摘要
In April 20,2013,a strong earthquake measured Ms7.0 hitted Lushan county,Sichuan province,which was induced by Longmenshan front fault,i.e.Dachuan-Shuangshi fault.It was the second large earthquake occurred along Longmenshan fault zone since Wenchuan earthquake in 2008.From April 25on,the authors made three field visits to the quake-hit area.The disasters were summarized,and the potential problems during post-quake reconstruction were discussed.The results showed that compared with Wenchuan earthquake,the quake-induced disasters were lighter;no obvious surface ruptures were ever witnessed along the quake-inducing fault;both landslide and rockfall happened in small scale,so no large barrier lake was ever formed;landslide distributed along the seismogenic fault,and the rock types were Xujiahe Formation of Upper Triassic;rockfall appeared mainly in the gorge segment of rivers,and the rock types were mainly conglomerate and secondly intrusive rock;severe building damages were mainly brick-wood structured residential housings or brick-concrete-structured ones without constructional columns or ring beams;the major geohazard problems during post-quake reconstruction were rockfalls along major roads and debris flow in Baxing county town.