Skin friction of piles coated with bituminous coats

被引：0

作者：

Dept. of Civil Engineering, Indian Institute of Tech. Madras, Chennai 600036, India ^{[1
]}

机构：

[1] Dept. of Civil Engineering, Indian Institute of Tech. Madras

来源：

Geotech Spec Publ | 2007年 / 158卷

关键词：

12;

D O I：

10.1061/40902(221)13

中图分类号：

学科分类号：

摘要：

Piles are often coated with a slip layer such as bitumen to reduce the dragload. The friction between granular soil and coated as well as uncoated pile surfaces were studied using a modified direct shear test apparatus. The lower half of the direct shear box was replaced with a concrete or mild steel block to represent a pile surface. Two types of bituminous coat namely Shalikote and Bitumen of grade 30-40 were evaluated in this study. Shalikote and Bitumen coating reduced the interface friction by more than 70% and 90% respectively. The shearing resistance of pile material-coat-soil is found to be influenced by normal stress, type of coat, and coat thickness. The effect of saturation and the rate of soil settlement on the interface friction are also discussed. Pull out tests were carried out on coated and uncoated model aluminum pile placed in a circular tank filled with granular soil. The results of pull out tests are compared with interface friction tests. Copyright ASCE 2007.

引用

共 12 条

[1]

Baligh M.M., Vivatrat V., Figi H., Downdrag on bitumen-coated piles, Journal of Geotechnical Engineering, ASCE, 104, 11, pp. 1355-1370, (1978)

[2]

Briaud J.L., Tucker L.M., Design and construction guidelines for downdrag on uncoated and bitumen coated piles, NCH Rep, 393, (1997)

[3]

Burland J.B., Shaft friction of piles in clay- a simple fundamental approach, Ground Engineering, 7, pp. 30-42, (1973)

[4]

Chow S.H., Wong K.S., Model Pile Pull-Out Tests Using Polyethylene Sheets to Reduce Downdrag on Cast In Situ Piles, ASTM Geotechnical Testing Journal, 27, 3, pp. 1-9, (2004)

[5]

Heerema E.P., Relationship between wall friction, displacement velocity, and horizontal stress in clay and sand, for pile drivability analysis, Ground Engineering, 12, 9, pp. 55-60, (1979)

[6]

Indraratna B., Balasubramaniam A.S., Phamvan P., Wong Y.K., Development of negative skin friction on driven piles in soft Bangkok clay, Canadian Geotechnical Journal, 29, pp. 393-404, (1992)

[7]

Keenan G.H., Bozuzuk M., Downdrag on a Three-Pile Group of Pipe Piles, Proceedings of the 11th International Conference on Soil Mechanics and Foundation Engineering, San Francisco, 2, pp. 1407-1412, (1985)

[8]

Kishida H., Stress distribution by model piles in sand, Soils and Foundations, 4, 1, pp. 1-23, (1963)

[9]

Meyerhof G.G., Compaction of sands and bearing capacity of cohesionless soils, J. Soil Mech. Found. Div., ASCE, 85, 6, pp. 1-29, (1959)

[10]

Robinsky E.I., Morrison C.F., Sand displacement and compaction around model friction piles, Can. Geotech. J, 1, 2, pp. 81-93, (1964)

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