Chamfer leakage-proof device for tunnel secondary lining

Abstract

The utility model discloses a tunnel secondary lining chamfer anti-leakage device, which belongs to the technical field of tunnel construction and comprises a steel template detachably mounted between a concrete ground and a secondary lining trolley movable template and a plurality of herringbone support structures detachably mounted at a tunnel blind ditch. The herringbone supporting structures are connected with the steel formwork through the connecting rods respectively, and the two ends of the connecting rods are detachably connected with the front faces of the herringbone supporting structures and the back face of the steel formwork respectively. When the secondary lining chamfering template is used for secondary lining chamfering construction, a traditional wood template is replaced, the sealing performance and the fixing stability can be effectively improved, and the secondary lining chamfering template has the advantage of being convenient to disassemble and assemble.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, and in particular to a tunnel secondary lining chamfering leak-proof device. Background Technology

[0002] In existing technology, the secondary lining trolley is equipped with a movable template approximately 15cm high, controlled and secured by screw rods. During the chamfering construction of the secondary lining, the movable template is fixed at the chamfer position. For example... Figure 1 As shown, due to the superelevation section of the tunnel design, when the tunnel cross slope reaches 4%, the movable formwork cannot cover an area of ​​approximately 15cm in height. For areas not covered by the movable formwork, the current practice is to fill the gaps with wooden formwork. However, this method suffers from poor sealing between the wooden formwork and the movable formwork of the secondary lining trolley, leading to grout leakage and misalignment at the chamfered edges of the secondary lining during construction. This results in uneven longitudinal and circumferential lines at the chamfered edges, resulting in poor appearance quality. More seriously, the wooden formwork is prone to instability; during pouring, the formwork expands under the pressure of the concrete, causing the secondary lining to exceed the construction limits, requiring removal and rework, thus wasting costs. Furthermore, the wooden formwork is fixed to the concrete ground on one side of the tunnel's blind ditch, requiring piling for fixation, making disassembly and assembly inconvenient and time-consuming. Utility Model Content

[0003] This utility model proposes a leak-proof device for the chamfering of tunnel secondary lining, which solves the problems of poor sealing, unstable fixing, and inconvenient disassembly and assembly caused by the use of wooden templates in conjunction with the movable templates of the secondary lining trolley during the chamfering construction.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A tunnel secondary lining chamfering leak-proof device includes a steel formwork for detachable installation between the concrete ground and the movable formwork of the secondary lining trolley, and several herringbone support structures for detachable installation at the tunnel blind ditch. The several herringbone support structures are respectively connected to the steel formwork by several connecting rods, and the two ends of the connecting rods are detachably connected to the front of the herringbone support structure and the back of the steel formwork, respectively.

[0006] Furthermore, the steel template is rectangular, and sealing strips are provided on both its top and bottom surfaces. The length of the sealing strips and the length of the steel template are both equal to the length of the movable template of the secondary lining trolley.

[0007] Furthermore, the height of the sealing strip is 0.5-1.5cm, and the thickness of the steel template is 0.8-1.2cm.

[0008] Furthermore, the back of the steel template is provided with several connectors corresponding to several connecting rods, and the connectors are spaced apart and located at the same height. Each connector includes a mounting base and an arc-shaped limiting strip. The mounting base is fixedly connected to the steel template and is cylindrical, with its axis parallel to the length direction of the steel template. One end of the connecting rod is provided with a sphere, and the inner diameter of the mounting base matches the outer diameter of the sphere. One end of the mounting base is an open end, and the other end is a closed end. The open end has a slit along the axial direction for the connecting rod to pass through and swing up and down. The arc-shaped limiting strip is located on one side of the open end of the mounting base. One end of the strip is hinged to the mounting base, and the other end is detachably connected to the mounting base by a locking bolt. The arc-shaped limiting strip encloses the slit to form a limiting area for restricting the left and right translation of the connecting rod. The length of the limiting area is equal to the outer diameter of the mounting base.

[0009] Furthermore, the spacing between two adjacent connectors is 150-250cm.

[0010] Furthermore, the length of the mounting base is 4-8cm.

[0011] Furthermore, the outer arc length of the cut is 1 / 4 to 1 / 3 of the outer circumference of the mounting base.

[0012] Furthermore, the herringbone support structure includes a vertical support column for inserting into the tunnel blind ditch and abutting against the far sidewall of the tunnel blind ditch, and an inclined support column connected to the upper end of the vertical support column. One side of the vertical support column is detachably connected to the connecting rod, and its opposite side is connected to the inclined support column. The lower end of the inclined support column is connected to the concrete ground.

[0013] Furthermore, the vertical support column has multiple adjustment holes arranged from bottom to top in the middle, and one end of the connecting rod is detachably connected to one of the adjustment holes by an adjustment bolt.

[0014] Furthermore, the vertical support is a channel steel, and the adjustment hole is opened on the side wall of the channel steel.

[0015] By adopting the above technical solution, this utility model has the following beneficial effects:

[0016] This invention uses steel formwork instead of traditional wooden formwork, improving the mechanical strength of the formwork. Sealing strips made of rubber are installed on both the top and bottom surfaces of the steel formwork, providing elasticity and filling gaps between the steel formwork and the concrete floor and the movable formwork of the secondary lining trolley, thus improving sealing and preventing grout leakage. The steel formwork is connected to several herringbone support structures via connecting rods, providing good installation stability. These herringbone support structures are installed at the tunnel blind drain, using the sidewalls of the blind drain for support and reinforcement, and are easy to assemble and disassemble. Compared to existing technologies, this invention offers advantages such as better sealing, higher stability, and easier assembly and disassembly. Attached Figure Description

[0017] Figure 1 Schematic diagram of tunnel cross slope design;

[0018] Figure 2 This is a schematic diagram of the installation of the tunnel secondary lining chamfering leak-proof device proposed in Embodiment 1 of this utility model;

[0019] Figure 3 This is a rear view of the steel formwork proposed in Embodiment 1 of this utility model;

[0020] Figure 4 This is a schematic diagram of the connection between the connector and the connecting rod according to Embodiment 1 of this utility model. Figure 1 ;

[0021] Figure 5 This is a schematic diagram of the connection between the connector and the connecting rod according to Embodiment 1 of this utility model. Figure 2 ;

[0022] Figure 6 This is a schematic diagram of the connection between the connector and the connecting rod according to Embodiment 1 of this utility model. Figure 3 ;

[0023] The components in the attached diagram are labeled as follows: 1-steel formwork, 2-sealing strip, 3-connector, 4-mounting seat, 5-cutout, 6-arc-shaped limit strip, 7-hinge, 8-locking bolt, 9-connecting rod, 10-sphere, 11-vertical support, 12-inclined support, 13-adjusting hole, 14-adjusting bolt, 15-concrete ground, 16-tunnel blind drain. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1

[0026] like Figure 2-6 As shown, a tunnel secondary lining chamfering leak-proof device includes a steel formwork 1 for detachable installation between a concrete ground 15 and a movable formwork of a secondary lining trolley, and several herringbone support structures for detachable installation at a tunnel blind ditch 16. The several herringbone support structures are connected to the steel formwork 1 by several connecting rods 9, and the two ends of the connecting rods 9 are detachably connected to the front of the herringbone support structure and the back of the steel formwork 1, respectively.

[0027] The steel formwork 1 is rectangular, with sealing strips 2 on both its top and bottom surfaces. The length of the sealing strips 2 and the length of the steel formwork 1 are both equal to the length of the movable formwork of the secondary lining trolley. The height of the sealing strips 2 is 0.5-1.5 cm, and the thickness of the steel formwork 1 is 0.8-1.2 cm. In this embodiment, the height of the sealing strips 2 is 1.0 cm, the thickness of the sealing strips 2 is the same as that of the steel formwork 1, the thickness of the steel formwork 1 is 1.0 cm, and the length of the steel formwork 1 is 12 meters.

[0028] On the back of the steel template 1, several connectors 3 are provided corresponding to several connecting rods 9. These connectors 3 are spaced apart and located at the same height. The distance between two adjacent connectors 3 is 150-250cm. In this embodiment, the distance between two adjacent connectors 3 is 200cm. Each connector 3 includes a mounting base 4 and an arc-shaped limiting strip 6. The mounting base 4 is fixedly connected to the steel template 1, and its length is 4-8cm. In this embodiment, the length of the mounting base 4 is 5cm. The mounting base 4 is cylindrical, and its axis is parallel to the length direction of the steel template 1. One end of the connecting rod 9 is provided with a ball 10, and the inner diameter of the mounting base 4 matches the outer diameter of the ball 10. One end of the mounting base 4 is an open end, and the other end is a closed end. The open end has a slit 5 along the axial direction for the connecting rod 9 to pass through and swing up and down. The outer arc length of the slit 5 is 1 / 4-1 / 3 of the outer circumference of the mounting base 4. In this embodiment, the outer arc length of the slit 5 is 1 / 3 of the outer circumference of the mounting base 4.

[0029] An arc-shaped limiting strip 6 is located on one side of the open end of the mounting base 4. One end of the strip is hinged to the mounting base 4 via a hinge 7, and the other end is detachably connected to the mounting base 4 via a locking bolt 8. The arc-shaped limiting strip 6 encloses the cutout 5 to form a limiting area for restricting the left and right translation of the connecting rod 9. The length of the limiting area is equal to the outer diameter of the mounting base 4.

[0030] In use, first open the arc-shaped limiting strip 6, then insert the ball 10 at one end of the connecting rod 9 into the open end of the mounting base 4 and move it towards the closed end. The connecting rod 9 passes through the cut 5. When the ball 10 and the connecting rod 9 move to the innermost side, lower the arc-shaped limiting strip 6 and lock it with the locking bolt 8 to prevent the ball 10 and the connecting rod 9 from slipping off. At this time, the ball 10 can rotate relative to the mounting base 4, and the connecting rod 9 can swing up and down, facilitating the connection of its other end to the A-frame support structure, providing a certain degree of adjustability.

[0031] The herringbone support structure includes a vertical support 11 for inserting into the tunnel blind ditch 16 and abutting against the far sidewall of the tunnel blind ditch 16, and an inclined support 12 connected to the upper end of the vertical support 11. One side of the vertical support 11 is detachably connected to the connecting rod 9, and its opposite side is connected to the inclined support 12. The lower end of the inclined support 12 is connected to the concrete ground 15.

[0032] Furthermore, the vertical support column 11 has multiple adjustment holes 13 arranged from bottom to top in the middle. One end of the connecting rod 9 is detachably connected to one of the adjustment holes 13 via an adjustment bolt 14, allowing adjustment of the height of the end of the connecting rod 9 connected to the vertical support column 11, thereby adjusting the inclination of the connecting rod 9. In this embodiment, the vertical support column 11 is a channel steel, and the adjustment holes 13 are formed on the side wall of the channel steel.

[0033] This invention uses a steel formwork 1 instead of the traditional wooden formwork, improving the mechanical strength of the formwork. Both the top and bottom surfaces of the steel formwork 1 are equipped with sealing strips 2 made of rubber, which have a certain degree of elasticity and can fill the gaps between the steel formwork 1 and the concrete ground 15 and the movable formwork of the secondary lining trolley, improving sealing and ensuring that the concrete pouring formwork is installed flat and densely, avoiding grout leakage. The steel formwork 1 is connected to several herringbone support structures via several connecting rods 9, providing good installation stability. These herringbone support structures are installed at the tunnel blind ditch 16, using the sidewalls of the tunnel blind ditch 16 for support and reinforcement, and are easy to assemble and disassemble. Compared with existing technologies, this invention has the advantages of good sealing, high stability, and convenient assembly and disassembly.

[0034] The above description is a detailed description of the preferred embodiments of the present utility model. However, the embodiments are not intended to limit the scope of the patent application of the present utility model. All equivalent changes or modifications made under the technical spirit of the present utility model should fall within the patent scope covered by the present utility model.

Claims

1. A tunnel secondary lining chamfering leak-proof device, characterized in that: It includes a steel formwork for detachable installation between the concrete ground and the movable formwork of the secondary lining trolley, and several herringbone support structures for detachable installation at the tunnel blind ditch. The herringbone support structures are connected to the steel formwork by several connecting rods, and the two ends of the connecting rods are detachably connected to the front of the herringbone support structure and the back of the steel formwork, respectively.

2. The tunnel secondary lining chamfering leak-proof device according to claim 1, characterized in that, The steel template is rectangular, and sealing strips are provided on its top and bottom surfaces. The length of the sealing strips and the length of the steel template are both equal to the length of the movable template of the secondary lining trolley.

3. The tunnel secondary lining chamfering leak-proof device according to claim 2, characterized in that, The height of the sealing strip is 0.5-1.5cm, and the thickness of the steel template is 0.8-1.2cm.

4. The tunnel secondary lining chamfering leak-proof device according to claim 3, characterized in that, The back of the steel template is provided with several connectors corresponding to several connecting rods. These connectors are spaced apart and located at the same height. Each connector includes a mounting base and an arc-shaped limiting strip. The mounting base is fixedly connected to the steel template and is cylindrical, with its axis parallel to the length direction of the steel template. One end of each connecting rod has a sphere, and the inner diameter of the mounting base matches the outer diameter of the sphere. One end of the mounting base is open, and the other end is closed. The open end has a slit along the axial direction for the connecting rod to pass through and swing up and down. The arc-shaped limiting strip is located on one side of the open end of the mounting base. One end of the strip is hinged to the mounting base, and the other end is detachably connected to the mounting base via a locking bolt. The arc-shaped limiting strip encloses the slit to form a limiting area for restricting the left and right translation of the connecting rod. The length of the limiting area is equal to the outer diameter of the mounting base.

5. A tunnel secondary lining chamfering leak-proof device according to claim 4, characterized in that, The spacing between two adjacent connectors is 150-250cm.

6. A tunnel secondary lining chamfering leak-proof device according to claim 4, characterized in that, The length of the mounting base is 4-8cm.

7. A tunnel secondary lining chamfering leak-proof device according to claim 4, characterized in that, The outer arc length of the cut is 1 / 4 to 1 / 3 of the outer circumference of the mounting base.

8. A tunnel secondary lining chamfering leak-proof device according to claim 4, characterized in that, The herringbone support structure includes a vertical support column for inserting into the tunnel blind ditch and abutting against the far sidewall of the tunnel blind ditch, and an inclined support column connected to the upper end of the vertical support column. One side of the vertical support column is detachably connected to the connecting rod, and its opposite side is connected to the inclined support column. The lower end of the inclined support column is connected to the concrete ground.

9. A tunnel secondary lining chamfering leak-proof device according to claim 8, characterized in that, The vertical support column has multiple adjustment holes from bottom to top in the middle, and one end of the connecting rod is detachably connected to one of the adjustment holes by an adjustment bolt.

10. A tunnel secondary lining chamfering leak-proof device according to claim 9, characterized in that, The vertical support is a channel steel, and the adjustment hole is opened on the side wall of the channel steel.

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