Frame Structure and Engineering Applications of the Multisource System Cloud Service Platform of Monitoring of the Soft Rock Tunnel

Abstract

Throughout engineering construction, large deformation disasters in soft rock tunnels are encountered increasingly frequently. Therefore, structural health monitoring not only ensures accurate construction management but also provides a basis for dynamic adjustment of the support structure. The existing monitoring technology has certain shortcomings, such as poor anti-interference ability, non-real-time operation, and great security risks. Consequently, high-precision real-time monitoring has become a key scientific issue in tunnel engineering. For this work, multisource information fusion technology was adopted, while data security reserve systems, such as cloud server (ECS) based on the fiber Bragg grating multisource sensing system, cloud database (RDS), and cloud website, were embedded into the No. 2 inclined shaft of the Muzhailing tunnel. Based on the negative Poisson’s ratio (NPR) anchor cable control technology for large deformation of the soft rock in the No. 2 inclined shaft of the Muzhailing tunnel, reasonable and effective intelligent monitoring was carried out for tunnel construction. Monitoring and early warning cloud service platforms, based on the Internet of Things and cloud technology, could quickly produce query and statistic tunnel monitoring information. The monitoring system provided the collection, transmission, storage, processing, and early warning information sending of data, such as NPR anchor cable axial force, steel arch stress, deep surrounding rock displacement, surrounding rock deformation, and contact pressure between primary support with secondary lining. This monitoring system ensured construction safety and provided monitoring application case support for the related problems of similar projects.

Research on Deformation Mechanisms of a High Geostress Soft Rock Roadway and Double-Shell Grouting Technology

“…Observations. An electronic borehole observation instrument, which is an effective method for grouting evaluation, was used to observe the grouting borehole [26][27][28][29]. Observations showed that the shallow surrounding rock fissures were relatively developed and that the grouting material could fully fill the coal seam fissures to improve the integrity of the coal seam as shown in Figures 13(a)-13(e).…”

Study on Lateral Deformation and Failure Characteristics of Coal Based on Different Confining Pressures

“…e test was divided into two groups: In the first group, an anchor net was used with certain confining pressure + steel belt and U-shaped support, respectively, before the lateral strain of the coal wall became equal to 41.18% of the axial strain. In the second group, after the lateral strain of the coal wall became equal to 64.96% of the axial strain, the anchor net + steel belt and U-shaped support were used to observe the deformation and failure of the coal wall [32][33][34]. e destruction of the coal wall is shown in Figure 10 and the monitoring results are displayed in Figure 11.…”

Coal and Rock Dynamic Disasters: Advances of Physical and Numerical Simulation in Monitoring, Early Warning, and Prevention - Volume II

“…Researchers have conducted various physical experiments to study σ T and the failure zone shapes (Kirsch, 2010;Messerli et al, 2010;Wang et al, 2021b). Some researchers have also conducted centrifuge model tests to study collapse mechanism of tunnel face, yielding significant research outcomes (Atkinson et al, 1977;Chambon and Corte, 1994;Meguid et al, 2008;Idinger et al, 2011;.…”