彩鋼壓型屋面排水組織問題

內(nei)天(tian)(tian)(tian)溝(gou)(gou)設計缺(que)陷：許(xu)多(duo)工程實(shi)例(li)表(biao)明，內(nei)天(tian)(tian)(tian)溝(gou)(gou)兩(liang)側(ce)漏(lou)水(shui)(shui)是(shi)發(fa)生(sheng)普遍的問題，因而在排水(shui)(shui)組織設計時應優(you)先(xian)選(xuan)擇自由排水(shui)(shui)或(huo)是(shi)外(wai)天(tian)(tian)(tian)溝(gou)(gou)排水(shui)(shui)，盡量避免采(cai)用(yong)內(nei)天(tian)(tian)(tian)溝(gou)(gou)。內(nei)天(tian)(tian)(tian)溝(gou)(gou)兩(liang)側(ce)漏(lou)水(shui)(shui)的主(zhu)要原因有天(tian)(tian)(tian)溝(gou)(gou)截面過小、厚度過薄、缺(que)少溢流設計。
天(tian)溝的大小(xiao)應通過計算屋面排水(shui)(shui)量確定；天(tian)溝應選用厚度不(bu)小(xiao)于3mm的鋼板，厚度過小(xiao)時焊接時容易焊透形(xing)成孔洞缺陷造成漏水(shui)(shui)；內天(tian)溝在有條件(jian)時應設計溢(yi)流(liu)(liu)構造，即天(tian)溝溢(yi)滿之前(qian)通過低于天(tian)溝上沿的溢(yi)流(liu)(liu)管(槽)泄水(shui)(shui)，減小(xiao)天(tian)溝蓄水(shui)(shui)壓力(li)。
落水(shui)口(kou)太少：落水(shui)口(kou)太少時，天溝(gou)(gou)的蓄水(shui)壓力較大(da)，會造成天溝(gou)(gou)水(shui)通過與屋面(mian)板(ban)縫隙流入室內甚至漫上屋面(mian)，造成事(shi)故；落水(shui)口(kou)的數量和大(da)小應依據屋面(mian)排水(shui)量和天溝(gou)(gou)蓄水(shui)能力綜合(he)計算確定(ding)。