Characteristics of seismic disasters and aseismic measures of tunnels in Wenchuan earthquake
Characteristics of seismic disasters and aseismic measures of tunnels in Wenchuan earthquake
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DOI：
10.1007/s12665-017-6405-3
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发表时间：
2017-01
影响因子：
2.8
通讯作者：
J. Lai;Siyue He;Junling Qiu;Jianxun Chen;Lixin Wang;Ke Wang;Junbao Wang
中科院分区：
文献类型：
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作者：
J. Lai;Siyue He;Junling Qiu;Jianxun Chen;Lixin Wang;Ke Wang;Junbao Wang
近年来，伴随着大地震的频繁发生，隧道的抗震问题越来越受到人们的重视。为减少隧道震害，探索合理的抗震措施，以汶川地震为例，通过隧道震害调查，对隧道震害进行了分析和总结。对四川省震中附近的52条隧道进行了调查，结果表明，仅有7条隧道未出现结构破坏，其中6条隧道破坏最为严重，其余隧道均出现了不同程度的破坏。结果表明，断层破碎带地震破坏最严重，其次是洞口段和普通段。结果表明，隧道典型的震害表现为衬砌开裂、坍塌、错动、施工缝开裂、仰拱隆起等，其中衬砌开裂和坍塌所占比例较大。因此，隧道抗震设计应重点考虑断层破碎带和洞口段。隧道设计应采用带减震器的复合式衬砌结构和全链条交替注浆，以防止抗震设防区衬砌开裂和坍塌。
Over the past few years, accompanied by big and frequent earthquakes, more attention was paid to the tunnel earthquake resistance. To reduce tunnel seismic damage and explore the reasonable aseismic measures, the tunnel earthquake disaster investigation was employed to analyze and summarize the tunnel seismic damage on the basis of Wenchuan earthquake. Fifty-two tunnels near the epicenter of Sichuan Province were investigated: Only 7 tunnels did not show structure damage, 6 tunnels suffered the most serious damage, and the rest appeared damage to various extents. It indicates that most serious seismic damage happens to fault fracture zone, followed by entrance and common section of the tunnel. Additionally, the results display that the typical seismic damage of tunnels is lining cracking, collapsing, dislocation, construction joints cracking, and uplifting of invert, and usually lining cracking and collapsing account for a larger proportion. Therefore, the tunnel aseismic design should emphasize the fault fracture zone and tunnel entrance. Tunnel design should adopt the composite lining structure with shock absorber and whole chain alternative grouting to prevent the lining cracking and collapsing in the seismic fortification zone.