Functions

The U-shaped pipe-jacking machine integrates mobile shield tunneling support technology with high-precision gantry assembly technology. It consolidates multiple functions including excavation, U-shield protection, pipe-jacking assembly, conveyer discharge, graded gravel pre-replacement for soft foundations, bedding layer paving, oblique support for stabilized advancement, synchronous road backfilling, and emergency drainage. It can achieve integrated intelligent control of the entire workflow for utility tunnels and box culvert projects, including foundation pit support, excavation, spoil removal, ground pre-replacement, equipment jacking, bedding layer paving, box culvert or utility tunnel assembly, side seam filling, and synchronous road backfilling and restoration.

The equipment is suitable for conventional comprehensive utility tunnel projects as well as box culvert construction under complex geological conditions such as water-rich weak strata, sandy silty clay, and miscellaneous fill, meeting the high-precision installation requirements for large-section box culverts. It is also equipped with specialized functions, including automatic bedding spreading, synchronized green filling of tunnel side joints, precise tunnel assembly, adaptive adjustment for varying chamber sizes and diameters, and rapid site transition operations. Furthermore, it can operate under adverse weather conditions and is suitable for various municipal utility tunnel and box culvert renovation projects using shallow open-cut prefabricated assembly or underground open-cut prefabricated assembly methods, providing innovative mechanized and intelligent construction equipment, along with comprehensive construction techniques for related projects.

Applicable Projects

Open-cut precast assembly projects for shallow-to-medium-depth underground structures,
including utility tunnels,
open channel renovation projects,
pipeline installation,
and open-cut tunnel portal sections