黄土地区大厚度填方地基填筑期间沉降变形监测方法

Monitoring method for settlement deformation of large thickness fill foundation during filling in loess area

采用合理有效的沉降变形监测方法,不仅能在土方填筑期间获取更为真实的沉降监测数据,还能更好地进行工后地基沉降变形的预测及控制工作。本文以陕北黄土丘陵沟壑区某填方工程为例,阐述了一种在填方地基填筑期间的沉降变形监测方法。该方法采用分层开挖探井的方式安装沉降监测元件,在安装完成后对探井进行回填夯实,基本不影响填土施工过程及施工质量。文中陈述了两种沉降监测设备,通过比较两组沉降监测数据,总结分析了大厚度填方地基填筑期间沉降变形监测方法的适用性,可为类似工程填筑期间沉降变形监测提供参考。

Using reasonable and effective monitoring method for settlement deformation,not only more realistic settlement monitoring data can be obtained during the soil filling,but also the work for predicting and controlling the foundation settlement after construction will be easy and better. Taking the fill engineering in loess hill and gully area of northern Shaanxi Province for the example,the monitoring method for settlement deformation of the fill foundation during filling is described. The method is excavating the stratified inspection wells to install the settlement monitoring components,and the backfill and compaction to the inspection wells after the installation are carried out,which does not influence the process of filling construction and construction quality. Two kinds of settlement monitoring equipments are stated. By comparing the two groups of settlement monitoring data, the applicability of settlement monitoring method for large thickness fill foundation during filling is summarized and analyzed,which gives some reference to the similar projects for settlement deformation monitoring during filling.