某高层建筑纠倾加固与监测工程技术研究
摘要：针对高地下水位泥岩地基软弱、施工不当等引起的高层建筑地基不均匀沉降的病害，进而导致上部结构倾斜的工程案例，通过现场勘察研究制定了纠倾加固技术方案并实施，纠倾加固过程中运用沉降观测和倾斜观测研究了大楼的变形特征。结果表明：“锚杆静压桩结合钢筋混凝土灌注桩止倾加固，井形巷道钻孔取土结合锚索加压调控纠倾”的综合纠倾加固方案对该纠倾加固工程切实可行，工程实施后高层建筑倾斜率由3.99‰降低至1.21‰,满足规范及正常使用要求；高层建筑纠倾加固过程中沉降观测结果和倾斜监测结果可以相互验证，监测结果的及时分析反馈可以实现“动态化设计，信息化施工”以便及时适当调整纠倾加固方案，保障大楼结构安全；对高层建筑纠倾加固工程，采取先止倾加固再纠倾加固的方式，纠倾过程及结果会比较理想。
关键词：高层建筑；纠倾加固；监测；止倾；回倾；
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[10] 建筑地基基础设计规范：GB 50007—2011[S].北京：中国计划出版社，2012.
[2] 王桢，张小兵.西宁市盐湖小区4号商住楼纠倾扶正施工技术[J].施工技术，2011,40(增刊):41-44.
[3] 孙琪，王珑，郑建忠，等.某高层建筑物综合纠偏加固方法的应用[J].工程勘察，2017,45(8):12-16.
[4] 程晓伟，王桢，张小兵.某高层住宅楼倾斜原因及纠倾加固技术研究[J].岩土工程学报，2012,34(4):756-761.
[5] 牛文庆，张小兵，王逢睿，等.西宁某高层商住楼纠倾加固工程分析与数值计算研究[J].建筑结构，2018,48(S2):721-725.
[6] 邓正定，孙琪，王珑，等.止倾迫降综合纠倾法机理分析及在高层建筑纠偏中的应用[J].铁道建筑，2016,56(2):116-120.
[7] 李延涛，王建厂，梁玉国.某高层筏板基础纠倾迫降的设计与施工[J].工程质量，2015,33(4):79-82.
[8] 田朝阳，梁玉国.高喷插芯组合桩在高层建筑纠倾加固中的应用[J].工程质量，2017,35(1):30-33.
[9] 建筑变形测量规范：JGJ 8—2016[S].北京：中国建筑工业出版社，2016.
[10] 建筑地基基础设计规范：GB 50007—2011[S].北京：中国计划出版社，2012.
Research on rectification reinforcement and monitoring engineering of a high-rise building
Abstract: In view of a practical engineering case that the uneven settlement of high-rise building foundation caused by weak mudstone foundation under high underground water level and improper construction, which leads to the inclination of the upper structure, through on-site investigation and research, a technical scheme for rectification and reinforcement was developed and implemented. During the rectification and reinforcement process, settlement observation and inclination observation were used to study the deformation characteristics of the high-rise building. The results show that the comprehensive inclination correction and reinforcement scheme of "anchor static pressure pile combined with reinforced concrete cast-in-place pile for stop-overturning and reinforcement, borehole soil extraction in well shaped roadway combined with anchor cable pressure regulation and correction" is feasible for this inclination correction and reinforcement project. After the implementation of the project, the inclination rate of high-rise buildings is reduced from 3.99 ‰ to 1.21 ‰, meeting the requirements of the specification and normal use. During the process of rectifying and strengthening high-rise buildings, the settlement observation results and inclination monitoring results can be mutually verified. The timely analysis and feedback of the monitoring results can achieve "dynamic design and informatization construction", so as to adjust the rectification and reinforcement scheme timely and appropriately and ensure the safety of the building structure. For the rectification and reinforcement of high-rise buildings, adopting the method of first stop-overturning and then correcting and strengthening, the rectification process and results will be ideal.
Keywords: high-rise building; rectification and reinforcement; monitoring; stop-overturning; rectifying
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