三级公路

三级公路改建设计的问题及对策

Problems and Treatment Measures of Second and Third-classed Road Reconstruction Design

三级公路改建设计分析

An Analysis of the Second and Third-Classed Road Reconstruction Design

关于一、三级公路安全性认知因素的试验建模研究

Tests and Modeling for the Safety Perception Factor on First-grade and Third-grade Highway

沿边三级公路建设工程质量管理探讨

The Investigations on the Quality Control of the Third-Grade Highway Construction in Yanbian

山区二、三级公路汽车安全行驶状态研究

Study on the Second and Third-classed Mountain Road 's Driving State of Vehicle Safety

最后提出了山区双车道三级公路纵坡坡度的安全值为7%。

Finally this paper suggested the safe slope grade for the third class mountain area highway should be 7 % .

此外，在国家公路网中，有许多二、三级公路也需要改造，同样也涉及到路基的加宽加高等问题。

What 's more , many 2 or 3 grade highways in the highway network of country also need to be rebuilt , and this also deal with widening and heightening of the embankment .

在空间上，黄土粒度分维值存在显著的区域性变化规律，该区域性变化规律与甘肃黄土地区三级公路自然区划的5个三级区一致。

Analyzing results also show that the fractal dimension ( D ) of loess grain size has obvious spatial variation law , well reflecting the difference among the five sub-regions of Gansu third-grade highway natural zoning .

在我国，面层裂缝是二、三级公路的主要病害形式，尤其是半刚性基层温缩及干缩引起的反射裂缝。

The surface crack is one main disease for the second and third highway in our country , especially the reflection crack caused by the dry - shrinking property and the temperature shrinking property of semi-rigid base .

在对山区双车道三级公路上实测速度的统计分析的基础上，使用数理统计和分析的方法，得到速度累计频率分布曲线，确定85%位速度为51km/h。

Based on surveyed speed data on the third class mountain area highway , the statistics method was used to draw the speed distribution curve and it was found that the 85 percentile speed was 51km / h.

继则对2000年我国高速公路和一、二、三级公路上水泥混凝土路面的发展规模水平进行预测，并估计出实现这一设想所需耗用的水泥数量。

And then , the scales of cement concrete pavement construction on freeways and on first , second and third class highways in China by the year of 2000 are predicted , ann the total quantity of portland cement required for construction of these pavements is estimated .

本文对国内三条一级公路的路面结构设计方案进行验算、分析，并提出修改意见。

The design alternatives of the pavement structure of three first class highways in China are examined and analyzed , and some correct suggestions are put forward .

通过对我国城市间大量存在的二级、三级等双车道公路上运行车辆车头时距的研究，提出了一种改进的M3车头时距分布模型；

On the headway research of the two lane highway in our country , this paper provided the improved M3 headway distribution model .