Geotechnical reconnaissance and liquefaction analyses of a liquefaction site with silty fine sand in Southern Taiwan

Chang, Win−Jin; Ni, Sheng Huoo; Huang, An-Bin; Yan, Huaxiang; Yu, Yang

doi:10.1016/j.enggeo.2011.09.003

Cited by 27 publications

(12 citation statements)

References 10 publications

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“…Because of the potential destruction and damage to structures and human activities, sand-boil and liquefaction phenomena require thorough studies to assess the geotechnical conditions that may lead to their recurrence (Chang et al, 2011). Sedimentology of the liquefaction mechanisms and the selective processes acting on sand grains are, however, less commonly explored (Ricci Lucchi, 1995;Hurst et al, 2011).…”

Section: Introductionmentioning

confidence: 98%

Sedimentology and composition of sands injected during the seismic crisis of May 2012 (Emilia, Italy): clues for source layer identification and liquefaction regime

Fontana

Lugli

Dori

et al. 2015

Sedimentary Geology

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Section: Introductionmentioning

confidence: 98%

Sedimentology and composition of sands injected during the seismic crisis of May 2012 (Emilia, Italy): clues for source layer identification and liquefaction regime

Fontana

Lugli

Dori

et al. 2015

Sedimentary Geology

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“…The methodology chosen in this study, which is based on shear‐wave velocity measurements, relied on two seismic methods: the MASW method (Park et al ; Xia et al ), and the SPAC method (Aki ) enhanced with the inversion of the horizontal‐to‐vertical spectral ratio (HVSR) of ambient noise for diffuse wavefields (Sánchez‐Sesma et al ).…”

Section: Methodsmentioning

confidence: 99%

“…The HVSR of ambient noise computed at the array center were interpreted following the diffuse field approximation (Sánchez‐Sesma et al ). Under this approach, the power spectrum of motion at an arbitrary point

boldnormal x

and along any Cartesian axis

m

P_{m} (x; ω)

, is proportional to the imaginary part of the corresponding Green’s function at the source,

Im [G_{m m} (x, x, f)]

.…”

Section: Data Processingmentioning

confidence: 99%

“…Within this framework, the shallow shear‐wave velocity

(V_{s})

was considered a good quantitative indicator for geological material stiffness, useful for soil microzonation of urban areas for earthquake disaster mitigation (Martínez‐Pagán et al ).

V_{s}

is a key parameter in dealing with mechanical properties of subsurface materials (e.g., Olona et al ; Duffy et al ; Lorenzo, Hicks and Vera ; Yilmaz ), ground amplification, and liquefaction potential phenomena in earthquake events (e.g., Chang et al ; Tarque et al ; Vella, Galea and D’Amico ).

V_{s}

models have been applied to seismic hazard assessment since ground amplification, which may cause most earthquake‐related damages, often changes with shallow ground stiffness (Park, ).…”

Section: Introductionmentioning

confidence: 99%

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Shear‐wave velocity structure from MASW and SPAC methods: The case of Adra town, SE Spain

Martínez‐Pagán

Navarro

Pérez‐Cuevas

et al. 2018

Near Surface Geophysics

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The damage distribution in the town of Adra (south‐eastern Spain) during the 1993 and 1994 Adra earthquakes of magnitude Mw~5.0 and maximum intensity degree of VII (European Macroseismic Scale) was mainly concentrated in the southeast sector, where the low‐diagenetic (soft) sediments outcrop. As new urbanizations are being planned in this sector, a soil classification based on the shallow shear‐wave velocity (Vs) structure is needed. For the purpose of earthquake disaster mitigation, the Spatial Autocorrelation (SPAC) and the Multichannel Analysis of Surface Waves (MASW) methods were used to propose integrated 2D Vs models for the seismic response characterization of the shallow geology. Joint inversion of H/V spectral ratios of ambient noise, interpreted under the Diffuse Field Approach and the dispersion curves derived from the SPAC method allowed us to obtain more constrained models. Both SPAC and MASW methods provided similar results for the surveyed geological formations. From these models, a classification of the geological formations was carried out in terms of Vs30 values and Eurocode 8 (European Committee for Standardization ) classes. Lower Vs30 values in the 180‐360 m/s range were found in the southeastern sector of the town, where soft sediments outcrop and some building damage was reported during the 1993‐1994 earthquakes. The highest Vs30 values exceeding 800 m/s appear in the northern sector, where the hardest rocks outcrop and no building damage was reported. The combination of the well‐suited Vs database prepared for different geological formations with the 1:5,000 scale geological mapping was an important step to obtain the detailed soil microzonation map of Adra. This approach offered a new predictive insight into the building damage distribution, which would contribute to the appropriate urban planning for the future growth of the town.

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“…It is easy to deform suddenly [2] and cause landslides [3] and quicksands under the external load due to the small diameter and loose structure of the fine silty sand. e poor self-stability after the excavation disturbance leads to the difficulty in forming a load-bearing arch [4], the surface subsidence and cracking [5], and the instability of the tunnel face.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Sonic Vibration Grouting in Fine Silty Sand Layer

Wang

Xia

Wang

et al. 2018

Advances in Civil Engineering

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Fine silty sand layer is one of the common weak strata. It is easy to deform suddenly and induce accidents under the external load due to its loose structure and poor self-stability. To improve the stability of the strata in engineering construction, the grouting is usually used for antiseepage reinforcement in the fine silty sand layer. is paper presents the basic principle of the sonic vibration grouting, develops the experimental device and the simulated stratum condition, mixes the acidic water glass for engineering application, and carries out the experimental study on the sonic vibration grouting. e results show that the effect of the exciting force on the sonic vibration grouting is not obvious, and the vibration duration has a greater influence on it. With the increase of the vibration duration, the grouting diffusion distance is enlarging gradually and stabilizes eventually at a certain value. e vibration frequency has the greatest impact on the grouting. e grouting effect is the best when the vibration frequency is close to the natural frequency of the fine silty sand. e grouting diffusion distance is getting smaller, which means the grouting effect is becoming worse, when the vibration frequency is far away from the natural frequency of the stratum. e grouting effect in the fine silty sand layer can be improved effectively by vibration technology using the sonic vibration grouting which has excellent effect in engineering application. is paper lays a foundation for the further study on mechanism and engineering application of the sonic vibration grouting.

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Geotechnical reconnaissance and liquefaction analyses of a liquefaction site with silty fine sand in Southern Taiwan

Cited by 27 publications

References 10 publications

Sedimentology and composition of sands injected during the seismic crisis of May 2012 (Emilia, Italy): clues for source layer identification and liquefaction regime

Sedimentology and composition of sands injected during the seismic crisis of May 2012 (Emilia, Italy): clues for source layer identification and liquefaction regime

Shear‐wave velocity structure from MASW and SPAC methods: The case of Adra town, SE Spain

Experimental Study on Sonic Vibration Grouting in Fine Silty Sand Layer

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