查询词典 loess

Directed against stress properties of lining structure of loess highway tunnel, the paper selects three loess highway tunnels as relying engineering according to buried depth and soil properties, and takes field observation synthetically for the first time, which pays more attention to researches on the change regulations of pressure acting on first lining and invert, axial force of lattice girder, contact stress between first and second lining, concrete strain of second lining verse the time and distributions in different positions.

针对黄土公路隧道衬砌结构受力特性，根据埋深和土质情况，选取三座黄土公路隧道为依托工程，首次开展了大规模系统的现场测试，着重研究了一衬和仰拱围岩压力、格栅拱钢筋轴力、一衬和二衬接触应力以及二衬混凝土应变时间变化规律及分布特性。

The eolian loess-paleosol sequences on the Loess Plateau basically record a history of alternation between winter and summer monsoon dominance, which can be seen as a reflection of global climatic cycles in East Asia. So far, spatial and temporal pattern of East Asian summer monsoon has been reconstructed mainly by magnetic susceptibility record.

黄土高原风成堆积的黄土-古土壤序列完整记录了东亚古季风气候的变迁，即冬季风优势期和夏季风优势期相互交替的历史，可视为全球古气候旋回在东亚地区的表现。

One of the most important methods to study the loess environmental and climatic change was by the loess' magnetic susceptibility curve.

而通过研究黄土磁化率曲线又是研究黄土环境变化的一种重要方法。

According to the characteristics of collapsible loess ground and the practice of multistoried engineering,the designing and testing of earth pile composite ground is introduced and the advantages of earth pile in treating thicker collapsible loess ground in multistoried engineering is proved.

针对湿陷性黄土地基的特点，结合多层建筑的工程实际情况，介绍了土挤密桩复合地基的设计和检测工作，阐述了土挤密桩在多层建筑中处理厚度较大的湿陷性黄土地基的优势。

This paper explain the results and suggests that the upper part of the section is normal loess/paleosol series, while the lower part is redeposited loess and paleosols.

结合该剖面的岩石磁学性质与该区域其他剖面以及洛川剖面的对比，本文的解释是该剖面上部为正常的黄土古土壤序列，而底部为再搬运沉积的黄土古土壤。

Combined a large number of on -site investigate and survey data of loess area in the north of Shaanxi Province, the paper analyzed the influence factors and interrelationship of slope erosion, then put forward the main influence factors , the peculiarity of outwash destructions the main style and protective measures about slope erosion of highway in loess area. The first: the emphasis about protective measures of cut-slope are the selection of rate of grade, the place of plain stage of slope, the slope protection; the second: the emphases about drainage of cut-slope is the rational installation and mating of drainage establishment; And following this principle: the effective holding up , the rapid obviating, the smooth articulation, the seepage prevention and prevent erosion.

根据陕北黄土地区公路的大量现场调查和实测资料，分析了公路边坡冲蚀的影响因素及其相互关系，提出了黄土地区公路边坡冲蚀的主要影响因素、冲蚀破坏特点、主要类型与防护对策，得出：1、路堑边坡坡面冲蚀防护重点是坡率选择、边坡平台设置、边坡防护；2、路堑边坡排水重点是排水设施的合理设置与配套；并遵循有效拦截、迅速排除、衔接顺畅、防渗防冲等原则。

Pluvial on the composition of the underlying surface, the overlying loess-like loam, thin layer of loess north.

洪积物组成地面的底层，其上覆黄土状亚粘土，向北黄土层变薄。

Lijiaxia landslide is a large rockslide , encountered in Loess Plateau which is famous for lots of loess landslides .

李家下滑坡是大型岩质滑坡，发育在黄土滑坡众多的黄土高原区。

Aiming at the geological defects in western loess highway region and its harmfulness for construction and management, we introduced multicomponent seismics method in shallow loess highway engineering exploration.

针对我国西部黄土公路下伏大量地质缺陷及其对公路交通建设和运营的危害性，将多分量地震勘探技术引入浅层黄土公路工程勘探中。

In this paper, based on the triaxial test, it is discovered that the structured loess has special mechanical effect of shearing strain rate, and it is proved that the structured loess also has the phenomena of strain rate softening. The CU shear strength and cohesion c increase at first, then decrease with the increase of strain rate, and a critical rate exists; the angel of internal friction doesn't change visibly with the strain rate.

通过结构性黄土三轴试验研究，发现结构性黄土具有独特的剪应变速率力学效应，"应变速率软化"现象同样存在于结构性黄土中；其CU剪切强度和凝聚力c随剪应变率的增大而呈现先增大后减小的特征，存在临界速率现象，而内摩擦角随剪切速率的增大基本上呈线性减小的趋势。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。