本文選題：曲線頂管 + 地表變形�。� 參考：《隧道建設》2017年09期

【摘要】：為了研究曲線頂管施工引起的地表變形,通過分析拱北隧道管幕工程曲線頂管現(xiàn)場實測數(shù)據(jù),得出曲線頂管地表沉降槽的偏移曲線;在現(xiàn)有Peck和Loganathan地表變形計算公式的基礎上,考慮曲線頂管與隧洞的相對位置對沉降槽偏移量的影響,得出經(jīng)過沉降槽偏移修正的Peck和Loganathan地表變形預測公式。結(jié)果表明:1)曲線頂管施工引起的地表沉降槽曲線表現(xiàn)為非對稱,最大沉降點可能出現(xiàn)在軌跡彎曲內(nèi)側(cè),也可能偏向外側(cè);2)曲線頂管與隧洞相對位置引起的土體損失變化是造成沉降槽偏移的主要原因,相對位置與頂管穿越地層性質(zhì)、頂進力、注漿壓力和軌跡曲率半徑等因素有關;3)修正的Peck公式可以較好地反映砂層和淤泥質(zhì)土層中曲線頂管施工地面沉降槽偏移效應和最大沉降量。
[Abstract]:In order to study the surface deformation caused by curved pipe jacking, the migration curve of surface subsidence trough of curved pipe jacking is obtained by analyzing the measured data of curve jacking in Gongbei Tunnel, and based on the existing formulas for calculating surface deformation of Peck and Loganathan, Considering the influence of the relative position of the curved pipe jacking and the tunnel on the settlement channel migration, the prediction formulas of Peck and Loganathan surface deformation modified by the settlement trough migration are obtained. The results show that the curve of surface subsidence trough caused by the construction of curved pipe jacking is asymmetric, and the maximum settlement point may appear in the inner side of the trajectory bend. The change of soil loss caused by the relative position of the curve pipe jacking and the tunnel is the main cause of the deflection of the settlement trough, and the relative position and the jacking pipe pass through the stratum property, the jacking force, the relative position and the jacking pipe are the main causes of the displacement of the settlement trough. The modified Peck formula can well reflect the migration effect and maximum settlement amount of the ground subsidence trough in the curved pipe jacking construction in sand and silt soil.
【作者單位】： 中國地質(zhì)大學(武漢)工程學院;廣東省南粵交通投資建設有限公司;
【基金】：交通運輸部項目(201331J11300)
【分類號】：U456.3

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