本文關(guān)鍵詞： 盾構(gòu)隧道 接頭剛度等效 修正計(jì)算 影響因素 數(shù)值計(jì)算 實(shí)例分析　出處：《鐵道科學(xué)與工程學(xué)報(bào)》2017年07期 　論文類(lèi)型：期刊論文

【摘要】：管片環(huán)向接頭等效剛度是盾構(gòu)隧道縱向設(shè)計(jì)的關(guān)鍵參數(shù)。為此,建立盾構(gòu)管片三維精細(xì)數(shù)值模型,計(jì)算分析等效接頭剛度與實(shí)際螺栓接頭剛度的偏差,引入等效剛度修正系數(shù)η;探討剛度修正系數(shù)的影響因素,提出等效剛度修正計(jì)算公式,并應(yīng)用于工程實(shí)例。研究結(jié)果表明:盾構(gòu)隧道縱向計(jì)算中用等效螺栓環(huán)表征實(shí)際接頭存有不容忽視的誤差;螺栓型式影響實(shí)際點(diǎn)狀分布接頭剛度,導(dǎo)致不同螺栓型式等效剛度最大相差10.5%;螺栓數(shù)量對(duì)等效剛度影響明顯,等效剛度隨實(shí)際螺栓數(shù)量的增加近似線性增大;外部擾動(dòng)水平不高時(shí),對(duì)剛度等效影響很小,不會(huì)放大螺栓剛度等效引起的誤差;實(shí)例計(jì)算中等效剛度修正前后位移計(jì)算結(jié)果與實(shí)測(cè)值誤差分別為31.9%和9.6%,說(shuō)明接頭等效剛度修正計(jì)算方法更具合理性。
[Abstract]:The equivalent stiffness of segment ring joint is the key parameter in the longitudinal design of shield tunnel. Therefore, a three-dimensional fine numerical model of shield segment is established, and the deviation between equivalent joint stiffness and actual bolted joint stiffness is calculated and analyzed. The effective stiffness correction coefficient 畏 is introduced, the influencing factors of stiffness correction coefficient are discussed, and the calculating formula of equivalent stiffness correction is put forward. The results show that there are some errors which can not be ignored in the longitudinal calculation of shield tunnel by using equivalent bolt ring to characterize the actual joint, and the bolt type affects the stiffness of the actual point distribution joint. As a result, the maximum difference of equivalent stiffness of different bolt types is 10.5%, the number of bolts has obvious influence on the equivalent stiffness, and the equivalent stiffness increases linearly with the increase of the actual number of bolts; when the external disturbance level is not high, the effect on the equivalent stiffness is very small. The error caused by equivalent stiffness of bolts will not be magnified, and the calculated results of displacement before and after the equivalent stiffness correction and the error of measured values are 31.9% and 9.6, respectively, which shows that the calculation method of equivalent stiffness correction for joints is more reasonable.
【作者單位】： 廣州市市政工程設(shè)計(jì)研究總院;華南理工大學(xué)土木與交通學(xué)院;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51508119)
【分類(lèi)號(hào)】：U455.43
，

本文編號(hào)：1495430