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土木工程专业外文翻译

土木工程专业外文翻译
土木工程专业外文翻译

DESIGN AND EXECUTION OF GROUND INVESTIGATION FOR

EARTHWORKS

ABSTRACT

The design and execution of ground investigation works for earthwork projects has become increasingly important as the availability of suitable disposal areas becomes limited and costs of importing engineering fill increase. An outline of ground investigation methods which can augment ‘traditional investigation methods’ particularly for glacial till / boulder clay soils is presented. The issue of ‘geotechnical certification’ is raised an d recommendations outlined on its merits for incorporation with ground investigations and earthworks.

1. INTRODUCTION

The investigation and re-use evaluation of many Irish boulder clay soils presents difficulties for both the geotechnical engineer and the road design engineer. These glacial till or boulder clay soils are mainly of low plasticity and have particle sizes ranging from clay to boulders. Most of our boulder clay soils contain varying proportions of sand, gravel, cobbles and boulders in a clay or silt matrix. The amount of fines governs their behaviour and the silt content makes it very weather susceptible.

Moisture contents can be highly variable ranging from as low as 7% for the hard grey black Dublin boulder clay up to 20-25% for Midland, South-West and North-West light grey boulder clay deposits. The ability of boulder clay soils to take-in free water is well established and poor planning of earthworks often amplifies this.

The fine soil constituents are generally sensitive to small increases in moisture content which often lead to loss in strength and render the soils unsuitable for re-use as engineering fill. Many of our boulder clay soils (especially those with intermediate type silts and fine sand matrix) have been rejected at the selection stage, but good planning shows that they can in fact fulfil specification requirements in terms of compaction and strength.

The selection process should aim to maximise the use of locally available soils and with careful evaluation it is possible to use o r incorporate ‘poor or

marginal soils’ within fill areas and embankments. Fill material needs to be placed at a moisture content such that it is neither too wet to be stable and trafficable or too dry to be properly compacted.

High moisture content / low strength boulder clay soils can be suitable for use as fill in low height embankments (i.e. 2 to 2.5m) but not suitable for trafficking by earthwork plant without using a geotextile separator and granular fill capping layer. Hence, it is vital that the earthworks contractor fully understands the handling properties of the soils, as for many projects this is effectively governed by the trafficability of earthmoving equipment.

2. TRADITIONAL GROUND INVESTIGATION METHODS

For road projects, a principal aim of the ground investigation is to classify the suitability of the soils in accordance with Table 6.1 from Series 600 of the NRA Specification for Road Works (SRW), March 2000. The majority of current ground investigations for road works includes a combination of the following to give the required geotechnical data:

?Trial pits

?Cable percussion boreholes

?Dynamic probing

?Rotary core drilling

?In-situ testing (SPT, variable head permeability tests, geophysical etc.) ?Laboratory testing

The importance of ‘phasing’ the fieldwork operations cannot be overstressed, particularly when assessing soil suitability from deep cut areas. Cable percussion boreholes are normally sunk to a desired depth or ‘refusal’ with disturbed and undisturbed samples recovered at 1.00m intervals or change of strata.

In many instances, cable percussion boring is unable to penetrate through very stiff, hard boulder clay soils due to cobble, boulder obstructions. Sample disturbance in boreholes should be prevented and loss of fines is common, invariably this leads to inaccurate classification.

Trial pits are considered more appropriate for recovering appropriate size samples and for observing the proportion of clasts to matrix and sizes of cobbles, boulders. Detailed and accurate field descriptions are therefore vital

for cut areas and trial pits provide an opportunity to examine the soils on a larger scale than boreholes. Trial pits also provide an insight on trench stability and to observe water ingress and its effects.

A suitably experienced geotechnical engineer or engineering geologist should supervise the trial pitting works and recovery of samples. The characteristics of the soils during trial pit excavation should be closely observed as this provides information on soil sensitivity, especially if water from granular zones migrates into the fine matrix material. Very often, the condition of soil on the sides of an excavation provides a more accurate assessment of its in-situ condition.

3. ENGINEERING PERFORMANCE TESTING OF SOILS

Laboratory testing is very much dictated by the proposed end-use for the soils. The engineering parameters set out in Table 6.1 pf the NRA SRW include a combination of the following:

?Moisture content

?Particle size grading

?Plastic Limit

?CBR

?Compaction (relating to optimum MC)

?Remoulded undrained shear strength

A number of key factors should be borne in mind when scheduling laboratory testing:

?Compaction / CBR / MCV tests are carried out on < 20mm size material.

?Moisture content values should relate to < 20mm size material to provide a valid comparison.

?Pore pressures are not taken into account during compaction and may vary considerably between laboratory and field.

?Preparation methods for soil testing must be clearly stipulated and agreed with the designated laboratory.

Great care must be taken when determining moisture content of boulder clay soils. Ideally, the moisture content should be related to the particle size and

have a corresponding grading analysis for direct comparison, although this is not always practical.

In the majority of cases, the MCV when used with compaction data is considered to offer the best method of establishing (and checking) the suitability characteristics of a boulder clay soil. MCV testing during trial pitting is strongly recommended as it provides a rapid assessment of the soil suitability directly after excavation. MCV calibration can then be carried out in the laboratory at various moisture content increments. Sample disturbance can occur during transportation to the laboratory and this can have a significant impact on the resultant MCV’s.

IGSL has found large discrepancies when performing MCV’s in the field on low plasticity boulder clays with those carried out later in the laboratory (2 to 7 days). Many of the aforementioned low plasticity boulder clay soils exhibit time dependant behaviour with significantly different MCV’s recorded at a later date – increased values can be due to the drainage of the material following sampling, transportation and storage while dilatancy and migration of water from granular lenses can lead to deterioration and lower values.

This type of information is important to both the designer and earthworks contractor as it provides an opportunity to understand the properties of the soils when tested as outlined above. It can also illustrate the advantages of pre-draining in some instances. With mixed soils, face excavation may be necessary to accelerate drainage works.

CBR testing of boulder clay soils also needs careful consideration, mainly with the preparation method employed. Design engineers need to be aware of this, as it can have an order of magnitude difference in results. Static compaction of boulder clay soils is advised as compaction with the 2.5 or 4.5kg rammer often leads to high excess pore pressures being generated – hence very low CBR values can result. Also, curing of compacted boulder clay samples is important as this allows excess pore water pressures to dissipate.

4. ENGINEERING CLASSIFICATION OF SOILS

In accordance with the NRA SRW, general cohesive fill is categorised in Table 6.1 as follows:

2A Wet cohesive

?2B Dry cohesive

?2C Stony cohesive

?2D Silty cohesive

The material properties required for acceptability are given and the design engineer then determines the upper and lower bound limits on the basis of the laboratory classification and engineering performance tests. Irish boulder clay soils are predominantly Class 2C.

Clause 612 of the SRW sets out compaction methods. Two procedures are available:

?Method Compaction

?End-Product Compaction

End product compaction is considered more practical, especially when good compaction control data becomes available during the early stages of an earthworks contract. A minimum Target Dry Density (TDD) is considered very useful for the contractor to work with as a means of checking compaction quality. Once the material has been approved and meets the acceptability limits, then in-situ density can be measured, preferably by nuclear gauge or sand replacement tests where the stone content is low.

As placing and compaction of the fill progresses, the in-situ TDD can be checked and non-conforming areas quickly recognised and corrective action taken. This process requires the design engineer to review the field densities with the laboratory compaction plots and evaluate actual with ‘theoretical densities’.

5. SUPPLEMENTARY GROUND INVESTIGATION METHODS FOR EARTHWORKS

The more traditional methods and procedures have been outlined in Section 2. The following are examples of methods which are believed to enhance ground investigation works for road projects:

?Phasing the ground investigation works, particularly the laboratory testing

?Excavation & sampling in deep trial pits

?Large diameter high quality rotary core drilling using air-mist or polymer gel techniques

译文:

土方工程的地基勘察与施工

摘要:

当工程场地的处理面积有限且填方工程费用大量增加时,土方工程的地基勘察设计与施工已逐渐地变得重要。由于冰渍土以及含砾粘土的提出使土方工程地基勘察方法的纲要比传统的勘察方法更详细。本文提出“岩土认证”观点以及对地基勘察与土方工程相结合的优点加以概要说明。

1、引言

许多爱尔兰含砾粘土的勘察与再利用评价使岩土工程师与道路工程师感到为难。这些冰渍土或含砾粘土主要表现为低可塑性而且还含有从粘土到漂石的不同粒径颗粒。大部分本地粘土与淤泥质土中包含不同比例的砂、砾石、卵石、漂石。颗粒级配控制着土体的行为,而且淤泥使土体性质易受天气变化影响。

土体含水量随着地区不同而不同,从都柏林硬灰黑含砾粘土的7%到中部、西南部或西北部浅灰色含砾粘土沉积物的20%-25%。含砾粘土吸附水的能力建立的较好但土方工程中计划的不恰当常导致其扩大。

一般来说,良好级配的土体对于含水量的轻微变大相当敏感,将导致强度下降或不适合用作工程回填土。许多含砾粘土(尤其中等淤泥质土或良好级配的砂)在选择阶段已经被筛除,但事实上它们能对压缩或强度起到特定的作用。

筛选过程应尽量使用本地土体或者回填区或路堤边性质相对较差的土体,通过仔细评价应加以应用。回填材料必须保持一定的含水量,既不能太湿导致土体不稳定也不能太干以致不能被充分压缩。

高含水量、低强度含砾粘土适用于低路堤回填(相当于2到2.5米的高度)但不适用于没有使用土工织布隔离与回填层的土方回填工程。因此,土方工程承包商充分认识土体的处理特性相当重要,因为许多工程都受到挖掘设备通行能力的影响。

2、传统地基勘察方法

对于道路工程来讲,地基勘察最基本目标是对土体适用性进行类似表6.1的分类,该表源于国家档案登记处2000年3月版的道路施工规范。目前大部分道路施工中的地基勘察包含以下提供有关岩土参数的试验方法:

◆取样孔

◆静压法取样

◆动力探测

◆回转钻进

◆原位测试(标准贯入试验,变水头渗透试验,岩土物理试验等)

◆室内试验

评价场地工作的重要性特别是评价土体深部取样区域的适用性时不能过分强调其适用性。静压法取样通常将取样器下沉至要求深度进行取样,并每间隔一米进行取样。

在许多情况下,静压法取样由于卵石、漂石阻碍不能压入非常坚硬的含砾粘土。土样在钻孔内应尽量少扰动,但级配变坏是很正常的,级配变坏将导致土样分类不够精确。

取样孔对于恢复适当尺寸的土样以及观察碎屑岩在卵石、漂石中所占比例来说应该是适当的。因此,详尽且精确的地区描述取样区域以及取样空来说都相当重要,而且还为它们提供了检查土体在钻孔范围以外性质的良机。取样孔也提供了孔壁稳定性的评价以及观察孔壁内水进入时所造成的影响。

一位有经验的岩土工程师或工程地质专家应监督取样孔工作以及土样的恢复。因为土样性质为土样敏感性提供了信息,所以取样时土体性质应被密切关注,尤其是水从小颗粒区域迁移到良好级配区域。而且土体在开挖时的条件为其原位条件提供了一个相对精确的评价。

3、土工试验

由于室内试验的许多规定使其被建议用作土的最后试验。土的工程参数列于表6.1,该表源于国家档案登记处2000年3月版的道路施工规范。其中包含以下内容:

◆含水量

◆颗粒级配

◆塑限

◆加州承载比

◆密实度(最优含水量)

◆重塑土不排水抗剪强度

当进行室内试验时,大量的关键因素应该被考虑。

◆密实度.加州承载比.MCV试验土样小于20mm。

◆含水量测试试样应小于20mm以提供真实有效的对比。

◆压缩时孔隙压力未加以考虑可能导致室内与实际存在相当大的差异。

◆土样测试的准备方法必须被明确规定,而且试验应在指定试验室进行。

进行含砾粘土的含水量测试时必须非常小心谨慎。理想地说,土的含水量应与其粒径有关,而且还有相应的级配分析曲线,虽然该曲线不是具有实际应用价值。

在大部分情况下,含水量被应用于密实度被认为是提供了关于建立含砾粘土适用性特征的最好方法。由于含水量能在开挖后快速评价土体的适用性,故强烈建议在取样孔中对其进行测试。因此,含水量刻度能够在实验室内不同含水量增量情况下被采用。土样扰动常发生在搬运过程中,这将对含水量的结果产生重大的影响。

地质科学研究所在进行低可塑性含砾粘土含水量测定时已经土样含水量由于时间的推移(2到7天)存在巨大的差异。许多上述低可塑性含砾粘土表现出与时间相关的含水量变化特性。其变化值主要由于土样取样时的排水条件,土样运移以及其体积的膨胀与土中水的迁移将导致土样破坏或者强度下降。

以上资料对于设计者以及土方工程承包商来说都很重要,因为进行上述规定的测试时它提供了设计者以及土方工程承包商理解土体特性的机会。它能说明在某些情况下先进行排水的所存在的优点。对于混合土来说,对土方工程进行开挖时加快排水工程非常有必要。

含砾粘土的加州承载比测试也需要非常小心谨慎,尤其是开展测试前所采用的准备工作。设计工程师必须意识到这一点,因为准备工作的误差将导致试验结果的明显不同。经验表明,采用2.5或4公斤的锤进行含砾粘土的静态击实将导致超高的孔隙压力,因此将导致加州承载比值变低。被击实含砾粘土的硬化相当重要,因为土的硬化将使孔隙水压力消散。

4、土的工程分类

依照英国标准道路施工规范,一般的粘性填土分类如表6.1如下所示:

◆ 2A湿粘性填土

◆ 2B干粘性填土

◆ 2C含石粘性填土

◆ 2D粉质粘性填土

首先按可接受性进行提供土样特性,然后设计工程师在实验室分类以及工程性质测试基础进行决定土工程分类的上下限。爱尔兰含砾粘土基本上都属于2C含石粘性填土。

道路施工规范612条列出了击实方法。两种现有的规程:

◆原状土样击实

◆重塑土样击实

重塑土样击实被认为最实用,特别是在土方工程合同初期阶段良好的击实控制数据可被利用。检验击实质量时,最小干密度对于合同承包商来说是最有

用的。一旦土样被认可或满足工程分类要求,然后原位密度才能进行测定,当土样中含石量较低时,通常采用核子测定仪或换砂试验进行测定。

当布置或击实回填土时,原位干密度能够得到检验,不够密实的地方能够被快速识别并进行击实。该过程要求设计工程师评价击实试验区域的总体密度并估计现场真实的“理论密度”。

5、土工地基勘察方法的补充

传统的勘察方法与规程已在第二部分进行详细介绍。接下来讲述的是有助于道路工程的地基勘察工作方法的几个例子:

◆地基勘察工作分阶段进行,特别是室内测试

◆开挖&深取样孔取样

◆使用喷气或聚合物胶质体技术的大直径高质量回转钻进

外文文献翻译中性化服装设计

外文文献原文+译文 原文 The study on the design of neuter clothing H ous e W Abstract Social and economic development, social thought, opening up and the progress of science and technology, men and women style presented the diversified pattern of neuter the fuzzy gender differences in style, from the beginning of non-mainstream des ign till n ow has develop ed i nt o on e of the mains t ream fas hi on d es ign style. Fashion brands have launched in recent years, the neutral flavor of fashion, neuter clothing market share of more and more, neutral fashion, with its broad group of sex leads the urban street fashion. Neutralization of free and open way of life style, gave people a comfortable and enjoyable. K ey words: Neut e r; Cl ot hing; Gender roles; Design 1 Introduction The beginning of the 20th century the rise of the feminist movement, make the neutral clothing as a kind of style into the line of sight of people. In the 90 s, the neutral clothing has used by each big brand clothing as one of the fashionable e lement s, s uc h a s dust coa t w i th a ne ut ral style, s ui ts, t-shirt s and j e ans have bec om e people like everyday clothes. Neuter clothing style is a simple, pure; reject all multifarious mincing, personalized style. As a special kind of clothing style, neuter clothing fashion has been intensified in the social life, so it is necessary for us to study the clothing neutralization phenomenon, to study its causes and the development of sociology. This article mainly from the sociological association as well as the relationship between men and women clothing and gender status in the society, which is based on analyzing the change of the study the social basis of the neutral clothing appear; Again from the social system, economic development, cultural trend and fashion designers to the influence of the neutral clothing style, etc., it is concluded that the neuter clothing phenomenon is the development of social consciousness, the sexual role transformation, the new clothing design trends are affecting the results.

土木工程类专业英文文献及翻译

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服装设计与高科技外文翻译文献

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文献综述和外文翻译撰写要求与格式规范

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外文资料名称: Design and performance evaluation of vacuum cleaners using cyclone technology 外文资料出处:Korean J. Chem. Eng., 23(6), (用外文写) 925-930 (2006) 附件: 1.外文资料翻译译文 2.外文原文

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【参考文献翻译】服装设计中独特性的表达.doc

英文翻译: The unique expression in fashion design Abstract: With the social progress and people's aesthetic awareness, clothing design requirements are constantly changing, not only beautiful, comfortable, personalized for different purposes, and more and more people started to pay attention the unique design of the clothing. unique expression of the clothing design has something in common, in common, there are three factors most typical one of the means of the use of the plastic arts; is to follow the basic rules of the plastic arts; the pursuit of art content and beauty of form harmony and unity. The face of increasingly fierce competition in society, from clothing unique starting to play to their strengths, so that the costume design perfected. Key words: aesthetic sense; costume design; uniqueness; expression Introduction With the rich substance of social development, improved quality of life, the pursuit of unique clothing is also more than plus strong, the face of the popularity and unity to the mass production of clothing has become a problem to be solved in order to fashion designers. An important design point, then become a unique expression of the costume design costume design costume design unique refers to the characteristics of the presentation of the representative from the clothing on the whole, it is unique content and form unity. China fashion design unique expression as a complete system of disciplines to study the ancient times to now there, but the uniqueness of expression in fashion design is not perfect, therefore, the uniqueness of this study fashion design to express Modern fashion design is of great significance. 1. The unique overview of clothing In short, The unique nature of the clothing is the clothing unique. In a broad sense refers to the presentation of the representative characteristics from the whole of the clothing works, it is one of the unique form and the objectivity of the unity of the unity of content, costume designer on the subjective aspect of creative and clothing subject matter difficult to find words to express, but it is not difficult to make us feel unique style. The unique nature of the clothing, but also refers to the values, artistic characteristics and inherent character of a nation, an era, a genre or a person's clothing in the content and format of the show out. The unique nature of the appearance of the mind, the pursuit of the realm of fashion design in the final analysis is unique in design and positioning, the unique expression of the costume design also reflects the designer's unique creative thinking and the pursuit of art also reflects the distinctive character.

土木工程专业外文文献及翻译

( 二 〇 一 二 年 六 月 外文文献及翻译 题 目: About Buiding on the Structure Design 学生姓名: 学 院:土木工程学院 系 别:建筑工程系 专 业:土木工程(建筑工程方向) 班 级:土木08-4班 指导教师:

英文原文: Building construction concrete crack of prevention and processing Abstract The crack problem of concrete is a widespread existence but again difficult in solve of engineering actual problem, this text carried on a study analysis to a little bit familiar crack problem in the concrete engineering, and aim at concrete the circumstance put forward some prevention, processing measure. Keyword:Concrete crack prevention processing Foreword Concrete's ising 1 kind is anticipate by the freestone bone, cement, water and other mixture but formation of the in addition material of quality brittleness not and all material.Because the concrete construction transform with oneself, control etc. a series problem, harden model of in the concrete existence numerous tiny hole, spirit cave and tiny crack, is exactly because these beginning start blemish of existence just make the concrete present one some not and all the characteristic of quality.The tiny crack is a kind of harmless crack and accept concrete heavy, defend Shen and a little bit other use function not a creation to endanger.But after the concrete be subjected to lotus carry, difference in temperature etc. function, tiny crack would continuously of expand with connect, end formation we can see without the

服装设计褶皱拼缝外文文献

Vol. 3 (3), April, 2009 ISSN 1994-9057 (Print) ISSN 2070-0083 (Online) Effect of Seams on Drape of Fabrics (Pp. 62-72) Sukumar Nachiappan- Lecturer, Textile Engineering Department, Faculty of Engineering, Bahir Dar University, Bahir Dar, Ethiopia. Email: sugumaraan@https://www.wendangku.net/doc/6d11797048.html, Gnanavel. P. - Lecturer, KSR College of Technology, Tiruchengode–637 215, TamilNadu, India Ananthakrishnan, T.- Professor and Head, Department of Textile Technology, Government Sri Krishna Rajendra silver jubilee Technical Institute, Bangalore – 560 001, India Abstract Drape of the fabric is its ability to hang freely in graceful folds when some area of it is supported over a surface and the rest is unsupported. Drape is a unique property that allows a fabric to be bent in more than in one direction, When two-dimensional fabric are converted to three-dimensional garment form. In the present study, the effects of sewing of different seam were selected on different fabric and their behaviors were studied. In this study drape of ten fabrics are analyzed with three types of seams and three stitch densities. Sample without seam is a control sample and drape of seamed samples are compared with control sample to analyse the drape behavior of seamed fabrics. This paper presents a fundamental drape analysis of seamed fabrics using drape meter. Drape behavior is determined in terms of drape coefficient. The effect of seams on the drape coefficient and Drape profile has been made. Drape coefficients significantly differs between the fabrics and also between the seam stitch density combinations. Investigating drape on seamed fabrics can improve fabric end use application.

本科毕业设计(论文)外文翻译基本规范

本科毕业设计(论文)外文翻译基本规范 一、要求 1、与毕业论文分开单独成文。 2、两篇文献。 二、基本格式 1、文献应以英、美等国家公开发表的文献为主(Journals from English speaking countries)。 2、毕业论文翻译是相对独立的,其中应该包括题目、作者(可以不翻译)、译文的出处(杂志的名称)(5号宋体、写在文稿左上角)、关键词、摘要、前言、正文、总结等几个部分。 3、文献翻译的字体、字号、序号等应与毕业论文格式要求完全一致。 4、文中所有的图表、致谢及参考文献均可以略去,但在文献翻译的末页标注:图表、致谢及参考文献已略去(见原文)。(空一行,字体同正文) 5、原文中出现的专用名词及人名、地名、参考文献可不翻译,并同原文一样在正文中标明出处。 二、毕业论文(设计)外文翻译 (一)毕业论文(设计)外文翻译的内容要求 外文翻译内容必须与所选课题相关,外文原文不少于6000个印刷符号。译文末尾要用外文注明外文原文出处。 原文出处:期刊类文献书写方法:[序号]作者(不超过3人,多者用等或et al表示).题(篇)名[J].刊名(版本),出版年,卷次(期次):起止页次. 原文出处:图书类文献书写方法:[序号]作者.书名[M].版本.出版地:出版者,出版年.起止页次. 原文出处:论文集类文献书写方法:[序号]作者.篇名[A].编著者.论文集名[C]. 出版地:出版者,出版年.起止页次。 要求有外文原文复印件。 (二)毕业论文(设计)外文翻译的撰写与装订的格式规范 第一部分:封面

1.封面格式:见“毕业论文(设计)外文翻译封面”。普通A4纸打印即可。 第二部分:外文翻译主题 1.标题 一级标题,三号字,宋体,顶格,加粗 二级标题,四号字,宋体,顶格,加粗 三级标题,小四号字,宋体,顶格,加粗 2.正文 小四号字,宋体。 第三部分:版面要求 论文开本大小:210mm×297mm(A4纸) 版芯要求:左边距:25mm,右边距:25mm,上边距:30mm,下边距:25mm,页眉边距:23mm,页脚边 距:18mm 字符间距:标准 行距:1.25倍 页眉页角:页眉的奇数页书写—浙江师范大学学士学位论文外文翻译。页眉的偶数页书写—外文翻译 题目。在每页底部居中加页码。(宋体、五号、居中) 装订顺序是:封皮、中文翻译、英文原文复印件。

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