Design and Construction of Anti-flow Around Water Sac for Underground Diaphragm Wall
In the process of construction of underground diaphragm wall in water-rich and weak strata,the anti-flow around measures of wall joint are the key to enhance the overall stiffness and anti-seepage performance of the underground diaphragm wall and improve the construction quality of the wall.Based on the project of Lüdao Lake Middle Station of Foshan Metro,a new type of anti-flow around water sac technology is proposed on the basis of traditional anti-flow around measures.The water sac is used to fill the interior of the I-shaped steel web,block the concrete circulation channel,and provide temporary support for the soft soil layer.Compared with the traditional anti-flow around measures,the pouring rate of underground diaphragm wall with anti-flow around water sac technology is significantly improved,and the construction quality and overall waterproof performance of I-steel joints of underground diaphragm wall are significantly improved.
subwaysunderground diaphragm wallwater-rich and weak stratajointanti-flow aroundwater sacdesign
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