地下连续墙成槽施工槽壁稳定时空效应的分析  

Analysis of Space-Time Effect on Stability for Diaphragm Walls Under Trenching Construction

作　　者：王晓华 贾文彪 胡长明[2,3] 路乾 杜逸璞 WANG Xiaohua;JIA Wenbiao;HU Changming;LU Qian;DU Yipu(China Railway the First Group Construction&Installation Engineering Co.,Ltd,Xi′an 710055,China;School of Civil Engineering,Xi′an University of Architecture and Technology,Xi′an 710055,China;Shaanxi Key Laboratory of Geotechnical and Underground Space Engineering,XAUAT,Xi′an 710055,China)

机构地区：[1]中铁一局集团建筑安装工程有限公司,西安710055 [2]西安建筑科技大学土木工程学院,西安710055 [3]陕西省岩土与地下空间工程重点实验室,西安710055

出　　处：《工业建筑》2022年第2期101-107,共7页Industrial Construction

摘　　要：地下连续墙槽壁稳定关乎成槽安全和成槽质量,为保证槽壁稳定,对成槽施工时槽壁单元土体的应力变化情况进行了分析,探讨槽壁稳定条件及影响因素,重点讨论时空效应影响,并结合实测数据验证时空效应作用。研究结果表明:时效因素对槽壁稳定影响作用显著,增大泥浆重度及提高泥浆液面均会提高槽壁稳定性,但后者效果相对更好。成槽施工对槽壁中部浅层土体扰动更大,土体侧向位移、地表沉降及土压力分布均表现出一定程度的空间效应。The stability for the trench of diaphragm walls is related to the safety and quality of trenching construction.To ensure the stability of trenches,the stress variation in the earth of trench walls was analyzed under trenching construction,the stability conditions and influencing factors of trench walls were discussed,the influence of space-time effect was discussed emphatically,and the influence of space-time effect was verified by the measured data.The results showed that:the time effect had a significant effect on the stability of the trench.Increasing the mass density of slurry and the level of mud and could improve the trench stability,and the latter was more effective.The shallow soil in the middle of the trench was more disturbed during construction of trenching,and the lateral displacement,the subsidence of the earth’s surface and the earth pressure appeared a certain spatial effect.

关 键 词：地下连续墙 槽壁稳定 土体应力 影响因素 时空效应 

分 类 号：U231.3[交通运输工程—道路与铁道工程]