HS模型在高原湖相沉积土层深基坑的应用

基于Hardening Soil模型,针对昆明市湖相沉积土层深基坑工程实例,采用MIDAS/GTS对湖相沉积土层中深基坑支护进行三维有限元数值模拟分析。主要研究高原湖相沉积土层中深基坑开挖过程基坑周边土体变形情况。结果表明,Hardening Soil模型可用于高原湖相沉积土层中深基坑工程的数值分析,采用Hardening Soil模型可以得到较符合实际的高原湖相沉积土层深基坑开挖变形规律。

Synthesis Analysis of Soil Erosion for Three-River Headwater Region Based on GIS

In this paper,based on the common soil erosion model,the Three-River Headwaters region was select for study object. GIS methods are applied to conduct Semi-quantitative assessment for different types of soil erosion,and some results are concluded. The water erosion occurs in High Mountain and extra-high mountain of Yushu,Nangqian,Banma and Jiuzhi County in the southeast and south of the Three-River Headwaters region. The degree of erosion is prone to topography,precipitation,river and human activity. The freeze-thaw erosion mainly distributes in the northwest of the Three-River Headwaters region. The area of middle and above middle erosion degree accounts for roughly 50%.

森林生态系统研究

根据森林生态系统的特点,并以单种栽培人工林为例讨论了与之相关的亚系统模型。