基于振动碾压下沉量对比的一种珊瑚砂次压缩系数推测方法

Inferring Method of Coral Sand Coefficient of Secondary Compression Based on Settlement Comparison of Vibration Rolling

工程中对于工后沉降的预测有重要的实际意义,而次压缩系数是工后沉降预测的关键参数。对于吹填珊瑚砂采取原状土样进行室内试验确定其次压缩系数是一个难题。提出了基于振动碾压下沉量对比反演推测珊瑚砂次压缩系数方法并给出了计算实例,该法通过查询老吹填场地的历史吹填时间,对比振动碾压地基处理试验过程中新吹填试验区和老吹填试验区的地表沉降量,对珊瑚砂次压缩系数进行反演推测。同时对影响反演推测结果的因素进行了分析。

The engineering has great practical significance for the prediction of post-construction settlement, and the secondary compression coefficient is the key parameter for the prediction of post-construction settlement. It is a difficult problem to determine the second compression coefficient of dredged coral sand by laboratory tests with undisturbed soil samples. In this paper, a method is presented for estimating the secondary compression coefficient of coral sand based on the comparison and inversion of the subsidence of vibratory compaction and a calculation example is given. The method infers the secondary compression coefficient of coral sand by inquiring the historical filling time of the old dredger filling site, comparing the surface settlement of the new dredger filling test area and the old dredger filling test area in the course of the ground treatment test of vibratory compaction. At the same time, the factors are analyzed of affecting the inversion results.