Book–Electrokinetics in Geotechnical and Environmental Engineering

Eclitors:
Yan-Feng Zhuang (Wuhan University, China)
Rafig Azzam (RWTH AACHEN,Germany)
Herbert Klapperich (TU Bergakademie Freiberg,Germany)

Electrokinetics in Geotechnical and Environmental Engineering

Preface

Idea of publishing this book was originated during Professor Yan-feng Zhuang’s visiting TU Freiberg in 2013. Originally, this book was to focus on electro-osmotic consolidation only; after communicating with Professor Herbert Klapperich and Professor Rafig Azzam, more content was added in.

Electrokinetic phenomena of soil have been discovered for over 200 years. The electro-kinetic phenomena include streaming potential, migration potential, electro-osmosis, ion migration and electrophoresis. These phenomena show great potential in geotechnical and environmental engineering. Lots of interesting researches have been going on in this multidisciplinary area and results are very promising both practically and theoretically. This book is to introduce some of them.

Novel theoretical model for electro-osmotic consolidation, namely energy analysis model, is presented in Chapter 2 and 3. Novel corrosion-proof electrode for electro-osmotic consolidation, namely electro-kinetic geosynthetics (EKG), is presented in Chapter 4, together with a showcase of its field application. Chapter 6 presents a wide range of potential application of electrokinetics, including dewatering, soil improvement, contaminated soil remediation, contaminate barrier, waste water treatment, etc. Another showcase of field application of electro-kinetics, which is ground stabilization using electro-chemical injection, is presented in Chapter 7. Chapter 8 presents studies on electro-osmosis reducing pull out resistance of sheet pile. Chapter 9 presents studies on thermos-osmosis induced by electric current generated heat during electro-osmosis.

We hope that this book will be inspiring to people who are interested in electro-kinetic phenomena of soil. More interesting work will be carried out in this research field and promising results will be applied in geotechnical and environmental engineering.

The Editors

Acknowledgements

This work was partly supported by DAAD and National Natural Science Foundation of China (NSFC Grant No. 51109168 and No. 41472039). Thanks for this support and thanks to the authors contributed to this book, they are named in their corresponding chapters.


链接

Electrokinetics in Geotechnical and Environmental Engineering

看不见的城市

作者:王馨仪

(内容节选,报告全文内容链接附后)

从看不见的部分来看,为了修公路、修铁路拆掉的一座桥,可能是一座城市市民的情感依托;为了管制交通而取缔的流动摊贩,恰恰是城市民俗的重要组成部分,一条老街,拆了重新建一条仿古的街道,带动了商业发展,而那些关于街头巷尾的记忆则消失殆尽。我们破坏、修复的往往是表面的东西,而看不见的部分被破坏了,是没法修复的,甚至人们都不会意识到。

当我们看到这样一句话: “ 在长沙, 街上再难看到推着小车买白玉兰花的奶奶了”,而我们还在“饿了么”上面点着外卖,没有意识到,传统的文化社区正在走向消失,饮食文化带来的社会功能随着其消失而一去不返。我们以为发达的物流,这类外卖app为我们提供了更多数据,更多方便,会使大家越来越交融,而相反的是,大家越来越分离,越来越走向孤独的个体,没有一个依靠的社区邻里,没有熟悉的餐馆摊贩,有的只有自己的一间公寓和一桌外卖。

此外,我们应当意识到,传统的社区、传统的文化承载着我们的记忆,但是随着交通的发达,我们迎来了一个空间碎片化的时代。以前,北京和广州,相隔千里,绝对是两种文化的载体,而高铁使这两个地区沟通的越来越多,飞机使中国和国外的沟通越来越多,从微观层面来说,城市的不同区域随着汽车的兴起而交往越加频繁。一一这意味着,我们可以身处的一切空间,都在随着交通运输的兴起而走向碎片化。这样的结果是什么呢?是世界上的大都市都只是纽约的翻版。城市面临着一个千篇一律的问题, 正如卡尔维诺在《看不见的城市》中提到的:“人在旅行时会发现城市差异正在消失, 每座城市都与其他城市相像。”我们的空间不仅在走向分裂,而且在失去辨识度一一因为我们不再保持有完整的文化核心区,文化的核心不是世博会的几栋建筑,而是活的街道,包括街坊邻里、商户工人和生生不息的传统文化资源。

在我所关注的情感地理学领域中,地理不再只是一个坐标,人的情感往往和地理相联系,我们在加强城市间的、城市内部的交通联系的同时,不能忘记,不同的区域也有属于它的情感,不同的人对不同的区域有不同的偏好,这样的情感联系像卡尔维诺所说,与记忆有关,与文化属性有关,与传承有关。所以城市规划仅让规划师参与是不够的,仅仅以经济发展和区域联系为导向也是不够的,应该让大众参与,重视民众的声音。

链接

看不见的城市

黑白子的故事

这是个云淡风清的故事,故事还没有开头就已经煞了尾,但是那点点滴滴的心情始终值得怀念。转瞬即逝的青春岁月中,我们总有些说过的和没有说出的话;发生了的和没来得及发生的故事。所幸的是我们都在成长。每段经历都像是一个驿站,迈过了一个驿站,我们就又长大了一点点:-)
这是一个关于黑白子的故事,关于社团的故事,关于青春校园的故事
——“如果你是黑子,那我就是白子”,无论离开了谁都不是一副完整的围棋。
但是黑子白子要么在各自的盒子里沉默,要么在同一个棋盘上争斗;注定了缠缠绕绕,却没缘分在一起。
一语成谶!

链接:

黑白子的故事

还是

还是改回posts格式了。开始要准备慢慢添加一些东西了。正式开始网站建设。
本来觉得pdf蛮好,可是发现插件竟然有广告,而且有时候会找不到路径,不知道什么问题,于是想法又有些改变,看看吧,是不是都存在自己服务器上,还是托管到别的地方。自建服务器,自由度很大,但是安全性完全没考虑,路径完全是明文的,这一点很不好。
想想吧,也慢慢再试试。