預(yù)應(yīng)力千斤頂是用于張拉鋼鉸線等預(yù)應(yīng)力筋的千斤頂。預(yù)應(yīng)力千斤頂均為穿心式液壓雙作用千斤頂，預(yù)應(yīng)力千斤頂需和高壓油泵配合使用，張拉和回頂?shù)膭?dòng)力均由高壓油泵的高壓油提供。根據(jù)結(jié)構(gòu)的不同又分為前卡千斤頂和普通穿心式千斤頂。 預(yù) 
    　使用前應(yīng)嚴(yán)格檢查千斤頂?shù)膮?shù)，切忌壓載使用。張拉前檢查油泵油量，并使千斤頂空行程運(yùn)行幾次以排空千斤頂及內(nèi)的空氣。 　　前卡千斤頂主要用于初張拉和單根錨具張拉，普通穿心式千斤頂主要用于群錨整體張拉。安裝錨具及千斤頂時(shí)，對(duì)直線預(yù)應(yīng)力筋，應(yīng)使張拉力的作用線與孔道中心線在張拉過(guò)程中相互重合；對(duì)曲線預(yù)應(yīng)力筋，應(yīng)使張拉力的作用線與孔道末端中心點(diǎn)的切線相互重合。張拉時(shí)預(yù)應(yīng)力筋從工作錨、限位板、千斤頂中間穿過(guò)。預(yù)應(yīng)力筋的張拉順序應(yīng)合設(shè)計(jì)要求。                                

YDC穿心式千斤頂參數(shù)                
型號(hào)規(guī)格   公稱張拉力 (KN)   公稱(Mpa)    穿心孔徑 (mm)    裝限位板孔徑 (mm)      裝工具錨孔徑 (mm)      外徑 尺寸(mm)    直徑*高度
YDC650               650             48                              72                              99                                       95                                     200*385 
YDC1000              1000             50                              78                              111                                       111                                     230*385 
YDC1500              1500             52                              94                              150                                       150                                     270*390 
YDC2000              2000             53                              118                              177                                       177                                     320*400 
YDC2500              2500             52                              128                           210                                       185                                     345*400 
YDC3000              3000             52                              135                              190                                       185                                     370*400 
YDC3500              3500             51                              160                              232                                       232                                     420*400 
YD000             4000            52                              165                              252                                       252                                     450*410 
YDC5000             5000            52                              196                              260                                       265                                     500*410 
YDC6500             6500            53                              220                           295                                       235                                     580*420 
YDC10000       10000            50                              270                              440                                       415                                     740*570