1引言
公路路基施工是整個公路施工工程的關(guān)鍵所在，稍有偏差，將給整個工程埋下質(zhì)量隱患。例如，在公路施工中常會遇到諸如軟土路基，黃土路基等不良路基，如不加以特別處理，會引起填方路堤施工后沉降或不均勻沉陷，路面縱橫坡變碎，平整度下降，導致行車顛簸等，嚴重影響公路的正常使用，造成大量的人力、物力、財力浪費。因此，路基施工應根據(jù)施工當?shù)氐匦巍⒌刭|(zhì)狀況、公路等級、所在地區(qū)的氣候、結(jié)合施工填挖方平衡等來選擇施工方法。
2路基填壓
公路路基的強度和穩(wěn)定性很大程度取決于路基填料的性質(zhì)及其壓實的程度。從現(xiàn)有條件出發(fā)，改進填土要求和壓實條件是保證路基質(zhì)量經(jīng)濟有效的方法。
2.1路基填料
現(xiàn)行《公路路基設(shè)計規(guī)范》（以下簡稱規(guī)范）規(guī)定了對路基填料的要求。對路基填料的最小強度和最大粒徑給了量化的標準，采用承載比實驗（CBR）值表征路基土的強度，引入了路床的概念。對上路床的填料提出了限制條件，高速公路和

1 Introduction
Roadbed construction is the key to the highway construction project, the slightest error will lay the whole project quality risks. For example, the Central Standing Committee met in the highway construction such as soft soil roadbed, roadbed and other bad loess roadbed, if not special treatment, would lead to construction of the embankment fill or uneven settlement after settlement, the road becomes broken vertical and horizontal slope, roughness decreased, resulting in road bumps, etc., seriously affect the normal use of the highway, causing a lot of manpower, material and financial resources to waste. Therefore, construction of embankment construction should be based on local topography, geology, road grade, where the region's climate, combined with the construction of such fill and cut Fang Pingheng to select the construction method.
2 roadbed fill pressure
Road subgrade strength and subgrade stability largely depends o