| 摘要 |
A sump with a double wall is provided to prevent water from infiltrating into a clearance between the double wall by burying a laterally bent portion and an upward extended portion with an exterior sump member under a concrete layer. A sump with a double wall comprises an exterior sump member(10) including a lateral wall, an interior sump member(100), and a bottom. The interior sump member, which is located in the exterior sump member, has lateral walls making an inner space for storing underground water. The bottom serves as a bottom of the exterior sump member or the interior sump member, and sustains the inner space from below. The lateral walls of the exterior and interior sump members form a double wall. The interior sump member is made of stainless steel. The upper ends of the interior sump member extends upward to make an upward extended portion(120) or is bent out of the exterior sump member to make a laterally bent portion(110). |
