公路路面损坏与内部隐伏病害的关联性研究

Correlation between Pavement Distress and Structural Hidden Distress

路面结构的内部隐伏病害是影响公路性能及使用寿命的重大隐患。该文结合现行《公路技术状况评定标准》(JTG 5210—2018)中路面破损率的统计方法,提出了表征道路内部隐伏病害状况的指标——路面结构破损率。依托实际公路检测工程,对某区间长38 km、双向四车道的高速公路进行了路面损坏调查和路面以下1 m深度范围内隐伏病害调查,并按照100 m整桩号分段统计分析了路面损坏与隐伏病害总体情况及二者的空间分布规律,进一步探索了不同路面损坏状况下路面破损率和路面结构破损率的相关关系。研究结果表明:当路面损坏较严重时,路面破损率和路面结构破损率存在较强相关性。即当路面损坏状况指数较低时,内部隐伏病害也会随之增多,此时路面表观病害和隐伏病害可能存在着伴生关系;此外,随着隐伏病害的发生层位逐渐加深,更容易出现伴生的路面损坏。

The hidden distress in the pavement structure does great harm to the performance and service life of the road.In this work,based on the statistical idea of pavement distress rate in the Highway Performance Assessment Standards(JTG 5210—2018),an index of characterizing hidden distress in the pavement structure,namely pavement structure distress rate,was proposed.Based on the actual highway inspection project,the pavement distress and the hidden distress in the depth of 1 m below the pavement of a two-way four-lane highway with a length of 38 km were studied.The overall situation of pavement distress and hidden distress and their spatial distribution were analyzed statistically by a pile interval of 100 m.The correlation between pavement distress rate and pavement structure distress rate was further explored.The results show that when the pavement distress is severe,there is a strong correlation between the pavement distress rate and the pavement structure distress rate.When the pavement distress index is low,internal hidden distress will also increase accordingly.At this time,there may be an accompanying relationship between the apparent and hidden distress of the pavement.In addition,with the gradual deepening of the occurrence of hidden distress,the associated pavement distress is more likely to occur.