Physical model test study on shear strength characteristics of slope sliding surface in Nanfen open-pit mine

Tao, Zhigang; Yu, Shu; Yang, Xujing; Peng, Yanyan; Chen, Qihang; Zhang, Haijiang

doi:10.1016/j.ijmst.2020.05.006

Cited by 88 publications

(43 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The limitation of a box plot is that accurate measurement of the distortion in data distribution and degree of tail weight are not obtained. In addition, for many data sets, the shape information reflected by the box plot is fuzzier, and there are limitations in using the median to represent the overall average [36][37][38][39][40].…”

Section: Exploratory Data Analysis (Eda)mentioning

confidence: 99%

Shock and Vibration of Rainfall on Rotational Landslide and Analysis of Its Deformation Characteristics

Liu

Chen

et al. 2021

Geofluids

View full text Add to dashboard Cite

Earthquake, flood, human activity, and rainfall are some of the trigger factors leading to landslides. Landslide monitoring data analysis indicates the deformation characteristics of landslides and helps to reduce the threat of landslide disasters. There are monitoring methods that enable efficient acquisition of real-time data to facilitate comprehensive research on landslides. However, it is challenging to analyze large amounts of monitoring data with problems like missing data and outlier data during data collection and transfer. These problems also hinder practical analysis and determination concerning the uncertain monitoring data. This work analyzes and processes the deformation characteristics of a rainfall-induced rotational landslide based on exploratory data analysis techniques. First, we found that the moving average denoising method is better than the polynomial fitting method for the repair and fitting of monitoring data. Besides, the exploratory data analysis of the Global Navigation Satellite System (GNSS) monitoring data reveals that the distribution of GNSS monitoring points has a positive correlation with the deformational characteristics of a rotational landslide. Our findings in the subsequent case study indicate that rainfalls are the primary trigger of the Zhutoushan landslide, Jiangsu Province, China. Therefore, this method provides support for the analysis of rotational landslides and more useful landslide monitoring information.

show abstract

Section: Exploratory Data Analysis (Eda)mentioning

confidence: 99%

Shock and Vibration of Rainfall on Rotational Landslide and Analysis of Its Deformation Characteristics

Liu

Chen

et al. 2021

Geofluids

View full text Add to dashboard Cite

show abstract

“…For large-size structures, the cost and difficulty of making test pieces in real size are high. Reducedscale model test thus become a commonly used method in civil engineering experiments [13][14][15], especially in geotechnical [16][17][18] and underground engineering [19]. The authors developed a circumferential loading device that included a tunnel model, a jack loading system, a straindisplacement measurement system, a spring system that simulated the resistance of the surrounding rock, and a reaction frame, as shown in Figure 1:…”

Section: Similitude Model Test Protocolmentioning

confidence: 99%

Experimental Study on the Mechanics Characteristics of CFRP Strengthening of Highway Tunnels at Different Damage States

et al. 2020

View full text Add to dashboard Cite

Cracks and other diseases may occur in the long-term operation of highway tunnels and reduce the structural load-carrying capacity. Strengthening using carbon fiber reinforced polymer (CFRP) sheets and other materials could extend the service time of the tunnels. However, the process of strengthening tunnels is remarkably different from the process of strengthening aboveground structures because of the secondary load. In order to understand the development of stress and deformation of strengthened tunnels under secondary load, a 1 : 10 scaled model was tested to simulate the tunnel strengthened with CFRP under different damage states. The test results show that CFRP strengthening improved the stiffness of the structure and inhibited the propagation of the existing cracks. The peeling of the CFRP sheets made the strengthened structure quickly lose its load-carrying capacity, causing the instability of the structure. The failure loads of the structures strengthened at different damage states were essentially the same, with an average value of 184% of the original failure load. Nevertheless, the early strengthening helped control the structural deformation. The test results also demonstrate that the bonding strength between the CFRP and the lining is essential for strengthening effectiveness. This study provides a theoretical basis for similar engineering reinforcement designs.

show abstract

“…The rock mass contains a large number of weak planes, such as rock joints, bedding planes, and fractures, caused by underground excavations and geothermal energy reservoir production [1][2][3][4]. The stability of the rock mass was controlled by the shear strength of these weak planes [5]. The shear strength of the rock joint was influenced by many parameters, such as normal stress, uniaxial stress, surface asperity, and joint match ratio.…”

Section: Introductionmentioning

confidence: 99%

Exploring the Effect of Asperity Order on Mechanical Character of Joint Specimen from the Perspective of Damage

Yuan

Luo

2021

Geofluids

View full text Add to dashboard Cite

The joint morphology is multiscale. The effect of each asperity order on the mechanical properties of joints is different. The shear mechanical properties of joint specimens are related to its surface damage characteristics. At present, there are still few studies on the effect of roughness on the shearing mechanical properties of joint from the perspective of damage of each asperity order. In this paper, the standard roughness profile was chosen as initial morphology. The standard roughness profile was decomposed into waviness and unevenness by the method combine the ensemble empirical mode decomposition (EEMD) and the cut-off criterion. Then, the joint specimen which contains waviness and unevenness and the specimen which only contains waviness were prepared by the 3D engraving technology. The 40 sets of joint specimens with different asperity order were subjected to direct shear tests under different normal stresses. Based on the 3D scanning technology and ICP iterative method, the damaged area and the damage volume were calculated. Based on the damage volume data and the acoustic emission (AE) data, the effect of asperity order to the joint mechanical behaviour was studied. The results indicate that (1) under low normal stress, the unevenness plays a control role in the failure mode of the joint specimen. Under low normal stress, the joint surface containing only waviness exhibits slip failure, and the joint surface with unevenness exhibits shear failure. With the increase of the normal stress, the failure mode of the specimen containing only waviness changes from slip failure to shear failure; (2) the unevenness controls the damage degree of the joint specimen. The damaged area, damage volume, AE energy rate, and accumulative AE energy of the joint specimen with unevenness are larger than those of the specimen with only waviness, and this difference increases with the normal stress increase; (3) the difference between the joint specimen with unevenness and specimen with only waviness mainly exists in the prepeak nonlinear stage and the postpeak softening stage. The characteristic parameters of acoustic emission generated in the postpeak softening stage of the joint specimen with unevenness are greater than those of the specimen with only waviness. This phenomenon can be used to explain the stress drop difference at the postpeak softening stage; (4) the AE b value can be used to evaluate the damage of joint specimens. Analysing the damage difference of each asperity order under different normal stresses is of great significance to the analysis of the influence of the morphology of the joint surface on the mechanical properties of the joint.

show abstract

Physical model test study on shear strength characteristics of slope sliding surface in Nanfen open-pit mine

Cited by 88 publications

References 38 publications

Shock and Vibration of Rainfall on Rotational Landslide and Analysis of Its Deformation Characteristics

Shock and Vibration of Rainfall on Rotational Landslide and Analysis of Its Deformation Characteristics

Experimental Study on the Mechanics Characteristics of CFRP Strengthening of Highway Tunnels at Different Damage States

Exploring the Effect of Asperity Order on Mechanical Character of Joint Specimen from the Perspective of Damage

Contact Info

Product

Resources

About