| 摘要 |
A drainage wall system and method of erecting same which may be constructed substantially along property lines without encroachment exteriorly of the property lines and without requiring thick beams of struts within the property lines as are requisite with steel sheet piling or other impermeable cofferdams. A permeable cofferdam is associated with a series of vertical column members and is provided with means for guiding water which seeps therethrough to a drainage system which removes the water and thereby the water pressure from the cofferdam. A reinforced concrete wall is alter added without impairing the effectiveness of the drainage system.
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