Schildvortriebseinrichtung mit einer Druckkammer zur Aufnahme eines Gaspolsters

摘要

The invention relates to a driving shield (1), the face breast of which can be supported selectively by earth pressure, compressed air or fluid, and which possesses, in addition to a mechanical (20) and a hydraulic (21) conveying device, a device for a fluid support of the face breast. According to the invention, the mechanical conveying device (20) is designed as a pressure chamber (25) for receiving a gas cushion loading the supporting fluid in the working chamber (5) of the driving shield (1). (Figure 1).