玄(xuan)妙觀(guan)在江蘇(su)省蘇(su)州市,始(shi)建(jian)(jian)(jian)于(yu)西(xi)晉咸寧二年,唐代(dai)稱(cheng)開元宮,北宋稱(cheng)天慶(qing)觀(guan),元代(dai)改今名,曾多次(ci)(ci)毀壞,多次(ci)(ci)修葺。三(san)清殿是(shi)玄(xuan)妙觀(guan)的(de)正殿,重建(jian)(jian)(jian)于(yu)南(nan)宋淳熙六年(1179),是(shi)中國長江以南(nan)大的(de)木(mu)構古(gu)建(jian)(jian)(jian)筑(zhu)。它既(ji)是(shi)宋代(dai)官式建(jian)(jian)(jian)筑(zhu)的(de)代(dai)表(biao),也表(biao)現出地方性建(jian)(jian)(jian)筑(zhu)的(de)特(te)點(dian),是(shi)研究宋代(dai)南(nan)北建(jian)(jian)(jian)筑(zhu)差異的(de)重要例(li)證(zheng)。1982年定(ding)為全國重點(dian)文物保護(hu)單位。
三清殿(dian)為重檐(yan)歇山頂建(jian)筑(見大木作),殿(dian)身面闊七間,進深四間,四周加一(yi)圈深一(yi)間的副階(jie),構成下檐(yan)。殿(dian)前有寬(kuan)五間的月臺。
殿(dian)(dian)(dian)的(de)(de)木構部(bu)分屬殿(dian)(dian)(dian)堂型(xing)構架(jia)(jia)(jia)(jia)(jia)(jia)(jia),近似《營造法式(shi)(shi)》所載殿(dian)(dian)(dian)身(shen)七間(jian)(jian)副(fu)階周(zhou)匝身(shen)內(nei)金箱斗(dou)底槽構架(jia)(jia)(jia)(jia)(jia)(jia)(jia)。構架(jia)(jia)(jia)(jia)(jia)(jia)(jia)由(you)上(shang)(shang)、中(zhong)(zhong)、下(xia)三層重疊而成。下(xia)層為(wei)柱(zhu)(zhu)(zhu)(zhu)網(wang),沿(yan)(yan)周(zhou)邊立(li)兩圈(quan)柱(zhu)(zhu)(zhu)(zhu)子,外(wai)圈(quan)22柱(zhu)(zhu)(zhu)(zhu),內(nei)圈(quan)14柱(zhu)(zhu)(zhu)(zhu),柱(zhu)(zhu)(zhu)(zhu)頂架(jia)(jia)(jia)(jia)(jia)(jia)(jia)闌額,連成兩個相套的(de)(de)同(tong)高矩形(xing)框(kuang),形(xing)成內(nei)外(wai)槽。又(you)沿(yan)(yan)進深方向(xiang)在內(nei)槽前后四(si)(si)柱(zhu)(zhu)(zhu)(zhu)間(jian)(jian)架(jia)(jia)(jia)(jia)(jia)(jia)(jia)四(si)(si)道順串(chuan)(即(ji)清式(shi)(shi)的(de)(de)隨梁枋),使(shi)柱(zhu)(zhu)(zhu)(zhu)端(duan)縱橫向(xiang)都連在一起。在四(si)(si)道順串(chuan)的(de)(de)中(zhong)(zhong)部(bu),下(xia)面又(you)立(li)四(si)(si)柱(zhu)(zhu)(zhu)(zhu),形(xing)成現狀的(de)(de)滿(man)堂柱(zhu)(zhu)(zhu)(zhu)網(wang)。中(zhong)(zhong)層是鋪(pu)(pu)作(zuo)(zuo)(zuo)層,在闌額和順串(chuan)上(shang)(shang)加(jia)普拍枋,枋上(shang)(shang)放斗(dou),柱(zhu)(zhu)(zhu)(zhu)間(jian)(jian)用兩朵補(bu)間(jian)(jian)鋪(pu)(pu)作(zuo)(zuo)(zuo),前后內(nei)柱(zhu)(zhu)(zhu)(zhu)間(jian)(jian)順串(chuan)上(shang)(shang)用三朵補(bu)間(jian)(jian)鋪(pu)(pu)作(zuo)(zuo)(zuo)。殿(dian)(dian)(dian)內(nei)各(ge)鋪(pu)(pu)作(zuo)(zuo)(zuo)頂上(shang)(shang)架(jia)(jia)(jia)(jia)(jia)(jia)(jia)平枋,裝設平,形(xing)成殿(dian)(dian)(dian)內(nei)空間(jian)(jian)。上(shang)(shang)層為(wei)屋頂構架(jia)(jia)(jia)(jia)(jia)(jia)(jia)層。除兩山外(wai),沿(yan)(yan)各(ge)間(jian)(jian)進深在內(nei)外(wai)槽柱(zhu)(zhu)(zhu)(zhu)之上(shang)(shang)及(ji)中(zhong)(zhong)柱(zhu)(zhu)(zhu)(zhu)間(jian)(jian)順串(chuan)中(zhong)(zhong)點之上(shang)(shang)(即(ji)脊下(xia))立(li)柱(zhu)(zhu)(zhu)(zhu),壓在鋪(pu)(pu)作(zuo)(zuo)(zuo)上(shang)(shang)層柱(zhu)(zhu)(zhu)(zhu)頭枋上(shang)(shang),柱(zhu)(zhu)(zhu)(zhu)間(jian)(jian)架(jia)(jia)(jia)(jia)(jia)(jia)(jia)梁,形(xing)成深12架(jia)(jia)(jia)(jia)(jia)(jia)(jia)前后用5柱(zhu)(zhu)(zhu)(zhu)的(de)(de)6道穿(chuan)斗(dou)式(shi)(shi)草架(jia)(jia)(jia)(jia)(jia)(jia)(jia)。草架(jia)(jia)(jia)(jia)(jia)(jia)(jia)上(shang)(shang)架(jia)(jia)(jia)(jia)(jia)(jia)(jia)檁,構成屋頂。
殿四周副階(jie)在下(xia)檐柱(zhu)上(shang)用四鋪作斗,上(shang)承副階(jie)梁架(jia),副階(jie)梁尾均插入殿身(shen)檐柱(zhu)。
三(san)清(qing)殿(dian)木(mu)構(gou)(gou)部分(fen)有(you)幾點(dian)(dian)(dian)值(zhi)得注意:①內(nei)(nei)槽(cao)(cao)(cao)柱(zhu)(zhu)頭和(he)補間(jian)(jian)(jian)鋪作(zuo)(zuo)向內(nei)(nei)一側(ce)在(zai)(zai)第(di)二跳華(hua)以上(shang)(shang)(shang)(shang)用(yong)(yong)了(le)(le)向上(shang)(shang)(shang)(shang)斜舉的(de)上(shang)(shang)(shang)(shang)昂(ang),前后內(nei)(nei)槽(cao)(cao)(cao)柱(zhu)(zhu)間(jian)(jian)(jian)順串(chuan)(chuan)上(shang)(shang)(shang)(shang)三(san)朵補間(jian)(jian)(jian)鋪作(zuo)(zuo)均兩面出上(shang)(shang)(shang)(shang)昂(ang),是(shi)現存(cun)早用(yong)(yong)于(yu)大(da)(da)木(mu)作(zuo)(zuo)中的(de)上(shang)(shang)(shang)(shang)昂(ang)實例。②《營造(zao)法式(shi)》殿(dian)堂型構(gou)(gou)架的(de)鋪作(zuo)(zuo)層柱(zhu)(zhu)頭斗(dou)(dou)(dou)承托明,明同(tong)下面的(de)順串(chuan)(chuan)間(jian)(jian)(jian)無補間(jian)(jian)(jian)鋪作(zuo)(zuo)。此(ci)殿(dian)內(nei)(nei)槽(cao)(cao)(cao)前后柱(zhu)(zhu)間(jian)(jian)(jian)以順串(chuan)(chuan)為(wei)梁,上(shang)(shang)(shang)(shang)置三(san)朵補間(jian)(jian)(jian)鋪作(zuo)(zuo),上(shang)(shang)(shang)(shang)面不加明,直接用(yong)(yong)斗(dou)(dou)(dou)的(de)柱(zhu)(zhu)頭枋(fang)承上(shang)(shang)(shang)(shang)層屋頂(ding)構(gou)(gou)架,與《營造(zao)法式(shi)》做法不同(tong),似為(wei)明官式(shi)做法之濫(lan)觴。③《營造(zao)法式(shi)》殿(dian)堂型構(gou)(gou)架內(nei)(nei)槽(cao)(cao)(cao)只(zhi)沿周邊一圈有(you)斗(dou)(dou)(dou),整(zheng)個(ge)內(nei)(nei)槽(cao)(cao)(cao)是(shi)一個(ge)橫長(chang)的(de)、頂(ding)上(shang)(shang)(shang)(shang)呈(cheng)頂(ding)形的(de)敞廳。此(ci)殿(dian)在(zai)(zai)內(nei)(nei)槽(cao)(cao)(cao)柱(zhu)(zhu)間(jian)(jian)(jian)順串(chuan)(chuan)上(shang)(shang)(shang)(shang)也加斗(dou)(dou)(dou),把平(ping)截(jie)成五段,形成五個(ge)并列的(de)縱長(chang)形頂(ding)小廳。外槽(cao)(cao)(cao)平(ping)劃分(fen)也和(he)“金箱斗(dou)(dou)(dou)底槽(cao)(cao)(cao)”小異(yi)。④唐、宋殿(dian)堂型構(gou)(gou)架柱(zhu)(zhu)子止于(yu)鋪作(zuo)(zuo)之下。此(ci)殿(dian)雖絕大(da)(da)部分(fen)如此(ci),但內(nei)(nei)槽(cao)(cao)(cao)后側(ce)中間(jian)(jian)(jian)四柱(zhu)(zhu)穿過平(ping)上(shang)(shang)(shang)(shang)伸,后檐中間(jian)(jian)(jian)六柱(zhu)(zhu)也直抵(di)檐檁下。內(nei)(nei)槽(cao)(cao)(cao)明、次間(jian)(jian)(jian)四道順串(chuan)(chuan)上(shang)(shang)(shang)(shang),在(zai)(zai)中間(jian)(jian)(jian)一朵補間(jian)(jian)(jian)鋪作(zuo)(zuo)處各立(li)一根蜀柱(zhu)(zhu)。在(zai)(zai)這14根柱(zhu)(zhu)上(shang)(shang)(shang)(shang),斗(dou)(dou)(dou)都插在(zai)(zai)柱(zhu)(zhu)身(shen)上(shang)(shang)(shang)(shang),顯示出南方流行的(de)穿斗(dou)(dou)(dou)式(shi)構(gou)(gou)架特點(dian)(dian)(dian)。上(shang)(shang)(shang)(shang)述四點(dian)(dian)(dian)中,后三(san)點(dian)(dian)(dian)都反映了(le)(le)官式(shi)做法和(he)地方做法的(de)差異(yi),兩者出現在(zai)(zai)同(tong)一座建(jian)筑(zhu)中,反映了(le)(le)它們的(de)交流融合過程。
此殿現狀(zhuang)為沿副階(jie)柱開門窗砌(qi)墻(qiang)。其門窗、墻(qiang)壁、翼角、瓦(wa)件等屢經重(zhong)修,已(yi)不能反(fan)映(ying)宋代風(feng)貌。殿內(nei)(nei)柱、天花(hua)、草(cao)架也多經抽(chou)換(huan)更易。另在內(nei)(nei)槽(cao)明、次間四(si)道順串中點下有四(si)根柱,矮于(yu)其他(ta)內(nei)(nei)柱,它是原有的(de)還是后加的(de),還有不同看法。殿內(nei)(nei)槽(cao)有磚砌(qi)須(xu)彌座,上塑三清像,雖經改裝,基本上仍是宋代遺(yi)物(wu)。