TRANSVIB 2002 International Conference on Vibratory Pile Driving and Deep Soil Compaction

Bautechnik ◽  
2001 ◽  
Vol 78 (12) ◽  
pp. 909-909
Keyword(s):  
Soil Compaction ◽  
Pile Driving ◽  
Deep Soil ◽  
International Conference ◽  
Vibratory Pile Driving

scholarly journals Examination of the physical state of the soil under conventional and reduced tillage systems

2013 ◽  
pp. 183-186
Author(s):  
Géza Tuba
Keyword(s):  
Soil Moisture ◽  
Moisture Content ◽  
Soil Compaction ◽  
Soil Layer ◽  
Weather Conditions ◽  
Penetration Resistance ◽  
Conventional Tillage ◽  
Reduced Tillage ◽  
Deep Soil ◽  
Tillage Systems

he effect of reduced and conventional tillage systems on soil compaction and moisture content in two years with extreme weather conditions is introduced in this paper. The investigations were carried out in a long-term soil cultivation experiment set on a heavy textured meadow chernozem soil at the Karcag Research Institute. In 2010 the amount of precipitation during the vegetation period of winter wheat was 623.3 mm, 2.2 times higher than the 50-year average, while in 2011 this value was 188.7 mm giving only 65% of the average. The examinations were made after harvest on stubbles on 4 test plots in 5 replications in the case of each tillage system. Soil compaction was characterised by penetration resistance values, while the actual soil moisture contents were determined by gravimetry. The values of penetration resistance and soil moisture content of the cultivated soil layer were better in the case of reduced tillage under extreme precipitation conditions. It could be established that regular application of deep soil loosening is essential due to the formation of the unfavourable compact soil layer under 30 cm. Conventional tillage resulted in enhanced compaction under the depth of ploughing, the penetration resistance can reach the value of 4 MPa under wet, while even 8 MPa under dry soil status.

Experimental Study of Effects of Operation Parameters on Efficiency of Vibratory Pile Driving

2014 ◽  
Vol 580-583 ◽  
pp. 2272-2276 ◽  
Author(s):  
Hui Ping Zheng ◽  
Lin Chen ◽  
Wei Wang ◽  
Li Qiang Peng ◽  
Jia Yu Zhang
Keyword(s):  
Soil Samples ◽  
Exciting Force ◽  
Pile Driving ◽  
Signal Acquisition ◽  
Test Bed ◽  
Relative Compactness ◽  
Exciting Frequency ◽  
Common Application ◽  
Vibratory Pile Driving ◽  
Sample Time

Vibratory pile driving is a common application method of piles foundation construction. A test bed was designed and built according to the principle of vibratory pile driving. The test bed is composed of excitation system, machinery parts and signal acquisition system. At first soil samples with different relative compactness and different saturation were made. Then tests of vibratory pile driving have been done by using the soil samples and the test bed. For each soil sample, time of pile sinking to the bottom of the container was recorded respectively under the condition of the exciting force with same amplitude. The time represents efficiency of vibratory pile driving. The former is shorter and the latter is higher. Relationships between efficiency of vibratory pile driving and exciting frequency, relative compactness of soil, saturation of soil were researched respectively by single factor method. The experimental results have guide meaning to vibratory pile driving construction.

scholarly journals Field Tests to Investigate the Penetration Rate of Piles Driven by Vibratory Installation

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Zhaohui Qin ◽  
Longzhu Chen ◽  
Chunyu Song ◽  
Lei Sun
Keyword(s):  
Driving Force ◽  
Penetration Rate ◽  
Field Tests ◽  
Soil Conditions ◽  
Engineering Practice ◽  
Pile Driving ◽  
Slowing Down ◽  
Working Parameters ◽  
Shaft Friction ◽  
Vibratory Pile Driving

Factors directly affecting the penetration rate of piles installed by vibratory driving technique are summarized and classified into seven aspects which are driving force, resistance, vibratory amplitude, energy consumption, speeding up at the beginning, pile plumbness keeping, and slowing down at the end, from the mechanism and engineering practice of the vibratory pile driving. In order to find out how these factors affect the penetration rate of the pile in three major actors of vibratory pile driving: (i) the pile to be driven, (ii) the selected driving system, and (iii) the imposed soil conditions, field tests on steel sheet piles driven by vibratory driving technique in different soil conditions are conducted. The penetration rates of three different sheet pile types having up to four different lengths installed using two different vibratory driving systems are documented. Piles with different lengths and types driven with or without clutch have different penetration rates. The working parameters of vibratory hammer, such as driving force and vibratory amplitude, have great influences on the penetration rate of the pile, especially at the later stages of the sinking process. Penetration rate of piles driven in different soil conditions is uniform because of the different penetration resistance including shaft friction and toe resistance.

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