A broken sling self-adapting truss structure and multi-point temporary anchoring method

Abstract

The application discloses a kind of broken sling self-adapting truss structure and multi-point temporary anchoring method, self-adapting truss structure includes broken sling and its both sides adjacent sling, first self-adapting pull rod, second self-adapting pull rod, standard compression bar and lifting steel crossbeam;The upper cable section of the broken sling is connected lifting steel crossbeam by second self-adapting pull rod and is anchored by jacking device and anchoring piece;The lower cable section of the broken sling is connected two sides adjacent sling by standard compression bar, and is connected the both ends of lifting steel crossbeam by first self-adapting pull rod;The both ends of the lifting steel crossbeam are connected two sides adjacent sling by first self-adapting pull rod;The broken sling, adjacent sling and first self-adapting pull rod, second self-adapting pull rod, standard compression bar are connected by full degree of freedom multi-direction fastener between them.The application can realize multi-point temporary anchoring at broken place, wide application, no high-altitude operation risk, strong stability, small anchoring force, small linear disturbance, construction is quick and simple.

Description

Technical Field

[0001] This invention belongs to the field of sling repair and reinforcement technology, and more specifically, relates to an adaptive truss structure for broken slings and a multi-point temporary anchoring method. Background Technology

[0002] As a key force-transmitting component of cable-stayed bridge systems, suspenders function to transfer the structural dead load and bridge deck live load to the main load-bearing components. Their service performance is crucial to the safety of the entire bridge. However, suspenders are subjected to the combined effects of various factors such as sunlight, rainfall, vehicle fatigue, wind-induced vibration, and material aging. After a period of operation, they may develop defects such as corrosion and broken wires, leading to a decline in mechanical properties and even fracture, endangering the structural safety of the bridge.

[0003] If a suspension cable breaks, the bridge structure and pedestrian safety will be seriously threatened. In this case, temporary anchoring devices can be used to restore the original load-bearing capacity and structural alignment at the location of the broken cable, ensuring smooth traffic flow and reducing social impact.

[0004] Currently, there is limited technical information available regarding temporary anchoring methods for broken slings. However, in devices used for sling replacement, similar temporary sling or tensioning systems are typically employed to transfer the cable force of the sling to be replaced to a temporary suspender before replacement. The core principle is to arrange temporary cables on one or both sides of the permanent cable at a single lifting point using lifting lugs or hoisting holes. Furthermore, the installation of these temporary cables requires anchoring them to the main cable or arch ribs above them using various tooling fixtures. If the aforementioned technical solutions are used for temporary anchoring of broken slings, the following problems arise: (1) For cable-stayed bridges without pre-reserved lug holes or hoisting holes, there is a problem that installation can only be carried out by drilling or adding tools, and the installation and construction process is complicated. (2) Temporary cables are used to replace broken cables at single suspension points. The stability of the temporary anchorage system at single suspension points is poor, and the cable force of the temporary cables is large, which causes great disturbance to the alignment of the main cable and stiffening beam, and may even cause unevenness of the bridge deck alignment. (3) The installation of temporary cables needs to be anchored to the main load-bearing components above. For temporary anchoring of broken long cables, high-altitude operations are required, which presents problems such as long construction time and high difficulty. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned shortcomings by providing an adaptive truss structure for broken slings and a multi-point temporary anchoring method, which solves the technical problem of temporarily anchoring broken slings under various conditions such as not requiring pre-reserved hoisting holes or lug holes, no high-altitude work, high stability, reduced tension, small linear disturbance, and simple construction.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: The present invention provides a fractured cable adaptive truss structure, including a fractured cable and adjacent cables on both sides, a first adaptive tie rod, a second adaptive tie rod, a standard compression member, and a lifting steel crossbeam; The upper section of the broken sling is connected to the lifting steel beam via a second adaptive tie rod and anchored by a lifting device and anchors. The lower section of the broken sling is connected to the adjacent slings on both sides by a standard pressure bar, and is connected to both ends of the lifting steel beam by a first adaptive tie rod; the two ends of the lifting steel beam are connected to the adjacent slings on both sides by the first adaptive tie rod. The broken sling, adjacent slings, first adaptive tie rod, second adaptive tie rod, and standard pressure rod are all connected by multi-directional fasteners with full degrees of freedom.

[0007] Furthermore, the upper section of the broken sling is connected to the tops of two second adaptive tie rods on both sides by multi-directional fasteners with full degrees of freedom, and the bottom ends of the two second adaptive tie rods are anchored to the bottom of the lifting steel beam.

[0008] Furthermore, the lower section of the broken sling adopts the same arrangement on both sides. Each side is connected to a standard compression bar and a first adaptive tie bar via fully-degree-of-freedom multi-directional fasteners. The other ends of the standard compression bar and the first adaptive tie bar are respectively connected to the adjacent sling and the end of the lifting steel beam on that side. A first adaptive tie bar is also connected between the adjacent sling and the end of the lifting steel beam on that side. The adjacent slings are also connected to the standard compression bar and the first adaptive tie bar on the same side via fully-degree-of-freedom multi-directional fasteners.

[0009] Furthermore, the fully free-degree-of-freedom multi-directional fastener consists of two clamps with sling holes that fasten together. The sling hole formed between the two clamps is used to connect slings. Connecting plates and connecting holes are provided on both sides of the clamps for connecting adaptive tie rods and / or standard compression rods. During installation, a fully free-degree-of-freedom, multi-directional fastening connection is achieved by rotating the fastener around the sling hole, and by rotating the connecting rods when connecting truss structural members.

[0010] Furthermore, the lifting steel beam has a vertical tie rod hole in the middle for the second adaptive tie rod to pass through, and full-degree-of-freedom multi-directional connecting plates at both ends for connecting the first adaptive tie rod.

[0011] Furthermore, both ends of the first adaptive tie rod and the standard compression rod are provided with multi-directional connecting plates with full degrees of freedom, which are used to connect the lifting steel crossbeam or multi-directional fasteners with full degrees of freedom.

[0012] Furthermore, one end of the second adaptive tie rod is provided with a fully free multi-directional connecting plate for connecting fully free multi-directional fasteners, and the other end is provided with an external thread for connecting anchors.

[0013] Furthermore, the lifting device is a jack, and the anchor is an anchor nut.

[0014] The present invention also provides a method for multi-point temporary anchoring of a broken sling, comprising the following steps: Install multi-directional fasteners with full degrees of freedom on the upper section of the broken sling, the lower section of the broken sling, and adjacent slings; Connect the fully free-degree-of-freedom multi-directional fasteners and standard compression bars and the first adaptive tie bar on adjacent slings; Connect the fully free-degree-of-freedom multi-directional fasteners and standard pressure bar and first adaptive tie bar to the lower section of the broken sling. Connect the lower cable segment of the broken sling and the first adaptive tie rod of the adjacent sling to the end of the lifting steel beam; After the second adaptive tie rod passes under the lifting steel crossbeam, the top of the second adaptive tie rod is connected to the full-degree-of-freedom multi-directional fastener of the upper section of the broken sling. Install the lifting device and anchors below the second adaptive tie rod; The steel beam is lifted using a jacking device and then temporarily anchored after being placed in position.

[0015] Furthermore, after the steel crossbeam is lifted, the lifting force, through the adaptive truss structure, restores the bridge alignment to a smooth state, and the tension of the broken cable is restored to its pre-fracture level, indicating that the bridge is now in place.

[0016] In this invention, the first adaptive tie rod is located in the middle of the truss structure, connecting the lifting steel crossbeam and the lower fully free-degree multi-directional fastener; the function of the second adaptive tie rod is to connect the lifting steel crossbeam and the upper fully free-degree multi-directional fastener. By rotating the first adaptive tie rod and combining the changes in the anchorage position of the second adaptive tie rod and the lifting steel crossbeam, it can be adapted to different cable spacings.

[0017] After all components are connected, the lifting steel beam transfers the anchoring force of the jack to the lower section of the broken sling and the adjacent sling through the first adaptive tie rod, and at the same time to the upper section of the broken sling through the second adaptive tie rod. Since the adjacent slings participate in the force, a multi-point temporary anchoring system with strong stability is formed. As the anchoring force gradually increases, the beam shape at the broken sling can be restored to smoothness, realizing multi-point temporary anchoring at the broken sling.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention utilizes an adaptive truss structure formed by inter-component anchorage to connect broken cables with adjacent cables to form a multi-point anchorage system, thereby achieving multi-point temporary anchorage at the broken cable location. It does not require pre-reserved lifting holes or lug holes in the original bridge structure and is applicable to all vertical cable-stayed bridge systems. The adaptive truss structure described in this invention is anchored at multiple points only between the broken sling and the adjacent sling through components, without needing to be anchored to the main load-bearing components above the sling, thus eliminating the risk of working at heights. This invention only requires adjusting the length of the standard pressure bar to achieve multi-point adaptive different sling spacings, making it widely applicable; This invention utilizes a multi-point truss structure composed of triangles, which has the characteristics of high stability, low anchoring force, and small linear disturbance. This invention uses prefabricated standardized components for assembly, making construction quick and easy. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a fractured cable adaptive truss structure provided in Example 1; Figure 2 This is a schematic diagram of the lifting steel beam described in Example 1; Figure 3 This is a schematic diagram of the structure of the multi-directional fastener with full degrees of freedom described in Example 1; Figure 4 This is a schematic diagram of the connection structure between the fully free-degree-of-freedom multi-directional fastener, the first adaptive tie rod, and the standard compression rod described in Example 1. Figure 5 This is a schematic diagram of the connection structure between the fully free-degree-of-freedom multi-directional fastener and the second adaptive tie rod described in Example 1; Figure 6 This is a schematic diagram of the structure of the first adaptive tie rod described in Example 1; Figure 7 This is a schematic diagram of the structure of the second adaptive tie rod described in Example 1.

[0020] In the diagram: 1. Upper section of the broken sling; 2. Lower section of the broken sling; 3. Adjacent slings; 4. Lifting steel beam; 41. Tie rod hole; 5. First adaptive tie rod; 6. Second adaptive tie rod; 61. External thread; 7. Standard pressure bar; 8. Fully free-degree multi-directional connecting plate; 9. Fully free-degree multi-directional fastener; 91. Clamping plate; 92. Sling hole; 93. Connecting plate accommodating space; 94. Connecting hole; 10. Jack; 11. Anchor nut. Detailed Implementation

[0021] Preferred embodiments of the present invention will now be described in more detail with reference to the accompanying drawings and specific examples.

[0022] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and for 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] Example 1 This embodiment provides a fractured cable adaptive truss structure, such as... Figure 1 As shown, it includes: a broken sling and its adjacent slings 3 on both sides, a first adaptive tie rod 5, a second adaptive tie rod 6, a standard compression rod 7, and a lifting steel crossbeam 4; the broken sling includes an upper section 1 and a lower section 2. The upper cable section 1 of the broken sling is connected to the lifting steel beam 4 through the second adaptive tie rod 6 and is anchored by the jack 10 and the anchor nut 11. The lower section 2 of the broken sling is connected to the adjacent slings 3 on both sides by a standard pressure bar 7, and is connected to both ends of the lifting steel beam 4 by a first adaptive tie rod 5; the two ends of the lifting steel beam 4 are connected to the adjacent slings 3 on both sides by the first adaptive tie rod 5. The upper cable segment 1 of the broken sling, the lower cable segment 2 of the broken sling, the adjacent sling 3, and the first adaptive tie rod 5, the second adaptive tie rod 6, and the standard pressure rod 7 are all connected by multi-directional fasteners with full degrees of freedom 9.

[0025] In specific application examples, such as Figure 2As shown, the lifting steel beam 4 has a tie rod hole 41 in the middle for the second adaptive tie rod 6 to pass through, and full-degree-of-freedom multi-directional connecting plates 8 at both ends for connecting the first adaptive tie rod 5.

[0026] like Figure 3 As shown, the fully free-degree-of-freedom multi-directional fastener 9 consists of two clamping plates 91 with sling holes 92 that fasten against each other. The sling hole 92 formed between the two clamping plates 91 is used to connect slings. The clamping plates 91 are provided with connecting plate accommodating spaces 93 and connecting holes 94 on both sides for connecting adaptive tie rods and / or standard compression rods 7. During installation, a fully free-degree-of-freedom, multi-directional fastening connection is achieved by rotating around the sling hole 92 and by rotating the connecting rods when connecting truss structural members.

[0027] like Figure 1 and Figure 4 As shown, the lower cable section 2 of the broken sling adopts the same arrangement on both sides. Each side is connected to a standard pressure bar 7 and a first adaptive tie bar 5 by a multi-directional fastener 9. The other end of the standard pressure bar 7 is connected to the adjacent sling 3 on that side by a multi-directional fastener 9. The multi-directional fastener 9 of the adjacent sling 3 is also connected to a first adaptive tie bar 5. The other ends of the two first adaptive tie bars 5 are connected to the end of the lifting steel beam 4 near that side.

[0028] like Figure 1 and Figure 5 As shown, the upper cable segment 1 of the broken sling is connected to the top of two second adaptive tie rods 6 on both sides by a multi-directional fastener with full degrees of freedom 9, and the bottom ends of the two second adaptive tie rods 6 are anchored to the bottom of the lifting steel beam 4.

[0029] like Figure 6 As shown, both ends of the first adaptive tie rod 5 and the standard pressure rod 7 are equipped with multi-directional connecting plates with full degrees of freedom, used to connect the lifting steel crossbeam 4 or the multi-directional fastener 9 with full degrees of freedom. The connection between the first adaptive tie rod 5 and the standard pressure rod 7 and the multi-directional fastener 9 with full degrees of freedom is as follows: Figure 4 As shown, the full-degree-of-freedom multi-directional connecting plates 8 at the ends of the first adaptive tie rod 5 and the standard pressure rod 7 are placed into the connecting plate accommodating space 93 of the full-degree-of-freedom multi-directional fastener 9, and then fixed by screws or bolts passing through the connecting holes 94.

[0030] like Figure 7 As shown, one end of the second adaptive tie rod 6 is provided with a fully free-degree-of-freedom multi-directional connecting plate 8 for connecting a fully free-degree-of-freedom multi-directional fastener 9, such as... Figure 5As shown, the fully free-degree-of-freedom multi-directional connecting plate 8 at the end of the second adaptive tie rod 6 is placed into the connecting plate receiving space 93 of the fully free-degree-of-freedom multi-directional fastener 9, and then fixed by screws or bolts passing through the connecting hole 94; the other end of the second adaptive tie rod 6 is provided with an external thread 61 for connecting the anchor nut 11, such as... Figure 1 As shown.

[0031] Example 2 The present invention also provides a method for multi-point temporary anchoring of a broken sling, comprising the following steps: Install multi-directional fasteners with full degrees of freedom on the upper section 1 of the broken sling, the lower section 2 of the broken sling, and the adjacent sling 3; Connect the fully free-degree-of-freedom multi-directional fasteners 9, standard pressure bars 7, and first adaptive tie bars 5 on adjacent slings 3; Connect the fully free-degree-of-freedom multi-directional fastener 9 to the standard pressure bar 7 and the first adaptive tie bar 5 to the lower section 2 of the broken sling. Connect the end of the first adaptive tie rod 5, which is connected to the lower cable segment 2 of the broken sling and the adjacent sling 3, and the lifting steel beam 4. After the second adaptive tie rod 6 passes under the lifting steel crossbeam 4, the top of the second adaptive tie rod 6 is connected to the full-degree-of-freedom multi-directional fastener 9 of the upper cable segment 1 of the broken sling. Install jack 10 and anchor nut 11 below the second adaptive tie rod 6; Using jack 10, the steel crossbeam 4 was lifted until the bridge alignment was restored to smoothness and the tension of the broken cable was restored to its pre-breakage state, thus completing the temporary anchoring.

[0032] The multi-point temporary anchoring method described in this embodiment establishes... Figure 1 The adaptive truss structure of the broken cable shown has the following steps: After all components are connected, the lifting steel beam 4 is raised. The lifting steel beam 4 transmits the anchoring force of the jack 10 to the lower cable section 2 of the broken cable and the adjacent cable 3 through the first adaptive tie rod 5, and at the same time, it transmits it to the upper cable section 1 of the broken cable through the second adaptive tie rod 6. Since the adjacent cable 3 participates in the force, a multi-point temporary anchoring system with strong stability is formed. As the anchoring force gradually increases, the beam shape at the broken cable can be restored to smoothness, realizing multi-point temporary anchoring at the broken cable.

[0033] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and principles of the described embodiments, and these modifications and variations should also be considered within the scope of protection of the present invention.

Claims

1. A fractured cable adaptive truss structure, characterized in that, This includes the broken sling and its adjacent slings on both sides, the first adaptive tie rod, the second adaptive tie rod, the standard compression bar, and the lifting steel crossbeam; The upper section of the broken sling is connected to the lifting steel beam via a second adaptive tie rod and anchored by a lifting device and anchors. The lower section of the broken sling is connected to the adjacent slings on both sides by a standard pressure bar, and is connected to both ends of the lifting steel beam by a first adaptive tie rod; the two ends of the lifting steel beam are connected to the adjacent slings on both sides by the first adaptive tie rod; the upper section of the broken sling is connected to the tops of two second adaptive tie rods on both sides by a multi-directional fastener with full degrees of freedom, and the bottom ends of the two second adaptive tie rods are anchored to the bottom of the lifting steel beam; The lower section of the broken sling adopts the same arrangement on both sides. Each side is connected to a standard pressure bar and a first adaptive tie bar by a multi-directional fastener with full degrees of freedom. The other end of the standard pressure bar is connected to the adjacent sling on that side, and the other end of the first adaptive tie bar is connected to the end of the lifting steel beam on that side. The adjacent sling and the end of the lifting steel beam on that side are also connected by a first adaptive tie bar.

2. The self-adaptive truss structure with fractured cable according to claim 1, characterized in that, The fully free-degree-of-freedom multi-directional fastener consists of two clamps with sling holes that fasten to each other. The sling hole formed between the two clamps is used to connect slings. The clamps are provided with connecting plate accommodating space and connecting holes on both sides for connecting adaptive tie rods and / or standard pressure rods.

3. The self-adaptive truss structure with fractured cable according to claim 1, characterized in that, The lifting steel beam has a vertical tie rod hole in the middle and multi-directional connecting plates with full degrees of freedom at both ends.

4. The self-adaptive truss structure with fractured cable according to claim 1, characterized in that, Both ends of the first adaptive tie rod and the standard compression rod are equipped with multi-directional connecting plates with full degrees of freedom, which are used to connect the lifting steel crossbeam or multi-directional fasteners with full degrees of freedom.

5. The self-adaptive truss structure with fractured cable according to claim 1, characterized in that, The second adaptive tie rod has a fully free multi-directional connecting plate at one end for connecting fully free multi-directional fasteners, and an external thread at the other end for connecting anchors.

6. The self-adaptive truss structure with fractured cable according to claim 1, characterized in that, The lifting device is a jack, and the anchor is an anchor nut.

7. A method for multi-point temporary anchoring of a broken sling, based on the adaptive truss structure for broken slings as described in any one of claims 1 to 6, characterized in that, include: Install multi-directional fasteners with full degrees of freedom on the upper section of the broken sling, the lower section of the broken sling, and adjacent slings; Connect the fully free-degree-of-freedom multi-directional fasteners and standard compression bars and the first adaptive tie bar on adjacent slings; Connect the lower section of the broken sling with a multi-directional fastener with full degrees of freedom, a standard compression bar, and a first adaptive tie bar; Connect the lower cable segment of the broken sling and the first adaptive tie rod of the adjacent sling to the end of the lifting steel beam; After the second adaptive tie rod passes under the lifting steel crossbeam, the top of the second adaptive tie rod is connected to the full-degree-of-freedom multi-directional fastener of the upper section of the broken sling. Install the lifting device and anchors below the second adaptive tie rod; The steel beam is lifted using a jacking device and then temporarily anchored after being placed in position.

8. The method for multi-point temporary anchoring of a broken sling according to claim 7, characterized in that, The lifting and positioning process involves lifting the steel crossbeam, and the lifting force restores the bridge alignment to a smooth state, while the tension of the broken cable is restored to its pre-breakage state.

Images