System and method for wireless monitoring of deformation of shield tunnel

Abstract

The invention discloses a system and method for wireless monitoring of the deformation of a shield tunnel. According to the system and method for wireless monitoring of the deformation of the shield tunnel, monitoring of the deformation of the shield tunnel and early warning are achieved based on measurement of pipe piece inclination. The system for wireless monitoring of the deformation of the shield tunnel comprises a Zigbee wireless sensor network, a GPRS data transmission terminal and a data processing application center, wherein the Zigbee wireless sensor network comprises multiple inclination sensing nodes which are in data communication with one another in a wireless mode, a plurality of routing nodes and a center node, monitoring data, about the variation of inclinations of adjacent blocks, collected by the Zigbee wireless sensor network are sent to the data processing application center through the GPRS data transmission terminal, the monitoring data are processed, stored and analyzed through the data processing application center, monitoring and early warning are achieved according to an analysis result and a preset threshold value, and information is fed back to management staff. According to the system and method for wireless monitoring of the deformation of the shield tunnel, a reasonable early warning threshold value is determined scientifically, the installation positions of the inclination sensing nodes are optimized, the system and device have the advantages that construction is convenient, cost is low, energy consumption is low, the monitoring precision is high and operation is stable and reliable, and the system and device are particularly suitable for wide-range long-term real-time monitoring and early warning of deformation of long shield tunnels.

Description

technical field [0001] The invention relates to the monitoring of shield tunnel deformation, in particular to a shield tunnel deformation wireless monitoring system and method based on segment inclination measurement, and belongs to the technical field of building structure behavior monitoring. Background technique [0002] During the operation period of the shield tunnel, the structural performance of the tunnel is continuously degraded due to the continuous aging of materials, and at the same time, various ground and underground space development activities around the tunnel continue to be carried out, which will directly cause the deformation of the shield tunnel. The deformation of the tunnel will cause water leakage, structural cracks and other diseases, and the water leakage will in turn aggravate the deformation of the tunnel, forming a vicious circle. If the deformation is allowed to develop, it will not only affect the normal operation of the tunnel, but also seriou...

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Problems solved by technology

Among the above methods, the convergent meter method and the opposite side diameter measurement method are limited by the relative distance between the monitoring points on the tunnel periphery, and can only obtain the relative displacement between the two points, so the asymmetric deformation of the tunnel cannot be measured and longitudinal displacement; although the automatic total station and Bassett convergence system can comprehensively monitor tunnel deformation, their monitoring accuracy and monitoring efficiency are low; 3D laser scanning method is a new type of non-contact measurement technology, which uses fast laser The rangefinder emits laser scanning measurement, which has high monitoring accuracy and efficiency, but the cost is high, and it is currently difficult to promote and apply it on a large scale

In addition, another shortcoming of the traditional deformation monitoring method is that due to the lack of in-depth research on the long-term evolution of the deformation of shield tunnels in operation, and the lack of similar engineering experience for reference, the setting of the early warning threshold of monitoring indicators is very difficult. High subjectivity makes it difficult for safety warnings to reflect the real situation of tunnel structure safety

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