时代云图工程基坑对漫水河堤围渗流稳定影响分析  

Analysis of Influence of Foundation Pit in the Shidaiyuntu Section On Seepage Stability of the Manshui River Dikes

作　　者：谢小明 毛元静 XIE Xiaoming;MAO Yuanjing(Guangdong YSD Surveying & Designing Co.,Ltd,Guangzhou 511340,China)

机构地区：[1]广东粤水电勘测设计有限公司,广东佛山528000

出　　处：《广东水利水电》2019年第2期64-69,共6页Guangdong Water Resources and Hydropower

摘　　要：时代云图项目基坑开挖对漫水河堤草塘围有安全威胁,为确保堤围安全,对具有代表性的草塘围堤七3+190断面进行渗流及抗滑稳定分析。基坑开挖前后堤防的渗流溢出比降在0. 33～0. 34之间,满足渗透稳定要求,基坑开挖后堤围溢出点最大水力比降几乎没有变化,整体抗滑稳定安全系数也几乎无变化,计算断面堤坡抗滑稳定安全系数大于正常运用工况的安全系数1. 15,非常运用工况安全系数1. 00,基坑开挖后满足漫水河堤围渗流稳定安全要求。The foundation pit excavation of the Shidaiyuntu project threatens the safety of the drainage ponds dikes of the Manshui River Bank. To ensure the safety of the dikes, the representative drainage ponds dikes 3+190 section was subjected to seepage and anti-sliding stability analysis. The seepage overflow ratio of the dike before and after the excavation of the foundation pit is between 0.33 and 0.34, which satisfies the requirements of seepage stability. The maximum hydraulic ratio drop of the embankment overflow point after the excavation of the foundation pit is almost unchanged. The overall anti-sliding stability safety factor is almost unchanged too. The anti-sliding stability safety factor of the calculated section slope is greater than that 1.15 of normal operating conditions , and that 1.00 of unusual operating conditions. After the foundation pit is excavated, the seepage stability of the flood embankment meets the safety requirements.

关 键 词：堤围 渗流 抗滑稳定 水力比降 安全系数 

分 类 号：TU46[建筑科学—结构工程]