Pipe-roof pre-constructed structure of mountain cave and pipe-roof construction method with back-off pipe
By designing the pipe jacking structure in segments with differentiated designs and creating a construction platform at the foot of the mountain slope, the problems of the inability of pipe jacking equipment to retract and the waste of materials in the construction of mountain caverns were solved, thus achieving a safe and economical construction method.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CCCC FIRST HIGHWAY CONSULTANTS CO LTD
- Filing Date
- 2026-05-28
- Publication Date
- 2026-07-17
AI Technical Summary
In the construction of caverns in mountains, traditional pipe jacking technology cannot achieve controllable retreat, resulting in delays in the construction period, high safety risks, and serious waste of materials. It is also unsuitable for construction scenarios with no receiving well, semi-filled and semi-excavated starting wells, and restrictions imposed by surrounding buildings.
The pipe jacking structure is divided into extended pipe sections and precast pipe sections. The extended pipe sections are empty pipes, while the precast pipe sections are equipped with reinforced concrete to form a permanent support structure. The working shaft is located at the foot of the mountain slope. A construction platform is formed by slope cutting, excavation, and backfilling support structures. Foamed concrete backfill and pile-slab retaining walls are used to provide reaction support, enabling controllable retreat of the pipe jacking equipment and material savings.
It reduced construction difficulty and cost, improved construction safety and economy, avoided deep shaft construction and equipment dismantling, solved the problem of building a construction platform under building constraints, and enabled the retraction of pipe jacking equipment under conditions without receiving shaft.
Smart Images
Figure CN122407207A_ABST
Abstract
Citation Information
Patent Citations
CN120759596A