沉降速率系数确定方法(英文)

Methods of Decision of Coefficient of Settlement Velocity

沉降速率法常用于确定路面施工时机,因此沉降速率系数的确定对路面施工非常重要。当路基的地质、地基处理、施工等方面的资料都齐全时,可以按照固结理论计算得到沉降速率系数。在工程实践中更多地利用施工监测资料反演计算沉降速率系数,目前常用的反演方法有三点法、孔压~时间曲线拟和法等。在固结理论等已有研究成果的基础上提出了t^1nSr法、St^Vs法、双曲线法、Asaoka法等方法,工程实践证明上述方法是可行的。理论分析和工程实践都表明多层地基的沉降速率系数随时间增加而减小。

Decision of coefficient of settlement velocity is very important to construction of pavement since method of settlement velocity is often used to decide the construction time of pavement. Coefficient of settlement velocity can be calculated according to theory of con- solidation if the conditions of geology and ground improvement, and construction of a highway are all well known. It is more often back analyzed with field observations. Three - point method and fitting of pore pressure vs. time curve are present methods of back analysis. Some new methods such as t - lnSr, St ～ Vs, hyperbolic method, Asaoka method, et al are advanced basing on present research achievements such as theory of consolidation and they are proven practical. It is illustrated by theoretical analysis and practical engineering that coefficient of settlement velocity of multi - stratum ground decreases with the increase of time or finished settlement.