【摘要】 通过模型试验、数值模拟2种方法对长短桩复合地基沉降变化规律进行研究,结果表明:荷载变化对地基沉降有直接影响;在进行沉降控制设计时,长桩长度和长短桩长度比是影响复合地基整体沉降的关键,长桩长度调整复合地基的整体加固深度,短桩长度调整复合地基中的复合加固区的压缩量;长短桩复合地基不同深度位置处的沉降不同,单桩加固区的压缩量最大,其次为复合加固区,最后为下卧层;采用长短桩的地基处理形式能够有效控制地基整体沉降和差异沉降。更多还原

【Abstract】 The reduced scale model test and the numerical simulation were designed to investigate the settlement of composition ground with long-short-pile It was found that the variation of load has the direct effect on the settlement of the composite ground.For the settlement control design,,the long pile length and the ratio of long pile and short pile are the key factors for the settlement of composite ground.While the long pile length controls the whole reinforcement depth,the short pile length contributes to the compression at the composite reinforcement area on the long-short-pile composite ground The value of settlement under different depth location is unequal,i.e.,the compression at single pile reinforcement area is the biggest,followed by the composite reinforcement area,and the substratum.The long-short-pile composition ground can effectively control total settlement and uniform settlement of the composition ground.更多还原