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Vesic's solutions to cavity expansion that include cylindrical cavity expansion and spherical cavity expansion are introduced. Then cylindrical cavity expansion theory is applied to study compaction effect of pile driving in saturated soil. Based on the results of conventional triaxial tests, a trilinear curve model is used to simulate stress-strain curve of strain-softening materials. Meanwhile, trilinear curves are also used to simulate curves of volumetric strain, minor principal strain and major principal strain. By using elasto-plastic theory, analytical solutions to cylindrical cavity expansion in strain-softening soil are presented. According to the mechanism of statically pressed pile driving, compaction effect of pile tip can be viewed as hemispheric cavity expansion. Therefore spherical cavity expansion theory is applied to obtain the solutions to stress, strain, displacement fields and final pressure. Resistance force of pile tip is calculated to estimate static pressure.

介绍了Vesic关于圆孔扩张问题的解答,其中包括柱形孔扩张问题和球形孔扩张问题,并应用柱形孔扩张理论分析了饱和软土中的沉桩挤土效应问题;在常规三轴试验成果的基础上,采用三折线模型模拟具有应变软化性质的岩土材料的应力应变关系曲线,分析了在应变软化土体中沉桩时桩周土的位移场、应力场和应变场的变化,得到了解析解答;分析了静压桩的沉桩机理,并利用球形孔扩张理论,视桩端处的挤土为半个球形孔的扩张,分析了桩端处土的位移场、应力场和应变场的变化,并根据最终扩张压力计算出沉桩时的桩端阻力,可作为压桩力的估算。

Less elaborate versions may be worn at semi-formal occasions when gentlemen are in dark suits .

当在半正式场合,男士穿暗色套装时,女士服装得少一些装饰;当男士穿商务套装时,女士也得穿套装服饰或者"Good Afternoon"服装。

Howevr,the time of plantlet induction was delayed and the percentage of responding anthers as well as the number of plantlets induced per anther significantly decreased after 3kR of 60Co γ-ray radiation which was considered as a semilethal exposure.

结果表明,1kR左右的γ射线对花粉的出苗率有促进效应;3kR时,花药出苗时间延长,出苗花药率和花药产苗率明显降低,视为半致死剂量;6kR时,虽有部分花药可以出苗,但花药产苗率极低。

Ethylene production increased again as the floret began to senesce. A peak of ethylene production occurred 1.5 nL g^(-1 hr^(-1) at the half senescent floret stage.

花朵开始化时,乙烯生成又增加,在花半衰时,乙烯生成达到高峰(约为1.5 nL g^(-1)h^(-1))。

The terminal tune of semi-dynamic system is the generalization of that of stochastic process.

半动力系统端时是随机过程端时的一种推广。

When the annealing temperayure was 400℃, the stress of film was from tensile stress to compressive stress.

研究发现,在空气中退火温度到400℃时,薄膜的应力由拉应力转变为压应力,600℃时,ZnO薄膜的半峰款最窄。

The result indicate that: the electrodeposition of zinc on nickel and tungsten substrates involves instantaneous three-dimensional nucleation. The coating is the best when the current density is 4mA/cm2 and the temperature is 80 ℃. The coating by the method of the impulse electrodeposition is better than the direct current electrodeposition. Especially when f is 100Hz, ton/toff is 2/8 and J is 8mA/cm2, the coating is clean and uniformity. The crystal size is nearly 0.3μ m .

结果表明:阴极反应为准可逆反应,锌离子在镍电极和钨电极上形核是三维瞬时形核半球形扩散长大过程,直流电流密度为4mA/cm2,温度为80 ℃时,镀层质量最好;脉冲电沉积得到的镀层要优于直流电沉积得到的镀层,尤其在脉冲宽度为2ms,脉冲间隔为8ms,电流密度为8mA/cm2时,得到的镀层光滑而均匀,颗粒大小接近0.3μm。

A simulated burnt piece of coal or wood, usually a plastic casing having a wood-like or coal-like coating, with a light source mounted therein, and a strip of cloth having a shape of fire flames billowed above the simulated burning medium by blowing wind. A vision of jiggling fire flame may be viewed through a partially translucent screen made of plastic.

现有的电壁炉火焰模拟装置中,一类装置为模拟煤炭或树枝状碳块的燃烧介质,通常这些燃烧介质由表面涂有树枝状木材颜色的塑料壳体替代,里面装有一组灯泡光源,来模拟燃烧树枝状木材时的效果,再用一组火焰形状的丝绸布料飘带悬挂在燃烧介质上方,通过空气的吹动来带动飘带飘动时的投影效果,通过半透明的塑料屏幕与镜面玻璃,可以看到火焰闪动的视觉景象。

The dynam ometer test results showed that the injection timing had a large effect on the f uel consumption and it must be accurately and precisely controlled,when the engi ne was working at low load.

试验表明:喷油时刻对于降低燃油消耗率影响很大,小负荷时必须对喷油时刻进行精确控制;采用电控低压半直接喷射系统后,发动机在全负荷时的燃油消耗率下降显著,同时功率与扭矩也稍有增加。

On the day Abdul Razak Baginda was arrested, I was with him at his lawyers office at 6.30am.

他们接着连续7天,每天从早上8时半至下午6时不断地录取我的口供。

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推荐网络例句

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。

Closes the eye, the deep breathing, all no longer are the dreams as if......

关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。