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首页> 外文会议>GeoShanghai International Conference; 20060606-08; Shanghai(CN) >Measurement of Small-Strain Modulus of Gravelly Soils Using Oedometer Equipped with Piezoelectric Sensors
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Measurement of Small-Strain Modulus of Gravelly Soils Using Oedometer Equipped with Piezoelectric Sensors

机译：配备压电传感器的里程表测量砾石土壤的小应变模量

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摘要

Small-strain modulus of soils is a very important parameter in geotechnical engineering. However, complexities in performing conventional tests and the high cost of testing system have prevented it from becoming a routine test for gravelly soils commonly used in pavement construction. Therefore, development of an alternative, simple and reliable testing technique is essential to the application of the mechanistic design for a flexible pavement system. In this paper, a technique has been developed using a large oedometer equipped with piezoelectric sensors. Elastic moduli and Poisson's ratio of gravelly soils were determined under cyclic loading conditions, for three soil specimens with varying percentage of gravel. It is found that there is considerable variation in the modulus values with different gravel contents. The influence of confining pressure and number of stress cycles is investigated. The experimental results are compared with several empirical formulae widely used to estimate the elastic modulus of gravel and sand.
机译：土壤的小应变模量是岩土工程中非常重要的参数。但是，执行常规测试的复杂性和测试系统的高昂成本使其无法成为路面施工中常用的砾石土的常规测试。因此，开发一种替代的，简单而可靠的测试技术对于柔性路面系统机械设计的应用至关重要。在本文中，已经开发了一种使用配备了压电传感器的大型里程表的技术。在循环荷载条件下，对三种砾石百分比不同的土样，测定了砾石土的弹性模量和泊松比。发现在不同的砾石含量下模量值有很大的变化。研究了围压和应力循环次数的影响。将实验结果与广泛用于估算砾石和沙子的弹性模量的几个经验公式进行比较。

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