The principle
A well-established control and monitoring system for pipe jacking and microtunneling in theory and practice.
The Principle
Failure mechanisms (4-hinge bending failure, punching shear, diagonal shearing, spalling of concrete cover)
Effects on jacking pipe
The Principle
The hydraulic joint is a recently developed pressure transmission ring that functions according to the hydraulic principle of connecting hydraulic vessels. The clever yet simple, but very efficient hydraulic joint enables a significant reduction of the forces acting normal to the pipe's axis during jacking. At the same time, even in difficult ground conditions, it is a robust and reliable measuring instrument, with which one can predict the state of stress in the pipes directly and without any knowledge of the deformation history of the joint itself. Thus, before any damage occurs, excessive deformations in the pipe can be detected and appropriate control instructions given to the jacking equipment.
Failure mechanisms (4-hinge bending failure, punching shear, diagonal shearing, spalling of concrete cover)
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| Distribution of eccentricity of jacking force: | Comparison of wooden joints and hydraulic joints |
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| Functioning principle | |
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