长短组合桩复合地基沉降预测研究  

Settlement Prediction of Long-short-pile Composite Foundation

作　　者：陆华[1] 高全臣[1] 吴浩[1] 赵化帅[1] 孟猛[1] 

机构地区：[1]中国矿业大学(北京)力学与建筑工程学院,北京100083

出　　处：《施工技术》2013年第19期30-33,36,共5页Construction Technology

摘　　要：采用理论计算与现场实测数据分析相结合的方法,研究长短组合桩复合地基的沉降预测问题。按照规范方法中的分层总和法把组合桩复合地基沿竖向依次划分为垫层、加固Ⅰ区、加固Ⅱ区和下卧层4个区域,分别计算各层压缩量,最后通过叠加得到了长短组合桩复合地基沉降计算公式。选择GM(1,1)灰色模型和双曲线拟合的方法分别对组合桩型复合地基的工后沉降进行预测,通过对比分析2种方法预测的工后沉降与实测结果,提出灰色模型预测方法能较好地预测深厚软土中组合桩型复合地基的工后沉降量。This paper studied the long-short-pile composite foundation, which is divided into cushion, No. I strengthening area, No. II strengthening area and the underlying layer four areas along the vertical direction in turn. It has obtained the settlement calculation formula of the long-short-pile composite foundation by the superposition of each layer of compression which is separately calculated according to the standard method of layer-wise summation method. Selecting GM （ 1,1 ） model and the hyperbolic fitting method to predict the post-settlement construction of the combined pile composite foundation respectively. It is put forward that the gray model forecasting methods can be used to predict the post- settlement construction of the composited pile composite foundation in deep soft soil by comparing the two methods of the predicted post-settlement construction with the measured results.

关 键 词：地基 复合地基 组合桩 灰色模型 沉降 预测 

分 类 号：TU47[建筑科学—结构工程]