粘土矿物分子片段Si_6O_(18)H_(12)、(Si_5AlO_(18)H_(12))~-和(Si_4Al_2O_(18)H_(12))~(2-)的计算研究     

刘耘 《矿物学报》1996,(2)

采用最新的量子化学半经验计算方法MNDO－PM3，对作为粘土矿物结构基元的六元环分子体系进行了结构与能量的计算，揭示了结构变形的精确程度，并利用能量的差异大小，讨论了几种同分异构体的稳定性。  相似文献   

四川旺苍粘土的物相分析及应用     

陶专  孙传敏 《矿物岩石》1996,16(3):13-19

作者在四川旺苍产出的一种硬质粘土作物相分析，并对其主要工艺性能进行讨论的基础上，评价了四川旺苍粘土的应用及开发前景。旺苍粘土最适用于作耐火原料，其次是陶瓷原料，是一种急待开发的利用非金属矿产资源。通过对旺苍粘土的应用研究，可为合理开发利用四川地区紧缺的粘土资源提供有益的思路。  相似文献   

Live load induced vibrations in Ullevi Stadium - dynamic dynamic soil analysis   总被引：1，自引：0，他引：1  

Sigurdur Erlingsson  Anders Bodare 《Soil Dynamics and Earthquake Engineering》1996,15(3):171-188

The paper describes a case history where during two rock music concerts the audience at the large outdoor stadium Nya Ullevi, Gothenburg, Sweden, started to jump in time to the music. Violent vibration levels occurred in the ground and a part of the audience observed considerable motion in the structure. Based on finite element analysis, it is concluded that the underlying soft clay of the structure was excited with the same frequency as the beat of the music. The whole clay deposit under the stadium started, therefore, to vibrate with great variations in amplitudes over the field due to the complex geometry. Through interaction with the basement of the structure as well as its deep foundation the waves were transmitted to the superstructure. Parts of the structure framework have natural frequencies close to those of the beat. Consequently they started to vibrate violently.  相似文献   

用有机粘土化学研究生油理论   总被引：2，自引：1，他引：2  

王行信 《海相油气地质》1996,1(4):33-39,25

有机粘土化学反应是自然界广泛存在的一种具有重要意义的反应。有机粘土化学因得到广泛应用和发展而被认为是２１世纪的科学。沉积物中的有机质绝大部分以粘土－有机质复合体形成存在。粘土吸附有机质是促使有机质富集和沉积的最重要因素。  相似文献   

贵州碳酸盐岩红土中的粘土矿物及其形成机理   总被引：13，自引：2，他引：13  

朱立军  傅平秋 《矿物学报》1996,16(3):290-297,T001

本文运用Ｘ射线衍射、红外光谱、差热、透射电镜和扫描电镜等方法对贵州碳酸盐岩红土中的粘土矿物进行了系统研究。高岭石和０．７ｎｍ埃洛石是碳酸盐岩红土中的主要粘土矿物，其次为伊利石、蛭石、绿泥石、绿泥石／蛭石混层矿物，水铝英石和三水铝石等。  相似文献   

细粒自生粘土矿物和粘土岩定年尝试   总被引：2，自引：0，他引：2  

张建宇  李喜斌  许荣华 《地球学报》1997,18(Z1):277-279

细碎屑沉积岩定年是地质年代学领域的一个难题。由于生产和科研需要，曾对一些含油盆地泥岩等岩石做过K-Ar和激光显微探针40Ar-39Ar定年尝试，探索了一些样品处理及定年技术，取得了部分成果。  相似文献   

饱和软粘土在不排水循环荷载作用下孔隙水压力模型的建立   总被引：3，自引：0，他引：3  

许才军  杜坚 《上海国土资源》1997,(3):16-21

通过应力控制式循环三轴试验,研究了饱和软粘土在不排水循环荷载作用下的性状。在考虑影响循环 特性因素的基础上,建立了一种适合上海地区饱和软粘土孔隙水压力的增长模型。  相似文献   

Design and performance of a compacted clay barrier through a landfill     

D. C. Wijeyesekera  K. O'Connor  D. E. Salmon 《Engineering Geology》2001,60(1-4):295-305

This paper presents the construction and performance details of a compacted London Clay barrier that was designed to prevent any leachate or methane penetrating a stretch of the cut and cover box section tunnel of the London Heathrow Express Rail Link. The barrier was constructed with London Clay that was spoil from concurrent bored tunnelling operations on adjacent sites. Laboratory investigations carried out on the compacted London Clay are presented in the paper. These indicated that it was possible to design the clay surround to function as a barrier protecting the structure from the ingress of the leachate. Field monitoring using magnetic extensometer gauge measurements indicate that the consequent ground movements are lower than that predicted by the laboratory tests.  相似文献   

Land disposal of river and lagoon dredged sediments   总被引：1，自引：0，他引：1  

M. S. S. Almeida  L. S. Borma  M. C. Barbosa 《Engineering Geology》2001,60(1-4):21-30

The Jacarepaguá lagoon system, in the Western part of the city of Rio de Janeiro, Brazil, with an area of 8 km² receives the contributions of a number of rivers crossing largely populated and industrial areas without adequate sanitation and drainage. Since 1996 studies have been carried out to assist future dredging works and disposal of rivers and lagoons sediments. These studies included full characterization of these sediments and evaluation of the contamination of the dredged material with emphasis on the assessment of heavy metals. The present paper report these studies to assess a large dredging programme of about 3.8 million m³ of the river basins and 4 million m³ of lagoons sediments to be disposed inland.  相似文献   

择优取向在粘土矿物X射线衍射定量分析中的应用研究   总被引：3，自引：0，他引：3  

吴乾荣 《岩矿测试》1996,15(2):147-149

采用Ｋ值法，以蛇纹石或白云母矿为参比物，利用晶面的择优取向，对蒙脱石粘土、海泡石粘土、凹凸棒石粘土和高岭石粘土进行Ｘ射线物相定量分析，取得满意结果。同时总结出这些粘土矿物的Ｋ值，并在此基础上讨论与择优取向相关的问题。  相似文献