大伙房水库输水工程的工程坐标计算与使用

结合具体工程实例,介绍了输水工程计算工程坐标的目的、依据,研究了工程坐标系参数的选取,计算工程坐标的注意事项,工程坐标的使用范围,为类似工程计算工程坐标积累了经验。     

浅析建筑工程后期工程施工技术

抹灰工程、楼面工程、涂料工程、门窗安装工程、吊顶工程及外墙装饰工程等,是建筑工程的后期工程,对建筑工程的审美起着重要的作用。本文就以几个方面进行相关探讨,以期对以后同类工程能够起到借鉴作用。     

关于征集“技术议题”的公告

今年是《工程勘察》杂志创刊35周年。35年来,《工程勘察》杂志秉承理论联系实际,面向工程实践的办刊宗旨,面向工程勘察实践,面向岩土工程、工程地质、工程物探、地下水资源与环境、测绘工程等专业     

工程资料在工程管理中的重要作用

工程资料是工程档案构成的要件。能够更好地反映整个工程实际建设情况、备案查找、技术管理措施、关键部位建设措施应用情况,对于未来工程建设的合理性具有十分重要的指导意义。工程资料又称之为工程内业,是工程管理非常重要的工作流程之一。通过工程资料在工程管理中的重要作用分析,了解工程资料对于工程品质控制的重要意义,当前工程资料在管理期间存在的不足,制定工程资料规范化管理的有效策略,使整个工程资料的管理工作得以更加具体的展开。     

河海大学土木与交通学院

正河海大学土木与交通学院可追溯到1922年河海工程专门学校设立的"结构部"和"路工学部"。1924年,东南大学工科与河海工程专门学校合并成立河海工科大学,我国著名土木桥梁专家茅以升先生任校长,为本学院的学科发展打下了坚实的基础。学院拥有岩土工程国家重点学科,土木工程学科为国家一级重点学科培育点,江苏省一级重点学科及江苏省优势学科建设工程学科,结构工程学科为江苏省重点学科;设有一个土木工程博士后流动站,拥有土木工程一级博士学位授予权,岩土工程、结构工程、防灾减灾工程及防护工程、桥梁与隧道工程等四个二级学科,拥有博士及硕士学位授予权,交通运输工程一级学科拥有硕士学位授予权。学院目前设有土木工程和交通工程2个系,岩土工程、结构工程、安全与防灾工程、桥梁工程、隧道与地下工程、道路与铁道工程、交通运输工程、建筑与景观等8个研究所和土木与交通实验中心。拥有岩土力学与堤坝工程国家重点实验室、国家外专局堤坝工程安全与防灾学科创新引智基地、江苏省岩土工程     

工程风险管理与工程保险

工程风险管理与工程保险都以建筑工程为研究对象,以分析建筑工程中潜伏的风险为基础,做出工程风险的处置安排。工程风险与工程保险是紧密相连、互为因果关系的,工程保险发展的内在原因和需求是工程风险,而工程风险的有效分散的途径之一是工程保险。     

城市商业综合体项目安装工程造价控制探析

对于一个城市商业综合体来说,虽然机电安装工程的造价占工程总造价的比例不高,但其安装工程专业多,包括有空调通风工程、消防工程、动力照明工程、给排水工程、弱电工程、燃气工程、有线电视工程、电梯安装工程等,作业空间在室内,作业场地狭小,施工周期短,多种交叉作业,工艺不复杂但繁多,因此,如何做好安装工程的造价管理和成本控制是商业综合体项目造价控制的关键因素之一。     

工程方法的理论视域与现实旨归

创新是引领发展的第一动力,工程是实现创新的重要载体。工程哲学是哲学学科综合创新的学科生长点,工程方法论是工程哲学的一个重要研究方向。工程方法作为一个核心的范畴,有必要从工程本体论、工程方法论、工程知识论和工程价值论四个维度对工程方法的本质、特征与意义进行全面分析,这种分析有助于对工程方法的理论视域与现实旨归获得更为清晰地认识,因而具有重要的理论价值与现实意义。     

工程地质勘察在工民建工程中的应用研究

工民建工程中加强工程地质勘察工作是十分重要的。因此,在工程进行以前需要先掌握本地区地质情况,拟定出合适的解决方案。本文通过工民建工程中工程地质勘察的特征及其应用的重要作用,分析了工程地质勘察现实情况,阐述了工程地质勘察实践应用中的不足,并提出了工程地质勘察应用与工民建工程中的举措,以供参考。     

浅谈黄河河道整治工程管理

工程管理是维护工程安全运行发挥效益的基础工作,黄河河道整治工程的管理工作主要是保持工程完整性和工程的整洁美观,同时还要做好工程观测,保证工程安全运行。     

Zustandsuntersuchung und Instandsetzung am Hauptdach des Hauses der Kulturen der Welt in Berlin

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.     

Magnetoelastische Spannkraftmessung in Bauwerken

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.     

谈贯标中企业如何做好检验和试验工作

根据在贯彻GB／T 19001－ISO9000族标准过程中的实际工作经验,从贯彻中为什么要抓好检验和试验工作入手,对检验和试验依据的管理,检验和试验设计的控制,检验和试验人员的培训,检验和试验记录的填写,保存和分析四个方面进行了论述,阐述了检验和试验工作在贯标中的重要性。     

Alternative Methods of Procurement for Works of Water and Environmental Management

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.     

Colour and turbidity removal with reusable magnetite particles—VII: A colloid chemistry study of the effect of inorganic ions on the efficiency of clarification

The removal of colour and turbidity from natural waters by the addition of magnetite is an interfacial process. Furthermore the components of this system are either of colloidal dimensions or of a surface active nature and thus this method of water clarification is very much in the realm of surface and colloid chemistry. Electrokinetic techniques have been used to examine the influence of a number of inorganic species, commonly encountered in the practical situation, on the surface properties of magnetite and consequently on the efficiency of the process.     

Erfahrungen bei der Beurteilung der Dauerhaftigkeit vorgespannter Bewehrung von älteren Spannbetonbrücken

Experiences due to the evaluation of the durability of prestressed reinforcements in old prestressed concrete bridges. Old prestressed concrete bridge superstructures exhibiting cracks across the prestressed reinforcement need detailed inspections for estimating maintenance requirements. Only this type of evaluation makes it possible to determine the required extent and nature of maintenance. In this paper essential steps of the “Directive of the durability of prestressed reinforcements in old prestressed concrete bridge superstructures” of the Federal Highway Research Institute are explained, also against the effects of growing heavy traffic with expected higher gross weights and axle loads.     

斜坡失稳的突变模型与混沌机制

针对斜坡平在滑动失稳问题,运用突变理论方法,给出了快速滑坡和慢还滑坡发生的判据,提出了刚度效应失稳新理论,指出刚体极限平衡稳定性评价方法有较大缺陷;根据建立的斜坡演非线性动力学模型,发现外部环境因素的作用一斜坡系统的响应有复杂的非线性关系,当斜坡本身的非线性作用与外部环境因素的作用能力相当时,斜坡化过程会出现混沌现象,其通向混沌之路是通过倍周期分叉实现的。     

约束受热伸长中空柱填充混凝土的耐火性能

在圆形中空柱中填充混凝土是一种很好的柱子加固方案,因为它能够增加柱子在室内和高温环境下的承载能力。然而,发生火灾时,对受热伸长的约束可能会改变其力学性能。通过对约束受热伸长中空柱进行一系列耐火试验后,得出试验结果。试验对柱子长细比﹑承载等级﹑周围结构刚度以及所占钢筋的百分比和混凝土强度等参数进行了测定。结果显示,这些柱子的极限抗火时间都小于46min。在柱子内层墙面使用混凝土环,从其性能上来讲在火灾时并没有太大优势,因为混凝土环会受到钢管过热而带来的大面积碎裂。柱子最主要的破坏方式即是整体屈曲。然而,在一些试验样本上也出现了局部屈曲。     

Ecological succession in mountain lake ecosystems of Southern Siberia after the introduction of the peled – Coregonus peled (Gmeli, 1778)

Abstract

This article summarizes a long-standing study of the process of introduction of the peled to the Southern Siberian mountain lake ecosystems. The peled has adapted to changes in food supply. Pressure of the euryphagous peled caused the substitution of larger forms of zooplankton by smaller ones. Similar changes occurred in the content of phytoplankton. Succession of zoobenthos in the littoral part of the lakes manifested itself as the decrease in the total biomass, in its part of zoobenthos (Gammarus) and as the increase in the biomass of other groups. The opposite changes were encountered in the profundal zone of zoobenthos (the decrease in the total biomass owing to the existence of larger forms of alpha-polysaprobes). The restructuring observed in various communities signifies the substantial changes in the whole process of generation and transformation of organic substance in the mountain ecosystems with the dominance of the introduced peled.