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standard frost
相关语句
  标准冻深
     The prediction of standard frost of foundation soil in northern area
     北方地区基土标准冻深的预报
短句来源
     According to the statistics about standard frost of the seasonal frozen soil area in China, it founds the relative mathematic model of standard frost and freezing index of the seasonal frozen soil area by the method on monadic regression analysis.
     以我国季节冻土区关于标准冻深的统计资料为依据,用一元回归分析的方法建立季节冻土区黏性土标准冻深与冻结指数的相关关系的数学模型。
短句来源
     Through the processing in computer, it selects the best fitting curve, and predicts the standard frost of other areas. Comparing with the calculative formula of standard frost in ″Canal Engineering Anti-rost Heaving Projection Standard″, it increases the prediciable degree of accuracy and identificates the practicability of model.
     经过计算机处理,选出最佳拟合曲线,预测其它地区的标准冻深,并与现行《渠系工程抗冻胀设计规范》中的标准冻深计算公式(1)作了对比,提高了预报精度,验证了模型的实用性。
短句来源
  相似匹配句对
     Standard
     标准
短句来源
     Which is the standard?
     采用什么标准评价?
短句来源
     The Frost
     霜
短句来源
     Frost and H. C.
     C.
短句来源
     The prediction of standard frost of foundation soil in northern area
     北方地区基土标准冻深的预报
短句来源
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  standard frost
A standard Frost >amp; Sullivan report costs on average USD3,000.
      


According to the statistics about standard frost of the seasonal frozen soil area in China, it founds the relative mathematic model of standard frost and freezing index of the seasonal frozen soil area by the method on monadic regression analysis. Through the processing in computer, it selects the best fitting curve, and predicts the standard frost of other areas. Comparing with the calculative formula of standard frost in ″Canal Engineering Anti-rost Heaving Projection Standard″,...

According to the statistics about standard frost of the seasonal frozen soil area in China, it founds the relative mathematic model of standard frost and freezing index of the seasonal frozen soil area by the method on monadic regression analysis. Through the processing in computer, it selects the best fitting curve, and predicts the standard frost of other areas. Comparing with the calculative formula of standard frost in ″Canal Engineering Anti-rost Heaving Projection Standard″, it increases the prediciable degree of accuracy and identificates the practicability of model.

以我国季节冻土区关于标准冻深的统计资料为依据,用一元回归分析的方法建立季节冻土区黏性土标准冻深与冻结指数的相关关系的数学模型。经过计算机处理,选出最佳拟合曲线,预测其它地区的标准冻深,并与现行《渠系工程抗冻胀设计规范》中的标准冻深计算公式(1)作了对比,提高了预报精度,验证了模型的实用性。

A power plant in northern China has the installed capacity of 2 × 350 MW with two heightened 3 000 m2 natural draft cooling towers.The foundation type is ring flat-plate with the average pressure intensity at the foundation bottom of over 220 kPa.The ring flat-plate type foundation is located on silty clay layer with the bearing force of 140 kPa.The subjacent bed is silt with the bearing force value of 200 kPa.The saturated silt can be found at 20.00 m deep underground and will not be liquefied at seismic intensity...

A power plant in northern China has the installed capacity of 2 × 350 MW with two heightened 3 000 m2 natural draft cooling towers.The foundation type is ring flat-plate with the average pressure intensity at the foundation bottom of over 220 kPa.The ring flat-plate type foundation is located on silty clay layer with the bearing force of 140 kPa.The subjacent bed is silt with the bearing force value of 200 kPa.The saturated silt can be found at 20.00 m deep underground and will not be liquefied at seismic intensity of Ⅷ degree.The site earth is Grade Ⅱ with the standard frost depth of 0.80 m,seismic dynamic peak load acceleration of 0.20 g and buried depth of underground water level of 8.00 m,having no corrosive effect on ordinary concrete but having corrosive effect on the steel structure and reinforced bars in the reinforced concrete structure.Since the cooling towers are located near a swimming pool reconstructed from a fish pool,affected by long-term leakage,the base earth is medium-high compression one that cannot satisfy the requirement of natural foundation.Through the technically economical comparison,it is decided that cement fly ash pile compound foundation be adopted.

华北某发电工程规划容量2×350 MW,冷却设备为2座加高型3 000 m2自然通风冷却塔,采用环板式基础型式,基底的平均压强可达220 kPa以上,环板基础坐落在粉质粘土层,承载力特征值为140 kPa,下卧层为粉土,承载力特征值为200 kPa。地面下20.00 m深度内存在饱和粉土层,初步判别在地震基本烈度为Ⅷ度时不液化,该场地土为Ⅱ类,土壤标准冻结深度为0.80 m,地震动峰值加速度为0.20 g,地下水位埋深8.00 m左右,对普通混凝土无腐蚀性,对钢结构及钢筋混凝土结构中钢筋具有弱腐蚀性。由于冷却塔所在位置原为养鱼池后改建为游泳池,受长期渗漏影响,基底土层普遍为软塑状态,属于中等至高压缩性土,不能满足天然地基的要求。经过技术经济比较,确定采用水泥粉煤灰桩复合地基。

There are serious frost heave diseases on the surface layer of railway subgrade in permafrost regions of China and there are no corresponding standards for frost heave classification of railway subgrade filling material in China.The characteristics of subgrade frost heave,the factors influencing subgrade frost heave,and the problems in the treatment of frost heave diseases are analyzed.On this basis,frost heave classification of railway subgrade filling material is presented and subgrade anti-freezing layer...

There are serious frost heave diseases on the surface layer of railway subgrade in permafrost regions of China and there are no corresponding standards for frost heave classification of railway subgrade filling material in China.The characteristics of subgrade frost heave,the factors influencing subgrade frost heave,and the problems in the treatment of frost heave diseases are analyzed.On this basis,frost heave classification of railway subgrade filling material is presented and subgrade anti-freezing layer is suggested to be built in permafrost regions by borrowing domestic and foreign ideas of frost heave classifications for foundation soil,according to the characteristics of railway subgrade filling material classification,the limit depth of frost heave and the criterion of maintenance for railway track.The new frost heave classification for subgrade filling material is divided into two levels,which are frost heave sensitivity and frost heave rate,according to such indexes as fine granule contents of soil,pre-freeze water content in soil and frost heave depth.Non-frost-heave soil such as sand with fine granule content less than 5%,gravel with fine granule content less than 15% and crushed rock can be used to build the anti-freezing layer of subgrade.The thickness of the anti-freezing layer will be decided by the standard frost depth of subgrade,the running speed and the loading capacity of train.

我国冻土区铁路路基表层的冻胀病害严重,且没有相应的路基填料冻胀性分类标准。在分析路基的冻胀特性、影响路基冻胀的因素、路基冻害整治中存在的问题的基础上,借鉴国内外地基土的冻胀性分类,并结合铁路路基填料分类的特点、铁路线路冻胀限高和维修标准,提出铁路路基填料冻胀性分类方案,并建议在冻土区设置路基防冻层。路基填料冻胀性分类方案以各类土的细粒含量、冻前含水量和冻胀高度为指标,进行冻胀敏感性和冻胀等级两级分类。路基防冻层应用细粒含量<5%的砂类和细粒含量<15%的砾类、碎石类不冻胀土填筑,防冻层的厚度根据路基的标准冻深。列车的运行速度和载重量确定。

 
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