真空堆载联合预压效果检验

在软土地基上修筑高速公路路堤时，往往因为工后沉降过大需要进行地基处理，软土地基处理的方法很多，不同处理方法的费用、效果、工期相差很大，真空堆载联合预压方法以其较低的费用、工期较短，效果好已经在许多类型工程的软土地基处理中得到应用，结合宁靖盐高速公路工程中使用真空堆载联合预压法处理软土地基的试验，用对比试验结果说明了处理效果和有效处理深度，为该工法在高速公路工程的软基处理中推广应用提供参考。

EFFECT EXAMINATIONS OF THE VACUUM-MOUND PRELOADING METHOD

The soft foundations of expressway must be strengthened to keep the settlement within the permitting value especially for the high road embankment. There are many engineering methods to strengthen soft foundations,and the expense,result,and construction period are different for different methods. The vacuum-mound preloading method is one of these methods that have many advantages such as low expense,short construction period,and good effect to very soft soils. This method has been used in many kinds of engineering project to strengthen the soft foundations. At a test section at Nanjing-Jingjiang-Yancheng expressway has been used the vacuum-mound preloading method,the effect and valid depth become known through the test results. The conclusions are useful for spreading this method in the expressway construction.