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首页> 外文会议>Cold regions engineering 2009 : Cold regions impact on research, design, and construction >Characterizing the Strength Layering of Freezing Ground
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Characterizing the Strength Layering of Freezing Ground

机译：表征冻土的强度分层

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A test section was constructed for vehicle testing on frozen soils having overall dimensions of 6 m (20 ft) wide by 32 m (105 ft) long. The section had three test cells. Each test cell was approximately 7.6 m (35 ft) long by 6 m (20 ft) wide, and contained one of three different soils: clay (CL), silt (ML) and silty sand (SM). The test soils were constructed and compacted in four 0.15-m (6-in.) lifts to a total depth of 0.6 m (24 in.). Each lift was compacted with a roller to a target density of approximately 90 to 95 percent of optimum compaction (CE12) to simulate a trafficked un-surfaced road or trail.rnVarious soil characterization tests were conducted during trafficking for monitoring the condition and homogeneity within each test soil. To characterize the test section, frost depth, soil strength, soil density, and soil moisture were measured and examined with several instruments or monitoring tools that worked well on frozen soils. This paper focuses on frost depth and soil strength measurements using various tools and relates the California Bearing Ratio (CBR) to the soil modulus (E or M_r) value using several existing correlations developed for various soil conditions.
机译：构造了一个测试区域，用于在总尺寸为6 m（20英尺）宽，32 m（105英尺）长的冰冻土壤上进行车辆测试。该部分具有三个测试单元。每个测试单元长约7.6 m（35英尺），宽6 m（20英尺），包含三种不同的土壤之一：粘土（CL），粉砂（ML）和粉砂（SM）。构造了测试土壤，并在四个0.15米（6英寸）的举升机中压实，使其总深度为0.6 m（24英寸）。每个举升机都用压路机压实至最佳压实度（CE12）的大约90％至95％的目标密度，以模拟被贩运的无表面道路或小径.rn在运输过程中进行了各种土壤特性测试，以监测每个卡车的状况和均质性测试土壤。为了表征测试部分，测量了霜冻深度，土壤强度，土壤密度和土壤湿度，并使用了在冻结土壤上工作良好的几种仪器或监测工具进行了检查。本文着重于使用各种工具测量霜冻深度和土壤强度，并使用针对各种土壤条件开发的几种现有相关性，将加利福尼亚承载比（CBR）与土壤模量（E或M_r）值相关联。

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