Static tension test and the finite element analysis of constant resistance and large deformation anchor cable

Tao, Zhigang; Zhu, Zhen; Han, Wei; Zhu, Chun; Liu, Wenfang; Zheng, Xigui; Yin, Xu; He, Manchao

doi:10.1177/1687814018810638

Cited by 20 publications

(10 citation statements)

References 16 publications

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“…Quasidistributed FBG sensor technology mainly encapsulated the fiber Bragg grating strain gauge into a variety of different types of fiber Bragg grating sensors, which were arranged and installed on the object under testing, to realize the various deformation parameter measurements of this object under testing. [28][29][30]. The corresponding structure is presented in Figure 2(a).…”

Section: Distributed Sensing Technology Based Onmentioning

confidence: 99%

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

et al. 2021

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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.

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Section: Distributed Sensing Technology Based Onmentioning

confidence: 99%

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

et al. 2021

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“…A novel energyabsorbing bolt, known as a constant resistance and large deformation (CRLD) bolt [22][23][24][25][26], is adopted for this monitoring project. e bolt has a compound structure, consisting of a cone-like piston that slides inside an elastically-deformable sleeve pipe ( Figure 4).…”

Section: Principles Of Crld Bolt Monitoringmentioning

confidence: 99%

Combined Application of Optical Fibers and CRLD Bolts to Monitor Deformation of a Pit-in-Pit Foundation

Zhu

Zhang

Cai

et al. 2019

Advances in Civil Engineering

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“Pit-in-pit” foundations, where the overall pit is divided into inner and outer pits, present a wide range of engineering problems and yet have received little detailed study. Among the many factors that affect the stability of a deep foundation pit, loading and rainfall are the two most important. Therefore, in this study, physical model experiments are carried out in the laboratory based on a pit-in-pit foundation that is typical of engineering applications in China, simulating the deformation of the system under different loading and rainfall flow conditions. Optical fibers along with constant resistance and large deformation (CRLD) bolts are adopted to collectively monitor the stress and strain inside the pit-in-pit foundation, assisted by fiber Bragg grating (FBG) displacement meters. The results of the monitoring show that the position of the inner pit relative to the outer pit has a strong influence on the stability of the outer pit. The side on which the inner pit is closest to the outer pit wall is the most prone to instability and should thus be reinforced. Comparison and analysis of monitoring results obtained with optical fibers and CRLD bolts allow a potentially dangerous slip surface to be identified, indicating the value of using this type of collective monitoring in deep foundation pits.

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“…As a kind of extensible cable with composite structure, the used CRLD cable mainly consists of a rod body, constant-resistance body, constant-resistance sleeve pipe, pallet, and tightening nut (see Figure 1). Both constant-resistance body and sleeve pipe constitute the constant resistance device, which can provide constant supporting resistance for the cable (Tao et al 2018c(Tao et al , 2019.…”

Section: Structure and Working Principle Of The Crld Cablementioning

confidence: 99%

Design and operation of App-based intelligent landslide monitoring system: the case of Three Gorges Reservoir Region

Tao

Zhang

Zhu

et al. 2019

Geomatics, Natural Hazards and Risk

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Nowadays, mobile applications (Apps) have become a main form of mobile Internet services, and related applications in the geological disaster monitoring domain must follow this development trend. In this study, an innovative remote and intelligent landslide monitoring system was designed and developed, which can capture the in-depth sliding force state of the slope in real time. When it reaches the early warning threshold, the system immediately transmits the warning information to user terminals and warns users to initiate corresponding risk-avoidance plans. Next, using the developed system, an App of early warning information publishing program was developed to transmit the acquired sliding-force data by field monitoring devices to servers via Beidou Satellite or GPRS base station. The App can inquire background servers via WiFi or 4G for acquiring the monitoring data and curves of the side slope. Finally, the developed system was applied for the monitoring of the sliding mass in Zhoujiawan, Badong County, the Three Gorges Reservoir Region. The monitoring personnel could locate and inspect the failure characteristics of the deformation region in a timely manner using the developed App. The App data exhibited significant correlation and consistency with the monitored results, thus enhancing the inspection efficiency and allowing an effective emergency response.

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Static tension test and the finite element analysis of constant resistance and large deformation anchor cable

Cited by 20 publications

References 16 publications

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

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

Combined Application of Optical Fibers and CRLD Bolts to Monitor Deformation of a Pit-in-Pit Foundation

Design and operation of App-based intelligent landslide monitoring system: the case of Three Gorges Reservoir Region

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