监测技术在双层软黏土固结度计算中的应用分析

Analysis for Application of Monitoring Technology in Calculation of Consolidation Degree of Double-Layered Soft Clay

深厚软黏土常成层分布,本文针对典型双层软黏土,在地基处理时采用监测设备获取沉降及孔压变化数据,推算地基应变、应力固结度,并与太沙基一维渗流固结理论计算固结度进行对比分析。研究应力、应变固结度在特定条件下的关系,探讨监测技术在双层软黏土固结度计算中的应用。工程实践表明:当土体固结度达90%以上时,不同方法计算固结度基本一致,满足工程使用要求,且采用沉降监测值推算固结度方法简单、可靠性高、实用性强,可在工程中广泛应用。

Deep soft clay is often distributed by layers.In response to typical double-layered soft clay,the monitoring equipment was used to gather settlement data and pore pressure change values during foundation treatment,to deduce the strain and stress consolidation degree of the foundation,which were also compared with the consolidation degree calculated by following Taishaji one-dimensional seepage consolidation theory.Furthermore,it was necessary to study the relationship between the stress and strain consolidation degree under specific conditions,and explore the application of monitoring technology in the calculation of consolidation degree of double-layer soft clay.The engineering practice shows that the calculation results of consolidation degree keep basically consistent no matter what method applies if soil consolidation degree reaches 90%or more,which meets the construction requirements.The method of calculating soil consolidation degree by using settlement monitoring values is simple,reliable and practical,which can be widely used in engineering.