Model Test Research on Horizontal Bearing Characteristics of Close-Ended Valibale Section Pipe Pile

Abstract:

Base on indoor model tests of three variable section pipe piles and two constant section pipe piles performed in foundation pit,the load transfer mechanism of two kinds of close-ended pipe piles are studied by comparing horizontal load-displacement curves, critical load and bending moment of piles. Results show that horizontal load-displacement curves change slowly and horizontal bearing capacity of valiable section pipe piles will be higher than constant section pipe piles with equal average diameters.Comparing with constant section pipe piles 1# and 2# with equal average diameters, unit volume horizontal critical bearing capacity of 3# and 4# are improved 8.7% and 34.2% respectively and which have different degrees of increse with improvement of valiable section ratio. Moreover,there are two maximum bending moment to valialble section pipe piles insteard of one to constant section pipe piles.To pipe piles 3#,4# and 5#, maximum bending moment ratio of big diameter pipe to small diameter pipe of valiable section pipe pile are 3.13、2.33 and 1.89 respectively. To pipe piles 3# and 4#, maximum bending moments of big diameter pipe are improved 26.8% and 28.4%.Howeverm,maximum bending moment of small diameter pipe are improved 54.1% and 111.8%.So,it is very clear that valiable section pipe pile is more reasonable than constant section pipe pile in bearing characteristics.

• Periodical: Applied Mechanics and Materials (Volumes 638-640)
• Pages: 475-479
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.638-640.475
• Online since: September 2014
• Authors: Qing Guang Yang*, Yi Han Chen, Jie Tian, Jie Liu
• Keywords: Constant Section Pipe Pile, Horizontal Static Load Test, Valiable Section Pipe Pile

References

[1] H. Matlock. Correlation for design of laterally loaded piles in soft clay preprints: second annual offshore technology conference , Vol. 1(1970), pp.1220-1248.

DOI: 10.4043/1204-ms

[2] L.C. Reese, and R.C. Welch. Lateral loading of deep foundations in stiff clay, Journal geotechnical engineering division. American society of Civil Engineering , Vol. 11(1975), pp.633-649.

DOI: 10.1061/ajgeb6.0000177

[3] J.H. Wang J.J. Chen,X. Ke. Characteristics of large diameter rock-socketed piles under lateral loads. Chinese Journal of Geotechnical Engineering, Vol. 8(2007), p.1194–1198.

[4] X. Chen J.Z. Sun X.B. Cai. Horizontal static loading test and analyses of internal force and distortion on single pile. Rock and Soil Mechanics, Vol. 31(2010), pp.754-759.

[5] H.L. Liu J.W. Zhang,J. Peng. Full-scale model test on behavior of cast-in-place concrete pipes with large diameter under lateral loads. Chinese Journal of geotechnical engineering. Vol. 31(2009), pp.7114-719.

[6] H.T. Li,Q. Wu,C.F. Lv . Research on the lateral bearing capacity of prestressed high-strength concrete pipe pile under different vertical load. Geotechnical Investigation & Surveying, Vol. 11(2011), p: 19-23.

[7] T. Fang. Study on Deformation and Load-bearing Characteristics of Segmentally Variable Cross-section pile. Chongqing, china. College of CiVil Engineering of Chongqing UniVersity, (2012).

[8] S.N. Hou S.N. Liu Y.B. Sun, et al. Lateral Capacity of PHC Pile on Site Test and Calculation Research, Vol. 12(2012), p: 28-31.

[9] S.N. Hou S.N. Liu Z.X. Cai, et. al. Test standards for lateral capacity of single PHC pile. Chinese Journal of Geotechnical Engineering, Vol. 1(2013), p: 378-382.