Prediction of pile running during the driving process of large diameter pipe piles

Sun, Liqiang; Jia, Tianqiang; Yan, Shuwang; Wei, Guo; Ren, Yuxiao; Lei, Zhenming

doi:10.1016/j.oceaneng.2016.10.023

Cited by 15 publications

(4 citation statements)

References 12 publications

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“…This could result in significant savings in cost and time, where the number of piles and splicing work could be reduced. Comparable to reports by Sun et al [2] in their work on large diameter pipe piles installed for offshore structures, pile-splicing incurs extra construction time while disturbing the pile driving process, resulting in intrinsic changes of the soil fabric with rapid dissipation of pore pressure [3], leading to a surge in shear strength of the soil resisting the driving force and signaling premature penetration refusal [4].…”

Section: Introductionmentioning

confidence: 86%

Improved Soil-Pile Interaction of Floating Pile in Sand With Shaft Treatment

Chan¹

2017

GEOMATE

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ABSTRACT:The present study explored the efficacy of pile shaft surface treatment on the improvement of soil-pile frictional resistance for floating or friction piles. 4 surface conditions of model piles measuring 200 mm long and 20 mm in diameter were examined, namely smooth (control), roughened, fishbone and checked shafts. A pile cap made of plywood was fixed to the top of the pile with 10 mm embedment depth, leaving 190 mm clearance for installation in the sand bed. The test chamber was a see-through glass tank with a footprint of 100 mm x 200 mm and 300 mm height. Coarse sand of D50 = 1.5 mm were loosely placed in the chamber by layers up to 200 mm height before the piles were installed either in single or triple group formations. The incremental load test of conducted via application of dead load ranging between 0.01-0.08 kPa on the pile cap, and the corresponding settlement was recorded. The test results revealed settlement to be reduced by the piles in the order of roughened > fishbone > checked > smooth for the single pile configuration, with maximum reduction of 40 % recorded by the roughened pile. As for the pile group, settlement reduction of the piles with surface treatment clearly outperformed the control pile by almost 50 %, though differences between the former were marginal with seemingly overlapping stress-strain plots. All in all the surface treatment of pile shaft enhanced the shaft friction for the piles installed in sand, but field implementation would require further examination of the pile-driving efficiency as the improved piles could cause additional resistance during installation.

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Section: Introductionmentioning

confidence: 86%

Improved Soil-Pile Interaction of Floating Pile in Sand With Shaft Treatment

Chan¹

2017

GEOMATE

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“…In the table, the value of n is (W + W p × e 2 )/(W + W p ). Taking L = 76 m as an example, the calculated final set is In the Hiley formula, n is the efficiency of the blow, which represents the ratio of energy after impact to the striking energy of the ram [31,32]. The expression is as follows:…”

Section: The Calculation Of the Final Set (S)mentioning

confidence: 99%

Research on Dynamic Pile-Driving Formula Parameters and Driving Feasibility of Extra-Long PHC Pipe Piles

et al. 2023

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Prestressed high-strength concrete (PHC) pipe pile has the advantages of high single pile bearing capacity, a wide range of applications, good driving resistance, fast construction speed, etc. It has been widely used in high-rise buildings, bridges, ports, and other industries. The application of extra-long PHC pipe piles with a length of more than 50 m is increasing. However, there are few studies on the drivability and hammering criteria of extra-long PHC piles. To analyze the drivability of extra-long piles and predict their bearing capacity, in this paper, high-strain dynamic tests were carried out on 14 test sections with the pile foundation of Temburong Bridge in Brunei as the research background. The hammer stop control criteria calculated according to the Hiley formula would lead to excessive hammering. Three types of damage occurred during construction: pile shaft breakage, weld tearing, and pile head breakage. The weight and drop height of the piling hammer selected for this project were appropriate, and the extra-long test piles can be hammered to the design depth. The values of Cp (Compression of the pile) and n (the efficiency of the blow) were fitted based on the dynamic test data, which provided a more accurate reference for the selection of subsequent piling parameters of the project. It provides a more accurate calculation method for predicting the bearing capacity of extra-long PHC piles and provides control criteria for pile stopping and a scientific basis for their design and construction.

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“…Numerous studies have been conducted to examine the compressive loaded piles including encompassing H-steel piles, pretensioned spun high-strength concrete (PHC) piles, and cast in situ piles with postgrouting [3][4][5][6][7]. Most of the research has focused on the behaviour of these piles with respect to different geotechnical conditions, driving process, analytical method, theoretical load transfer method, and finite element method [8][9][10][11][12][13]. Previous investigations also include the selfbalanced testing method, determination of the effective length, effect of soil stiffness and negative skin friction of the large diameter, and supper-long pile foundation [9,[14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Field Tests of Super-Long and Large-Diameter Drilled Shaft Pile Foundations

Wang

Ding

Zhou

et al. 2020

Advances in Civil Engineering

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This study investigated the compressive behaviour of super-long pile foundations with large diameters. Three 52 m, 73 m, and 83 m long piles with a diameter of 1500 mm, 1500 mm, and 1800 mm were cast and tested, respectively. Given that large loading was required, an improved compressive static load test was introduced, and the load transfer mechanism, shaft resistance development, and distribution were analysed. This study found that the transferred load decreased along the pile during each applied load, but the gradients were different. For most layers, when increasing the load, the shaft resistance developed in the upper layers first, while the shaft resistance from the lower part did not always fully develop. Moreover, the “mutual compensation” phenomenon was discovered, which was when the shaft softening occurred from one soil layer, the shaft hardening of the other soil would occur simultaneously. Under consideration of the soil layer differences around these piles, it was recommended that shaft and base grouting should be applied on 52 m and 73 m piles, while only shaft grouting should be applied on the 83 m pile. For this longest pile design, whose toe resistance was discovered to be very small, increasing the pile length was not appropriate; thus, it was preferable to increase the pile diameter to increase the ultimate bearing capacity.

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Prediction of pile running during the driving process of large diameter pipe piles

Cited by 15 publications

References 12 publications

Improved Soil-Pile Interaction of Floating Pile in Sand With Shaft Treatment

Improved Soil-Pile Interaction of Floating Pile in Sand With Shaft Treatment

Research on Dynamic Pile-Driving Formula Parameters and Driving Feasibility of Extra-Long PHC Pipe Piles

Field Tests of Super-Long and Large-Diameter Drilled Shaft Pile Foundations

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