REVIEW ON PENETRATION MECHANISM AND APPLICATION OF BALL PENETROMETER IN OFFSHORE ENGINEERING
YANG Yan1,2, LIU Songyu1,2, CAI Guojun1,2, PENG Peng1,2, ZHENG Jinhuo3, JIANG Tao3
1. Institute of Geotechnical Engineering, Southeast University, Nanjing 210096;
2. Jiangsu Key Laboratory of Urban Underground Engineering and Environmental Safety(Southeast University), Nanjing 210096;
3. Fujian Institute of Architectural Design and Research, Fuzhou 350100
In recent years, with the development of global marine strategies, engineering construction and experimental studies have been increasingly carried out in both offshore and onshore. In order to evaluate the soil properties on the seabed, the cone penetration test(CPT)technology has become much more important in the domestic and international marine engineering. This paper summarizes the development of marine cone penetration test according to extensive literatures domestic and oversea. Besides, the relevant research contents of the ball penetrometer are summarized. The ball penetrometer is now used oversea for offshore site characterization in soft sediments as an alternative or supplement to conventional CPT tests. The analytical results show that the ball penetrometer is superior to the cone in quantifying the strength of soft clay, as well as evaluating the remoulded strength and the effect of penetration velocity by means of cyclic remoulding tests and variable rate penetrometer tests. Based on the full-flow mechanism, it is worthwhile to compare the in situ testing data between ball penetrometer and CPT.Furthermore given the nature of soft soil at seabed, this paper introduces a stoppable piezoprobe at shallow depths for offshore engineering.
. REVIEW ON PENETRATION MECHANISM AND APPLICATION OF BALL PENETROMETER IN OFFSHORE ENGINEERING[J]. Journal of Engineering Geology, 2017, 25(6): 1603-1609.
Boylan N,Long M,Ward D,et al. 2007. Full flow penetrometer testing in Bothkennar clay[C]//Proceedings of the 6th International Conference on Offshore Site Investigation and Geotechnics. London:Underwater Technology:177~186.
Cai G J,Liu S Y,Tong L Y,et al. 2009. Assessment of direct CPT and CPTU methods for predicting the ultimate bearing capacity of single piles[J]. Engineering Geology, 104 (3-4):211~222.
Cai G J,Yang Y,Zou H F. 2017. A stoppable spherical cylindrical hole pressure probe[P].China. CN201510946159.7.
Chung S F,Randolph M F. 2004. Penetration resistance in soft clay for different shaped penetrometers[C]//Proceedings of ISC-2 on Geotechnical and Geophysical Site Characterization. Rotterdam:Millpress:671~678.
Chung S F,Randolph M F,Schneider J A. 2006. Effect of penetration rate on penetrometer resistance in clay[J]. Journal of Geotechnical and Geoenvironmental Engineering, 132 (9):1188~1196.
Colreavy C,O'Loughlim C D,Long M,et al. 2010. Field experience of the piezoball in soft clay[C]//Proceedings of the 2nd International Symposium on Cone Penetration Testing. California:Polytechnic University:2 & 3:1~15.
Dejong J T,Yafrate N J,Degroot D J,et al. 2004. Evaluation of the undrained shear strength profile in soft layered clay using full-flow probes[C]//Proceedings of the 2nd International Symposium on Site Characterization. Rotterdam:Millpress:679~686.
Dejong J T,Yafrate N J,Degroot D J. 2011. Evaluation of undrained shear strength using full-flow penetrometers[J]. Journal of Geotechnical and Geoenvironmental Engineering, 137 (1):14~26.
Einav I,Randolph M F. 2005. Combining upper bound and strain path methods for evaluating penetration resistance[J]. International Journal for Numerical Methods in Engineering, 63 (14):1991~2016.
Fan Q L,Luan M T,Liu Z G. 2009. Numerical simulation of penetration resistance of T-bar penetrometer in soft clay[J]. Rock and Soil Mechanics, 30 (9):2850~2854.
House A R,Oliveira J R,Randolph M F. 2001. Evaluating the coefficient of consolidation using penetration tests[J]. International Journal of Physical Modeling in Geotechnics, 1 (3):17~25.
Jiang Y Y. 2012. The study of cone penetration testing methods and the application in offshore engineering[D]. Tianjin:Tianjin University.
Kelleher P J,Randolph M F. 1998. Seabed geotechnical characterization with the portable remotely operated drill[C]//Proceedings of the International Symposium on Frontiers in Offshore Geotechnics. Perth:University of Western Australia:365~371.
Low H E,Randolph M F,Lunne T,et al. 2011. Effect of soil characteristics on relative values of piezocone, T-bar and ball penetration resistances[J]. Géotechnique, 61 (8):651~664.
Lunne T. 2010. The CPT in offshore soil investigations-a historic perspective[C]//Proceedings of the 2nd International Symposium on Cone Penetration Testing. California:Polytechnic University.
Lunne T,Andersen K H,Eng L H,et al. 2011. Guidelines for offshore in situ testing and interpretation in deepwater soft clays[J]. Canadian Geotechnical Journal, 48 (4):543~556.
Mahmoodzadeh H,Wang D,Randolph M F. 2015. Interpretation of piezoball dissipation testing in clay[J]. Géotechnique, 65 (10):831~842.
Martin C M,Randolph M F. 2006. Upper-bound analysis of lateral pile capacity in cohesive soi1[J]. Géotechnique, 56 (2):141~146.
Meng G T,Zhang D B,Liu S L,et al. 2000. The significance of piezocone penetration test[J]. Chinese Journal of Geotechnical Engineering, 22 (3):314~318.
Randolph M F,Hefer P A,Geise J M,et al. 1998. Improved seabed strength profiling using T-bar penetrometer[C]//International Conference on Offshore Site Investigation and Foundation Behaviour-"New Frontiers". London:Society for Underwater Technology:221~235.
Randolph M F. 2000. Effect of strength anisotropy on capacity of foundations[C]//Proceedings of the International Symposium on John Booker Memorial. Sydney:University of Western Australia:313~328.
Randolph M F,Martin C M,Hu Y. 2000. Limiting resistance of a spherical penetrometer in cohesive material[J]. Géotechnique, 50 (5):573~582.
Randolph M F,Jamiolkowski M B,Zdravkovi L. 2004. Load carrying capacity of foundations[C]//Proceedings of Skempton Memorial Conference. London:207~240.
Randolph M F. 2013. Analytical contributions to offshore geotechnical engineering[C]//Proceedings of the 18th International Conference on Soil Mechanics and Geotechnical Engineering, Paris. London:Taylor & Francis:85~105.
Shen X K,Cai Z Y,Cai G J. 2016. Applications of in-situ tests in site characterization and evaluation[J]. China Civil Engineering Journal, 49 (2):98~120.
Stewart D P,Randolph M F. 1991. A new site investigation tool for the centrifuge[J]. Journal of Geotechnical Engineering, 120 (12):2230~2235.
Yafrate N J,Dejong J Y,et al. 2009. Evaluation of remolded shear strength and sensitivity of soft clay using full-flow penetrometers[J]. Journal of Geotechnical and Geoenvironmental Engineering, 135 (9):1179~1189.
Zhou H,Randolph M F. 2009. Resistance of full-flow penetrometers in rate-dependent and strain-softening clay[J]. Géotechnique, 59 (2):79~86.