Tunnel Inverted Arch Trestle Bridge in Tunnel Projects Role

The tunnel inverted arch trestle plays a crucial role in tunneling projects by providing a temporary support structure for construction activities. 

Tunnel Inverted Arch Trestle Bridge in Tunnel Projects Role

Modular Assembly and Transportation

The tunnel invert arch trestle is designed with a modular structure, allowing for quick assembly and disassembly. This design facilitates easy transportation to the construction site. The trestle is typically made of steel beams and plates, providing high strength and stability.

Positioning and Erection

Before erection, the foundation is cleaned and leveled. The odolites and spirit levels are used to ensure accurate positioning and alignment. The trestle is  assembled on-site and positioned using cranes. The main bridge section is formed by welding longitudinal and cross beams, providing a robust structure.

Hydraulic and Mechanical Operations

The trestle operates using a hydraulic system, which allows for flexible movement and precise control. It can move longitudinally and laterally using drive motors and lifting cylinders. The hydraulic system also enables the trestle to adjust its height and position according to the tunnel’s geometry.

Support During Invert Construction

The trestle provides support for the invert arch construction. It allows for excavation, reinforcement binding, and concrete pouring without obstructing other construction activities. The trestle can be moved forward or backward as needed, ensuring continuous construction progress.

Safety and Stability

The trestle’s design ensures high construction safety. Its large bearing capacity and stable structure protect construction vehicles and workers. The trestle can also retract or move across pits to avoid blasting debris and maintain stability.