【摘要】：針對(duì)地鐵循環(huán)荷載作用下飽和粉性土的變形特性,對(duì)上海地鐵10號(hào)線國(guó)權(quán)路站附近的飽和粉性土進(jìn)行GDS(Global Digital Systems)循環(huán)三軸試驗(yàn)。試驗(yàn)結(jié)果表明:動(dòng)應(yīng)力幅值和固結(jié)比一定,累積塑性應(yīng)變隨振動(dòng)頻率的增大而變小;固結(jié)比和振動(dòng)頻率一定時(shí),累積塑性應(yīng)變隨動(dòng)應(yīng)力幅值的增大而增大;動(dòng)應(yīng)力幅值和振動(dòng)頻率一定時(shí),累積塑性應(yīng)變隨固結(jié)比的增大而增大。通過(guò)正交表L_8(2~7)進(jìn)行安排試驗(yàn),同時(shí)借助編碼技術(shù)對(duì)變量進(jìn)行分析,得到隧道軸向變形的回歸方程,并考慮動(dòng)應(yīng)力幅值、固結(jié)比和振動(dòng)頻率等因素對(duì)回歸方程顯著性和失擬性進(jìn)行檢驗(yàn)。研究結(jié)果表明:該方程是可信的,影響地鐵隧道軸線變形的主要因素是動(dòng)應(yīng)力幅值,其次是頻率和固結(jié)比。研究成果對(duì)地鐵隧道設(shè)計(jì)具有參考價(jià)值。
[Abstract]:According to the deformation characteristics of saturated silt under cyclic loading of subway, the saturated silt near Guoquan Road Station of Shanghai Metro Line 10 was tested by GDS (Global Digital Systems) cyclic triaxial test. The experimental results show that the cumulative plastic strain decreases with the increase of the vibration frequency, and the cumulative plastic strain increases with the increase of the amplitude of the dynamic stress when the consolidation ratio and the vibration frequency are constant. When the amplitude of dynamic stress and vibration frequency are constant, the cumulative plastic strain increases with the increase of consolidation ratio. Through orthogonal table L8 (2 / 7) to arrange the experiment, at the same time, with the help of coding technology to analyze the variables, the regression equation of tunnel axial deformation is obtained, and the amplitude of dynamic stress is taken into account. Factors such as consolidation ratio and vibration frequency are used to test the significance and unfitness of the regression equation. The results show that the equation is credible and the main factors affecting the deformation of the subway tunnel axis are the amplitude of dynamic stress followed by the frequency and consolidation ratio. The research results have reference value for subway tunnel design.
【作者單位】： 安陽(yáng)工學(xué)院土木與建筑工程學(xué)院;同濟(jì)大學(xué)地下與建筑工程系;
【基金】：河南省科技計(jì)劃重點(diǎn)攻關(guān)資助項(xiàng)目(152102310204,132102310334) 河南省高校2016年重點(diǎn)科研資助項(xiàng)目(16B560001) 大學(xué)生科技創(chuàng)新資助項(xiàng)目
【分類號(hào)】：U231.1;U452.11

【相似文獻(xiàn)】

相關(guān)期刊論文 前3條

1 吳敏哲;張柯;胡衛(wèi)兵;楊玉東;常玉珍;王鑫;;地鐵行車荷載作用下飽和黃土的累積塑性應(yīng)變[J];西安建筑科技大學(xué)學(xué)報(bào)(自然科學(xué)版);2011年03期

2 張勇;孔令偉;郭愛(ài)國(guó);李雄威;;循環(huán)荷載下飽和軟黏土的累積塑性應(yīng)變?cè)囼?yàn)研究[J];巖土力學(xué);2009年06期

3 白顥;孔令偉;;固結(jié)比對(duì)石灰土動(dòng)力特性的影響試驗(yàn)研究[J];巖土力學(xué);2009年06期

相關(guān)碩士學(xué)位論文 前1條

1 馬國(guó)茂;高鐵車體結(jié)構(gòu)件應(yīng)力分析與疲勞強(qiáng)度評(píng)估[D];東北大學(xué);2014年

，

本文編號(hào)：2303819