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| MONITORING ANALYSIS AND STABILITY EVALUATION OF PILE-BOLT SUPPORT SYSTEM IN DEEP PIT |
| WANG Chao1，ZHU Yong2，ZHANG Qiangyong1，ZHANG Xutao1，3，WANG Youfa1 |
| (1. Geotechnical and Structural Engineering Research Center of Shandong University，Jinan，Shandong 250061，China；2. Shandong Dazhong News Group(Dazhong Daily Agency)，Jinan，Shandong 250011，China；3. School of Architecture and Engineering，Liaocheng University，Liaocheng，Shandong 252059，China) |
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Abstract The development and utilization of urban underground space have made it critically important for the stability evaluation of deep pits. In this paper，through analyzing the monitoring data from the project of Mass Media Mansion Underground Garage，the stability of pile-bolt supporting system in deep foundation pits was evaluated by adopting the linear-fitting control chart method. The results show that，(1) an abnormal horizontal displacement at the point five meters below the pile top can be observed，(2) the abnormal pit top settlement basically occurs between May and June，and (3) both the horizontal displacement of the supporting piles and the pit top settlement are within the allowable value. The monitoring data of the foundation pit were fed back to construction units in order to take effective measures for the purpose of security and stability of the foundation pit. Accordingly，this technique adopted is able to timely locate the abnormal monitoring points，which contributes to the decision-making of taking early-warning measures.
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Received: 20 May 2013
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| [1] 宋建学，郑 仪，王原嵩. 基坑变形监测及预警技术[J]. 岩土工程学报，2006，28(增)：1 889–1 891.(SONG Jianxue，ZHENG Yi，WANG Yuansong. Deformation monitoring and alerting technology of foundation pits[J]. Chinese Journal of Geotechnical Engineering，2006，28(Supp.)；1 889–1 891.(in Chinese))
[2] 徐 勇，杨 挺，王心联. 桩锚支护体系在大型深基坑中的应用[J]. 地下空间与工程学报，2006，2(4)：646–649.(XU Yong，YANG Ting，WANG Xinlian. Application of the anchor-pile retaining structure in the large foundation pit[J]. Chinese Journal of Underground Space and Engineering，2006，2(4)：646–649.(in Chinese))
[3] 孙 凯，许振刚，刘庭金，等. 深基坑的施工监测及其数值模拟分析[J]. 岩石力学与工程学报，2004，23(2)：293–298.(SUN Kai，XU Zhengang，LIU Tingjin，et al. Construction monitoring and numerical simulation of a foundation pit[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(2)：293–298.(in Chinese))
[4] 中华人民共和国国家标准编写组. GB 50497—2009建筑基坑工程监测技术规范[S]. 北京：中国建筑工业出版社，2009.(The National Standards Compilation Group of People?s Republic of China. GB 50497—2009 Technical code for the monitoring of building foundation pit engineering[S]. Beijing：China Architecture and Building Press，2009.(in Chinese))
[5] 杨 佳，张强勇，刘德军，等. 高程建筑深大基坑支护稳定性评价与监测分析[J]. 人民长江，2010，41(14)：90–93.(YANG Jia，ZHANG Qiangyong，LIU Dejun，et al. Monitoring analysis and stability evaluation of deep foundation pit excavation of high structure[J]. Yangtze River，2010，41(14)：90–93.(in Chinese))
[6] 申永江，孙红月，尚岳全，等. 基于测斜数据抗滑桩工作状态评价[J]. 岩石力学与工程学报，2009，28(增2)：3 591–3 596.(SHEN Yongjiang，SUN Hongyue，SHANG Yuequan，et al. Evaluation of state of anti-slide piles based on inclinometer data[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(Supp.2)：3 591–3 596.(in Chinese))
[7] 袁龙赟. 地铁车站深基坑施工过程稳定性分析[硕士学位论文][D].南昌：南昌大学，2011.(YUAN Longyun. Stability analysis for deep excavation projects of the MTR stations during the construction process[M. S. Thesis][D]. Nanchang：Nanchang University，2011.(in Chinese)) |
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2014, Vol. 33 
