預(yù)應(yīng)力錨索計(jì)算書

XXX工程預(yù)應(yīng)力錨索張拉計(jì)算書計(jì)算人：

審核人：

審批人：XXXXXX項(xiàng)目經(jīng)理部概述壓力分散型錨索的施工工序主要包括：施工準(zhǔn)備—錨孔鉆造T錨筋制安T錨孔注漿T框架梁施工T錨索張拉鎖定T錨孔封錨。其中最重要的一個(gè)環(huán)節(jié)就是錨索張拉鎖定。錨索的張拉鎖定工序可分為差異荷載增量和理論伸長(zhǎng)量的計(jì)算及現(xiàn)場(chǎng)超張拉、鎖定工作。一、計(jì)算公式簡(jiǎn)介因壓力分散型錨索各單元長(zhǎng)度長(zhǎng)短不一，故必須先計(jì)算各單元差異伸長(zhǎng)量和差異荷載增量，其計(jì)算公式如下：差異伸長(zhǎng)量：AL二AL—AL, AL二AL—AL1-2122-323AL=(o/E)*L,AL=(o/E*)L,AL=(o/E)*L,112233o=P/A差異荷載增量：AP=(E*A*AL/L)*211—21AP=[(E*A*AL/L)+(E*A*AL/L)]*222—322—31其中：L,LL 分別為第一、二、三單元錨索的長(zhǎng)度，12,3且L〉L〉L；123AL,AL,AL 各單兀錨索在給定最終張拉(設(shè)計(jì)123鎖定)荷載作用下的伸長(zhǎng)量；AL，AL———各單元錨索在給定最終張拉(設(shè)計(jì)鎖定)1—22—3荷載作用下的差異伸長(zhǎng)量；。-―給定最終張拉(設(shè)計(jì)鎖定)荷載作用下鋼絞線束應(yīng)力；P---給定最終張拉(設(shè)計(jì)鎖定)荷載作用下單根鋼絞線束荷載；A---單根鋼絞線束的截面面積；E---鋼絞線的彈性模量；AP,AP 分布差異張拉之第一、第二步級(jí)張拉荷載12增量。錨索張拉時(shí)的實(shí)際伸長(zhǎng)值A(chǔ)L(mm)為：AL=AL+AL12AL---錨索實(shí)際伸長(zhǎng)值(mm)AL―-從初應(yīng)力至最大張拉力間的實(shí)測(cè)伸長(zhǎng)值(mm)；1AL---初應(yīng)力以下的推算伸長(zhǎng)值(mm),可采用相鄰級(jí)的2伸長(zhǎng)值。二、 26米預(yù)應(yīng)力錨索張拉（4孔6索）計(jì)算：1、已知條件：錨索長(zhǎng):26m,錨固長(zhǎng):10m設(shè)計(jì)拉力500KN,A=140mm2,E=195(取均值)，P=83.33KN,L1=22.67m,L2=19.33m，L3=16.00m。2、計(jì)算公式：o=P/AAL12=AJ-AL2、計(jì)算公式：1-212AL2-3=AL2-AL322)34567)AL1=o/EXL1 AL2=o/EXL2al3=o/exl3△P產(chǎn)[(EAXAL1-2)/L1]X2△P2=[(EAXAL2_3)/L2+(EAAL2_3)/L1]X2(1)o=P/A=83.33/140=0.5952AL1=o/EXL1=0.5952/195X22.67=0.0692AL2=o/EXL2=0.5952/195X19.33=0.0590AL3=o/EXL3=0.5952/195X16.00=0.0488AL1-2=AL1-AL2=0.0692-0.0590=0.0102m1-2 1 2AL2-3=AL2-AL3=0.0590-0.0488=0.0102m2-3 2 3△P1=[(EAX△L1-2)/L1]X2=140X195X0.0102/22.67X2=24.566(KN)(8) △P2=[(EAXAL2_3)/L2+(EAAL2_3)/L1]X2=[(195X140X0.0102)/22.7+(195X140X0.0102)/19.3]X2=53.390(KN)

26米錨索張拉伸長(zhǎng)值計(jì)算表錨索長(zhǎng)度單根長(zhǎng)度單根受力鋼絞線理論伸長(zhǎng)量單根長(zhǎng)度+1/2錨固段鋼絞線最大伸長(zhǎng)量263.3322.6722666.6783333.3369.201666.6724333.3374.283.3319.3319333.3383333.3359.001666.6721000.0064.103.3316.0016000.0083333.3348.801666.6717666.6753.93設(shè)計(jì)張拉力(KN)500錨索長(zhǎng)度(m)26錨固長(zhǎng)度(m)10自由段長(zhǎng)度(M)L122.67L219.33L316.0000張拉力(KN)差異荷載(KN)△P1△P215%25%50%75%100%110%24.56653.39075125250375500550油表讀數(shù)(MPa)0.371.903.065.7212.3919.0525.7128.38錨索張拉伸長(zhǎng)值(mm)△L169.2010.3817.3034.6051.8969.1976.11△L259.008.8514.7529.5144.2659.0264.92△L348.807.3312.2124.4236.6348.8453.7210.1820.3527.6832.5644.7756.9869.1974.07△L10.18△L”10.18油表千斤頂方程式：Y=0.0533X-0.94三、 24米預(yù)應(yīng)力錨索張拉（4孔6索）計(jì)算：3、已知條件：錨索長(zhǎng):24m,錨固長(zhǎng):10m設(shè)計(jì)拉力500KN,A=140mm2,E=195(取中值)，P=83.33KN,L1=20.67m,L2=17.33m，L3=14.0m。4、計(jì)算公式：o=P/AAL12=AJ-AL4、計(jì)算公式：1-212AL2-3AL2-3=AL2-AL322)34567)AL1=o/EXL1 AL2=o/EXL2al3=o/exl3△P]=[(EAXAL1-2)/L1]X2△P2=[(EAXAL2_3)/L2+(EAAL2_3)/L1]X2(1)o=P/A=83.33/140=0.5952AL1=o/EXL1=0.5952/195X20.67=0.0631AL2=o/EXL2=0.5952/195X17.33=0.0529AL3=o/EXL3=0.5952/195X14.0=0.0427AL1-2=AL1-AL2=0.0631-0.0529=0.0102m1-212AL2-3=AL2-AL3=0.0529-0.0427=0.0102m△P1=[(EAX△L1-2)/L1]X2=140X195X0.0102/20.67X2=26.943(KN)(8) △P2=[(EAXAL2_3)/L2+(EAAL2_3)/L1]X2=[(195X140X0.0102)/17.33+(195X140X0.0102)/20.67]X2=59.080(KN)

24米錨索張拉伸長(zhǎng)值計(jì)算表錨索長(zhǎng)度單根長(zhǎng)度單根受力鋼絞線理論伸長(zhǎng)量單根長(zhǎng)度+1/2錨固段鋼絞線最大伸長(zhǎng)量243.3320.6720666.6783333.3363.091666.6722333.3368.173.3317.3317333.3383333.3352.911666.6719000.0058.003.3314.0014000.0083333.3342.741666.6715666.6747.82設(shè)計(jì)張拉力（KN）500錨索長(zhǎng)度（m）24錨固長(zhǎng)度（m）10自由段長(zhǎng)度（M）L120.67L217.33L314.00張拉力（KN）差異荷載（KN）△P1△P215%25%50%75%100%110%26.9459.0875125250375500550油表讀數(shù)（MPa）0.492.203.065.7212.3919.0525.7128.38錨索張拉伸長(zhǎng)值（mm）△L163.099.4615.7731.5447.3163.0969.39△L252.917.9413.2326.4639.6852.9158.20△L342.746.4110.6821.3732.0542.7447.0110.1820.3526.7631.0341.7252.4063.0967.36△L1-210.18△L2-310.18油表千斤頂方程式：Y=0.0533X-0.94四、 22米預(yù)應(yīng)力錨索張拉（4孔6索）計(jì)算：5、已知條件：錨索長(zhǎng):22m,錨固長(zhǎng):10m設(shè)計(jì)拉力500KN,A=140mm2,E=195(取中值)，P=83.33KN,L1=18.67m,L2=15.33m，L3=12.00m。6、計(jì)算公式：o=P/AAL12=AJ-AL6、計(jì)算公式：1-212AL2-3AL2-3=AL2-AL322)34567)AL1=o/EXL1 AL2=o/EXL2al3=o/exl3△P產(chǎn)[(EAXAL1-2)/L1]X2△P2=[(EAXAL2_3)/L2+(EAAL2_3)/L1]X2(1)o=P/A=83.33/140=0.5929AL1=o/EXL1=0.5929/195X18.67=0.0568AL2=o/EXL2=0.5929/195X15.33=0.0466AL3=o/EXL3=0.5929/195X12.0=0.0365AL1-2=AL1-AL2=0.0568-0.0466=0.0102m1-212AL2-3=AL2-AL3=0.0466-0.0365=0.0101m2-3 2 3△P1=[(EAX△L1-2)/L1]X2=140X195X0.0102/18.67X2=29.830(KN)(8) △P2=[(EAXAL2_3)/L2+(EAAL2_3)/L1]X2=[(195X140X0.0101)/15.33+(195X140X0.0101)/18.67]X2=65.510(KN)

22米錨索張拉伸長(zhǎng)值計(jì)算表錨索長(zhǎng)度單根長(zhǎng)度單根受力鋼絞線理論伸長(zhǎng)量單根長(zhǎng)度+1/2錨固段鋼絞線最大伸長(zhǎng)量223.3318.6718666.6783333.3356.801666.6720333.3362.073.3315.3315333.3383333.3346.661666.6717000.0051.893.3312.0012000.0083333.3336.501666.6713666.6741.72設(shè)計(jì)張拉力（KN）500錨索長(zhǎng)度（m）22錨固長(zhǎng)度（m）10自由段長(zhǎng)度（M）L118.67L215.33L312.0000張拉力（KN）差異荷載（KN）△P1△P215%25%50%75%100%110%29.8365.5175125250375500550油表讀數(shù)（MPa）0.652.583.06