川西地区古堰塞湖相地层边坡生态防护研究

Research on Ecological Protection of Paleo-dammed Lake Deposit Slopes in Western Sichuan

川西地区古堰塞湖相地层为一套主要由粉砂质黏土、粉细砂等组成的半胶结特殊地层,力学强度较低,土壤贫瘠且较密实,开挖后边坡往往存在局部垮塌与自然植被恢复困难等问题,需做综合性的生态防护研究。通过调查分析该区自然环境,提出了以羊茅、箭竹等乡土植物为主的草、灌等相结合的植物配置方案,并针对坡比与稳定性不同的4类边坡,结合其地质与土壤特征,分别给出了相应的以稳定性防护为基础、土壤改良重建为核心的生态防护模式。

The paleo-dammed lake deposit,mainly consisting of silty clay and silty sand,is a kind of special strata with poor mechanical strength and fertility and is usually well compacted.Because of the problems like local collapse and the difficulties in restoring vegetation,comprehensive ecological protection research should be conducted on excavated slopes.Through the investigation and analysis of the natural environment in the region,a combination of grass and irrigation configuration program that based on fescue,bamboo and other native plants is proposed.Also,we divide the slopes comprising of paleodammed lake deposits into 4categories according to their slope ratio and stability.Combining with the geological and soil characteristics,specific ecological protection models based on stability improvement and soil reconstruction are given.