Permanent and temporary combined type anchorage for anchoring buckling cable of arch rib cable-stayed buckling system

Abstract

The utility model relates to a permanent and temporary combined anchorage for anchoring a buckle cable of an arch rib cable-stayed buckling system, which is arranged at a tunnel portal in a mountain and comprises an end wall and a bottom plate of a tunnel permanent structure as well as an anchor wall, an anchor cable, an anchor seat and a pull anchor connector of an anchorage temporary structure, and the anchor wall, the tunnel end wall and the bottom plate are poured into a whole. The anchor cable penetrates through the anchor wall and the end wall, one end of the anchor cable penetrates into a mountain below the tunnel, the other end of the anchor cable is connected with the anchor seat on the outer side of the anchor wall, and the anchor pulling connector is rotationally connected with the anchor seat through a pin shaft. According to the tunnel permanent structure, the anchorage and the temporary structure are combined, the stability of the anchorage can be guaranteed, and meanwhile cost input is reduced; the anchor wall can be converted into a tunnel permanent structure after construction is completed, the effect of reinforcing the tunnel end wall is achieved, and material waste is reduced; and the anchorage is located in the tunnel, constructors conduct tensioning operation on the buckle cable in the tunnel, and safety is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge construction, relates to the installation and construction of arch ribs of arch bridges by adopting an inclined buckle-hanging method, and specifically relates to a permanent and temporary combined anchor for anchoring cables of an inclined buckle-hanging system of an arch rib. Background Art

[0002] The arch ribs of large-span arch bridges are often installed and constructed by the inclined-stayed buckle-hanging method. When the terrain on the shore is relatively flat, the inclined-stayed buckle-hanging system usually sets buckle towers, anchors and buckle back cables. One end of the buckle cable is anchored to the arch rib, one end of the back cable is anchored to the anchor, and the other end of the buckle cable and the back cable is the tension end, which is anchored to the buckle tower. As a temporary structure, the inclined-stayed buckle-hanging system needs to be dismantled after construction, which wastes a lot of materials. Therefore, in the environment where the shore is a steep mountain, the terrain conditions are often used, and no buckle towers and back cables are set. Anchors are set on the hillside, and the tensioned end of the buckle cable is directly connected to the anchor on the hillside. However, setting anchors on the hillside requires high integrity of the mountain geology and rocks. When the rock layer is relatively fragile, the rock mass needs to be reinforced, the construction cost is high, and when the buckle cable is tensioned, the construction workers need to climb on the steep mountain, which is risky.

[0003] When designing mountain bridges, tunnels are usually built inside the mountains to connect the bridges. As tunnels are permanent structures, the surrounding rock mass has been reinforced during construction. Therefore, it is possible to consider using the permanent structure of the tunnel to set up anchors to ensure the stability of the anchors and save costs. Summary of the invention

[0004] The utility model aims at solving the above problems and provides a permanent and temporary combined anchorage for anchoring the cable of the arch rib inclined buckle hanging system by utilizing the permanent structure of the tunnel.

[0005] The technical solution of the utility model is as follows:

[0006] A permanent and temporary combined anchor for anchoring the cable of the arch rib inclined buckle hanging system, characterized in that: the anchor is arranged at the tunnel portal in the mountain, including the end wall and the bottom plate of the tunnel permanent structure, and the anchor wall, anchor cable, anchor seat and anchor connector of the temporary anchor structure, the anchor wall is cast as a whole with the tunnel end wall and the bottom plate, the anchor cable passes through the anchor wall and the end wall, one end of the anchor cable penetrates into the mountain below the tunnel, and the other end is connected to the anchor seat outside the anchor wall, and the anchor connector is rotatably connected to the anchor seat through a pin shaft.

[0007] The utility model has the following advantages:

[0008] 1. Combine the end wall and bottom plate of the permanent structure of the tunnel in the mountain with the anchor wall, anchor seat, anchor cable and anchor pull of the temporary structure of the anchor to form a permanent and temporary combined anchor, which ensures the stability and safety of the anchor and reduces the cost investment;

[0009] 2. The anchor wall does not need to be removed after construction is completed. It can be transformed into a permanent structure of the tunnel, which strengthens the end wall of the tunnel and reduces material waste;

[0010] 3. The anchor is located inside the tunnel, and the construction workers tension the cables inside the tunnel, which is easy to operate and avoids the construction risks of tensioning on mountain cliffs. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a side view structural schematic diagram of the utility model;

[0012] Figure 2 It is a front structural schematic diagram of the utility model;

[0013] Figure 3 It is a schematic diagram of the state of the utility model being used for the oblique stay and buckle hanging construction of the arch rib of an arch bridge. DETAILED DESCRIPTION

[0014] like Figure 1 , Figure 2 As shown, the utility model anchor is arranged at the portal of a tunnel 10 in a mountain, and comprises an end wall 1 and a bottom plate 2 of a permanent structure of the tunnel, and an anchor wall 3, an anchor cable 4, an anchor seat 5 and an anchor connector 6 of a temporary structure of the anchor. The anchor wall 3 is cast as a whole with the tunnel end wall 1 and the bottom plate 2, and the anchor cable 4 passes through the anchor wall 3 and the end wall 1. One end of the anchor cable 4 penetrates into the mountain below the tunnel 10, and the other end is connected to the anchor seat 5 on the outside of the anchor wall. The anchor connector 6 is rotatably connected to the anchor seat 5 through a pin shaft.

[0015] like Figure 3 As shown, in a specific application embodiment of the utility model, the terrain on one side of the construction location of the arch bridge 11 is relatively gentle, and the other side is a steep mountain. A tunnel 10 is provided on the mountain to connect with the arch bridge 11. The arch rib 12 of the arch bridge is constructed by a cable-stayed buckle-hanging method. The cable-stayed buckle-hanging system is provided with a buckle tower 13 on the gentle side. One end of the buckle cable 14 on this side is anchored to the arch rib 12, and the other end is connected to the buckle tower 13. No buckle tower is provided on the steep mountain side, but anchors 15 are provided on the hillside according to the terrain. One of the anchors 15 is provided at the tunnel portal. One end of the buckle cable 14 on this side is anchored to the arch rib 12, and the other end is anchored to the anchor 15 on the hillside.

[0016] like Figure 1 and Figure 3 As shown in the figure, part of the cable 14 on one side of the mountain turns into the tunnel entrance and enters the tunnel to connect with the anchor connector 6 on the anchor. When the cable 14 is tensioned, the construction workers can operate in the tunnel 10. Compared with the anchor set on the hillside, the construction is safer.

[0017] During the construction of the tunnel end wall, anchor cable holes are reserved according to the designed installation position of the anchor cable; when pouring the anchor wall, anchor cable holes are also reserved on the anchor wall, and the anchor cable is drilled to the designed anchoring depth. The grouting technology from the bottom of the hole to the top is adopted. After the concrete strength of the anchor wall reaches 100%, the anchor seat and anchor device are installed, and the anchor cable is tensioned in stages to the designed value. The pre-tensioning force is diffused to the mountain through the anchor seat, anchor wall and permanent end wall, completing the end anchoring construction. Then the anchor pull connector is installed to connect the buckle cable.

[0018] After the arch rib construction is completed, the buckle cable is released, and the anchor seat and anchor connector are removed. Since the anchor wall is located in the tunnel, the anchor wall 3 does not need to be removed and is converted into a permanent structure of the tunnel, which not only reduces material waste but also reinforces the tunnel end wall 1.

Claims

1. A permanent and temporary combined anchorage for anchoring the cable of the arch rib inclined buckle hanging system, characterized in that: The anchor is arranged at the tunnel portal in the mountain, and includes the end wall and bottom plate of the permanent structure of the tunnel, and the anchor wall, anchor cable, anchor seat and anchor connector of the temporary structure of the anchor. The anchor wall is cast as one with the end wall and bottom plate of the tunnel, and the anchor cable passes through the anchor wall and the end wall. One end of the anchor cable penetrates into the mountain below the tunnel, and the other end is connected to the anchor seat on the outside of the anchor wall. The anchor connector is rotatably connected to the anchor seat through a pin shaft.

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