自應力(li)鋼筋混(hun)凝(ning)土壓力(li)管(guan)(guan)(guan)（RCCP管(guan)(guan)(guan)）有平口(kou)式管(guan)(guan)(guan)和承插(cha)式管(guan)(guan)(guan)兩種(zhong)(zhong)，已成功(gong)地用(yong)于輸(shu)送水、煤氣和熱(re)電廠粉煤灰(hui)等。它與鑄鐵(tie)管(guan)(guan)(guan)相(xiang)比有下列優點(dian)：剛性好(hao)，據介紹，這種(zhong)(zhong)管(guan)(guan)(guan)道在地下可(ke)(ke)使(shi)用(yong)80年以上(shang)；不導電，能(neng)避免雜散電流(liu)對(dui)管(guan)(guan)(guan)線的腐蝕；熱(re)導率低，外界溫度變化對(dui)管(guan)(guan)(guan)內(nei)(nei)(nei)影響(xiang)小(xiao)；長期輸(shu)水內(nei)(nei)(nei)表面不長銹瘤，通(tong)水能(neng)力(li)不變；有裂縫閉合和愈合能(neng)力(li)，若出現寬度小(xiao)于0.25mm裂紋，在自壓應力(li)作用(yong)下能(neng)閉合，通(tong)常仍可(ke)(ke)作壓力(li)為(wei)0.6MPa以內(nei)(nei)(nei)的輸(shu)水管(guan)(guan)(guan)使(shi)用(yong)；鋪(pu)設簡便(bian)；接頭(tou)密封性好(hao)，使(shi)用(yong)可(ke)(ke)靠(kao)；價格便(bian)宜。缺點(dian)是(shi)：自重大；性脆、易斷；當輸(shu)送含有面體(ti)顆粒的介質時，耐磨性不及鑄鐵(tie)管(guan)(guan)(guan)。RCCP管(guan)(guan)(guan)的參考標準有AWWA C302、AWWA C303等。