湖泊群的生态修复与开发利用研究初探——以武汉东西湖区湖泊群为例

由于人口压力巨大,我国湖泊退田还湖总量有限.笔者从可持续发展的角度,提出大城市郊区现有的湖泊和湖泊群,应将主要功能转变为调节城市生态环境质量和发挥其在景观美学上的作用.笔者以武汉东西湖为例,对湖泊的生态修复和景观美学建设提出了具体建议.      

浅议我国东部矿区的生态重建技术

分析了引起华东地区矿区生态系统奴化的主要原因，并有针对性地提出了一些生态重建技术。其中包括：煤矸石、粉煤灰充填复垦，疏排法复垦，盐渍化土壤改良、水土流失防治，植被恢复和重建矿井废水治理等技术。这些技术是这一地区矿区生态重建技术体系中的主要技术。     

Field investigation of pavement rehabilitation utilizing cold in-place recycling

Despite the widespread field and laboratory research works there are still a lot of unknown aspects about the cold in-place recycling. This paper presents the outcomes of a five year evaluation of a major highway in Iran which had been rehabilitated by cold in-place recycling. Before starting the rehabilitation process, a comprehensive field survey was performed. During the pavement surveying, type, severity and reason of distresses were investigated and PCI parameter was calculated. Furthermore, both destructive and nondestructive tests were carried out to evaluate the pavement condition and estimate the remaining life. On the basis of these investigations studied highway was divided to six design sections. Based on technical analysis four sections were recycled whereas two other sections were rehabilitated with the conventional cold milling and overlay method. Afterwards, the pavement performance was monitored during the next 5 years. After about six months of monitoring, structural failures were detected in about 10% of recycled areas. Based on field surveying, low compaction and load bearing of subgrade materials and lack of high quality unbound pavement layers accompanied by some shortcomings in recycled layer resulted in undesirable results in these areas. Based on obtained results and performed analysis a practical flowchart was presented which could be used as a project selection guideline.