Multi-attribute seismic data spectrum analysis of tunnel orthogonal underpass landslide shaking table test

Pai, Lifang; Wu, Honggang

doi:10.1016/j.soildyn.2021.106889

Cited by 20 publications

(8 citation statements)

References 20 publications

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“…Tunnel lining is mainly formed by mixing gypsum powder and water in a certain proportion, and the proportion parameters are shown in Table4. The effectiveness of using gypsum as a similar material to simulate C30 concrete has been demonstrated in previous studies(Pai and Wu, 2021a). The 0.2 mm diameter steel wire mesh is used to approximate the annular main reinforcement and distributed reinforcement in tunnel model.…”

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confidence: 69%

Dynamic damage evaluation of lining across the main sliding surface reinforced with multi-anchor round piles under different seismic sequences

Pai

2023

Preprint

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To study the dynamic damage effect of lining across the main-sliding surface reinforced with multi-anchor round piles under different seismic sequences, shaking table test is used for the first time to design two loading sequences of "foreshock-main shock" and "mainshock-aftershock". Based on acceleration, the seismic performance evaluation factor (SPEC) and seismic effect coefficient (Sec) of reinforced lining are proposed. Based on dynamic strain, a calculation method of shear force (Sf) and bending moment (Mb) of multi-anchor round piles is proposed, and the distribution characteristics are given. The evaluation index of reinforcement effect evaluation coefficient (REEC) of reinforced lining is put forward. The results show that the acceleration of the main-aftershock sequence to the multi-anchor round piles is greater than that of the foreshock-main shock sequence. The Sf of pile presents inverted "S" type distribution, while the Mb presents "S" type distribution. Compared with the unoptimized multi-anchor round piles, the seismic effect of Sec and REEC can reach 3.04%-18.96% and 120%-180% respectively. The seismic effect of anchor head optimization is related to seismic sequence, and it is more suitable for seismic structure design of foreshock-main shock sequence. It has great popularization value in tunnel-landslide engineering treatment in high intensity area.

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confidence: 69%

Dynamic damage evaluation of lining across the main sliding surface reinforced with multi-anchor round piles under different seismic sequences

Pai

2023

Preprint

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“…But based on the research so far, most of the seismic studies on landslide-containing tunnels focus on the dynamic response of tunnel lining structures. For example, Pai and Wu [9] studied the dynamic response of tunnel lining under landslide by shaking table test and revealed the characteristics of circumferential spatial dynamic response of tunnel lining structure; in Sun et al [16], interaction analysis of equal pass pair bias tunnel-loess slope coupling system, the dynamic response, and failure mode of the loess slope bias tunnel are revealed. Of course, many scholars have also investigated the dynamic response of the landslidecontaining tunnels.…”

Section: Design Of Shaking Table Model Testmentioning

confidence: 99%

“…Therefore, many scholars have carried out relevant research on tunnel landslide under earthquake action. Pai and Wu [9] carried out shaking table test for the first time, taking orthogonal tunnel underpass landslide as a typical case. The dynamic response of underpass tunnel lining structure was studied, which provided reference for tunnel construction in high-intensity area.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Seismic Damage Modes of Landslides Containing Tunnels under Horizontal Earthquake Action

Sun

Wu²,

et al. 2022

Geofluids

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With the vigorous development of railway and highway construction, tunnel construction often follows the mountains and rivers, crossing high-intensity landslide areas, and potential earthquakes triggering damage in areas including tunnel landslides have become a hot issue today. Based on this, this paper performs a shaker test on the tunnel-containing landslide body, inputs horizontal seismic waves, and tests the acceleration response data of different bits in the landslide body. By analyzing the temporal and frequency domain transformations of the acceleration response at different positions in the slope body combined with the deformation characteristics of the slope, and then analyzing the seismic response of the slope under the action of the front and back seismic sequences, the results show that (1) the existence of the tunnel has the effect of energy dissipation and vibration reduction, making the energy input at T8, and the measuring point on the upper part of the tunnel at the lowest. (2) When the seismic wave is transmitted, it will cause reflection around the tunnel, forming complex seismic wave field, resulting in the irregular distribution of acceleration amplification coefficient. (3) There is a high correlation between seismic responses of different levels. When the acceleration response of the preseismic response to the landslide-containing tunnel is not considered, the acceleration response of the postseismic response to the slope and the structure will be lower than the real value. (4) The sequence of failure at different locations of landslide mass containing tunnel is found through marginal spectrum analysis. It is concluded that the failure mode of landslide mass with tunnel is extrusion and sliding out of the middle slope. The research results can provide some reference for the reinforcement design of landslide with tunnel in high-intensity area.

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“…Zhang, Zhang, et al (2021) and Wu et al (2018) proposed an analytical formula for calculation of the minimum safe distance and the safety factor of the mutual influence between the tunnel and the sliding plane. Tao (2003) and Pai (2022) investigated the effectiveness and methods of using anti‐slide piles to treat landslide damage in tunnels, and explored the application scope and the pile placement method.…”

Section: Introductionmentioning

confidence: 99%

“…Wang et al (2017) analyzed the dynamic response of lining using the elastic dynamics theory and found that the distribution of circumferential stress was not uniform. Wang et al (2018), Pai and Wu (2021b), and Zhou et al (2021) studied the distribution of internal forces and deformation characteristics of tunnels using a series of shaking table tests. Hosseini and Azadi (2012) investigated the influence of the sand lens position on the seismic response of a shallow buried tunnel considering an asymmetric load and liquefaction using FLAC 3D software.…”

Section: Introductionmentioning

confidence: 99%

Shaking table test and cumulative deformation evaluation analysis of a tunnel across the hauling sliding surface

Pai

Wu²,

2023

Deep Underground Science and Engineering

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To explore the cumulative deformation effect of the dynamic response of a tunnel crossing the hauling sliding surface under earthquakes, the shaking table test was conducted in this study. Combined with the numerical calculations, this study proposed magnification of the Arias intensity (MIa) to characterize the overall local deformation damage of the tunnel lining in terms of the deformation characteristics, frequency domain, and energy. Using the time‐domain analysis method, the plastic effect coefficient (PEC) was proposed to characterize the degree of plastic deformation, and the applicability of the seismic cumulative failure effect (SCFE) was discussed. The results show that the low‐frequency component (f1 and f2 ≤ 10 Hz) and the high‐frequency component (f3 and f4 > 10 Hz) acceleration mainly cause global and local deformation of the tunnel lining. The local deformation caused by the high‐frequency wave has an important effect on the seismic damage of the lining. The physical meaning of PEC is more clearly defined than that of the residual strain, and the SCFE of the tunnel lining can also be defined. The SCFE of the tunnel lining includes the elastic deformation effect stage (<0.15g), the elastic–plastic deformation effect stage (0.15g–0.30g), and the plastic deformation effect stage (0.30g–0.40g). This study can provide valuable theoretical and technical support for the construction of traffic tunnels in high‐intensity earthquake areas.

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Multi-attribute seismic data spectrum analysis of tunnel orthogonal underpass landslide shaking table test

Cited by 20 publications

References 20 publications

Dynamic damage evaluation of lining across the main sliding surface reinforced with multi-anchor round piles under different seismic sequences

Dynamic damage evaluation of lining across the main sliding surface reinforced with multi-anchor round piles under different seismic sequences

Analysis of Seismic Damage Modes of Landslides Containing Tunnels under Horizontal Earthquake Action

Shaking table test and cumulative deformation evaluation analysis of a tunnel across the hauling sliding surface

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