光源十字镜检测器具研究

对于充满泥浆的大口径钻孔轴线是否达到设计要求,需要对钻孔轴线的垂直度进行检验。然而常用的铅锤目测法与轴心系线法都无法准确检验钻孔轴线是否偏移。在统一采用桶体检验的基础上,对传统的方法进行改进。采用钢管隔离,人造空间,运用光走直线、垂直对焦的原理,制作了同步变形桶体、管内发光、镜显交点、以测量仪器为钻孔轴线中心点的“光源十字镜检测器具”。经实测检验,证明该检验器具满足设计要求,从而解决了对充满泥浆的大口径钻孔轴线是否偏移的检测问题。     

江苏国际图书中心深基坑支护施工技术

江苏国际图书中心基坑开挖面积及支护深度都较大，通过深基坑支护结构方案设计与施工，从基坑开挖到地下室施工到±0.00 m结束，基坑支护结构安全可靠。详细介绍了基坑支护方案、施工技术以及沉降位移监测和安全技术措施。     

旋喷桩加固地基过程中的地基沉降及其影响因素分析

旋喷桩在黄土地区已有建筑物地基加固应用比较广泛。本文通过两个工程实例,论述了旋喷桩加固地基过程中地基沉降规律及其影响因素,并提出了减小施工附加沉降的建议。     

工业旋转椭球体外形质量检测方法

介绍了基于电子全站仪和PC计算机及有关数据处理软件，进行工业旋转椭球体外形加工质量检测的原理和方法，讨论了检测应提供的检测内容和指标计算方法，特别提出了适应于作为外形检测指标的法向距概念，对检测结果进行了分析，实践证明，检测方法适用于缺乏纹理的较难用近景摄影测量方法处理的大型工艺工业部件质量检测。     

Laboratory simulation of clast abrasion

Experimental abrasion of river‐bed materials has been widely undertaken, producing ‘downstream’ fining rates that generally are believed to be much less than those observed in the field. A conclusion commonly adopted has been that sorting processes are more effective than abrasion processes. A comparative evaluation of results from an abrasion tank and a tumbling barrel are presented, which show that abrasion patterns and rates differ according to the equipment used, clast size and shape, the clast charge (barrel) and water velocity and bed material (tank). Abrasion is a composite process, and the effects achieved appear to be dominated by percussion in the tank and grinding in the barrel. Breakage, crushing and sandblasting are not modelled effectively, nor are effects achieved on clasts when they form part of the bed. Comparisons are made with other equipment used, the very limited amount of direct field abrasion monitoring, and with the probable suite of processes that may occur under field conditions. Also reviewed are the problems that arise when laboratory weight‐loss abrasion coefficients are used or converted into ones of size diminution, as usually derived from field observations of down‐channel trends. It is concluded that field abrasion rates generally have been underestimated, as the processes involved are at best only selectively represented by the experimental equipment so far used, and because the results obtained experimentally are capable of misinterpretation when related to field trends. Copyright © 2002 John Wiley & Sons, Ltd.     

三峡库区重庆巫山二郎庙滑坡勘察取心取样技术

重庆巫山二郎庙移民小区滑坡勘察为三峡库区移民项目，地层复杂，采用传统方法进行勘察达不到滑坡勘察的目的。采用金刚石单动双管钻具+SM胶泥浆技术，取得了较好的效果，钻探台月效率由150 m提高到350 m，岩心采取率达85%～90%，而且取出了泥夹块石、滑面、软弱夹层、破碎带样品。     

大口径旋挖钻具的研究及其应用

介绍了旋挖钻进所用的各种钻具结构特点及适用地层，包括螺旋钻具、旋挖钻斗、筒式环状钻头、扩底钻头。并介绍了这些钻具在青藏铁路等工程施工中应用所取得的良好效果。     

HZ308多功能取心钻具在某金矿区的应用效果

通过ＨＺ３０８多功能取心钻具有蚀变岩型和石英脉型金矿地层的应用，提出了防止底喷分流式钻头堵心、减少其损耗的措施。     

新型高效节能立轴岩心钻机的开发与应用

介绍了新型绳索取心钻杆及新型机械传动不停车倒杆立轴岩心钻机的特点及应用效果。分析了提高岩心钻探施工效率、降低成本、节能降耗的技术措施,同时提出了未来地质岩心钻机的发展方向及建议。