CAJ | 학술논문

以G217乔尔玛至那拉提公路玉溪莫勒盖隧道为依托，针对隧道出口段K723＋911～K723＋919坍方，从衬砌受力及变形、地形、水文地质条件方面分析得出围岩偏压是该坍方主要原因，通过模型试验及现场测量，研究偏压坍方处治技术，分析总结各工况下隧道偏压坍方病害特点及规律，提出处治措施建议。模型试验及现场监控结果表明：采用CRD法施工、扩大注浆范围、增设注浆小导管锁脚、加强支护参数等方法对坍方处治后，拱顶下沉变形速率为0.4～1.5 mm/d，周边收敛变形速率为0.5～2.2 mm/d，受力最不利的右拱腰处压力及应变月度增大幅度分别为3.97％和2.35％，说明处治较好地控制了坍方体变形和受力。
이G217교이마지나랍제공로옥계막륵개수도위의탁，침대수도출구단K723＋911～K723＋919담방，종츤체수력급변형、지형、수문지질조건방면분석득출위암편압시해담방주요원인，통과모형시험급현장측량，연구편압담방처치기술，분석총결각공황하수도편압담방병해특점급규률，제출처치조시건의。모형시험급현장감공결과표명：채용CRD법시공、확대주장범위、증설주장소도관쇄각、가강지호삼수등방법대담방처치후，공정하침변형속솔위0.4～1.5 mm/d，주변수렴변형속솔위0.5～2.2 mm/d，수력최불리적우공요처압력급응변월도증대폭도분별위3.97％화2.35％，설명처치교호지공제료담방체변형화수력。
We analyze the collapses of K 723+911~K723+919 in the exit section of Yu-xi-mo-le-gai Tunnel, which connects G217 Qiao-er-ma and Na-la-ti Road.Based on Lining stress and deformation , project topography and hydrogeological conditions , we found that the non-uniform rock pressure is the main reason of these collapses .The model experiments and field surveys proposed the methods to well a-void the collapse , which include CRD method construction , expanding grouting range , additional grou-ting small catheter locking pin and strengthening support parameters .After adopting these methods , the vault subsidence deformation rate is 0.4~1.5 mm/d, and the convergence deformation rate of the sur-roundings is 0.5~2.2 mm/d.Furthermore , the force most unfavorable pressure at the right arch waist and strain monthly increase by 3.97%and 2.35%, respectively .These methods can significantly control the deformation and force of the collapse .