首页> 外文期刊>Journal of geotechnical and geoenvironmental engineering >Semiempirical Method for Estimation of Pullout Capacity of Grouted Soil Nails in Saturated and Unsaturated Soil Environments
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Semiempirical Method for Estimation of Pullout Capacity of Grouted Soil Nails in Saturated and Unsaturated Soil Environments

机译:饱和和非饱和土壤环境中注浆土钉抗拔能力的半经验估计

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摘要

The design of soil nail systems used in engineering practice is either based on conventional soil mechanics or empirical procedures, and generally ignores the influence of matric suction. An experimental program was conducted to investigate the influence of matric suction on the pullout capacity of soil nails installed in compacted sand under both saturated and unsaturated conditions. Pullout tests were performed on soil nails installed vertically, horizontally, and at an inclination of 15° to the vertical in a specially designed test box. A strong relationship was observed between the pullout capacity and matric suction. A semiempirical method is proposed for the estimation of the pullout capacity of soil nails by using the average matric suction value and the saturated soil strength parameters, c'_a and δ. There is a reasonably good agreement between the measured and estimated pullout capacity of soil nails using the results of the present research program as well as the data from the literature.
机译:工程实践中使用的土钉系统设计是基于常规的土力学或经验方法,通常忽略了基质吸力的影响。进行了一个实验程序,以研究在饱和和非饱和条件下,基质吸力对安装在压实砂土中的土钉的抗拔能力的影响。在专门设计的测试箱中,对垂直,水平和相对于垂直线倾斜15°安装的土壤钉子进行拉拔测试。观察到拔出能力和基质吸力之间有很强的关系。提出了一种半经验方法,通过使用平均基质吸力值和饱和土强度参数c'_a和δ估算土钉的抗拔能力。使用本研究程序的结果以及来自文献的数据,在测得的和估计的土钉的拔出力之间有相当好的一致性。

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