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loess engineering
相关语句
  黄土工程
     Development of Loess Engineering Properties Research in China
     我国黄土工程性质研究的发展
短句来源
     Loess engineering geological characteristics of eastern Gansu province, China
     陇东地区黄土工程地质特征
短句来源
     This paper introduces the definition of loess collapse initial compression, discusses the application of collapse initial compression in loess engineering,and points out that index of collapse initial compression must be determined strictly in loess engineering.
     介绍了黄土湿陷起始压力的定义,论述了湿陷起始压力在黄土工程中的应用,指出在黄土工程应用中,必须严格确定湿陷起始压力指标。
短句来源
     This paper introduces the definition of initial colla pse pressure of lo ess soil,discusses the application of initial collapse pressure in loess enginee ring, pointing out that the index of initial collapse pressure applied in loess engineering must be determined strictly .
     介绍了黄土湿陷起始压力的定义 ,论述了湿陷起始压力在黄土工程中的应用 ,指出在黄土工程应用中 ,必须严格确定湿陷起始压力指标。
短句来源
     This paper sums up the research achievements of loess microstructure, that is the microstructure of loess has many things to do with its seismo-compaction, hydrocompaction and liquefaction, and points out that the quantification of loess microstructure is the research direction of loess engineering characteristics.
     总结了黄土微观结构研究成果,即黄土的微观结构与其震陷性、湿陷性液化有紧密的联系,指出黄土微观结构的定量化是黄土工程性质的研究方向。
短句来源
  “loess engineering”译为未确定词的双语例句
     An Application Study on Reflex Wave and Ultrasonic Testing Technology used in Collapsible Loess Engineering
     反射波和超声波检测技术在砼桩基工程检测中的应用研究
短句来源
     Based on dynamic tests of loess, loess engineering properties and damage characteristics of earthquake in
     本文根据黄土动力试验研究的成果及黄土的工程性质和黄土地区地震破坏的特点等方面,对目前西北黄土地基的现状进行了抗震性能的评估。
短句来源
     (2) the problem between the urban development and the loess engineering;
     2)建设城乡与黄土地质生态结构问题;
短句来源
     Under the stable and constant height condition,the designing slope beyond 15°~60° is the less erosive intensity angle. When the angle is bigger than 70°, it is greatly fit the perpendicular loess engineering slope.
     坡高一定及边坡稳定情况下,边坡坡角应尽量避开15°~60°范围,大于70°或小于15°的坡面冲刷很小,对于70°以上坡角特别适应于直立性黄土坡面。
短句来源
     Based on testing,analysis and contrast for collapsible loess engineering by using sonic transmission and reflex wave testing,a conclusion is drawn that different stake technology selects reliable testing methods.
     通过用声波透射法和反射波法对砼桩基的测试、分析、对比,得出不同的成桩工艺选择适合可靠的检测方法。
短句来源
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  相似匹配句对
     On Engineering
     论工程
短句来源
     Study on Engineering Characteristics of Saturated Loess
     论饱和黄土的工程特征
短句来源
     The effect of compacting on the engineering properties of loess
     挤密对黄土工程特性的影响
短句来源
     Results Engineering L.L.
     结果 获得了能表达PAL的乳酸乳球菌基因工程菌株。
短句来源
     Loess and Environment
     黄土与环境
短句来源
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A new failure criterion is suggested based on fuilure behaviour of loess.Mohr-Coulomb criterion is used on P-Q plane,but φ1>φ and there is no angularity on a plane in the criterion.The result of its calculation is in good agreement with experimental reasult of several soils;Some typical criteria are commented based on the result of loess testing,which may be serred as references for three-dimensional calculation of loess engineering

本文基于黄土破坏特性提出了一个新的破坏条件,该条件在P-Q平面上仍采用莫尔库仑条件,但φ_1>φ_0;在π平面上无尖角;公式计算曲线与几种土试验实测值吻合很好,根据黄土试验资料对黄土几种典型破坏条件进行了评述,供黄土工程三维数值计算参考。

Based on dynamic tests of loess, loess engineering properties and damage characteristics of earthquake in

本文根据黄土动力试验研究的成果及黄土的工程性质和黄土地区地震破坏的特点等方面,对目前西北黄土地基的现状进行了抗震性能的评估。

The Thickest loess deposits in the world are observed at the Chaoxian village, Jingyuan, Gansu, China. Developed on the 6th terrace of Yellow River and having a typical loess-paleosol sequence. this loess section is about 505 m thick. with 33 layers of paleosols. According to the paleomagnetic data, the Jingyuan section contains Brunhes Normal Polority Zone and Matsuyama Reversal Polority Zone. BIM boundary is located in L8 (8th layer of loess from top downward). The Jaramillo (J) Normal Polority Subchron corresponds...

The Thickest loess deposits in the world are observed at the Chaoxian village, Jingyuan, Gansu, China. Developed on the 6th terrace of Yellow River and having a typical loess-paleosol sequence. this loess section is about 505 m thick. with 33 layers of paleosols. According to the paleomagnetic data, the Jingyuan section contains Brunhes Normal Polority Zone and Matsuyama Reversal Polority Zone. BIM boundary is located in L8 (8th layer of loess from top downward). The Jaramillo (J) Normal Polority Subchron corresponds to the interval from L11 to S12 Jingyuan loess began to form at 1. 40 MaBP. The rate of loess deposition in Jingyuan loess section is about 36 cm/ka.The component particles of loess in Jingyuan are less than 0. 25 mm. with about 65%-68% silts (0. 050 0.01 mm). The average quantity of particles which are less than 0. 002 mm is about 7. 0%. Its main chemical composition is SiO2 and Al2O3 the contents of which are about 57. 21% and 11. 90% respectively. A obvious characteristic of the chemical component is that content of Fe2O3 is smaller (2. 87%). while the content of CaO is higher (more than 8. 31 %). The above-mentioned fact shows that the paleo-conditions in Jingyuan may be arid-cold during the formation of loess.Under the scanning electron microscope (SEM). the microfabrics of the loess in Jingyuan change from the top to the bottom gradually from the weak-cementation fabric group to the semi-cementation one, and then to the cementation fabric group, and correspondingly, the loess engineering properties are also getting better. For instance, coefficients of collapsibility obviously diminish,while initial pressure of collapsing gradually increases. It indicates that the mechanical properties of loess are closely related to the microfabric characteristics.The Jingyuan section has been correlated with a composite oxygen isotope (δ18O) record. In the past 0. 9 Ma, 9 loess-paleosol groups coincide with 9 climatic cycles of oxygen isotope record. which fluctuate within a wide range and a long-period, and from 1. 38 Ma to 0. 9MaBP, the climatic cycles of δ18O record fluctuated within a narrow range and a short-period, being coincidence with the thin loess and closely bedded paleosols in the Jingyuan section.

甘肃靖远曹岘剖面系黄河六级阶地上的黄土堆积,磁性地层学研究结果表明,曹岘黄土堆积始于1.40MaBP。其化学成分以SiO2和Al2O3为主,Fe2O3含量低,CaO含量高;原生碳酸钙颗粒几乎未发生淋溶作用,这些标明黄土堆积过程中的气候是干燥的。剖面自上而下,显微结构由微胶结到半胶结,直到胶结,力学性质相应由差变好,说明黄土的力学性质与其显微结构有着密切的内在关系。靖远曹岘黄土-古土壤序列可与深海复合δ18O气候曲线对比,在1.38—0.90MaBP气候波动以周期短、幅度小为特征,而0.90MaBP以来的气候变化以周期长、幅度大为特征,靖远剖面为研究黄土形成机制、古气候变化、黄土高原形成,乃至全球变化提供了重要地质记录。

 
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