In order to study the influence of blasting vibration effect on the lining behavior of an existing adjacent tunnel and to evaluate the safety involved, in-situ monitoring was carried out. Three items were conducted including tunnel lining deformations, concrete surface strains and vibration speeds under different explosive charge quantities. Results showed that the maxim compressive strain on the left arch springing was 20.69 le, far less than specified limit 1400^,6. The maximum vibration speed was 0. 84 cm/s, less than specified limit lOcm/s. Blasting program met the relevant design requirements.%为解决隧道爆破施工产生的地震波对相邻隧道衬砌受力的影响并作出安全评价,采用现场监测手段对既有隧道受临近隧道爆破振动影响进行了研究,分别就旧天坪岭隧道二衬变形、混凝土表面应变、振动速度三个项目进行了不同装药量多次爆破振动测试比较分析,结果表明:隧道衬砌最大压应变为20.69 με,位于左侧拱脚处,说明迎爆面边墙处受影响较大于断面其他位置,远小于设计规范限值1400με；最大振动速度0.84 cm/s,小于规范限值10 cm/s,爆破施工方案满足设计要求.
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