Roadbed structure transversely penetrating existing line tunnel portal

Abstract

The utility model provides an existing line crossing tunnel portal roadbed structure, and belongs to the technical field of line tunnel portal roadbed structures. The roadbed structure is applied to a mountain body above an existing tunnel, a foundation road surface is formed in the mountain body through excavation, the roadbed structure is constructed on the road surface and comprises a supporting rod fixed to the top end of the mountain body and a protective net installed on the supporting rod, the supporting rod is slidably sleeved with a lifting frame, and a fixing base is arranged on one side of the supporting rod; second positioning cones inserted into the mountain are fixed to the bottom end of the fixing base and the bottom end of the supporting rod correspondingly, and a bearing rod is rotationally installed between the fixing base and the lifting frame. The interception area of rolling stones is increased through the protective net, the multiple supporting rods are mutually fixed through the connecting rods in the through holes and the first bolts, the lifting frames on the supporting rods transmit impact force through the bearing rods and the fixing bases, the bearing rods and the second positioning cones at the bottom ends of the fixing bases are stabilized in a mountain, and therefore the rolling stones are prevented from falling off. And the stability of the supporting rod impacted by rolling stones is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of roadbed structure for tunnel entrances, and in particular to a roadbed structure for tunnel entrances that crosses existing railway lines. Background Technology

[0002] The impact of road cut excavation on the surrounding environment is mainly twofold: Firstly, the redistribution of stress in the nearby mountains caused by the unloading during road cut construction leads to vertical displacement of nearby buildings along with the rock strata. For existing tunnels, the difference in stiffness between the tunnel lining and the surrounding rock results in different settlement amounts, making the tunnel lining prone to vertical settlement failure. Secondly, tunnels in soft soil foundations experience horizontal displacement due to road cut excavation. If the deformation of surrounding buildings and structures is minimal, their safe use can be guaranteed. However, for adjacent tunnels, it will cause stress and strain in the tunnel lining. If the tunnel lining cannot withstand the stress and deformation, tunnel deformation and displacement will occur, potentially even damaging the tunnel lining.

[0003] Patent application number 202121070092.2 discloses a roadbed structure that crosses the entrance of an existing railway tunnel and is applied in the mountain above the operating tunnel. The road surface is formed by excavation within the mountain, and the roadbed structure is constructed on the road surface. It includes a protective frame system, which is installed on the mountain above the operating tunnel. The protective frame system includes at least a concrete subbase platform and steel pipe supports and bamboo and wood frames set on the concrete subbase platform. Anti-rolling stone ditches are excavated in the mountain and are located on the side of the protective frame system away from the operating tunnel.

[0004] The above-mentioned technical solution uses a vertically set protective frame system to block and protect against rolling stones. However, due to the lack of support strength of the vertically set protective frame system, it is prone to tilting and collapsing when hit by rolling stones, resulting in poor stability of rolling stone protection. Therefore, this application provides a roadbed structure that crosses the entrance of an existing railway tunnel to meet the requirements. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a roadbed structure that crosses the entrance of an existing railway tunnel to solve the problem that the existing vertically set protective frame system lacks support strength and is prone to tilting and collapsing when hit by rolling stones, thus resulting in poor stability of rolling stone protection.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] A roadbed structure for traversing the entrance of an existing railway tunnel is applied in the mountain above the existing tunnel. The roadbed is constructed on the road surface by excavation within the mountain. It includes a support rod fixed to the top of the mountain and a protective net installed on the support rod. A lifting frame is slidably sleeved on the support rod, and a fixed seat is provided on one side of the support rod. A second positioning cone inserted into the mountain is fixed to both the fixed seat and the bottom end of the support rod. A load-bearing rod is rotatably installed between the fixed seat and the lifting frame.

[0008] Optionally, the top of the mountain is provided with the original ground line located above the foundation road surface, and a temporary drainage ditch is provided on the mountain.

[0009] Optionally, an additional layer is provided at the top of the foundation road surface, and drainage ditches are installed at both ends of the foundation road surface.

[0010] Optionally, multiple baffles are fixed at equal intervals on the inclined side of the mountain, and a first positioning cone embedded in the mountain is fixed at the bottom end of the side wall of the baffle. The side wall of the existing track is provided with a track door.

[0011] Optionally, the support rod has multiple grooves at equal intervals, and the ropes on the protective net are embedded and wound in the grooves.

[0012] Optionally, the sidewall of the support rod is provided with multiple through holes in the transverse direction, and the support rod is provided with multiple mounting holes in the longitudinal direction that communicate with the through holes.

[0013] Optionally, a connecting rod is tightly inserted between the plurality of through holes, and a first bolt is embedded in the mounting hole.

[0014] Optionally, the first bolt is slidably inserted into the connecting rod, and a nut is threaded onto one end of the first bolt that passes through the support rod.

[0015] Optionally, a second bolt is threaded into the side wall of the lifting frame, and the second bolt is tightly connected to the side wall of the support rod.

[0016] Optionally, both the lifting frame and the fixed base are equipped with pins, and both ends of the load-bearing rod are rotatably connected to the pins.

[0017] Compared with the prior art, this utility model has at least the following beneficial effects:

[0018] In the above scheme, protective nets are installed on the side walls of multiple support rods, which increases the interception area for rolling stones. Multiple support rods are fixed to each other through connecting rods in through holes and first bolts. At the same time, the lifting frame on the support rods transmits the impact force through the load-bearing rods and fixed seats. The second positioning cones at the bottom of the load-bearing rods and fixed seats are stabilized in the mountain, which improves the stability of the support rods under the impact of rolling stones.

[0019] By installing multiple baffles on the sidewalls of the mountain, with the first positioning cone of the baffle sidewall embedded and fixed in the mountain, the small boulders passing through the protective net are intercepted by the multiple baffles, thus improving the interception effect of the boulders. Attached Figure Description

[0020] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the present invention and, together with the specification, further serve to explain the principles of the present invention and enable those skilled in the art to implement and use the present invention.

[0021] Figure 1 A three-dimensional structural diagram of the roadbed structure at the entrance of a tunnel that crosses an existing railway line.

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of the support rod;

[0023] Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0024] Figure 4 This is a schematic diagram of the three-dimensional structure of the load-bearing rod.

[0025] Figure label:

[0026] 1. Mountain; 2. Existing tunnel; 3. First positioning cone; 4. Track door; 5. Baffle; 6. Support rod; 7. Protective net; 8. Foundation; 9. Drainage ditch; 10. Original ground line; 11. Temporary drainage ditch; 12. Connecting rod; 13. Groove; 14. Load-bearing rod; 15. Bolt; 16. Through hole; 17. Mounting hole; 18. Lifting frame; 19. Fixed seat; 20. Second positioning cone; 21. Second bolt.

[0027] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiment of this utility model. However, this is only for illustrative purposes and is not intended to limit this utility model to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0028] The following is a detailed description of a roadbed structure for a tunnel entrance crossing an existing railway line provided by this utility model, with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; those skilled in the art can also use other alternative methods to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit this utility model.

[0029] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0030] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0031] It is understood that the meanings of “on”, “above”, and “above” in this utility model should be interpreted in the broadest manner, such that “on” not only means “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” not only means “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0032] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0033] like Figure 1 and Figure 2 As shown, an embodiment of this utility model provides a roadbed structure that crosses the entrance of an existing railway tunnel. It is applied in a mountain 1 above an existing tunnel 2. The mountain 1 is excavated to form a foundation 8 road surface. The roadbed structure is constructed on the road surface and includes a support rod 6 fixed to the top of the mountain 1 and a protective net 7 installed on the support rod 6. A lifting frame 18 is slidably sleeved on the support rod 6, and a fixed seat 19 is provided on one side of the support rod 6. The bottom ends of the fixed seat 19 and the support rod 6 are both fixed with a second positioning cone 20 inserted into the mountain 1, and a load-bearing rod 14 is rotatably installed between the fixed seat 19 and the lifting frame 18.

[0034] The top of the mountain 1 is provided with the original ground line 10 located above the road surface of the foundation 8, and a temporary drainage ditch 11 is opened on the mountain 1. An additional floor is provided at the top of the road surface of the foundation 8, and drainage ditches 9 are installed at both ends of the road surface of the foundation 8. Multiple baffles 5 are fixed at equal intervals on the inclined side of the mountain 1. The bottom of the side wall of the baffle 5 is fixed with a first positioning cone 3 embedded in the mountain 1. The side wall of the existing track is provided with a track door 4. Multiple grooves 13 are opened at equal intervals on the support rod 6. The rope on the protective net 7 is embedded and wound in the grooves 13. The first positioning cone 3 on the side wall of the baffle 5 is embedded and fixed in the mountain 1. The multiple baffles 5 intercept small rolling stones passing through the protective net 7, thereby improving the interception effect of rolling stones.

[0035] like Figure 3 and Figure 4 As shown, the side wall of the support rod 6 has multiple through holes 16 opened laterally, and the support rod 6 has multiple mounting holes 17 connected to the through holes 16 longitudinally. Connecting rods 12 are tightly inserted between the multiple through holes 16. A first bolt 15 is embedded in the mounting hole 17. The first bolt 15 is slidably inserted into the connecting rod 12, and a nut is threaded onto one end of the first bolt 15 that passes through the support rod 6. A second bolt 21 is threaded into the side wall of the lifting frame 18. The second bolt 21 is tightly connected to the side wall of the support rod 6. Pins are installed in both the lifting frame 18 and the fixed seat 19. Both ends of the load-bearing rod 14 are rotatably connected to the pins. The protective net 7 increases the interception area for rolling stones. The multiple support rods 6 are kept fixed to each other through the connecting rods 12 in the through holes 16 and the first bolts 15. At the same time, the lifting frame 18 on the support rod 6 transmits the impact force through the load-bearing rod 14 and the fixed seat 19. The second positioning cone 20 at the bottom of the load-bearing rod 14 and the fixed seat 19 is stabilized in the mountain 1.

[0036] The working principle provided by this utility model is as follows: during use, multiple support rods 6 and the first positioning cone 3 at the bottom of the fixing seat 19 are embedded and fixed in the mountain body 1, and the rope on the protective net 7 is wrapped in the groove 13 on the support rod 6. The protective net 7 increases the interception area for rolling stones. Multiple support rods 6 are kept fixed to each other through the connecting rod 12 in the through hole 16 and the first bolt 15. At the same time, the lifting frame 18 on the support rod 6 transmits the impact force through the load-bearing rod 14 and the fixing seat 19. The second positioning cone 20 at the bottom of the load-bearing rod 14 and the fixing seat 19 is stable in the mountain body 1, which improves the stability of the support rod 6 under the impact of rolling stones.

[0037] This utility model encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this utility model. To provide the public with a thorough understanding of this utility model, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand this utility model even without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of this utility model, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0038] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A roadbed structure for a tunnel entrance crossing an existing railway line, characterized in that, The method is applied to the mountain above the existing tunnel, where the foundation road surface is formed by excavation inside the mountain. The roadbed structure is constructed on the road surface and includes a support rod fixed to the top of the mountain and a protective net installed on the support rod. A lifting frame is slidably sleeved on the support rod, and a fixed seat is provided on one side of the support rod. A second positioning cone inserted into the mountain is fixed at the bottom end of both the fixed seat and the support rod, and a load-bearing rod is rotatably installed between the fixed seat and the lifting frame.

2. The roadbed structure at the entrance of a tunnel crossing an existing railway line according to claim 1, characterized in that, The top of the mountain is marked with the original ground line above the road surface, and a temporary drainage ditch is constructed on the mountain.

3. The roadbed structure at the entrance of a tunnel crossing an existing railway line according to claim 1, characterized in that, The top of the foundation road surface is provided with an additional layer, and drainage ditches are installed at both ends of the foundation road surface.

4. The roadbed structure at the entrance of a tunnel crossing an existing railway line according to claim 1, characterized in that, Multiple baffles are fixed at equal intervals on the inclined side of the mountain. A first positioning cone embedded in the mountain is fixed at the bottom of the side wall of each baffle. A track door is provided on the side wall of the existing track.

5. The roadbed structure at the entrance of a tunnel crossing an existing railway line according to claim 1, characterized in that, The support rod has multiple grooves at equal intervals, and the ropes on the protective net are embedded and wound in the grooves.

6. The roadbed structure at the entrance of a tunnel crossing an existing railway line according to claim 5, characterized in that, The support rod has multiple through holes opened laterally on its side wall, and multiple mounting holes connected to the through holes are opened longitudinally on the support rod.

7. The roadbed structure at the entrance of a tunnel crossing an existing railway line as described in claim 6, characterized in that, A connecting rod is tightly inserted between the multiple through holes, and a first bolt is embedded in the mounting hole.

8. The roadbed structure at the entrance of a tunnel crossing an existing railway line according to claim 7, characterized in that, The first bolt is slidably inserted into the connecting rod, and a nut is threaded onto one end of the first bolt that passes through the support rod.

9. The roadbed structure at the entrance of a tunnel crossing an existing railway line according to claim 1, characterized in that, The side wall of the lifting frame is threaded with a second bolt, which is tightly connected to the side wall of the support rod.

10. The roadbed structure at the entrance of a tunnel crossing an existing railway line according to claim 9, characterized in that, Both the lifting frame and the fixed base are equipped with pins, and both ends of the load-bearing rod are rotatably connected to the pins.

Images