锚索张拉计算书

1、标准文档轨道交通环线冉家坝站风亭组锚索挡墙 预应力锚索张拉计算书一、预应力锚索的主要设计参数和要求.预应力锚索采用9,15.2高强度低松弛钢绞线，强度级别为1860Mpa公称直径15.24mm公称面积140m木 弹性模量为195000N/m鬲.预应力钢绞线的设计施加应力为 550KN.预应力钢绞线的锚固段长度不小于 8m自由段为长度数据如附图1-1 ,千斤顶工作长度为100cm附图1-1：锚索自由段长度统计表序号锚索孔位编号自由段长度（mm序号锚索孔位编号自由段长度（mm1A2-11570015C2-1150002A2-21230016C3-1160003A3-11540017C3-21550

2、04A3-21240018C4-1190005A4-11730019C5-1200006A4-21500020C5-2180007A5-11820021C6-1200008A5-21900022C6-2190009A6-12120023C7-12130010A6-22050024C7-21950011A7-12150025C8-12120012A7-21950026C8-21950013C0-11050027C9-12100014C1-111500.张拉设备校准方程P=0.022980F+0.409927P 一压力指木器不值（MPa）F 一标准力值（KN二、预应力钢绞线的张拉程序张拉预应力钢绞

3、线的主要机具有油泵、千斤顶和油表，千斤顶和油表 必须经过配套标定之后才允许使用，标定单位必须通过国家有关单位认实用文案标准文档可。一般标定的有效期限为6个月或使用300次或发现有不正常情况也须 重新标定。张拉采用液压千斤顶250t级进行张拉，张拉前先对钢绞线预调。单 根预调的目的是使一孔内的钢绞线达到顺直、受力均匀并具有一定的拉应 力状态，消除钢绞线的非弹性变形，以便更好地控制张拉。张拉过程中稳 压持荷时间：分级稳压3 min ,最后一级稳压不少于5min锁定。简明工艺：锚具安装-一次张拉一 N次张拉一锁定。张拉顺序：025%6 con-50%6 con-75%6 con7110%5 con三

4、、钢绞线张理论拉伸长值及压力表读数计算.计算公式 L=PL/AE式中：P 一 预应力钢绞线的平均张拉力（N）,L一预应力钢绞线的长度（mmA一 预应力钢绞线的公称面积，取 140mmE 一 预应力钢绞线的弹性模量，取 195000N/mm.理论伸长值及油表读数值计算（1）当施加压力=25% 6 con=0.25*550KN=137.5KN时，伸长值及油表读数如下表:1 丁 P孔位编号自由段长度mm伸长值mm范围备注1A2-1157009.358.799.912A2-2123007.447.007.893A3-1154009.188.639.734A3-2124007.507.057.955A4

5、-11730010.249.6310.866A4-2150008.958.429.49实用文案标准文档7A5-11820010.7410.1011.398A5-21900011.1910.5211.869A6-12120012.4211.6813.1710A6-22050012.0311.3112.7511A7-12150012.5911.8413.3512A7-21950011.4710.7812.1613C0-1105006.446.056.8214C1-1115007.006.587.4215C2-1150008.958.429.4916C3-1160009.518.9410.0817C

6、3-2155009.238.689.7918C4-11900011.1910.5211.8619C5-12000011.7511.0512.4620C5-21800010.639.9911.2721C6-12000011.7511.0512.4622C6-21900011.1910.5211.8623C7-12130012.4811.7313.2324C7-21950011.4710.7812.1625C8-12120012.4211.6813.1726C8-21950011.4710.7812.1627C9-12100012.3111.5713.05油表回归方程：P=0.022980F+0.

7、409927F=25%5 con= 137.5KNP=3.57 Mpa(2)当施加压力=50% 6 con=0.5*550KN=275KN时，伸长值及油表读数如下表:J 丁 p孔位编号自由段长度mm伸长值mm范围备注1A2-11570018.6917.5719.812A2-21230014.8913.9915.783A3-11540018.3617.2519.464A3-21240015.0014.1015.905A4-11730020.4819.2521.716A4-21500017.9116.8318.987A5-11820021.4920.2022.788A5-21900022.3921

8、.0423.739A6-12120024.8523.3626.3410A6-22050024.0622.6225.5111A7-12150025.1823.6726.6912A7-21950022.9421.5724.3213C0-11050012.8712.1013.6414C1-11150013.9913.1514.8315C2-11500017.9116.8318.9816C3-11600019.0317.8920.17实用文案标准文档17C3-21550018.4717.3619.5818C4-11900022.3921.0423.7319C5-12000023.5022.0924.9

9、120C5-21800021.2719.9922.5421C6-12000023.5022.0924.9122C6-21900022.3921.0423.7323C7-12130024.9623.4626.4624C7-21950022.9421.5724.3225C8-12120024.8523.3626.3426C8-21950022.9421.5724.3227C9-12100024.6223.1526.10油表回归方程：P=0.022980F+0.409927F=50%5 con= 275 KNP=6.73 Mpa(3)当施加压力=75% 6 con=0.75*550KN=412.5K

10、N时，伸长值及油表读数如下表:1 丁 P孔位编号自由段长度mm伸长值mm范围备注1A2-11570028.0426.3629.722A2-21230022.3320.9923.673A3-11540027.5325.8829.194A3-21240022.5021.1523.855A4-11730030.7228.8832.576A4-21500026.8625.2528.477A5-11820032.2330.3034.178A5-21900033.5831.5635.599A6-12120037.2735.0339.5110A6-22050036.1033.9338.2611A7-1215

11、0037.7735.5140.0412A7-21950034.4232.3536.4813C0-11050019.3118.1520.4714C1-11150020.9919.7322.2515C2-11500026.8625.2528.4716C3-11600028.5426.8330.2517C3-21550027.7026.0429.3618C4-11900033.5831.5635.5919C5-12000035.2633.1437.3720C5-21800031.9029.9833.8121C6-12000035.2633.1437.3722C6-21900033.5831.5635

12、.5923C7-12130037.4435.1939.6924C7-21950034.4232.3536.4825C8-12120037.2735.0339.5126C8-21950034.4232.3536.48实用文案标准文档27C9-1|2100036.9434.7239.15油表回归方程：P=0.022980F+0.409927F=75%5 con= 412.5 KNP=9.89 Mpa(3)当施加压力=110% 6 con=1.1*550KN=605KN寸，伸长值及油表读数如下表:1 丁 P孔位编号自由段长度mm伸长值mm范围备注1A2-11570041.1238.6543.592A

13、2-21230032.7530.7834.713A3-11540040.3837.9642.814A3-21240033.0031.0234.985A4-11730045.0642.3647.766A4-21500039.4037.0341.767A5-11820047.2844.4450.118A5-21900049.2546.2952.209A6-12120054.6651.3857.9410A6-22050052.9449.7656.1211A7-12150055.4052.0858.7312A7-21950050.4847.4553.5113C0-11050028.3226.6230.

14、0214C1-11150030.7828.9332.6315C2-11500039.4037.0341.7616C3-11600041.8639.3544.3717C3-21550040.6338.1943.0718C4-11900049.2546.2952.2019C5-12000051.7148.6154.8120C5-21800046.7843.9849.5921C6-12000051.7148.6154.8122C6-21900049.2546.2952.2023C7-12130054.9151.6258.2124C7-21950050.4847.4553.5125C8-12120054.6651.3857.9426C8-21950050.4847.4553.5127C9-12100054.1750.9257.42F=110%d油表回归方程：P=0.022980