长江漫滩地层深大基坑开挖设计及稳定性分析  

Excavation Design and Stability Analysis of Deep and Large Foundation Pit in Floodplain of Yangtze River

作　　者：王龙飞 Wang Longfei(The City Construction Company Ltd of China Railway 15 Bureau Group,Luoyang 471002,China)

机构地区：[1]中铁十五局集团城市轨道交通工程有限公司,河南洛阳471002

出　　处：《科学技术创新》2022年第20期97-100,共4页Scientific and Technological Innovation

摘　　要：通过对南京地铁9号线滨江公园车站深大基坑开挖设计参数及其稳定性分析研究,提出漫滩地层深大基坑开挖宜采用纵向分段,竖向分层的“拉马道式”开挖方式。竖向分层开挖深度宜取2m≤H≤5m;纵向分段长度宜取6m≤L<14m;开挖放坡比例宜取1:2及以下。实际施工过程中,该基坑开挖设计使对地层扰动减弱,进一步阻止了上层软弱土坍塌,地表沉降降低。Based on the analysis and Research on the design parameters and stability of deep and large foundation pit excavation of Binjiang Park Station of Nanjing Metro Line 9,it is proposed that the deep and large foundation pit excavation in floodplain stratum should adopt the“pull horse road”excavation method of longitudinal segmentation and vertical layering.The vertical layered excavation depth should be 2m≤h≤5m;The length of longitudinal section should be 6m≤L<14m;The excavation slope ratio should be 1:2 or less.In the actual construction process,the excavation design of the foundation pit weakened the disturbance to the stratum,further prevented the collapse of the upper soft soil,and reduced the surface settlement.

关 键 词：漫滩地层 基坑开挖 地表沉降 

分 类 号：TU758.11[建筑科学—建筑技术科学]