本文選題：寬級(jí)配弱固結(jié)土 + 細(xì)顆粒遷移��； 參考：《山地學(xué)報(bào)》2017年02期

【摘要】：寬級(jí)配弱固結(jié)土體中細(xì)顆粒的遷移是導(dǎo)致滑坡和泥石流的一個(gè)重要原因。本文總結(jié)了寬級(jí)配弱固結(jié)土和細(xì)顆粒分界粒徑的基本概念,以及細(xì)顆粒遷移特性,并總結(jié)了現(xiàn)有細(xì)顆粒遷移在各學(xué)科研究的實(shí)驗(yàn)方法、數(shù)值模擬方法以及研究成果�，F(xiàn)有研究表明在宏觀尺度上,寬級(jí)配土體內(nèi)細(xì)顆粒在水動(dòng)力條件下的遷移,會(huì)導(dǎo)致土體孔隙堵塞,是土體滲透性的降低、發(fā)生滑坡泥石流的重要原因;同時(shí)亦影響水利科學(xué)中土石壩運(yùn)行,甚至造成管涌破壞。在細(xì)觀尺度上,相關(guān)成果仍舊不完善,亟待在今后進(jìn)行深入研究。未來建議重點(diǎn)發(fā)展微觀數(shù)值模擬技術(shù),高精度的試驗(yàn)監(jiān)測手段,并考慮孔隙結(jié)構(gòu)和顆粒級(jí)配變化、細(xì)觀-微觀-宏觀多尺度轉(zhuǎn)換以及氣、固、流多相流耦合條件下的細(xì)顆粒遷移規(guī)律。
[Abstract]:The migration of fine particles in wide gradation weakly consolidated soil is an important cause of landslide and debris flow. In this paper, the basic concepts of wide gradation weakly consolidated soil and fine particle boundary particle size, as well as the characteristics of fine particle migration are summarized, and the experimental methods, numerical simulation methods and research results of fine particle migration in various disciplines are summarized. The existing studies show that the migration of fine particles in the wide gradation soil under hydrodynamic conditions will lead to soil pore blockage, which is an important reason for the decrease of soil permeability and the occurrence of landslide and debris flow. At the same time, it also affects the operation of earth-rock dams in water conservancy science, and even causes pipeline failure. In the meso scale, the related results are still imperfect, and need to be further studied in the future. In the future, it is suggested that emphasis should be placed on the development of microscopic numerical simulation techniques, high-precision test and monitoring methods, taking into account changes in pore structure and particle gradation, meso-micro-macro multi-scale conversion, and gas, solid, etc. The migration of fine particles under the coupling condition of multiphase flow.
【作者單位】： 中國科學(xué)院山地災(zāi)害與地表過程重點(diǎn)實(shí)驗(yàn)室中國科學(xué)院水利部成都山地災(zāi)害與環(huán)境研究所;中國科學(xué)院大學(xué);中國科學(xué)院青藏高原地球科學(xué)卓越創(chuàng)新中心;
【基金】：中科院國際合作局對(duì)外合作重點(diǎn)項(xiàng)目(131551KYSB20160002) 國家科技支撐項(xiàng)目(2014BAL05B01) 國際(地區(qū))合作與交流項(xiàng)目(41520104002)~~
【分類號(hào)】：P642.2;TU43

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