某地下室工程地基滑移后加固处理前结构安全检测鉴定

Structural Safety Inspection and Appraisal after Foundation Sliding and Before Reinforcement Treatment of a Basement Projects

某-1层地下室已施工区域发生严重水平位移,受事故处理专家组委托,在加固处理前,对该地下室结构安全进行应急鉴定。按照鉴定标准要求,对该地下室分地基基础、主体结构两部分进行鉴定。地基基础部分的现场检测采取在采用基桩旁孔测试法对基桩完整性进行全数普查、处理分析后的基础上,挑选部分典型基桩;对选中的基桩进行局部开挖,采用传统低应变方法对基桩旁孔测试结果进行了验证,并采用锚杆静压桩装置提供反力,对抽取基桩的承载力进行了试验。上部主体的检查检测重点放在了结构变形及损伤。根据地基基础、上部结构部分的检查、检测结果及结构验算结果,对该结构安全进行了应急鉴定。为类似工程事故处理前的检测鉴定提供参考。

Serious horizontal displacement occurred in the construction area of a basement on the negative floor. Entrusted by the accident treatment expert group,the structural safety of the basement was evaluated before reinforcement. According to the requirements of appraisal standards,the basement is divided into two parts: foundation and main structure. For the field inspection of the foundation part,some typical foundation piles are selected on the basis of the full survey,treatment and analysis of the integrity of the foundation piles by using the pile side hole test method;The selected foundation pile is excavated locally,the test results of the side hole of the foundation pile are verified by the traditional low strain method,and the bearing capacity of the extracted foundation pile is tested by using the anchor static pressure pile device to provide the reaction force. The inspection and detection of the upper main body focuses on the structural deformation and damage. According to the inspection and detection results of foundation and superstructure and structural checking calculation results,the safety of the structure is evaluated. It provides a reference for the detection and identification of similar engineering accidents before treatment.