不同预测方法在深厚软土路基沉降中的应用

Application of different prediction methods in deep soft soil subgrade settlement

珠三角广泛分布着深厚软土路基,其工后沉降是影响道路在运营过程中稳定性和安全性的主要因素之一。为了更好地研究深厚软土路基沉降发展趋势,本文依托工程实例,采用4种预测方法来拟合沉降监测数据,并结合实测数据对这些方法的精确度进行评估和对比,进而预测工后沉降。预测结果表明:对于经过塑料排水板、水泥搅拌桩这两种不同方式处治后的深厚软土路基,精确度最高的沉降预测方法均为双曲线法。经过板、桩处治后的软基工后沉降量均能满足规范要求,证明处治方案合理有效。

The PRD is widely distributed with deep soft soil subgrades,and its post-construction settlement is one of the main factors affecting the stability and safety of roads during operation.In order to better study the settlement trend of deep soft soil subgrade,this paper relies on engineering examples,adopts four prediction methods to fit settlement monitoring data,and evaluates and compares the accuracy of these methods based on measured data,so as to predict post-construction settlement.The prediction results show that for the deep soft soil subgrade treated by plastic drainage board and cement mixing pile,the most accurate settlement prediction method is the hyperbolic method.The settlement amount of soft foundation after plate and pile treatment can meet the requirements of the specification,which proves that the treatment plan is reasonable and effective.