基于Asaoka法的非等间隔真空预压土体沉降数据处理  

Data Processing of Vacuum Preloading Soil Settlement at Unequal Intervals Based on Asaoka Method

作　　者：贺迎喜[1] 文辉辉[1] 梁小丛[1] 何丽平[1] 

机构地区：[1]中交四航工程研究院有限公司中交交通基础工程环保与安全重点实验室,广东广州510230

出　　处：《水力发电》2014年第3期23-25,36,共4页Water Power

摘　　要：工后沉降量是反应地基加固效果的直接技术指标,必须以最终沉降量的计算为依据。为判定某软基施工工程的施工效果和确定停泵时间,以真空预压过程中土体实测沉降量为依据,采用三次样条曲线插值法对非等间隔时距下的实测沉降量进行转化,选用Asaoka法对土体最终沉降量进行预测和软基工后沉降量的计算。结果表明,时间间隔为5 d时对应的最终沉降预测结果较好;抽真空开始后的第120 d,软基土体工后沉降量满足设计要求,可停泵。The post-settlement is a direct index indicating in foundation reinforcement effect and it is calculated based on the final settlement. To estimate the construction effect of a soft foundation engineering and determine the pausing time of pumping, the soil settlements during vacuum preloading are recorded at first, then the cubic spline curve interpolation method is used to process the measured settlements at unequal intervals, and the final settlement is predicted and post-settlement is calculated by Asaoka Method. The result shows that the final settlement can be predicted quite well at the time interval of 5 days, and the post--settlement of soft can meet the design requirement and the pumping can be stopped at the 120th day after pumping.

关 键 词：地基处理 工后沉降量 最终沉降量 三次样条曲线 非等间隔时距 

分 类 号：TU472[建筑科学—结构工程]