为了研究渗流和双向地震作用下跨海减震隧道工程结构的稳定性,采用动力有限元静力强度折减法,并利用 ADINA 软件分别建立了结构场和流体场分析模型。考虑黏弹性人工边界、双向地震和渗流的影响,研究海水深度、覆岩厚度和 渗透系数对设置减震层跨海隧道动力稳定安全系数的影响以及塑性区的变化规律。研究结果表明: 渗流和双向地震作用 下,跨海减震隧道结构的塑性区最先出现在隧道结构的两侧拱脚和拱肩周边部位,拱顶部位没有出现塑形区; 覆岩厚度越 厚,设置减震层对跨海隧道在地震作用下的安全系数提高越少; 海水深度和渗透系数的变化对设置减震层跨海隧道结构的 安全系数影响不大; 覆岩厚度的变化对跨海隧道在渗流和地震作用下安全系数的影响大于海水深度和渗透系数的影响。
2024-12-04 iGeo
中仿科技PLAXIS案例:基于二阶锥规划理论的有限元强度折减法及应用等,基于有限元数值模拟技术。PLAXIS软件代理商提供技术支持和培训。
2026-03-13 iGeo
边坡失稳是一种严重的地质灾害,在详细的地质调查、分析基础上,对枇杷园边坡的破 坏模式进行分析,利用 Adina 软件对边坡进行有限元计算,分析边坡的应力分布,根据强度折 减法理论,对边坡稳定性安全系数进行计算,研究成果表明,边坡可能沿软弱夹层滑动,对边坡 采取以抗滑桩加固措施进行了有限元计算,验证加固方法的有效性。
2024-12-04 iGeo
中仿科技PLAXIS案例:基于 SCPTU 测试的软土基坑开挖数值模拟研究等,基于有限元数值模拟技术。PLAXIS软件代理商提供技术支持和培训。
2026-03-13 iGeo
The genetic mechanism and evolvement process of the reservoir bank landslide were discussed detailedly based onengineering exploration and analyzing environmental geological conditions. And some main factors effecting stability of the landslidewere analyzed emphatically. Through building a 3D FEM model of landslide, the stable situations of the landslide under varioussituations were considered based on the strength reduction method. The result shows that the landslide is steady under the naturalsituation. The front edge of the landslide will be drowned out when the reservoir retains water normally; the safety factor reduces andcan’t meet the requirements of norms. The landslide tends to be more dangerous under rainfall infiltration and rapid drawdown of thereservoir water level. And the landslide will be instable when water storage situation and earthquake situation were considered at thesame time. According to the preceding analysis, the treatment measures of cutting slope and reducing load were presented. Thelandslide is steady under various conditions after being controlled. The relevant conclusions and methods proposed take a good effectin landslide treatment.
2024-12-04 iGeo