Design and monitoring of bracings for deep excavation of Hanguo Commercial Center in Shenzhen
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摘要: 在深基坑工程中采用桩撑和桩锚结合的支护方法,能较好地控制变形,给桩基础提供施工空间,还可以降低工程造价。以深圳汉国城市商业中心深基坑支护工程为例,介绍了桩撑(含圆环内支撑)和桩锚结合设计的考虑因素,结合监测数据分析了该支护方式下支护桩的变形规律、支撑的受力情况,对内支撑特别是环撑内力的计算方法进行探讨。Abstract: The combined method of piles and anchor cables is practicable in deep excavations. By using this method, the deformation can be controlled, the working space can be provided for pile foundation, and the project cost can be saved. Based on the excavation of Hanguo Commercial Center in Shenzhen, the factors for the combined method of piles and anchor cables are investigated. According to the monitoring data, the deformation rules of piles and the bearing force on bracings are analyzed. Further discussion and researches about caculating interior bracings especially the circular inner bracings are carried out.
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Keywords:
- deep excavation /
- circular inner bracing /
- design /
- monitoring
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[1] 中国建筑科学研究院. JGJ120—99 建筑基坑支护技术规程[S]. 北京: 中国建筑工业出版社, 1999. (China Academy of Building Research. JGJ120—99 Technical specification for retaining and protection of building foundation excavtions[S]. Beijing: China Architecture and Building Press, 1999. (in Chinese)) [2] 中华人民共和国建设部. GB50007—2002 建筑地基基础设计规范[S]. 北京: 中国建筑工业出版社, 2002. (Ministry of Construction P R C. Code for design of building foundation[S]. Beijing: China Architecture and Building Press, 2002. (in Chinese)) [3] 刘国彬, 王卫东. 基坑工程手册[M]. 2版. 北京: 中国建筑工业出版社, 2009. (LIU Guo-bin, WANG Wei-dong. Excavation engineering handbook[M]. 2nd ed. Beijing: China Architecture and Building Press, 2009. (in Chinese)) [4] 李洪海, 周 宇. 深圳平安金融中心超深基坑运土坡道设计与施工[J]. 施工技术, 2011, 40(350): 36–38. (LI Hong-hai, ZHOU Yu. Design and construction of earthmoving ramp of ultra-deep foundation in Shenzhen Ping'an Financial Center[J]. Construction Technology, 2011, 40(350): 36–38. (in Chinese))