云南元-磨公路某高堑坡灾害发生机制及防治对策

论文根据现场地质调查,应用地质力学分析方法,分析了元-磨公路K235 160~600段高堑坡地质条件、病害发生机制和诱发因素。堑坡所在区域位于红河深大断裂与哀牢山深大断裂所夹持的哀牢山褶皱带内,属强烈侵蚀切割的低中山区,河流下切严重,河流阶地不发育。南溪河及其支流小曼萨河、叉河依附于不同时期生成的构造发育而成,堑坡位于小曼萨河注入南溪河的交汇部位小曼萨河的左岸。小曼萨河及南溪河所夹持的山体,尤其是堑坡所在的部位,已严重破碎、松弛,岩石似大块石堆垒状,坡面上的树木均明显地向小曼萨河方向倾倒。经地质力学配套分析,堑坡所依附的山梁形成于红河深大断裂生成期(γ4),堑坡岩体受多期构造活动的作用,其中NW65/°SW64°及NW63/°SW35°两组倾向临空的构造面控制坡体的稳定。堑坡具备发生变形破坏的地质条件,分析认为由于组成坡体的岩土强度不足而引起既有构造面的大型坍塌。连续降雨及温差是诱发因素。基于目前国内边坡防治技术、施工能力,提出了以“治”或“避”为主的防治对策。     

Monitoring of Over Cutting Area and Lubrication Distribution in a Large Slurry Pipe Jacking Operation

Slurry pipe jacking was firmly established as a special method for the non-disruptive construction of the underground pipelines of sewage systems. Pipe jacking, in its traditional form, has occasionally been used for short railways, roads, rivers, and other projects. Basically the system involves the pushing or thrusting of concrete pipes into the ground by a number of jacks. In slurry pipe jacking, during the pushing process, mud slurry and lubricant are injected into the face and the over cutting area that is between the concrete pipes and the surrounding soil. Next, the slurry fills voids and the soil stabilizes due to the created slurry cake around the pipes. Fillings also reduce the jacking force or thrust during operation. When the drivage and pushing processes are finished, a mortar injection into the over cutting area is carried out in order to maintain permanent stability of the surrounding soil and the over cutting area. Successful lubrication around the pipes is extremely important in a large diameter slurry pipe jacking operation. Control of lubrication and gaps between pipes and soil can prevent hazards such as surface settlement and increases in thrust. Also, to find voids around the pipes after the jacking process, in order to inject mortar for permanent stabilizing, an investigation around the pipes is necessary. To meet these aims, this paper is concerned with the utilization of known methods such as the GPR (Ground Penetrating Radar) system and borehole camera to maintain control of the over cutting area and lubricant distribution around the pipes during a site investigation. From this point of view, experiments were carried out during a tunnel construction using one of the largest cases of slurry pipe jacking in Fujisawa city, Japan. The advantages and disadvantages of each system were clarified during the tests.     

圆形标志中心子像素定位方法的研究与实现

采用回光反射材料制作圆形回光反射标志，经摄影后得到标志的“准二值影像”；对标志的椭圆影像进行亚像素边缘提取，经最小二乘椭圆拟合后得到标志中心的子像素级位置。试验表明，可以达到0．02像素的定位精度。     

图像平滑算法比较研究及改进策略

图像平滑作为去除图像中含有噪声的图像增强处理技术，是各种与图像有关软件中必不可少的功能模块。文中在分析噪声模型的基础上，对均值平滑、中值平滑、边缘保持平滑等技术从图像处理空间域中的算法原理、实现方法及效率等方面进行了详细比较。针对图像中含有的不同噪声模型，通过多次试验，得出了值得从事图像处理研究者参考的结论。这将有助于提高图像处理软件开发的效率。     

成都粘土路堑边坡防护研究

成都外环路高速公路东半环超过有20km的路段处在成都粘土分布区，针对成都粘土的易滑性，本文提出了全封闭的浆砌片石护坡，土钉墙，非全封闭的锚杆框架护坡，钢纤维混凝土喷锚全封闭护坡，重力式挡土墙等五种方法处理成都粘土路堑边坡工程，施工实践表明，这些方法行之有效，在该类土的边坡防护中值得推广。     

Electrons in feldspar II: a consideration of the influence of conduction band-tail states on luminescence processes

 Most natural feldspars contain many charged impurities, and display a range of bond angles, distributed about the ideal. These effects can lead to complications in the structure of the conduction band, giving rise to a tail of energy states (below the high-mobility conduction band) through which electrons can travel, but with reduced mobility: transport through these states is expected to be thermally activated. The purpose of this article is twofold. Firstly, we consider what kind of lattice perturbations could give rise to both localized and extended conduction band-tail states. Secondly, we consider what influence the band tails have on the luminescence properties of feldspar, where electrons travel through the sample prior to recombination. The work highlights the dominant role that 0.04–0.05-eV phonons play in both the luminescence excitation and emission processes of these materials. It also has relevance in the dating of feldspar sediments at elevated temperatures. Received: 11 May 2001 / Accepted: 6 September 2001     

生态交界带特征与动态变化机理分析

文章论述了生态交界带是两个以上生态系统交接的过渡带，它具有特有的生态系统结构，生态交界带生态系统的结构，功能和物质，能是以及信息的交流与相邻生态系统有密切的联系，但又表现出明显的异质性，其动态变化机理显示生态交界带内物质，能量和信息的均衡状况。     

轻质填充墙异型柱边框架抗震性能试验研究

本文重点研究了轻质填充墙异型柱边框架的层刚度衰减过程，承载力和弹塑性性能．     

JRC修正直边法的数学表达

JRC是反映爬坡角力学效应的岩体结构面表面形态等效描述指标。本文在爬坡角力学效应机理研究基础上, 阐述了JRC直边法的物理意义；通过岩体结构面表面起伏幅度与金属表面粗糙度幅度对比分析, 肯定了直边法的合理性；考虑JRC的尺寸效应, 推导JRC修正直边法的数学表达式, 编译计算机常用程序。最后, 实例检验了JRC修正直边法数学表达式的合理性和可用性。     

刃具斜切入破岩的试验与研究

介绍了刃具斜切入破岩的试验装置及试验结果，推导出了跃进载荷的计算公式，并对试验结果进行了理论分析，探讨了影响刃具侵入岩石难易的因素和影响破岩比功大小的因素。