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通过在京珠高速公路广珠东线某试验段进行的系统室内配合比试验、工程桩大型无侧限抗压试验、现场天然地基、粉喷桩复合地基、粉喷桩单桩载荷试验和现场沉降观测 ,分析了粉喷桩的掺入比与桩体强度增长关系、处理的效果 ,探讨了粉喷桩处理软土地基的掺入比、强度增长、沉降量减少等机理问题 ,表明粉喷桩是一种处理桥头过渡段软基的有效方法。
Through the systematic indoor mix test, the large unconfined compressive test of engineering piles, the on-site natural foundation, DJM composite foundation, the single pile load test and site settlement of DJM pile in a certain test section of the east of Guangzhu of Beijing-Zhuhai Expressway Observation and analysis of the relationship between the mixing ratio of DJM pile and the growth of pile strength, the effect of treatment, discussed the mechanism of the DJM pile mixing soft soil foundation incorporation ratio, strength increase, settlement decreased and so on, It is an effective way to deal with the soft foundation of bridgehead transition section.