铁路施工中处理岩溶塌陷的几点认识   总被引：3，自引：0，他引：3  

刘辉 《地质灾害与环境保护》1998,9(3):62-64

根据多年来从事铁路岩溶塌陷调查和整治的经验,阐述对铁路工程施工中岩溶塌陷的机制和整治措施的几点初步认识。  相似文献   

广东省道S362线番禺沙湾至紫坭段软土特征及处理措施     

徐利成  谢色新 《湖南地质》2002,21(3):201-206

阐述了省道S362线番禺沙湾至紫坭段软土路段的物理力学性质及软土地基处理措施，并对各种处理措施进行比较。  相似文献   

地震CT与FBG传感器技术在隧道结构诊断中的应用   总被引：1，自引：0，他引：1  

李丹  李川  赵永贵  刘昌 《工程地质学报》2008,16(6):839-843

针对飞鱼泽隧道的上行线二衬拱顶靠档墙处出现裂缝,经地震CT技术查清隧道上所覆盖岩体的工程地质结构结果表明,沿隧道轴向存在三个岩体破碎带,其中在小里程入口段,岩体完整性较差。在隧道病害治理和隧道健康监测中,经光纤Bragg光栅（FBG）传感器的监测结果表明,松散破碎岩体的地质情况得到了相应的加固。因此,地震CT和FBG两者的检测结论是相互印证的。  相似文献   

Elimination of Swimming Pool Water Disinfection By‐products with Advanced Oxidation Processes (AOPs)     

Thomas Glauner  Fabian Kunz  Christian Zwiener  Fritz H. Frimmel 《洁净——土壤、空气、水》2005,33(6):585-594

Ozonation is a treatment step which was first applied in the 1960s in pool water treatment for disinfection as well as for oxidation of pool water contaminants. Contact time between ozone and pool water was identified to be of significance with an increased elimination efficiency regarding chloramines, trihalogenmethane formation potential and the permanganate index for longer reaction times. Oxidation via OH radicals might be the dominating pathway. In this study ozonation was compared with the ozone based advanced oxidation processes ozone/UV and ozone/hydrogen peroxide regarding the elimination efficiency of both disinfection by‐products (DBPs) and DBP precursors. It was observed that AOPs in comparison to ozonation showed an increased elimination efficiency regarding total organic carbon (TOC), the organically bound halogens adsorbable on activated carbon (AOX) and AOX formation potential. A contact time of 3 minutes between pool water and oxidant turned out to be practically sufficient. Just for the trihalomethane (THM) formation potential ozonation showed a slight advantage compared to the AOPs because ozonation is a highly selective oxidant and OH radical reactions are known to produce small reactive molecules which are easier transformed to THMs. Combination of membrane filtration and AOPs resulted in an elimination of 10 to 90 % of the DBPs and their precursors. The ozone/hydrogen peroxide process is suggested for pool water treatment because of the higher elimination rates compared to ozonation and of economic reasons compared to the ozone/UV process.  相似文献   

结合边坡形态分析高边坡边坡稳定性问题   总被引：1，自引：0，他引：1  

宋文博 《地下水》2003,25(3):191-193

下坂地水利枢纽工程右坝肩高边坡的稳定性，对大坝及水库运行安全影响很大，结合工程地质条件，采用边坡形态及结构面综合分析、评价边坡的稳定性，提出了工程处理具体措施。  相似文献   

气象卫星接收处理系统用于地震短临预测的开发研究          下载免费PDF全文

徐秀登  徐保华 《地震工程学报》2004,26(4):322-327

介绍了在利用气象卫星热红外异常作地震短临预测的探索中，如何开发已有的气象卫星资料分析处理系统来捕捉、确定和提取地震前兆异常，分析震兆异常时空演变规律，计算地震“三要素”指标，建立地震预测思路。  相似文献   

Deforestation-induced costs on the drinking water supplies of the Mumbai metropolitan,India     

《Global Environmental Change》2014

The success of incorporating natural capital into resource- and land-use decisions hinges on the ability to quantify the ecosystem services, forecast the returns to the investments, convert these values into effective policy and finance mechanisms, and the presence of well-functioning institutions and infrastructure. However, ecosystem production functions i.e., the relationship between regulatory functions of the ecosystem and the economic activity it protects or supports are often poorly understood. Even with respect to Forest Watershed Services – a service that is widely recognized and even institutionalized through market based mechanisms in some parts of the world – the biophysical relationships between forests and services such as stream flow stabilization, water quality and water quantity are undefined, particularly for the tropics. For this reason, this study through time series data and multivariate analysis characterizes the relationships between Forest Cover (all lands with tree cover of a canopy density of 10% and above when projected vertically on the horizontal ground with minimum areal extent of 1 ha), water quality and cost of water treatment in the Western Ghats of peninsular India. In particular, the recursive relationship between the economic and environmental components is estimated by tracing the effects through the two-stage model. Annual value of impacts (increased ‘treatment cost’, increased ‘water losses due to backwash and desludging’, and changes in ‘water yield’) induced by loss of Forest Cover is estimated as 64.96 Indian rupee/m³ treated water/ha/year ($1.32/m³ treated water/ha/year). At an annual rate of change in the forest cover by −0.0088% (average annual rate of change in the forest cover between the years 1994–2007) the deforestation induced costs translate to 3.73 million Indian rupee/year ($0.075 million/year) according to the 2010–2011 prices for the Panjrapur treatment plant of the Municipal Corporation of Greater Mumbai. Thus, if deforestation is avoided the Municipal Corporation can save significant amount towards recurring costs of water treatment and to some extent mitigate the costs for the development of a new source.  相似文献   

UASB处理猪粪废水启动试验研究   总被引：1，自引：0，他引：1       下载免费PDF全文

王阳 《气象与环境学报》2007,23(2):34-37

通过UASB反应器处理猪粪废水试验,研究了UASB处理猪粪废水的启动过程。在水浴35℃时,接种处理啤酒废水的厌氧颗粒污泥,通过控制较低的表面水力负荷,经逐步驯化66 d,完成了启动过程。结果表明:UASB反应器对COD的去除率为88.5%,其容积负荷达到10.9 kg/(m3.d),SS去除率为90.0%或以上。试验可为农村地区资源化技术提供一定的科学依据和借鉴。  相似文献   

自动气象站出现不正常后的分析与处理   总被引：7，自引：0，他引：7  

胡建国  姚培建 《气象与减灾研究》2005,28(3):59-60

针对自动气象站出现的一次故障进行了分析,并介绍了故障排除的方法,以及故障排除后数据处理时应注意的问题。实践结果认为,不到万不得已不要轻易进行采集器复住,采集器复位要避开正点进行,且要特别注意做好原始数据的备份与释放工作。  相似文献   

基于数值模拟与含水层垂向应力反演的静乐井水位异常分析     

张淑亮  李宏伟  吕芳  陈慧 《震灾防御技术》2019,14(4):854-868

利用数值模拟与含水层垂向应力反演的方法,对降雨与河流荷载作用下静乐井区应力进行定量计算,并从区域应力场与同一构造区其他前兆测项变化特征对2种方法计算结果进行分析。数值模拟结果显示,降雨与河流荷载的共同作用使静乐井所在区域产生的最大垂向位移约为0.7mm,最大垂向应力约为30hPa;同时段静乐井-含水层垂向应力反演结果显示静乐井-含水层最大垂向应力约为79hPa;数值模拟与静乐井-含水层垂向应力反演结果均表明,静乐井水位高值异常与同时段降雨量增多、河流荷载效应增强关系密切,但2种结果存在一定差异。通过可反映井区应力场变化特征的山西地震带3级地震缺震和b值、穿过静乐井的GPS基线、地震矩释放、同一构造单元同时段其他前兆测项与静乐井水位高值异常对比等分析结果可知,2017年静乐井水位高值异常期间井区应力场存在显著异常,推测静乐井水位高值异常除受降雨与河流荷载作用的影响外,也可能受构造活动增强的影响。  相似文献