CAJ | 학술논문

对宁杭客运专线连续箱梁桥8孔预应力筋的管道摩阻进行试验，其中2孔直线束，采用规范公式求出孔道偏差系数为0．0021，6孔曲线束采用最小二乘法进行求解，得出孔道偏差系数为0．002，摩擦系数为0．26。实测值与设计值吻合较好，表明孔道成孔良好，符合设计要求。预应力筋实测伸长值与理论值相对误差在±6％以内，满足预应力筋张拉的“双控”要求。采用规范公式和简化公式对实测伸长值的计算表明，简化公式可以满足工程应用要求，实际施工可按两阶段进行张拉，简化施工程序，提高施工效率，具有较高的社会经济效益。
대저항객운전선련속상량교8공예응력근적관도마조진행시험，기중2공직선속，채용규범공식구출공도편차계수위0．0021，6공곡선속채용최소이승법진행구해，득출공도편차계수위0．002，마찰계수위0．26。실측치여설계치문합교호，표명공도성공량호，부합설계요구。예응력근실측신장치여이론치상대오차재±6％이내，만족예응력근장랍적“쌍공”요구。채용규범공식화간화공식대실측신장치적계산표명，간화공식가이만족공정응용요구，실제시공가안량계단진행장랍，간화시공정서，제고시공효솔，구유교고적사회경제효익。
The friction between tendons and duct in continuous box-girder bridge for Nanjing-Hangzhou passenger dedicated line was tested .Only using the code formula ,Duct deviation coefficient equals 0 .0021 from two straight-tendons'test .Least-square method was adopted to solve the friction coeffi-cient betw een tendons and duct w hich equals 0 .26 and duct deviation coefficient w hich equals 0 .002 from six curve-tendons'experiment .The test value is close to the design value ,which shows that the duct was formed favorable for the design requirements .The relative error between test and theoretical elongation value of tendons is within ± 6% ,which meets the double-control demand .The elongation value calculated by using the code formula and simplified formula show s that the simplified formula is satisfied with engineering application requirements .The actual construction can accord two-phase ten-don-tension w hich simplify the construction procedure ,improve the construction efficiency ,and take on high social and economic benefits .