Intact soft clay’s critical response to dynamic stress paths on different combinations of principal stress orientation

Comprehensive tests on Hangzhou intact soft clay were performed, which were used to obtain the soils’ critical response to undrained dynamic stress paths under different combinations of principal stress orientation. The different combinations included cyclic principal stress rotation (CPSR for short), cyclic shear with abrupt change of principal stress orientation (CAPSO for short) and cyclic shear with fixed principal stress orientation (CFPSO for short). On one side, under all these stress paths, samples have obvious strain inflection points and shear bands, and the excess pore water pressure is far from the level of initial effective confining pressure at failure. Stress paths of major principal stress orientation (α) alternating from negative and positive have quite different influence on soil’s properties with those in which α is kept negative or positive. On the other side, due to the soil’s strongly initial anisotropy, samples under double-amplitudes CPSR and CAPSO (or single-amplitude CPSR and CFPSO) have similar properties on dynamic shear strength and pore water pressure development tendency when α is kept within ±45°, while have quite different properties when α oversteps ±45°.     

解读连战先生的民族情

文章试图从两方面解读连战先生深厚的民族情.这种民族情一方面来源于他的家族,连战的先祖到台湾死也不臣服清,曾祖父至父亲三代以各种形式坚持抗日及父母对他言传身教;另一方面与他早年在祖国大陆的生活经历有关,从他对抗战和日本的态度及祖国大陆寻踪等方面体现出来.     

Evaluation of ultimate bearing capacity of Y-shaped vibro-pile

Based on Mindlin stress solution, a numerical computational method was proposed to calculate the stresses in the ground induced by side friction and the resistance of Y-shaped vibro-pile. The improved Terzaghi’s and ЪерезанцевВГ’s methods for ultimate bearing capacity evaluation were proposed by considering the stress strength induced by friction resistance at pile head level of Y-pile. A new method to calculate the ultimate bearing capacity of Y-pile was also proposed based on the assumptions of soil failure mode at the tip of Y-pile and the use of Mohr-Coulomb soil yield criterion and Vesic compressive correction coefficient with the induced stresses in the ground. Based on the comparisons with the field static load test results, it is found that the improved Terzaghi’s method gives higher ultimate capacity, while the other two methods shows good agreement with the field results.     

Adhesion coefficient of automobile tire and road surface

The adhesion coefficient of automobile tire and road surface was analyzed and the formula about it was derived.Some suggestions about highway construction,driving safety of the drivers and the judgment of the traffic accidents were presented.The results show that the adhesion coefficient is a function with the extreme value.If there is atmospheric pressure in the tire,the load of the vehicle and the degree of the coarse on the road surface is not selected properly,it will reach the least and affect the safety of the running automobile.     

Effects of stress conditions on rheological properties of granular soil in large triaxial rheology laboratory tests

In order to study the rheological properties of red stone granular soil,a series of rheological experiments were executed on large tri-axial rheological apparatus.Under 100,200 and 300 kPa confining stress conditions,the rheological tests were carried out.These experiment results showed that the stress conditions,especially the stress level were the critical influencing factors of the rheological deformation properties.Under the low stress level(S=0.1),the granular soil showed the elastic properties,and there was no obvious rheological deformation.Under the middle stress level(0.20.8) creep curves showed the non-linear viscous plastic rheological properties.Especially,under the stress level of S=1.0,the accelerated rheological phase of creep curves occurred at early time with a trend of failure.The stress level had obvious effects on the final rheological deformation of the soil sample,and the final rheological deformation increments nonlinearly increased with stress level.The final rheological deformation increment and step was little under low stress level,while it became large under high stress level,which showed the nonlinearly rheological properties of the granular soil.The confining pressure also had direct effects on final rheological deformation,and the final rheological deformation linearly increased with confining pressure increments.     

2008年我国房地产业的发展模式与市场把握

在深入市场调查、认真采集数据和科学分析研究的基础上,从我国新一年房地产业发展的"背景和环境"、"预期和责任"、"风险和影响"、"保障和创新"等方面进行阐述和论证.     

窃取商业秘密获得的专利权归商业秘密权利人所有——兼谈商业秘密构成要件和范围

中国加入WTO以后,知识产权的保护意识日益强化,作为知识产权范畴的专利权更是被人们普遍关注和重视.以"错案"为研究对象,运用商业秘密的有关理论以及保护商业秘密和专利权的有关法律制度,特别是从窃取商业秘密获得的专利权归谁所有的角度,对人民法院的判决进行了分析研究,指出了人民法院的判决是错误的,提出了窃取商业秘密获得的专利权归商业秘密权利人所有.这有利于人民法院公正司法,依法审判.     

从语气助词的角度浅析日语表达方式的特性

日语中有着十分丰富的语气助词,其虽然不具有实际的意义,然而通过语气助词,却能够流露出说话者的心情和感受,传递出不溢于言表的隐性含义,在日常的表达中扮演着十分重要的角色.从语气助词的角度,分析总结日语在表达上所具有的特性.     

Additional water use influencing strength and fluidity of recycled concrete

Through adding different additional water use,the compressive strength,splitting tensile strength and fluidity of recycled concrete of three aggregate combination forms were studied by experiment respectively.The experimental results show that with the increase of adding additional water use,the compressive strength and splitting tensile strength of recycled coarse aggregate concrete decrease,but that of recycled fine aggregate concrete and recycled all aggregate concrete increase firstly then decrease.When additional water use is added more 15% or 20% than that of basic ordinary concrete,the recycled coarse aggregate concrete and fine one can get pretty good fluidity.When it is added more 30%,the recycled all aggregate concrete has fluidity that is just satisfied.     

情趣与意象的契合——《逢雪宿芙蓉山主人》与《雪夜林边驻脚》之比较

通过分析《逢雪宿芙蓉山主人》与《雪夜林边驻脚》两诗的情趣和意象,发现两诗都采用了大致相似的意象.但由于诗人各自的文化传统的差异,在两诗中所传达的情趣却不同.然而,正是由于两诗各自在情趣与意象上的契合,才创造出了各自完美的诗境.     

SMW工法在顶管工程中的应用

采用了SMW工法作顶管工作（接收）井同常规钢筋混凝土比较,工期可以缩短1／3。由于四周可不作防护,型钢可回收,造价低,施工中无泥浆排放,对环境无污染,对需采用深基支护的建（构）筑物亦有参数借鉴作用。     

车辆工程专业学生工程能力培养的探索

通过对部分汽车企业的调查,针对省属院校车辆工程专业毕业生在工程能力方面的不足,在教学实践中,从专业建设的内容、方法和手段等方面进行了积极的探索。在教学计划的制定、理论与实践环节的教学、毕业设计改革等方面进行了研究。修改制定了重在学生工程能力培养的教学计划;对理论和实践教学环节进行了有机的组合;并在优选课程设计的内容,筛选毕业设计题目,保证设计质量;培养青年教师工程实践经验等方面进行了探索。     

土木工程专业的工程地质学教学探讨

工程地质学作为土木工程专业课程体系不可缺少的一门专业基础课,为了适应大土木工程专业人才培养目标的转变,其教学目的、教学内容、教学方法等也应作相应调整改革首先邓叶质学教学的目的不仅仅是知识的传授,重要的是能力的培养,尤其是获取知识和创新能力的提高,其次是教学内容要更新,既要强调基础知识的讲授,还应着眼于未来学科发展,介绍工程地质学的现状、前沿与问题,最后是教学方法要有效,就硫分利用现代化教学手段,如     

工程英语翻译刍议

通过对工程英语翻译中常见问题的分析,论述了工程英语的翻译技巧和方法,希望能对工程英语翻译有所启迪。     

软件工程学在其他工程中的应用

探讨了软件工程方法在其他工程中应用的可能。首先进行了软件工程与其他工程的几个方面简单比较，然后分别对传统软件工程和面向对象软件工程方法应用于其他工程进行了讨论，从而说明软件工程方法用到其他工程中是可能的，而且是有益的。     

工程地质研究的新理论--系统工程地质学

论述了工程地质自身的特征及应用系统工程地质(SEG)研究岩土工程的基本原则，探讨了SEG在工程地质勘探方面的应用问题。     

粘弹性流体的特殊性对油藏工程、地面工程及采油工程的影响

介绍了粘弹性流体的弹性特征、提高驱油效率的机理以及进一步提高采收率的方向 ;阐述了弹性特征 (主要是法向力和拉伸粘度 )对油藏工程、地面工程和采油工艺的影响 ,以及消除这些影响的措施和效果     

面向现代工程设计的工程制图教学改革

现代工程中并存着两种设计方法,即二维为主三维为辅的设计和立体化、数字化的三维设计.二维投影图已不能满足现代工程设计的需要,因此必须对传统的工程制图教学进行改革.以现代工程中两种设计方法为依据,结合工程制图教学中存在的不足及目前人才市场的需求,提出了面向现代工程设计的工程制图教学改革的具体方案,在二维教学的基础上,从设计的整体性出发,突出三维设计思想,形成画法几何、计算机绘图与造型和机械制图有机结合的现代工程制图教学体系,并对其可行性进行了详细分析.     

系统工程科学:系统工程学科体系新构建

复杂性科学的兴起和科学发展观的提出,为系统工程学科创造了新的发展机遇,为此提出系统工程科学的命题。按照“是什么-为什么-怎么做-何处用”的逻辑结构,构建了“认知系统工程学-理论系统工程学-技术系统工程学-实践系统工程学”这一系统工程学科体系的新框架,并分十二个主题阐述了新框架的具体内容。     

城市地下空间开发利用的工程地质与岩土工程

地下空间是城市可持续发展的重要资源,深入认识城市区域工程地质环境特点,加强城市地下工程的地质问题研究是搞好城市地下空间开发利用规划的基础,科学合理地运用地下岩土工程新技术是进行城市地下空间开发的关系。