小净距隧道爆破仰拱振动及损伤特性研究  

STUDY ON FILLING VIBRATION AND DAMAGE CHARACTERISTICS OF INVERTED ARCH INSMALL SPACING TUNNEL BLASTING

作　　者：辛柏成 武宝鲁 周松樊 许华威 管晓明[1] XIN Bocheng;WU Baolu;ZHOU Songfan;XU Huawei;GUAN Xiaoming(School of Civil Engineering,Qingdao University of Technology,Shandong Qingdao 266033,China)

机构地区：[1]青岛理工大学土木工程学院,山东青岛266033

出　　处：《低温建筑技术》2025年第1期100-104,共5页Low Temperature Architecture Technology

基　　金：山东省自然科学基金项目(ZR2022ME043);青岛市科技惠民示范工程(23-2-8-cspz-13-nsh)。

摘　　要：仰拱填充混凝土作为隧道的重要支撑结构,在相邻隧道爆破振动影响下极有可能产生损伤。依托秦岭太兴山隧道爆破工程,开展了仰拱填充爆破振动测试,分析其振速、频率分布规律。通过建立三维数值模型,进一步研究了仰拱填充混凝土爆破振动特性及损伤机理。研究结果表明,仰拱填充混凝土水平径向振速最大,实测最大振速超过安全标准。受开挖卸荷与爆破地震波的反复拉压作用,拉应力超过混凝土抗拉强度,仰拱填充中部沿纵向出现多条裂缝,在相邻隧道爆破作用下发生破坏。As an important support structure in tunnels,the inverted arch fill concrete is highly susceptible to dam⁃age under the blasting vibration effects of adjacent tunnels.Based on the blasting engineering of the Qinling Taixing⁃shan Tunnel,blasting vibration tests of the inverted arch fill concrete were conducted to analyze the distribution pat⁃terns of vibration velocity and frequency.Additionally,a 3D numerical model was established to further study the blasting vibration characteristics and damage mechanism of the inverted arch fill concrete.The results show that the horizontal radial vibration velocity of the inverted arch fill concrete is the largest,with the measured maximum veloc⁃ity exceeding the safety standards.Due to the repeated tensile and compressive actions of excavation unloading and blasting seismic waves,tensile stress exceeds the concrete's tensile strength.Multiple cracks appear longitudinally in the central region of the inverted arch fill,leading to damage under the blasting effect of the adjacent tunnel.

关 键 词：隧道爆破 仰拱填充 数值模拟 动力响应 损伤机理 

分 类 号：TU91[建筑科学—建筑理论]