控制粉煤灰密实度以替代砂类土的原位测试

本文是一例研究粉煤灰替代排水砂沟中以黄砂为材料的原位试验。通过建立静力触探比贯入阻力与干容重的相关关系,找出达到设计要求的7.5 KN/m干容重的最佳夯实击数(振密遍数),从而有效地控制了粉煤灰的密实度。     

增强电子地图表现力的几个方面

电子地图是一种新兴的地图产品，正服务于社会的各行各业，提高电子地图的表现力，加大电子地图的服务力度，是人们对它的客观要求。但是，电子地图的设计坂理和方法还远远没有解决，电子地图的制作还没有统一的规范和标准。本文从图形界面、表现内容、功能接口等各方面，对加强电子地图表现力和改善它的制作方法进行了研究，这些具体的措施和方法在笔者制作的各种电子地图中得到了体现，反映很好。     

On the Age of the Ophiolitic Complexes in Northeastern Jiangxi:A Micropaleontological Analysis

The age assignment of cherts from ophiolitic/metamorphic complexes in northeastern Jiangxi is widely regarded as one of the crucial issues in the tectonic interpretation of South China. The ophiolitic and metamorphic complexes in northeastern Jiangxi have been traditionally regarded as part of the Proterozoic “Banxi (=Penhsi) Group” of the Jiangnan Uplift. However, recent reports of Late Paleozoic radiolarians from the rock complexes have caused some researchers to question the traditional interpretation of the tectonic and paleogeographic framework in the region; but other workers are suspicious about these findings. In order to test the validity of the putative radiolarians, we, an interdisciplinary study group including micropaleontologists, tectonic specialists and regional geologists, conducted field investigations and multiple re-samplings of the localities where the reported fossils were collected. Our comprehensive study shows that the chert of the ophiolitic complex and the associated low-grade metamorphic slate yield Mesoproterozoic and Neoproterozoic acritarchs, confirming the traditional view of their age assignment (Proterozoic); on the other hand, no recognizable radiolarian fossils have been discovered therein, thus raising questions about the recently published result of Paleozoic radiolarian findings. Probable causes for the putative radiolarian findings are thus discussed herein. Geochemical characteristics indicate that the chert sedimentation most probably occurred under a continental margin setting.     

GPS天线阵列变形监测系统设计及应用

GPS是监测大坝以及滑坡安全的有效手段。但是成本过高是限制其发展的关键问题,文中提出的GPS天线阵列变形监测系统很好地解决了这些问题,该系统利用GPS多天线共享器,有效降低了设备成本。此系统已长期运行于云南省漫湾水电站,通过实践证明GPS天线阵列监测系统拥有与常规GPS监测方法相当的精度,但大大降低了监测系统的成本。     

《中国近代地震目录（公元1912～1990年,Ms≥4.7）》简介

《中国近代地震目录（公元１９１２～１９９０年,ＭＳ≥４７）》是国家地震局科技发展司在“八五”期间组织编辑的两册新版中国地震目录中的第二册。本册目录对本世纪初以来中国地震目录做了较为系统、完整、详细的清理和总结,是现有目录的更新版本。本文简要介绍了本目录编制的原则、方法和内容。针对１９８３年版目录,新编目录修改和删除了１６９次地震条目;新增９６０次地震条目;新增等震线图１６６幅。新目录共编入ＭＳ≥４７的地震４２８９次,等震线图３２８幅。     

1：25万地图数据库更新中遥感影像的处理方法

卫星遥感影像已成为快速补充与更新地理信息的主要方法，以对1：25万地图数据库的更新为例，研究遥感影像选择预处理与变换定位的方法。     

Structural vibration control by shape memory alloy damper

A damper device based on shape memory alloy (SMA) wires is developed for structural control implementation. The design procedures of the SMA damper are presented. As a case study, eight such SMA dampers are installed in a frame structure to verify the effectiveness of the damper devices. Experimental results show that vibration decay of the SMA damper controlled frame is much faster than that of the uncontrolled frame. The finite‐element method is adopted to conduct the free and forced vibration analysis of the controlled and uncontrolled frame. The experimental and numerical results illustrate that the developed SMA dampers are very effective in reducing structural response and have great potential for use as efficient energy dissipation devices with the advantages of good control of force and no lifetime limits, etc. Copyright © 2003 John Wiley & Sons, Ltd.     

状态空间衡量区域承载状况初探——以环渤海地区为例

本文在回顾承载力研究的国内外发展基础上,指出单因素承载力对区域实际承载力的反映存在一定的局限性。作者通过利用综合多种因素的状态空间法求出综合的区域承载力,并以资源、环境与经济社会发展矛盾比较突出的环渤海地区为例,求算出环渤海地区现实的承载力情况。结果显示,环渤海地区目前资源环境处于超载状态,特别是水土资源和生态环境的超载情况非常严重。最后探讨了提高区域承载力的对策措施     

波速测试在高层建筑地基勘察中的应用--以遵义百货大楼岩土工程勘察为例

通过工程实例说明钻孔波速测试可定量划分岩体质量单元，确定岩体完整性系数，并利用岩体的完整性系数Kv作为同完整程度岩体承载力的类比指标。     

建筑施工中振动影响的测试分析

工程建设对房屋建筑的振动影响和破坏的测试鉴定是当今城市建设中一项迫切需要开展而又具有重要意义的工作。首次将地震学原理与工程抗震鉴定方法有机结合对大楼受桩基础施工振动的影响和损害进行测试和分析，其结果用震级和烈度的方式定量给出了振动影响的程度，继而对场地地基、基础和大楼进行了具体的抗震分析鉴定。