Investigation of 3D deformation of transparent soil around a laterally loaded pile based on a hydraulic gradient model test

Yuan, Bingxiang; Sun, Min; Xiong, Lei; Luo, Qingzi; Pradhan, Sarada Prasad; Li, Hongzhong

doi:10.1016/j.jobe.2019.101024

Cited by 87 publications

(60 citation statements)

References 15 publications

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“…In theory, the bio‐optical algorithm that Garver and Siegel () developed could be used to combine the optical data from different sensors, but the effect of an intermission difference in R rs would still propagate through the algorithm to the retrieved IOPs. Practically, due to differences in sensitivities, signal‐to‐noise ratios, calibration and degradation histories, observation times, data processing systems, observation geometries, weather conditions, and so on (Ahmad et al, ; Gordon & Voss, ; Gordon & Wang, ; Yuan et al, ), the radiance products observed from various satellites differ significantly, even for the same nominal band (Mélin et al, ).…”

Section: Introductionmentioning

confidence: 99%

An Inherent Optical Properties Data Processing System for Achieving Consistent Ocean Color Products From Different Ocean Color Satellites

Chen

Xing

et al. 2020

JGR Oceans

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We used field measurements and multimission satellite data to evaluate how well an inherent optical properties (IOPs) data processing system performed at correcting the residual error of the atmospheric correction in satellite remote sensing reflectance (R rs ) and how well the system simultaneously minimized intermission biases between different remote sensing systems. We developed the IOPs data processing system as a semianalytical algorithm called IDAS. Our results show that IDAS generates accurate and consistent IOPs products from two ocean color missions: Sea-viewing Wide Field-of-View Sensor (SeaWiFS) and Moderate Resolution Imaging Spectroradiometer Aqua (MODISA). Specifically, with "high-quality" SeaWiFS and MODISA R rs data, IDAS provided temporally consistent IOPs products for the oligotrophic open ocean resulting in an annual mean intermission difference of less than 3%, which is significantly lower than what a quasi-analytical algorithm (QAA) provided. We used IDAS to generate a long time series of b b (555) from the Northwest Atlantic Subtropical Gyre using SeaWiFS (1998SeaWiFS ( to 2002 and MODISA (2003MODISA ( to 2017 images. Our results show that the IDAS-derived annual b b (555) decreased monotonically by 2.81% per decade from 1998 to 2017. Comparing the IDAS-generated annual trend for b b (555) to the same data processed with the QAA algorithm, we found that the QAA results differed because of impacts of the residual errors of the atmospheric correction and intermission biases. The differences in the annual trends existed despite the same temporal changing patterns of in situ particulate organic carbon existing in the Sargasso Sea and in the satellite chlorophyll-a concentration in the Northwest Atlantic Subtropical Gyre.

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Section: Introductionmentioning

confidence: 99%

An Inherent Optical Properties Data Processing System for Achieving Consistent Ocean Color Products From Different Ocean Color Satellites

Chen

Xing

et al. 2020

JGR Oceans

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“…Currently, the test that is used most widely is the direct shear test, in which loading by a constantstiffness direct-shear instrument reflects the dynamic change of the normal stress at the PSI along with the normal displacement of the soil, which is consistent with the actual stress condition of pile-soil interaction. Some scholars also studied the stress characteristics between pileand soil through transparent soil and PIV technology (Yuan et al, 2016(Yuan et al, , 2019a(Yuan et al, ,b, 2020.…”

Section: Introductionmentioning

confidence: 99%

Factors Influencing the Mechanical Characteristics of a Pile–Soil Interface in Clay Soil

et al. 2020

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A series of direct shear tests using a large-scale constant-normal-stiffness direct-shear testing system was conducted to study the factors that influence the mechanical characteristics of a pile-soil interface (PSI) in clay soil. Interfaces of different roughness (R = 0, 2, 4, and 6 mm) were tested in clay soil with four different water contents with four normal stresses under different shear rates during shearing. Results for the interfacial shear behavior are presented as shear-stress-shear-strain curves, shear strength, and parameters. The results show that (i) the higher the roughness, the higher the shear strength of the PSI. The larger the normal stress, the smaller the roughness effect on the shear strength and parameters of the PSI; and (ii) the higher the water content of the clay soil, the lower the shear strength of the PSI, with maximum cohesion at a water content of 25%. The main influence that increasing the water content has on the shear strength of the PSI is changing the coherence, while the shear rate in this test range has less effect on the shear strength of the PSI. Overall, the mechanical characteristics of the PSI are influenced by roughness, water content, and shear rate, and close attention should be paid to those three factors when analyzing test results.

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“…In 1969, Peck [11] proposed a Gauss equation to predict the stratum deformation caused by shield tunneling. Subsequently, scholars at home and abroad have performed considerable theoretical research, numerical simulation, and model testing related to this problem [12][13][14][15][16]. Liu [17] established the original Peck formula.…”

Section: Introductionmentioning

confidence: 99%

Influence of shield tunnel construction on ground surface settlement under the condition of upper-soft and lower-hard composite strata

Lv¹,

Li²,

Fu³

et al. 2020

J. vibroeng.

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Taking the shield tunnel project of Guangzhou Metro Line 8 from Tongdewei Station to Shangbu Station as the research background, using the research method of finite element simulation and site monitoring, this paper analyses the influence rules of shield tunneling on ground subsidence under the condition of different hard rock height ratios. The research results show that in the process of crossing different hard rock height ratio composite stratum, as the hard rock height ratio decreases, the value of ground settlement decreases and settlement tank becomes shallow. The surface subsidence in different hard rock height ratio strata is obviously different, and the maximum difference is about 8.6 mm; The influence of the hard rock height ratio on the surface longitudinal settlement is mainly reflected in the position change of the beginning and the end of the settlement. With the increase of the hard rock height ratio, the shield construction reduces the amount of the surface longitudinal settlement and its influence range; Through the research, it is found that the hard rock height ratio in the 0-0.2 and 0.5-1 is the sensitive interval, and the settlement value in these two hard rock height ratio interval varies greatly. It is necessary to pay attention to the uneven settlement of the ground surface caused by shield construction in the sensitive hard rock height ratio interval. The research results of this paper can provide reference value for similar shield construction in upper soft and lower hard composite stratum.

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Investigation of 3D deformation of transparent soil around a laterally loaded pile based on a hydraulic gradient model test

Cited by 87 publications

References 15 publications

An Inherent Optical Properties Data Processing System for Achieving Consistent Ocean Color Products From Different Ocean Color Satellites

An Inherent Optical Properties Data Processing System for Achieving Consistent Ocean Color Products From Different Ocean Color Satellites

Factors Influencing the Mechanical Characteristics of a Pile–Soil Interface in Clay Soil

Influence of shield tunnel construction on ground surface settlement under the condition of upper-soft and lower-hard composite strata

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