Effect of previous stress history and vegetation on the coefficient of earth pressure at-rest, K0, in London clay

2014 ◽  
pp. 209-214 ◽  
Author(s):  
A Tsiampousi ◽  
I Vitsios ◽  
L Zdravković ◽  
D Potts
Keyword(s):  
Earth Pressure ◽  
Stress History ◽  
London Clay

Earth Pressures at Rest Related to Stress History

1965 ◽  
Vol 2 (1) ◽  
pp. 1-15 ◽  
Author(s):  
Elmer W Brooker ◽  
Herbert O Ireland
Keyword(s):  
Axial Stress ◽  
Earth Pressure ◽  
Lateral Strain ◽  
Cohesive Soils ◽  
Stress History ◽  
Chicago Clay ◽  
Liquidity Index ◽  
Shearing Resistance ◽  
History Of ◽  
London Clay

The influence of stress history on the coefficient of earth pressure at rest of remoulded cohesive soils was studied experimentally. A one-dimensional compression test cell and auxiliary controls which enabled the measurement of radial stresses under a condition of zero lateral strain was developed for this purpose. Radial pressures were measured throughout all stages of consolidation up to a maximum axial stress of 2,200 psi and subsequent rebound to zero stresses.Five cohesive soils, the properties of which are well documented, were selected for this study. These soils were: Chicago Clay, Goose Lake Flour, Weald Clay, London Clay, and Bearpaw Shale. 'The selected soils range in plasticity from low to high and cover a range of drained angles of shearing resistance from 15.5 degrees to 27.5 degrees. For testing purposes all soils were remoulded at a liquidity index of 0.5.For a pre-consolidation load of 2,200 psi and various values of the over-consolidation ratio, it was found that the coefficient of earth pressure at rest is related to both the drained angle of shearing resistance and the plasticity index. The coefficient of earth pressure at rest during rebound was found to be a function of the stress history of the soil as defined by the pre-consolidation load and over-consolidation ratio.

Effects of Stress Path and Stress History on the Stiffness of Reconstituted London Clay

1986 ◽  
Vol 2 (1) ◽  
pp. 139-144 ◽  
Author(s):  
J. H. Atkinson ◽  
J. S. Evans ◽  
D. Richardson
Keyword(s):  
Stress Path ◽  
Triaxial Tests ◽  
Soil Parameters ◽  
Stress History ◽  
Strain Behaviour ◽  
Reconstituted Soil ◽  
Path Dependent ◽  
London Clay ◽  
Soil Behaviour

AbstractSoil behaviour is stress history dependent and stress path dependent and soil parameters, particularly those for stress-strain behaviour, measured in conventional triaxial tests may not represent the behaviour of soil in many civil engineering works.To obtain more realistic parameters it may be necessary to conduct laboratory tests which more closely represent in situ conditions before and during construction.The paper describes equipment developed at The City University to carry out stress path tests simply and economically. A series of CU triaxial tests and stress path tests on reconstituted soil illustrate the dependence of measured soil parameters on stress history and stress path.

Monograph on the Fossil Reptilia of the London Clay

2009 ◽  
Author(s):  
Richard Owen ◽  
Thomas Bell
Keyword(s):  
London Clay

DISCUSSION ON GENERATION OF SEISMIC EARTH PRESSURE OF ABUTMENT

2018 ◽  
Vol 74 (4) ◽  
pp. I_341-I_350
Author(s):  
Kenichi SUZUKI ◽  
Hirofumi IKEMOTO ◽  
Taisuke SANAGAWA ◽  
Keita ABE ◽  
Hideaki TAKASAKI ◽  
...  
Keyword(s):  
Earth Pressure ◽  
Seismic Earth Pressure

Study of Seismic Design Method for Slope Supporting Structure of Soil Nailing

2013 ◽  
Vol 353-356 ◽  
pp. 2073-2078
Author(s):  
Tian Zhong Ma ◽  
Yan Peng Zhu ◽  
Chun Jing Lai ◽  
De Ju Meng
Keyword(s):  
Seismic Design ◽  
Calculation Method ◽  
Retaining Wall ◽  
Earth Pressure ◽  
Calculation Model ◽  
Soil Nailing ◽  
Case Record ◽  
Analysis And Design ◽  
Supporting Structure ◽  
Earthquake Action

Slope anchorage structure of soil nail is a kind of economic and effective flexible slope supporting structure. This structure at present is widely used in China. The supporting structure belong to permanent slope anchorage structure, so the design must consider earthquake action. Its methods of dynamical analysis and seismic design can not be found for the time being. The seismic design theory and method of traditional rigidity retaining wall have not competent for this new type of flexible supporting structure analysis and design. Because the acceleration along the slope height has amplification effect under horizontal earthquake action, errors should be induced in calculating earthquake earth pressure using the constant acceleration along the slope height. Considering the linear change of the acceleration along the slope height and unstable soil with the fortification intensity the influence of the peak acceleration, the earthquake earth pressure calculation formula is deduced. The soil nailing slope anchorage structure seismic dynamic calculation model is established and the analytical solutions are obtained. The seismic design and calculation method are given. Finally this method is applied to a case record for illustration of its capability. The results show that soil nailing slope anchorage structure has good aseismic performance, the calculation method of soil nailing slope anchorage structure seismic design is simple, practical, effective. The calculation model provides theory basis for the soil nailing slope anchorage structure of seismic design. Key words: soil nailing; slope; earthquake action; seismic design;

A Fast Estimation Method of Soil Discharged by an Earth Pressure Balanced Shield Machine

2021 ◽  
Author(s):  
Zhu Wen ◽  
Xuening Rong ◽  
Zhen Wang ◽  
Songtong Han ◽  
Ziming Xiong ◽  
...  
Keyword(s):  
Estimation Method ◽  
Earth Pressure ◽  
Fast Estimation ◽  
Shield Machine
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