| 铁路路基基底面动态压力的概率抽样测定法及其应用 |
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| 引用本文： | 王绳祖,张宗淳.铁路路基基底面动态压力的概率抽样测定法及其应用[J].岩土力学,1988,9(1):37-43. |
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| 作者姓名： | 王绳祖 张宗淳 |
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| 作者单位： | 国家地震局地质研究所； 北京； |
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| 摘 要： | 在铁路路基稳定性长期监测研究中,要求埋设于路堤之下的压力盒具备耐久、可靠、可供长期使用的特点。钢弦式压力盒适用于长期使用,但通常被认为无法用于动态压力测量。本文提出的概率抽样测定法比较成功地解决了钢弦式压力盒对于列车通过时基底面动态压力测定的问题。根据随机抽样和概率论原理,通过对列车动载的多次测量,可绘制出基底面的压力分布概率曲线(频数分布曲线),近似地表示动态压力的空间分布状况。上述原理和方法,在青藏铁路盐湖地区路基稳定性的研究中得到了实际应用和检验。
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Probability-sampling Measurement and Its Application to Dynamic Pressure on Railway Subbase surface |
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| Wang Shengzu,Zhang Zongchun.Probability-sampling Measurement and Its Application to Dynamic Pressure on Railway Subbase surface[J].Rock and Soil Mechanics,1988,9(1):37-43. |
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| Authors: | Wang Shengzu Zhang Zongchun |
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| Institution: | Institute of Geology,State Seismological Bureau,Beijing |
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| Abstract: | The pressure cell installed under road is required to have the properties of durability and reliability for long-term usage. Usually it is considered unable to measure dynamic pressure, the distribution of dynamic pressures on railway subbase surface excited by train can be measured by the string-type pressure cells with a frequency detector by means of the probability-sampling method suggested in this paper. According to the philosophy of probability-sampling the probabilistic distribution (frequency distribution) curves of dynamic pressures are plotted to show the dynamic pressure distribution along the longitudinal direction of the railway approximately. The principle and method were successfully used and examined in the research on long-term monitoring of subgrade stability of the Qinghai-Tibet Railway in the Qarhan Salt-Lake region. |
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