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1、（一）Abstract: The karst mud limestone of Triassic Badong formation (T2 b) is the serious engineering geological problem newly discovered in the population resettlement project in the Three Gorges Reservoir region. There are very complex structures in mud limestone, involving old structures, new struc
2、tures and surface deformation structures, which coordinately control the karstification. In the old structures, the local structures such as folds and fault zones control the important segments and layers of karstification; and the mini structures such as joint and layer face popularize the karstifi
3、cation. The surface uplift and river cutting in new tectonic period put forward the unload and loose of rock mass, widening of karstification paths. The surface deformation structures densify the karstification paths and intensify the karstification. The mechanism of karst hazards yields to the regu
4、lation of structure controlling over karstification in mud limestone terrain, Three Gorges Reservoir region , which brings about hazards with features of broad range , huge scale and complex structure. The types of karst hazards involve uneven subsidence, fissure, landslide, collapse, mudflow and ca
5、ve in. 三峡库区三叠系巴东组(T2b)泥灰质岩石岩溶是移民迁建中发现的重大工程地质问题。泥灰质岩石中的构造非常复杂,包括老构造、新构造和表生构造,它们共同控制了岩溶作用。老构造中,褶皱和断裂带等局部构造控制着岩溶的重要部位和重要层位,节理和层理等小构造使岩溶普遍存在。新构造时期 地表隆升和河流切割使岩体卸荷松动,岩溶通道扩宽。表生岩溶构造加密了岩溶通道,使岩溶作用增强。三峡库区泥灰质岩石斜坡带岩溶灾害的形成机理遵循着构造控制下岩溶发育的规律性,致使岩溶地质灾害具有范围广、规模大和结构复杂的特点。岩溶地质灾害的形式包括地面不均匀沉降、地裂缝、滑坡、崩塌、泥石流和地面塌陷。（二）Abstra
6、ct：Harm of concealed karst geological disaster lies in its properties of concealment and outburst; karst and soil-cave related with cause of formation, coexist with engineering environment, find out its development and distribution features, calculate karst geological disaster, analyze and handle di
7、rectly sub grade and foundation engineering problems，which are focal point works of geological engineering investigation. The problem of bridge foundation type select and ground treatment which were combined with engineering example in karst were analyzed in this paper.隐伏岩溶地质灾害的危害在于其隐蔽性和突发性,岩溶与土洞成因上
8、相关联,工程环境中共存,查明其发育及分布特征,预测岩溶地质灾害,有针对性的分析处理地基基础问题,是岩土工程勘察的重要工作内容。本文结合工程实例对隐伏型岩溶地区桥梁基础选型与地基处理问题进行分析。（三）Abstract: Landslide is a primary geology disaster and one of most popular studying project all over the world. It is difficult to forecast and is controlled with high cost, for its forming condition,
9、acted factors, variation of movement mechanism are complicated. In recent 20 years, there is the fast progress on environmental and geology disaster study, and remediation and forecast on landslide disaster also have been developing at home and abroad. This paper summarizes current situation and dev
10、elopments of landslide study at home and abroad in recent 20 years.滑坡作为一种主要地质灾害, 由于其产生的条件、作用因素、运动机理的多样性、多变性和复杂性, 预测的困难, 治理费用的昂贵, 一直是世界各国研究的重要地质和工程问题之一。近20 年来, 是环境和地质灾害研究比较快的一个时期, 国际上研究和防治滑坡灾害空前活跃, 各项研究进一步扩展和深入, 防治工程措施在已有措施的基础上进一步完善, 监测预报方面也有了巨大发展。本文对二十年国内外滑坡研究的现状及动态做一简单的回顾。（四）Active faults are the p
11、laces that are most easily damaged in the crust, but also are the biggest places that cause deformations and displacements. Inspecting acting faults has an important practical significance to forecasting developing tendency and lightening the calamity of the earthquake. By researching two cross sect
12、ions in Linfen and Hongtong, the paper reveals the relations about active faults and earthquakes. And if will serve for Shanxi earthquakes forecast.活动断层是地壳最易破坏的地方,也是发生形变和位移最大的地方.通过对活动断层的观察,对于预测地震的发展趋势、减轻地震灾害具有重大的现实意义.本文通过对临汾、洪洞两个剖面的观察研究,揭示活动断层和地震的关系,为山西的地震预报提供服务.（五）Abstract: Starting with the format
13、ional mechanism of faulting, the relationship between faults and tectonic stress field is discussed. Based on the data of faults, the orientation of maximum principal stress in the region of Gansu is calculated. The study results show that the orientation of compressive principal stress is N E and t
14、he modern tectonic stress field is in keeping with geotectonic stress field and seismic stress field. So it is considered that the geotectonic stress field in the investigated area since Neogene has always been kept relative, which may be due to the collision between the Eurasian and Indian plates.从
15、断裂的形成机制入手讨论了活断层与构造应力场的关系, 利用断层资料计算了甘肃地区的主压应力方向. 结果表明, 主压应力为北东向. 新构造应力场、现代构造应力场、地震应力场趋于一致. 认为晚第三级以来, 甘肃地区地壳构造应力场相对稳定, 应该是印度板块与欧亚板块相互作用的结果.（六）Abstract：The Three Gorges Project (TGP) on the Yangtze River is the largest water resources project in the world; it is now attracting the worldwide attention.
16、Possessing comprehensive utilization benefits mainly for flood control, power generation and navigation improvement, TGP will be a vital important and backbone project in harnessing and developing of the Yangtze River. The Three Gorges Reservoir has been formed initially ; in pace with the water level raising , the storage capacity enlarged ; the possibility of reservoir induced earthquake also raised ; the highest intensity of induced earthquake would be less than , and no influence
