揭普高速公路腐木淤泥混合土地基处理方法分析  

Analysis of Method of Foundation Treatment for Rotten Wood and Silt Mixed Layer of Jie-Pun Expressway

作　　者：黄少杰 吴玉财 

机构地区：[1]广东粤东高速公路发展有限公司,揭阳市515525 [2]广东粤赣高速公路有限公司,河源市517000

出　　处：《公路》2005年第9期102-105,共4页Highway

摘　　要：根据孢粉、扫描电子显微镜、C14检测数据和前人的资料,确定了腐木淤泥混合土的成因环境和分布特征。通过分析揭普高速公路软基路堤施工期及运行期的实测沉降资料,结合成因环境,说明了采用袋装砂井进行深层处理含腐木软土地基的合理性及必要性。含腐木的软土地基在进行深层处理后,沉降发生早、收敛快,工后沉降小;不进行深层处理则沉降时间长,工后沉降大。The geological cause of the mixed layer and its distributing characters are defined by spore pollen analysis, scanning electron microscope and C14 isotope test in this paper. By analyzing the settlement observed data in construction and running period of Jie-Pu Expressway, it shows that sand wick is reasonable and necessary for treating rotten wood and silt mixed layer. The settlement of soft soil foundation which contains rotten wood is fast in convergence after it is deep treated and has a little postconstruction settlement. The post-construction settlement will be large and the time of settlement is long if the deep silt layer is not treated.

关 键 词：腐木淤泥混合土 袋装砂井 超载预压 

分 类 号：U412.22[交通运输工程—道路与铁道工程]