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subgrade相关的网络例句

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Highway subgrade Highway subgrade may be defined as the supporting structure on which pavement and its special undercourses rest .in cut sections ,the subgrade is the original soil lying below the special layers designated as base and subbase material .in fill section ,the subgrade is constructed over the native ground and consists of imported material form nearby roadway cuts or from bowwow pits.

公路路基公路路基可界定为支撑结构对路面和特殊undercourses休息。在削减部分,路基是原来的地势低于土壤的特殊层指定为基础和基层材料。填补节中,路基建造的本地地面,由进口物质形式附近的巷道削减或从bowwow坑。

During treatment of soft soil subgrade located in large regional fault zone, model of floating bridge above water is adopted. Based on characteristics of subgrade soil with large porosity and loose, consolidation grouting method is used to raise load capacity of subgrade which can combine underground reinforced concrete raft foundation with steel pipe friction micropile to improve integrity strength of special heavy traffic soil subgrade.

摘要] 阐述在区域性大型断层带的软基处理中运用"水上浮桥"的建模思维方式,根据路基岩土体孔隙率大、松散的特点,采用固结灌浆从挖掘岩土体本身的潜力提高地基承载力,固结灌浆岩土体使准连续配筋混凝土地下筏板基础与摩擦型钢管微桩有机结合,以此提高运煤特重交通路基的整体强度。

On the basis of the data of subgrade frost heaving observation in Chang-Yu freeway from 2000 to 2002 years,this paper analyzes the factors of temperature,water, soil and subgrade type which influence the subgrade frost heaving.

根据2000—2002年间对吉林省长余高速公路路基冻胀观测所获得的资料,分别分析了温度、水分、土质、路基类型等因素对路基冻胀的影响。

The hydraulic loading system is developed and used to study the frost heaving characteristics of the subgrade soils under dynamic loading in closed system and open system . On the base of these work, the conclusions are as follows:1. Because of the the fine-grained fill, the frost deformations of Beijing-Baotou railway subgrade and Baotou-Lanzhou railway subgrade are holistically irregular, and great discrepancies exist among the frost heavings of subgrade at different sections.

本文根据冻害较严重的京包铁路、包兰铁路的气候、地质条件的调查和路基冻胀变形监测,结合路基土的性质对京包铁路、包兰铁路的冻害给出了评价;为了模拟振动荷载作用下土的冻胀,研制了液压动力加载系统;在室内采用实验方法对列车动荷载作用下包兰线路基粉质土在开敞、封闭系统下的冻胀特性进行模拟。

Our country firstly put forward such design principle of Qinghai-Tibet railway engineering as "lower temperature actively, reduce the heat into the subsoil, and assure the heat stability of frozen earth for the quality stability of construction", creatively adopt such corresponding measures of frozen earth construction problem as: for the poor frozen earth developing section, line should avoid as possible;for the geology of ice at high temperature and unstable frozen earth zone, the method of bridge instead of subgrade shall be adopted;in subgradeconstruction, such facilities as heat stick, rubble ventilation subgrade , rubble ventilation berm, ventilation pipe subgrade and laying heat preservation board etc shall be adopted to raise the stability of frozen earth subgrade;during the excavation of bridge, culvert , foundation pit and scouring prevention trough, creatively adopt single-tooth knapper and solve the problem of frozen earth excavation;during the construction of bridge and culvert, durable concrete and three-step maintenance method are adopted to assure the outside and inside beauty of structure.

我国在世界上首次提出"主动降温、减少传入地基土的热量、保证多年冻土的热稳定性,从而保证修筑在上面的工程质量的稳定性"的青藏铁路工程设计原则,创造性地采取了解决冻土施工难题的相应对策:对于不良冻土现象发育地段、线路尽量绕避;对于高温极不稳定冻土区的高含冰量地质,采取"以桥代路"的办法;在路基施工中采用了热棒、片石通风路基、片石通风护道、通风管路基、铺设保温板等多项设施,提高冻土路基的稳定性;在桥涵基坑、挡水埝基槽开挖中,创造性地应用了单齿破碎器,解决了冻土开挖难题;在桥涵工程施工中,采用了耐久性混凝土,采用了三步养生法,保证了结构物内实外美。

The results show that the vehicle acceleration, the dynamic wheel load and offload factors increase with train speed, and distribute linearly. The safety of train operation and running comfort can meet the requirements when the high-speed train under secondary suspension passing through ballasted track subgrade structure. The dynamic displacement of the system is less influenced by train speed. The dynamic stress of subgrade surface increases with speed improving, and it is distributed as saddle along the lateral direction and as parabola along the longitudinal direction of subgrade surface. The dynamic stress of subgrade declines sharply along the depth of subgrade. The dynamic stress on 3 m depth below subgrade bed surface is about 16 percent of that of subgrade surface.

结果表明:车体加速度、动轮载和轮重减载率均随车速的提高而增大,呈线性分布;具有二系悬挂的高速列车通过有砟轨道路基结构时,列车的安全性及舒适度均能满足要求;系统动位移受速度影响较小;路基面动应力随速度的提高而增大,并在横向呈马鞍形分布,在纵向呈抛物线形分布;路基动应力沿路基深度方向衰减较快,在基床表面下3 m处,动应力只有基面的16%左右。

Based on them, distribution laws of subgrade temperature field under fluctuant boundary temperature cycle conditions are analyzed, and different ratios of slope for general subgrade and different status when there are or not banquettes are compared by laboratory simulation and numerical analysis; thermal insulation and cooling effect of thermal insulation slab, broken stone and non-power heat pipes is respectively investigated under the trend of elevated temperature by numerical analysis, laws of subgrade deformation are predicted under the trend of elevated temperature and influences of subgrade thaw settlement on pavement stress are studies by numerical computation for observation data of representative road sections selected.

为研究青藏公路冻土病害处治对策,从青藏公路2002年~2004年冻土病害整治工程实际出发,在系统分析研究青藏公路病害及发生机理的基础上,运用室内模拟试验、数值分析方法,依托处治冻土病害路段实际使用的隔热板路基、碎石路基、无动力热棒路基等进行现场试验,分析边界温度周期波动条件下的路基温度场分布规律,同时进行一般路基不同边坡坡率的对比研究及有无护坡道的对比研究;运用数值分析方法,对气温升高趋势下隔热板、碎石、无动力热棒的隔热降温效果进行了研究;选择代表性路段观测资料,运用数值计算的方法,进行升温趋势下的路基变形预测,研究路基融沉变形对路面应力的影响。

When the subgrade deflects beneath a rigid pavement,the concrete slab is able to bridge over localezed failures and areas of inadequate suport because of its rigidity and high modulus of elasticity.

subgrade 使在之下偏斜硬的人行道的 1.When,具体的平板能够因为它的弹力硬和高的率超过不充分的 suport 的 localezed 失败和克服。

The subgrade damages are divided into two-types: high subgrade and low subgrade damages. High subgrade damages of which are related to the embankment height and slope directions maily include longitudinal cracks and subgrade cracks. The higher of the embankment height, the greater of the happening rate. The mechanisms of high subgrade damages formation are analyzed by the observed dates of soil temperature within the embankment and damages survey. In warm permafrost regions, the damages are mainly caused by the formation and development of the thaw bulb and thaw layer. In cold permafrost regions, the damages are mainly caused by frozen bulges.

围绕这些病害特征及形成过程,提出了将多年冻土区填土路基病害分为低路基病害与高路基病害,目前青藏公路路基的病害形式主要表现为以纵向裂缝与路基开裂为主的高路基病害,并提出了高路基病害与路基高度及坡向直接相关,路基高度越高,高路基病害发生的几率越大;通过对高路基地温观测数据的分析,并结合高路基病害的调查结果,研究得出了不同地温区高路基病害的形成机理,提出高温冻土区主要是由于融化盘与融化夹层的形成与发展所引起的,低温冻土区主要是由于冻结核的形成与发展所引起的。

I selected a typical section to make a series of study, got the deformation trend and evolution regulation of subgrade from model experiment after the coal was mined which lie concealed in the subgrade, made evaluation with ration about influence of mining under subgrade using FLAC soft such as confirming the "ARC-BED"slide model and slip scope, calculated the F.S. of subgrade slope used limit equilibrium theory, and advance particular measure for the PingShuo Coal Mining Company.The engineer analyse of subgrade stability caused by karst cavity was relied on a collapse accident happened in ChangJin expressway.

文中先对所选取的代表性断面进行了模型试验,从直观上得到煤层开采后上部路基工程变形趋势及其发展规律;然后运用数值方法,定量评价了采动对路基及边坡的影响作,确定了路基边坡发生破坏的&圆弧—顺层&模式及范围,并运用极限平衡方法对边坡的安全性作出了评价,最后提出了具体的处治建议,为保证道路的正常营运与矿区安全生产提供了科学依据。

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