摘要
在堆截预压地基处理工程中,有多种推算最终沉降量的方法,却没有理论公式可直接计算在给定的卸载沉降速率时所对应的剩余主固结沉降量和卸载时间。而工后沉降(包括剩余主固结沉降和次固结沉降)和沉降速率是卸载的重要标准,次固结沉降可估算在一定范围之内,工后沉降满足要求与否则主要由剩余主固结沉降所控制。在Asaoka法中,可推算出堆载预压任意时间时的沉降速率。运用沉降速率和剩余主固结沉降的关系,可推算出任意时间的主固结剩余沉降及卸载时间的理论公式,称之为“速率法”。沉降速率的对数和堆载预压时间又成线形关系,从而由图解法也可确定卸载时间。此方法在深港西部通道填海及地基处理工程中得到很好的应用,具有较高的推广和应用价值。
There are many methods that can be employed to calculate final settlement by field settlement curve,but no formula can be straightly employed to forecast residual settlement and unloading time under bounded unloading settlement velocity in soft soil treatment project.The settlement-velocity and post-construction settlement that include residual settlement and secondary consolidation settlement are very important for unloading standard.The secondary consolidation settlement is limited within certain range;the post-construction settlement is mainly controlled by residual settlement.In Asaoka method,the settlement-velocity in preloading anytime can be calculated by applying the relationship of settlement rate and residual settlement.Of course,the residual settlement and unloading time can also be computed,which is called“velocity method”.The relationship of logarithm and preloading time of settlement rate is linear,where the unloading time can be confirmed by the graph.The method is successfully applied to the fill seafront treatment project of Shenzhen—Hong Kong West Passage.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2006年第z2期3495-3500,共6页
Chinese Journal of Rock Mechanics and Engineering
关键词
土力学
软黏土
地基处理
沉降速率
剩余沉降
工后沉降
卸载时间
soil mechanics
soft clayey
soft soil treatment
settlement rate
residual settlement
post-construction settlement
unloading time
作者简介
张长生(1970-),男,博士,2005年于中国科学院广州地球化学研究所地球化学专业获博士学位,主要从事软基处理监测方面的研究工作.E-mail:zhangchangsheng@yahoo.com
