Influence of Dynamic Loading Activation Time on Electro-osmotic Consolidation of Soft Soil

2019 ◽  
Vol 23 (11) ◽  
pp. 4687-4695 ◽  
Author(s):  
Xiaobing Li ◽  
Jianyu Shu ◽  
Jun Wang ◽  
Hongtao Fu ◽  
Peng Wang ◽  
...  
Keyword(s):  
Dynamic Loading ◽  
Soft Soil ◽  
Activation Time

Experiment and Analysis on Rheology Dynamic Characteristics of Soft Soil

2013 ◽  
Vol 275-277 ◽  
pp. 299-303
Author(s):  
Hua Hu ◽  
Xiao Xu Zheng
Keyword(s):  
Dynamic Characteristic ◽  
Dynamic Loading ◽  
Dynamic Characteristics ◽  
Geotechnical Engineering ◽  
Soft Soil ◽  
Loading Frequency ◽  
Research Results ◽  
Sinusoidal Variation ◽  
Marine Deposit

The rheologic action of the soft soil could be accelerated by earthquake the dynamic loading, which induces more geotechnical engineering accidents and geologic disasters. The samples of marine deposit soft soil are collected in xiamen, and the rheologic rate, rheologic acceleration and rheologic strain under the dynamic loading of sinusoidal variation are tested and analyzed by using dynamic-triaxial device, and the influences of dynamic loading frequency and breadth to dynamic characteristics of soft soil are contrasted and analyzed. The research results have important academic signification for us to search rheologic dynamic characteristic of soft soil under dynamic loading.

The Responses of Soft Ground Materials Subjected to Dynamic Loading

2012 ◽  
Vol 591-593 ◽  
pp. 977-981
Author(s):  
Jun He ◽  
Bing Bai ◽  
Quan Fei Chen
Keyword(s):  
Pore Pressure ◽  
Dynamic Loading ◽  
Soft Soil ◽  
Soil Layer ◽  
Ground Surface ◽  
Vertical Displacement ◽  
Dynamic Compaction ◽  
Soft Ground ◽  
Soil Foundation ◽  
Soft Soil Foundation

The responses of saturated soft soil foundation under dynamic loading are analyzed using numerical method. The distributions of pore pressure in space are given, and the variations of pore pressure with time are also discussed. Besides, the distributions of vertical stresses and vertical displacement are also given. Studies show that during the period of dynamic loading, the pore pressure and stress in soil layer grows very fast, and also decreases rapidly in the unloading phase. With the increase of dynamic compaction time, the locations of the maximum values gradually move down. Moreover, the pore pressure and stress gradually decreases with the increase of the distance away from hammer point. On the other hand, the tamping pit in ground surface under dynamic loading has a larger settlement, and furthermore decreases with the increase of depth.

Composite Tangent-Exponent Model for Skeleton Stress-Strain Curve of Soft Soil under Dynamic Loading

2010 ◽  
Vol 108-111 ◽  
pp. 1092-1096
Author(s):  
Wei Wang ◽  
Hua Ling ◽  
Shun De Xu ◽  
Xiao Ni Wang
Keyword(s):  
Dynamic Loading ◽  
Soft Soil ◽  
Strain Curve ◽  
Exponential Model ◽  
Stress Index ◽  
Hyperbolic Model ◽  
Stress Strain Curve ◽  
Stress Strain ◽  
New Model ◽  
Skeleton Stress

Mathematical model for skeleton stress-strain curve under dynamic loading (SSSC) is one important issue to study the dynamic behavior of soft soil. Based on mechanism of developing process, primary mathematical behavior that SSSC model should meet is analyzed. Mathematical investigation on two conventional SSSC models, namely hyperbolic model and exponential model, is conducted. Dynamic stress index is proposed and employed to signalize the shortcomings of two conventional models. A composite tangent-exponent model for SSSC with three parameters is established, which is a monotone increasing and up limited function. The new model can overcome conventional shortcomings. Finally, good agreement between investigated and new model fitted data has been found out.

Testing and Analysis on Dynamic Rheologic Characteristics of Soft Soil under Different Breadth Conditions of Dynamic Loading

2013 ◽  
Vol 838-841 ◽  
pp. 737-740
Author(s):  
Hua Hu
Keyword(s):  
Dynamic Loading ◽  
Dynamic Stress ◽  
Slow Growth ◽  
Dynamic Condition ◽  
Soft Soil ◽  
Soft Rock ◽  
Dynamic Strain ◽  
Theoretic Analysis ◽  
Research Results ◽  
Mechanics Characteristic

The practical investigating and theoretic analysis Indicates that the rheologic action of the soft rock-soil could be accelerated by the dynamic loading, which induces more geotechnical engineering accidents and geologic disasters. The samples of marine deposit soft soil are collected in xiamen, and the dynamic stress-strain, the rheologic strain-time etc rheologic characteristics curves under the different breadth of dynamic loading of sinusoidal variation are tested using dynamic-triaxial device. The rheologic characteristics, rheologic rate and rheologic acceleration varietal process of four different breadths are analyzed. The research results indicate that all the samples are the same varietal process from decelerate rheology, relatively stable rheology to accelerate rheology stage. The dynamic strain slow growth and the rheologic process is relatively stable when the breadth of dynamic loading is low stress ranges of 10~20kPa.When the breadth of dynamic loading exceed 40kPa, the dynamic strain rapid growth and the rheologic is accelerate process till the samples destroy. The research results have academic and actual signification for us to open out the dynamic rheologic mechanics characteristic, explore the accelerating rheologic laws and the rheologic destabilizing dynamic condition of soft rock-soil under dynamic loading.

Research on Dynamic Rheological Parameters and Rheological Model of Soft Soil

2011 ◽  
Vol 261-263 ◽  
pp. 1070-1073
Author(s):  
Hua Hu ◽  
Meng Yun Zhu
Keyword(s):  
Dynamic Loading ◽  
Rheological Model ◽  
Soft Soil ◽  
Dynamic Mechanism ◽  
Rheological Parameters ◽  
Geological Disaster ◽  
Rheological Character ◽  
Mechanism Of Landslide

The soft soil is covered widely in China. Soft soil has obvious rheological character, it will induce landslide etc serious geologic disasters, and make severe threaten to stability and security of projects. The dynamic loading such as earthquake, raging billow, vibration are the important factors and mainly power of inducing landslide geological disaster. The rheological parameters of soft soil are tested and analyzed under dynamic loading, and the rheological model of soft soil is established. All these have important theory and actual signification for us to reveal rheological dynamic mechanism of landslide geological disaster under dynamic loading.

scholarly journals Simulation of the influence of dynamic loading on the stress-strain state of the natural and geoengineering environment

2021 ◽  
Vol 280 ◽  
pp. 01008
Author(s):  
Natalya Remez ◽  
Alina Dychko ◽  
Vadym Bronytskyi ◽  
Tetiana Hrebeniuk ◽  
Rafael Bambirra Pereira ◽  
...  
Keyword(s):  
Dynamic Loading ◽  
Strain State ◽  
Soft Soil ◽  
Maximum Load ◽  
The Body ◽  
Creep Model ◽  
Stress Strain ◽  
Stress Strain State ◽  
The Impact ◽  
Underlying Soil

The paper provides numerical simulation of the influence of dynamic loading on the stress-strain state of the natural and geoengineering technogenic environment taking into account the soil basis for forecasting its use as the basis of the structure. Paper demonstrates the impact of static and dynamic loading on the subsidence of the landfill. To take into account the liquid phase of the waste and the viscoplastic medium, Darcy's law is used as an equation of balance of forces. The body of the landfill is modeled by weak soil taking into account the creep, using the Soft Soil Creep model. The covering and underlying soil layers are described by the Coulomb – Mohr model. An effective method for calculating the sedimentation of natural and geoengineering environment on the example of a solid waste landfill, based on numerical modeling of the stress-strain state of the landfill and underlying soil using finite elements is developed. It is demonstrated that the largest subsidence is experienced by the landfill with sand, as the base soil, but in percentage terms the amount of subsidence with the maximum load relative to the initial subsidence without loading is the largest in clay (33.7%). The obtained results must be taken into account when using landfills as a basis for buildings, structures, routes, recreational areas, etc.

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