A novel completely explicit algorithm to solve dynamic -p equations of saturated soil

2021 ◽  
Vol 141 ◽  
pp. 106452
Author(s):  
Chengshun Xu ◽  
Chaoqun Feng ◽  
Jia Song ◽  
Xiuli Du ◽  
Mi Zhao
Keyword(s):  
Saturated Soil ◽  
Explicit Algorithm

The diurnal change of temperature of air dried and water saturated soil

1951 ◽  
Vol 6 (3-4) ◽  
pp. 176-178
Author(s):  
S. ITO ◽  
M. KUSAKABE
Keyword(s):  
Saturated Soil ◽  
Diurnal Change ◽  
Water Saturated

A fully coupled particle method for dynamic analysis of saturated soil

2020 ◽  
Author(s):  
J. L. Mroginski ◽  
H. G. Castro ◽  
J. M. Podestá ◽  
P. A. Beneyto ◽  
A. R. Anonis
Keyword(s):  
Dynamic Analysis ◽  
Particle Method ◽  
Saturated Soil ◽  
Fully Coupled

Release of soil colloids increase the PFAS concentration from saturated soil during flow interruption

2021 ◽  
pp. 117297
Author(s):  
Annesh Borthakur ◽  
Brian K. Cranmer ◽  
Gregory P. Dooley ◽  
Jens Blotevogel ◽  
Shaily Mahendra ◽  
...  
Keyword(s):  
Saturated Soil ◽  
Flow Interruption ◽  
Pfas Concentration ◽  
Soil Colloids

scholarly journals The Brouwer invariance theorems in reverse mathematics

2020 ◽  
Vol 8 ◽  
Author(s):  
Takayuki Kihara
Keyword(s):  
Reverse Mathematics ◽  
Base System ◽  
Open Problems ◽  
Explicit Algorithm ◽  
Topological Embedding ◽  
Weak König’S Lemma ◽  
König’S Lemma

Abstract In [12], John Stillwell wrote, ‘finding the exact strength of the Brouwer invariance theorems seems to me one of the most interesting open problems in reverse mathematics.’ In this article, we solve Stillwell’s problem by showing that (some forms of) the Brouwer invariance theorems are equivalent to the weak König’s lemma over the base system ${\sf RCA}_0$ . In particular, there exists an explicit algorithm which, whenever the weak König’s lemma is false, constructs a topological embedding of $\mathbb {R}^4$ into $\mathbb {R}^3$ .

The relationship between Vs, Vp, density and depth based on PS-logging data at K-NET and KiK-net sites

2021 ◽  
Author(s):  
Fumiaki Nagashima ◽  
Hiroshi Kawase
Keyword(s):  
Standard Deviation ◽  
Seismic Velocity ◽  
Saturated Soil ◽  
P Wave ◽  
Soil Types ◽  
Depth Range ◽  
Velocity Inversion ◽  
Velocity Models ◽  
Regression Curves ◽  
Ps Logging

Summary P-wave velocity (Vp) is an important parameter for constructing seismic velocity models of the subsurface structures by using microtremors and earthquake ground motions or any other geophysical exploration data. In order to reflect the ground survey information in Japan to the Vp structure, we investigated the relationships among Vs, Vp, and depth by using PS-logging data at all K-NET and KiK-net sites. Vp values are concentrated at around 500 m/s and 1,500 m/s when Vs is lower than 1,000 m/s, where these concentrated areas show two distinctive characteristics of unsaturated and saturated soil, respectively. Many Vp values in the layer shallower than 4 m are around 500 m/s, which suggests the dominance of unsaturated soil, while many Vp values in the layer deeper than 4 m are larger than 1,500 m/s, which suggests the dominance of saturated soil there. We also investigated those relationships for different soil types at K-NET sites. Although each soil type has its own depth range, all soil types show similar relationships among Vs, Vp, and depth. Then, considering the depth profile of Vp, we divided the dataset into two by the depth, which is shallower or deeper than 4 m, and calculated the geometrical mean of Vp and the geometrical standard deviation in every Vs bins of 200 m/s. Finally, we obtained the regression curves for the average and standard deviation of Vp estimated from Vs to get the Vp conversion functions from Vs, which can be applied to a wide Vs range. We also obtained the regression curves for two datasets with Vp lower and higher than 1,200 m/s. These regression curves can be applied when the groundwater level is known. In addition, we obtained the regression curves for density from Vs or Vp. An example of the application for those relationships in the velocity inversion is shown.

On wave transmission in saturated soil system separated by a nonlinear isolated layer

2021 ◽  
Vol 136 ◽  
pp. 104211
Author(s):  
Song Xu ◽  
L.H. Tong ◽  
Changjie Xu ◽  
Haibin Ding
Keyword(s):  
Wave Transmission ◽  
Saturated Soil ◽  
Soil System

Analytical solution for longitudinal vibration of a floating pile in saturated porous media based on a fictitious saturated soil pile model

2021 ◽  
Vol 131 ◽  
pp. 103942
Author(s):  
Chunyi Cui ◽  
Kun Meng ◽  
Chengshun Xu ◽  
Zhimeng Liang ◽  
Haijiang Li ◽  
...  
Keyword(s):  
Porous Media ◽  
Analytical Solution ◽  
Longitudinal Vibration ◽  
Saturated Soil ◽  
Saturated Porous Media ◽  
Floating Pile ◽  
Pile Model

scholarly journals A Simulation Model for Shield Tunnelling and its Interactions with Partially Saturated Soil

PAMM ◽  
2009 ◽  
Vol 9 (1) ◽  
pp. 215-216 ◽  
Author(s):  
Felix Nagel ◽  
Janosch Stascheit ◽  
Günther Meschke
Keyword(s):  
Simulation Model ◽  
Saturated Soil ◽  
Partially Saturated ◽  
Shield Tunnelling ◽  
Partially Saturated Soil
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