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以某厂区场地岩土工程勘察为例,结合该区域工程地质与水文地质条件,着重说明了场地地震效应分析与评价所需的基础资料和分析评价方法,以供岩土工程勘察工作者参考借鉴。 相似文献
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1.地震基础数据问题
汶川地震范围之广、灾情之复杂、次生灾害之多、损失之惨重、救助之困难,在历史上少见。在抗震救灾初期,一切工作都是围绕救人这个中心展开。进入受灾群众安置阶段,地震基础资料的收集工作,应尽快作为一项关键性工作加以重视。唐山大地震后,地震城市基础资料的抢救整理,为震后规划重建提供了第一手地质科学基础数据资料,目前重点要进行基础测绘1/1000数化地形图,地震基础数据,地震工程资料,场地安全评估,灾害影响背景(如重大次生灾害危险、重大地质灾害危险、 相似文献
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王力 《工程抗震与加固改造》2008,30(3)
从抗震角度讲,搞清工程场地及周围断裂位置及其活动性,对工程场地稳定性评价至关重要.本文在分析山东广电业务楼工程场地地震地质钻探、高精度断层气(Rn、Hg)测试和工程场地浅层人工地震探测结果的基础上,结合近场区断裂和地震活动性研究结果,对工程场地地震条件进行了综合评价. 相似文献
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就广木线穿心店站货运楼的震害特征及原因进行了分析,并对房屋基础隔震技术抗震原理、基本要求、优点及应用前景进行了介绍,希望对类似工程的设计起到指导作用。 相似文献
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High-resolution lidar-based landslide hazard mapping and modeling,UCSF Parnassus Campus,San Francisco,USA 总被引:1,自引:0,他引:1
William C. Haneberg William F. Cole Gyimah Kasali 《Bulletin of Engineering Geology and the Environment》2009,68(2):263-276
Airborne lidar (light detection and ranging) was used to create a high-resolution digital elevation model (DEM) and produce
landslide hazard maps of the University of California, San Francisco Parnassus Campus. The lidar DEM consisted of nearly 2.8
million interpolated elevation values covering approximately100 ha and posted on an 0.6 m horizontal grid, from which a set
of 16 maps was produced. The first subset of maps showed aspects of the topography useful for landslide mapping, an engineering
geological map and a qualitative slope hazard map. The second subset consisted of physics-based probabilistic landslide hazard
maps for wet static, wet seismic, and dry seismic conditions. This case history illustrates the utility of lidar-based products,
supplemented by field-based geological observations and physics-based probabilistic slope stability modeling, for the evaluation
of existing and potential slope stability hazards on a steep and heavily forested site.
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Ferit Cakir Eren Uckan Jay Shen Senol Seker Bulent Akbas 《The Structural Design of Tall and Special Buildings》2016,25(4):193-212
Historical structures and preserving their cultural values are crucial issues for humanity, not only because of their link to important certain periods in the past, but also their unique architectural features. Although many historical structures continue to offer services while keeping their historical values, some of them are at high risk in seismic prone regions. Therefore, the understanding of their structural performance under strong ground motions has been of significant importance to the civil societies as well as engineering community. The structural systems of historical buildings, generally, consist of masonry walls or piers. The behavior of such walls is controlled by either deformation or force. Seismic performance evaluation of historical structures can be carried out within the framework of performance‐based evaluation principles. This paper mainly discusses the basic principles to be considered in performance‐based seismic evaluation of historical structures. Proposed seismic hazard levels, evaluation of existing seismic hazard, selection of earthquake ground motions as well as site geology, geological and tectonic settings of the area, seismic activity of the region and local soil conditions are needed for a thorough performance evaluation. Seismic performance evaluation of a clock tower located in eastern Turkey was accomplished based on the proposed principles. Copyright © 2015 John Wiley & Sons, Ltd. 相似文献
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以青岛-兰州国家高速公路建设工程的地质灾害危险性评估工作为例,分别从现状评估、预测评估、综合评估等方面探讨了如何做好高速公路建设工程地质灾害危险性评估工作,对线型工程的评估工作具有一定的示范作用。 相似文献
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传统云图法和条带法计算工程需求概率危险性曲线(EDHC)时,存在地震危险性水平不可控、理想假设过多和计算成本较大等弊端。在第三代性态地震工程的框架思路下,对现有条带法进行改进,以条件目标谱作为记录选取依据,得到了考虑场址地震危险性特征的EDHC改进计算方法。采用自振周期约为1.0s的10层钢筋混凝土平面框架作为结构算例进行验证。以中国某场址地震安全性评价实例为设定地震解耦依据,构建不同场址地震动危险性水平下条件周期T=1.0s的条件目标谱簇。在进行多危险性水平下的记录选取后,采用改进条带法计算目标结构最大层间位移角和顶层位移的EDHC曲线。与传统云图法的计算结果对比表明,云图法的诸多假设在高地震动输入水平下并不严格成立,最终导致EDHC曲线在年超越概率不大于2%时被显著高估。而采用改进条带法的计算结果表明,即使采用与结构自振周期相关性较弱的0.01s作为条件周期进行后续调幅和选波,与基于Sa(T=1.0s)的EDHC计算结果依然可以保持较好一致性。研究结果证明:该方法可以控制各调幅条带下记录的地震危险性水平一致,且与选择的地震动强度指标无关,可以在计算工程需求概率危险性时合理考虑目标场址的地震危险性特性。 相似文献
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三门核电站60年基准期下的地震危险性分析 总被引:1,自引:1,他引:0
为研究三门核电站主厂房的抗震性能,确定设计基准期为60a厂址的地震动,进行了地震危险性分析。按工程建筑物抗震设计规范要求,选取三门核电站工作区域内的历史地震记录,并根据该地区地质构造情况划分了潜在震源,分别给出了设计基本期为60a时三门地区63%、10%、2%、0.2%和0.01%超越概率水平的峰值加速度,计算出地震动参数,为该核电站建设提供了抗震设计依据。分析结果表明:设计基准期为60a时,三门核电站厂址水平地震加速度峰值较小,且厂址所在区域地址构造条件相对简单,不具备发生中强地震的构造条件,适合三门核电站的建设。 相似文献
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对疏浚底泥的性质进行了分析,以渔港底泥堆场为例对堆场的工程性质做出了评价,说明了底泥的性质对其填埋场设计的重要性,表明做好填埋场的工程地质研究,对防止二次污染具有重要意义。 相似文献
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针对抽水蓄能电站工程包含工程枢纽多、涉及范围广,工程所处山区地质环境条件复杂的特点,对该类项目建设用地地质灾害危险性评估的评估级别、评估范围和场地分区进行了简要分析,阐述了其地质灾害危险性现状评估、预测评估、综合分区评估的要点,并对现状调查重点、报告编制、不良地质现象等技术问题进行了评述,以供参考。 相似文献
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《Planning》2014,(24)
The problems of environmental engineering geological in coastal zone mainly include earthquakes, collapse and landslide, etc. We selected eight major evaluation indexes from the influence factors of problems of environmental engineering geological in coastal zone, that is active fault, seismic activity and hydrological conditions, etc. Through the index of quantitative grading, constructing fuzzy comprehensive evaluation model,evaluation of environmental engineering geological stability in coastal zone, supplying a scientific method and gist for the more reasonable and effective development and utilization of coastal zone. 相似文献