黄土坡滑坡滑带土的蠕变特性研究

汪斌, 朱杰兵, 唐辉明, 项伟

长江科学院院报 ›› 2008, Vol. 25 ›› Issue (1) : 49-52.

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PDF(1151 KB)
长江科学院院报 ›› 2008, Vol. 25 ›› Issue (1) : 49-52.
岩土工程

黄土坡滑坡滑带土的蠕变特性研究

  •  汪斌, 朱杰兵, 唐辉明, 项伟
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Study on Creep Behavior of Slip Band Soil of Huangtupo Landslide

  •  WANG  Bin, ZHU  Jie-Bing, TANG  Hui-Ming, XIANG  Wei
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摘要

为了研究黄土坡滑坡滑带土的蠕变特性和长期强度,进行了室内流变试验。试验表明,滑带土具有较强的流变特性。基于非线性Boltzmann迭加原理处理的蠕变曲线簇具有很好的相似性。并根据蠕变试验成果,建立了反映滑带土蠕变特性的Burgers蠕变模型,进行了定常Burgers蠕变模型的参数辨识。最后,比较了滑带土的长期强度包线与峰值强度包线,结果表明,长期强度要比相应的应力状态下的峰值强度减少30%左右。

Abstract

In order to research the rheological characteristics and long term strength of Huangtupo landslides deep slip band soil, the creep tests were carried out. The test results validated that the slip band soil possesses obvious creep characteristic.And the creep curve clusters based on nonlinear Boltzmann superposition principle have good similarity. According to the results of creep test, the Burgers creep model which can reflect the creep behaviors of slip band soil is established. And constant parameters of the model are recognized. In the end, the envelopes of long-term strength and peaking strength are compared, from which it can come the conclusion that the long term strength may decrease 30% than the peaking strength under the same stress level.

关键词

滑带土 / 蠕变模型 / 蠕变特性 / 长期强度

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汪斌, 朱杰兵, 唐辉明, 项伟. 黄土坡滑坡滑带土的蠕变特性研究[J]. 长江科学院院报. 2008, 25(1): 49-52
WANG Bin, ZHU Jie-Bing, TANG Hui-Ming, XIANG Wei. Study on Creep Behavior of Slip Band Soil of Huangtupo Landslide[J]. Journal of Changjiang River Scientific Research Institute. 2008, 25(1): 49-52

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