Pipe jacking projects are becoming ever-more demanding. Thus, the traditional approach of managing these projects simply by means of structural calculations often does not suffice. With CoJack (Computing and Controlling Pipe-Jacking) we have developed a quality-assuring instrument for the monitoring of pipe jacking projects from planning to approval of construction. Even under the most difficult conditions, jacking projects become safer, more efficient and a great deal more manageable when faced with large jacking distances, tight and alternating curves, great depths and special geological challenges.
Three phases of project monitoring by means of CoJack
- Determination of the application limits for structural calculations
- Planning optimisation
- Recommendations for construction
- Visualisation on the internet of the data measured at the construction site
- Prompt determination of the current safety level and update of the structural calculations as a forecast for further jacking measures
- Verification of the achieved structural quality by a final “re-driving” of the jacking sections
The process sequence of CoJack.
Figure: Process sequence using CoJack
Some specific key benefits of CoJack:
- Location-independent use
- Early warning system because of prompt forecasts
- Controlled use of increased jacking forces where required
- Controlled continuation subsequent to unintended steering moves subject to compliance with additional conditions and requirements
- Prompt data exchange in real time via wireless modem
- Visualisation in a secured area on the internet
- Support of the in-situ construction supervision.
- Optimization of the route
- Optimization of the design of jacking pipes
- Monitoring of the pipe jacking to avoid errors
- Proof of the achieved construction quality and improvement of the acceptance between client and construction company