The invention belongs to the technical field of high-altitude operations, and particularly relates to a CG-3 tunnel arch
abutment establishing vehicle. The vehicle comprises a
vehicle frame, a chassiswalking
system, a driving roof, an operation platform
control system, main arm assemblies, hydraulic supporting legs, an operation platform and a hydraulic fixture
assembly; three main arm assembliesare arranged on a front
vehicle frame side by side, the main arm assemblies swing in four directions, rear supporting seats of the main arm assemblies are connected with the front
vehicle frame, front supporting seats of the main arm assemblies are connected with the operation platform and the hydraulic fixture
assembly, and dual triangular hydraulic horizontal moving mechanisms are installed onthe main arm assemblies; the hydraulic fixture
assembly is composed of a fixture horizontal moving supporting arm, a horizontal moving pull rod oil cylinder and a clamping head, the fixture horizontalmoving supporting arm and the front end of the horizontal moving pull rod oil cylinder are connected with the clamping head, and a
parallelogram mechanism is formed by the fixture horizontal moving supporting arm, the horizontal moving pull rod oil cylinder, the front supporting seats of the main arm assemblies and the clamping head.