Cross-Passage Jacking System With Space-Saving Reaction Frame

The patent extracts and eliminates the ground-freezing process from the construction methodology, transitioning to a mechanical jacking system that directly excavates and supports the cross passage without freezing the ground. This removes the source of frost heave and immersion problems while maintaining excavation capability in groundwater conditions through immediate mechanical support of excavated segments.

The patent replaces the thermal ground-freezing system with a mechanical jacking and support system. Instead of using thermal fields to stabilize ground for excavation, the invention uses mechanical jacking forces and immediate segmental support structures to enable safe excavation and support the cross passage, eliminating thermal-induced ground damage.

The patent employs preliminary action by pre-assembling segmental support structures and jacking systems before excavation begins. The modular segments are prepared in advance and can be immediately installed as excavation progresses, eliminating the need for prolonged ground-freezing preparation time and enabling continuous construction operations.

The patent ensures continuity of useful action through a continuous jacking and excavation process where segments are excavated, supported, and jacked forward without interruption. The mechanical support system remains continuously engaged during excavation, eliminating the idle freezing period required by mining methods and maintaining constant construction progress.

The patent applies segmentation by dividing the support structure into modular, detachable segments that can be assembled in place within the tunnel. Instead of using a single massive support structure, the invention uses multiple smaller segmental units that provide equivalent support strength while being much easier to manufacture, transport, and assemble, significantly reducing equipment mass and manufacturing costs.

The patent employs nesting by designing segmental support structures that can be nested or stacked within each other, allowing compact storage and transport of support components. The modular segments fit together like nested dolls, enabling the provision of strong support for large-diameter tunnels while keeping individual component sizes manageable and manufacturing costs low.

The patent uses segmentation to replace the continuous full-ring support structure with discrete segmental units spaced along the tunnel. These segmented support structures maintain tunnel stability through distributed support points while leaving gaps between segments that allow vehicle passage and communication between different construction sites, eliminating the space occupation problem of continuous support.

The patent inverts the conventional approach by providing support after excavation rather than before, using the jacked segments themselves as the support structure. Instead of installing a full-ring support that occupies space, the invention excavates first and then installs minimal segmental support only where needed, reversing the sequence and reducing space occupation while maintaining stability.

The patent applies segmentation to divide the construction process into independent modular segments that can be worked on simultaneously by multiple teams. Each segment can be excavated, supported, and jacked independently, allowing parallel construction of multiple cross passages or different sections of the same passage, dramatically improving productivity and construction efficiency.

The patent uses preliminary action by preparing multiple sets of modular segments and jacking equipment in advance, enabling multiple construction processes to begin simultaneously without waiting for sequential completion. The pre-prepared modules allow different construction teams to work on different segments at the same time, eliminating the sequential bottleneck and improving overall construction efficiency.