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For composite foundation with compressible piles, based on displacement harmony condition, and combining with load transfer method and approximate solution of differential equation, analysis methods of linear and nonlinear interaction between piles and surrounding soil were suggested.

对柔性桩复合地基,是基于位移协调条件,并结合荷载传递法与微分方程的近似解法——子域法,提出了变截面自由单桩与地基土、刚性承台下柔性单桩和变截面柔性单桩与地基土、刚性承台下柔性群桩与地基土线性及非线性相互作用的分析方法,并得到有效桩长、桩与基土的荷载分配及刚性承台下各桩桩项荷载分配、荷载—沉降关系、荷载传递规律等有意义的结果。

For composite foundation with compressible piles, based on displacement harmony condition, and combining with load transfer method and approximate solution of differential equation, analysis methods of linear and nonlinear interaction between piles and surrounding soil were suggested. A lot of significative results, for example availability pile length, load distribution between piles and surrounding soil, load distribution among all piles under rigidity pile-cap, load-settlement relation etc, were obtained.

对柔性桩复合地基,是基于位移协调条件,并结合荷载传递法与微分方程的近似解法—子域法,提出了变截面自由单桩与地基土、刚性承台下柔性单桩和变截面柔性单桩与地基土、刚性承台下柔性群桩与地基土线性及非线性相互作用的分析方法,并得到有效桩长、桩与基土的荷载分配及刚性承台下各桩桩顶荷载分配、荷载一沉降关系、荷载传递规律等有意义的结果。

Finally, the phenomenon of subcutaneous nodes is expounded. The research results have great significance to evaluate the deliquescent character of cleaving stone in expansive soil and disclose the cha...

其研究成果对评价膨胀土的潮解特性,揭示了膨胀土和改性膨胀土特性以及强度形成机理具有重要的意义,并为今后膨胀土的研究和应用提供了一定的理论依据。

During the process of filling, the water heads of all piezometers are higher than the surface of the soil. Moreover, the deeper the piezometer is ebedded, the higher the piezometric head will be.

饱和粉土和黏性土在填筑过程中,底板所受浮力极大,并可能超过被其排开的饱和土的重量,且测压管水头在填筑过程中均超过填土面高度,埋置越深的测压管水头越高。

Shear strength of undisturbed soils has positive correlation with root content , and relevant regression models about undisturbed soil were established .

原状土的剪切破坏近似于塑性破坏,而重塑土则属于弹性破坏;原状土的抗剪强度与含根量呈正相关,并以此建立关于原状土的抗剪强度回归模型。

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。

The first and second insert organophilic montmorillonite are prepared from sodium dodecylsulfonate and cetyltrimethylammonium bromide.

采用十二烷基磺酸钠及十六烷基三甲基溴化铵对蒙脱土进行了一次、二次插层改性,红外光谱和X射线衍射表明,两种有机插层剂均已进入蒙脱土的层间,有机蒙脱土的层间距由1.22 nm增加到3.64 nm;沉降实验结果表明这种改性蒙脱土在有机介质中表现出很好的分散性。

Kaolin is further broken down into: gaolin gaolin multi-batch water, and so on, these white clay were commercial production but now coated paper with a white clay, basically the gaoling group is referred to as gaolin, is coated with white clay.

高岭土又进一步细分为:高岭土、多水高岭土等,这些白土都已经被商品化生产但是,现在涂布纸用白土中,基本上把高岭石类都称为高岭土,也就成为涂布用白土的代名词。

Based on Tseng-Lytton evaluation model for permanent deformation, and evaluation model for permanent deformation of clayed subgrade soils is established by improving and calibrating Tseng-Lytton model.

利用室内重复荷载三轴试验,研究了在含水量、压实度和偏应力影响下粘性路基土的永久变形特性,并以Tseng-Lytton路基土永久变形预估模型形式为基础,对Tseng-Lytton模型进行了改进和标定,建立了粘性路基土的永久变形预估模型;最后利用分层应变总和法,并结合一个典型粒料柔性基层沥青路面结构实例,计算了路基土的永久变形量。

The time from saturated soil moisture content to wilting percentage of Aeolian sandy soil, Loessial soil and Lou soil was extended by 244.72%,251.11% and 36.31% respectively when Sodium Polyacrylate was applied at the suggested dosage.

风砂土、黄绵土与塿土的蒸发强度随着高分子化合物聚丙烯酸钠用量增加而降低,聚丙烯酸钠用量为0.5%时,砂土、黄绵土与塿土10天累积蒸发量分别较对照降低了59.89%、48.92%与55.81%;综合考虑对土壤蓄水与蒸发能力的影响,聚丙烯酸钠用量为风砂土、黄绵土应控制在0.08%~0.2%,塿土中用量必须严格控制在0.2%左右;在上述用量条件下,风砂土、黄绵土、塿土从饱和含水量蒸发失水至凋萎含水量的时间分别被延长了244.72%、251.11%与36.31%左右。

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I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时,滚道或滚动元件褪色是很常见的特征。

The lawyer's case blew up because he had no proof.

律师的辩护失败,因为他没有证据。