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overburden
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  覆盖层
     The reflection legs from its overburden is domelike, and its velocity is 2,430-2,700 m/s.
     上覆盖层的反射外形为穹窿状,速度为2,430~2,700米/秒;
短句来源
     Owing to the overburden being thicker at chainages 0+200.00~0+280.00 m(El.810~El.950 m) at the right side of slope for Zipingpu water control project,the slope is designed to be reinforced by anti-slide piles,and it has achieved good effect for the stability of slope.
     紫坪铺水利枢纽溢洪道右侧边坡,桩号0+200.00~0+280.00 m段高程810~950 m区间内侧边坡覆盖层较厚,设计采用抗滑桩加固边坡,对提高边坡的稳定性具有较好的效果。
短句来源
     The fixed NH + 4 capacity of all natural layers in lou soil was determined in this thesis,they were 482.2±10.4,1134.9±4.0 and 553.0±11.3 mg N/kg soil in overburden layer,claying horizen and loess parent material horizen respectively.
     确定了土娄土各自然层的固定态铵容量 ,覆盖层、粘化层和黄土母质层分别为( 4 82 .2± 1 0 .4) mg N/kg、( 1 1 34.9± 4.0 ) mg N/kg和 ( 553.0± 1 1 .3) mg N/kg土。
短句来源
     (4)The optimizing design ratio of spandrel groove high slope is recommended as 1:0.25 in the fresh rock mass or weakly weathered rock mass(lower band), 1:0.35-1:0.50 in the weakly weathered rock mass (upper band), and 1:1.25 in the overburden.
     (4)拱肩槽高边坡的最优设计坡比建议为:微新、弱下风化岩体取为1:0.25,弱上风化岩体取为1:0.35-1:0.50,覆盖层开挖坡比1:1.25。
短句来源
     Analyzing the character of hydrologic and silt of Xincheng Yellow River bridge, the stream design discharge is determined to be 6 500 m3/s, stream mean velocity to be 3.98 m/s, scour rate of main current to be 1.39, average grain diameter of bed overburden layer to be 30 mm;
     调查分析兰州市新城黄河大桥所在河段的水文泥沙特征,确定河道按百年一遇流量标准设防,其设计流量为6 500 m3/s,河道平均流速为3.98 m/s,主流冲刷系数P=1.39,河床覆盖层平均颗粒为30 mm。
短句来源
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  覆岩
     3. Calculate the overburden pressure by density logging;
     3.利用密度测井方法计算出上覆岩层压力;
短句来源
     Measurement the overburden deformation and failure caused by underground mining may provide reliable guidance for mining design and safe production.
     地下采矿活动引起上覆岩层移动变形和破坏 ,对覆岩变形破坏进行监测 ,可以为采矿设计和安全生产提供可靠的技术保障 .
短句来源
     Prediction of the Water Suture Zone's Height in the Overburden of 1201(3) Working Face in Xieqiao Mine
     谢桥煤矿1201(3)工作面覆岩导水裂缝带高度预测
短句来源
     The formation pressure system includes the overburden pressure (P0), formation pore pressure (Pp), fracture pressure (FP) and breakout pressure (BP).
     地层压力体系包括上覆岩层压力(P_0)、地层孔隙压力(Pp)、地层破裂压力(FP)和坍塌压力(BP)。
短句来源
     THEORY AND PRACTICE OF ENGINEERING GEOLOGICAL PREDICATION OF MINING-INDUCED OVERBURDEN FAILURE
     开采覆岩破坏工程地质预测的理论与实践
短句来源
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  “overburden”译为未确定词的双语例句
     Result from the study shows that the Quaternery overburden in the surveyed area is 600 m, and the 4 refraction interfaces respectively listed as P1、P2、P3and P4 are observed in the depth range above 400 m.
     测区第四纪复盖层厚度大于600m。 400m以上观测到P_1、P_2、P_3、P_4 4个折射界面。
短句来源
     Compared with the results of conventional core analysis, under reservoir conditions (net overburden pressure>20MPa), porosity decreases about 3% to 10%, permeability increases about 12% to 70%.
     与常规岩心分析结果相比 ,油藏条件下 (净覆压大于 2 0MPa)孔隙度约减小 3%~ 10 %,渗透率约减小 12 %~ 70 %。
短句来源
     logρv can be decreased as the increase of Vorganosilicon and mE-20. ΔR/R of thin film resistors coated with coating obtained under optimizing conditions were 0.5% and 0.25% respectively after water boiling and overburden test.
     logρv随Vorganosilicon和mE-20增加而减小。 刷涂优化条件下所得的涂料后,薄膜电阻器煮水和超负荷试验的ΔR/R分别可达0.5%和0.25%。
短句来源
     New data have been obtained by tracing and observations of the characteristics of faults F7(8) and F201, overburden stripping and fault gouge dating in the Daliushu dam region, which verify that fault F201 is a regional seismogenetic fault that has been very active since the latest Pleistocene and Holocene, and determine the existence of left-lateral strike-slip motion for fault F7(8).
     通过对大柳树坝址区F201、F7(8)断层带特征的追索观测、工程揭露和断层泥测年,获得F201、F7(8)断层活动特征的新资料,证实了F201断层是一条晚更新世晚期和全新世以来强烈活动的区域发震断层,同时确定了F7(8)断层水平左旋走滑作用的存在;
短句来源
     Theory and Practice of Ground Pressure on Shaft due to Thick overburden
     立井厚表土层地压的理论与实践
短句来源
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  overburden
In addition, by measuring only the higher energy muons of the air shower, the lowest energy muons being filtered out by the rock overburden, the data is sensitive also to the studies of the upper parts of the air shower.
      
The new mode sustains steep slope mining, increases the angle of ultimate slope, and reduces invalid overburden amount of rock by 3%-5%.
      
When extrapolating within the overburden, a stable wavefield continuation algorithm in combination with a stabilization factor is applied.
      
This avoids accumulating inverse Q-filter errors within the overburden.
      
Where the difference between pressure of fluids and the overburden pressure exceeded greatly the competence of the rocks, fluid junctions occurred and the velocity of the fluid flow increased as a result.
      
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During the past several years, an investigation of the earth's crust using seismic reflection method has been carried out in Eastern Chai Dam Basin and Kansu. At the distances of 40—100kms from the shot point, ordinary reflections from the deep boundaries in the earth's crust can be identified. Apart from these ordinary reflections, another kind of phases with different properties have been discovered. Their apparent velocities are noticeably greater than that of the ordinary reflections. Their apparent velocities...

During the past several years, an investigation of the earth's crust using seismic reflection method has been carried out in Eastern Chai Dam Basin and Kansu. At the distances of 40—100kms from the shot point, ordinary reflections from the deep boundaries in the earth's crust can be identified. Apart from these ordinary reflections, another kind of phases with different properties have been discovered. Their apparent velocities are noticeably greater than that of the ordinary reflections. Their apparent velocities do not change regularly with distances. Their travel time curves intersect with the ordinary reflections and disappear suddenly at a distance of about 80—90 kms from the shot point. From their properties, it can be shown that a high velocity imbedded layer with continuously increasing velocities must exist in the earth's crust of these regions. The calculated parameters of this high velocity layer in these two regions are: Kansu Eastern Chai Darn Basin Total thickness of overburden layers 18.8 kms 30.5 kms Average velocity of overburden layers 5.5 km/sec 5.3 km/sec Thickness of high velocity layer 6.0kms 3.2kms Velocity of high velocity layer 7.5—8.5km/sec 7.5—8.0km/sec Both the upper and lower boundaries of this high velocity layer are shown to have good reflectivity, and are apt to produce multiples. The parameters of succeeding layers in the earth's crust can be calculated from their corresponding reflection arrivals. The depths of Mohorovii discontinuities from the earth's surface are calculated to be 51 and 52 kms in Kansu and Eastern Chai Dam Basin respectively. It is also argued that if this high velocity layer as discovered in Northwestern China exists extensively in the continental earth's crust, the scatterly distributed velocities of P~* and the mechanism of propagation of Lg waves can be more properly explained.

在我国西北地区的柴达木盆地东部和甘肃地区,在距离炮点40互100公里处,能够接收到不少能量较强的地壳深界面反射波。另外还发现一种与一般反射波性质不同的波,其视速度特大,视速度随距离的变化不大,而且有较明显的终点;其吋距曲线与一般深界面反射波的时距曲线相交。根据它的特征可以判断地壳中存在具有速度梯度的高速夹层.求得的夹层参数为: 甘肃地区柴达木盆地东部覆盖层厚度 18.8公里 30.5公里覆盖层平均速度 5.5公里/秒 5.3公里/秒夹层厚度 6.0公里 3.2公里夹层速度 7.5—8.5公里/秒 7.5—8.0公里/秒夹层的上下界面均为强反射面,可以产生多次反射波。分別利用相邻两个反射波可以求得各层参数,并能避免射线折射的影响。甘肃地区和柴达木盆地东部的地壳厚度分別为51和52公里。地壳中有高速夹层的存在,可以更好地说明P~*速度分散的原因,而且也能够解释Lg波的传播机制。

By use of the teleseismic P arrival times at 15 stations of Beijing network for 120 events distributing over various azimuths, we studied the three-dimensional P velocity structure under Beijing region. In calculating the theoretic traver-time we adopted the soure parameters given in BISC, and used the J-B model as the stan-dard model of earth. On inversion, we a dopted singular value decomposition as a generalized inversion package, which can be used for solving very large over-deter-mined system of equations...

By use of the teleseismic P arrival times at 15 stations of Beijing network for 120 events distributing over various azimuths, we studied the three-dimensional P velocity structure under Beijing region. In calculating the theoretic traver-time we adopted the soure parameters given in BISC, and used the J-B model as the stan-dard model of earth. On inversion, we a dopted singular value decomposition as a generalized inversion package, which can be used for solving very large over-deter-mined system of equations Gm = t without resort to normal equations GTGm = GTt. The results is that within the crust and upper mantle under Beijing region there are clear lateral differences. Thers the results obtained by use of data 1972-1975, it can be seen that there are three different zones of P-velocity. In the south-east of Beijing region, P velocity is lower than that of the normal model by 10-14% within the crust, and by 8-9% within the upper mantle. The north-west of Beijing region is a higher-velocity zone, within which the average P-velocity is faster than that of the normal model by about 9%. It disappears after entering into the upper mantle. The central part of this region is a normal zone. On the surface, the distri-bution of these P velocity variations corresponds approximately with the distribution of the overburden. But. in the deeper region, the distribution of velocity variation agrees with the distribution of seismicity. It is interesting to note that the hypo-centers of several major earthquakes in this region, e.g. the Sanhe-Pinggu earthquake (1679, M = 8), the Shacheng earthquake (1730, M=63/4 and the Tangshan earth-quake (1976, M = 7.8) are all located very close to this boundary of these P-velocity variation zones.

用分布在北京地区各方位上,震中距在20°—100°范围内的120次远震在本区15个地震台上的P波到时,研究北京地区地壳和上地幔的三维速度结构。 在正演时,远震的震源参数(λ、φ、h、o)采用BISC的数据,以J-B模型作为标准地球模型。 在反演中,采用奇异值分解的方法直接解大型超定方程组Gm=t,而不借助于正规方程组G~TGm=G~Tt。 结果表明:北京地区地壳和上地幔的P波速度存在明显的横向差异。就1972年—1975年的资料所得的结果来看,存在东南的相对低速区(地壳中P波速度低10—14%,在上地幔中低8—9%),西北部的相对高速区(在地壳中P波速度高9%左右,进入上地幔后差异逐渐消失),中部是正常区。 在地表,速度差异带的分布与覆盖层的分布大体一致。而在深部,这种差异带的分布与地震活动性分布相当符合。而且,本区的几次强震:三河—平谷地震(1679年,M=8)、沙城地震(1730年,M=6 3/4)和唐山地震(1976年,M=7.8)的震源正好在这些速度差异带的边界附近。

This paper based on the results of observations of box foundations for four multi-storied buildings in shanghai, ranging from 10 to 12 stories, is divided into three parts. The first part deals with the deformation properties of foundation soil during the following three stages:(a) When the foundation pressure increased from unloading condition (due to excavation) to the orignal overburden pressure, (b) When the net foundation pressure increased from zero to its maximum value and (c) When the foundation...

This paper based on the results of observations of box foundations for four multi-storied buildings in shanghai, ranging from 10 to 12 stories, is divided into three parts. The first part deals with the deformation properties of foundation soil during the following three stages:(a) When the foundation pressure increased from unloading condition (due to excavation) to the orignal overburden pressure, (b) When the net foundation pressure increased from zero to its maximum value and (c) When the foundation pressure was kept constant (after the construction). In this part a tentative method for calculating settlements of deeply embedded box foundations is also presented. The second part discusses the characteristics of the foundation pressure distribution and the method for computing pressure distribution is proposed.The last part presents the effects of temperature on the measurement of stress in reinforcements, and also the method for estimating stress in box foundations.

本文根据上海市区康乐大楼、华盛大楼、胸科大楼和四平大楼箱形基础的实测资料,着重对深埋(系指埋深超过5m)箱形基础地基变形三个阶级的特性及计算方法、基底反力的分布规律及计算方法、基础应力量测中的温度影响及估计基础应力的方法等问题进行研究和探讨.

 
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