| With the continuous development of Handan, the depth of the foundation pit is also deepening, and the safety of the foundation pit has becomemore prominent. Foundation destroy a variety of forms, but mainly in the form of damage to the displacement of deformation is too large envelope. So to ensure the safety of the foundation pit, the most important is monitoring displacement and deformation of foundation pit supporting structure to control the deformation of foundation pit.This paper takes Handan City, Oriental International Business Center as an engineering example, and the type of the engineering is determined first class. According to "Technical specification for monitoring of building foundation pit engineering" 50497-2009 GB requirements to develop the corresponding monitoring programs for actual monitoring of the foundation pit engineering, the main contents of the monitoring are the horizontal displacement of the retaining structure, the horizontal displacement of the crown and the surface subsidence around the foundation pit.In this paper, the actual monitoring data obtained by processing different conditions, draw in the form of charts, graphs, compare monitoring databy using the charts and graphs and design calculation results. By comparison analysis, we can learn the displacement variation trend of supporting structure, the horizontal displacement of the pile top and the change trend of the surface subsidence, while analyzing the reasons for the change in order to learn the overall change trend of the foundation pit and the causes. Take appropriate measures for different alarm monitoring projects to prevent partial test point beyond the alarm value.Finally, the analysis and comparison of theory and practice shows thatany one monitoring data doesn’t exceed the design value and is far less than the design calculated value and early warning value, so it can be concluded that the standard of theoretical calculation is conservative. |
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