路桥过渡段不均匀沉降处治措施研究

【作者】 屈战辉；

【导师】 杨晓华；

【作者基本信息】 长安大学 ， 岩土工程， 2005， 硕士

【摘要】 路桥过渡段是公路病害多发地段,“桥头跳车”一直是困扰着公路建设的难题之一,其危害性日益得到公路界人士的重视。 本文主要从桥头跳车的危害分析入手,分析路桥过渡段差异沉降产生的原因,给出差异沉降和处治范围的计算方法,并对过渡段处治范围的确定和工后差异沉降量的控制进行探讨。通过分析研究搭板、灰土换填、石灰粉煤灰换填、土工格栅加筋土、土工格室柔性搭板、轻质填料和半刚性挤密桩复合地基等常见处治措施处治机理和适应性,划分了各自的适用范围,在此基础上,提出常见处治措施工程设计方案并给出确定设计参数的方法,同时还对各自的特点进行总结。最后,结合工程实例,对设计方案的经济性、合理性和有效性进行了探讨。更多还原

【Abstract】 Disease often occurs at the transition section between bridge abutment and embankment. The bump at the approach abutment is one of the difficult problems of worrying the highway construction, the harmfulness of which is being taken into account increasingly by the people working in highway filed.This paper begins with the harmful analysis of the bump at the approach abutment, and analyses the cause of differential settlement at the transition section between bridge abutment and embankment, and gives the calculation method of differential settlement and treatment length. By analyzing and studying the treatment mechanism and compatibility of approach slab, lime-loess replacement, lime and fly-ash mixture replacement, geogrid reinforced clay, geocell flexible approach slab, light filling and semi-rigid compaction pile composit foundation etc. treatment methods, the author summarizes the practicable range of common treatment methods, and on this bases, the author puts forward the engineering design methods of common treatment measure and gives the methods of how to ascertain the parameters, and at the same time, summarizes each feature. At last, combined with the engineering example, the author discusses the economical efficiency, rationality and effectivity of design scheme.更多还原