本文選題：紅層泥巖　切入點(diǎn)：干濕循環(huán)　出處：《巖土力學(xué)》2017年07期 　論文類型：期刊論文

【摘要】：紅層泥巖受水的影響易誘發(fā)多種工程地質(zhì)災(zāi)害,開展紅層泥巖干濕循環(huán)崩解性質(zhì)的研究具有重要意義。選取三疊系巴東組(T2b4)紫紅色泥巖開展室內(nèi)干濕循環(huán)崩解試驗(yàn),每次干濕循環(huán)后篩分試樣,通過稱量獲得各組分質(zhì)量,并用圖像處理技術(shù)提取每次篩分后巖石塊體的形態(tài)特征參數(shù)。以此為基礎(chǔ)用分形幾何、灰色關(guān)聯(lián)理論研究紅層泥巖崩解過程中顆粒的分形與形態(tài)特征,從而建立評(píng)價(jià)紅層泥巖穩(wěn)定程度的模型。研究結(jié)果表明:巴東組紫紅色泥巖室內(nèi)干濕循環(huán)崩解試驗(yàn)中,粒徑大于10 mm的塊體崩解劇烈,且崩解過程主要集中在前8次循環(huán),經(jīng)歷12次循環(huán)后停止;崩解過程中紅層泥巖的分布分形維數(shù)在前8次循環(huán)中增加迅速,與紅層泥巖崩解程度的變化規(guī)律相對(duì)應(yīng),隨紅層泥巖停止崩解而穩(wěn)定在2.20;各粒組顆粒圓形度與覆蓋盒維數(shù)的變化特征與紅層泥巖崩解程度的變化規(guī)律也具有對(duì)應(yīng)關(guān)系,隨其崩解的停止而逐漸趨于穩(wěn)定;灰色關(guān)聯(lián)結(jié)果表明:崩解過程中紅層泥巖圓形度的變化特征能更好地反映其崩解的狀態(tài),對(duì)工程建設(shè)中紅層泥巖穩(wěn)定程度的評(píng)價(jià)具有一定的指導(dǎo)意義。
[Abstract]:Influenced by water, red mudstone can easily induce many kinds of engineering geological hazards. It is of great significance to study the dry and wet cycle disintegration properties of red layer mudstone. The burgundy mudstone of Padong formation of Triassic is selected to carry out indoor dry and wet cycle disintegration test. After each dry and wet cycle, the samples were screened, and the mass of each component was obtained by weighing, and the morphological characteristic parameters of the rock mass after each screening were extracted by image processing technique. Based on this, fractal geometry was used. The grey correlation theory studies the fractal and morphological characteristics of particles in the process of red mudstone disintegration, and establishes a model to evaluate the stability of red mudstone. The results show that: in the laboratory dry and wet cycle disintegration test of red mudstone in Badong formation, The disintegration of blocks with diameter larger than 10 mm is violent, and the disintegration process is mainly concentrated in the first 8 cycles, and stops after 12 cycles, and the fractal dimension of the distribution of red layer mudstone increases rapidly in the first 8 cycles. Corresponding to the regularity of the collapse degree of the red mudstone, it is stable at 2.20 with the red mudstone disintegrating, and the variation characteristics of the granularity roundness and the covering box dimension also have the corresponding relation with the change law of the red mudstone disintegration degree. The grey correlation results show that the variation characteristics of the roundness of red mudstone can better reflect the disintegration state of the red mudstone. It has certain guiding significance to evaluate the stability of red bed mudstone in engineering construction.
【作者單位】： 中國(guó)地質(zhì)大學(xué)(武漢)工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金重點(diǎn)項(xiàng)目(No.41230637) 國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(973計(jì)劃)項(xiàng)目(No.2011CB710606)~~
【分類號(hào)】：TU45

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