新疆地区公路路面弯沉变化规律研究

摘要

In order to get the annual variation rules of pavement deflection in Xinjiang, this area is divided into 5 subareas according to the terrestrial and hydrologic conditions. Based on this division, the historical detection data of pavement deflection at 96 highways across Xinjiang is collected to obtain the annual variation of pavement deflection in various subareas. The 1 stOpt mathematical optimization analysis software is used to imitate the detection data of pavement deflection so as to get the function relationship and curve of deflection variation in various subareas. The result shows that the variation rules of pavement deflection in the subarea Ⅰ , Ⅱ , Ⅲ and Ⅴ are similar that the deflection decayed slowly within 1 - 3 years after delivery by 4 - 15 % each year on the average and decayed sharply after 3 years by 20 % or more each year on the average. The pavement deflection in subarea Ⅳ decayed year by year the data detected at delivery within 2 years, and then it year on the average. within 1 -2 years after delivery and reached 85 % of increased gradually within 2 -4 years by 15 % each%为了得到新疆地区路面弯沉年变化规律，根据地形及水文条件将全疆分为5个区，在此基础上搜集全疆96条公路弯沉历史检测数据，汇总得到各分区弯沉年变化情况，采用1stOpt数学优化分析软件对弯沉检测数据进行拟合，得到各分区弯沉变化函数关系式及曲线。结果表明：新疆Ⅰ区、Ⅱ区、Ⅲ区及Ⅴ区路面弯沉变化规律相近，交工后1～3年弯沉衰减缓慢，年均衰减率4％～15％；3年后弯沉衰减严重，年均衰减率达20％以上，新疆Ⅳ区路面弯沉交工后1～2年弯沉值逐年减小，2年后弯沉为交工检测弯沉的85％，2～4年后弯沉逐渐增大，年均增长率为15％。