Experimental investigation on liquefaction and post-liquefaction deformation of stratified saturated sand under cyclic loading

Abstract

Ti t l e Ex p e ri m e n t al inv e s ti g a tio n o n liq u ef a c tio n a n d p o s tliq u ef a c tio n d efo r m a tio n of s t r a tifi e d s a t u r a t e d s a n d u n d e r cyclic lo a di n g

Experimental study on the triaxial mechanical behaviors of the Cemented Paste Backfill: Effect of curing time, drainage conditions and curing temperature

“…And the maximum output air pressure is 1 MPa. More detailed information about the testing system can be found in Xiu et al (2020). During the testing process, the sample wrapped by rubber films was placed in the pressure chamber, then the given confining pressure (σc) is provided for the sample using hydraulic water.…”

“…During the compressive tests, the axial loading rate is set at 1 %/min using strain-controlled method (Xiu et al, 2020), and the maximum axial strain is 12%. Also, when the measured residual stress is in a stable stage or the bearing capacity of the tested sample was obviously lost, the loading will be stopped.…”

“…When the σc/Sd0≠0%, with the increase of σc/Sd0, the number of cracks decreases, and the vertical tensile cracks and micro cracks gradually disappear, and then the obvious shear failures appear. Moreover, the dense cracks are widely distributed on the top of the tested CPB samples, the reason for this phenomenon is the uniform deformation of the CPB sample during the loading process (Xiu et al, 2020).…”

“…on CPB's UCS was studied in detail (Cao and Song, 2017;Li and Fall;Hou et al, 2020). There were also a number of UCS related studies on CPB including but not limited to: the digital image correlation (DIC) (Xiu et al, 2020), acoustic emission (AE) (Zhou et al, 2020;Zhao et al, 2020), CT (Cao et al, 2021), ultrasonic pulse velocity (UPV) (Yilmaz et al, 2014;Ercikdi et al, 2016;Jiang et al, 2020), numerical simulation (Liu et al, 2017) and other advanced methods were also used to quantitatively analyze the damages of CPB structures. For backfilled CPB structures on site, the mechanical properties of CPB unit located at a given depth were also significantly affected by the lateral constraint stress (σ3).…”

Analysis of Soil Liquefaction Potential through Three Field Tests-Based Methods: A Case Study of Babol City

“…Consequently, effective stress reduces and soil loses its strength. The investigation of failure of soil masses during earthquakes requires sciences of geology and engineering [5], [6]. To confront destructive effects of liquefaction, the assessment of soil liquefaction potential and recognition of liquefiable regions are essential.…”