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1.
在目前还没有进行隧道OPS测量的规范细则情况下,本文介绍了应用GPS技术进行隧道控制测量时调度命令的编制、观测方法和数据处理方法,通过计算比较,提出了隧道GPS控制网的布网建议,为今后进行GPS测量提供可借鉴的经验。  相似文献   

2.
GPS水准及其在隧道高程控制中的应用   总被引:1,自引:0,他引:1  
GPS水准的精度主要取决于GPS大地高差转换为正常高高差所需要的高程异常差的确定精度。本文提出确定测点间高程异常差的高程异常变化梯度法和垂线偏差法,介绍方法在隧道高程控制测量中的应用及其效果,讨论其实现技术。  相似文献   

3.
提高GPS基线解算质量的某些技术   总被引:3,自引:0,他引:3  
本文对GPS基线自动解算成果不理想的情况,提出了一些进行人工干预的手段和方法,并结合实例做了分析。应用这些技术,将有利于提高GPS基线解算成果的精度和质量。  相似文献   

4.
3S技术在风景区规划中的应用研究   总被引:19,自引:2,他引:17  
简要介绍GISRS和GPS技术在风景区总体规划和研究中的应用。首次利用栅格制图方法实现规划图件的计算机编制  相似文献   

5.
全球卫星定位系统技术及其应用齐文秀(有色总公司矿产地质研究所北京100012)①全球卫星定位系统(GlobalPositioningSystem)简称GPS,是美国国防部建立的卫星定位和导航系统。早期的GPS定位精度为几米,现在的精度已达到几厘米。G...  相似文献   

6.
大比例尺地形测量新技术的发展及其前景   总被引:4,自引:0,他引:4  
随着以遥感(RS)、全球定位系统(GPS)和地理信息系统(GIS)为代表的现代测绘技术体系的建立,大比例尺地形测量从技术手段和产品形式及其应用上均发生了巨大的变化。本文着重介绍全站仪数字测图、摄影测量与遥感、基于GPS的地形测图等新技术的发展现状及其前景。  相似文献   

7.
中国全球定位系统技术应用协会成立中国全球定位系统技术应用协会(ChinaTechnicalApplicationAssociationforGlobalPost-tioningSystem)简称“CTAAGPS”,于1995年9月25日在北京成立。出...  相似文献   

8.
肖建华  李宗华 《城市勘测》1999,(2):21-22,38
本文介绍了采用GPS技术建立武汉市江汉三桥施工控制网的过程与方法,并采用测边网进行了对照检核,分析总结了高精度GPS控制网施测中所应注意的若干问题。  相似文献   

9.
工程测量发展趋势及相关设备应用的探讨   总被引:2,自引:0,他引:2  
阐述了工程测量将逐步向GPS平面控制网和GPS高程测量、数字化测图及自动精密工程测量等高科技方向发展,分析了高精度、自动化、智能化的工程测量仪器的发展和应用。  相似文献   

10.
目前国内使用的GPS数据预处理软件基本上为进口的随机软件,本文介绍了由武汉测绘科技大学地测院研制的利普GPS静态基线解算软件的特点和功能以及武汉市勘测设计研究院采用该软件的生产、应用、情况、总结了解算过程中的一些经验与体会,与大家探讨,希望为建立,我国自己优秀的GPS数据预处理软件作出贡献。  相似文献   

11.
The main roof of the ”Haus der Kulturen der Welt“ in Berlin Which is very well‐known on account of its history and striking structural design – was to be inspected by the author to determine its condition and analysed with regard to the durability of the existing liquid synthetic sealant. The roof structure consists of a biaxial, curved area‐covering structural element with circumferential edge beams of pre‐stressed lightweight concrete. This is the result of the reconstruction between 1984 and 1987 following a partial collapse of the then Berlin Congress Hall in 1980. The very thin roof shell is also made of lightweight concrete and, like the edge beams, has a polyurethane‐based spray‐on seal that was specially developed for this purpose as protection against the ingress of moisture. The reason why this, at the time, novel type of seal was chosen was that it should take into account the fact that the roof design urgently needed some kind of protection against moisture that had to compensate the expected changes shape and crack movements of the roof with no damage. The following article reports on the nature, scope and main results of the analysis of the condition of the roof seal, edge beams and abutments. It will also describe the repair recommendations resulting from the investigations, which form the basis of the execution of work at the present point in time. Apart from presenting the technical principles and special features of the building that have to be taken into account during any repairs, the special features of the execution will also be addressed.  相似文献   

12.
Magnetoelastic Measurement of Prestressing Force in Civil Structures The knowledge of the tensile force of prestressing steel elements and its reliable and non‐destructive determination are of essential importance for the assessment of the structural health condition of prestressed concrete structures and tie‐back systems in terms of structural safety, serviceability and durability. For the evaluation of the prestressing force in steel tension members, the measurement technique presented in this contribution is using the magneto‐elastic effect (ME‐effect) of ferromagnetic materials. This effect describes the reverse‐proportional correlation between the mechanical stress and the magnetic properties of ferromagnetic materials. The cylindrical coiled sensors pushed over the tendon and the measuring device developed and practically optimized at the iBMB/MPA of the TU Braunschweig enable a fast and reliable measurement of the prestressing steel force after an initial calibration. In this contribution first the state of the art of prestress measurement techniques for steel tension members is presented. Afterwards, the ME‐measuring method with the basics and merits of magneto‐elastic prestressing force identification is shown. Further recent research results as well as several building applications will be discussed.  相似文献   

13.
指出从组织论角度看项目具有临时性组织的性质,对项目的定义进行了思考,从生产功能、代理机构、代理不确定性事务及项目管理者角度论述了作为临时性组织的项目,以促进对项目的理解和研究。  相似文献   

14.
王振贵 《山西建筑》2009,35(18):211-212
从母岩的选料、级配控制、石粉和泥土含量控制三个方面阐述了控制机制砂质量的重要性,并提出了可将隧道混凝土机制砂的石粉含量限值放宽到10%的建议,以促进耐久性混凝土的研究。  相似文献   

15.
浅谈室内色彩设计的方法   总被引:1,自引:1,他引:0  
提出了室内设计中色彩设计的原则,从色彩在室内设计中的作用、功能及使用者的心理等方面进行了探讨,以提高人们对色彩的认识,充分发挥色彩设计的作用,更好地满足消费者的需求.  相似文献   

16.
洪斌 《建筑师》2005,(5):24-31
本文从上海城市文化特点的角度出发,以“生活世界”哲学为基础,对现阶段居住小区设计模式进行了分析。认为“现实生活世界”是上海当代居住小区设计的起点和归宿。也只有这样,才能使新时代的空间形态与生活形态再次整合,创造出新时代的美好人居。  相似文献   

17.
郑光复 《新建筑》2010,(1):139-140
针对央视新厦之设计弊端及库氏之流所称邪淫形象,提出改扩建设想及相应建议。从造形立意、结构体系、消防安全等分述改善措施,且将变更业主、转换功能及融资渠道等亦考虑其中。反对以重金建造全球史无前例之奥运纪念碑,申明现有奥运场馆即为最佳纪念实物。主张起诉库氏、矶氏,消除恶劣影响,结合改扩建,进而达致“化辱为荣,补损成益”。  相似文献   

18.
Loading of the tunnel sealing system due to fresh concrete pressure This report deals with the loading of the geomembrane during the construction phase of the inner shell of a tunnel. In a systematic parameter analysis at the institute for underground construction at FH Münster the geomembrane and the geotextile were tested under different realistic conditions. Laboratory testing showed a dependence on the seal support surface of the shotcrete and on the characteristics of the geotextile. The deformations of the membranes due to fresh concrete pressure are significantly smaller than the permitted values in the technical regulations. The main results of the investigations are described below.  相似文献   

19.
The new bridge over the river Lahn near Limburg as part of BAB 3, Germany – Competition and Design The effort of the responsible engineers and architects at the Lahntalbrücke Limburg always becomes clear when a new well‐designed bridge structure is needed for the representative Lahn valley. To handle the steadily increasing traffic prestressed concrete structures have gained acceptance for both replacement constructions. Both constructions also convince optically through their simplicity while leaving the creative presence of the cathedral in the valley unchanged.  相似文献   

20.
The paper considers methods of procurement for the construction of water- and sewage-treatment works other than the traditional use of the ICE 5th Edition Conditions of Contract and Bills of Quantities. This is as a consequence of the speed at which schemes are currently required within the water industry.
The paper particularly focuses on the use of target contracts, using the Institution of Chemical Engineers'Green Book form, and considers various types of target. It also discusses the form which tender documents may take, and how targets may be calculated.
Tendering procedures, including the use of two-stage tenders and negotiated targets, are considered, as are the procedures for cost monitoring and the financial management of the contract. Finally, the role of the engineer and quantity surveyor is considered.  相似文献   

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