在黏性土地基中平板载荷试验卸荷时间的探索与分析

Exploration and Analysis of Unloading Time of Plate Loading Test in Cohesive Soil Foundation

为探究平板载荷试验卸荷过程中地基沉降量随时间变化的特性,以及是否能够通过缩短卸荷时间来提升检测效率,对广州市白云建设工程质量检测有限公司2020—2022年的检测数据进行了详尽的统计分析。结果表明:当卸荷未至零时,黏性土地基中15~30min的回弹量较大,不可忽略;当卸荷至零后,90min后的回弹量在黏性土地基中较小,可考虑缩短其卸荷时间。

To investigate the temporal variations in foundation settlement during the unloading process of plate loading tests and assess whether reducing unloading time enhances testing efficiency,a thorough statistical analysis was conducted on Guangzhou Baiyun Construction Engineering Quality Testing company’s detection data from 2020 to 2022.The findings indicate that during the unloading process,cohesive soil foundations exhibit a significant rebound within 15~30 minutes,which cannot be overlooked.Conversely,when unloading stops,the rebound amount in cohesive soil foundations after 90 minutes is relatively minor,suggesting the potential to shorten unloading time.