大跨度地下结构震害特征及破坏机理探讨

EXPLORATION OF DISASTER CHARACTERISTICS AND DAMAGE CAUSES OF LARGE SPAN UNDERGROUND STRUCTURE

根据日本阪神地震中神户地铁的震害特征,对地铁车站、铁道区间隧道、明挖隧道和盾构隧道的震害特点进行了分类,并对其失稳原因进行了分析。认为混凝土中柱震害主要有3个因素:弯曲破坏、剪切破坏和弯剪联合作用破坏;地下铁道破坏的主要原因是围岩失稳,且浅埋结构比深埋结构更易受地震破坏。

Classifying and summarizing the characteristics of disaster damage of subway station, subway excavation with cut-and-cover method and shield tunnel, the article makes preliminary analysis of the reason of instability by unifying th damage e seismic damage performance of the Kobe subway in the great Han Shin earthquake in Japan. ysis it is turned out that there are three basic kinds of damage ： bent damage, shear damage and joint from the above both and it is found that the main cause of the subway damage is adjoining rock instability and the structure in shallow layer.