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预浸水法是消除黄土地基湿陷性的一种处理方法,具有施工条件简单,处理效果好的优点。采用浸水法对兰州连城铝厂306厂阳极糊车间的自重湿陷性地基进行处理,由现场与室内试验分析地基土浸水前、后干密度、湿陷变形特性以及地基承载能力的变化及土垫层法和外扩桩法的处理效果。分析结果表明:浸水可以基本消除10 m范围内黄土的湿陷性,但短期承载能力会下降;采用垫层法处理有利于附加应力的扩散;承台对浸水地基承载力的影响可以忽略不计。
Presoaking water method is to eliminate loess foundation collapsible a treatment method, with the advantages of simple construction conditions, good treatment effect. The soaking method was adopted to treat the collapsible and collapsible foundation of the anode paste workshop of 306 Liancheng Aluminum Plant in Lanzhou. The on-site and in-house tests were conducted to analyze the changes of dry density, collapsible deformation before and after soaking of foundation soils and the bearing capacity of the foundation, The effect of layer method and extension piling method. The results show that water immersion can basically eliminate the collapsibility of loess within 10 m, but the short-term load carrying capacity will decrease. Adopting cushion method is conducive to the diffusion of additional stress. The influence of cap on the bearing capacity of water-soaked foundation is negligible.