Pressure Gradients and Muck Properties at the Face of An EPB

Pressure Gradients and Muck Properties at the Face of An EPB Bezuijen, A. Primary Author mixed material bibliography London Taylor & Francis Group, 2006 en English 195-203p. Proceedings Geotechnical Aspects of Underground Construction in Soft Ground Measurements are presented that were performed in the preassure chamber and screw conveyor of an EPB TBM. The TBM operated in saturated sand with a high water table. Foam was applied forsoil conditioning. Different from a slurry shield there was no direct relationbetweenverical the pressure gradient r and the density of the muck in the pressure chamber. The pressure measurements differ considerably for different rings. The density and saturation of the mixture was measured by taking samples from the pressure chamber during excavation. Densities found indicate a porosity just higher than the maximum porosity of the sand. A pressure drop of approximately 1 bar was found when the muck passes from the pressure chamber to the screw conveor. Explanations are presented in the paper. LOKASI: Ruang Koleksi Umum Rak: 2 SOIL CONDITION 624.121 (063) 0415391245 Perpustakaan Direktorat Bina Teknik Jalan dan Jembatan Direktorat Jenderal Bina Marga - Kementerian Pekerjaan Umum (NPP: 3273244A00000001) 624.121 (063) 20440 2016-04-28 16:17:31 2021-04-30 13:38:40 machine generated