土工格栅在高速铁路软土地基处理中的应用

Experimental study on settlement and information construction of soft soil ground

通过采用粉喷桩、浆喷桩、真空联合堆载预压、塑料排水板超载预压、砂桩超载预压等方法处理高速铁路软土地基的现场试验,对土工格栅在不同处理方法中的作用进行了研究。得出各种地基土工格栅应变量和相应的应力试验数据,为不同的地基处理方法采用不同强度的土工格栅设计提供参考。

According to the in field test on soft soil ground in high-speed railway treated with dry jet mixing pile, deep cement mixing pile, vacuum preloading combined with heaped preloading, plastic drain belt combined with surcharge preloading, sand pile combined with sureharge preloading, this article studies the affection of the geogrid in different ground treatment. The test indicates that the strain of the geogrid is 0.9%-4.3% and the stress is 8.1-40.7 kN/m, which is 25%-50% of the uhimate strength. In design, the geogrid of different strength should be choosed aceording to the different ground treatment.