施工技术 2012年12月下 36 CONSTRUCTION TECHNOLOGY 第41卷第379期 某工程深基坑内支撑方案优化 闫新郑 (郑州大学第一附属医院,河南郑州450052) [摘要]某医院病房综合楼工程,基坑尺寸为120m×80m×22.67m 基坑四周布置钢筋混凝土灌注桩挡土,挡土桩 内壁设计了4道钢筋混凝土内支撑,-14.600m钢筋混凝土内支撑阻断了自卸汽车运土路线,项目部对深基坑内 支撑进行了方案优化,部分内支撑改为锚索,解决了挖土作业空间小导致的施工效率低的问题,加快了工程进度. [关键词]地下工程;深基坑;支撑;错索;施工技术 [中图分类号]TU753.1 [文献标识码]A [文章编号]1002-8498(2012)24-0036-02 Scheme Optimization on Inner Support of Deep Foundation Excavation in Some Engineering Yan Xinzheng The First Affiliated Hospital of Zhengzhou University Zhengzhou He'nan 450052 China) Abstract:The foundation excavation is about 120 meters in length 80 meters in width and 22.67 meters in depth in some multifunctional ward building.The surrounding of foundation set out reinforced concrete bored piles as retaining piles.In the inner wall of the retaining piles has four rows of reinforced concrete inner support.Because the inner supports at elevation -14.600 meters block out the soil transport route so the scheme optimization on inner support is done part of inner supports are replaced by anchors which can solve the problem of low construction effect induced by small soil-digging space. Key words:underground;deep foundation excavation;support;anchor;construction 随着我国城市化建设步伐的加快,城市人口越闭合低松弛预应力钢绞线铺索(以下简称错索),预 来越多,造成停车难、附属设施建设用地难.拟建应力钢筋采用强度等级标准值f=1860MPa的高 工程设置多层地下停车库、人防工程、附属设施用强低松驰钢绞线,公称直径15.2mm 每道锚索由4 房等,已经成为缓解或解决用地难的重要措施,因 束钢绞线组成,错索长度21.5 21.0 20.0m 错固段 此,建筑基坑越来越深是发展趋势.但由于建设行 入强风化以上岩层>10m.基坑支护如图1所示, 政主管部门要求或周边建筑的限制,采用内支撑的 基坑支护支撑梁内力情况如表1所示. 越来越多,也由此带...
某工程深基坑内支撑方案优化.pdf
