蘭州某厂所在地区的地質条件比較复杂,基础合理砌深范圍內的土壤大部分为下沉性大孔土,土层厚度一股均在5公尺以下。我們根据这种情况,对该厂的地基提出了一些处理措施,但在施工中,由于設备条件的限制,原来所提的处理措施不能实現,所以后来我們又結合现場的具体情况作了修改。现將修改的原則通过几个典型例子介紹于后,提供大家在工作中参考。该地区的土壤大体上有下列四种: (1)黄土类砂賈粘土。这种土是下沉性的,下沉性等級力Ⅰ～Ⅱ級,个別的为Ⅲ級,天然湿度小于塑限,相对不沉系数常在0.14～0.194之間。 (2)松散而土层很厚的粉砂层。这种土壤的孔隙比大于0.7。因为它具有一种可淋濾、冲刷和机械潛 The geological conditions in the area where a factory in Lanzhou is located are quite complicated. Most of the soils within the reasonable depth of foundation are subsidence macrocarbons, and the thickness of each layer is below 5 meters. Based on this situation, we proposed some treatment measures for the foundations of the factory. However, due to the restriction of equipment conditions, the treatment measures originally proposed could not be realized. Therefore, we later combined with the specific conditions of the site Modified. Now the principle of modification through several typical examples introduced later, to provide you with reference to work. The soil in the area generally has the following four kinds: (1) loess sand Jia clay. This soil is subsidence, subsidence of grade forces Ⅰ ~ Ⅱ, individual grade Ⅲ, the natural humidity is less than the plastic limit, the relative underestimation coefficient often between 0.14 ~ 0.194. (2) loose silt layer with thick soil layer. The porosity of this soil is greater than 0.7. Because it has a leachable, scour and mechanical submersible