高等级公路拓宽中新旧路基处治技术及施工工艺控制

随着我国公路建设的不断发展，许多早期修建的高速公路路面宽度已经不能满足交通运输的需求，需要拓宽改造；而且大量新建的高速公路与既有高速公路相互交错，形成被交互通，更使既有高速公路拓宽工程大量增加。因此，研究如何控制既有高速公路路基拓宽的施工质量，完善控制沉降和差异沉降的统一标准，具有很重要的实际意义。

Treatment Technology and Construction Technique Control of Old and New Subgrade in High-grade Highway Widening

Along with the continuous development of highway construction in China, the pavement width of old expressway constructed early hasn＇t satisfy the needs of transportation, thus the expressways need to be widened. A great deal of new expressways and old expressways intercross each other which causes the great increase of expressway widening projects. Therefore, the study of how to control the construction quality of old expressway subgrade widening and perfect the uniform standard of control settlement and differential settlement has great practical significance.