Identification of Abnormal Operating Conditions and Intelligent Decision System for Earth Pressure Balance Shield Machine

摘要

In the Earth Pressure Balance shield construction, the soil dug in the capsule is difficult to form the "plastic flow state" and will cause three abnormal operating conditions including occlusion, caking in the capsule and spewing at the outlet of the dump device. These abnormal operating conditions will then trigger failure in tunneling, cutter-devices damage and even catastrophic incidents such as ground settlement. This paper effectively integrates mechanism of abnormal operating conditions and knowledge of soil conditioning and establishes a uniform model of identification of abnormal conditions and intelligent decision support system based on belief rule-base system. The model makes full use of knowledge of improving the soil, construction experience and data to optimize the model on-line. Finally, a numerical simulation with specific construction data is presented to illustrate the effectiveness of the algorithm.