Site Investigation for the Effects of Vegetation on Ground Stability     

John R. Greenwood  Joanne E. Norris  Jo Wint 《Geotechnical and Geological Engineering》2006,24(3):467-481

The procedure for geotechnical site investigation is well established but little attention is currently given to investigating the potential of vegetation to assist with ground stability. This paper describes how routine investigation procedures may be adapted to consider the effects of the vegetation. It is recommended that the major part of the vegetation investigation is carried out, at relatively low cost, during the preliminary (desk) study phase of the investigation when there is maximum flexibility to take account of findings in the proposed design and construction. The techniques available for investigation of the effects of vegetation are reviewed and references provided for further consideration. As for general geotechnical investigation work, it is important that a balance of effort is maintained in the vegetation investigation between (a) site characterisation (defining and identifying the existing and proposed vegetation to suit the site and ground conditions), (b) testing (in-situ and laboratory testing of the vegetation and root systems to provide design parameters) and (c) modelling (to analyse the vegetation effects).  相似文献   

地下水中硝基苯污染的防控技术—泥浆回灌法构筑阻截墙     

李绪谦  马莉  蒋惠忠  宗芳  李爽  刘利 《吉林大学学报(地球科学版)》2006,(Z1)

硝基苯污染可使地下水环境质量急剧恶化。利用阻截墙控制地下水中的硝基苯污染范围的扩大,是控制地下水环境继续恶化的经济、有效方法之一。以粘土、沸石、铁粉、硫酸钙等与水调配成泥浆,利用压力向井中回灌,将泥浆注入到含水层中,可有效地阻截地下水中硝基苯的扩散。  相似文献   

The chromite deposits associated with ophiolite complexes, Southeastern Desert, Egypt： Petrological and geochemical characteristics and mineralization     

Gehad M. Saleh 《中国地球化学学报》2006,25(4):307-317

1 Introduction The association of massive Fe-Ni-Cu sulfides andchromite is a very unusual feature of podiformchromitites occurring in mantle tectonites of ophioliticcomplexes. It has only been described in theSoutheastern Desert, Egypt, where sulfides a…  相似文献   

浅谈省级地震系统如何做到开发富局     

季颖锋 《福建地震》2006,(Z1)

作为公益性财政拨款事业单位,省级地震系统实现开发富局,应该要从稳定项目收入,拓展自营收入,培育和发展生产点,推进制度创新着手。本文试图从预算和管理的角度对其作一点简单分析。  相似文献   

Evolution from Oceanic Subduction to Continental Collision: a Case Study from the Northern Tibetan Plateau Based on Geochemical and Geochronological Data   总被引：41，自引：0，他引：41  

SONG  SHUGUANG; ZHANG  LIFEI; NIU  YAOLING; SU  LI; SONG  BIAO; LIU  DUNYI 《Journal of Petrology》2006,47(3):435-455

Two apparently distinct, sub-parallel, paleo-subduction zonescan be recognized along the northern margin of the Tibetan Plateau:the North Qilian Suture Zone (oceanic-type) with ophioliticmélanges and high-pressure eclogites and blueschistsin the north, and the North Qaidam Belt (continental-type) inthe south, an ultrahigh-pressure (UHP) metamorphic terrane comprisingpelitic and granitic gneisses, eclogites and garnet peridotites.Eclogites from both belts have protoliths broadly similar tomid-ocean ridge basalts (MORB) or oceanic island basalts (OIB)in composition with overlapping metamorphic ages (480–440Ma, with weighted mean ages of 464 ± 6 Ma for North Qilianand 457 ± 7 Ma for North Qaidam), determined by zirconU–Pb sensitive high-resolution ion microprobe dating.Coesite-bearing zircon grains in pelitic gneisses from the NorthQaidam UHP Belt yield a peak metamorphic age of 423 ±6 Ma, 40 Myr younger than the age of eclogite formation, anda retrograde age of 403 ± 9 Ma. These data, combinedwith regional relationships, allow us to infer that these twoparallel belts may represent an evolutionary sequence from oceanicsubduction to continental collision, and continental underthrusting,to final exhumation. The Qilian–Qaidam Craton was probablya fragment of the Rodinia supercontinent with a passive marginand extended oceanic lithosphere in the north, which was subductedbeneath the North China Craton to depths >100 km at c. 423Ma and exhumed at c. 403 Ma (zircon rim ages in pelitic gneiss). KEY WORDS: HP and UHP rocks; subduction belts; zircon SHRIMP ages; Northern Tibetan Plateau  相似文献   

低阻油气储层测井解释方法研究     

LI Zheng-xi 《吉林大学学报(地球科学版)》2006,(Z2)

对低阻油气储层的测井响应特征和储层物性特征进行了研究,并针对研究区域低阻储层的特点,以岩心与测井数据的相关性为依据,提出了适合地区特点的储层参数解释方法。通过应用三水导电模型,提高了低阻储层的测井解释精度。  相似文献   

A preliminary study on interaction of Hg and Se in Sedum alfredii Hance     

《中国地球化学学报》2006,25(B08):127-128

  相似文献   

关于卫星应用专业设置及其定位的若干思考     

李征航  魏二虎  黄劲松  罗佳 《测绘信息与工程》2005,30(2):47-49

介绍了国内外卫星应用的现状、社会需求及相关专业的设置情况,提出了对我校设置卫星应用专业及其定位的若干建议,说明了设置该专业的必要性、存在的困难及其对策。  相似文献   

图像数据挖掘软件原型系统的设计与开发   总被引：2，自引：0，他引：2  

秦昆  王新洲  张鹏林  傅晓强 《测绘信息与工程》2005,30(6):1-2

提出了图像数据挖掘软件原型系统的设计与开发的试验框架,阐述了其设计与开发方法,介绍了各个模块的功能、设计与开发情况。  相似文献   

用旅游图制作导航电子地图中的地图纠正     

宁莹  潘正风 《测绘信息与工程》2005,30(6):20-21

介绍了一种用三次插值样条对公开出版的旅游图进行纠正,制作汽车导航电子地图的方法,分析了其中存在的问题,提出了解决的办法。  相似文献