作　　者： (崖尚松）;

机构地区： 广州地铁设计研究院有限公司,广州510507

出　　处： 《广东公路交通》 2017年第4期104-109,127,共7页

摘　　要： 基坑变形可分为有支撑暴露变形和无支撑暴露变形。结合上海地铁M2线曲阜路车站的工程实践,分析了基坑围护墙体的变形特征。监测数据分析表明,基坑开挖过程中,有支撑暴露变形是深基坑开挖阶段变形的重要组成部分。利用时空效应规律,适量地减小每步开挖空间和时间,按要求及时加撑,可以明显地减少基坑位移。科学地运用这种基坑开挖的时空效应的规律性,充分调动软土自身控制变形的潜力,可以达到科学施工控制基坑变形的目的。 The deformation of the excavation enclosure is divided into supported exposed deformation and unsupported exposed deformation. Being based on the project practice of Qufulu Station of Line M2 of Shanghai Subway, the deform-ation characteristics of diaphragm wall of excavation enclosure has been analyzed. Analysis of the monitoring data has shown that the exposed deformation is an important part of the deformation during excavation. Using the law of “ time and space冶 effect, the deformation of the excavation enclosure could be significantly reduced by moderate reduction of each excavation space and time and timely supporting according to the requirements. By use of this regularity of 冶 time and space冶 effect of excavation enclosure, fully mobilizing deformation controlling potential of the soft soil, the purpose of scientific control of excavation deformation could be achieved.

关 键 词： 地铁车站 基坑工程 变形监测