SEISMIC EVALUATION MODEL TEST OF COUPLED PILES WITH ITS INTERMEDIATE SOIL IMPROVEMENT METHOD IN SHEET PILE QUAY WALLS

2019 ◽  
Vol 75 (2) ◽  
pp. I_569-I_574
Author(s):  
Ryota NATSUSAKA ◽  
Eiji KOHAMA ◽  
Hirotaka ITO ◽  
Satoshi MATSUMURA ◽  
Takaaki MIZUTANI ◽  
...  
Keyword(s):  
Model Test ◽  
Evaluation Model ◽  
Soil Improvement ◽  
Sheet Pile ◽  
Seismic Evaluation ◽  
Improvement Method

Development of in-Situ Soil Improvement Method using Collapsible Mixing Blades

2012 ◽  
Author(s):  
Hiroyasu Ishii ◽  
Tadafumi Fujiwara ◽  
Makiko Kobayashi ◽  
Tomoyuki Aoki ◽  
Hidetake Matsui ◽  
...  
Keyword(s):  
Soil Improvement ◽  
Improvement Method

INNOVATIVE SOFT SOIL IMPROVEMENT BY VACUUM DE-WATERING AND DYNAMIC COMPACTION

2016 ◽  
Vol 3 (1) ◽  
Author(s):  
Tuncer B. Edil
Keyword(s):  
Large Scale ◽  
Ground Improvement ◽  
Soft Soil ◽  
High Vacuum ◽  
Cohesive Soil ◽  
Soil Improvement ◽  
Economic Benefits ◽  
Dynamic Compaction ◽  
Environmental Benefits ◽  
Improvement Method

Recently, an innovative soft soil improvement method was advanced in China by integrating and modifying vacuum consolidation and dynamic compaction ground improvement techniques in an intelligent and controlled manner. This innovative soft soil improvement method is referred to as “High Vacuum Densification Method (HVDM)” to reflect its combined use of vacuum de-watering and dynamic compaction techniques in cycles. Over the past ten years, this innovative soft soil improvement technique has been successfully used in China and Asia for numerous large-scale soft soil improvement projects, from which enormous time and cost savings have been achieved. In this presentation, the working principles of the HVDM will be described. A discussion of the range of fine-grained, cohesive soil properties that would make them ideal for applying HVDM as an efficient ground improvement method will be discussed. The economic benefits and environmental benefits of HVDM are elucidated.

Model Test of Using Vacuum Preloading to Improve Dredge

2011 ◽  
Vol 374-377 ◽  
pp. 1908-1911
Author(s):  
Shu Wang Yan ◽  
Qun Hua Zhou ◽  
Li Qiang Sun
Keyword(s):  
Water Content ◽  
Model Test ◽  
Land Reclamation ◽  
Ground Surface ◽  
Soil Improvement ◽  
Field Investigation ◽  
Vacuum Preloading ◽  
Undrained Strength ◽  
Soil Foundation

Dredge materials with the water content more than 80% have been used for land reclamation in Tianjin, China. The dredge is transferred by pipeline to the reclamation place and then strengthened with the vacuum preloading technique. It has been found that with the thickness of the filled dredge layer becomes larger and larger, the quality of soil improvement is not as good as expected. Field investigation shows that after vacuum preloading the vane test strength can reach 50kPa at the ground surface, but decreases along with depth dramatically. The model test is carried out to detect the factors that may influence the efficiency of using vacuum preloading to improve dredge soil foundation. The water content, vacuum pressure and undrained strength are measured during the test.

CENTRIFUGAL MODEL TEST ON PASSIVE RESISTANCE MECHANISM OF STEEL PIPE SHEET PILES WITH SOIL IMPROVEMENT

2021 ◽  
Vol 77 (2) ◽  
pp. I_397-I_402
Author(s):  
Daiki TAKANO ◽  
Yoshiyuki MORIKAWA ◽  
Yuri SUGIYAMA ◽  
Yasunari MATSUO ◽  
Yoshiaki HAMANO ◽  
...  
Keyword(s):  
Model Test ◽  
Resistance Mechanism ◽  
Soil Improvement ◽  
Steel Pipe ◽  
Passive Resistance ◽  
Centrifugal Model Test ◽  
Centrifugal Model
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