永惠(hui)(hui)橋(qiao)(qiao)(qiao)位于(yu)山(shan)西省長(chang)治市襄垣(yuan)縣(xian)城北門與(yu)北廓門之間甘水河兩(liang)岸,永惠(hui)(hui)橋(qiao)(qiao)(qiao)俗稱北關橋(qiao)(qiao)(qiao)。永惠(hui)(hui)橋(qiao)(qiao)(qiao)是一(yi)座單(dan)孔青石(shi)結構的拱(gong)(gong)形(xing)橋(qiao)(qiao)(qiao),橋(qiao)(qiao)(qiao)南(nan)北長(chang)33.6米(mi),東西寬8.34米(mi)。橫(heng)跨于(yu)襄垣(yuan)縣(xian)城北門外的甘水河上。永惠(hui)(hui)橋(qiao)(qiao)(qiao)采用(yong)縱聯(lian)式砌筑法拱(gong)(gong)劵技術,拱(gong)(gong)劵石(shi)以疊(die)澀收分(fen)法壘砌,形(xing)成下大上小(xiao)的立體式梯形(xing)結構的橋(qiao)(qiao)(qiao)座,體現了我(wo)國古代拱(gong)(gong)形(xing)技術的科技水平。
永(yong)惠(hui)橋(qiao)(qiao)為(wei)單(dan)孔實腹尖拱石(shi)橋(qiao)(qiao),長29.5米(mi)(mi),寬8.5米(mi)(mi),橋(qiao)(qiao)孔凈跨(kua)(kua)12.8米(mi)(mi),矢高7.5米(mi)(mi),高跨(kua)(kua)之比(bi)約為(wei)1:0.59。整個建(jian)筑用長方形、梯形、微(wei)弧形石(shi)灰巖條石(shi)橫置(zhi)砌成,拱券兩側(ce)正中龍門(men)石(shi)上采用深、淺(qian)浮雕手法各雕"四(si)爪升龍"三(san)條。橋(qiao)(qiao)面兩側(ce)有望柱、欄(lan)(lan)桿、石(shi)欄(lan)(lan)板(ban)裝飾。欄(lan)(lan)板(ban)雕刻春(chun)秋花卉、人物故事等,背面刻花紋。
據清乾隆縣志載:永惠(hui)橋始建于金天會九年(nian)(nian)(1131年(nian)(nian))。歷經明成化(hua)年(nian)(nian)間,明萬歷十(shi)九年(nian)(nian)(1591年(nian)(nian))、清道光十(shi)九年(nian)(nian)(1838年(nian)(nian))多次維(wei)修。現存永惠(hui)橋及附屬(shu)文(wen)物(wu)五龍廟山門、正殿、樂樓。是(shi)中華人民共和國全國重點(dian)文(wen)物(wu)保護單(dan)位(wei)之(zhi)一。
1996年(nian)1月12日,授(shou)予山西省文物(wu)(wu)保護(hu)(hu)單位(wei),2013年(nian)5月授(shou)予全國重點文物(wu)(wu)保護(hu)(hu)單位(wei),是(shi)一座古建筑及(ji)歷史紀念(nian)建筑物(wu)(wu)。