Automatic Positioning and Navigation Technology for Shield Machines Based on Visual Measurement
During the excavation process,non excavation equipment such as shield tunneling machines,TBMs,and top pipes mainly rely on a total station fixed to the support structure at the rear,intermittently monitoring and measuring targets placed on the equipment to guide and adjust the posture of the excavation equipment.There are widespread shortcomings in the measurement process,such as the need for measurement stations to follow the tunneling machine and be manually moved continuously,strict requirements for visibility conditions in tunnels during measurement operations,and difficulty in adapting to the unmanned guidance of small and micro tunneling machines,making it difficult to achieve the continuity and automation of observation operations.This article takes the shield tunnel of Changsha Metro Line 6 and the Minjiang River shield tunnel under the North Main Canal of Xiangjiaba Irrigation Area in Sichuan Province as the background,introduces the automatic positioning and guidance technology of shield tunneling based on visual measurement,realizing automatic real-time measurement of equipment posture during shield tunneling,which has important guiding significance for similar projects.
NETL
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