高液限土地基极限填筑高度计算研究

STUDY ON THE CALCULATION OF ULTIMATE FILLING HEIGHT OF HIGH LIQUID LIMIT SOIL FOUNDATION

山区公路建设常会遇到大量高液限土,当高液限土作为地基,上部路堤的填筑将受到各方面的限制。本文利用宫川简化法、地基承载力理论公式和规范经验公式,对高液限土地基上的极限填筑高度进行了分析研究,对室内和勘察得到的4组土体参数进行了计算。给出了工程中对高液限土地基的极限填筑高度的计算方法:采用太沙基理论公式计算极限承载力,在此基础上进行折减得到高液限土地基的容许承载力并对路基基底宽度进行相应的修正。最后给出了工程中高液限土地基上填筑路基的设计建议。

Mountainous highway construction often encounter a large number of high liquid limit soil. When the soil is utilized as foundation soil, the upper embankment filling will be subject to various constraints. In this paper, based on the Gonchuan simplified method, bearing capacity theory formula and empirical formula of foundation specification, highliquid limit soil ultimate filling height is studied, four soil parameters from the indoor survey and prospecting are calculated. On the basis of this, the calculation method of the limit filling height on the high liquid limit soil foundation is given.