共查询到20条相似文献,搜索用时 15 毫秒
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Over the past few decades, many optical fiber sensing techniques have been developed. Among these available sensing methods, optical fiber Bragg grating(FBG) is probably the most popular one. With its unique capabilities, FBG-based geotechnical sensors can be used as a sensor array for distributive(profile) measurements, deployed under water(submersible), for localized high resolution and/or differential measurements. The authors have developed a series of FBG-based transducers that include inclination, linear displacement and gauge/differential pore pressure sensors. Techniques that involve the field deployment of FBG inclination, extension and pore-pressure sensor arrays for automated slope stability and ground subsidence monitoring have been developed. The paper provides a background of FBG and the design concepts behind the FBG-based field monitoring sensors. Cases of field monitoring using the FBG sensor arrays are presented, and their practical implications are discussed. 相似文献
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对影响隧道长期沉降的因素进行了分析,对隧道的纵向长期变形形态、纵向差异变形曲率、隧道纵向变形与隧道渗漏的关系等进行了研究,研究显示,隧道的长期纵向变形受隧道外部荷载、隧道自身的结构特点、隧道的渗漏水状态等条件的影响,总体上需要较长的时间才能趋于稳定,且对环境变化较为敏感。 相似文献
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通过对变形监测网平差基准的选择及参考点位稳定性分析,提出了在绝对网中采用固定基准平差,采用平均间隙法进行点位稳定性分析;在相对网中采用稳健迭代权法找到平差基准,采用单点位移分量法进行点位稳定性分析。通过实践监测数据表明:采用上述方法进行监测数据处理,能够得到最符合真值的监测点位变形量。 相似文献
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根据某露天矿边坡工程实例,运用有限单元法软件MIDAS/GTS对该边坡进行变形稳定性分析.在分析中采用强度折减法,求得安全系数为1.06,边坡处于不稳定状态.采用预应力监测锚索对该边坡进行加固监测.加固后安全系数提高到1.50以上,说明预应力监测锚索对边坡起到了有效的加固作用.同时记录边坡滑动力和位移数据,分析得到滑动力在监测当中逐渐趋于稳定,位移随着时间的推移也慢慢趋于平稳.同时发现位移监测的可靠性难以满足需求,在以后的监测当中采用以滑动力监测为主,位移监测为辅的措施.最后指出预应力监测锚索在边坡的稳定加固和边坡滑动失稳预测方面可靠有效. 相似文献
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以武吉高速公路修水连接线南岭隧道为例,对隧道进出洞过程中的监测数据进行了分析,结合隧道边坡监测数据的经验总结,将隧道进洞过程中的边坡位移发展分为5个阶段,对本隧道的边坡监测成果进行了阶段总结. 相似文献
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介绍了光纤传感技术的研究和应用现状,对边坡监测中可应用的光纤传感器进行了分析研究,并对各种光纤应变监测技术进行了比较,指出了光纤传感技术必将成为工程监测的首选. 相似文献
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监测网的稳定性直接关系到测绘成果和其他地理信息数据的准确性和现势性。本文简要介绍了方差分析的基本思想和进行方差分析的数据正态性和齐次性检验方法,对基于方差分析理论构造F检验统计量的方法进行了研究,并采用近7年监测成果对原点监测网内基岩水准点高程变化和近4年的地铁控制网平面变化进行了假设检验和稳定性分析,结果表明该方法是可行的。 相似文献
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Achim Menges 《Architectural Design》2006,76(2):42-53
For two decades, the individual members of the SmartGeometry Group have pioneered innovative computer-aided design (cad) techniques and technologies. Now that they are situated in key positions in internationally renowned companies, the group is involved in developing a new generation of parametric design software. Here, Robert Aish (Director of Research at Bentley Systems), Lars Hesselgren (Director of Research and Development, kpf London), J Parrish (Director of ArupSport) and Hugh Whitehead (Project Director of the Specialist Modelling Group, Foster and Partners, London) discuss with Achim Menges the group's instrumental approach to geometry and their unique collaboration spanning the world of practice and software development. Copyright © 2006 John Wiley & Sons, Ltd. 相似文献
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Robert B. Kent Richard E. Klosterman 《Journal of the American Planning Association. American Planning Association》2013,79(2):189-198
The widespread availability of geographic information systems (GIS) and computer mapping software allows individuals with little or no cartographic knowledge and experience to prepare maps for planning purposes. While these maps are often satisfactory, they may not fully serve their intended purposes. This article identifies some of the most common mistakes that planners make in preparing maps and suggests ways to avoid them. It introduces some key considerations in map making and offers a series of practical tips that will help planners produce more effective maps. 相似文献
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阐述了岸坡稳定监测的意义,详细地介绍了岸坡稳定监测的主要内容及监测步骤,提出了监测的质量保证措施,以及时了解岸坡稳定状况,从而保证工程施工顺利进行。 相似文献
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