坡地地貌岩体基坑抗浮水头试验模拟与分析  

Experimental Simulation and Numerical Analysis of the Anti-floating Head of Slope Landform Rock Foundation Excavation

作　　者：杨淑娟[1] 于德湖[1] 张同波 余良刚 

机构地区：[1]青岛理工大学土木工程学院,山东青岛266033 [2]青建集团股份公司,山东青岛266000

出　　处：《施工技术》2014年第19期85-89,93,共6页Construction Technology

基　　金：青岛市科技攻关项目(青建发[2005]104号);青岛市建设事业科技重点发展项目:青岛地区地下工程工艺研究;青建集团股份公司科技计划项目:岩体基坑工程抗浮关键技术研究

摘　　要：通过自制试验模型,对坡地地貌岩体基坑在不同降雨强度和坡度下的抗浮水头进行研究,并与有限元程序计算结果对比分析,验证了前期所推导的抗浮水头计算公式的合理性。通过研究进一步表明极端降雨条件下,基坑下游最低点向坑外溢水时,基坑上游水位并不与最低点持平而是持续增长,若取下游最低点作为抗浮水位值,工程将不能满足抗浮要求,存在安全隐患。Through self-made test model, this paper studies the anti-floating head of slope landform rock foundation excavation in different rainfall intensity and slope. With the finite element calculation results for comparative analysis, this paper verifies the reasonableness of the calculation formula of anti-floating head derived preliminary. By further study it shows that under conditions of extreme rainfall, when the lowest point of foundation excavation downstream spills outside, the foundation excavation upstream water level and the lowest point is not flat but sustained growth. If downstream lowest point is presumed as anti-floating level value, the project will not meet the requirements of anti-floating as well as potential safety hazard.

关 键 词：基坑 坡地 岩体 抗浮水头 坡度 试验 

分 类 号：TU753[建筑科学—建筑技术科学]