【摘要】 利用有限元模型对两种支护方案下某工程场地堤岸的抗震性能进行了分析。二维有限元模型分析表明,采用双排桩支护方案能明显减小岸边土体的震陷和滑移,并且减小了支护桩的内力反应,达到了"小震不坏,中震可修"的设防目标。三维模型分析表明,第二排桩的桩距为1.5m时场地的抗震稳定性明显好于3.0m的情况。第二排支护桩与堤岸墙之间的土体仍会产生震陷,堤岸挡墙随之向晋江方向滑移,但由于两排支护桩形成的围护屏障使建筑周围土体保持稳定,保证了高层建筑的结构稳定。更多还原

【Abstract】 By the use of finite element model,seismic stability of the bank in an engineering field under two support schemes is analyzed.The results indicate that smaller subsidence and slippage will occur to soil near the bank and inner force of supporting piles will be reduced much when the scheme of double supporting piles is adopted.So the seismic fortification level of ’no damage for frequent earthquakes and repairable for moderate earthquakes’ can be reached.3D model analysis indicates that seismic stability of engineering field is much better improved when the space of second row piles is 1.5m other than 3.0m.Although seismic subsidence and slippage still occur to retaining wall and soil in double supporting piles scheme,seismic stability of high building and soil around the building can be assured because of the enclosure piles.更多还原