城市,海洋及海岸带建设中的重大工程地质问题   总被引：1，自引：0，他引：1  

刘玉海 《水文地质工程地质》1997,24(2):39-42

本文对城市，海洋及海岸带建设的重大工程地质问题的研究进行了分析，总结，内容涉及及建筑场地岩土体工程地质问题，人工地基与深基基础工程地质问题，城市地质环境及工程地质问题，海洋及海岸带工程地质问题等。  相似文献   

固体废物安全填埋场选址技术方法研究   总被引：7，自引：0，他引：7  

赫英臣 《水文地质工程地质》1997,24(3):25-27

笔者根据参加国家“八五”科技攻关项目的示范工程“无锡工业有害废物安全填埋场”的选址工作，提出选址工作的技术方法和应进行的１０大技术环节，并给出选址技术方法流程和填埋场工程主要技术工艺流程图，这些研究成果将会促进安全填埋场选址技术的发展和环保工程的实施应用。  相似文献   

Assessment and zonation of regional crustal stability in and around the dam region of the Three Gorges Project on the Yangtze River   总被引：5，自引：0，他引：5  

Tan Chengxuan  Sun Ye  Wang Reijiang  Hu Daogong 《Environmental Geology》1997,32(4):285-295

 The scale of the Three Georges Project (TGP) on the Yangtze River ensures that it will have enormous social and economic consequences. Determining the safety of the TGP is an essential consideration, and conducting the assessment and zonation of regional crustal stability has a crucial role in determining the success or failure of the TGP in the future. In this paper, the assessment of regional crustal stability, places much emphasis on tectonic stability and the stability of partial foundations (rock and soil masses) and surface slopes (which include landslides, collapses, etc.) related to fracture activity is also taken into consideration. The evaluation and zonation of regional crustal stability was conducted on two scales and scopes: the dam region and the vicinity of the TGP (about 310 000 km²), and the dam region of the TGP (about 30 000 km²). On the basis of tectonic zonation and present crustal stress field analysis, fuzzy mathematics was used to perform quantitative and comprehensive evaluations of crustal stability, and then the zonation of crustal stability in the study region, combined with a theoretical geological study, was made. The results of the assessment and zonation of the crustal stability can be summarized as follows: (1) the general crustal stability of the dam region is in a less stable-stable state and the Sandouping dam site is on a relatively stable landmass; and (2) the Sandouping dam site is on an ancient integrated granite body belonging to a stable (I) landmass. Therefore, from the view of assessment and zonation of regional crustal stability, a large-scale hydropower station can be constructed at Sandouping. Received: 8 September 1995 · Accepted: 25 February 1997  相似文献   

Mg-Cr~(2+)橄揽石、辉石和尖晶石的晶胞参数测定及Cr~(2+)在各晶体结构中的占位     

李建平  HughSt．C．O’Neill 《矿物学报》1995,(4)

本文用Mg－Cr2+做榄石、辉石、尖晶石的粉晶X射线衍射数据，采取“整体图谱最小二乘Rietveld”方法计算了上述矿物的晶胞参数和摩尔体积，并对Cr2+在各晶体结构中的占位情况进行了研究。结果显示，各矿物的晶胞参数随含Cr2+量的增大而增大。据Vegard定律，推算出各端元组分铬橄榄石（Cr2SiO1）、铬辉石（Cr2SiO2O6）及立方铬尖晶石（Cr3O4）的摩尔体积分别为47．7，68．0，44．9cm3。精化结构参数指示，在橄榄石中，Cr2+随机分配在两个八面体（M1，M2）位置；在辉石中，Cr2+优先选择八面体M2位置；在尖晶石中，Cr2+占置四面体位置。这种晶体内离子分配可从离子半径差别或晶体场稳定能大小得到解释。  相似文献   

土体地震反应分析的简化有效应力法   总被引：6，自引：1，他引：6  

陈国兴  谢君斐 《地震工程与工程振动》1995,15(2):52-61

本文提出了一个计算二维土体地震反应的简化有效应力法。该方法将整个地震特时分成若干时段，对每个时段用等效线性迭代进行次线性分析，等效剪应变幅值取该时剪应变均方根值的√２倍。  相似文献   

大型桥梁场地断层活动性识别标准的研究     

李起彤 《国际地震动态》1993,(4):11-14

  相似文献   

矿山工程地质问题   总被引：1，自引：0，他引：1  

周淑举 《水文地质工程地质》1993,20(1):27-31

本文论述了我国近年来在矿山工程地质研究中所面临的问题及进展,分5个方面进行论述:(1)采矿、选矿工业场地,(2)井巷工程;(3)尾矿处理场地;(4)露天矿边坡;(5)矿山环境工程地质。  相似文献   

碳氟磷灰石的位置群分析     

黄作良 《吉林大学学报(地球科学版)》1990,(2)

本文借助于磷灰石的晶体结构资料,用位置群分析的方法,讨论了碳氟磷灰石的晶体结构与它的红外光谱间的关系,并从位置群的角度分析了CO_3~(2-)的存在形式及可能的位置对称。  相似文献   

A check-up on seismic hazard assessment: Tirana case study     

Siasi Kociaj  Arben Pitarka 《Natural Hazards》1990,3(3):293-303

Based on the data of consequences of the 9 January 1988 earthquake that hit Tirana city, a comparative study is made of these consequences with the seismic hazard assessment by microzoning studies finished on the eve of this earthquake. It is shown that the methodologies used to assess the seismic hazard by engineering geology, geophysical, instrumental and analytical methods, follows the same trends as the distribution of the consequences of this earthquake.Paper presented at the 21st General Assembly of the European Seismological Commission, Sofia, 1988.  相似文献   

The information content of high-frequency seismograms and the near-surface geologic structure of “hard rock” recording sites     

Edward Cranswick 《Pure and Applied Geophysics》1988,128(1-2):333-363

Due to hardware developments in the last decade, the high-frequency end of the frequency band of seismic waves analyzed for source mechanisms has been extended into the audio-frequency range (>20 Hz). In principle, the short wavelengths corresponding to these frequencies can provide information about the details of seismic sources, but in fact, much of the signal is the site response of the nearsurface. Several examples of waveform data recorded at hard rock sites, which are generally assumed to have a flat transfer function, are presented to demonstrate the severe signal distortions, includingf _max, produced by near-surface structures. Analysis of the geology of a number of sites indicates that the overall attenuation of high-frequency (>1 Hz) seismic waves is controlled by the whole-path-Q between source and receiver but the presence of distinctf _max site resonance peaks is controlled by the nature of the surface layer and the underlying near-surface structure. Models of vertical decoupling of the surface and nearsurface and horizontal decoupling of adjacent sites on hard rock outcrops are proposed and their behaviour is compared to the observations of hard rock site response. The upper bound to the frequency band of the seismic waves that contain significant source information which can be deconvolved from a site response or an array response is discussed in terms off _max and the correlation of waveform distortion with the outcrop-scale geologic structure of hard rock sites. It is concluded that although the velocity structures of hard rock sites, unlike those of alluvium sites, allow some audio-frequency seismic energy to propagate to the surface, the resulting signals are a highly distorted, limited subset of the source spectra.  相似文献