Experience with the reconstruction of an industrial establishment

Let us examine the experience gained with the reconstruction of a shop at the Riga Electric-Machine-Building Plant. The five-story frame of the shop with a 266 × 27-m planform, bearing frame, and ceilings of monolithic reinforced concrete and brick walls was constructed in 1914. It is located on a river bank, which is composed of Quaternary deposits in the form of silts and silt-filled sand with an overall thickness of 30-60 m. From the surface, the section is covered by a layer of hydraulicked sand 1 2.0-4.5 m thick; below this lies silt 2, which is separated by a layer of fine sand 3 0.4-2.4 m thick. The thickness of the silt layer is 8-10 m, the density 1.4-1.6 ton/m 3, the moisture content 50-85%, and the specific cohesion 5~0-I0~0 kPa. The silts are under%ain by silty and fine sands 4 of medium density (see Fig. i). Gound water is encountered at a depth of 1.0-2.4 m.