软土地区深基坑开挖的环境效应及其工程对策

简要介绍软土地区深基坑开挖对周围环境引起的影响和危害，并提出了相应的环境保护原则和方法，为软土地区深基坑工程的设计和施工提供有益的借鉴。     

Epitaxy of rare earth element fluorcarbonate minerals from carbonatite dyke at Bayan Obo, Inner Mongolia, China

Rare earth element fluorocarbonate minerals such as bastnaesite and parisite are firstly discovered in carbonatite dykes from Bayan Obo, Inner Mongolia, China. Bastnaesite rarely occurs as homogeneously single crystal, but contains microfine phase of parisite. They form regular intergrowth along (0001) plane net, which is identified as epitaxy. This eptactic texture results from the variation of chemical composition of crystallizing agents of those minerals that crystallize directly from carbonatite magma.     

水泥搅拌桩复合地基研究

针对南河闸水涨搅拌桩复合地基的物理力学模型,采用有限元数值计算方法,对复合地基结构设计中的关键问题－－最优转换率和综合模量进行了研究,并对南河闸复合地基结构进行了非线性应力分析,得到了以复合地基的承载力和地基加固处理的工程投资为目标的最优置换率。研究结果表明,复合地基的综合模量随置换率的变化并非呈线性关系。     

黏土湿型砂透气性对铸造件机械性能的影响

介绍了黏土湿型砂透气性对铸件机械性能的影响,提出了控制型砂透气性的若干方法.     

高效活性白土的研制

以河南某地膨润土为原料，用硫酸对其活化，详细研究了活化过程中固液比、硫酸浓度、反应时间及反应温度对活性白土质量的影响，成功地制备出脱色力大于200、活性度超过国家化工行业标准规定的各类一等品标准的高效活性白土。     

湘南高液限粘土路用填料改良研究

为了对湘南高液限粘土进行路用填料改良研究,分别对其进行了石灰、粉煤灰、水泥、石灰加粉煤灰以及砂砾的改良试验.试验结果表明,高液限粘土采用4%、5%的石灰改良后,CBR值分别提高了12.5,14.3,14.7和16.1,15.6,16.0倍;经粉煤灰改良后的高液限粘土CBR强度改善不明显;采用3%、4%的水泥改良后,高液限粘土CBR值分别提高了9.0,9.0,9.2和12.3,12.8,13.8倍;石灰和粉煤灰联合改良后,高液限粘土CBR值分别提高了6.5,7.1,8.1和15.0,15.8,16.8倍;采用砂砾改良后,高液限粘土CBR值分别提高了4.4,4.4,4.7和6.0,6.0,8.4倍,同时,还可改善其开裂特性.表6,参8.     

论新型墙体材料的发展

介绍了新型墙体材料的发展现状，针对新型墙体材料发展中的问题，提出了应对措施。     

排水固结法软基处理现场测试研究

土体稳定性控制是软土地基处理施工过程中的一个重要因素，通过工程实例，揭示了在福建沿海深厚软土地区采用塑料排水板堆载预压处理软基的效果是非常显著的，在施工中结合现场监测是非常必要的。     

Clay minerals in paleosols of cretaceous age in Istria, Croatia

Greenish clays often occur as thin layers in Early Cretaceous shallow-water carbonate sediments of Istria where they mark the top of fining upwards sequences. When they show evidence of subaerial exposure and pedogenesis they are considered paleosols. The clay mineralogical composition is as follow: (1) randomly oriented I/S mixed layer, (2) regularly oriented I/S mixed layer, (3) illitic material, (4) kaolinite and (5) chlorite. The insoluble limestone residue situated immediately below the greenish clays is dominated by smectite, and also contains kaolinite and illitic material. The very high smectite content in the insoluble residue is probably the result of additions of volcanic dust during carbonate sedimentation. That clay mineral composition in the pelitic material clearly indicates the influence of both pedogenic and diagenetic processes. It may also indicate additional volcanic dust contribution before and during the subaerial exposure.     

苏州鹤泾地区沉陷探究

采用精密磁法测量，电测深，水准测量等技术手段对苏州鹤泾地区的地面沉隐进行了测量，并以大量数据分析了地层压缩导致地面沉陷的机理，最后对沉降发展趋势发展了半定量预测。