稀油密封干式煤气柜基柱安装精度的控制

稀油密封干式煤气柜在安装过程中,基柱的安装精度要求很高.文章通过对影响基柱安装精度的原因进行了分析,找出了一些保证基柱安装精度的方法.在高精度要求的安装工程中,测量是关键的手段,通过消除测量过程中产生的随机误差和系统误差的因素,从而满足测量定位精度的要求.并通过必要的刚性固定以保证构件的安装精度.     

300m^3高炉进风设备的安装工艺改进

高炉进风设备的安装，原鹅颈管采取现场逐个开孔安装找正，此工艺存在一定的弊病，现通过改进，围管、鹅颈管在场外预先进行安装找正，提高了施工质量、减少了工程主线施工时间。     

风机等高精度设备安装找正的研究与实践

风机等高精度设备安装找正的精度高,技术难度大。文章对风机等高精度设备安装找正进行了深入的研究与实践,摸索出安装找正的一种先进操作法,解决了该技术难题。     

直接还原铁厂回转窑传动系统的安装与找正

在回转窑传动系统安装找正过程中,大齿圈以及小齿轮的安装与找正最难,因为大齿圈约62T,安装精度极高,且与小齿轮啮合的要求精度也很高,因而本文将着重介绍大齿圈与小齿轮的安装与找正,对于主电机、主减速机以及辅助传动系统的安装与找正本文将不作介绍。     

带长中间轴弹性联轴器同心度调整方法

在传动设备安装或检修过程中,对于采用弹性联轴器连接的设备,其两轴同心度找正调整至关重要。若找正方法不对或调整不精确,会引起设备传动误差,导致设备振动超标,产生异常磨损,甚至造成部件损坏。以一台大型轴流通用风机安装为例,对其带长中间轴弹性联轴器的找正测量方法、找平找正偏差等影响因素,以四表法、三角放大法进行分析,并介绍带长中间轴弹性联轴器同心度找正调整方法,指导同类大型风机设备联轴器的安装找正。     

棒材可转换轧机的安装

介绍可转换轧机的合理的安装过程，减少安装找正过程中因返工增加的工作量，保证最终安装精度。     

机械设备找正安装的简易办法

安装找正机械设备的简易方法,机器纵向和横向水平找正后,采用百分表监测,拧紧地脚螺栓螺母,保证总体水平达到安装标准。     

锅炉四角布置直流喷燃器的找正方法

本文结合实际情况对四角布置直流以喷燃器安装时的找正方法探讨，并提出了一种简单实用的方法。     

机器设备安装检修中联轴找正实例解析

以实际设备安装、检修过程中出现的情况入手,对联轴器可能遇到的偏移情况、找正时的测量方法、找正实例分析、联轴器找正的对比等四个方面进行了阐述。     

薄板坯连轧机机架安装调整技术

连轧机为引进德国SMS公司设备，由六架轧机组成，本文以该设备机架安装调整为主线，阐述了采用精密水准仪，经纬仪，千分杆，内径千分尺，导电测量法配合找正调整的施工方法，保证达到德方给定的技术标准，同时对设备安装定位的具体措施及处理方法进行了探讨。     

钛设备在水相悬浮法氯化聚乙烯工业中的应用

介绍了氯化聚乙烯的性能和用途,当前水相悬浮法是应用最多的氯化聚乙烯生产方法,结合其工艺过程,水相悬浮法氯化聚乙烯工业选用钛设备的必要性和依据,钛设备在使用中应注意的问题。     

大型预埋螺栓安装技术在重型设备基础中的应用

结合韶钢120 t转炉本体设备基础预埋螺栓施工的工程实例,探索了一套大、重型设备基础中预埋螺栓安装精度的控制措施,以及通过基础施工缝的设置部位的研究、优化,达到降低施工场地的占用时间和最优成本控制的具体实现方法.     

涟钢2200m3高炉煤气洗涤水系统工艺与设备优化

简要介绍了高炉煤气洗涤水系统存在的问题,对这些问题进行了计算分析并对设备进行了改造,使系统得到了进一步的优化,理顺了系统的生产工艺与设备。     

机械设备安装工程施工技术要点浅析

从施工准备、放线就位、地脚螺栓、装配、管道安装、试运转等环节介绍了目前机械设备安装工程施工的现状以及对机械设备安装工程施工中的技术要点进行总结,以预防工程质量通病。     

Predicting Soil and Structure Vibrations from Impact Machines

A method for predicting the complete time-domain vibration records of soil and structures prior to installation of foundations for impact machines is described in detail. A paper provides support for the validity of accepted assumptions about the use of impacts directly on the soil for estimating the impulse response functions, and the effect of load zone dimensions on soil vibrations. The procedures for experimental testing on a site and computing the predicted complete vibration records are developed. Resulting patterns of computed and measured vibrations are shown for block-type foundation and a foundation under a vibroisolated block for impact machine. Furthermore, the method enables us to consider the heterogeneity and variety of soil and structure properties. In particular, it is useful under nonuniform and complicated soil conditions for determination and verification of safe distances from machine foundations to objects sensitive to vibrations.     

浅谈大型旋回破碎机安装及质量控制要点

大型旋回破碎机安装精度要求高,安装场地空间小,施工难度较大,特别在安装进口设备过程中很难找到通用的安装工艺及标准。笔者结合工程实践,重点阐述Superior MKⅡ旋回破碎机的安装难点和质量控制要点,供同类型设备安装参考。     

Influence of Overburden Pressure on Soil–Nail Pullout Resistance in a Compacted Fill

Soil nailing has been widely used in many places in the world in the last two decades because of its technical and economical advantages. The nail–soil interface shear strength is an important parameter in soil nail design. This parameter is governed by a number of factors, among which the influence of the overburden pressure (or soil depth) is the most controversial. There are differing views concerning the effect of overburden on the nail–soil interface shear strength. In order to examine the influence of the overburden pressure, a series of laboratory pullout tests on soil nails installed in compacted completely decomposed granite fill have been conducted using two pullout boxes. Numerical simulations have also been carried out and the results are compared with the pullout test data. The procedures of the pullout tests and new features of the pullout boxes used are briefly described. Changes of the vertical stress in soil close to the nail throughout the course of soil nail installation and pullout are presented and discussed in detail. It is observed from the results of this study that the installation process of soil nail induced significant vertical stress changes in soil around the soil nails, and that the soil nail pullout shear resistance is independent of the overburden pressure (or soil depth).     

Behavior of Field Splice Details in Precast Concrete-Filled Steel Grid Bridge Deck

Redecking operations executed on urban bridges that experience large traffic volumes frequently require carefully orchestrated construction sequences carried out during times of nonpeak traffic. In such a construction environment, only bridge deck options that exhibit a high degree of modularity in conjunction with ease of installation are considered as viable options for a given redecking operation. As a further requirement, the deck installation must also be expected to perform essentially trouble free, with minimal maintenance, for very long periods of time in extremely harsh environments. The present research investigates the behavior of two new deck splice details for use in bridge applications involving precast concrete-filled steel grid deck panels. The research is primarily experimental in nature and is carried out using full-scale deck panel specimens. However, in an effort to better understand the experimental results, 3D finite-element models of the deck specimens are also constructed and studied. This paper summarizes the results from this experimental and analytical program of study.     

不锈钢冷轧基础螺栓安装技术

酒钢不锈钢冷轧二期大冷线基础分9块,全长270 m,底部标高最深为7.6 m。基础螺栓标高大致分三层近千根,由于设备安装精度要求高,螺栓相对尺寸及总尺寸的安装精度同样要求十分严格。为了保证螺栓的安装精度,从测量控制、螺栓固定架安装、螺栓安装、混凝土浇筑等几个方面进行了严格的控制。特别是定位控制,采用长短线相结合的方法,利用全站仪进行有效的控制,满足了规范的相关规定。     

电气安装工程的质量通病及防治

列举电气安装工程中存在的一些质量通病,通过分析其原因,提出了针对性的预防及整改措施,帮助电气施工人员及时纠正错误。