Tunnel lining trolley soft lap joint structure

Abstract

The utility model relates to tunnel lining construction technical field discloses a kind of tunnel lining trolley soft lap joint structure, including fixed bolster and rubber strip, the fixed bolster is fixedly connected in the side of trolley formwork, the rubber strip is fixed on fixed bolster by fastening screw, when the trolley formwork is overlapped with existing lining, the rubber strip can be extruded on the surface of existing lining;The rubber strip is provided with extrusion and non-extrusion and adhesion part along the width direction and arranged side by side on the surface of being adhered with existing lining, the surface of non-extrusion and adhesion part is flush with trolley formwork end surface, and the extrusion and adhesion part projects to the non-extrusion and adhesion part.The tunnel lining trolley soft lap joint structure of the utility model can realize that rubber strip is completely extruded, avoid rubber strip protruding and affect forming quality.

Description

Technical Field

[0001] This utility model relates to the field of tunnel lining construction technology, and more specifically, to a flexible overlap structure for a tunnel lining trolley. Background Technology

[0002] During tunnel lining construction, the invert section is poured first, followed by the secondary lining. When constructing the secondary lining, to prevent grout leakage from the gap between the formwork and the existing lining, rubber strips are usually installed on one side of the formwork. These rubber strips are pressed against the existing lining to seal the gap, thus ensuring that no grout leakage occurs during concrete pouring.

[0003] However, in the aforementioned prior art, since the overlap between the trolley formwork and the existing lining cannot be perfectly aligned, either the trolley formwork and the existing lining have a spatial overlap area, making the existing lining easily cracked by the trolley formwork, thus forming a crescent-shaped defect; or the trolley formwork and the existing lining are far apart, and the rubber strip cannot be fully compressed, resulting in the rubber strip being exposed and protruding, which prevents the formed concrete from obtaining a regular shape. Utility Model Content

[0004] This invention addresses the concrete forming defects caused by the inability of rubber strips to be fully compressed in existing technologies by providing a soft overlapping structure for tunnel lining trolleys, which enables the rubber strips to be fully compressed and improves forming quality.

[0005] This utility model is achieved through the following technical solution:

[0006] A flexible overlap structure for a tunnel lining trolley includes a fixed bracket and a rubber strip. The fixed bracket is fixedly connected to one side of the trolley template, and the rubber strip is fixed to the fixed bracket by fastening screws. When the trolley template overlaps with the existing lining, the rubber strip can be squeezed against the surface of the existing lining. The rubber strip has a squeezed-fitting part and a non-squeezed-fitting part arranged side by side along the width direction on the surface of the rubber strip that is in contact with the existing lining. The surface of the non-squeezed-fitting part is flush with the end face of the trolley template, and the squeezed-fitting part protrudes from the non-squeezed-fitting part.

[0007] Optionally, the width of the extruded bonding portion is one-third to one-half the width of the rubber strip.

[0008] Optionally, the extruded bonding portion and the non-extruded bonding portion are connected by an arc transition.

[0009] Optionally, the thickness of the extruded bonding portion protruding from the non-extruded bonding portion is 5 mm.

[0010] Optionally, the fixed bracket is also provided with several adjustable top rods, the ends of which can press against the back of the rubber strip on the side where the compression fitting part is located.

[0011] Optionally, the fixed bracket is also provided with a hinge corresponding to the top rod. The hinge includes a fixed leaf and a movable leaf. The fixed leaf is fixedly connected to the fixed bracket, and the end of the top rod can abut against the movable leaf.

[0012] Optionally, a pad of the same length as the rubber strip is also provided on the back of the rubber strip, and the pad is located between the movable flap and the rubber strip.

[0013] The technical solution of this utility model has at least the following beneficial effects:

[0014] The flexible overlap structure of the tunnel lining trolley of this utility model, by using a compression bonding part and a non-compression bonding part on the side of the rubber strip, can ensure that the rubber strip is compressed without bulging even when the trolley template is far away from the existing lining, thus ensuring the flatness of the joint and improving the quality of concrete forming. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the flexible overlap structure of the tunnel lining trolley of this utility model.

[0016] Figure 2 for Figure 1 Enlarged view of part a.

[0017] Figure label:

[0018] 11-Fixed bracket, 12-Rubber strip, 121-Extrusion bonding part, 122-Non-extrusion bonding part, 13-Fasting screw, 14-Top rod, 15-Plate, 16-Hinge, 161-Moving leaf, 162-Fixed leaf, 20-Trolley template. Detailed Implementation

[0019] Reference Figures 1-2The tunnel lining trolley flexible overlap structure of this utility model includes a fixed bracket 11 and a rubber strip 12. The fixed bracket 11 is fixedly connected to one side of the trolley template 20. The fixed bracket 11 and the trolley template 20 can be connected by bolts or welding. A groove structure is reserved in the fixed bracket 11. The rubber strip 12 is fixed to the fixed bracket 11 by fastening screws 13. When the trolley template 20 overlaps with the existing lining, the rubber strip 12 can be squeezed against the surface of the existing lining. In this utility model, the rubber strip 12 has a squeeze-fitting part 121 and a non-squeeze-fitting part 122 arranged side by side along the width direction on the surface of the rubber strip 12 that is in contact with the existing lining. The surface of the non-squeeze-fitting part 122 is flush with the end face of the trolley template 20, and the squeeze-fitting part 121 protrudes from the non-squeeze-fitting part 122. By employing the structural arrangement of the compression-fitting part 121 and the non-compression-fitting part 122, even when the trolley template 20 is relatively far from the existing lining (here, "relatively far" is a relative concept, meaning that it cannot be flush and there is a certain distance), it can be ensured that the rubber strip 12 is compressed without bulging. This is because the compressed part is always the protruding compression-fitting part 121, while the non-compression-fitting part 122 is in contact with the existing lining and is not in a compressed state, so there is no bulging. This ensures the smoothness of the joint and improves the quality of concrete molding. Using the soft overlap structure of the tunnel lining trolley of this utility model, the distance between the trolley template 20 and the existing lining can be controlled more freely, as long as a certain distance is maintained.

[0020] The compression bonding portion 121 is one-third to one-half the width of the rubber strip 12, ensuring that the non-compression bonding portion 122 is wider, facilitating control of the trolley template 20. The compression bonding portion 121 and the non-compression bonding portion 122 are connected by an arc transition, reducing stress at the connection point. The compression bonding portion 121 protrudes 5mm from the non-compression bonding portion 122, ensuring basic sealing requirements.

[0021] Furthermore, the fixed bracket 11 is also equipped with several adjustable push rods 14. The ends of the push rods 14 can press against the back of the rubber strip 12 on the side where the compression bonding part 121 is located. The push rods 14 can be screws, and a fixing nut is arranged on the fixed bracket 11. Thus, when the screw is rotated, the end of the screw can be lifted up to ensure that the rubber strip 12 is lifted up. Since the rubber strip 12 is divided into the compression bonding part 121 and the non-compression bonding part 122, the width of the compression bonding part 121 is narrow, and its service life will be shortened when it wears. However, by setting the push rods 14, when the rubber strip 12 wears and the sealing performance decreases, the rubber strip 12 on the side of the compression bonding part 121 can be lifted up, thereby increasing the bonding area of ​​the compression bonding part 121, thus ensuring the sealing performance, and also increasing the service life of the rubber strip 12, avoiding frequent replacement.

[0022] The fixed bracket 11 is also equipped with a hinge 16 corresponding to the top rod 14. The hinge 16 includes a fixed leaf 162 and a movable leaf 161. The fixed leaf 162 is fixedly connected to the fixed bracket 11, and the end of the top rod 14 can abut against the movable leaf 161. By setting the hinge 16, on the one hand, the hinge 16 can be easily fixedly connected to the fixed bracket 11, which is low-cost and easy to operate in actual application; on the other hand, by the top rod 14 holding the movable leaf 161 of the hinge 16 and then pressing against the rubber strip 12, the contact stress of the top rod 14 can be dispersed.

[0023] A pad 15 of the same length as the rubber strip 12 is also provided on the back of the rubber strip 12. The pad 15 is located between the movable leaf 161 and the rubber strip 12. The pad 15 can be placed on the movable leaf 161 without being fixed. The pad 15 can further increase the contact area of ​​the rubber strip 12 to distribute stress.

Claims

1. A flexible overlap structure for a tunnel lining trolley, comprising a fixed bracket and a rubber strip, wherein the fixed bracket is fixedly connected to one side of the trolley template, and the rubber strip is fixed to the fixed bracket by fastening screws; when the trolley template overlaps with the existing lining, the rubber strip can be pressed against the surface of the existing lining; characterized in that, The rubber strip has a compression-fitting part and a non-compression-fitting part arranged side by side along the width direction on the surface that is in contact with the existing lining. The surface of the non-compression-fitting part is flush with the end face of the trolley template, and the compression-fitting part protrudes from the non-compression-fitting part.

2. The tunnel lining trolley flexible overlap structure according to claim 1, characterized in that, The width of the extruded bonding portion is one-third to one-half the width of the rubber strip.

3. The tunnel lining trolley flexible overlap structure according to claim 1, characterized in that, The extruded bonding portion and the non-extruded bonding portion are connected by an arc transition.

4. The tunnel lining trolley flexible overlap structure according to claim 1, characterized in that, The thickness of the extruded bonding portion protruding from the non-extruded bonding portion is 5mm.

5. The tunnel lining trolley flexible overlap structure according to claim 1, characterized in that, The fixed bracket is also provided with several adjustable top rods, the ends of which can press against the back of the rubber strip on the side where the compression fitting part is located.

6. The tunnel lining trolley flexible overlap structure according to claim 5, characterized in that, The fixed bracket is also provided with a hinge corresponding to the top rod. The hinge includes a fixed leaf and a movable leaf. The fixed leaf is fixedly connected to the fixed bracket, and the end of the top rod can abut against the movable leaf.

7. The tunnel lining trolley flexible overlap structure according to claim 6, characterized in that, A pad of the same length as the rubber strip is also provided on the back of the rubber strip, and the pad is located between the movable blade and the rubber strip.

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