无明显滑面岩质边坡危险滑移路径搜索

对无明显滑面岩质边坡危险滑移路径的搜索算法进行了改进研究,提出以总抗滑储备密度最小为判据的动态规划方法来确定边坡的危险滑移路径及其安全系数大小的方法,并通过算例得到了验证。     

Mauritania Slide Complex: morphology,seismic characterisation and processes of formation

Recently acquired Parasound and high resolution multi-channel seismic reflection data have afforded a more detailed investigation of the Mauritania Slide Complex. The slide is more complex than previously reported, and has affected an area in the order of 34,000 km² between ∼ 600 and > 3,500 m water depths. The ovate-shaped slide displays a long run-out distance > 300 km. Slide formation was pre-conditioned mainly by uninterrupted deposition of upwelling-induced organic-rich sediment in an open slope environment which gave rise to rapid accumulation of poorly consolidated bedded sediment intercalated with thin weak layers. The stages of slide development were characterised by multiple failure events probably occurring mainly as retrogressive sliding which exploited widespread weak layers as glide planes. The study suggests excess pore pressures as being the most important trigger mechanism for slide formation. Earthquakes associated with nearby Cape Verde Islands may have played a mostly complementary or, at one time, a leading role in triggering sediment failures. Diapiric growths have locally triggered minor instability events which resulted in remobilizing of pre-existing debris flows as well as translational sliding. The combined activities of all these triggering factors are the most like cause of the complex morphology of the Mauritania Slide Complex.     

A procedure for preparing large sets of diatom slides from sediment cores

A procedure is described for making diatom microscopy slides from large numbers of sediment samples, simultaneously. The method uses small sediment samples, small test tubes, small amounts of hydrogen peroxide, no decantings, no centrifuging, and it requires no washing-up of glassware. It is, therefore, fast, cheap, gentle to the diatoms and needs little fume cupboard space.     

肺瘢痕癌的CT诊断

本文对病理证实的9例瘢痕癌进行了CT 分析,其中5例(55.6%)。发生于结核好发部位,6例病灶形态不规则(66.7%),5例瘤体内可见钙化(55.6%)。作者认为瘤内钙化不是良性肿瘤的可靠指征,并指出小间隔薄层扫描的应用对发现病灶尤为重要。     

动力头式钻机滑架变角油缸行程和支点位置的确定方法

通过建立动力头式钻机沿架变角油缸的行程和支点位置的函数关系，并利用计算机进行循环运算，得出油缸行程和支点位置的计算结果的实例，笔者提出了对计算此类问题的看法。     

长江河口南支水下地质灾害的初步研究

本文根据笔者在1984—1988年期间,从事长江河口南支水域浅地层剖面调查,所得大量实际资料的介释、分析、研究。指出该地区存在的多种水下地质灾害现象,探讨了它们形成的原因以及对水下工程和航运事业的危害。提供了水下地质灾害现象的实际位置和有关正确数据。     

汉江河谷旬阳段区域滑坡规律及斜坡不稳定性预测

基于斜坡工程地质测绘和实验室分析,文中讨论了研究地段区域滑坡规律。引入信息量及二态变量回归分析建立了斜坡不稳定性两种预测模型。文章重点论证和提出了影响因素筛选、多边形网格单元划分的原则及预测精度评价的原理方法。编制了斜坡不稳定性分区图,检验表明其预测精度高;两预测分区图对比表明有很好的一致性。     

试论上海地质灾害的特点与对策

前言地处长江入口,东海之滨的上海,地势低平、海拨不足4米。第四系覆盖层厚达300米,下伏基岩经多次构造运动,断裂丛生互相切割,错纵复杂。频繁的人类活动,催化了生态环境的恶化。从地表到地下,从陆地到水域,上海隐伏着多种地质灾害。这些地质灾害,又各具特点。为了上海的安全,有必要提出来加以研究,寻找对策,积极防治。并提高到灾害学高度来加以认识。     

用重力压密原理评价大型滑坡滑面强度参数

大型滑坡泥质滑动面强度参数的正确选取，是作好稳定性评价的重要环节。本文从滑坡形成初期时滑带土的结构特征，滑面的应力状态出发，提出了用重力压密原理研究滑带土的物理力学性质，并用实例介绍了研究步骤和评价效果，为大型滑坡动面强度参数评价提出了新的途径。     

特大规模滑坡遥感调查──巧家县城滑坡

目视解译１：６７万彩红外航空象片发现巧家县城斜坡显示为典型的滑坡地形。经实地验证及结合地质资料、航空象片、卫星象片综合解译分析认为：根据斜坡形态、金沙江异常弯道、斜坡上松散物质分布及所处地质环境与降雨条件确定巧家斜坡为－巨型古滑坡，估算体积约１２０×１０８ｍ３，就我们所查阅到的国内外报道中为一最大规模古滑坡，年龄约１０万年。目前，滑坡整体已经稳定，但后壁、侧壁及滑体上发育的大量次生崩塌、滑坡、泥石流还将长期活动。