湖北省咸丰县污水处理厂不稳定斜坡崩滑分析与防治

湖北省咸丰县污水处理厂不稳定斜坡是污水处理厂在修建过程中平场开挖后形成的,该斜坡已两次产生变形,对其下方厂区公路、厂房构成威胁,严重影响污水厂正常运营。文章在对该不稳定斜坡的基本特征分析的基础上,详述其崩滑成因,并对其发展趋势做出预测,最终提出相应的防治措施。     

不稳定斜坡的勘察要点及边坡防治分析

以中华村不稳定斜坡勘察为例,介绍了不稳定斜坡勘察中的有关要点,对场地的地质环境条件进行描述,提出相关岩土层物理力学指标建议值,对边坡的稳定性进行计算与评价,对边坡防治方案提出建议,以期对类似工程勘察及边坡防治提供参考。     

兰州建成地灾应急指挥平台

近日,甘肃省兰州市地质灾害信息系统及应急指挥平台建设项目通过有关专家组评审验收。专家组认为,该项目实用性和可操作性强,为兰州市地质灾害防治提供了有效的管理平台。专家认为,在已有的滑坡、崩塌、不稳定斜坡、泥石流、地面塌陷等地灾调查数据的基础上,     

G320改建公路地质灾害发育特征及防治建议——以保山至蒲缥段为例

通过对国道G320线(保山-蒲缥)段改建公路沿线现状地质灾害调查,发现因受地形、地貌、构造、岩性、降雨、人类活动等因素的影响,查明改建公路滑坡、崩塌、不稳定斜坡等地质灾害较为发育。本文根据发育特征及灾害成因提出防治建议。     

植被对斜坡稳定性的积极作用和局限性

植物根系在表土层形成了根-复合体,能够增强斜坡土体的抗剪强度,从而起到维持边坡稳定的作用。但根系主要分布在1米土层范围内,大部分植被根系并不能延伸到潜在滑动面以下,对维持斜坡稳定性的积极贡献是有限的。且在同等降雨条件下,植被发育斜坡的抗剪强度可能比裸坡的小,这说明植被护坡具有局限性。植被发育斜坡有更加丰富的优先流通道——大孔隙,它对滑坡孕育有一定的作用。     

涪陵区地质灾害防治工作

涪陵区境内的长江、乌江及小溪河、梨香溪、磨溪、渠溪河岸线长200余公里，水系发达，坡陡谷深，软弱层及软弱结构发育，地质灾害发生频繁。地质灾害主要有滑坡、崩塌、泥石流、潜在不稳定斜坡及地面塌陷等。据调查，全区有地质灾害隐患811处（其中三峡库区396处）。     

关于《工程地质》课程教改的探讨

《工程地质》是土木工程专业的主要专业基础课。本课程主要讲述地质作用、矿物岩石、地质构造、地下水、土的工程性质、岩石的工程性质、岩体稳定性及各种工程地质问题(如区域稳定、斜坡稳定、围岩稳定、地基稳定、渗透稳定、岩溶、泥石流及地应力等)的分析方法与防治措施。     

快速掘进技术在大断面斜坡道的应用

新立辅助斜坡道是山东黄金集团三山岛金矿井下扩大生产能力的关键性工程,主要为新立西部采场无轨化作业提供设备保障,对新立西部采场生产能力的提高起到推动作用。加快新立辅助斜坡的进度,实现大型无轨设备进采场,对矿山的稳定发展有着举足轻重的作用。     

山区斜坡湿软地基路基稳定性分析方法研究

本文主要针对山区斜坡湿软地基地区的公路路基稳定性问题进行机理分析方法的研究，首先确定机理分析方法——有限元法，以强度折减法为稳定性判定方法，通过稳定系数的数值计算，并与解析法的计算结果进行对比分析，验证所建山区斜坡湿软地基路基数值分析模型的正确性与精确性。     

走楼梯的启示

在楼梯上上上下下已经几十年了,一直是一级一级地走上又一级一级地走下,没有什么不同的感觉。忽而心血来潮,不走楼梯,像小孩子一样走楼梯边上的用来推车的斜坡。走着走着,原来是另一种感觉。走斜坡比走楼梯难。上坡的时候,脚跟用力、脚尖抬起,同时身体向前倾斜;下坡的时候,脚尖用力、脚跟上抬,身体向后倾斜。此外,走斜坡需要全神贯注,否则会摔跤。而走楼梯则不会有这种要求,无论上坡还是下坡,你甚至可以聊天。走斜坡比走楼梯自由。走楼梯永远只能走台阶的倍数,多走或少走都不可能,台阶的高度永远都是做楼梯的人规定的。而走斜坡则有选择的自…     

Workfare,welfare, agency,and well-being

Workfare programs are state-instituted programs that require able-bodied persons with children of school age who wish to claim welfare payments to participate in job training programs, and, eventually, to enter the work force. The philosophy of workfare is based on the value of work and the goal of self-determination. However, as a mandatory program for welfare recipients, workfare requires of those recipients certain duties which, according to those who challenge workfare, interfere with the freedom to choose what one will do with one's life. Whether some form of workfare will be adopted as part of our national welfare system remains to be seen. What the debate about such a program suggests is that welfare, in itself, by ignoring the necessity of security and education for full human agency, neither satisfies basic needs nor prepares its recipients for any life other than that of dependency. With all its difficulties workfare nevertheless presents an alternative to welfare that, at least in theory, more closely identifies its purpose with the values of our society.     

Externalities, Indivisibility, Nonreplicability, and Agglomeration

In this paper we argue that the impact of external scale economies and diseconomies on city size is not nearly as clear-cut as it is tacitly believed in urban economics. Similarly, city-size distortions are not caused by externalities alone. Indivisibility and nonreplicability, which prevent establishing the “right” number of cities, may represent a source for city-size distortions which can be stronger than the standard resource misallocation resulting from external scale economies and diseconomies. It follows that a direct population dispersion policy is not just an inferior substitute to Pigouvian taxes and subsidies but rather a useful complement.     

Mean, median, mode

Summary This note is an attempt to avoid doing the same search for the third time. It happened twice in my life that I wished to prove that the median is located between mean and mode for certain B -distributions: first in 1953, next in 1976. For arbitrary distributions the result is sometimes referred to as F echner's theorem. Of course it does not hold in general. In order to prove the result for particular distributions one can often use an elegant theorem of T imerding . There is a nice relationship with the standardized third central moment.