高速公路工程水土流失预测与分析实践

Soil and Water Loss of a Highway Project:Prediction and Practice

为验证《生产建设项目土壤流失量测算导则》(简称《导则》)对高速公路工程的适用性,运用《导则》对西南地区某高速公路工程建设进行水土流失预测,并与类比法测算结果进行对比。测算结果表明,路基工程区、附属设施区和弃渣场区是该项目土壤流失最多的区域,大部分土壤流失发生在施工期;采用《导则》与类比法得到的土壤流失量测算结果差异主要表现在工程开挖面区域,其余土壤流失类型下的测算结果差异较小;《导则》在线型工程水土流失预测中的运用稍显繁杂,而对于点状工程具有更强的实用性。

To verify the applicability of Guidelines for measurement and estimation of soil erosion in production and construction projects for expressway projects,the soil and water loss at an expressway project under construction in Southwest China was predicted based on the Guideline.The result was compared with that of the analogy method.Result shows that soil and water loss in subgrade engineering area,auxiliary facilities area and waste disposal sites are the most severe,and most of the soil erosion occurs in construction period.The difference of calculation results between the Guidelines and the analogy method is mainly reflected in the area of bare slope due to excavation of project,while other soil erosion types shows little difference.The application of the Guidelines in the prediction of soil erosion in linear projects is complicated but more practical for point projects.