Mechanised Tunnel Drives with optimised Support Pressure Control

Urban tunnelling is increasingly being characterised by mechanised drives with varying face support. High demands must be placed on the quality of design and foremost proper control for supporting the working face so that such projects can be executed safely in a tricky environment featuring a densely built-up area with extensive utilities as well as busy transportation facilities. The determining of the effects of fluid and earth pressure support and differences and problematic aspects in the proof concepts are explained. Two projects involving drives are used for exemplification.

Introduction

The technical and economic possibilities for the application of mechanised drives for all possible diameters are constantly growing. Tunnelling measures are consequently being more readily accepted in urban ­areas thanks to the application of these construction methods. In this connection the application of trenchless driving methods reduces the restrictions imposed on the surface to a minimum. Efficient supporting of the face represents a major influence for the success of a mechanised drive especially in water-saturated soft grounds. Proper adjustment of the support pressure is...

Related articles:

Italy

Mighty Breakthrough for Europe's Biggest Tunnel Boring Machine

Santa Lucia Tunnel, A1 Highway, Bologna– Florence

The large three-lane Santa Lucia Tunnel is a key project in the expansion of the A1 highway between Bologna and Florence. Thanks to optimized routing on the previously winding highway, the efficient...

more
Issue 2018-02 Calibrating empirical and numerical Calculations with Measurements Values

Surface Settlements at the Boßler Tunnel

1 Introduction Surface settlements tend to present an ever-recurring risk in tunnelling for the infrastructure above the tunnel. This must be predicted on the basis of a model as realistically as...

more
Issue 2020-02 Thailand

Orange Line Metro Project Bangkok: Breakthrough of the Westbound Tunnel on Contract E3

In January 2020, TBM manufacturer Terratec joined workers and officials in celebrating the breakthrough of the 6.39 m diameter S70 EPB machine by contractor Italian-Thai Development PCL (ITD) on one...

more
Issue 2011-04 Germany

First Tunnel driven for the Düsseldorf Wehrhahn Line

The Wehrhahn Line, a 300 mill. euro project is intended to relieve traffic in the centre of Düsseldorf considerably once it is opened in 2015. The 3.4 km long Underground line will replace a number...

more

Mechanised Tunnel Drives with optimised Support Pressure Control

Urban tunnelling is increasingly being characterised by mechanised drives with varying face support. High demands must be placed on the quality of design and foremost proper control for supporting the...

more