深基坑桩锚支护体系的监测分析与稳定性评价

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摘要随着城市地下空间的发展，深基坑的稳定性评价越来越重要。通过对山东省大众传媒大厦地下车库工程监测数据整理分析，采用线性拟合控制图法对深基坑桩锚支护体系的稳定性进行评价。通过分析得到以下结论：桩体水平位移异常点出现在距桩顶5 m范围内；坑顶沉降异常点出现在5～6月份；基坑支护桩水平位移及坑顶沉降变化均在安全范围以内。此方法能及时发现异常点，提前报警，提前预防，做到对基坑监测数据的动态分析并及时反馈给施工单位。采取相应的有效措施，可保证基坑的安全稳定性，为以后工程中监测数据与施工的配合积累经验。

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关键词 ：桩基础, 监测数据, 水平位移, 沉降, 控制图法, 动态分析

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.

Key words： pile foundations monitoring data horizontal displacement settlement control charts method dynamic analysis

收稿日期: 2013-05-20

引用本文:

王超1，朱勇2，张强勇1，张绪涛1，3，王有法1. 深基坑桩锚支护体系的监测分析与稳定性评价[J]. 岩石力学与工程学报, 2014, 33(sl): 2918-2923.
WANG Chao1，ZHU Yong2，ZHANG Qiangyong1，ZHANG Xutao1，3，WANG Youfa1. MONITORING ANALYSIS AND STABILITY EVALUATION OF PILE-BOLT SUPPORT SYSTEM IN DEEP PIT. , 2014, 33(sl): 2918-2923.

链接本文:

http://www.rockmech.org/CN/Y2014/V33/Isl/2918

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