开发建设项目挖方坡面冻融侵蚀监测调查与评价——以白山热电有限责任公司新建工程水土保持监测为例

Achievement and Evaluation of Freeze-thaw Erosion Monitoring in Exploitation and Construction Project——A Case Study of Soil and Water Conservation Monitoring in the New Construction Project by Baishan Thermoelectricity Co.,Ltd.

冻融侵蚀对北方地区来说一直是一个重要的研究课题,但也是一个容易被忽视的对象。对开发建设项目来说,冬季由于施工停止,阶段扰动量小,降水以降雪为主,没有地表径流,往往认为不存在水土流失。在冬季主要针对挖方坡面和填方坡面进行了测钎侵蚀量定点监测,该季节产生了较为严重的冻融侵蚀,但较大的危害主要存在于挖方边坡和填方边坡,对较为平整的厂区影响比较小(影响小旨在说危害小,并不代表侵蚀量小)。开发建设项目冬季冻融侵蚀,虽然在代表性上较差,但在局部点上仍然说明了一定的问题。

Freeze-thaw erosion is an important research topic to the north regions of China, and however, it is also an easily neglected object. For the exploitation and construction projects, soil and water loss is usually not thought to occur in winter because of ceased construction work, less stage disturbance, snowfall dominated precipitation, and seasonally disappeared runoff. We carry out a fixed-point erosion monitoring by the drill rod method on both excavated slope and filled slope in winter in order to investigate the influence of freeze-thaw erosion on exploitation and construction project. Results from monitoring and investigation show that more serious freeze-thaw erosion occurs in the stage. The bigger harm is mainly found on excavated slope and filled slope. The influence on the flat factory area is less （less influence means less harmful, not a small quantity of erosion）. This paper briefly discusses freeze-thaw erosion in exploitation and construction project. It may be worse in representation, but it provides a reference to future works since it still explains some problems partly.