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针对局部桥头路段软土地基路基连续放坡,路基荷载强度规律性递减情况下存在的差异沉降控制问题,采用沉降速率法与反演分析耦合的方法,分析了局部桥头路段的沉降规律,分析过程中考虑了中间透水层对地基固结速率的影响,加载过程对地基固结的影响,以及不同性质土层归一化。研究结果表明:依托工程天然地基的工程性状良好。最不利条件下,月沉降量小于8mm时,即可满足沉降控制要求。
Aiming at the problem of differential settlement control in the case of continuous grading of soft soil subgrade in partial bridgehead section and regularity decrement of subgrade load intensity, the settlement law of partial bridgehead section is analyzed by using the coupling method of settlement velocity method and back analysis. The analysis process The effect of the middle permeable layer on the consolidation rate of the foundation, the influence of the loading process on the consolidation of the foundation, and the normalization of the soil layers of different nature are considered. The results show that the engineering properties of natural foundation relying on engineering are good. The most unfavorable conditions, the monthly settlement less than 8mm, to meet the settlement control requirements.