桩承土工合成材料加筋垫层复合地基作用原理及应用

Geosynthetic-reinforced and pile-supported earth platform composite foundation

桩承土工合成材料加筋垫层法是近些年发展起来的一种有效的软土地基加固方法。简要地介绍了桩承土工合成材料加筋垫层法的设计和使用情况,主要包括其作用机理、设计方法和工程应用。桩承土工合成材料加筋垫层法主要适用于软土地基下有承载力较大的坚硬土层或岩层,上部有一定的填土高度,工期紧张,对总沉降和不均匀沉降有要求比较严格的情况。目前该方法已经被广泛应用于公路、铁路、桥台后过渡段、分段挡土墙、旧路加宽和房屋建筑的一些实际工程中。

Geosynthetic-reinforced and pile-supported (GRPS) earth platform has been emerged as an effective alternative successfully adopted worldwide to solve many geotechnical problems. This paper provides the state of the practice review of the use and design of GRPS embankments. The review includes working mechanisms, design considerations, and applications of GRPS embankment systems. The review concludes that GPRS embankment systems are most suitable for situations with a very soft soil underlain by a stiff soil layer or bedrock, new fill with certain thickness needed, rapid construction necessary, and strict total/differential settlement required. The common applications of these systems include bridge approach, roadway widening, and railroads or highways across soft soil.