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三门峡火电厂一期工程地处黄河南岸II、III级阶地上 ,勘探区内地基土主要为第四纪晚更新统的马兰黄土 ,钻孔揭示出的土层自上而下分为 3层 ,最上层为湿陷性黄土 ,层厚 3～ 1 8.5m ,具有中等压缩性、湿陷量大、湿陷起始压力小等特性。经各能级强夯消除湿陷深度计算 ,对主厂房、烟囱、混煤罐区采用 80 0 0kN·m级强夯 ,冷却塔、循环水泵房区采用 6 5 0 0kN·m级强夯 ,厂前建筑区等采用 30 0 0kN·m级强夯 ;夯打以最后 3击贯入度≤ 5 0mm为止 ,再用碾压机压实 ,垫二八灰土层 1m(厂前建筑区除外 ) ,作C1 0素混凝土垫层 1 0 0mm。经检查 ,强夯效果良好 ,质量符合要求。
The first phase of Sanmenxia Thermal Power Plant is located on the Grade II and III terrace on the south bank of the Yellow River. The main soil in the exploration area is mainly Malan loess of the Quaternary Late Pleistocene. The soil layers revealed by drilling are divided into three layers from top to bottom, The top layer of collapsible loess, layer thickness 3 ~ 1 8.5m, with moderate compressibility, large amount of collapse, initial collapse pressure and other small features. After each level of dynamic compaction to eliminate the collapse depth calculation, the main plant, chimney, mixed coal tank area with 80 0 0 kN · m level of dynamic compaction, cooling towers, circulating pump room area with 6500kN · m-class dynamic compaction, The factory building area and so on with 30 0 0 kN · m-class dynamic compaction; ramming to the last 3-penetration penetration ≤ 50 mm so far, and then compacted by the compaction machine, pad two eight soil layer 1m (plant area before the construction) , Made of C1 0 plain concrete cushion 100mm. After inspection, dynamic compaction effect, quality to meet the requirements.