Experimental Study of Defects in Cast-In-Situ Bored Piles and its Application for Superdeep Defect Treatment

Abstract:

Abstract. After the finishing of piles, it was found that concrete defects at 63.0m-67.0m at the No.1 Bored pile in the North Channel Bridge of Hangzhou Bay Bridge B13 pier, which is at a diameter of 250cm with length of 96m. Aiming to successful treatment for this kind of defects, the present study proposed the pressurized concrete injection treatment techniques for superdeep defects in bored piles. In the paper, the experiment was carried out in comparing various mixed proportions of grouting, and the relationship analyzed between compressive strength and sound velocity for the treatment process. From these data an empirical equation between sound velocity and strength was determined, and the curve established. Following the superdeep pressurized injection of concrete treatment technique, the bored pile was successfully treated for the defects, ensuring the pile foundation achieving design criteria.

• Periodical: Applied Mechanics and Materials (Volumes 166-169)
• Pages: 434-440
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.166-169.434
• Online since: May 2012
• Authors: Zhong Wen Wang
• Keywords: Cast-In Situ Bored Pile (CISBP), Defects Treatment, Experimental Study, Proportion of Mixtures, Superdeep Defects

References

[1] Liu Xiang. Common pile foundation accidents treatment and control in mining construction management [J]. Coal technology, 2011, 30(9): 130–132.

[2] Wang Zhongwen. The stability influence factors study of the cast in-situ bored pile's hole wall[J]. Road traffic technology, 2011, 28(1): 86–90.

[3] Xie Shilian, Liang Zhiguo, Zhang Xian. Deep defects of superlong cast in-situ bored pile analysis and treatment [J]. Construction technology, 2010, 39(1): 83–85.

[4] Li Haicheng, Liu Jia, Zhou Xinjiang. The discussion of the treatment methodology on the bridge bored piles quality defects [J]. Road traffic technology, 2008, 37(1): 119–120.

[5] Li Weijie, Li Qingyou. Rotary jet cutting method to improve pile foundation bearing capacity. Engineering technology, 2009, 2: 16–20.

[6] Zhang Hon, Chen Xinchun, Chen Rufa. Application research on the ultrasonic monitoring of superlong pile's broken pile treatment [J]. Journal of geotechnical engineering, 2008, 30(3): 420–424.

[7] Song Renxin, Wang Wuping, Fu Xiang, etc. The analysis of sound wave penetration method on bored pile defects-shadow overlapping method [J]. Zhongnan road engineering, 2006, 31(2): 77–92.

[8] Chen Qiunan, Zhang Yongxing. Composite examination and consolidation method for defect of pile foundation of bridge [J]. Journal of rock mechanics and engineering, 2004, 23(20): 3518–3522.

[9] Xu Sifa. A construction example of accidental pile treatment by consolidation grouting [J]. Journal of Zhongqing Architecture University, 2001, 23(5): 81–84.

[10] Zhang Hon. In-situ bored pile examination and treatment [M]. Beijing: People's communication publishing house, 2001.

[11] Pile foundation engineering handbook compilation committee. Pile foundation engineering handbook [M]. Beijing: Press of Chinese Architecture Industry, 1995.