BP 4166 GB Site report An impressive tunnel building pro- ject in Spain's capital, Madrid, is to run the southern section of the heavily used M30 urban motorway under the earth's surface. A number of Putzmeister pumps have been used here for placing concrete and for backfilling the tubbing with special mortar. Pumping distances of 600 m, high air humidity and harsh continuous operation were on the agenda at this mammoth construction site. The tu

Join for free to read