土层锚杆在地下式水池抗浮中的应用

介绍了土层锚杆在地下式水池抗浮中的应用,说明土层锚杆在抗浮结构中的应用是可行和可靠的。     

岩层和土层抗浮锚杆基本试验研究

通过现场抗浮锚杆基本试验,对岩层和土层抗浮锚杆的承载性能和位移性状进行了研究。结果表明,在常压注浆条件下,岩层抗浮锚杆的极限承载力大大高于土层抗浮锚杆;通过二次高压注浆,可以显著提高土层抗浮锚杆的极限承载力,就本工程来说,承载力的提高幅度在1倍以上。达到最大试验荷载时,土层抗浮锚杆位移要高于岩层抗浮锚杆。     

抗浮锚杆在粘性土层中应用技术探讨

抗浮锚杆作为一种有效的抗浮技术手段,能解决大型建筑地下室工程的抗浮问题,但是目前抗浮锚杆的设计与施工还没有明确的规范可循。结合具体工程实例,探讨了抗浮锚杆在粘性土层中的设计与施工应用技术。同时,通过对现场抗浮试验锚杆试验研究,对抗浮锚杆在粘性土层中是否能正常工作的评判标准给出了建议,对于类似工程应用具有一定的参考价值。     

土层锚杆在构筑物抗浮设计中的工程实践

本文主要介绍土层锚杆作为水池抗浮措施的工程实践,并通过试验结果分析,说明土层锚杆在水池抗浮设计中的应用是可行的,对其它类似工程的抗浮设计具有一定的参考作用。     

土层锚杆在结构抗浮中的应用

结合工程实例 ,介绍了土层锚杆在结构抗浮中的应用     

高压旋喷桩锚杆在结构抗浮技术的应用前景

沿海地区及污水处理改造工程中,地基土为软土或淤泥质土情况较为常见,为保证建筑或构筑物的结构安全,解决软土地基的结构抗浮问题显得尤为重要。最常用的灌浆抗浮锚杆当在土层情况良好的土体中实施时,其锚杆体可与土体有效锚固,抗浮效果明显,但当土层为软黏性土、淤泥质土等软土地基时,因锚杆体无法与土体有效锚固,无法充分发挥其锚固力,抗浮效果较差,往往无法达到设计抗浮的要求。论文介绍一种高压旋喷桩抗浮锚杆施工技术,该锚杆体系相对于普通的灌浆锚杆抗拔力有大幅度的提高,很好地解决了淤泥质土的结构抗浮问题,并在施工工期、工艺特点、经济效益及环境效益方面有着独特的优势,具有良好的推广应用前景。     

浅谈土层抗浮锚杆的应用

土层抗浮锚杆的设计总结与施工经验。结合保定市某地下车库工程抗浮锚杆设计与施工的实例,对土层抗浮锚杆的设计及施工进行研究探讨。     

土层抗浮锚杆抗拔力试验和检测问题的探讨

现行的各种锚杆规范、规程对土层抗浮锚杆试验方法的规定较为笼统,不够明确,以致在选用土层抗浮锚杆的试验方法时,不能直接套用单一规范的方法,而只能在考虑各种因素的情况下,参考多本规范。为此,通过对各个锚杆规范标准中的锚杆检测方法的分析比较,试图确定出一种比较符合实际的试验方法。     

土层锚杆在某抗浮工程中的应用

通过实例，阐述了土层抗浮锚杆的设计、施工与试验过程，分析了抗浮锚杆设计施工中需要注意的问题。     

抗浮锚杆现场试验及数值模拟分析研究

随着城市建设的发展,地下空间应用越来越广,地下建(构)筑物的抗浮问题变得越发明显,特别是地下水位较高的区域,抗浮稳定性对结构安全产生的影响日益突出。对抗浮锚杆的作用机理及破坏形式进行阐述,通过现场试验及借助ABAQUS建立三维有限元模型分析探讨了抗浮锚杆受力变形特性,进一步揭示了抗浮锚杆的工作机理,得到一些有用的结论,对今后抗浮锚杆的设计和施工具有一定的指导意义。     

Book Reviews

Book Reviewed in this article:
Affordable Water Supply and Sanitation. Proceedings of the 20th WEDC Conference, Colombo, Sri Lanka, 22–26 August 1994. Edited by J. Pickford, P. Barker, A. Coad, T. Dijkstra, B. Elson, M. Ince and R. Shaw.
Contaminated Land , by Stephen Tromans and Robert Turrall-Clarke.
E.C. Treaty and Environmental Law , by L. Kramer.
Mixing and Transport in the Environment. (Eds. Keith Bevan, Philip Chatwin and John Millbank.)
Stream Ecology, Structure and Function of Running Waters , by J. David Allan.
Operation and Maintenance of Urban Water Supply and Sanitation Systems: A Guide For Managers. Written for, and published by, the World Health Organisation.
Integrated Solid Waste Management: A Lifecycle Inventory , by Peter White, Dr-Ing Marina Franke and Peter Hindle.
Report 142: Control of Pollution from Highway Drainage Discharges. By Martin Luker and Keith Montague with contributions from 11 other individuals.
Tables for the Hydraulic Design of Pipes, Sewers and Channels. H. R. Wallingford and D. I. H. Barr.
The Ecological Basis for River Management. (Edited by D. Harper and A. Ferguson.)
Waste Incineration and the Environment. Issues in Environmental Science and Technology 2. (Eds. R. E. Hester and R. M. Harrison.)     

珊瑚礁礁灰岩工程特性测试研究

珊瑚礁是一种特殊的岩土类型。运用现场钻探、标准贯入试验、波速测试、平板载荷试验等勘探手段和方法,对沙特红海珊瑚礁礁灰岩进行了含水率、重度、抗压强度等室内试验,分析研究了珊瑚礁礁灰岩的物理力学性质及相关关系。测试研究表明:岩芯采取率、岩石质量指标和标准贯入试验可以评价珊瑚礁礁灰岩沿深度的岩土性能变化特征;珊瑚礁礁灰岩具有结构多变、多孔、重度小、性脆、强度低且变化大等工程特性;珊瑚礁弹性波传播速度小,而珊瑚碎屑岩和珊瑚状石灰岩具有较高的弹性波波速;载荷试验p-s曲线与其他岩土不同,随着荷载的增大,礁灰岩空隙发生了脆性破坏,岩土被压密。测试成果可供礁灰岩的进一步研究和工程应用参考。     

Book Reviews

Business, Pollution and Regulation, by S. Simpson and J. Carless.
Chlorinated Organic Micropollutants. Edited by R. E. Hester and R. M. Harrison.
Contaminated Land and its Reclamation. Edited by R. E. Hester and R. M. Harrison
Dam Hydraulics, by D. L. Vischer and W. H. Hager.
Environmental Health Criteria No. 177: 1, 2-Dibromoethane
Life Cycle Design: A Manual for Small and Medium-Sized Enterprises
Marine Debris: Sources, Impacts and Solutions. Edited by J. M. Coe and D. B. Rogers.
Resource and Environmental Management, by B. Mitchell.     

Book Reviews

Book Reviewed in this article:
Pollution in the UK, by Denise Franklin, Professor Neil Hawke and Mark Lowe. Published by Sweet and Maxwell
Low-Cost Sanitation, by John Pickford.
Waste Treatment and Disposal. Issues in Environmental Science and Technology. 3. (Eds. R. E. Hester and R. M. Harrison.)
Drilling for Water - A Practical Manual, by Raymond Rowles.
The Environmental Guide to Pollution Control Technology. Published by Caldicott Morgan
Environmental Impact Assessment for Waste Treatment and Disposal Facilities, by Judith Petts and Gev Eduljee.
Environmental Health Law, by Prof. Neil Hawke.
Risk and Opportunities - Managing Environmental Conflict and Change, by Valerie Brown, D. Ingle Smith, Rob Wiseman and John Handmer.     

Book reviews

Promoting local growth: process, practice, and policy. Daniel Felsenstein and Michael Taylor (eds.)
Governance, institutional change and regional development. M. Danson, H. Halkier, and G. Cameron (eds.)
Institutions and systems in the geography of innovation. (Economics of Science, Technology and Innovation). M.P. Feldman and N. Massard (eds)
Job Access, Workplace Mobility, and Occupational Achievement. Maarten van Ham     

基于问卷调查的人文地理与城乡规划人才培养改革研究

人文地理与城乡规划专业综合人文地理和城乡规划的学科背景和专业知识,其专业内涵和外延的界定、课程体系的构建等问题一直存在。西部地区地方院校基于地理学背景开设的人文地理与城乡规划专业,往往面临专业定位、课程设置、学生能力培养等方面的思考。从学生自身层面反馈问题与建议,能更好修正自上而下教学改革的局限性。文章以南宁师范大学人文地理与城乡规划专业为例,结合本科生调查问卷分析,对课程设置、课时安排、课程内容、培养方法等方面进行调整。     

南水北调中线膨胀土/岩微观特征及其性质研究

对南水北调中线工程典型的强、中膨胀土/岩开展室内土工试验与X射线衍射试验,研究了其矿物成分及与胀缩性指标的关系,利用扫描电镜SEM图像进行了微观结构的定性分析,并基于MATLAB软件对孔隙和微结构单元体的微观特征进行了定量化研究,探讨了不同类型膨胀土/岩的颗粒形态、结构类型、裂隙分布等微观特征及其与工程特性的关系。结果表明：膨胀土/岩中的蒙脱石等黏土矿物含量高,强膨胀土/岩以絮凝结构,扁平状聚集体与卷曲片状颗粒为主,中膨胀土/岩以紊流状、粒状堆叠结构为主,片状聚集体与单粒体并存,前者微裂隙发育且定向性明显,孔隙比大,孔隙分形维数与颗粒尺寸小于后者。膨胀土/岩微结构单元圆形度低,复杂度高。膨胀岩定向排列特征显著,颗粒分形维数小,颗粒分形维数与膨胀潜势和孔隙比的变化规律一致。微观组分和结构特征与物性指标分别呈线性关系与负指数幂关系。     

Foundation connections for circular concrete-filled tubes

Concrete filled steel tubes (CFTs) promote economical and rapid construction. They offer increased strength and stiffness relative to structural steel and reinforced concrete. The steel tube serves as formwork and reinforcement to the concrete fill, thereby reducing the labor requirements. CFT components encourage the optimal behavior of each material (concrete and steel) while providing a symbiotic relationship between the two to mitigate undesirable failure modes. The fill increases the compressive strength and stiffness, delays and restrains local buckling of the tube, and enhances ductility and resistance if composite action is achieved.Both rectangular and circular CFT have been employed, but circular CFT provide better performance, because they provide increased confinement of the concrete and composite action. A missing component for circular CFT construction is reliable and ductile connections. The research described herein that investigated and develops design procedures for simple and economical connections of circular CFT piers or columns to reinforced concrete foundations, pile caps and wide cap beams (bridge construction) is presented and evaluated. The connection requires no dowels or internal reinforcement connecting the tube to the footing or cap beam. Experiments and analytical studies evaluate the inelastic seismic performance and establish design criteria for the connection. The seismic performance of a CFT column and connection assembly is compared to a conventional reinforced concrete column. The research shows that the proposed connection develops the full capacity of the composite column. The assembly provides excellent ductility and inelastic deformation capacity under seismic loading while mitigating damage even at larger drift demands.     

国内外住区空间环境对居民健康影响研究综述

住区作为城市基本单元,良好的规划建设在改善人居环境和引导居民的健康生活习惯上具有基石作用,为深入解析住区外部空间环境对居民的健康影响,促进公众健康,追踪梳理了国内外相关主题文献,辨析了住区空间对居民健康影响的要素系统和影响路径,归纳了用地与设施、空间形态、交通与街道、绿色空间四类空间要素对居民健康的影响,发现相关健康影响并非仅是简单的正负线性相关,还存在显著的地域差异、多因素影响特征和阈值非线性相关性,进而探讨了相关研究的结论与方法在住区规划建设过程中的运用。     

Interaction of Programming and Design: The First Unitarian Congregation of Rochester and Louis I. Kahn

This essay investigates the relationship between programming and design. It exposes and criticizes those views that characterize programming and design as separate and their relationship as linear. Instead, we propose that the relationship is interactive and that the clarification of programmatic and design issues goes hand in hand. During this interactive process both client and architect take significant responsibilities. The design process of the First Unitarian Church of Louis Kahn is an illustrative example. Investigation of the client's reports, of Kahn's and the client's letters, and of Kahn's design proposals exposes the client's contribution and the interaction between programming and design. Our study suggests that clients have the potential to play crucial roles in design and deserve credit.