Foundation pit supporting structure deep level displacement monitoring system and method

Abstract

The invention discloses a foundation pit supporting structure deep level displacement monitoring system and method. The system comprises a total station for precisely monitoring distance, intervisibility position reference positions arranged at monitoring points, and a plurality of monitoring points arranged on the foundation pit supporting structure faces and embedded from top to bottom. The monitoring method comprises the steps of monitoring point arrangement, reference point arrangement, reference point measurement and monitoring point measurement. According to the system and method, in the measuring station of the total station, the horizontal distance S between the total station and each reflector plate can be seen as precision measurement, errors of observed values are not accumulated during measuring point displacement accumulation calculation, and the supporting structure deep level displacement monitoring precision is ensured; by adopting the method and system, temporary monitoring can be added for the foundation pit abnormal portion conveniently, a single measuring point or multiple measuring points can be added at any time when a foundation pit supporting axial force monitoring portion axial force valve is abnormal so as to monitor the supporting structure deformation situation, and the complex step that an inclinometer is embedded into a drilled hole inside the supporting structure again is omitted.

Description

technical field [0001] The invention belongs to the technical field of building engineering construction safety monitoring, in particular to the technical field of foundation pit engineering construction monitoring, in particular to a monitoring system and a monitoring method for deep horizontal displacement of foundation pit enclosure structures. Background technique [0002] With the rapid development of urban construction, the development of underground space is also increasing, and the number, depth, plane size and application fields of deep foundation pit projects have been developed rapidly. Moreover, due to the gradual increase in the density of various buildings in the city, the adjacent environment, underground pipelines, and ground traffic have increasingly strict control over the displacement, deformation, and adverse effects of foundation pit excavation and construction. In the construction process of deep foundation pit excavation, only by comprehensively monito...

AI Technical Summary

Problems solved by technology

In the excavation of deep foundation pits of rail transit, the monitoring of the deep horizontal displacement of the enclosure structure is the most important monitoring item to ensure the safety of the foundation pit, and the monitoring components (inclinometer tubes) for monitoring this project will inevitably be damaged due to construction. If it is destroyed, it will not be possible to continue monitoring

Re-drilling and embedding in the enclosure structure will consume more manpower and material resources, increase costs, affect the construction period, and increase the safety hazards of on-site construction during this period

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