深厚软土地层中深基坑支护结构变形分析与应对措施

以某深基坑在深厚软土地层条件下支护结构的变形为背景,结合理论计算与现场实测数据,对软土地区基坑支护结构的变形情况进行分析对比,提出深厚软土地层下支护结构设计及施工方面的注意事项,同时将分析结果应用于其他类似工程,减少深厚软土地区深基坑开挖风险,为后续类似工程积累经验。     

双排桩在草海片区某深基坑工程支护结构中的应用

通过昆明草海片区某软土区域深基坑工程实例,介绍了双排桩在软土深基坑支护结构中的应用。通过采用双排桩支护,解决了本工程在周边用地条件受限情况下的基坑支护问题,同时通过此次双排桩在软土地区的应用,积累了一定的经验。对基坑水平位移和深层位移的实际监测表明,该支护形式具有较大的刚度、较好的变形适应性和稳定性,在软土地区采取一定的技术措施后,该支护形式能够实现既定的目标。     

软土地基深基坑支护结构方案选型

针对软土地基的工程特性和深基坑支护的基本要求 ,结合工程实例 ,对软土地基深基坑支护结构方案的选型进行了探讨     

珠江三角洲区域深基坑支护结构破坏分析

软土地区深基坑支护结构的破坏是导致基坑事故频发的主要因素之一,特别是珠江三角洲区域基坑的安全事故较为频繁,如何因时因地合理选择支护类型、设计支护结构是避免基坑事故的重要方式。本文着重介绍各类支护结构及其适用条件,分析各类支护结构的可能破坏因素,提出避免软土地区深基坑破坏的最佳支护方式,为深基坑支护设计提供参考依据。     

SMW工法在福州软土深基坑支护中的应用

在福州软土地区开挖超过9米的深基坑支护中,以前大多采用混凝土桩加内支撑体系,但造价高、工期长;本工程首次成功运用SMW工法进行深基坑支护,为深厚软土中的基坑支护提供了新的选择。     

软土地区基坑支护方案

结合工程实例,详细的阐述了在软土地区采用止水帷幕结合锚喷支护结构形式进行深基坑支护的设计及质量控制要点,为今后类似基坑支护设计提供了工程经验。     

软土地基建筑物深基坑支护方案比选例析

本文结合工程实例,针对软土地基的工程特性和深基坑支护的基本要求,对软土地基深基坑支护结构方案的选择进行了探讨。     

采用水泥土拱与灌注桩组合的空间支护结构

软土地区临江大面积深基坑采用拱形水泥土架刚架式钻孔桩空间组合支护结构作为挡土防渗支护体系，可充分利用桩的空间组合效应，发挥水泥土抗压强度高的性能，其结构形式新颖，受力合理，挡土防渗安全可靠，应用在软土地区不能采用锚杆和内支撑的狭窄场地的大面积深基坑支护工程中，具有独特的优越性。     

组合式支护技术在基坑工程中的应用

软土地区大面积深基坑采用组合式支护结构作为挡土防渗支护体系,可充分利用场地的空间效应,发挥钻孔桩、深搅桩、放坡锚杆在不同位置不同支护结构性能中的优势,有效地进行组合,保证邻近建(构)筑物、道路及管线的安全。这种支护形式在软土地区大面积深基坑支护工程中具有独特的优越性和经济性。     

软土地基深基坑支护技术的探讨

通过成功的大型基坑支护工程实例的介绍，总结水泥搅拌桩和树根桩联合支护结构在软土地基深基坑支护中的应用，体现了以水泥搅拌和树根桩为主体的联合支护结构的重大经济优势，为软土地基深基坑支护提出更经济、安全的新型支护型式。     

浅析高速公路工程招投标中的最低评标价法

结合目前高速公路施工项目招投标活动的实际情况,阐述了最低评标价法的概念,归纳了其优点及存在问题,对完善最低评标价法提出几点策略,以期促进招标投标市场更加规范有序。     

Place-Making in Megaprojects in Melbourne

This article analyses state-led place-making practices in Melbourne. The two levels of government that influence planning in Melbourne make much of the city as ‘culturally vibrant’ and ‘creative’, and have incorporated creative city-inspired place-making principles into many layers of the planning system. An examination of the development of two mixed-use megaprojects in central Melbourne reveals however that ideals of culturally engaging public places, and indeed of creative landscapes for middle-class consumption, wither in the face of more basic imperatives for economic development. In these case studies the ‘creative city’, no matter how the idea is interpreted, has little traction either as a set of inclusive place-making principles or as a gentrification strategy. The article concludes that the creative city-inspired place-making objectives in the planning system at both state and local levels are ambiguous in their overall intents and completely unsupported by statutory controls. Such place-making objectives as are realised are the compromised results of the interplay of uncoordinated decisions, delivered at the pleasure of the developer.     

Pathogens in septage in Vietnam

Septage is widely acknowledged as a major source of infectious pathogens while disposal of septage, and the operation and maintenance of septic tanks, is not regulated in many developing countries. Twenty untreated septage and septage sludge samples were taken from Can Tho City, Vietnam to examine their pathogen content, and indicator micro-organisms. Escherichia coli and Enterococcus spp. were detected in all samples, regardless of sludge storage time. Phages were detected in 80% of samples. Salmonella spp. were detected in 70% of the untreated septage and 60% of septage sludge samples. Concentrations of phages and bacteria tested in septage sludge after many years of tank storage were much higher than the expected levels. Helminth ova were present in 95% of untreated septage samples with an average of 450 ova l^− 1, and were detected in all septage sludge samples with an average of 16,000 ova l^− 1. Twelve varieties of helminth ova were identified. More helminth ova varieties in higher concentrations were found in septage than those reported from stool samples. The varieties' frequency ranged from 10% to 50% and Ascaris lumbricoides predominated. Results show that pathogens and indicator micro-organisms, especially helminth ova, accumulate in sludge. Thus helminth ova should be considered when septage sludge is treated and used for agriculture. Proper health protection measures must be applied for people handling septage.     

新时期广东城市化的新特点

新时期广东城市化出现以下特点:知识源导向、城市由单体向群体化发展、产业集群推动、政府主导自上而下的集约化发展、城镇化向城市化转变、由重“数量”发展向重“质量”发展的转变。     

在市场中实践在实践中学习在学习中进步--工程公司市场化进程的回顾与展望

近两年来，工程公司在提高市场竞争意识、推动市场化进程中做了大量工作，其中坚持走出去的方针是我们自我加压、推行加快市场化步伐的一个重要战略步骤。     

新形势下高校强化基建财务管理的探讨

在市场条件下高校基建财务人员在加强日常财务管理的同时,必须树立起高度的工作责任心,抓好事前监督、事中监督、事后监督三个环节,全面理解、贯彻执行《高等学校财务制度》,管好用好各项基本建设资金,提高基建财务管理水平,更好地完成高校各项基建任务,以有限的投资,最快的建设速度,获得最大的投资效益。     

Experiences in radon-safe building in Finland

A study was made of radon-safe buildings in 300 Finnish low-rise residential buildings using data obtained from a questionnaire study. The study also aims at finding the main defects in design and implementation and how the guidance given on radon-safe buildings in slab-on-grade houses has been followed. According to the guidelines, the prevention of the flow of radon-bearing air from the soil into the house is recommended to be carried out through installation of aluminised bitumen felt and use of elastic sealants. Second, as a precaution perforated piping should be installed in the subsoil of the floor slab. The median indoor radon concentration in the houses was 155 Bq/m3. This is 32% lower than the median of the estimated reference values. The action level of 200 Bq/m3 was still exceeded in 40% of the houses. In most houses with slab-on-grade the prevention was based only on the installation of a sub-slab depressurisation system. Sealing was performed in a low number of houses. In 80% of houses with a sub-slab piping connected to an operating fan, radon concentration was below the action level of 200 Bq/m3. In houses with piping but no fan, the corresponding fraction was only 45%. Sub-slab piping without a fan had no remarkable effect on radon concentration. In houses with crawl-space and edge-thickened slabs, radon concentrations were low. The choice of foundation system thus significantly affects the indoor radon concentration. The importance of complete and careful sealing work should be stressed in advice and guides concerning radon prevention.     

2008年日本火灾情况

<正>1火灾总数在2008年(1～12月),日本发生的火灾总数为52 394起,与2007年相比减少了2 188起(4.0%)。这相当于平均1天大约发生143起火灾,每10min发生一起火灾。火灾类别(见表1)。     

Variation in property taxation in Tulsa

Conclusions It may be reasonably concluded from this study that the range of variation in these ratios of assessed to actual value are of a reasonable size for the great majority of cases. The frequency distribution of these sample ratios was not normal, however, as was assumed a process of this type would produce. On the other hand, the failure of the regression analysis to identify any significant variables which would explain these variations would tend to re-enforce the assumption that the fluctuations were indeed of a random nature.To sum it up in one paragraph, aside from a few extreme cases, the assessing process appears to give estimates which are more consistent than would be expected under the assumption that any errors would be of a random nature, but the regression analysis was unable to isolate any particular socioeconomic characteristics which would explain the variation which was present.Financial support for this research project was furnished by the University of Tulsa.     

谈城市历史保护规划的误区

由于缺乏起码的历史文化知识,忽视历史文化遗产的保护,错误的决策导致了建设性的破坏,要加强城市保护的教育,培养合格人才。