Groundwater Engineering by Yiqun Tang Jie Zhou Ping Yang Jingjing Yan & Nianqing Zhou

Author:Yiqun Tang, Jie Zhou, Ping Yang, Jingjing Yan & Nianqing Zhou
Language: eng
Format: epub
Publisher: Springer Berlin Heidelberg, Berlin, Heidelberg

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If the result of checking calculation cannot meet the dewatering requirements, adjust the burial depth of wellpoint pipe until the requirements are all satisfied.

5.1.6 Choice of Filter Screen and Sand Pack

5.1.6.1 The Importance of Filter Screen and Sand Pack

The choice of filter screen directly influencing the dewatering effect. In fine sand layer, if there is no sand pack, the water head will decrease heavily after flowing into the filter pipe. If the sand filled in could not be up to the standard or the holes in filter screen are too big, the fines in soils will flow away during drainage, which will lead to the decrease in foundation bear capacity, and the blocking of filter pipe, connection pipe, or header pipe.

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