扁铲侧胀试验技术的应用研究

Application of Dilatometer in Shenyang Area

为了验证扁铲侧胀试验在沈阳地区的适用性,解决应用扁铲侧胀试验划分土类等实际问题。通过对沈阳地铁工程扁铲侧胀试验数据的整理与分析,得到了沈阳地区侧胀土性指数、侧向基床反力系数的分布规律;提出应用侧胀土性指数ID划分土类、估算土的重度;应用经验公式求解土的竖向压缩模量;应用唐世栋推荐法求解侧向基床反力系数。研究结果表明:扁铲侧胀试验是一种适宜在辽沈地区推广的原位测试技术。研究可为辽沈地区扁铲侧胀试验的工程应用提供有效的依据,为地区性规范编制提供可靠资料。

This paper discusses the dilatometer test results in Shenyang area. The objective of these tests is providing verifica tion results of dilatometer in the classification of Shenyang soils. The Shenyang soil parameters, such as, material index Id, horizontal stress index Kd, are obtained throughout these tests. The empirical relationships between material index Id and soil classification, unit weight as well as compression modulus in the vertical direction are developed. It is concluded that the lateral subgrade reaction modulus can be reasonably estimated by using the approach that is proposed by Tang Shidong. The compara- tive testing results conclude that the dilatometer is a technique that can be applied in Shenyang soils. This study also provides reliable data for the local soil design code preparations.