A tooling for controlling the position of longitudinally embedded waterstop in the low sidewall of a tunnel

Abstract

This utility model relates to the field of tunnel construction technology, specifically to a tooling for controlling the position of a longitudinally embedded waterstop in a tunnel sidewall. It includes multiple mounting base plates spaced longitudinally along the sidewall template. A reversible clamping mechanism is hinged to each mounting base plate. The clamping mechanism includes a first connecting rod and a second connecting rod. The first connecting rod includes a horizontal connecting rod and an L-shaped connecting rod connected to the horizontal connecting rod. The second connecting rod includes a concave connecting rod and a vertical connecting rod connected to the concave connecting rod. The end of the horizontal connecting rod away from the L-shaped connecting rod is hinged to the mounting base plate. The horizontal part of the L-shaped connecting rod is hinged to one end of the concave connecting rod. When both the vertical part of the L-shaped connecting rod and the vertical connecting rod are rotated to the vertical direction, the vertical part of the L-shaped connecting rod and the vertical connecting rod are parallel and close to each other to form a clamping opening for holding the embedded waterstop. This tooling has a simple structure, is easy to operate, and is reusable. It can effectively control the height, center position, and alignment of the waterstop, preventing damage to the waterstop during construction.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, specifically to a tooling for controlling the position of the longitudinal embedded waterstop in the low sidewall of a tunnel. Background Technology

[0002] In tunnel construction, the installation quality of the longitudinal embedded waterstop in the sidewall directly affects the tunnel's waterproofing effect and service life. As a crucial component of the tunnel's secondary lining structure, the sidewall typically requires embedded waterstops at its longitudinal construction joints to enhance the joint's sealing and durability. Currently, the common practice on construction sites is to weld steel bar ends onto the sidewall formwork, tighten the waterstop using a tensioner, and then fix it with the steel bar ends. This method has significant drawbacks: First, the center position and alignment of the waterstop are difficult to control. Fixing the waterstop with steel bar ends is highly dependent on the processing length of the steel bar ends and the welder's skill level. For example, inconsistent weld lengths can cause the waterstop's installation position to shift laterally, resulting in an uneven and unsightly alignment. Second, when fixing the waterstop with steel bar ends, the steel bar ends directly contact the waterstop, easily scratching or puncturing it. Third, since the steel bar ends used to fix the waterstop are directly welded on and not removed later, they are not structural reinforcement but rather temporary reinforcement by the construction unit, thus increasing the construction unit's steel reinforcement costs. Therefore, there is an urgent need for a special tool that can accurately control the position of the waterstop, protect the integrity of the waterstop, and reduce construction costs. Utility Model Content

[0003] The purpose of this utility model is to provide a tooling for controlling the position of the longitudinal embedded waterstop in the low sidewall of a tunnel, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a tooling for controlling the position of a longitudinally embedded waterstop in a tunnel low sidewall, comprising multiple mounting base plates spaced longitudinally along the low sidewall template. A rotatable clamping mechanism is hinged to the mounting base plate. The clamping mechanism includes a first connecting rod and a second connecting rod. The first connecting rod includes a horizontal connecting rod and an L-shaped connecting rod connected to the horizontal connecting rod. The second connecting rod includes a concave connecting rod and a vertical connecting rod connected to the concave connecting rod. The end of the horizontal connecting rod away from the L-shaped connecting rod is hinged to the mounting base plate. The horizontal portion of the L-shaped connecting rod is hinged to one end of the concave connecting rod. When both the vertical portion of the L-shaped connecting rod and the vertical connecting rod are rotated to the vertical direction, the vertical portion of the L-shaped connecting rod and the vertical connecting rod are parallel and close to each other to form a clamping opening for holding the embedded waterstop.

[0005] Preferably, the first connecting rod can rotate 90° around its hinge point with the mounting base plate, so that the L-shaped connecting rod is in a state parallel to the mounting base plate, and the second connecting rod can rotate 90° around its hinge point with the first connecting rod, so that the vertical connecting rod is parallel to the vertical part of the L-shaped connecting rod.

[0006] Preferably, the mounting base plate is a perforated steel plate with a length of 150-250mm, a width of 80-120mm, and a thickness of 8-12mm.

[0007] Preferably, multiple mounting base plates are arranged at intervals of 2-3m along the longitudinal direction of the low side wall template.

[0008] Preferably, the mounting base plate is fixedly welded to the low side wall template.

[0009] Preferably, the horizontal connecting rod and the mounting base plate, as well as the L-shaped connecting rod and the concave connecting rod, are all hinged by bolts.

[0010] Preferably, the length of the horizontal connecting rod is 300-340mm.

[0011] Preferably, the width of the vertical connecting rod is 25-35mm.

[0012] Compared with existing technologies, this utility model provides a tooling for controlling the position of longitudinally embedded waterstops in tunnel sidewalls, which has the following advantages: This utility model achieves precise control of the height, center position, and alignment of the waterstop through a flip-up clamping mechanism set on the sidewall template, ensuring the straightness and horizontality of the waterstop installation; the clamping method for fixing the waterstop avoids physical damage to the waterstop caused by traditional rebar fixing methods, significantly improving the integrity and waterproofing reliability of the waterstop; this tooling is reusable, reducing the amount of reinforcing steel used and lowering construction costs. It is also easy to operate, highly efficient, and has good economic and environmental benefits, making it suitable for widespread application in various tunnel construction projects. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 This is a schematic diagram of the installation process of this utility model.

[0014] Explanation of reference numerals in the attached drawings: 1. Short side wall formwork; 2. Mounting base plate; 3. Clamping mechanism; 31. First connecting rod; 311. Horizontal connecting rod; 312. L-shaped connecting rod; 32. Second connecting rod; 321. Concave connecting rod; 322. Vertical connecting rod; 4. Waterstop; 5. Bolt; 6. Inverted arch trestle. Detailed Implementation

[0015] The technical solutions of the present utility model will now be described with reference to the accompanying drawings in the embodiments of the present utility model: like Figure 1-3As shown, this utility model provides a tooling for controlling the position of a longitudinally embedded waterstop in a tunnel sidewall, comprising multiple mounting base plates 2 spaced longitudinally along the sidewall template 1. The mounting base plate 2 is a perforated steel plate with a length L1 of 150-250mm (preferably 200mm), a width L2 of 80-120mm (preferably 100mm), and a thickness of 8-12mm (preferably 10mm). This size design balances the strength and welding stability of the mounting base plate 2, ensuring no displacement or deformation during concrete pouring. The mounting base plate 2 is fixed to the sidewall template 1 by welding. During welding, it is essential to ensure a full weld without slag inclusions, and care should be taken to avoid damage to the sidewall template 1 caused by high welding temperatures. Multiple mounting base plates 2 are arranged longitudinally along the sidewall template 1 at intervals of 2-3m. This interval can be appropriately adjusted according to the length of the sidewall and the material properties of the waterstop 4 in the actual project to ensure effective clamping and linear control of the waterstop 4.

[0016] Each mounting base plate 2 is hinged with a flip-up clamping mechanism 3, which includes a first connecting rod 31 and a second connecting rod 32. The first connecting rod 31 includes a horizontal connecting rod 311 and an L-shaped connecting rod 312 connected to the horizontal connecting rod 311; the second connecting rod 32 includes a concave connecting rod 321 and a vertical connecting rod 322 connected to the concave connecting rod 321. The end of the horizontal connecting rod 311 away from the L-shaped connecting rod 312 is hinged to the mounting base plate 2 by bolts 5, so that the first connecting rod 31 can rotate around the hinge point. The horizontal part of the L-shaped connecting rod 312 is also hinged to one end of the concave connecting rod 321 by bolts 5, so that the second connecting rod 32 can rotate relative to the first connecting rod 31.

[0017] When both the vertical portion of the L-shaped connecting rod 312 and the vertical connecting rod 322 are rotated to the vertical direction, the vertical portion of the L-shaped connecting rod 312 and the vertical connecting rod 322 in the second connecting rod 32 are parallel and close to each other to form a clamp for holding the embedded waterstop 4. The width of this clamp can be finely adjusted by adjusting the rotation angle of the second connecting rod 32 to accommodate waterstops of different specifications and ensure uniform clamping force, avoiding excessive local stress that could damage the waterstop.

[0018] The horizontal connecting rod 311 and the mounting base plate 2, as well as the L-shaped connecting rod 312 and the concave connecting rod 321, are all hinged by bolts 5, which facilitates the flipping and fixing of the clamping mechanism and makes operation simple.

[0019] The horizontal connecting rod 311 has a length of L3, which is 300-340mm (preferably 320mm). This length ensures sufficient adjustment range for the clamp while avoiding impact on operation or structural stability due to excessive length. The vertical connecting rod 322 has a width of L4, which is 25-35mm (preferably 30mm). This ensures strength while minimizing interference with concrete pouring.

[0020] In actual operation, the clamping mechanism 3 can be flipped: the first connecting rod 31 can be rotated 90° around its hinge point with the mounting base plate 2, so that the L-shaped connecting rod 312 is parallel to the mounting base plate 2; the second connecting rod 32 can be rotated 90° around its hinge point with the L-shaped connecting rod 312 of the first connecting rod 31, so that the vertical connecting rod 322 and the vertical part of the L-shaped connecting rod 312 are parallel to each other to form a clamping jaw. This design not only facilitates quick adjustment of the clamping jaw position to clamp the waterstop 4 during construction, but also facilitates flipping the entire clamping mechanism 3 to a storage state parallel to the low side wall formwork 1 after the concrete is poured, and avoids affecting the forward movement of the inverted arch trestle 6 and subsequent construction, significantly improving the reusability of the tooling and construction efficiency.

[0021] During construction, such as Figure 3 As shown, first, install the low side wall template 1, and tighten the waterstop 4 at the working face end using a tensioner to eliminate any looseness. Next, operate the clamping mechanism 3 point by point: First, hinge the horizontal connecting rod 311 of the first connecting rod 31 to the mounting base plate 2 using a bolt 5, ensuring that the first connecting rod 31 can rotate relative to the mounting base plate 2; rotate the first connecting rod 31 downwards by approximately 90°, so that the L-shaped connecting rod 312 is in a roughly horizontal state; then install another bolt 5 between the horizontal connecting rod 311 and the mounting base plate 2 to lock this position, preventing the first connecting rod 31 from continuing to rotate; hinge the concave connecting rod 321 of the second connecting rod 32 to the L-shaped connecting rod 312 using a bolt 5, adjust the second connecting rod 32 so that the vertical connecting rod 322 is parallel and aligned with the vertical part of the L-shaped connecting rod 312, forming a clamp; after inserting the waterstop 4 into the clamp, tighten all bolts 5 to complete the fixation. This operation can be performed point by point, making construction convenient and allowing for easy adjustment of the elevation, center position, and alignment of the waterstop 4 to ensure its straightness and levelness. After the concrete pouring of the low side wall is completed and reaches the demolding strength, loosen all bolts 5 and flip the clamping mechanism 3 to a retracted state parallel to the low side wall formwork 1 to avoid affecting the forward movement of the inverted arch trestle 6 and the construction of the next slab. This tooling can be retained on the low side wall formwork 1 for repeated use, significantly reducing the amount of reinforcing steel used, lowering construction costs, and improving construction efficiency and waterproofing quality.

[0022] This utility model achieves the clamping of the embedded waterstop by setting up a flip-out clamping mechanism and mounting base plate, which fundamentally ensures that the waterstop is embedded without damage, accurately positioned, and straight. This tooling not only significantly improves the waterproof reliability of tunnel lining construction joints and effectively avoids the high maintenance costs caused by leakage, but also greatly reduces the amount of steel reinforcement used in traditional processes due to its reusability, thus reducing construction costs. The overall structure is reasonable, easy to operate, and has high construction efficiency, and has high practical value and promotion prospects.

[0023] The above embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

Claims

1. A tooling for controlling the position of a longitudinally embedded waterstop in a tunnel sidewall, characterized in that: The system includes multiple mounting base plates (2) spaced longitudinally along the low side wall template (1). Each mounting base plate (2) is hinged with a reversible clamping mechanism (3). The clamping mechanism (3) includes a first connecting rod (31) and a second connecting rod (32). The first connecting rod (31) includes a horizontal connecting rod (311) and an L-shaped connecting rod (312) connected to the horizontal connecting rod (311). The second connecting rod (32) includes a concave connecting rod (321) and a connecting rod to the concave connecting rod (321). The vertical connecting rod (322) is hinged to the mounting base plate (2) at one end of the horizontal connecting rod (311) away from the L-shaped connecting rod (312). The horizontal part of the L-shaped connecting rod (312) is hinged to one end of the concave connecting rod (321). When the vertical part of the L-shaped connecting rod (312) and the vertical connecting rod (322) are both rotated to the vertical direction, the vertical part of the L-shaped connecting rod (312) and the vertical connecting rod (322) are parallel and close to each other to form a clamp for holding the embedded waterstop (4).

2. The tooling for controlling the position of the longitudinally embedded waterstop in the tunnel sidewall according to claim 1, characterized in that: The first connecting rod (31) can rotate 90° around its hinge point with the mounting base plate (2) so that the L-shaped connecting rod (312) is in a state parallel to the mounting base plate (2). The second connecting rod (32) can rotate 90° around its hinge point with the first connecting rod (31) so that the vertical connecting rod (322) is parallel to the vertical part of the L-shaped connecting rod (312).

3. The tooling for controlling the position of the longitudinally embedded waterstop in the tunnel sidewall according to claim 1, characterized in that: The mounting base plate (2) is a perforated steel plate with a length of 150-250mm, a width of 80-120mm, and a thickness of 8-12mm.

4. The tooling for controlling the position of the longitudinally embedded waterstop in the tunnel sidewall according to claim 1, characterized in that: Multiple mounting base plates (2) are set at intervals of 2-3m along the longitudinal direction of the low side wall template (1).

5. The tooling for controlling the position of the longitudinally embedded waterstop in the tunnel sidewall according to claim 1, characterized in that: The mounting base plate (2) is fixedly welded to the low side wall template (1).

6. The tooling for controlling the position of the longitudinally embedded waterstop in the tunnel sidewall according to claim 1, characterized in that: The horizontal connecting rod (311) and the mounting base plate (2), as well as the L-shaped connecting rod (312) and the concave connecting rod (321), are all hinged by bolts (5).

7. The tooling for controlling the position of the longitudinally embedded waterstop in the tunnel sidewall according to claim 1, characterized in that: The length of the horizontal connecting rod (311) is 300-340mm.

8. The tooling for controlling the position of the longitudinally embedded waterstop in the tunnel sidewall according to claim 1, characterized in that: The width of the vertical connecting rod (322) is 25-35mm.

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