土体固结参数的反分析与工程应用  

Back analysis and engineering application of consolidation parameters

作　　者：王绪锋[1,2] 解廷伟 陈炯钊 李海丽 

机构地区：[1]浙江省水利河口研究院,浙江杭州310020 [2]浙江广川工程咨询有限公司,浙江杭州310020 [3]深圳市地铁集团有限公司,广东深圳518026

出　　处：《水运工程》2014年第4期154-157,181,共5页Port & Waterway Engineering

摘　　要：固结系数是排水固结法加固软土地基的一个重要参数。由于室内试验条件和现场相差较大,根据实测资料反分析算得固结参数更符合实际情况。利用某软基处理工程的沉降观测资料,从荷载总量、满载前后荷载比、满载预压时间比及测点附近边界条件变化等角度,分析各因素对固结参数的影响,拟合固结参数变化关系式,提出瞬时沉降的简易算法,推算主固结时间零点并与曾国熙法算得的修正零时点进行对比分析。The coefficient of consolidation is one of most important parameters for reinforcement of soft ground with drainage method. The parameter obtained from back analysis with in-situ data would be more consistent with the actual situation,because the test conditions of the laboratory and field are quite different. Based on the in-situ settlement data of some soft ground treatment projects, this paper analyzes various kinds of effects on consolidation parameters from the aspect of total load,load ratio before and after full-load,pre-load time ratio and changes in boundary conditions beside the in-situ points,and fits relationship formula according to changes with the parameter. Furthermore,it proposes a simple algorithm with the immediate settlement, and calculates the primary consolidation zero point of time,which is compared with the revised zero point obtained from Zeng Guo-xi method. The results may serve as reference for the engineering and research concerning soft ground treatment project.

关 键 词：实测资料 反分析 固结参数 工程应用 

分 类 号：TU472[建筑科学—结构工程]