软土地区作地基处理.doc

摘要 DK613+625、DK613+725DK613+820。然后根据该路段的工程地质情况，对地基承载能力进行了验算。并采用分层总和法计算了天然沉降量得出三个断面处的沉降量分别为82.9cm、31.6cm和55.4cm，远远超过了规范要求的1.0cm。因此就三个断面进行了CFG桩加固处理，计算出沉降量分别为0.69cm、0.33cm和0.44cm，小于1.0cm，满足设计要求。 CFG桩 Abstract Soft soil engineering problems often encountered in high-speed railway subgrade, The quality and choice of treatment method will directly affect the stability and safety of the track structure to use, so soft processing technology is very important for high-speed railway construction. This design outlines the definition of soft soil, classification and main distribution area, the characteristics of soft soil roadbed construction, and features high-speed railway, development status, Article according to the specific treatment of several soft theory and construction technology, mainly for high-speed rail soft, respectively, of the following three paragraphs mileage conducted a cross-sectional design: DK613 +625, DK613 +725 and DK613 +820. Then according to the section of the engineering geological conditions, the bearing capacity of the foundation checking. And the use of natural stratification method to calculate the sum settlement, obtained three sections at the settlement were 82.9cm, 31.6cm and 55.4cm, are far greater than the regulatory requirements of 1.0cm. Therefore carried out three sections at the foundation of CFG pile reinforcement, then calculate the amount of the settlement after labor were 0.69cm, 0.33cm and 0.44cm, were less than 1.0cm, meet the design requirements. Keywords: High-speed rail; soft soil roadbed; settlement calculation; soft ground; CFG pile 目 录 摘 要 I 关键词： I Abstract II 目 录 III 1绪 论 1 1.1高速公路路基的特点 1 1.2软土的成因类型及分布 2 1.2.1软土的概念 2 1.2.2软土的成因类型 2 1.2.3软土的分布 3 1.3软土的工程性质 5 1.3.1软土的工程性质和力学性质 5 1.3.2松软土的力学性质 7 1.3.3软土地基常见工程问题 8 2路基的横断面设计 10 2.1工程地质条件 10 2.1.1设计范围及类型 10 2.1.2工程地质及水文地质概况 10 2.2设计依据 10 2.3路基横断面设计 11 2.3.1高速铁路路基面形状 11 2.3.2高速铁路路基面宽度 12 2.3.3高速铁路路堤横断面设计 14 3沉降量计算 16 3.1基本概念 16 3.2软土路堤的沉降计算 17 3.2.1地基中的应力分布 18 3.2.2沉降量的计算 18