德钦县城地质灾害成因及治理效益评价

分析德钦县城地质灾害多发原因,针对特殊的地质环境采取的灾害治理的措施取得的治理效益评价。     

攀枝花地区冰期膨胀土的工程特性研究

攀枝花地区冰期膨胀土生成于二冰期晚期中更新统冰期,通过室内和现场物理力学试验和分析,揭示攀枝花地区冰期膨胀土的物理力学性质具有很大的离散性,其性质受土体的矿物成分、含水率、裂隙面、埋藏深度、级配、试验条件等因素、条件的影响.试验研究表明:膨胀土中的裂隙面按光滑程度不相同,可分为两种类型,即光滑裂隙面和光滑擦痕裂隙面;粗...     

常州市工程地质数据库智能系统建设中需解决的关键问题

常州市工程地质数据库智能系统建设,主要解决的关键问题是：针对常州工程地质条件,制定常州市标准化地层;结合底图来源和底图精度要求,完成矢量图配准校正工作;针对系统建设地质条件、服务的功能目标,选择合适的标准和规范;结合常州市工程地质特征,建立工程地质和地下空间资源评估指标体系;针对建筑物地下基础勘查工作的复杂性,制定地下空间竖向影响深度的研究方法。     

江苏环境地质工作四十年回顾与展望

从20世纪50年代末以来,江苏的环境地质工作经历了寻找地下水资源及区域性基础水文地质、工程地质勘察,城市水文地质、 工程地质、环境地质勘察,全省市、县地下水资源评价,环境地质及地质灾害防治研究,走向市场直接为国民经济建设服务等发展阶段.它在国民经济建设中发挥了极其重要的作用,并在各方面取得了很大发展.     

设计地震反应谱的双参数标定方法及其应用

近年的工程地震工作,如地震小区划、重大工程场地的危险性分析等,一般都要做设计谱标定。既反映局部场地条件,又反映地震环境的双参数标定设计谱的方法,已为工程界接受。作为该方法的应用,本文采用澜沧——耿马地震的强震资料,重新确定了设计反应谱的形状参数,给出了反映云南地区地震特性的设计谱,可供中、小型工业与民用建筑抗震设计时参考使用。     

用浅层地震折射波法探测桥梁隧道所在地的基岩和构造

本文以广(州)—深(圳)高速公路(E)段的桥梁、隧道工程勘测为例,阐述了利用浅层地震折射波法在勘查断裂位置、基岩面产状,波速及岩性分布方面的应用。所得结果表明,该方法用于工程建设的选线、选址和概查是有效的。     

微机在软土工程地质勘察中的应用

本文介绍微机在软土地区工程地质应用程序的编写方法,为的是完成工程地质勘察报告所必须进行的资料整理、计算统计、绘图等一系列繁琐的人工操作,既省时省力,对加快勘察行业的自动化有一定的实际意义。     

在测绘工程专业课中采用双语教学的研究与实践

根据与欧美国家测量员一起工作的经验和双语教学实践,论述了测绘工程专业双语教学的必要性和可行性,指出了双语教学计划制定的依据,讨论了测绘工程专业双语教学活动的组织方法,提出了双语教学方法,同时也分析了师资建设和教材建设等重要问题。     

Access to the coast and erosion control: use of wastes on local engineering works in the coast of Gaza City

 Investment in the coastal resources of Gaza City is vital to various developmental issues and projects. Access to the coast and coastal erosion represent two major geo-environmental problems to the city. This paper describes local engineering works developed by the municipality and local people to overcome such problems. A cliff of calcareous sandstone – Kurkar as it is locally known – (up to 18 m high), is located at a distance of 20–50 m from the water–land contact. People who need to reach the beach must cross this Kurkar cliff. The engineering works used to facilitate access to the beach are: old automobile tires, white waste skeletons (refrigerators) and construction waste, where long stairs were designed using these materials. Meanwhile the engineering works which were used as erosion control measures include: rock gabions, concrete wastes, construction waste, concrete walls and shallow excavations. Such practices are commonly used in third world countries and are characterized by inexpensive transportation and implementation costs. The performance of these methods was evaluated from an economic, environmental and safety point of view. Suggestions were made to improve the performance of these practices in the future. Received: 18 November 1998 · Accepted: 15 February 1999     

Structural Topology Design of Container Ship Based on Knowledge-Based Engineering and Level Set Method

Knowledge-Based Engineering (KBE) is introduced into the ship structural design in this paper. From the implementation of KBE, the design solutions for both Rules Design Method (RDM) and Interpolation Design Method (IDM) are generated. The corresponding Finite Element (FE) models are generated. Topological design of the longitudinal structures is studied where the Gaussian Process (GP) is employed to build the surrogate model for FE analysis. Multi-objective optimization methods inspired by Pareto Front are used to reduce the design tank weight and outer surface area simultaneously. Additionally, an enhanced Level Set Method (LSM) which employs implicit algorithm is applied to the topological design of typical bracket plate which is used extensively in ship structures. Two different sets of boundary conditions are considered. The proposed methods show satisfactory efficiency and accuracy.