Assessment of the effects of climate change on the performance of pavement subgrade
Assessment of the effects of climate change on the performance of pavement subgrade
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DOI：
10.1080/20421338.2015.1023649
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发表时间：
2015-03
期刊：
影响因子：
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通讯作者：
Muzi Bonginhlanhla Mndawe;J. Ndambuki;W. Kupolati;A. A. Badejo-A.;R. Dunbar
中科院分区：
文献类型：
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作者：
Muzi Bonginhlanhla Mndawe;J. Ndambuki;W. Kupolati;A. A. Badejo-A.;R. Dunbar
这项研究调查了未来气候变化对南非路面寿命的影响，通过模拟长期存在的水分在路面路基。该研究是在uMkhanyakude区的P435和P443公路上进行的。气候数据收集自科学和工业研究理事会（CSIR）和气候系统分析小组（CSAG）1940 - 2001年，并模拟了2012 - 2062年。采样工作采用《公路技术方法》（TMH）5所述的标准程序进行，并根据TMH 1进行土壤实验室测试。室内试验结果表明，根据材料的加州承载比（CBR）和塑性指数（PI），将材料分类为G10。P435和P443公路路基层的CBR试验分别获得了91.4%和94.3%的相对压实度。研究表明，未来50年将带来一个气候变化的信号，在降水方面将是最小的。然而，自然天气变化可能成为主要信号。路面寿命已被证明会以威胁道路类别和设计可靠性的方式减少。
This research investigated the effects of future climate change on pavement life in South Africa by simulating prolonged moisture presence in the pavement subgrade. The study was conducted on roads P435 and P443 within uMkhanyakude District Municipality. Climatic data were collected from the Council for Scientific and Industrial Research (CSIR) and Climate Systems Analysis Group (CSAG) from 1940 to 2001 and simulated from 2012 to 2062. Sampling was done using the standard procedure described in Technical Methods for Highways (TMH) 5 and soil laboratory tests carried out according to TMH 1. Results of laboratory tests classified the materials as G10 based on their California bearing ratio (CBR) and plasticity index (PI). Relative compaction of 91.4 and 94.3% were obtained from the CBR test on the subgrade layers of roads P435 and P443 respectively. The research showed that 50 years into the future will bring a climate change signal that will be minimal in terms of precipitation. However, natural weather variability threatens to be the dominant signal. The pavement life has been shown to decrease in a way that would threaten the road category and design reliability.