【作者】 吴燕开；

【导师】 樊怀仁；

【作者基本信息】 西安科技学院 ， 地质工程， 2002， 硕士

【摘要】 本文主要通过对江苏南通九华—海门段高速公路所通过区域软土的工程地质性质以及各物理力学指标之间关系进行了全面系统的分析研究，由回归分析建立了各力学指标间关系，计算出软土层的容许承载力。在这些基础上，利用瑞典条分，计算出堆载路基的稳定系数。在估算其沉降量大小时，用三种方法(e-p法、e-logp法以及a_v1-2)进行计算和对比，得出适合该区沉降量计算方法为e-p法。三种方法计算出路基沉降量大于规范要求。 因计算出地基附加应力小于软土层的容许承载力，稳定系数小于1.25，沉降量大于30cm，所以该区软基必须进行处理。在研究软土处理方案进，分析了多种常用软基处理方法（如堆载预压、塑料板排水、粉喷桩等）的基础上，针对本区实际情况，得出塑料板排水法是处理该区软基的较好方法。更多还原

【Abstract】 In this article the engineering geology character of soft soil and physical mechanics guidelines’ relation are analyzed whole; Which the freeway of Jiuhua-Haimen Nan tong Jiangsu province has passed, and the formula of physical mechanics guidelines’ relation has been establish; carrying capacity of soft soil has been calculated. The stability coefficient of roadbed has been counted by Sweden piece. At the same time, in order to compute the settlement, three methods (e-p, e-logp,avi-2) are used, the better count is that the e-p. The results of evaluating by the three methods are big.Because the add-on stress of soft soil is little than the carrying, the stability coefficient is little than 1.25, the settlement is more than 30cm, so the soft foundation must has been treated. At last, by analyzing the common methods (prediction-reloading pi^ cement injection plastic drain board and so on), according the real thing, the plastic drain board is considered the better method to treat foundation in this area.更多还原