金安桥水电站渣场边坡植物防治灌草种的选择

工程边坡植物防护的主体是植物，灌草种选择需以气候条件、边坡坡度、弃渣特性等为基础。以金沙江干流河道金安桥水电站同时具有明挖和洞挖弃渣的2#渣场为例，通过渣场边坡可绿化条件分析，对植物措施灌草种进行选择确定。弃渣颗粒径级分析结果显示，洞挖边坡弃渣颗粒〉4mm的粒径组成百分含量为91．63％，〉2mm颗粒的累计百分含量高达96．75％，比农地表土层同径级颗粒含量分别高48．87和27．45个百分点，保水保肥能力差，植物防治绿化前需覆土改良。10种灌草种发芽和播种试验结果表明，明挖边坡弃渣的发芽率和苗木保存率最好，木豆的发芽率和保存率最高；明挖弃渣播种后发芽率在60％以上，56d苗木保存率〉80％的6种灌草种的适应性依次为：木豆、大翼豆、狗牙根、麻风树、银合欢和车桑子，均可用于渣场边坡植物防治灌草种，满足渣场边坡的防护要求。

Selection of Shrub and Grass Species for the Side-slope Plant Protection at Dumpling Pile of Jin'anqiao Hydropower Station

The basis of the side-slope plant prevention is plant.Selection of shrub and grass species for the side-slope plant prevention at the dumpling pile of hydropower station need to consider synthetically the weather conditions,the gradient of side-slope,the character of the dumpling and the planting purpose,etc.Taking the 2# dumpling pile as the example which include both the open-cut and hole dumpling at the Jin'anqiao Hydropower Station on the main river-way of Jinsha River,the analysis is conducted to the a...