錨索張拉計(jì)算書

1、軌道交通環(huán)線冉家壩站風(fēng)亭組錨索擋墻 預(yù)應(yīng)力錨索張拉計(jì)算書一、預(yù)應(yīng)力錨索的主要設(shè)計(jì)參數(shù)和要求1 .預(yù)應(yīng)力錨索采用9s15.2高強(qiáng)度低松弛鋼絞線，強(qiáng)度級(jí)別為1860Mpa公稱直徑15.24mm公稱面積140m木 彈性模量為195000N/m鬲2 .預(yù)應(yīng)力鋼絞線的設(shè)計(jì)施加應(yīng)力為 550KN3 .預(yù)應(yīng)力鋼絞線的錨固段長(zhǎng)度不小于 8m自由段為長(zhǎng)度數(shù)據(jù)如附圖1-1 ,千斤頂工作長(zhǎng)度為100cm附圖1-1：錨索自由段長(zhǎng)度統(tǒng)計(jì)表序號(hào)錨索孔位編號(hào)自由段長(zhǎng)度（mmi序號(hào)錨索孔位編號(hào)自由段長(zhǎng)度（mm1A2-11570015C2-1150002A2-21230016C3-1160003A3-11540017C3-21

2、55004A3-21240018C4-1190005A4-11730019C5-1200006A4-21500020C5-2180007A5-11820021C6-1200008A5-21900022C6-2190009A6-12120023C7-12130010A6-22050024C7-21950011A7-12150025C8-12120012A7-21950026C8-21950013C0-11050027C9-12100014C1-1115004 .張拉設(shè)備校準(zhǔn)方程P=0.022980F+0.409927P 一壓力指木器不值（MPa）F 一標(biāo)準(zhǔn)力值（KN二、預(yù)應(yīng)力鋼絞線的張拉程序張拉

3、預(yù)應(yīng)力鋼絞線的主要機(jī)具有油泵、千斤頂和油表，千斤頂和油表 必須經(jīng)過(guò)配套標(biāo)定之后才允許使用，標(biāo)定單位必須通過(guò)國(guó)家有關(guān)單位認(rèn)可。一般標(biāo)定的有效期限為6個(gè)月或使用300次或發(fā)現(xiàn)有不正常情況也須 重新標(biāo)定。張拉采用液壓千斤頂250t級(jí)進(jìn)行張拉，張拉前先對(duì)鋼絞線預(yù)調(diào)。單 根預(yù)調(diào)的目的是使一孔內(nèi)的鋼絞線達(dá)到順直、受力均勻并具有一定的拉應(yīng) 力狀態(tài)，消除鋼絞線的非彈性變形，以便更好地控制張拉。張拉過(guò)程中穩(wěn) 壓持荷時(shí)間：分級(jí)穩(wěn)壓3 min ,最后一級(jí)穩(wěn)壓不少于5min鎖定。簡(jiǎn)明工藝：錨具安裝-一次張拉一 N次張拉一鎖定。張拉順序：025%6 con-50%6 con-75%6 con7110%5 con三、鋼絞

4、線張理論拉伸長(zhǎng)值及壓力表讀數(shù)計(jì)算1 .計(jì)算公式 L=PL/AE式中：P 一 預(yù)應(yīng)力鋼絞線的平均張拉力（N）,L 一預(yù)應(yīng)力鋼絞線的長(zhǎng)度（mrmA 預(yù)應(yīng)力鋼絞線的公稱面積，取 140mmE 一 預(yù)應(yīng)力鋼絞線的彈性模量，取 195000N/mrm2 .理論伸長(zhǎng)值及油表讀數(shù)值計(jì)算（1）當(dāng)施加壓力=25% 6 con=0.25*550KN=137.5KN時(shí)，伸長(zhǎng)值及油表讀數(shù)如下表:1 丁 P孔位編號(hào)自由段長(zhǎng)度mm伸長(zhǎng)值mm范圍備注1A2-1157009.358.799.912A2-2123007.447.007.893A3-1154009.188.639.734A3-2124007.507.057.95

5、5A4-11730010.249.6310.866A4-2150008.958.429.497A5-11820010.7410.1011.398A5-21900011.1910.5211.869A6-12120012.4211.6813.1710A6-22050012.0311.3112.7511A7-12150012.5911.8413.3512A7-21950011.4710.7812.1613C0-1105006.446.056.8214C1-1115007.006.587.4215C2-1150008.958.429.4916C3-1160009.518.9410.0817C3-215

6、5009.238.689.7918C4-11900011.1910.5211.8619C5-12000011.7511.0512.4620C5-21800010.639.9911.2721C6-12000011.7511.0512.4622C6-21900011.1910.5211.8623C7-12130012.4811.7313.2324C7-21950011.4710.7812.1625C8-12120012.4211.6813.1726C8-21950011.4710.7812.1627C9-12100012.3111.5713.05油表回歸方程：P=0.022980F+0.40992

7、7F=25%5 con= 137.5KNP=3.57 Mpa(2)當(dāng)施加壓力=50% 6 con=0.5*550KN=275KN時(shí)，伸長(zhǎng)值及油表讀數(shù)如下表:J 丁 p孔位編號(hào)自由段長(zhǎng)度mm伸長(zhǎng)值mm范圍備注1A2-11570018.6917.5719.812A2-21230014.8913.9915.783A3-11540018.3617.2519.464A3-21240015.0014.1015.905A4-11730020.4819.2521.716A4-21500017.9116.8318.987A5-11820021.4920.2022.788A5-21900022.3921.0423

8、.739A6-12120024.8523.3626.3410A6-22050024.0622.6225.5111A7-12150025.1823.6726.6912A7-21950022.9421.5724.3213C0-11050012.8712.1013.6414C1-11150013.9913.1514.8315C2-11500017.9116.8318.9816C3-11600019.0317.8920.1717C3-21550018.4717.3619.5818C4-11900022.3921.0423.7319C5-12000023.5022.0924.9120C5-2180002

9、1.2719.9922.5421C6-12000023.5022.0924.9122C6-21900022.3921.0423.7323C7-12130024.9623.4626.4624C7-21950022.9421.5724.3225C8-12120024.8523.3626.3426C8-21950022.9421.5724.3227C9-12100024.6223.1526.10油表回歸方程：P=0.022980F+0.409927F=50%5 con= 275 KNP=6.73 Mpa(3)當(dāng)施加壓力=75% 6 con=0.75*550KN=412.5KN時(shí)，伸長(zhǎng)值及油表讀數(shù)如下

10、表:1 丁 P孔位編號(hào)自由段長(zhǎng)度mm伸長(zhǎng)值mm范圍備注1A2-11570028.0426.3629.722A2-21230022.3320.9923.673A3-11540027.5325.8829.194A3-21240022.5021.1523.855A4-11730030.7228.8832.576A4-21500026.8625.2528.477A5-11820032.2330.3034.178A5-21900033.5831.5635.599A6-12120037.2735.0339.5110A6-22050036.1033.9338.2611A7-12150037.7735.514

11、0.0412A7-21950034.4232.3536.4813C0-11050019.3118.1520.4714C1-11150020.9919.7322.2515C2-11500026.8625.2528.4716C3-11600028.5426.8330.2517C3-21550027.7026.0429.3618C4-11900033.5831.5635.5919C5-12000035.2633.1437.3720C5-21800031.9029.9833.8121C6-12000035.2633.1437.3722C6-21900033.5831.5635.5923C7-12130

12、037.4435.1939.6924C7-21950034.4232.3536.4825C8-12120037.2735.0339.5126C8-21950034.4232.3536.4827C9-1|2100036.9434.7239.15油表回歸方程：P=0.022980F+0.409927F=75%5 con= 412.5 KNP=9.89 Mpa(3)當(dāng)施加壓力=110% 6 con=1.1*550KN=605KN寸，伸長(zhǎng)值及油表讀數(shù)如下表:1 丁 P孔位編號(hào)自由段長(zhǎng)度mm伸長(zhǎng)值mm范圍備注1A2-11570041.1238.6543.592A2-21230032.7530.7834.

13、713A3-11540040.3837.9642.814A3-21240033.0031.0234.985A4-11730045.0642.3647.766A4-21500039.4037.0341.767A5-11820047.2844.4450.118A5-21900049.2546.2952.209A6-12120054.6651.3857.9410A6-22050052.9449.7656.1211A7-12150055.4052.0858.7312A7-21950050.4847.4553.5113C0-11050028.3226.6230.0214C1-11150030.7828.

14、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油表回歸