本文選題：全斷面隧道掘進(jìn)機(jī)(TBM) + 尺寸效應(yīng)　； 參考：《同濟(jì)大學(xué)學(xué)報(bào)(自然科學(xué)版)》2017年10期

【摘要】：為了給室內(nèi)模型試驗(yàn)或數(shù)值模擬試驗(yàn)提供直接的指導(dǎo)及實(shí)際工程間接的參考,將基于微觀膠結(jié)試驗(yàn)得到的合理的巖石微觀力學(xué)模型植入離散元軟件,模擬了不同試樣尺寸滾刀破巖過(guò)程并分析了各因素對(duì)滾刀破巖過(guò)程的影響.結(jié)果表明,不同試樣尺寸滾刀破巖過(guò)程按破巖阻力和侵入深度的關(guān)系均可以分為3個(gè)階段,即加載階段、卸載階段和殘余躍進(jìn)階段;室內(nèi)模型試驗(yàn)中,滾刀刃寬與巖石試樣寬度的比值(相對(duì)比值)存在一個(gè)臨界值,當(dāng)試驗(yàn)中選取的相對(duì)比值小于該臨界值時(shí),可以減小試驗(yàn)過(guò)程中的邊界效應(yīng).
[Abstract]:In order to provide direct guidance for indoor model test or numerical simulation test and indirect reference for practical engineering, a reasonable rock micromechanical model based on micro cementation test was implanted into the discrete element software, the rock breaking process of different specimen size hob was simulated and the effect of various factors on the rock breaking process of the hob was analyzed. It is clear that the rock breaking process of different size hob can be divided into 3 stages according to the relationship between the rock breaking resistance and the penetration depth, that is, the loading stage, the unloading stage and the residual leap stage. In the indoor model test, there is a critical value in the ratio (relative ratio) of the width of the blade and the width of the rock specimen. The critical effect can reduce the boundary effect during the test.

【作者單位】： 同濟(jì)大學(xué)土木工程防災(zāi)國(guó)家重點(diǎn)實(shí)驗(yàn)室;同濟(jì)大學(xué)巖土及地下工程教育部重點(diǎn)實(shí)驗(yàn)室;上海理工大學(xué)環(huán)境與建筑學(xué)院;
【基金】：國(guó)家“九七三”重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(2011CB013504,2014CB046901)
【分類(lèi)號(hào)】：U455.31
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本文編號(hào)：1811499