CAJ | 학술논문

利用云南东川蒋家沟泥石流的浆体流变实验数据，对现有流变参数计算公式进行优选，并分析了优选出的浆体流变参数计算式扩展到全粒径泥石流体的可行性。结果表明，Mooney公式和Krieger-Dougherty公式计算泥石流浆体的刚度系数精度较高，费祥俊公式和指数公式计算泥石流浆体的屈服应力精度较高；将这些公式应用于泥石流体时，对于密度较高的泥石流体不同公式的计算结果差异很大，总体而言费祥俊公式计算的屈服应力较为合理，对于黏性泥石流，利用浆体刚度系数并通过Krieger-Dougherty公式考虑粗颗粒影响的方法得到的刚度系数比较合理。本文的研究结果可以为泥石流动力学计算和防治工程设计提供参考。
이용운남동천장가구니석류적장체류변실험수거，대현유류변삼수계산공식진행우선，병분석료우선출적장체류변삼수계산식확전도전립경니석류체적가행성。결과표명，Mooney공식화Krieger-Dougherty공식계산니석류장체적강도계수정도교고，비상준공식화지수공식계산니석류장체적굴복응력정도교고；장저사공식응용우니석류체시，대우밀도교고적니석류체불동공식적계산결과차이흔대，총체이언비상준공식계산적굴복응력교위합리，대우점성니석류，이용장체강도계수병통과Krieger-Dougherty공식고필조과립영향적방법득도적강도계수비교합리。본문적연구결과가이위니석류동역학계산화방치공정설계제공삼고。
Rheological experimental data of debris-flow slurries composed of water and fine particles, and sampled from Jiangjia Gully of Yunnan Province,China,are analyzed in this paper. Then the data are em-ployed to test empirical formulas for rheological parameter estimation. Finally,the selected formulas that per-form well for the slurries are attempted to be applied to the whole debris-flow material, which consists of both slurry and coarser particles. The results show that Mooney’s formula and Krieger-Dougherty formula are the best for computing Bingham viscosity of debris-flow slurry,while Fei’s formula and the exponential formula are the best for yield stress. When these formulas are used to compute rheological parameters of the whole debris-flow material, the values of highly concentrated debris flow differ greatly. On the whole, yield stress values given by Fei’s formula are reasonable, while Bingham viscosity of viscous debris flows can be estimated with Bingham viscosity of the slurry united with the Krieger-Dougherty formula to take in-to account the effect of coarse particles. Results of this paper can provide reference for dynamics computa-tion and mitigation engineering design of debris flow.