Title: Post-grouting technique for piled foundation:Case history of Su-Tong Bridge
Abstract: Post-grouting technique has a wide range application to piled foundations.The principle of post-grouting technique is as follows: through grouting cement into bottom of bored pile or around pile body,the loose material such as deposit and slime during pile construction can be strengthened;and it can highly increase frictional resistance and end bearing capacity of pile.Post-grouting technique was successfully employed in the piled foundation of Su-Tong Bridge,a huge bridge under construction which connects Suzhou City and Nantong City in Jiangsu Province,China.According to the results of static load tests,the U-shape grouting pipe was used in the project for the piles’ bottom grouting.After grouted,values of the ultimate bearing capacity of the tested piles were increased up to1.48-2.0 times the ones of un-grouted bored piles.For end bearing capacities,their values were increased up to 2.46-7.21 times.It can be drawn a conclusion that through using post-grouting technique,it saves investment,improves construction quality and reliability,and brings considerable economic benefits and well social environment effects as well.
Publication Year: 2008
Publication Date: 2008-01-01
Language: en
Type: article
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Cited By Count: 3
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