共查询到20条相似文献,搜索用时 46 毫秒
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从设计施工、室内试验以及边坡稳定性验算等方面分析了某高速公路高填土路基纵向裂缝形成的原因,对路基边坡进行了稳定性分析计算,得出较为符合工程实际的结论。 相似文献
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随着三峡工程建设,三期移民工作正紧张的进行,由于移民安置的需要,在秭归形成了高切坡,高切坡的稳定与否直接影响着边坡附近居民的生命财产安全和公路的正常运营。本文分析了秭归某边坡的地质条件,在定性定量评价高边坡稳定性的基础上,进行了该高边坡的加固设计。该高边坡据其稳定性可分为两个子区,根据其特点分别采用抗滑锚杆、系统锚喷的治理措施。 相似文献
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结合某公司生产的船用回转起重机的整体结构,根据所提供的起重机臂架总图和部件图,应用大型有限元分析软件Ansys对臂架结构进行建模,按照臂架实际工作中所有可能的组合方式进行静力强度和稳定性分析,得到了臂架结构在各工况下的应力分布。通过有限元分析计算,发现了回转起重机臂架受力最大和发生应力集中位置,明确了臂架在最危险工况下的应力分布及失稳的屈曲模态。 相似文献
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鉴于简化B ishop法作为一种简单实用且精度较高的极限平衡方法却仅限于分析圆弧破坏的缺陷,提出将B ishop法应用于任意滑裂面的广义方法.基于极限平衡理论和简化B ishop法的简化条件,推导其用于一般滑裂面破坏的边坡安全系数计算公式.通过实例分析考证比较该法的精度,并提出取矩中心的确定方法,以保证竖向力简化假设下的精度,为土坡稳定性分析提供了一种简单通用的方法. 相似文献
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失地农民是近年来中国出现的新的困那群体,关系到国家的稳定和社会的发展,找到失地农民利益保障缺失的根源,进而探寻解决问题的利益诉求渠道,是具有一定的社会意义和现实意义的。 相似文献
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以巴东县大园子滑坡为例,根据滑坡的规模、影响因素以及滑坡的工程地质、水文地质条件,进行滑坡敏感性因子分析及稳定性分析评价。提出了有针对性的治理措施和滑坡监测的建议,为滑坡体的有效整治提供依据。 相似文献
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通过三峡库区近坝库殴八字门滑坡地质勘查、专业监测与环境影响因素监测及宏观地质巡查监测等资料分析,三峡水库蓄水、库水位涨落、大气降水的作用及人类活动的作用,是引起八字门滑坡变形主要影响因素;并在此基础上,通过计算对其稳定性进行了初步评价。 相似文献
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Tom Crandall 《Coastal management》2013,41(4):451-466
Abstract The San Diego Coast Regional Commission, faced with the responsibility of approving, approving with conditions, or denying permits for development proposed along the scenic coastal bluffs of San Diego county, has adopted guidelines for bluff‐top development which assures retention of scenic vistas and provision of public access while permitting private landowners “reasonable use”; of their property. These unique guidelines delineate certain environmental and aesthetic parameters within which bluff‐top development may take place. Portions of the guidelines are presented, and some of the factors leading to their formulation and adoption are discussed. 相似文献
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在混凝土施工中,特别是大体积混凝土浇筑过程中,出现裂缝是常见的问题.如何有效减少和避免裂缝的出现,减少因裂缝对工程质量影响和工程使用功能的影响具有重要意义.通过实际案例,对邵伯三线船闸闸室墙倒角产生裂缝原因进行全面分析,从设计、原材料采购与使用以及施工工艺等方面提出防治措施,经过实践验证效果显著. 相似文献
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Welded joints are commonly used for various structures such as civil engineering infrastructures or marine and submarine structures. It is well known that the geometry of the joints has an important influence on the stress concentration factor and thus on fatigue lifetime. Non-Destructive controls during welding work allow to keep parameters inside bounds and to satisfy quality requirements. However, the effect of the geometry characteristics within these bounds on the structural lifetime needs for a statistical analysis and a probabilistic modelling on the one hand and for a specific computational method on the other hand. When considering the first point, only few works have been carried out on the statistical analysis of the geometrical parameters of a welded joint. The measurement of the different parameters of this geometry is a long and scrupulous work. Recently, some laser process allows obtaining a significant quantity of trajectories along a welded joint for these geometrical parameters. This paper aims at analysing these trajectories for reliability purpose. This laser process allowed us to measure the width of the weld, the angle at the junction between weld and welded component and the radius at the weld toe. The study was completely performed for the two first but it was shown that the assessment of the radius remains challenging. 相似文献
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在海水环境下各种混凝土防腐蚀技术措施各有特点,适用场合有异,必须针对实际情况。采用多技术措施联合施治的方式,方能实现科学、合理、经济的防腐蚀耐久性设计。 相似文献
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Dimitris Servis George Voudouris Manolis Samuelides Apostolos Papanikolaou 《Marine Structures》2003,16(8):601-626
Bulk carriers are subject to SOLAS regulations concerning the structural integrity of hold No. 1. SOLAS Chapter XII Regulation 6 mandates that the transverse watertight bulkhead between the two foremost holds and double bottom of the foremost hold shall have sufficient strength to withstand flooding of the first hold. This regulation applies to all single-skin bulk carriers of 150 m in length and upwards constructed before 1 July 1999. IACS provides rules for the construction of these areas of such vessels in order to comply with SOLAS Chapter XII. This paper presents a methodology for modelling hold No. 1 of bulk carriers using finite elements in order to assess the structural integrity of these areas under the loads prescribed by IACS. Results from respective nonlinear analyses using IACS loads are also presented. 相似文献