upper main rod 111 and the crossbeam assembly 12, preventing interference caused by spatial overlap during assembly. The abutment surface 1121 is specifically designed to connect the upper main rod 111, ensuring the connection stability between the upper main rod 111 and the lower main rod 112 through a flat contact surface, reducing uneven stress caused by irregular connection surfaces. The mounting surface 1123 is lower than the abutment surface 1121, providing a recessed installation space for the crossbeam assembly 12, preventing the crossbeam assembly 12 from being installed too high, reducing the height of the operator's position, and lowering operational risks.

[0071] The transition slope 1122 connects the abutment surface 1121 and the mounting surface 1123, which can avoid the two planes forming a sharp right angle due to the height difference and reduce the risk of stress concentration at the right angle.

[0072] In some cases, when the length of the lower main rod 112 is relatively long, two main rods can be bolted together to form a single lower main rod 112.

[0073] like Figure 10 and Figure 11 As shown, according to one embodiment of this application, the upper end face of the upper main rod 111 includes a free end face 1111 and inclined surfaces 1112 located at the front and rear ends of the free end face 1111.

[0074] The free end face 1111 of the upper main strut 111 can serve as an installation or operating space for other auxiliary components of the main truss system (such as temporary supports and pipeline layout), avoiding the impact of complex end face structure on subsequent construction adaptability. The inclined surfaces 1112 located at the front and rear ends of the free end face 1111 can specifically optimize the stress state at the front and rear ends of the upper main strut 111. The front end of the upper main strut 111 needs to indirectly bear the loads transmitted by the side formwork system and the bottom basket system, and the rear end needs to cooperate with the downward pressure of the main truss frame 1 to prevent it from tipping over. If the front and rear ends are right-angled structures, stress concentration is likely to form at the corners, and long-term stress may lead to local deformation or cracking.

[0075] The inclined surface 1112, through a gentle slope transition, can distribute the load borne by the front and rear ends of the upper main rod 111 along the slope direction to the interior of the upper main rod 111 body, so that the stress is evenly distributed inside the rod body, reducing the risk of local overload and reducing the overall deformation of the upper main rod 111; at the same time, the inclined surface 1112 can change the load transmission direction, reduce the direct impact of the load on the end face of the upper main rod 111, and further protect the structural integrity of the upper main rod 111.

[0076] A bridge-building machine according to a second aspect of this application includes the aforementioned main truss system.

[0077] The bridge-building machine provided in this application embodiment is an upper-bearing bridge-building machine, which may include, exemplarily, a main truss system, including a main rod assembly 11 extending along the length direction of the beam, and a crossbeam assembly 12 extending perpendicular to the length direction of the main rod assembly 11; the main body of the crossbeam assembly 12 is located above the beam, and the edge of the crossbeam assembly 12 bends along the flange of the beam and extends to the lower part of the beam to form a limiting end, the limiting end cooperating with the lower surface of the flange to restrict the separation of the main truss system from the beam; the main rod assembly 11 is located above the beam, and the main rod assembly 11 and the crossbeam assembly 12 are fixedly connected; a traveling system is installed below the main rod assembly 11 and used to abut against the beam. The main rod assembly 11 includes a first main rod and a second main rod spaced apart along the width direction of the beam; the crossbeam assembly 12 includes a first crossbeam 121 and a second crossbeam 122 spaced apart along the length direction of the beam; the main rod assembly 11 is disposed between the crossbeam assembly 12 and the beam. The first main rod may include an upper main rod 111 and a lower main rod 112, and the second main rod also includes an upper main rod 111 and a lower main rod 112.

[0078] The upper-bearing bridge-building machine in this embodiment forms a truss structure for the main truss system through the main strut assembly 11 and the crossbeam assembly 12. The edge of the crossbeam assembly 12 bends and extends along the wing plate of the beam to form a limiting end below the beam. This limiting end cooperates with the lower surface of the wing plate to construct a limiting constraint between the main truss system and the beam, effectively restricting the separation of the main truss system from the beam, avoiding the risk of the main truss system overturning due to front-end load, and significantly improving the overall stability of the main truss system. The cooperation between the limiting end and the lower surface of the wing plate can be that the limiting end directly abuts against the lower surface of the wing plate, or that an anti-top wheel is further provided on the limiting end to abut against the lower surface of the wing plate (the anti-top wheel can be provided on the C-shaped limiting end), or that a connecting structure is provided between the limiting end and the lower surface of the wing plate for fixation.

[0079] The upper-bearing bridge-building machine in this embodiment breaks through the limitations of existing hanging baskets in terms of casting segment length. It can be applied to bridge casting with segments longer than 6 meters, reducing construction cycle losses caused by complex structures and improving bridge casting efficiency. Its novel structure solves problems such as the heavy weight, difficulty in alignment control, and inconvenient operation of traditional hanging baskets, demonstrating strong practicality and technical advantages. In the upper-bearing bridge-building machine of this embodiment, the main truss system is arranged above the beam. The limiting end formed by the bending of the edge of the crossbeam assembly 12 directly or indirectly abuts against the lower surface of the wing plate. Compared with the lower-bearing structure that relies on support below the beam, this avoids the problem of insufficient anti-overturning moment caused by the support point being located below the beam. Especially when the front end is loaded, the limiting end and the traveling system form a coordinated constraint mechanism, significantly improving anti-overturning stability. The main truss system of the upper-bearing bridge-building machine is located above the beam, leaving the space below the beam completely open and not occupying the working area under the bridge. Compared with the lower-bearing type, which requires a support structure to be arranged below the beam, it is more suitable for construction across complex terrains such as rivers and canyons, avoiding the impact of the support below on navigation and road traffic. At the same time, it provides unobstructed operating space for processes such as concrete pouring and prestressing tensioning at the bottom of the beam, improving construction convenience. The main rod assembly 11 and the crossbeam assembly 12 of the upper-bearing bridge-building machine form a truss structure, with the load-bearing members concentrated above the beam. Unlike the lower-bearing hanging basket, there is no need to set up a complex support frame below the beam, reducing structural redundancy and lowering the overall self-weight. Its design, where the limiting end acts directly on the lower surface of the flange, eliminates the bottom anchoring system or counterweight structure required by the lower-bearing type, making the beam structure simpler, significantly reducing the number of reserved holes and embedded parts on the beam surface, simplifying the construction while enhancing reliability.

[0080] 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 main truss system for a bridge-building machine, characterized in that, include: Main truss frame (1); A vertical reinforcing rod (2) is installed at its lower end on the main truss frame (1); the vertical reinforcing rod (2) is inclined so that the upper end of the vertical reinforcing rod (2) extends inclined toward the rear end of the main truss frame (1); Tension assembly (3) is used to connect the upper end of the vertical reinforcing bar (2) to at least the front end of the main truss frame (1).

2. The main truss system of the bridge-building machine according to claim 1, characterized in that, The main truss frame (1) includes a main rod assembly (11) extending along the length of the beam and a crossbeam assembly (12) extending along the length of the main rod assembly (11). The beam assembly (12) includes a first beam (121) and a second beam (122) spaced apart. The first beam (121) is located at the front end of the main truss frame (1), and the second beam (122) is located at the rear end of the main truss frame (1). The lower end of the vertical reinforcing rod (2) is connected to the main rod assembly (11) and is located between the first beam (121) and the second beam (122); or, The crossbeam assembly (12) includes a first crossbeam (121), a second crossbeam (122), and a third crossbeam (123) spaced apart. The first crossbeam (121) is located at the front end of the main truss frame (1), the second crossbeam (122) is located at the rear end of the main truss frame (1), and the third crossbeam (123) is located between the first crossbeam (121) and the second crossbeam (122). The lower end of the vertical reinforcing rod (2) is connected to the third crossbeam (123) or the main rod assembly (11).

3. The main truss system of the bridge-building machine according to claim 1, characterized in that, Along the length of the main truss frame (1), the lower end of the vertical reinforcing rod (2) is installed between the midpoint and the rear end of the main truss frame (1).

4. The main truss system of the bridge-building machine according to claim 3, characterized in that, The extension of the centerline of the vertical stiffener (2) passes through the front support point (41) of the main truss frame (1). The main truss system also includes a front traveling device, which supports the main truss frame (1) on the upper surface of the beam. The connection position between the main truss frame (1) and the front traveling device forms the front support point (41).

5. The main truss system of the bridge-building machine according to claim 4, characterized in that, The tension component (3) includes: The first tie member (31) is connected at one end to the upper end of the vertical reinforcing rod (2) and at the other end to the front end of the main truss frame (1); The second tie member (32) is connected at one end to the upper end of the vertical reinforcing rod (2) and at the other end to the rear end of the main truss frame (1).

6. The main truss system of the bridge-building machine according to claim 5, characterized in that, The extension line of the second tie member (32) passes through the rear support point (42) of the main truss frame (1). The main truss system also includes a rear traveling device. The front traveling device and the rear traveling device support the main truss frame (1) on the upper surface of the beam. The connection position between the main truss frame (1) and the rear traveling device forms the rear support point (42).

7. The main truss system of the bridge-building machine according to claim 2, characterized in that, The main rod assembly (11) includes an upper main rod (111) and a lower main rod (112) connected together. When the lower end of the vertical reinforcing rod (2) is connected to the main rod assembly (11), the lower end of the vertical reinforcing rod (2) is connected to the lower main rod (112).

8. The main truss system of the bridge-building machine according to claim 7, characterized in that, The upper end face of the lower main rod (112) includes an abutment surface (1121), a transition slope (1122) and a mounting surface (1123). The abutment surface (1121) is connected to the mounting surface (1123) through the transition slope (1122), so that the height of the mounting surface (1123) is lower than that of the abutment surface (1121). The mounting surface (1123) is used to mount the crossbeam assembly (12), and the abutment surface (1121) is used to connect with the upper main rod (111).

9. The main truss system of the bridge-building machine according to claim 7, characterized in that, The upper end face of the upper main rod (111) includes a free end face (1111) and inclined surfaces (1112) located at the front and rear ends of the free end face (1111).

10. A bridge-building machine, characterized in that, Includes the main truss system of the bridge-building machine as described in any one of claims 1 to 9.

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