建筑垃圾再生料的工程分类及其特性研究

介绍了建筑垃圾的组成和加工工艺,参考已有的研究成果及工程实例,摸索出一套室内试验研究方案,旨在通过室内试验了解建筑垃圾再生料的基本路用性能,研究建筑垃圾的基本物理力学性质,并得出相应指标。     

北京第三系粘土岩的工程特性研究

在北京市区西部工程建设中常遇到第三系粘土岩,特殊的成岩历史和成岩作用使其具有独特的工程特性。本文以第三系粘土岩的现场观测及室内试验结果为基础,研究了第三系粘土岩的地质特征、物理力学性质,并对其环境影响效应及开挖条件下强度的变化进行了分析,提出基坑施工时应采取适时快速开挖、快速封闭和围（支）护的处理方法。研究结果对工程建设具有一定参考价值。     

A proposed weathering classification for basalts and their engineering properties (Turkey)

Most of the volcanic rocks widespread in Turkey are basalt. The effect of weathering processes on the physical and mechanical properties of this type of rock is important. To assess these properties and relations to each other, a study was undertaken in the Niksar region. A detailed investigation was carried out on basalts in the road cuttings of the Niksar ring road and Ünye-Akku?-Niksar highway alignments. A new classification system for basaltic rocks which are substantially influenced by weathering is proposed. The basic engineering properties of the basalt representing each weathering grade were determined. The properties tested are dry density, porosity, coefficient of permeability, uniaxial compressive strength, tensile strength and Young’s modulus. Interrelationships were determined for all test results. It is concluded that there is a substantial degradation in the engineering properties of the rock beyond a specific degree of weathering.     

Some special geotechnical properties of pumice deposits

 This paper describes the characteristics of pumice soils from the area of Mount Vesuvius and discusses sinking, watering and other geotechnical tests on pumice from a number of sites. Attention is drawn to the presence of both inter- and intra-particle voids within this material and appropriate modifications to the standard solid-water-air phase diagram are suggested to take account of this. The importance of understanding the structure of the pumice and its response to rainfall/ground water conditions is discussed in relation to both landslips and stabilisation works. Received: 30 September 1997 · Accepted: 20 January 1998     

Shear wave velocity and geotechnical properties of tailings deposits

Bulletin of Engineering Geology and the Environment - This paper presents the results of subsurface shear wave velocity Vs measurement of tailings deposits (tailings sand and slime) at 4 tailings...     

Estimation of strength and deformation properties of Quaternary caliche deposits

The aim of this study was to develop and evaluate statistical models for predicting the uniaxial compressive strength (UCS) and average Young’s modulus (E _av) for caliches, using some index and physical properties. The caliche samples, from Adana, southern Turkey, were of low strength and difficult to sample. X-ray diffraction and microscopy were undertaken and the following physical parameters established: unit weight, apparent porosity, Schmidt rebound number, Shore hardness, P-wave velocity, slake durability, point load, uniaxial compressive strength and average Young’s modulus. Simple and linear regression variable selection analyses were performed. The best relationships were obtained for UCS with P-wave velocity and unit weight and for average Young’s modulus with P-wave velocity, porosity and slake durability. Empirical equations are proposed, although it is emphasised that these may only be applicable for caliche of a similar geological character.      

A comparison of panchromatic,color and infrared color aerial photographs with references to their applicability to the mapping of quaternary deposits for purposes of engineering geology

The study deals with the applicability to the engineering-geologic mapping of Quaternary deposits of three types of aerial photographs, involving the use of panchromatic, color and infrared color films — especially with regional planning operations in view. Infrared color film proves in many cases to be the best suited for interpretative purposes, for the accuracy of the interpretional results is independent of the different types of Quaternary deposits. Effective utilization of color and infrared color aerial photographs in engineering-geological planning tasks calls as a rule for differentiation of color nuances.

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Resume L’étude porte sur l’utilisation, pour la cartographie de la géologie de l’ingénieur, de photographies aériennes réalisées avec trois types de films c.à.d. panchromatique, en couleurs et infrarouges en couleurs, particulièrement pour des taches de planification régionale. Le film infrarouge en couleurs s’avère dans de nombreux cas le mieux indiqué par son interprétabilité, car la précision du résultat d’interprétation demeure inchangée pour les différentes espèces de sol. Une exploitation efficace de la géologie de l’ingénieur des photos en couleurs et infrarouges en couleurs pour les taches de planification régionale suppose en général toujours la distinction des nuances.

     

Aggregate properties of Devonian limestones for use in concrete in Istanbul,Turkey

Limestones are the major source of crushed rocks for use in concrete in Istanbul. The existing quarries are located in a variety of limestone types. The study reported here was carried out in the Kartal Quarry in eastern Istanbul. The physico-mechanical properties of limestones of different compositions and textures were determined and the results were compared with those from standard aggregate tests. The relationships between all parameters were described by simple regression analyses. Kartal Quarry produces coarse aggregates, which are considered suitable for concrete. Laboratory testing of limestones with different compositions from Kartal Quarry indicates that fine-grained micritic limestones have superior mechanical and physical properties compared to other limestones.     

Characterization and correlation of engineering properties of basalts

Bulletin of Engineering Geology and the Environment - Basalts are a common lithology found beneath Lisbon and are the predominant rocks of the Volcanic Complex of Lisbon (CVL) (72 Myr). These...     

Cengiz Bektas and the Community of Kuzguncuk in Istanbul

Situated on the slopes of the Bosporus, Kuzguncuk is a historic suburban area of Istanbul made up of traditional Ottoman houses mixed with 20th-century apartments and terraces, though retaining the Ottoman street and block topography. Encompassing Muslim, Jewish and Christian Orthodox communities, it is a microcosm of what Istanbul has to offer. English architect David Height, who had the opportunity to work for Cengiz Bektas for a year in his studio in Kuzguncuk, describes Bektas's role in the regeneration of the area. Copyright © 2005 John Wiley & Sons, Ltd.     

Study on the geological and engineering aspects of anhydrite/gypsum transition in the Arabian Gulf coastal deposits

Evaporitic geology, hot and arid climate, fluctuating relative humidity, and an alkaline environment governed the evolution of sedimentary deposits in the Arabian Gulf coast. Calcium sulphate generally occurs as anhydrite in the unsaturated surface layer of local soil formations. Anhydrite hydrates to gypsum with an associated volume increase of up to 63%, whereas gypsum dehydration results in a reversal back to anhydrite that leads to 39% volume decrease. Swelling and compressibility problems are common in several coastal deposits of the globe. This paper investigates the geological and engineering aspects of anhydrite/gypsum transition in the Arabian Gulf coast. Oedometer test results on Dammam anhydrite were studied in conjunction with morphological assessments at critical volume change stages. Results indicated 10% swelling potential and 295 kPa swelling pressure for hydrating anhydrite. The compression index of anhydrite and gypsum were 0.067 and 0.12, respectively, whereas the rebound index of anhydrite was 0.023.      

建筑大巴扎--伊斯坦布尔之行

2005年7月5日中国建筑设计研究院一行9人以及城建集团4人组团赴土耳其首都伊斯坦布尔参加二十二世界建筑师大会.会后考察团对西班牙、葡萄牙进行了建筑考察.时值欧洲十年来罕见的夏天,在这个干热的地中海的夏天,一行人克服旅途劳顿,以每天一个城市,日行程3000公里以上的速度参观了众多经典新老建筑作品,到达的城市有伊斯坦布尔、托兰多、马德里、里斯本、毕尔巴鄂、萨拉戈萨、波尔图、巴塞罗那等十几个城市(见图1),拍摄了大量资料照片.在此我们将旅途中汇集的资料与心得连缀成篇与大家分享.     

塑料类管材及其在暖通工程中的正确应用

介绍了塑料类管材的种类、强度验算、壁厚计算和许用设计应力确定,提出了塑料类管材在选择应用中应注意的一些问题,比较了各种塑料管的物理力学特性。     

工程施工安全中存在的问题及对策

根据工程施工安全方面的工作经验,提出了目前施工中安全方面存在的问题,并对相应问题的解决办法进行了论述,以使施工安全管理走上制度化、规范化、科学化的发展轨道。     

谈工程建设监理若干问题及对策

结合实践经验,从国家法律法规、监理单位内部管理、地方建设行业监管部门三方面,分析了工程建设监理中存在的若干问题,并探讨了相应的解决策略,从而促进监理行业的健康发展。     

粉煤灰砌块的性能及在工程中的应用

1　前言近几年来 ,国内不少单位开展了粉煤灰小型空心砌块的研制和开发工作 ,据非正式统计 ,该砌块生产企业已有 30多家。粉煤灰小型空心砌块具有原材料来源广泛、生产工艺简单、施工方便、操作灵活等特点 ,而建筑综合造价又略低于粘土多孔砖 ,因此被认为是替代粘土砖理想的墙体材料。为了促进粉煤灰小型空心砌块的健康发展和推广应用 ,原国家建材局在 2 0 0 0年正式颁布了粉煤灰小型空心砌块行业标准。在上海 ,对发展粉煤灰小型空心砌块 ,业内人士存在较多分歧 ,为了慎重对待粉煤灰小型空心砌块在上海地区的发展 ,上海市粉煤灰综合利用办公…     

尔丹盾爱尔康地台第四纪沉积物的热物理性质(英文)

对于爱尔康地垒第四纪沉积物的地热性的有效值和物理参数而言,其事实上不仅是构成沉积物的活性层,而更有助于评价爱尔康煤矿冻土区的基础设施和工程。爱尔康地垒沉积物的厚度从几米到十几米,这以下的事实相符,在第四纪大地构造发展阶段,爱尔康地垒遭受了弧形块的不同的振幅和强度的不断膨胀。根据从初始到第四纪沉积残留物选出渣油,洪积层,崩积和冲积层。他们是由花岗岩片麻岩组成的。在岩石材料较多的斜坡上的渣油和冲积层,其由砂和粉砂组成结合砾石和粗砾石。在超过10种类型的土壤元素工程地质剖面上,其热导率为0.50~2 W/(M·K),其热导率如下:堆积层为1.51 W/(M·K)、洪积层为1.32 W/(M·K)、冲积层为1.50 W/(M·K)。对于给出的爱尔康矿区工程地质段的主要元素物理和热物理参数的平均值和极限值而言,由所呈现的元素的组合构成。在德林达河段呈现爱尔康岩性剖面特征,在科纳-苏拉河头,沿着Uzky支流和1号营矿所设计的道路也呈现出这一特征。所有类型的矿床成因和位置的地形形式:分水岭,斜坡和山谷都包括在内。获得爱尔康地垒第四纪沉积的整个厚度的热物理性质和物理参数的有效值,是以表的形式汇总,该有效值有助于预测基础设施和周边炼油设施,并为热分析的爱尔康铀矿床的开发提供了依据。     

硫铅同位素研究进展及其在硫化物矿床中的应用

硫铅同位素示踪技术是地球化学研究领域中的一项重要内容。从离线分析到在线分析,从复杂的样品制备分析到原位微区分析,硫铅同位素示踪技术发展迅速,分析精度得到显著提升。通过梳理硫铅同位素的理论与技术研究进展,对比常用的热电离质谱（TIMS）、多接收电感耦合等离子体质谱（MC-ICP-MS）、二次离子质谱（SIMS）、激光剥蚀（多接收器）电感耦合等离子体质谱[LA-(MC)-ICP-MS]等检测技术的优缺点,并以那茶淌、百炉沟、乌斯河铅锌矿床为例,说明运用多种硫铅同位素分析技术组合来示踪矿床成矿物质来源具有较好的效果。LA-(MC)-ICP-MS不仅有可原位、实时、快速分析的优点,还具有高空间分辨率、高灵敏度、多元素及其同位素比值同时测定的优势,但仍存在基体效应和激光诱导分馏问题,期望更多基于硫铅同位素的研究推动其分析技术革新及成果应用。