Wave propagations through jointed rock masses and their effects on the stability of slopes

Che, Ailan; Yang, Honggang; Wang, Bin; Ge, Xiurun

doi:10.1016/j.enggeo.2015.12.018

Cited by 101 publications

(23 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…During the model filling process, different compaction times of the soil body can be controlled and filled according to the different weathering degrees of the base rock and the sliding body of the stratum model. To ensure the continuity of the sliding process of the model slope, the Teflon film is used to simulate the sliding belt in this test, and the viability of using Teflon plastic to simulate the sliding belt in the shaking table test is verified by some experts [34,40].…”

Section: Model Test Materialsmentioning

confidence: 99%

Application of BRFP New‐Type Anchor Cable Material in High Slopes against Earthquakes

Wu¹,

Lei

et al. 2021

Advances in Civil Engineering

View full text Add to dashboard Cite

To clarify the feasibility of BFRP (basalt fiber reinforced plastics) anchors instead of steel anchors in the seismic application of slopes under different vibration strengths, a series of shaking table tests were carried out to strengthen the slope using BFRP anchors and steel anchors, respectively. By studying the dynamic response recorded in the slope model and the observed experimental phenomena, the acceleration dynamic response and displacement spectrum dynamic response of the two slope models were analyzed. The test results show that the deformation stage of the slope reinforced by the two types of anchors is basically the same during the test, that is, elastic, plastic (potential sliding surface and plastic strengthening), and failure stages, respectively. The slope is in the elastic stage before the 0.2 g seismic wave, and it gradually enters the plastic stage after the 0.4 g seismic wave. However, the peak acceleration and displacement of the slope reinforced by steel anchors are greater than those of the slope reinforced by BFRP anchors under the same working conditions of seismic waves. In addition, we found that the acceleration response spectrum distribution curve of each measuring point in the short period has an obvious amplification effect along the elevation, and its predominant period has a forward migration phenomenon with the increase of the height of the measuring point, which also indicates that the higher frequency seismic wave has a greater impact on the top of the slope. The BFRP anchors, as a kind of flexible structure supporting slope, can effectively reduce the impact of seismic waves on the slope and attenuate seismic waves to a certain extent compared with steel anchors. Furthermore, the BFRP anchors can be deformed in coordination with the slope, which can improve the overall working performance of the slope, especially limit the dynamic response of the middle and lower slopes. These results can provide a theoretical guide for the seismic design of BFRP anchors for high slopes.

show abstract

Section: Model Test Materialsmentioning

confidence: 99%

Application of BRFP New‐Type Anchor Cable Material in High Slopes against Earthquakes

Wu¹,

Lei

et al. 2021

Advances in Civil Engineering

View full text Add to dashboard Cite

show abstract

“…Moreover, the authors obtained the analytical expression of the transmission and reflection coefficients of the stress waves propagated on the joint surface. Che et al [18] investigated the influence of stress waves on the slope stability of a jointed rock mass through a numerical simulation and an experimental study. However, the influence of the joint width on stress wave propagation was not considered, and the attenuation phenomenon of stress wave transmission was neglected.…”

Section: Introductionmentioning

confidence: 99%

Fluctuation Characteristic Test of Oblique Stress Waves in Infilled Jointed Rock and Study of the Analytic Method

Liu

et al. 2020

Advances in Civil Engineering

View full text Add to dashboard Cite

The propagation of stress waves in filled jointed rocks involves two important influencing factors: transmission-reflection phenomena and energy attenuation. In this paper, the split Hopkinson pressure bar (SHPB) test is used to shock the filled rock with joint angles of 0, 30, and 45° and the thickness of 4 mm and 10 mm, respectively, in three different velocities. The wave curves of the incident wave, reflected wave, and transmission are obtained. The effects of the filling angle and joint thickness on wave propagation are analyzed. Based on the propagation characteristics of stress waves in joints, the stress expression of oblique incident stress waves propagating in filling joints is derived, and the energy coefficient of transmission and reflection is calculated. The results show that the propagation of stress wave in filling joints is related to the impact rate. The larger the impact rate is, the larger the maximum voltage amplitude of the three waves is. And the increasing amplitude of the incident and reflected waves is larger than the transmitted wave; the greater the impact velocity is, the smaller the stress-strain curve gap of the three dip joints is, and the fracture strength of the specimen decreases with the increase of the joint dip angle. The larger the joint dip angle is, the smaller the deformation of the rock-like specimen is. The change of the transmission coefficient is related to the joint angle, and the larger joint angle weakens the influence of the joint width on the transmission of the transmitted wave; under each impact velocity, the theoretical and experimental stress peaks are approximately the same, and the transmission coefficient maintains a good consistency with the oblique incident angle.

show abstract

“…A considerable amount of research has been conducted on the seismic stability of bedding rock slopes using shaking table model tests and numerical simulation [11][12][13][14]. For example, Huang R Q [15] established a conceptual model of the failure mechanism of the layered rock mass slope through actual geological observation work on site, and studied the seismic dynamic response characteristics and failure processes of different structural types of slopes through largescale shaking table experiments; Liu X R et al [16,17] used the shaking table test and numerical simulations to study the stability of bedding rock slopes under the action of the high frequency micro earthquake induced by the Three Gorges reservoir, and considered the influence of different dynamic load amplitudes, dynamic load frequencies, and slope heights on slope cumulative failure; Fan G. [18][19][20] carried out the shaking table test to obtain the dynamic failure mode of bedding rock slope, and used the energy identification method to characterize the development process of earthquake damage inside slope; Chen X L et al [21,22] proposed a method for calculating the dynamic fuzzy reliability of bedding rock slopes under random earthquake excitation based on the Newmark-beta method, and analyzed the influence of ground motion parameters and uncertainty on the reliability of bedding rock slopes.…”

Section: Introductionmentioning

confidence: 99%

Shaking Table Test on Dynamic Response of Bedding Rock Slopes With Weak Structural Plane Under Earthquake

Yang¹,

Zhang²,

Liu³

et al. 2020

Front. Phys.

View full text Add to dashboard Cite

Taking a bedding rock slope with weak structural plane as the prototype, a shaking table test with a similarity ratio of 1:10 is designed and carried out. By analyzing the acceleration and displacement responses at different positions of the slope, the seismic response and instability mechanism of rock bedding slope under different seismic amplitudes, frequencies, and durations are studied. Before the failure of the slope, the rock bedding slope shows an obvious “elevation effect” and “surface effect” under the action of Wenchuan Wolong earthquake wave with different amplitudes. With the increase of the amplitude of the input seismic wave, the elevation effect and the surface effect gradually weaken. When the amplitude of the seismic wave reaches 0.9 g, the rock bedding slope begins to show damage, which demonstrates that the difference of PGA amplification coefficients on both sides of the weak structural plane increases significantly. Compared with the Kobe seismic wave and Wenchuan Wolong seismic wave, the excellent frequency of EL Centro seismic wave is closer to the first-order natural frequency of slope model and produces resonance phenomenon, which leads to the elevation effect of PGA amplification coefficient more significantly. Through the analysis of the instability process of rock bedding slope, it can be found that the failure mechanism of the slope can be divided into two stages: the formation of sliding shear plane and the overall instability of the slope.

show abstract

Wave propagations through jointed rock masses and their effects on the stability of slopes

Cited by 101 publications

References 19 publications

Application of BRFP New‐Type Anchor Cable Material in High Slopes against Earthquakes

Application of BRFP New‐Type Anchor Cable Material in High Slopes against Earthquakes

Fluctuation Characteristic Test of Oblique Stress Waves in Infilled Jointed Rock and Study of the Analytic Method

Shaking Table Test on Dynamic Response of Bedding Rock Slopes With Weak Structural Plane Under Earthquake

Contact Info

Product

Resources

About