基于Revit的基坑工程造价计算插件开发与应用研究

针对目前Revit软件对基坑工程造价计算功能的缺失,提出将基坑工程建筑信息模型(BIM)全过程构件族类化,并利用Revit API二次开发技术实现基坑工程造价自动化计算。首先,利用Revit平台建立基坑工程BIM模型构建族类库,实现基坑工程支护结构族类参数化;然后,对基坑工程造价计算流程进行分析,利用Revit API二次开发技术自动获取基坑工程项目BIM模型中各类构件参数,并结合基坑工程造价计算公式,实现实际工程量计算、定额套用、数据的显示与输出等功能;最后,以长沙市某基坑工程为例,开展实际工程项目的自动化造价计算,验证上述基于Revit的基坑工程造价计算插件的可行性。结果表明,本文开发的Revit造价计算插件可以基于导入的基坑工程BIM模型实现自动化造价计算,且与人工计算结果吻合良好。这一技术的实现,弥补了Revit软件在基坑工程造价计算以及基坑工程造价方面功能的不足,提高设计人员的工作效率,为进一步扩展BIM技术在基坑工程中的应用打下良好基础。     

BIM技术在超大深基坑进度管理中的应用

根据BIM软件的功能特点为深基坑工程选用合适的BIM处理方案。依据实际工程案例尝试选择Autodesk Revit进行模型构建,Autodesk Navisworks Manage进行施工可视化模拟。基于BIM技术的超大深基坑工程进度管理方法可有效减少甚至避免深基坑工程施工过程中存在的工期拖延、重复性劳动、效率低下等问题,对提高施工技术和管理水平具有重要的实践价值。     

融合三维地质体的Revit精细化基坑建模

首先通过正交试验优选出Revit基坑支护结构模型无缝连接Civil真三维地质体模型的融合方案,解决了当前Revit难以直接创建真三维地质体模型的难题;在此方案基础上,探索并总结出一系列诸如桩、锚、面层等常用基坑支护结构的精细化建模方法;最后结合实际工程案例,对基坑支护综合模型在辅助设计方面做了BIM理念下的初步应用研究:周边环境条件三维具现与漫游展示,支护结构与周边已建地下预制桩碰撞检查,工程量精确统计,不同支护结构空间交界节点设计优化,地下水位面、软弱风化基岩面及淤泥层三维空间展布状态剖切观察,导出可用于指导精确测量放线的二维CAD支护桩位平面图等。     

基于BIM技术的工程算量软件浅析

基于BIM技术的三大工程算量软件综合对比和BIM设计软件应用现状分析,选择广联达算量软件和Revit设计软件作为研究对象。在工程实例中,将Revit与广联达算量软件组合进行工程算量,通过土方工程、混凝土工程、砌筑工程、装修工程、门窗工程和钢筋工程六大部分的算量分析,证明Revit+广联达算量软件组合不仅准确度高,而且可避免重复建模,实现一模多用。进而分析该组合应用过程中出现的软件兼容性问题、数据转换问题以及算量规则规范化问题,并推广BIM技术在工程算量的应用研究。     

基于Revit的隧道参数化建模研究

与建筑工程相比,隧道工程具有呈带状分布、工程体量大的特点。现有的BIM参数化建模方式不适合隧道建模。基于此,通过对参数化建模的分析,提出了隧道参数化建模解决方案。该方案基于Revit平台建立隧道族库,运用可视化图形编程软件Dynamo编辑生成隧道模型的程序,并在实际工程中验证了该方案。该隧道参数化建模方案提高了建模效率,并符合实际工程建模需求。     

BIM技术在青岛贝林自然博物馆改扩建项目施工管理中的应用

以青岛贝林自然博物馆项目为例,使用Revit和Trimble Tekla软件建立全专业模型,使用该模型审查二维施工图,并优化施工方案。利用BIM技术来对管线排布方案进行优化,满足净高要求后,对管线进行碰撞检查,解决了管线碰撞和管线预留洞口的问题;建模人员严格按照预先定制的标准进行BIM模型的建立,该模型可直接提取工程量,从而对材料进行精细化管理;施工过程中,施工人员可以结合2D施工图和3D模型来深化对项目复杂节点的理解,并通过逆向建模技术定期检查施工质量,进而保证了质量和工期,产生了良好的经济效益。     

基于BIM的井下水泵房三维建模技术研究及应用

为了将煤矿井下复杂的巷道系统以直观、立体的方式展现出来,帮助设计人员全面准确地了解工程情况,提高设计精确性。通过对现阶段煤矿行业BIM技术应用进行广泛调研,以煤矿井下水泵房为例,探讨了基于BIM设计软件的井下水泵房三维建模设计流程及思路,建立了水泵房硐室模型、管道模型及设备模型,并给模型赋予相应属性,在此基础上对各模型参考组装以及渲染,对所创建模型的功能用途做了介绍,体现了BIM技术的先进性。相关的应用研究为BIM技术在煤矿行业中推行提供了参考。     

基于Web3D技术的煤矿BIM模型集成及可视化研究

针对煤矿数字化及BIM技术的应用现状,研发了基于开源三维引擎的Web3D可视化平台,以免插件、轻量化和跨平台的技术路线要求,对比主流基于WebGL的开源三维引擎框架,设计符合BIM模型可视化要求的矿用要素类数据描述结构管理信息模型。开发实现基于三维引擎的场景管理、模型可视化渲染和二三维界面融合功能,并基于现有相关BIM标准进行文件解析,将模型和属性信息的集成、转换和轻量化处理,利用Revit、AutoCAD、Civil3D、Bentley、NavisWorks等不同领域BIM设计和建模软件进行模型检验和集成,最后在Web3D可视化平台进行模型发布与可视化展示。提出了面对煤炭行业BIM技术应用亟待解决的问题、关键技术路线及组件,总结了跨煤矿设计、建设、运营不同阶段的BIM模型应用价值和应用场景。     

基于Web3D技术的煤矿BIM模型集成及可视化研究

针对煤矿数字化及BIM技术的应用现状，研发了基于开源三维引擎的Web3D可视化平台，以免插件、轻量化和跨平台的技术路线要求，对比主流基于WebGL的开源三维引擎框架，设计符合BIM模型可视化要求的矿用要素类数据描述结构管理信息模型。开发实现基于三维引擎的场景管理、模型可视化渲染和二三维界面融合功能，并基于现有相关BIM标准进行文件解析，将模型和属性信息的集成、转换和轻量化处理，利用Revit、AutoCAD、Civil3D、Bentley、NavisWorks等不同领域BIM设计和建模软件进行模型检验和集成，最后在Web3D可视化平台进行模型发布与可视化展示。提出了面对煤炭行业BIM技术应用亟待解决的问题、关键技术路线及组件，总结了跨煤矿设计、建设、运营不同阶段的BIM模型应用价值和应用场景。     

桩锚支护在深圳某软土地层基坑支护中的应用

就桩锚支护形式在深基坑工程中存在的不足,基于深圳某软土地层基坑支护工程的相关资料,进行了该基坑工程安全支护设计研究,根据其监测数据,重点分析了其阳角处的监测数据规律,采用有限元软件——Midas/GTS对阳角附近的基坑设计进行了优化研究,并论证了方案的可行性。     

Current situation and future trend of China rare earth luminescent materialindustry(continued)

<正>Developing ecological lighting source The world is facing the big problem of energy shortage today and the contradiction between economy development and environmental protection is worsened.Therefore,people are more likely to choose an ecological light source that is more energy efficient and environmental friendly.The choice provides great opportunity for the development of rare earth optical material industry in China.The concept of green lighting positions rare earth luminescent material as a leading player in illumination market.The light source of both rare earth luminescent lamp and LED lamp is ecological and energy saving.This is why     

Galaxy Magnets achieved the net profit of 34.02 million yuan in the first six months of 2014

正Galaxy Magnet announced its financial results for the first half of 2014 on August 14.For the first six months ended on 30 June 2014,Galaxy Magnet achieved operation income of RMB 182.3 million,up8.40% over the same period of 2013,and the net profit attributable to the shareholders of the listed company of 34.02 million yuan,increasing 35.49% over the same period of last year.Stable performance increase was led by development of new customers and application market of magnets.     

Rare Earth Application in Steel in China

<正>China has rich rare earth resources.Output of rare earth and steel in China ranks the top first in the world.However,there is still certain distance between the steel produced in China and developed countries from the point of varieties and quality.China still has to import some types of steel.Improving the quality should be emphasiZed in future development of steel industry in China.Rare earth can be used to upgrade traditional steel     

China rare earth market review

正November 21~30,2014Due to weak demand from downstream industries,transactions of rare earth in Chinese domestic market were inactive.It was difficult to sell any rare earth products except for dysprosium oxide and terbium oxide.Suppliers lost confidence in recent market.Demand for rare earth products was soft.Consumers continued to take a wait-and-see attitude.Rare earth export market remained slow.     

稀散金属产业的观察与思考

分析了近年来国内外稀散金属产业的生产、应用、资源与市场状况.铟锡氧化物靶材、砷化镓晶片、锗红外材料、铼高温合金和硒在电解锰及玻璃的应用等已成为稀散金属的主要应用领域.稀散金属的产量快速增长达到历史高位而导致了市场的失衡.以GaInP_2/GaAs/Ge,CIGS和CdTe为代表的非硅系太阳能电池是稀散金属的新兴应用领域,将给稀散金属带来日益增长的需求.     

Current situation and future trend of China rare earth luminescent material industry

<正>Rare earth luminescent material is one of the most important application sectors of rare earths.China enjoys the exceptional advantage to develop rare earth luminescent material for its abundant rare earth resources.After several decades'endeavor,China's rare earth luminescent material industry,headed by rare earth phosphor for lamp and LED and high efficient rare earth energy-saving light source,has been gradually developed into a scale industry.China has become a major production base of rare earth phosphor for lamps and rare earth     

China rare earth market review

正June 1~10,2014Rare earth market remained weak.Quoted price of rare earth products was similar to that in May.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,polishing powder and ceramic industries remained inactive.Demand from downstream industry was soft.Consumers purchased on their needs.Suppliers had strong intention to sell.Prices of rare earth products     

Annual Report analysis of Chinese rare earth-related listed companies in 2013

<正>Chinese rare earth-related listed companies have published their 2013 annual reports.It can be understood from their reports that production and operation activities of Chinese rare earth-related companies were still heavily affected by macro economy and industrial policies.They basically followed the steps of national economy.In 2013,world economy recovered slowly but the economy     

Market opportunities and challenges for rare earth polishing powder

正1.Status of rare earth polishing powder Rare earth polishing powder with high content of cerium oxide began to replace iron oxide for glass polishing and became one of the key materials in glass polishing process since 1940.Compared with traditional iron oxide,rare earth polishing powder has many advantages,such as fast polishing rate,high polishing quality and long service life.It can achieve good surface quality and improve operation conditions.For example,in lens polishing,the polishing work that cerium     

Baotou Research Institute of Rare Earths developed a new RE alloy preparation technology

正Pyrometallurgy Laboratory of Baotou Research Institute of Rare Earths had independently developed a new preparation technology of rare earth alloy for NdFeB.The alloy can remarkably enhance the coercivity of NdFeB magnet but also evidently reduce the production cost of the magnet.The new master alloy was prepared in the kA pilot-scale electrolytic cell by the independent technology.The rare earth master alloy can be used as the raw material for NdFeB.Compared