对黄土基本动力特性的认识   总被引：2，自引：0，他引：2  

吕立强  邵生俊  龙吉勇 《地下水》2007,29(6):109-111

黄土高原是多地震地区,黄土体的地震灾害是工程建设中迫切需要解决的工程问题.依据人们对我国黄土动力特性的研究成果,阐述了黄土的动强度特性、黄土的循环动应力应变特性、震陷变形特性及黄土场地震害小区划研究,从而为正确地认识黄土工程的地震灾害提供基础.  相似文献   

阜新城市垃圾填埋场对地下水污染的研究     

隋淑梅  徐颖  孙健  王亮 《化工矿产地质》2007,29(4):232-236

随着我国城市化的发展,城市生活垃圾产量剧增,垃圾渗滤液对地下水的污染问题已成为当前主要的水环境污染问题。通过对阜新市城市垃圾填埋场地理、地质和气候特征的调查,结合阜新市城市发展现状,分析了阜新市城市垃圾填埋场垃圾成分,渗滤液产生量及渗滤液中污染物的浓度,得出了阜新市城市垃圾填埋场渗滤液中各种污染物污染地下水的源强度。采用数值模拟的方法,对垃圾渗滤液污染地下水的情况进行模拟分析,验证了模拟方法的正确性,并对今后的污染情况进行了预测分析。  相似文献   

Choosing a municipal landfill site by analytic network process   总被引：2，自引：1，他引：2  

Mufide Banar  Barbaros Murat Kose  Aysun Ozkan  Ilgin Poyraz Acar 《Environmental Geology》2007,52(4):747-751

In this study, analytic network process (ANP), one of the multi-criteria decision making (MCDM) tools has been used to choose one of the four alternative landfill sites for the city of Eskisehir, Turkey. For this purpose, Super Decision Software has been used and benefit opportunity cost and risk (BOCR) analysis has been done to apply ANP. In BOCR analysis, each alternative site has been evaluated in terms of its benefits, costs and risks; the opportunity cluster has been examined under the benefit cluster. In this context, technical, economical and social assessments have been done for the site selection of sanitary landfill. Also, results have been compared with analytic hierarchy process (AHP) which is another MCDM technique used in the study conducted before. Finally, the current site has been determined as the most appropriate site in both methods. These methods have not been commonly used in the discipline of environmental engineering but it is believed to be an important contribution for decision makers.  相似文献   

Estimation of seismic spectral acceleration in Peninsular India   总被引：6，自引：0，他引：6  

S. T. G. Raghu Kanth  R. N. Iyengar 《Journal of Earth System Science》2007,116(3):199-214

Peninsular India (PI), which lies south of 24°N latitude, has experienced several devastating earthquakes in the past. However, very few strong motion records are available for developing attenuation relations for ground acceleration, required by engineers to arrive at rational design response spectra for construction sites and cities in PI. Based on a well-known seismological model, the present paper statistically simulates ground motion in PI to arrive at an empirical relation for estimating 5% damped response spectra, as a function of magnitude and source to site distance, covering bedrock and soil conditions. The standard error in the proposed relationship is reported as a function of the frequency, for further use of the results in probabilistic seismic hazard analysis.  相似文献   

二维复杂工程场址设计地震动的修正分析方法     

杨笑梅  郭钦华 《世界地震工程》2007,23(2):112-117

地震安全性评价中工程场地设计地震动通常采用一维等效线性化水平成层的分析模型，但对一些较复杂的场地条件，如蓄能电站所处场地，仅考虑一维场地是不够的，而需考虑二维场地的影响。常规采用的二维有限元很难考虑诸多因素，为工程设计带来了很大的困难。提出了可考虑二维复杂工程场地影响的设计地震动的修正分析方法和简化方法，该方法还可考虑非线性对场地的影响及吸能边界等因素，而且计算简单，并易于同常用的一维等效线性化方法结合。实例分析结果合理，对工程场地地震动的确定具有重要意义。  相似文献   

液化大变形条件下地铁车站结构动力反应大型振动台试验研究   总被引：3，自引：0，他引：3  

庄海洋  陈国兴  杜修力  李亮  左熹 《地震工程与工程振动》2007,27(4):94-97

本文对浅埋于可液化南京细砂地基中的地铁车站结构的大型振动台试验结果进行了进一步的整理,主要分析了地铁车站结构侧向地基土发生液化大变形时车站结构的应变反应、加速度反应和土与结构侧墙之间接触面的动土压力反应,结果表明:地铁车站结构侧向土体发生液化大变形时,地基土的大变形造成地铁车站结构中柱和侧墙都发生较大的不可恢复的残余变形;在侧墙底部记录的动土压力反应幅值明显比中部和顶部处记录的值要大,中板处的峰值加速度都比底板处的对应值要大。  相似文献   

防震减灾信息网信息收集与编审     

梁凯利  马玉香  李红  钟普浴 《国际地震动态》2007,(1):36-38

防震减灾信息网是面向社会为民服务的窗口,信息收集和编审是保障其服务质量的重要环节,本文对此进行了探索。  相似文献   

国外城市垃圾填埋场岩土工程研究的最新进展   总被引：5，自引：2，他引：3  

熊孝波  施斌 《工程地质学报》2000,8(3):345-350

介绍了国外在垃圾填埋场衬垫层、覆盖系统 (帽子 )、垂直隔离墙及土工布等方面的最新进展.  相似文献   

Seasonal variation of particulate organic compounds in atmospheric PM₁₀ in the biggest municipal waste landfill of Algeria   总被引：1，自引：0，他引：1  

Riad Ladji  Noureddine Yassaa  Angelo Cecinato  Brahim Youcef Meklati 《Atmospheric Research》2007,86(3-4):249-260

The average composition and seasonal variations of atmospheric organic particulates with respect to n-alkanes, n-alkanoic acid, polycyclic aromatic hydrocarbon (PAHs), and nitrated polycyclic aromatic hydrocarbons (N-PAHs) were determined at the biggest municipal waste landfill in Algeria located in Oued Smar, 13 km east of downtown Algiers. Samplings were carried out from August 2002 to February 2003, and organic compounds adsorbed in air particles having an aerodynamic diameter lower than 10 μm (PM₁₀) were characterized using gas chromatography coupled with mass spectrometric detection (GC/MSD). Total concentrations ranged from 828 to 11,068 ng per cubic meter of air for n-alkanes, from 1714 to 21,710 ng per cubic meter of air for n-alkanoic acids, from 13 to 212 ng per cubic meter of air for PAHs and from 93 to 205 pg per cubic meter of air for N-PAHs. n-Alkanoic acids accounted for 85 and 56% of the total organic composition of the aerosol measured in summer and winter, respectively, were the biggest fraction. The distribution profiles and the diagnostic ratios of some marker compounds allowed to identify the combustion and microbial activity as the major sources of particulate organic pollutants associated with direct emission. The year-time dependence of organic fraction content of aerosol in Oued Smar appeared to be related to average meteorological conditions as well as variability of rate and nature of materials wasted into the landfill.  相似文献   

岩溶地区垃圾渗透液中36种挥发性有机物的测定     

全洗强  陶鑫  秦愫妮  杜文越  俞建国  郭永丽 《中国岩溶》2018,37(6):925-931

应用吹扫捕集-气相色谱-质谱法测定岩溶地区垃圾渗透液中36种挥发性有机物（VOCs）的含量。获取样品溶液5 mL于吹扫瓶中,利用TELEDYNE TEKMAR型吹扫捕集直接进样,经DB-VRX毛细管色谱柱分离、电子轰击电离（EI）全扫描检测,选择特征离子,再用外标法进行定量测定。结果表明:36种挥发性有机物的质量浓度在1～100 μg·L-1 范围内,与其峰面积呈线性关系,方法检出限在0.03～0.27 μg·L-1 之间,加标回收率在88%～110%之间,相对标准偏差（n=7）在2.32%～6.51%之间。   相似文献