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公路隧道近距離上跨鐵路隧道爆破施工研究

作者：楊興寶

作者簡介：

楊興寶，高級(jí)工程師，項(xiàng)目經(jīng)理，E?mail:2295004199@qq. com

作者單位：

中交路橋華北工程有限公司，北京 101102

摘要：

以新建首環(huán)高速公路承平段 TJ2 標(biāo)大鹿圈 1 號(hào)隧道為例，研究新建公路隧道近距離上跨既有高速鐵路隧道爆破施工影響，并介紹新建隧道拱部光面爆破、墻部預(yù)裂爆破的微振綜合控制爆破技術(shù)及爆破振動(dòng)控制措施。研究結(jié)果表明，大鹿圈 1 號(hào)隧道施工引起的既有平安堡隧道主體結(jié)構(gòu)與軌道結(jié)構(gòu)位移和應(yīng)力變化主要發(fā)生在兩隧道交叉段正上方附近施工期，且平安堡隧道主體結(jié)構(gòu)和軌道結(jié)構(gòu)變形與受力均處于安全范圍內(nèi)。

關(guān)鍵詞：隧道；爆破；開挖；受力；變形

English：

Taking the Daluquan No. 1 Tunnel of TJ2 section in the Chengde to Pinggu District, Beijingsection of the Capital Ring Expressway as an example, the influence of blasting construction of the newhighway tunnel on the existing high?speed railway tunnel is studied, and the micro?vibrationcomprehensive control blasting technology of the new tunnel arch smooth blasting and wall pre?splittingblasting, and blasting vibration control measures are introduced. The research results show that thedisplacement and stress changes of the main structure and track structure of the existing Ping’ anpuTunnel caused by the construction of Daluquan No. 1 Tunnel mainly occur in the construction period nearthe intersection of the two tunnels, and the deformation and stress of the main structure and trackstructure of the Ping’ anpu Tunnel are within the safe range.

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