臨(lin)時(shi)支(zhi)座是(shi)在結(jie)(jie)構(gou)(gou)施工(gong)(gong)(gong)(gong)過程(cheng)中(zhong)(zhong)起(qi)(qi)承重和穩(wen)定作用(yong)(yong)的(de)臨(lin)時(shi)性支(zhi)撐結(jie)(jie)構(gou)(gou)，用(yong)(yong)于保持結(jie)(jie)構(gou)(gou)穩(wen)定，等到結(jie)(jie)構(gou)(gou)完成后再拆除；而臨(lin)時(shi)固(gu)結(jie)(jie)是(shi)用(yong)(yong)于保證結(jie)(jie)構(gou)(gou)安(an)全的(de)一種(zhong)防護和支(zhi)撐體系(xi)， 預制t梁(liang)鋼制臨(lin)時(shi)支(zhi)座，用(yong)(yong)于在工(gong)(gong)(gong)(gong)程(cheng)施工(gong)(gong)(gong)(gong)、修繕及(ji)改建(jian)等加固(gu)工(gong)(gong)(gong)(gong)作中(zhong)(zhong)，因施工(gong)(gong)(gong)(gong)振動及(ji)負荷作用(yong)(yong)等原因而導致原有結(jie)(jie)構(gou)(gou)產生加固(gu)過程(cheng)中(zhong)(zhong)的(de)臨(lin)時(shi)性變形(xing)時(shi)，起(qi)(qi)到限制變形(xing)、保障(zhang)結(jie)(jie)構(gou)(gou)安(an)全的(de)作用(yong)(yong)。

可以看出兩者的目的和(he)性質不同，因此臨時支座不等同于臨時固結。

橋梁(liang)(liang)預制(zhi)箱(xiang)(xiang)梁(liang)(liang)、T梁(liang)(liang)架(jia)設中(zhong)沙桶沙箱(xiang)(xiang)臨(lin)時(shi)支座(zuo)制(zhi)作(zuo)簡單，鋼制(zhi)臨(lin)時(shi)支座(zuo)，操作(zuo)方便(bian)，上(shang)下(xia)(xia)套(tao)筒(tong)(tong)分(fen)離(li)，可拆式鋼制(zhi)臨(lin)時(shi)支座(zuo)，輕便(bian)，易于在高空(kong)作(zuo)業(ye)搬運、操作(zuo)、安裝。卸(xie)載時(shi)只要把(ba)下(xia)(xia)筒(tong)(tong)的螺(luo)絲扭(niu)開，把(ba)砂子卸(xie)出，上(shang)頂筒(tong)(tong)下(xia)(xia)沉(chen)縮(suo)下(xia)(xia)即可以(yi)拆除。鋼箱(xiang)(xiang)筒(tong)(tong)可以(yi)重復利用。

在(zai)梁(liang)板安(an)(an)裝前注(zhu)意橋(qiao)(qiao)梁(liang)圓(yuan)筒(tong)鋼(gang)管支(zhi)(zhi)(zhi)座(zuo) 砂箱臨時(shi)(shi)支(zhi)(zhi)(zhi)座(zuo)的位置和標高(gao)控制，對(dui)橋(qiao)(qiao)梁(liang)橋(qiao)(qiao)梁(liang)圓(yuan)筒(tong)鋼(gang)管支(zhi)(zhi)(zhi)座(zuo) 砂箱臨時(shi)(shi)支(zhi)(zhi)(zhi)座(zuo)墊石進行準確(que)測量放線，橋(qiao)(qiao)臺蓋梁(liang)上(shang)安(an)(an)放支(zhi)(zhi)(zhi)座(zuo)，在(zai)橋(qiao)(qiao)墩蓋梁(liang)上(shang)安(an)(an)放臨時(shi)(shi)支(zhi)(zhi)(zhi)座(zuo)。

調(diao)整(zheng)(zheng)(zheng)設(she)(she)備：臨時支座可以使用調(diao)整(zheng)(zheng)(zheng)裝置進(jin)行(xing)調(diao)整(zheng)(zheng)(zheng)，以確保整(zheng)(zheng)(zheng)個(ge)橋梁(liang)結構符合設(she)(she)計要求，同時，建筑鋼制臨時支座，臨時支座也(ye)可以作為施工(gong)車輛和(he)人員通行(xing)的支撐平(ping)臺。

分散(san)荷載(zai)：使用臨時支(zhi)座可以(yi)將整個(ge)橋(qiao)(qiao)梁結構的重量分散(san)到(dao)更(geng)多的支(zhi)點(dian)上，以(yi)減輕每個(ge)支(zhi)點(dian)所受的荷載(zai)，從而保(bao)證橋(qiao)(qiao)梁施工(gong)的安全(quan)性和穩定(ding)性。

保證施工質量：使用臨時支座可以幫助工人們進行精細化的施工，使橋梁結構地按照設計要求進行建設，從而保證施工的質量和效率。