Study on wave propagation of dynamic compaction for ground improvement by considering nearby oil pipeline

2021 ◽  
Author(s):  
Bo Li ◽  
Dong-sheng Xu ◽  
Fu-guang Zhu ◽  
He Huang ◽  
Han-yang Liu ◽  
...  
Keyword(s):  
Wave Propagation ◽  
Ground Improvement ◽  
Dynamic Compaction ◽  
Oil Pipeline

Deep Dynamic Compaction: Practical and Cost-Effective Ground Improvement at the Port of Long Beach

Ports 2013 ◽  
2013 ◽  
Author(s):  
Mariusz P. Sieradzki ◽  
Bartlett W. Patton ◽  
Douglas J. Sereno ◽  
Paul Wehrlen
Keyword(s):  
Ground Improvement ◽  
Cost Effective ◽  
Dynamic Compaction ◽  
Long Beach

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.

scholarly journals Evaluation on Improvement Zone of Foundation after Dynamic Compaction

2021 ◽  
Vol 11 (5) ◽  
pp. 2156
Author(s):  
Chong Zhou ◽  
Chenjun Yang ◽  
Hui Qi ◽  
Kai Yao ◽  
Zhanyong Yao ◽  
...  
Keyword(s):  
Sandy Soil ◽  
Ground Improvement ◽  
Soil Improvement ◽  
Dynamic Compaction ◽  
Impact Point ◽  
Weak Zone ◽  
Factors Affecting ◽  
Improvement Effect ◽  
Drop Number ◽  
Highly Correlated

Dynamic compaction (DC) is one of the most popular methods for ground improvement. To solve the problem of the factors affecting the sandy soil improvement effect and estimate the effective improvement range under DC, the influences of drop number, drop energy, tamping distance, tamper radius, and drop momentum on the relative degree of improvement were investigated. Three normalized indicators Δδz,i, ΔδA,i, and ΔδU,i were derived to evaluate the weak zone and corresponding improvement effect. For multipoint tamping, it is found that the improvement depth and the improvement of the weak zone are highly correlated with drop energy and drop momentum, while the influence of the drop number and tamper radius is relatively smaller. The improvement of the weak zone and the improvement depth decrease with tamping distance, whereas the improvement area increases with tamping distance. The soil compacted by the previous impact point will be improved to a lesser extent with impact at subsequent impact points. It is also noted that drop energy had better not exceed the saturated drop energy in DC design. Based on the parametric study, a formula considering the various factors of DC was put forward, with the validation by two field cases of DC.

Experimental Analysis of Rolling Dynamic Compaction Using Transparent Soils and Particle Image Velocimetry

2021 ◽  
Author(s):  
Yue Chen ◽  
Mark B. Jaksa ◽  
Yien Lik Kuo ◽  
David Airey
Keyword(s):  
Particle Image Velocimetry ◽  
Particle Image ◽  
Ground Improvement ◽  
Dynamic Compaction ◽  
Scale Model ◽  
Operating Speed ◽  
Transparent Soil ◽  
Image Velocimetry ◽  
Scale Models ◽  
Fused Quartz

Rolling Dynamic Compaction (RDC) is a soil compaction technique, which is capable of improving thick layers of soil at a relatively fast operating speed. The paper presents the results of laboratory experiments conducted on 1:13 scale models of the 4-sided, 8- and 12-tonne, Broons BH-1300 and BH-1300 HD impact rollers to study the performance of the scale model at four different operating speeds. A series of laboratory tests are undertaken using transparent soils and the particle image velocimetry (PIV) technique to investigate the effectiveness of the models. The transparent soil employed in this study consists of fused quartz and a pore fluid which matched the refractive index of the fused quartz. A one-particle thick layer of coloured fused quartz is embedded in the centre plane of the transparent soil to visualise soil internal displacements and a digital camera is used to capture the speckled pattern during the scale model testing process. The results show that the heavier module induces greater soil displacements at each operating speed. The optimal operating speed is approximately 299 mm/s for both module weights. The most significant soil displacements occur within the first 20 passes and, no obvious ground improvement is observed after 35 passes. The results of this study demonstrate the unique capability of transparent soil to study soil displacements induced by the ground improvement scale models.

scholarly journals Dynamic Compaction of Sandy Soils in Kuwait – A Case Study

2021 ◽  
Author(s):  
By Nabil F. Ismael ◽  
◽  
Monera Al-Otaibi ◽  
Keyword(s):  
Ground Improvement ◽  
Ground Level ◽  
Shallow Foundation ◽  
Dynamic Compaction ◽  
Soil Pressure ◽  
Foundation Design ◽  
Economic Method ◽  
Before And After ◽  
New City ◽  
Penetration Tests

Ground improvement was required for construction of the Jaber Al Ahmed New City located about 25 km west of Kuwait City, Kuwait. Loose to medium poorly graded sands, and silty sands extended from ground level to a depth ranging from 5m to 9m. Dynamic compaction was employed, as an economic method, to increase the soil bearing capacity and reduce its compressibility for foundation design and construction. The testing program included borings and sampling, Standard Penetration Tests, Cone Penetration Tests and Pressuremeter Tests before and after dynamic compaction. The area covered in this study is about 31415m2. The results indicated significant ground improvement, and satisfaction of the specified acceptance criteria resulting in an allowable soil pressure, for shallow foundation design, equal to or exceeding 300 kN/m2.

scholarly journals Ground Improvement Using Dynamic Compaction in Sabkha Deposit

2019 ◽  
Vol 9 (12) ◽  
pp. 2506
Author(s):  
Joon-Shik Moon ◽  
Hyuk Sang Jung ◽  
Sungjune Lee ◽  
Su-Tae Kang
Keyword(s):  
Numerical Analysis ◽  
Bearing Capacity ◽  
Gulf Coast ◽  
Ground Improvement ◽  
Salt Content ◽  
Arabian Gulf ◽  
Dynamic Compaction ◽  
Energy Conditions ◽  
Coastal Sabkha ◽  
Field Dynamic

The sabkha soil spreads extensively in the Arabian Gulf Coast region. Sabkha is known as a geotechnically problematic soil because of its loose density, soft consistency, high salinity and water content, and occurrence of fine sands and clays. It is generally highly compressible and requires ground improvement for highway and railway construction. The purpose of this study is to provide a guideline for dynamic compaction to improve the bearing capacity of the coastal sabkha deposit. The ground behavior during dynamic compaction was evaluated for various compaction energy conditions using numerical analysis, and field dynamic compaction tests were also performed and compared with the numerical analysis results. It was found that the bearing capacity of sabkha deposit can be effectively improved by dynamic compaction. However, care must be taken to ensure that excessive porewater pressure is sufficiently dissipated during the application of dynamic compaction because the permeability is pretty low due to the high salt content in groundwater in the sabkha area.

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