There are two main innovate ideas in the dissertation . ( 1 ) supported by the results from the method of limit analysis of soil plasticity and the ultimate equity method , the author proposes the criterion of judging of stability of slope of foundation of a building 本文的创新点主要有：采用塑性极限分析和极限平衡方法，通过计算，提出了黄土地区宅基边坡的稳定性评价标准，即人工谷缘的坡度不得大于天然坡度。
By analyzing the runoff and sediment characteristics of tao river basin , it can be concluded that the main sediment - yield region is loess area between lijia village and hongqi zone where sediment yield in flood season ( june to september ) is more than 81 percent of the mean averaged over years 分析了流域水沙特性：洮河流域泥沙的主要产地是李家村-红旗区间的黄土地区；汛期( 6 - 9月)输沙量占多年平均的81以上。
In this paper , 8 - node isoparametric quadrilateral element is used to divide the soil and retaining structure . comparing to practical engineering , the numerical method - finite element method is used to analyze every behavior of deep foundation excavating and retaining in loess area 本文采用八结点四边形等参元来离散土体与围护结构，用有限元数值方法，对照实际工程，对黄土地区深基坑开挖与支护体系的各种性状进行了分析。
According the data of actual project and integrating the approximately earth pressure of loess area , this thesis compile a series of lanzhou loess area support program with c + + and the method of criterion . analyzed and calculated many actual projects with the program , monitoring the procedure and collecting the data in some works to perfect the program and work hard to make it to sale . according cantilever supporting pile , one - anchored supporting pile and soil nails support of loess area , this thesis select the best support method and structure form 本文从实际工程出发，根据规范中的极限荷载设计法结合黄土地区深基坑的近似实际土压力分布情况，用c + +语言编制一套适合兰州地区黄土深基坑支护的计算机辅助设计程序，用本程序分析计算了多个实际工程，并在这些实际工程的基坑开挖过程中实行信息监测，收集有关数据以回归检验研究成果以及完善这套程序，使其能真正的应用到实际工程，并力争使其商品化。
Analyzing the composite foundation bearing capacity reduction coefficient of soil among piles by data gathering from practice engineering ; providing some advice and a regional experimental extent of selecting the bearing capacity reduction coefficient of soil among piles for designing composite foundation with cfg piles in loess area according to investigating results , with which give the designer a material to consult 根据实际工程中采集的实验数据，对复合地基桩间土承载力折减系数进行了讨论分析，根据实验研究结果，给出了黄土地区的cfg桩复合地基设计中桩间土承载力折减系数的一个区域性的经验取值范围，并对cfg桩复合地基的设计提出了一些建议，可供工程设计人员参考。
Under this circumstance , it is necessary to find out the engineering characteristics , collapsible features and thickness , cause of the formation and the distribution of the loess , so as to determine the collapsible types of the site and the collapsible classification of the foundation and then to carry out the the foundation treatment in accordance with the requirement of the project design 在湿陷性黄土地区进行工程建设，应查明黄土的工程特性，湿陷性质、厚度、成因及其分布变化，确定场地湿陷类型和地基湿陷等级，并按工程设计的特性需求，进行地基处理等研究是十分必要的。
Abstract : taking the project of xi " an training center of finance cadre as an example , an idea about selecting plans of ground treatment on intricate field in the collapsible loess district is expounded , the process of selecting plans of ground treatment in connection with the project of xi " an training center of finance cadre is introduced . the reverse silting of the compacting hole on wet soft loess field is discussed tentatively in view of its mechanism 文摘:以西安市财政干部培训中心工程为实例，论述了湿陷性黄土地区复杂场地地基处理方案的选择思路，介绍了该工程地基处理方案的选择过程，对湿软黄土场地的挤密孔回淤现象进行了机理探讨。
Including the main body of the subgrade , protecting and supporting engineering . drainage equipment of road , culvert and the transition zone between the road and the bridge . through investigating the types of diseases , the author discusses the existing problems and causes of producing diseases , puts forward the protective measures in design and construction , and raises the treatment measures in highway maintenance , which makes it more scientific and perfect for highway construction and maintenance in the loess areas 论文首先对黄土的工程特性及其影响因素进行了分析，然后对黄土地区路基病害及其防治技术进行了研究，具体包括路基主体、防护与支挡工程、公路排水设施、涵洞及路桥过波段等部分，对病害类型进行了调查，分析了使用中存在的问题与病害产生的原因，提出了在设计与施工中应采取的防范措施，给出了养护中的处治对策，使我国黄士地区公路建设与养护更加科学和完善。
Separately select and use the slice method based on rigid body theory of ultimate equilibrium and the ai theory based on neural network to justify loess side slope stability and finite element numerical stimulation based on elastoplastic theory to further research the factors of slope failure and deformation mechanism of landslide 分别采用基于刚体极限平衡理论的条分法和基于神经网络的人工智能理论判别黄土边坡稳定性；又采用基于弹塑性理论的有限元数值模拟，进一步探讨了黄土地区边坡失稳的影响因素及其滑坡变形机制。
Based on the research of influencing factors and regularities of distribution of loess side slope stability in northwest , the author select pingshuo antaibao southern spoil bank as subject investigated , and abstract several the most rudimental influencing factors which are ubiquitous concerning slope stability in loess area such as sloping shape , slope ratio , bulk density , cohesive force , angle of internal friction , elastic modulus , poisson ratio , water immersion 本文在探讨黄土地区边坡稳定性的影响因素及其分布规律的基础之上，选取平朔安太堡南排土场为研究对象，抽象出对于黄土地区边坡稳定性具有普遍意义的几个最基本影响因子：坡型、坡比、容重、内聚力、内摩擦角、弹性模量、泊松比、水。
