Abstract
An anchoring frame beam is a very common form of support for reinforced slopes, especially in alpine regions. Centrifugal tests have proved to be an intuitive and effective means of investigating the mechanism of action of frame beams. However, the data acquisition system of the geotechnical centrifuge in service has the problem of a small number of acquisition channels. A multi-channel selector based on the existing acquisition system was proposed, designed, processed, and manufactured, and it was debugged, tested, and applied in a no-load centrifugal test, static pressure model test, and centrifugal model test. The results show that the acquisition mode of the multi-channel selector connected with a maximum of 288 sensors has been changed from “one-to-one” to “one-to-many”. Its influence on various sensor signals is negligible. The multi-channel selector can work normally, which communicates and feeds back with the remote controller in the 1–120 g no-load centrifugal test. In the static load model test, 162 sensor signals were well collected through it. And only 51 channels were used to effectively obtain the signals of 187 sensors in a 70 g centrifugal model test of an anchoring slope with a frame beam. The multi-channel selector can be successfully applied in different use environments, saving time and reducing the cost of obtaining a single set of data.
Highlights
Landslides (Amato et al, 2019; Carlà et al, 2019; Kreczmer et al, 2021) occur every year around the world, especially in alpine regions (Zhang J. et al, 2021; Zheng et al, 2018; Zhou et al, 2021)
The results show that the multi-channel selector operates well under the condition of 120 g centrifugation, indicating that it can be used in centrifugal tests
The existing centrifugal data acquisition system had a limited number of channels, and it was impossible to collect test data exceeding the number of channels in a centrifugal model test of an anchoring slope by frame beam
Summary
Landslides (Amato et al, 2019; Carlà et al, 2019; Kreczmer et al, 2021) occur every year around the world, especially in alpine regions (Zhang J. et al, 2021; Zheng et al, 2018; Zhou et al, 2021). An anchoring frame beam is a very common form of support for reinforced slopes (Lin et al, 2017; Shi et al, 2019; Zheng et al, 2021b) Various research methods, such as theoretical analysis (Wang et al, 2020; Zeghal et al, 2018; Zhang S. et al, 2021; Zheng et al, 2021a), laboratory tests (Pan et al, 2020; Yao et al, 2020; Zhang et al, 2020b), numerical simulations (Ge et al, 2017), and on-site monitoring (Zhang et al, 2020a; Zhao et al, 2020) were used to study the mechanism and prevention of landslides. It is very meaningful to obtain more data based on the number of channels of the existing acquisition system to reduce the cost of a single dataset in a centrifugal model test
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