共查询到20条相似文献，搜索用时 281 毫秒
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侯新宇 《江苏广播电视大学学报》2003,14(6):41-43
CFG桩复合地基具有变形模量高、承载力提高幅度大等特点，设计时可以通过改变桩体材料配比，改变桩体直径、桩长、桩距、垫层厚度等设计参数，使承载力提高以达到设计要求。其中，褥垫层有协调桩和桩间土变形的能力，使得桩和桩间土始终参与工作，一般工程中取10～30cm较为合理。 相似文献
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小直径石灰桩在软弱地基处理中的设计与应用 总被引：3，自引：0，他引：3
小直径石灰桩是加固处理软弱地基较为经济可行的方法之一，本对小直径石灰桩的应用范围，加固机理，设计方法，施工方法等作一介绍。 相似文献
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预应力管桩基础工程的设计质量监理 总被引：1，自引：0，他引：1
预应力管桩基础工程设计质量监理应当重视设计阶段监理，强调设计与施工场地的具体情况相结合。管桩设计质量监理的六个主要环节，即：优化设计方案、确定单桩承载力、设计布桩、选择桩锤、确定“收锤标准”、根据工程地质条件选择合理的管桩施工方法。文章提出了管桩基础的应用范围，对预应力管桩基础的推广、设计和监理等工作都有较高的参考价值。 相似文献
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陆志勇 《泰州职业技术学院学报》2002,2(4):9-12
振动沉管桩因其在施工中明显的优势而被广泛采用，但实际操作中常出现沉桩达不到设计标高现象，而不得不改变施工工艺、更换设备或变更设计，从而延误工期，增加投资等情况。本文通过对振动沉桩的贯入机理、贯入阻力的估算、取值方法、阻力判定及实例分析，让设计、施工人员在设计、施工沉管桩时能合理地确定施工方法、进度、质量。 相似文献
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某桥墩桩基偏位分析与纠偏实施效果 总被引：3，自引：0，他引：3
裴碧峰 《福建工程学院学报》2005,3(4):385-388
根据桥墩桩基施工现场的具体情况，通过理论计算，分析了两基桩产生偏位的主要原因。采用卸载止推、反向堆载、挖坑卸荷、强力牵拉等综合纠偏方法对产生偏位的两基桩实施纠偏，经过一个多月的缓慢纠偏使两桩基基本恢复原位，纠偏后经桩身低应变动测（反射波法）检测其桩身完整满足设计要求。 相似文献
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蔡建新 《广东广播电视大学学报》2001,10(1):84-86
通过对打入式预制桩的事故原因的分析，得出桩尖未达到持力层即桩吊脚是造成单桩承载力大部分达不到设计要求的主要原因。经过分析比较，建议采用静压沉桩方法对工程桩进行复压处理，静载试验检测结果表明，所有复压桩均达到设计承载力。实践证明，静压沉桩处理此类打入式预制桩的吊脚问题是适宜的。 相似文献
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陈弘 《金陵职业大学学报》2000,15(3):35-36
该通过对嵌岩桩与非嵌岩桩承载性状分析，提出在上覆土层较厚、强度较高的情况下，桩并不一定要设计成嵌岩桩。大直径钻孔桩设计综合考虑桩的长径比，上覆土层性质，基岩性质和成桩工艺。 相似文献
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胜利浅海小型采油平台和栈桥平台多采用独立桩支撑，由于受到风、海流、波浪及海冰的联合作用，平台的水平位移成为设计时必须重点考虑的因素。对独立桩的晃动研究是在P—y曲线法的基础上，应用有限元分析软件ANSYS，把桩周土体简化为作用在桩单元上的水平向非线性弹簧单元，模拟独立桩在水平荷载作用下的受力和变形，通过模型桩试验验证此方法的合理性和准确性．为研究海洋独立桩结构提供了一种计算方法。 相似文献
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本文从生石灰桩的几个作用阐述了用生石灰桩加固地基的原理，并提出了相应的设计方法，通过工程实例又进一步说明了设计步骤及施工过程。 相似文献
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邱崇丙 《唐山师范学院学报》2014,(1):21-23
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。 相似文献
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《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
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Rachel Zupek 《海外英语》2007,(11):40-41
我们绝大部分人都同意一件事情——我们喜欢金钱。但是你对金钱的喜欢之情足够到让你创立一份事业么?.财富通常被人忽视,主要在于人们不能真正了 相似文献
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YANGShiguo 《重庆大学学报(英文版)》2004,3(1):86-88
The problem on the geometrc inequalities involving an n-dimensional simplex and its inscribed simplex is studied. Aninequality is established, which reveals that the difference between the squared circumradius of the n-dimensional simplex andthe squared distance between its circumcenter and barycenter times the squared circumradius of its inscribed simplex is not lessthan the 2(n-1)th power of n times its squared inradius, and is equal to when the simplex is regular and its inscribed siplex is atangent point one. Deduction from this inequality reaches a generalization of n-dimensional Euler inequality indicating that thecircumradius of the simplex is not less than the n-fold inradius. Another inequality is derived to present the relationship betweenthe circumradius of the n-dimensional simplex and the circumradius and inradius of its pedal simplex. 相似文献
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《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献
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Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject. 相似文献
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GUO Bao-feng Xiao Da-wei 《重庆大学学报(英文版)》2005,4(3):129-133
Using virtual reality for interactive design gives a designer an intuitive vision of a design and allows the designer to achieve a viable, optimal solution in a timely manner. The article discusses the process of making the Virtual Reality System of the Humble Administrator＇s Garden. Translating building data to the Virtual Reality Modeling Language （VRML） is by far unsatisfactory. This creates a challenge for computer designers to do optimization to meet requirements. Five different approaches to optimize models have been presented in this paper. The other methods are to optimize VRML and to reduce the file size. This is done by keeping polygon counts to a minimum and by applying such techniques as object culling and level-ofdetail switching. 相似文献