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裂隙砂岩
相关语句
  cracked sandstone samples
     Dynamic fatigue properties of the cracked sandstone samples under freezing and cyclic loading
     循环荷载下冻结裂隙砂岩动疲劳特性研究(英文)
短句来源
  “裂隙砂岩”译为未确定词的双语例句
     REAL TIME CT TESTING ON DAMAGE EVOLUTION CHARACTERISTICS OF FROZEN CRACKED-SANDSTONE UNDER UNIAXIAL COMPRESSION
     冻结裂隙砂岩单轴压缩损伤特性CT试验
     Through usual consolidation grouting of dam foundation and using the sound wave measurement method, this paper analyzed quantitively the improved range and degree of weak-weathered hard bedded fissured sandstone quality. It pur forward the economic and reasonable scheme of improved foundation for optimium dam foundation design.
     从常规坝基固结灌浆入手,利用声波测试手段,定量分析弱风化硬质中厚层状多裂隙砂岩体质量的改善范围和程度,为优化坝基设计,提出经济合理的基础处理方案
短句来源
     The CT real time testing on meso-damage propagation mechanism of cracked-sandstone containing one crack under uniaxial compression loading using the CT loading system application in rock and soil media has been accomplished. The CT images, CT number and variance of CT number in different stages such as crack birthing, developing, macro-crack birthing and sample failure are contained.
     完成了单一裂纹的裂隙砂岩单轴压缩条件下细观损伤破坏机理CT实时试验,得到了裂纹萌生、发展、宏观裂纹形成、破坏等各阶段的CT图像、CT数和CT数方差。
短句来源
     The CT testing study on meso-damage propagation characteristics of frozen cracked-sandstone with double man-made cracks under uniaxial loading using the CT special testing system is accomplished. The CT images and CT number in different stages, including micro-crack birthing, development, marco-crack birthing, and sample failure, are obtained.
     对含有预制双裂纹的冻结裂隙砂岩试样单轴压缩细观损伤破坏机理进行了CT动态试验,得到了裂纹萌生、发展、宏观裂纹形成和破坏等不同阶段的岩石损伤CT图像和CT数。
     Because of the man-made cracks existing, the volume expansion values of the frozen cracked-rock sample under uniaxial compression are large than those of the frozen intact rock sample.
     预制裂纹的存在导致冻结裂隙砂岩试样的扩容量大于完整冻结试样破坏时的扩容量。
  相似匹配句对
     A Model Concerning Micro-crack Propagation and Macroscopic Failure of Sandstone Specimens
     砂岩试样裂隙扩展和宏观断裂的模型探讨
短句来源
     Comprehensive prevention and control technology of water from sandstone crack of coal mining face roof
     工作面顶板砂岩裂隙水综合防治技术
短句来源
     Slit Lamps
     裂隙
短句来源
     THE OBOAR SANDSTONE
     奥博雅砂岩
短句来源
     ANISOTROPIC DEFORMATION OF SANDSTONE
     砂岩的变形各向异性
短句来源
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Based on the idea of using the prefabricated cracks in the sandstone samples to simulate the actual rock mass, the mechanic properties of rock samples with the intermittent cracks are studied by means of dynamic cyclic loading (2.0 Hz, 20.0 Hz). Moreover, the dynamic fatigue properties of the cracked samples in the frozen state (-15 ℃) are also studied via the contrast of their deformation and strength with those of the saturated samples.The test results indicate that (1)fatigue effect: the cracked samples have...

Based on the idea of using the prefabricated cracks in the sandstone samples to simulate the actual rock mass, the mechanic properties of rock samples with the intermittent cracks are studied by means of dynamic cyclic loading (2.0 Hz, 20.0 Hz). Moreover, the dynamic fatigue properties of the cracked samples in the frozen state (-15 ℃) are also studied via the contrast of their deformation and strength with those of the saturated samples.The test results indicate that (1)fatigue effect: the cracked samples have more obvious fatigue effects than the non cracked samples under frozen condition;(2)freezing effect: the freezing lightens the fatigue effect much more for non cracked samples than for cracked samples;(3)loading frequency (rate) effect: freezing also reduces the loading rate effect for cracked samples, which means that the strength increasing with loading frequency (rate) for saturated rock samples is more obvious than that for frozen rock samples.

通过在砂岩样中预制裂隙的方法来模拟实际裂隙岩体 ,借助于中低频率 (2 0 .0Hz和 2 .0Hz)动循环加载和常规加载试验 ,对烘干、饱水和饱水冻结砂岩样在循环作用下引起的低周疲劳特性和不同加载频率下的速率效应进行了研究 ,试验结果表明 :①疲劳效应 ,冻结状态下 ,裂隙砂岩样比无裂隙砂岩样疲劳效应明显 ;②冻结效应 ,冻结作用减弱了试样的疲劳效应 ,尤其是对无裂砂岩隙样 ;③加载 (频率 )率效应 ,冻结作用降低了裂隙砂岩样加载率效应 ,意味着饱水岩样强度随加载 (频率 )率增加而增加的幅度较冻结样明显。

Rock is made of mineral grains with fissures and cracks and it is not nonlinear elastic at all.There is no mechanical relation between the dynamic and static parameters.For weak rock with plenty of fissures such as sandstone and coal,the dynamic modulus is larger than the average modulus.However,for marble rock with different grains,the relation between the dynamic modulus and the average modulus is much complex although the dynamic modulus is larger than the deformation modulus.The dynamic modulus is even smaller...

Rock is made of mineral grains with fissures and cracks and it is not nonlinear elastic at all.There is no mechanical relation between the dynamic and static parameters.For weak rock with plenty of fissures such as sandstone and coal,the dynamic modulus is larger than the average modulus.However,for marble rock with different grains,the relation between the dynamic modulus and the average modulus is much complex although the dynamic modulus is larger than the deformation modulus.The dynamic modulus is even smaller than the deformation modulus for the volcanic or metamorphic rock.The dynamic Poisson's ratio is very sensitive to the wave speed and no clear pertinence with the static parameter.Rock blocks from in?situ have unloaded and dehydrated,and the machining of specimens may produce new damage.There are opening fissures in the specimen,which results in the supersonic wave speed lower.For example the average value of longitudinal speeds measured in the dike ends of one marble mine is larger than the maximum speeds of specimens.Therefore,it is not safe to evaluate the integrality of rock mass by the ratio of the supersonic wave speed in rock mass to that in the specimen.

岩石由矿物颗粒组成,内部存在弱面、裂隙等结构,并非线弹性材料,动静态参数之间并没有确定的力学关系.含有大量裂隙的砂岩、煤等软弱岩石,动态模量大于平均模量;大理岩的动态模量大于变形模量,但与平均模量的关系较为复杂;火成岩及其变质岩,动态模量可以小于变形模量.动态泊松比对波速极端敏感,与静态参数没有明确的关系.现场取回岩块已经卸载、脱水,岩样加工也会对材料产生损伤,内部出现张开裂隙,超声波速度降低.如某大理岩矿岩墙端头所测纵波速度的平均值就大于室内岩样纵波速度的最大值,因而以岩体与岩样纵波速度的比值评价岩体完整性将偏于不安全.

The CT real time testing on meso-damage propagation mechanism of cracked-sandstone containing one crack under uniaxial compression loading using the CT loading system application in rock and soil media has been accomplished. The CT images, CT number and variance of CT number in different stages such as crack birthing, developing, macro-crack birthing and sample failure are contained. Comparison to the noncracked-rock sample, it shows that the pre-crack can seriously affect the location of new crack birthing...

The CT real time testing on meso-damage propagation mechanism of cracked-sandstone containing one crack under uniaxial compression loading using the CT loading system application in rock and soil media has been accomplished. The CT images, CT number and variance of CT number in different stages such as crack birthing, developing, macro-crack birthing and sample failure are contained. Comparison to the noncracked-rock sample, it shows that the pre-crack can seriously affect the location of new crack birthing and the formation of connectivity macro-crack. Because of the pre-cracked existing, the volume expansion values of the cracked-rock sample under uniaxial compression are large than the noncracked-rock sample.

完成了单一裂纹的裂隙砂岩单轴压缩条件下细观损伤破坏机理CT实时试验,得到了裂纹萌生、发展、宏观裂纹形成、破坏等各阶段的CT图像、CT数和CT数方差。结果表明,与无预制裂隙的岩石试样相比,已有预制裂纹对新的裂纹的起裂位置及贯通性宏观破坏裂纹的形成具有重要影响,预制裂纹的存在导致裂隙砂岩试样的扩容量大于完整试样破坏时的扩容量。

 
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