前言
很榮幸被Taylor & Francis公司邀請(qǐng)來編寫這本備受歡迎教材的第8版。在接受這項(xiàng)任務(wù)前，我從未意識(shí)到，要達(dá)到前七版的高水準(zhǔn)需要耗費(fèi)我如此多的精力和時(shí)間。本書初版于1974年發(fā)行，我個(gè)人認(rèn)為在本書誕生40年這個(gè)時(shí)間節(jié)點(diǎn)，對(duì)其做一次重大更新是恰當(dāng)?shù)�。�?dāng)然，在進(jìn)行大幅度修訂的同時(shí)，我也盡力去維持本書最核心的特征——清晰且富有深度的說明。

我們對(duì)所有的原章節(jié)都進(jìn)行了更新，并擴(kuò)充了部分章節(jié)的內(nèi)容，同時(shí)增加了一些新的章節(jié)，以滿足當(dāng)下工程和課程的需要。但本書的主要作用沒有發(fā)生變化，依舊是滿足土木工程專業(yè)本科生的需求，作為學(xué)生從課堂向工程實(shí)際轉(zhuǎn)變過程中的重要參照。本書中的部分高階主題內(nèi)容擴(kuò)展了本書的適用范圍，使其能夠?yàn)橐恍┭芯可�課程提供參考。

主要變化如下：

將素材分為兩個(gè)主要部分：第一部分主要涉及土力學(xué)中的基本概念與理論，第二部分著力于巖土工程設(shè)計(jì)中所必需力學(xué)性質(zhì)的確定。

關(guān)于原位測(cè)試的新章節(jié):著力于由各個(gè)試驗(yàn)可靠地確定參數(shù)，以及通過實(shí)際測(cè)點(diǎn)的數(shù)據(jù)得出對(duì)力學(xué)性能的解讀。

關(guān)于基礎(chǔ)特性及設(shè)計(jì)的新章節(jié)：有關(guān)基礎(chǔ)的內(nèi)容現(xiàn)在分為3章（淺基礎(chǔ)、深基礎(chǔ)和高階課題），這樣有利于更靈活的課程設(shè)計(jì)。

極限狀態(tài)設(shè)計(jì)（對(duì)應(yīng)于歐洲規(guī)范7）： 有關(guān)于巖土工程設(shè)計(jì)部分的章節(jié)均基于通用的極限狀態(tài)設(shè)計(jì)理論體系（取代了原有的容許應(yīng)力法）。更進(jìn)一步的背景材料可參見歐洲規(guī)范7。為了更好地使學(xué)生完成由大學(xué)到設(shè)計(jì)單位的轉(zhuǎn)變，這一規(guī)范應(yīng)用于本書的數(shù)值示例及章末習(xí)題。

補(bǔ)充案例學(xué)習(xí)：采用了以往版本的案例，但新版中包含了極限狀態(tài)設(shè)計(jì)理論應(yīng)用于實(shí)際工程問題這一過程，以培養(yǎng)學(xué)生的工程判斷力。

包含了極限狀態(tài)分析方法：隨著基于這些方法的高端計(jì)算軟件的應(yīng)用越來越廣泛，為了學(xué)生日后的職業(yè)生涯，我認(rèn)為他們有必要在離開大學(xué)時(shí)對(duì)于這些方法有基本的了解。同時(shí)我們也為承載力系數(shù)和極限壓力提供了更詳細(xì)的背景材料，這在以往的版本中是沒有的。


我要對(duì)鄧迪大學(xué)的同事表示無比的感激，是他們給予了我完成這一版的時(shí)間，同時(shí)他們也在成書的過程中給予了我許多建設(shè)性的建議。我同樣也要感謝Taylor & Francis公司的所有成員，有了他們的幫助我才能夠完成這一令人生畏的任務(wù)。最后，感謝那些允許我使用他們的圖標(biāo)、數(shù)據(jù)和圖像的人。


之前的土木工程師認(rèn)為本書以往的版本是實(shí)用的，信息豐富和給人以啟發(fā)。我衷心希望我主編的這一版本也能得到現(xiàn)在的及未來的土木工程同行同樣的評(píng)價(jià)。


J�盇�奔{珀特
鄧迪大學(xué)
2011年7月



Preface
Preface


Preface


When I was approached by Taylor & Francis to write the new edition of Craig�搒 popular textbook, while I was honoured to be asked, I never realised how much time and effort would be required to meet the high standards set by the previous seven editions�盜nitially published in 1974, I felt that the time was right for a major update as the book approaches its fortieth year, though I have tried to maintain the clarity and depth of explanation which has been a core feature of previous editions��

All chapters have been updated, several extended, and new chapters added to reflect the demands of today�搒 engineering students and courses�盜t is still intended primarily to serve the needs of the undergraduate civil engineering student and act as a useful reference through the transition into engineering practice�盚owever, inclusion of some more advanced topics extends the scope of the book, making it suitable to also accompany many post�瞘raduate level courses��

The key changes are as follows:

Separation of the material into two major sections: the first deals with basic concepts and theories in soil mechanics, and the determination of the mechanical properties necessary for geotechnical design, which forms the second part of the book��

New chapter on in�瞫itu testing: focusing on the parameters that can be reliably determined using each test and interpretation of mechanical properties from digital data based on real sites��

New chapters on foundation behaviour and design: coverage of foundations is now split into three separate sections (shallow foundations, deep foundations and advanced topics), for increased flexibility in course design��

Limit state design (to Eurocode 7): The chapters on geotechnical design are discussed wholly within a modern generic limit state design framework, rather than the out�瞕ated permissible stress approach�盡ore extensive background is provided on Eurocode 7, which is used in the numerical examples and end�瞣f�瞔hapter