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We will investigate the actuality of stony deserts in Guizhou, and divide their types on the basis of their intensity, covering rate of soil and vegetation and amount of species, and stduy the influence factors of forming different stony desert types in more coercing, and explore the ratio of influence factors in the different stony desert areas and the evolutionary mechanism of different stony desert types. Finally,we will stduy the growing conditions and species of arboreous in different geology, land form,hydrology region for natural lithogenic forest and artificial forest, and the natural conditions for failing in many artificial forest,and the reconstruction mechanism in different stony desert type regions.

对贵州石漠现状调查,并根据石漠发育强度、土被、植被覆盖率和物种多少等进行石漠类型分类;对多重胁迫下不同石漠类型形成因子研究,探讨各影响因子在不同类型石漠区的权值;探讨各类型石漠演化机理;选取不同地质、地貌、水文背景区的原生岩生森林及人工造林区对其乔木的立土条件及物种研究;选取贵州经多次造林失败的石山的自然条件研究并探索不同类型石漠区生态重建机理。

Under coaction of endogenic geological processes and water and heat conditions, the drainage development, and water formation and transformation in the inland watershed. were indicated hydrological characteristics of periglacial zone. The hydrological process is mainly related with to changes in mountain areas. It by 41% of precipitation in mountain areas as surface discharge flows into middle and lower reaches, which makes up a main physical basis of the quantitative and qualitative relationship for various functional units in the eco-system in mountain front plain.

在内动力地质、水热条件的共同作用下,内陆河流域上游山区的水系发育、水的形成和转化反映出冰缘带水文学特征,水文过程主要和气候变化相关联,山区降水总量的41%以地表径流形式输入中下游地区,构成山前平原生态系统各功能单元数量与质量关系的主要物质基础。

It tells particularly the debris flow"s the encironment and the development characteristic by numbers . And according to its character , selecting the latest research results at present , the anthor calculates the debris flow"s the moving , dynamical characteristics and the scale , such as , the velocity of flow , the wallop , the peak value flux , and the total flux . And the anthor calculates density in different design frequency by the empirical formula method . In the text, the author uses the modle of evaluating a single gully to evaluate the risk of the debris flow . First , the author calculates the hazard degree in different design frequency , and forecasts the risk range of debris flow in Shenjia gully based on the maximum pile thickness and the total solid amount of a denbris flow . Then , on the basis of the risk range in different design frequency , the author carries out the damageability and risk assessment . The basic purpose of risk management is reducing risk or transferring risk , reducing the loss of life and property . The text constructs the system of risk management of debris flow in Shenjia gully , basis on the condition of Shenjia gully .

本文从地形地貌、地层岩性、地质构造、气象水文等方面系统地阐述了深家沟泥石流的发育环境及发育特征;分别从形成区、流通区、堆积区对深家沟流域特征进行描述;依据泥石流沟自身特点,选用现阶段最新的研究成果,推算了不同设计频率下的深家沟泥石流流速、峰值流量、总流量、冲击力等动力特征和规模数据;并且根据经验公式法来确定深家沟不同设计频率下的泥石流容重;本文采用单沟泥石流风险评价模型对深家沟泥石流进行风险评价,首先对不同的设计频率下的深家沟泥石流进行危险度评价,根据最大堆积厚度与一次泥石流冲出量来预测不同频率下的泥石流危险范围,然后,根据预测的评估范围,评价对应范围内的易损度,最后作出风险评价;城镇泥石流风险管理的根本目的是降低风险或转移风险,减少生命财产的损失,本论文根据泸定深家沟泥石流的具体情况,构建了深家沟泥石流风险管理体系。

To discuss the feasibility of applying this technique into the practice of engineering, this paper references the real project of the running tunnel from Great Showplace to Scientific House in Shenzhen Metro, uses the geotechnical centrifuge of Southwest Jiaotong University, then researches the settlement of the ground and the influence on the pipeline underground in stratum with abundant water by the technique of undraining spin-spay pile, at last draws a conclusion about the principle of the ground settlement with the construction method of excavating soil rich in water without dewatering at Shenzhen Metro.

为了探讨离心模型试验技术这一研究手段在地下工程中应用的可行性,结合地质、水文、结构较为复杂的深圳地铁大~科区间暗挖施工SK3+355断面的具体实例,应用我校新近建成的100gt土工离心试验机,采用离心模型试验技术对在富水地层应用水平旋喷桩工艺进行控制降水施工对地表沉降变形及地下管线的影响进行了研究。

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