Numerical Analysis of Ground Displacement and Pile Response Due to Tunneling in Soft Soil Considering the Creep Behavior

2018 ◽  
pp. 121-130
Author(s):  
Yu Pan ◽  
Jun-Jie Zheng ◽  
Lan Cui ◽  
Rong-Jun Zhang
Keyword(s):  
Numerical Analysis ◽  
Creep Behavior ◽  
Soft Soil ◽  
Ground Displacement ◽  
Pile Response

Tunneling influence zones for adjacent existing pile foundation in soft soil developed by numerical analysis

2013 ◽  
pp. 633-640
Author(s):  
P Jongpradist ◽  
A Sawatparnich ◽  
S Youwai ◽  
J Sunitsakul ◽  
W Kongkitkul ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Pile Foundation ◽  
Soft Soil

scholarly journals Experiment Study of Lateral Unloading Stress Path and Excess Pore Water Pressure on Creep Behavior of Soft Soil

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Wei Huang ◽  
Kejun Wen ◽  
Dongsheng Li ◽  
Xiaojia Deng ◽  
Lin Li ◽  
...  
Keyword(s):  
Pore Water ◽  
Creep Behavior ◽  
Pore Water Pressure ◽  
Water Pressure ◽  
Soft Soil ◽  
Stress Path ◽  
Deviatoric Stress ◽  
Excess Pore Water Pressure ◽  
Pore Water Pressures ◽  
Excess Pore

The unloading creep behavior of soft soil under lateral unloading stress path and excess pore water pressure is the core problem of time-dependent analysis of surrounding rock deformation under excavation of soft soil. The soft soil in Shenzhen, China, was selected in this study. The triaxial unloading creep tests of soft soil under different initial excess pore water pressures (0, 20, 40, and 60 kPa) were conducted with the K0 consolidation and lateral unloading stress paths. The results show that the unloading creep of soft soil was divided into three stages: attenuation creep, constant velocity creep, and accelerated creep. The duration of creep failure is approximately 5 to 30 mins. The unloading creep behavior of soft soil is significantly affected by the deviatoric stress and time. The nonlinearity of unloading creep of soft soil is gradually enhanced with the increase of the deviatoric stress and time. The initial excess pore water pressure has an obvious weakening effect on the unloading creep of soft soil. Under the same deviatoric stress, the unloading creep of soft soil is more significant with the increase of initial excess pore water pressure. Under undrained conditions, the excess pore water pressure generally decreases during the lateral unloading process and drops sharply at the moment of unloading creep damage. The pore water pressure coefficients during the unloading process were 0.73–1.16, 0.26–1.08, and 0.35–0.96, respectively, corresponding to the initial excess pore water pressures of 20, 40, and 60 kPa.

The Numerical Analysis of CFG Pile Technology in the Disposing Soft Foundation in GuangWu Expressway

2011 ◽  
Vol 90-93 ◽  
pp. 2096-2100
Author(s):  
Yun Mei Meng ◽  
Yun Cao
Keyword(s):  
Numerical Analysis ◽  
Soft Soil ◽  
Influence Factors ◽  
Computational Results ◽  
Soft Foundation ◽  
Soil Foundation ◽  
Soft Soil Foundation ◽  
Cfg Pile

The problem of disposing the soft soil foundation will appear inevitably during the construction of modem high way. There are many ways to dispose the soft foundation. One of those is CFG pile technology. Take the CFG pile technology in the GuangWu Expressway for example, the influence factors of embankment settlement were discussed in detai by numerical analysis, some useful conclusions are obtained from the computational results.

scholarly journals Numerical analysis of a heat exchanger pile response in a Brazilian subtropical region

2020 ◽  
Vol 205 ◽  
pp. 05004
Author(s):  
Roberto Pimentel de Sousa Júnior ◽  
Renato Pinto da Cunha
Keyword(s):  
Heat Exchanger ◽  
Numerical Analysis ◽  
Thermal Response ◽  
Electrical Energy ◽  
Optimal Configuration ◽  
Subtropical Climate ◽  
Exchange Performance ◽  
Energy Piles ◽  
The University ◽  
Pile Response

Ground-coupled heat exchanger systems have been used as acclimatization systems for residential and commercial buildings in many countries. Brazil is the ninth largest consumer of electrical energy in the world, for this reason, local researchers are investigating the use of the energy piles in order to reduce the consumption of electricity. Thermal response tests have been carried out on a heat exchanger pile at the geotechnical experimental site of the University of São Paulo in São Carlos city, a region of subtropical climate. Simultaneously, using the thermal properties obtained in these tests, numerical analysis has been performed to investigate the heat exchange performance of energy piles installed in this site. For this numerical analysis, the effect of soil and concrete properties, pile geometry and the flow rate on the pile thermal response were evaluated. The current paper presents the results obtained by the analysis of 67 models tested to found an optimal configuration of an energy pile through the software COMSOL, using Heat Transfer and Non-Isothermal Pipe Flow modules. From this work, it was observed that the optimal configuration was obtained for a turbulent flow condition in piles in the heat exchanger pipes.

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