發(fā)布時間：2018-03-19 20:49

  本文選題：雙側(cè)壁導(dǎo)坑法　切入點：大斷面中隔墻　出處：《隧道建設(shè)》2017年09期 　論文類型：期刊論文

【摘要】：為了便于盾構(gòu)過站施工連續(xù),保證施工安全,以重慶軌道交通環(huán)線上橋車站工程為依托,對雙側(cè)導(dǎo)洞先行貫通、中隔墻后續(xù)開挖的雙側(cè)壁導(dǎo)坑工法進(jìn)行分析,并研究臨時中隔墻巖柱開挖的穩(wěn)定性和加固措施,形成臨時中隔墻巖柱開挖的施工關(guān)鍵技術(shù)。分析結(jié)果表明,在雙側(cè)導(dǎo)洞貫通后、中隔墻巖柱開挖前,隧道已經(jīng)發(fā)生較大的拱頂沉降和收斂變形。為保證中隔墻巖柱開挖的穩(wěn)定性和控制隧道變形,先對隧道及中隔墻進(jìn)行加固,然后采用分臺階開挖施工。中隔墻拱部采用鎖腳錨桿和增加中隔墻臨時支撐體系剛度有助于改善初期支護(hù)的受力模式和控制隧道的收斂變形。
[Abstract]:In order to facilitate the continuous construction of shield tunneling station and ensure the construction safety, based on the Shangqiao Station Project of Chongqing Rail Transit Ring Line, this paper analyzes the double-side tunnel construction method for the first through of the double-side guide tunnel and the follow-up excavation of the middle partition wall. The stability and reinforcement measures of the temporary middle wall rock column excavation are studied, and the key construction technology of the temporary middle partition wall rock column excavation is formed. The analysis results show that before the middle partition wall rock column is excavated, In order to ensure the stability of rock column excavation and control the deformation of tunnel, the tunnel and the middle partition wall are strengthened first. Then step excavation is adopted in the middle partition wall arch with locking anchor bolt and increasing stiffness of temporary supporting system of middle partition wall which is helpful to improve the stress mode of initial support and control the convergent deformation of tunnel.
【作者單位】： 中交隧道工程局有限公司;
【分類號】：U231.3;U455.4

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本文編號：1635941