預鑽孔植入PC樁於排水土層之壓載詮釋法評估

Evaluation of Interpretation Criteria for Pre-Bored PC Piles In Drained Soils

陳逸駿(Yit-Jin Chen) ； 陳俊宏(Chung-Hung Chen) ； 張有恒(Joseph Chang)

《中國土木水利工程學刊》 25卷1期 (2013/03) Pp. 1-7

https://doi.org/10.6652/JoCICHE.201303_25(1).0001

摘要

This paper is a critical evaluation of the interpretation criteria for pre-bored PC piles in drained soils under axial compression loading. A total of 18 sites with 50 load tests were collected for analysis, and representative interpretation criteria were applied to these load test data to examine their relative merits and interrelationships. From the statistical analysis, the initial linear region is within a very small displacement and is terminated at mean displacement of 0.46%B (B = drilled diameter) or 3.4 mm. The mean normalized ratios of representative interpretation criteria range from 0.78 to 1.28, and the mean displacements are distributed from 15 to ＞ 65 mm. The results indicate that significant difference exists on these criteria to interpret pile capacity. Based on these analyses, the suggested interpretation criteria for engineering practice are given, in terms of both displacement and capacity.

關鍵字

受壓載重試驗 ； 排水土層 ； 預鑽孔植入PC樁 ； 詮釋法 ； 支承力

並列摘要

This paper is a critical evaluation of the interpretation criteria for pre-bored PC piles in drained soils under axial compression loading. A total of 18 sites with 50 load tests were collected for analysis, and representative interpretation criteria were applied to these load test data to examine their relative merits and interrelationships. From the statistical analysis, the initial linear region is within a very small displacement and is terminated at mean displacement of 0.46%B (B = drilled diameter) or 3.4 mm. The mean normalized ratios of representative interpretation criteria range from 0.78 to 1.28, and the mean displacements are distributed from 15 to ＞ 65 mm. The results indicate that significant difference exists on these criteria to interpret pile capacity. Based on these analyses, the suggested interpretation criteria for engineering practice are given, in terms of both displacement and capacity.

並列關鍵字

compression load tests ； drained soils ； pre-bored PC piles ； interpretation criteria ； capacity