SMW工法深基坑支护设计浅探

在众多深基坑围护方法中,SMW工法以其适用性强、围护成本低、施工周期短而倍受关注。结合SMW工法设计、施工的一个实例,对上海软土地基SMW工法深基坑支护设计的技术进行一些粗浅的探讨。     

深基坑支护中的SMW工法

SMW工法是近年来兴起的一种新的深基坑围护形式,由于其具有无渗漏水、造价低等诸多优点,已得到越来越广泛的应用。文章结合工程实例,介绍SMW工法施工工艺及其操作要点,供同类型施工参考。     

大直径SMW工法设计与施工关键技术分析

深基坑支护设计,不仅要保证基坑内的正常作业,而且要防止基坑及坑外土体的移动,确保基坑附近建筑物、道路、管线等的正常使用.因此,深基坑围护结构的安全性显得尤为重要.在众多围护方法中,SMW工法(型钢水泥土搅拌墙)以其适用性强、围护成本低、施工周期短而倍受关注.文章结合工程实践,对大直径SMW工法在软土地基深基坑支护中的支护结构设计及施工要点及难点进行了分析和探讨.     

SMW工法在浦东南路——张杨路下立交深基坑工程中的应用

结合上海某下立交的基坑工程设计与施工，分析SMW工法围护的基坑开挖引起的变形以及对周围环境的影响，为SMW工法这一集挡土、止水两大功能于一体的新型围护结构在上海软土地区的推广应用积累经验。     

深基坑围护结构中SMW工法桩施工工艺研究

为了提高深基坑围护结构施工质量,以广东省珠三角城际轨道交通琶洲支线工程为例,分析深基坑围护结构中SMW工法桩的特征,提出应用SMW工法桩施工工艺的施工方法,以期为同类型施工提供参考。     

SMW工法在城市快速通道建设中的应用

结合南京某工程,介绍了SMW工法在施工中应引起注意的几个问题,阐述该工法造价低、工期短、材料循环利用、环境影响小等方面的特点,提出结合工程实际,适当加大SMW工法桩桩长的观点。     

SMW工法在上海国际会议中心地下车库围护设计中的应用

结合上海国际会议中心地下车库的设计,介绍基坑围护采用SMW工法的设计特点,阐述在不同环境条件下设计所采用的计算方法以及对地铁区间隧道的保护措施。     

SMW工法在基坑围护结构中的应用

SMW工法是在水泥搅拌桩内插入H型钢或其它种类的受拉材料,形成受力和防水的复合结构.该结构具有止水性能好,施工工期短,施工简单、方便,工程投资省等优点.通过工程事例重点介绍如何进行SMW工法设计,提出施工注意事项.     

杭州西湖隧道工程结构设计

杭州西湖隧道工程采用水泥土搅拌桩内插H型钢作为围护结构(即SMW工法),该工法是首次在杭州市应用,为该工法的进一步推广提供了更有力的设计依据和宝贵的施工经验。     

SMW工法在地铁静安寺站5号出入口下沉式广场基坑围护工程中的应用

在地铁静安寺站５号出入口下沉式广场基坑围护工程中,采用了ＳＭＷ工法。基坑开挖过程中严格遵循时空效应原则,做到分段、分层对称开挖,随挖随撑,使该种工法经受了盆式开挖掘施工方法的考验,围护效果良好。新颖的ＳＭＷ工法,正以其优越的社会,经济效益而逐渐走向大型的深基坑工程施工领域。     

Analysis of factors affecting the choice of route of pedestrians

Pedestrians as compared to vehicular traffic enjoy a high degree freedom of movement even in heavily congested areas. Consequently, there are more alternative links available to pedestrians between a given origin‐destination (O‐D) pair. This paper describes a study done by the University of Calgary to evaluate the factors affecting the choice of route on intra‐CBD trips or trips within the Central Business District (CBD).

An origin destination survey conducted in downtown Calgary, Alberta enabled the identification of the most significant factors influencing the choice. These factors were analyzed in relation to the physical characteristics of the location, personal characteristics of the trip maker and the type of the trip.

It appears that most people chose the shortest link and factors such as the level of congestion, safety or visual attractions were only secondary. This suggests that the length should be made a major consideration when planning and designing pedestrian links.     

输油管道中原油乳状液的流变性研究

原油乳状液的流变性是原油开采后在管道中输送的重要研究方面,为了更好地研究这一性质,采用电动搅拌机、偏光显微镜以及流变仪等仪器来测定不同含水率的原油乳状液在不同条件下的黏度,观测不同含水率的原油乳状液在偏光显微镜下的形态。并且分别对原油乳状液的黏度与含水率之间的关系以及与剪切速率之间的关系进行研究,初步确定了所测区块原油乳状液的转相点以及该区块原油乳状液的流变特性,为生产中的油气集输提供了理论依据。     

Preliminary results of an analysis of areas of influence in Shanghai

The main deficiency of most current modeling approaches to transportation can be identified as neglect of the integration of existing geographical knowledge in regard to the ex ante transport/land use modeling approaches, with its focus on territorial dynamics and theory development. This paper addresses this aspect of the problem by introducing a theoretical and methodological framework for the analysis of the interrelationship between land uses. The analysis attempts to determine to what extent the functional land use in a city can be considered an ordered pattern. The order sought does not rely on purely spatial configurations, but on the correlation of transportation and land use. The first section of this paper focuses on theoretical considerations. It stresses the fact that conventional approaches do not apply in the present context. It then suggests an alternative based on areas of influence and measured in terms of level of attractance of land uses. The second describes a procedure based on this alternative following the remarkable contribution of Hanjoul, Beguin and Thill. An application of this procedure to the analysis of Shanghai is then examined. Finally, an evaluation of the strategies for optimizing the interrelationship between land uses is presented. The paper concludes with a possible research agenda.     

埋地管道防腐保温层失效评价

明确埋地管道防腐保温层的技术评价标准,对埋地钢质管道的安全运行,延长管道使用寿命具有重要意义。为了对埋地管道防腐保温层做出有效评价,从间接检测与开挖检测2个方面,结合现场检测数据,提出了基于防腐保温层的电流衰减率、绝缘电阻率、质量状况与厚度的分级评价标准及基于4种评价指标的综合评判方法。工程实践表明,该评价标准对防腐保温层是否存在失效能做出有效判断。     

城市轨道交通杂散电流监测系统概述

介绍了城市轨道交通工程中杂散电流不同的监测系统的构成,分析了集中式、分散式和智能型等监测系统的配置和功能,以及智能型实时在线监测系统的重要意义,为轨道交通工程杂散电流监测系统的选择与应用提供参考。     

实现多组态计量软件集中监控的可行性分析

天然气自动计量系统有多种组态软件,由于软件的不相通性,造成了计量系统数据采集的通用性差、数据传输与入库的时效性差、数据利用的可靠性低.结合各组态软件的实际情况,从设计上充分利用Oracle大数据处理能力以及Partition(分区表)的特性,实现历史数据的存储,应用WebService与COM+数据访问组件提供多层数据访问架构,采用OPC与DDE工业数据交换协议,实现了各站场计量数据的实时上传,为连续数据采集和实时监控提供了可能,节约了改造成本.     

注汽管道承压能力评估和实物试验验证

基于失效评估图技术对某注汽管道进行了承压能力评价,给出了管线在不同腐蚀壁厚情况下的极限承压能力和极限裂纹尺寸。并利用实物爆破试验验证了评价方法的安全性和有效性,通过对爆破断口进行宏观和微观分析,发现管段的开裂属于脆性开裂。     

Non-parametric analyses of efficiency of airports

This paper estimates the efficiencies and productivity changes of 12 international airports in the Asia-Pacific region based on data from 1998 to 2006. We apply stochastic frontier analysis (SFA) to compute efficiency estimates and use the Malmquist productivity index (MPI) to analyze productivity changes. We use the SFA model with a translog-type production function after testing the statistical hypotheses. According to the results of the SFA hypothesis tests, airports have experienced a technological regression; the deviations from the efficiency frontier are caused more by technical inefficiency than random noise. However, the inefficiency was found to decrease. The MPI reveals a declining trend resulting more from technological change than from efficiency change, with a decrease in inefficiency. Taken together, both the hypothesis tests and the MPI not only provide consistent conclusions, but also suggest that airports should concentrate on technological progress.     

波纹管应力分析研究进展

评述了波纹管应力理论研究方法的进展情况，围绕解析法、工程近似法和数值法，对波纹管理论研究中的一些主要成果作了较详细的回顾和总结，对各种研究方法作出了评价，展望了亟待解决的一些问题。     

Direct analysis of the perceived importance of attributes of reliability of travel modes in urban travel

Reliability of travel modes was found to be the most important characteristic of transportation systems in several attitudinal investigations of individual travel behavior. This paper represents the first part of a research effort aimed at gaining a better understanding of the characteristics of reliability of transportation modes in urban travel. In this research, reliability characteristics are identified; their importance relative to each other is assessed, and an insight into possible structure of an objective reliability index is discussed. The research is based on perceived values of reliability, which were identified through a large attitudinal survey conducted in the Chicago metropolitan area.