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Advantages of curved Microtunneling with Hydraulic Joint

Case Study from Switzerland


In the City of Zurich/Switzerland an almost hundred year old sewer pipeline had to be replaced by a new 294 m long reinforced concrete pipe line with an inner diameter of 1200 mm. Due to narrow spaces and heavy traffic conditions Microtunneling technique showed to be the most suitable technique and has been chosen by the owner and the designing engineer. Geometrical boundary conditions and existing underground utilities only allowed a curved alignment with the small radius of 125 m. Applying the Hydraulic Joint system the demanding alignment could have been driven with regular pipe length of 3 m with no significant reduction of the jacking speed. This paper gives in its first part a short introduction in the theory and the way of function of the Hydraulic Joint pressure transmission ring. In the second part it shows the development of the project between the involved parties and the most significant experiences made on this exceptional job.

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Jackcontrol AG
Buchholzstrasse 50
8750 Glarus, Switzerland
T +41 55 650 2020
F +41 55 650 2030

CPi worldwide journals are trade journals for the concrete and precast concrete industry that are published in 10 different language editions in more than 170 countries. These trade journals, with their practical editorial reporting on research, production and applications, are specifically addressing the decision makers of the concrete and precast concrete industry.

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