Development of an easy-assembly and low-cost multismartphone photogrammetric monitoring system for rock slope hazards

Fang, Kun; Dong, Ao; Tang, Huiming; An, Pengju; Wang, Qianyun; Jia, Shixun; Zhang, Bocheng

doi:10.1016/j.ijrmms.2024.105655

Cited by 26 publications

(7 citation statements)

References 56 publications

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“…In the case of basic identification of the subsoil, the factor value is assumed as 1.4 ÷ 2.0 depending on the risk to the safety of this earth structure [24][25][26]. The influence of uncertainty in the value of geotechnical parameters on the estimated value of the slope stability factor has been described many times [27][28][29][30][31][32][33][34]. According to the authors of this manuscript, in the analyzed case (the absence of full recognition of geotechnical parameters and low risk to human life, which results from the type of object), the recommended value of the slope stability factor should be at least 1.50.…”

Section: Discussionmentioning

confidence: 99%

Influence of Calculation Parameters on the Slope Stability of the Historical Rasos Cemetery in Vilnius (Lithuania)

Chmielewski,

Bąk,

Muzolf

et al. 2024

Sustainability

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Many objects of cultural and religious importance are located on naturally or artificially shaped hills. In such cases, the stability of the slopes determines both the safety of users and the facilities themselves and thus the preservation of cultural heritage. The analysis of the slope stability requires the assessment of the soil shear strength, defined as the ratio of resistance forces to driving forces. An important issue in the slope stability analysis is the proper determination of soil mechanical parameters, including their changes due to soil moisture. This paper presents an assessment of the slope stability of the Rasos Cemetery in Vilnius (Lithuania), where, due to a partial slope sliding, some of the tombstones were destroyed by being covered with soil. An analysis of the slope stability (factor of safety) was performed for two cross-sections using six calculation schemes. In each of them, calculations were carried out for three groups of soil parameters and for four design approaches (characteristic values, DA2, DA3a, and DA3b in accordance with the geotechnical standard applicable in the European Union—Eurocode 7: Geotechnical design). For the calculation approach (DA3a) for different groups of soil parameters, the values of the slope stability factors of safety were practically below 1.0. If the value of the factor of safety is less than 1.0, the slope is unstable. In the range of values 1.0–1.3, there is a serious risk of slope instability, and only when the factor of safety value reaches above 1.3 is the slope classified as stable. The comparison of the slope stability factors obtained with different design approaches (in relation to the DA3a) shows that the most unfavorable stability factor is approximately 43% lower than the result obtained from the characteristic values, approximately 21% lower than the result obtained using the DA2 design approach, and approximately 24% lower than the result obtained using the DA3b design approach. The analytical and numerical method (GEO5) analysis showed that, regardless of the adopted calculation approach, the required slope stability factor was not obtained. The article shows that selecting the correct geological cross-section to determine the critical slope slip surface and adopting the relevant design approach is crucial for slope sustainability. Based on the analysis, a proprietary solution for the construction work was proposed, which will ensure both the full stability of the slope and the safety of all graves and consequently landslide disaster prevention.

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Section: Discussionmentioning

confidence: 99%

Influence of Calculation Parameters on the Slope Stability of the Historical Rasos Cemetery in Vilnius (Lithuania)

Chmielewski,

Bąk,

Muzolf

et al. 2024

Sustainability

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“…The clustering of northwestern Himalayan landslides is related to phases of deglaciation and intensified monsoon phases (IMPs) (Figure 13). The monitoring and awareness of slope instabilities in alpine regions will increasingly be necessary in the future to implement early warning systems and mitigation strategies [62]. Furthermore, laboratory experiments on hard and soft rock material will contribute to the understanding of landslide mechanics occurring in heterogeneous rock masses [63].…”

Section: Discussionmentioning

confidence: 99%

The Geomechanics of the Dangkhar Landslide, Himachal Pradesh, India

Kaspar,

Kieffer

2024

Geotechnics

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The Dangkhar Landslide is an extremely large landslide located in the Spiti Valley of Himachal Pradesh, India. The landslide is situated in a remote high mountain desert within the Tethys Himalaya at elevations between 3400 m and 5600 m. It is amongst the five largest continental landslides on earth, covering an area of approximately 54 km2 and having an estimated volume of 15–20 km3. Geomechanical evaluations based on the block theory indicate that the Dangkhar Landslide formed as a result of unfavorable combinations of structural geological features and complex surface morphology. A massive kinematically removable block is created by a regional synclinal flexure that is crosscut and kinematically liberated by bounding side valleys. Three-dimensional block kinematics are necessary to permit the release of the giant block and its sliding along the synclinal flexure. Pseudostatic slope stability sensitivity analyses incorporating estimates of site seismicity and shear strength parameters suggest that earthquake shaking could have triggered instability if the static factor of safety was less than or in the range of about 1.5–1.9. Considering the glacial history of the region, ice debuttressing represents an additional potential triggering mechanism.

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“…Firstly, we comprehensively collected all available InSAR datasets covering the Turpan Basin and generated multi-temporal DInSAR datasets with a unified spatial reference through precise registration processes and the setting of reasonable spatial and temporal baseline thresholds [3,11,12]. Subsequently, we employed a wide-area InSAR multi-scale deformation monitoring strategy to conduct in-depth processing on these DInSAR datasets.…”

Section: Methodsmentioning

confidence: 99%

Wide-Area Subsidence Monitoring and Analysis Using Time-Series InSAR Technology: A Case Study of the Turpan Basin

Li,

Gong,

Zhang

et al. 2024

Remote Sensing

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Ground subsidence often occurs over a large area. Although traditional monitoring methods have high accuracy, they cannot perform wide-area ground deformation monitoring. Synthetic Aperture Radar (SAR) interferometry (InSAR) technology utilizes phase information in SAR images to extract surface deformation information in a low-cost, large-scale, high-precision, and high-efficiency manner. With the increasing availability of SAR satellite data and the rapid development of InSAR technology, it provides the possibility for wide-area ground deformation monitoring using InSAR technology. Traditional time-series InSAR methods have cumbersome processing procedures, have large computational requirements, and rely heavily on manual intervention, resulting in relatively low efficiency. This study proposes a strategy for wide-area InSAR multi-scale deformation monitoring to address this issue. The strategy first rapidly acquires ground deformation information using Stacking technology, then identifies the main subsidence areas by setting deformation rate thresholds and visual interpretation, and finally employs advanced TS-InSAR technology to obtain detailed deformation time series for the main subsidence areas. The Turpan Basin in Xinjiang, China, was selected as the study area (7474.50 km2) to validate the proposed method. The results are as follows: (1) The basin is generally stable, but there is ground subsidence in the southern plain area, mainly affecting farmland. (2) From 2016 to 2019, the maximum subsidence rate in the farmland area was approximately 0.13 m/yr, with a maximum cumulative subsidence of about 0.25 m, affecting a total area of approximately 952.49 km2. The subsidence mainly occurred from late spring to mid-autumn, while lifting or subsidence mitigation occurred from late autumn to early spring. The study also analyzed the impacts of rainfall, geographical environment, and human activities on subsidence and found that multiple factors, including water resource reduction, overexploitation, geological characteristics, and the expansion of human activities, contributed to the subsidence problem in the Turpan Basin. This method contributes to wide-area InSAR deformation monitoring and the application of InSAR technology in engineering.

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Development of an easy-assembly and low-cost multismartphone photogrammetric monitoring system for rock slope hazards

Cited by 26 publications

References 56 publications

Influence of Calculation Parameters on the Slope Stability of the Historical Rasos Cemetery in Vilnius (Lithuania)

Influence of Calculation Parameters on the Slope Stability of the Historical Rasos Cemetery in Vilnius (Lithuania)

The Geomechanics of the Dangkhar Landslide, Himachal Pradesh, India

Wide-Area Subsidence Monitoring and Analysis Using Time-Series InSAR Technology: A Case Study of the Turpan Basin

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