本文選題：隧道　切入點(diǎn)：下穿高速　出處：《華中科技大學(xué)學(xué)報(bào)(自然科學(xué)版)》2016年06期 　論文類(lèi)型：期刊論文

【摘要】：湘桂線(xiàn)石頭崗隧道下穿衡昆高速工程,在對(duì)85m超長(zhǎng)Φ159m大管棚內(nèi)力現(xiàn)場(chǎng)測(cè)試分析基礎(chǔ)上,建立精細(xì)化的數(shù)值模型對(duì)長(zhǎng)管棚作用機(jī)理進(jìn)行研究.提出管棚預(yù)支護(hù)結(jié)構(gòu)受力的縱向可按掌子面前方受拉段、掌子面后方受壓段、靠近洞口受拉段分為Ⅰ,Ⅱ,Ⅲ區(qū),其中:Ⅰ區(qū)呈凸起分布,峰值位于掌子面前方一定距離處;Ⅱ區(qū)為凹形分布,計(jì)算峰值位置滯后掌子面一定距離;Ⅲ區(qū)自洞口向內(nèi)呈逐步減小趨勢(shì),峰值位于洞口處.各區(qū)間長(zhǎng)度除Ⅰ區(qū)維持基本不變外,Ⅱ和Ⅲ區(qū)間長(zhǎng)度隨掌子面掘進(jìn)而增長(zhǎng);各區(qū)內(nèi)管棚受力也隨隧道掘進(jìn)而增長(zhǎng),且表現(xiàn)為先快后慢趨勢(shì).
[Abstract]:On the basis of field test and analysis of the force inside the 85-meter 桅 159m pipe shed, the Xiang-Gui Line Shihegang Tunnel undergoes Hengkun Expressway Project. A fine numerical model was established to study the action mechanism of long pipe sheds, and it was proposed that the longitudinal force of the pipe shed pre-supporting structure could be divided into 鈪，

本文編號(hào)：1627934