超孔压对海底能源土斜坡稳定性影响的探讨与分析  

Discussion and analysis of the influence of the excess pore pressure on the stability of the slope of the seabed energy soil

作　　者：于桂林[1,2] 孔亮[1,2] 马云[1,2] 

机构地区：[1]青岛理工大学理学院,青岛266033 [2]青岛市岩土力学与近海地下工程重点实验室,青岛266033

出　　处：《青岛理工大学学报》2017年第1期8-14,共7页Journal of Qingdao University of Technology

基　　金：国家自然科学基金资助项目(11572165);山东省自然科学杰出青年基金资助项目(JQ201017)

摘　　要：针对因天然气水合物分解引起的海底能源土斜坡失稳问题,展开了超孔压对海底能源土斜坡稳定性的研究.首先建立海底能源土斜坡理想模型,分析了水合物不同分解程度对海底能源土斜坡稳定性的影响.进而选取水合物分解产生气体非逃逸的超孔压模型,提出了一种考虑超孔压对海底能源土斜坡稳定性影响的等效方法.最后在ABAQUS计算模型中引入水合物分解产生的超孔压这一因素,对比分析了不考虑与考虑超孔压对海底能源土斜坡稳定性计算产生的不同,得出了超孔压对海底能源土斜坡稳定性的影响程度.Aiming at the instability of the slope instability caused by the decomposition of natural gas hydrate,the paper studies the stability of the slope stability of the seabed. First-ly, the slope model of the ideal seabed energy is established, and the influence of the differ-ent degree of the hydrate formation on the slope stability of the seabed is analyzed. Then the excess pore pressure model preventing gas escaping is applied to the calculation of the stabili-ty of the slope. An equivalent method is proposed for the calculation and analysis of the in-fluence of the pore pressure on the stability of the slope of the seabed. Lastly, the pore pres-sure is applied to the ABAQUS model, and the difference of the calculation of the slope sta-bility of the seabed with the consideration of the excess pore pressure is analyzed. The influ-ence of the pressure on the stability of the slope is obtained.

关 键 词：能源土 海水压力 有限元强度折减法 超孔压 安全系数 

分 类 号：O344[理学—固体力学] TE58[理学—力学]