2results about How to "Avoid Destabilization and Destruction" patented technology

This invention provides a method and system for determining the timing of arch reinforcement construction in soft rock deformation sections of open-face TBM tunnels. The method includes: obtaining a first deformation threshold for a typical steel arch within the tunnel section entering its ultimate bearing capacity; monitoring the deformation of the steel arch to be tested within the tunnel section; and determining whether arch reinforcement is needed at the steel arch based on the first deformation threshold and the monitored deformation values. This invention establishes a decision-making mechanism for arch reinforcement based on steel arch deformation monitoring values. It determines whether reinforcement is needed by analyzing the relationship between the steel support deformation monitoring values ​​and the deformation threshold, effectively balancing the conflict between TBM tunneling and support, and improving TBM tunneling efficiency. The decision criteria are simple and clear, allowing for precise determination of reinforcement timing and avoiding problems such as increased construction risks, increased investment, and extended construction periods caused by subsequent arch replacement.

This invention relates to a thick-walled rubber-lead-core rubber composite bearing with vertical limiting function. It includes a thick-walled rubber bearing, a lead-core rubber bearing, a sleeve, and a vertical guide rod. The sleeve is embedded in a hole in the center of the thick-walled rubber bearing, and the vertical guide rod is inserted into the sleeve. The sleeve includes a wide portion and a narrow portion, and the vertical guide rod also includes a wide portion and a narrow portion. Under normal load, the overall vertical stiffness of the composite bearing is the series stiffness of the pure thick-walled rubber bearing and the lead-core rubber bearing. Under horizontal seismic action, the horizontal force between the upper and lower flange plates of the thick-walled rubber bearing is mainly transmitted through the contact between the vertical guide rod and the steel pipe sleeve. When the seismic action is large, resulting in large vertical compressive and tensile deformation of the thick-walled rubber bearing, the vertical guide rod and the sleeve provide contact stiffness. Compared with the prior art, this invention has advantages such as vibration isolation / earthquake protection, simple bearing connection structure for easy production and installation, and prevention of tensile damage and rigid swaying of the device.