后张法预制T梁钢绞线张拉伸长量计算.doc

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1、promotion of employment, form a reasonable and orderly pattern of income distribution, build a more fair and sustainable social security systems, medical and health system reform. The plenary, innovation of social governance, must focus on the maintenance of fundamental interests of the overwhelming

2、 majority of the people, maximize factors, enhance social development, improving social governance, the interests of national security, ensure that the people live and work, social stability and order. To improve social governance, stimulating social organization, innovative and effective system of

3、preventing and resolving social conflicts, improving the public security system, set up the National Security Council, national security systems and national security strategy to ensure national security. Plenary session, the construction of ecological civilization, you must establish systems of eco

4、logical system, using the system to protect the ecological environment. To improve natural resources asset property right system and use control, red line of delimitation of ecological protection, resources paid use system and ecological compensation system in ecological environment protection manag

5、ement system reform. Plenary session, centering on building a listening party command, can win and having a fine style of the peoples army, a strong army under the new situation of the party Goals, restricting the development of national defense and army building is solved outstanding contradictions

6、 and problems, innovation and development of military theory, enhance military strategic guidance, improve the military strategy in the new period, building a modern military force system with Chinese characteristics. To deepen the adjustment of personnel system reform in the army, military policy a

7、nd system reform, promote the development of military and civilian integration depth. Plenary session stressed that comprehensive reform must be to strengthen and improve the partys leadership, give full play to the core role of the party commands the overall situation and coordinating all parties,

8、improving the partys leading water . Margin. Challenged the leadership of the Communist Party of China, Marxism-Leninism and Mao Zedong thought by Deng Xiao-pings flag, replaced by three representatives and the harmonic society. The former Communist Party spirit and social cohesion point of almost a

9、ll political makeover. Characteristics of socialism public ownership is shifting to private ownership, planned regulation and market regulation, the proletarian regime controlled by the elite. Of universal equality, fairness and basic principles of distribution system is socialist society, however a

10、fter economic monopolized by powerful, vested interests grow, employers do not have the same status, hardly seems fair social distribution. State key protection of capital interests rather than the interests of citizens, had been hits the bottom of the proletariat后 张 法 预 制 T 梁 （30m）钢绞线张拉伸长量计算书长深高速公路

11、LJ4标后张法预制T梁钢绞线张拉伸长量计算遵化南互通板梁预制厂位于遵化南互通区内，占地23亩。预制厂内设26个后张法T梁台座，负责生产302片T梁。所有T梁均采用C50砼浇筑。预应力钢绞线采用GB/T5224-2003标准的高强低松弛15.2mm预应力钢绞线。钢绞线标准强度=1860Mpa。所有预应力钢绞线采用张拉和伸长值双控张拉施工，张拉控制应力按设计施工图正弯矩采用=0.73=0.731860 Mpa=1357.8 Mpa。根据天津市市政公路材料试验管理局试验中心的检测结果，我部进场的钢绞线弹性模量为=1.95105Mpa，单根公称截面积为Ay=1357.810314010-6=190.0

12、9KN。T梁的张拉施工工艺及计算数据如下。一、 张拉施工工艺及程序：根据公路桥涵施工技术规范和设计图纸规定，张拉施工控制采用张拉和伸长值双控方式很圆锚整体张拉、扁锚单根张拉的施工工艺。张拉施工程序如下：低松弛预应力钢绞线0初应力（持荷两分钟）锚固，即用两个150t千斤顶两端同时张拉，初应力为的10%，此时的伸长值为，其值采用相邻级的伸长值。控制张拉应为=0.73=0.731860 Mpa=1357.8 Mpa即为末张的应力值。其中伸长值=，为开始至初张的伸长量，为初张至末张间的伸长量。张拉完毕后，与计算伸长值比较，其伸长值误差不应超过6%，否则应停止张拉，查明原因。二、 计算参数：1、15.2

13、钢绞线的弹性模量：=1.95105Mpa2、15.2钢绞线的张拉控制应力：正弯矩：=0.73=0.731860 Mpa=1357.8 Mpa3、孔道摩阻系数：=0.254、孔道每米局部偏差对摩擦的影响系数：k=0.0015三、 张拉伸长量计算：1、 计算公式： 式中： P钢绞线张拉力 预应力钢绞线的计算伸长量 L预应力钢绞线的长度预应力钢绞线的弹性模量钢绞线的截面积简化计算式：钢绞线平均张拉力， 预应力钢绞线的计算伸长量 L预应力钢绞线的长度预应力钢绞线的弹性模量钢绞线的截面积2、 张拉伸长量计算表：30米T梁边跨边梁钢束编号孔道长度（米）工作长度（米）钢绞线根数（根）夹角（rad）（m）正弯

14、矩N139.3041.290.12217300.96345370.206866N239.3581.290.15707960.96451870.206836N329.5131.270.13962630.96454730.206566N429.4731.270.13962630.96457590.20630630米T梁边跨中梁钢束编号孔道长度（米）工作长度（米）钢绞线根数（根）夹角（rad）（m）正弯矩N129.591.270.12217300.96345370.206866N229.5531.270.11344640.96451870.206836N329.5131.260.11344640.9

15、6454730.206566N429.4731.260.11344640.96457590.20630630米T梁中跨边梁钢束编号孔道长度（米）工作长度（米）钢绞线根数（根）夹角（rad）（m）正弯矩N129.551.270.12217300.96348220.206596N229.511.270.11344640.96454730.206566N329.4731.260.11344640.96457590.206306N429.4331.260.11344640.96457590.20604630米T梁中跨中梁钢束编号孔道长度（米）工作长度（米）钢绞线根数（根）夹角（rad）（m）正弯矩N1

16、29.551.260.12217300.96348220.206596N229.511.260.11344640.96454730.206566N329.4731.260.11344640.96457590.206306N429.4331.260.11344640.96457590.206046四、预应力T梁控制张拉力计算：1、边跨边梁N1、N2、N3、N4，边跨中梁N1、N2，中跨边梁N1、N2：FK= n=0.73186010370.14010-3 =1330.644KN2、边跨中梁N3、N4，中跨边梁N3、N4，中跨中梁N1、N2、N3、N4：FK= n=0.73186010360.14

17、010-3 =1140.552KN五、 张拉数据表：1、 边跨边梁N1，边跨中梁N1正弯矩钢绞线：分级张拉顺序平均张拉力（KN）控制张拉力（KN）张拉控制应力（Mpa）油表读数伸长量（cm）备注8384858610%张拉力128.20133.06135.784.33.74.24.22.0720%张拉力256.40266.13271.568.57.88.48.44.1440%张拉力512.81532.26543.1216.916.216.816.78.2760%张拉力769.21798.39814.6825.324.525.225.112.4180%张拉力1025.611064.521086.2

18、433.632.933.733.516.55100%张拉力1282.011330.6441357.842.041.242.141.820.692、 边跨边梁N2、边跨中梁N2正弯矩钢绞线：分级张拉顺序平均张拉力（KN）控制张拉力（KN）张拉控制应力（Mpa）油表读数伸长量（cm）备注8384858610%张拉力128.34133.06135.784.33.74.24.22.0720%张拉力256.69266.13271.568.57.88.48.44.1440%张拉力512.37532.26543.1216.916.216.816.88.2760%张拉力770.06798.39814.6825

19、.324.525.225.112.4180%张拉力1026.741064.521086.2433.632.933.733.516.55100%张拉力1283.431330.6441357.842.141.242.241.920.693、 边跨边梁正弯矩钢绞线（N3）：分级张拉顺序平均张拉力（KN）控制张拉力（KN）张拉控制应力（Mpa）油表读数伸长量（cm）备注8384858610%张拉力128.35133.06135.784.33.74.24.22.0720%张拉力256.69266.13271.568.57.88.48.44.1340%张拉力513.39532.26543.1216.916

20、.216.816.88.2760%张拉力770.08798.39814.6825.324.525.325.112.3980%张拉力1026.781064.521086.2433.732.933.733.516.52100%张拉力1283.471330.6441357.842.141.242.241.920.664、 边跨边梁正弯矩钢绞线（N4）：分级张拉顺序平均张拉力（KN）控制张拉力（KN）张拉控制应力（Mpa）油表读数伸长量（cm）备注8384858610%张拉力128.35133.06135.784.33.74.24.22.0620%张拉力256.7266.13271.568.57.88

21、.48.44.1340%张拉力513.40532.26543.1216.916.216.816.88.2560%张拉力770.10798.39814.6825.324.525.325.112.3880%张拉力1026.811064.521086.2433.732.933.733.516.50100%张拉力1283.511330.6441357.842.141.342.241.920.635、 边跨中梁正弯矩钢绞线（N3）：分级张拉顺序平均张拉力（KN）控制张拉力（KN）张拉控制应力（Mpa）油表读数伸长量（cm）备注8384858610%张拉力110.01114.06135.783.73.13

22、.63.62.0720%张拉力220.02228.11271.567.36.77.27.24.1340%张拉力440.05456.22543.1214.513.814.414.48.2660%张拉力660.07684.33814.6821.721.021.721.512.3980%张拉力880.09912.441086.2428.928.128.928.716.52100%张拉力1100.121140.5521357.836.135.336.135.920.666、 边跨中梁N4，中跨边梁N3，中跨中梁N3正弯矩钢绞线：分级张拉顺序平均张拉力（KN）控制张拉力（KN）张拉控制应力（Mpa）油表

23、读数伸长量（cm）备注8384858610%张拉力110.01114.06135.783.73.13.63.62.0620%张拉力220.03228.11271.567.36.77.27.24.1340%张拉力440.06456.22543.1214.513.814.414.48.2560%张拉力660.09684.33814.6821.721.021.721.512.3880%张拉力880.12912.441086.2428.928.128.928.716.50100%张拉力1100.151140.5521357.836.135.336.135.920.637、 中跨边梁正弯矩钢绞线（N1）

24、：分级张拉顺序平均张拉力（KN）控制张拉力（KN）张拉控制应力（Mpa）油表读数伸长量（cm）备注8384858610%张拉力128.21133.06135.784.33.74.24.22.0720%张拉力256.41266.13271.568.57.88.48.44.1340%张拉力512.82532.26543.1216.916.216.816.78.2660%张拉力769.23798.39814.6825.324.525.325.112.3980%张拉力1025.641064.521086.2433.632.933.733.516.52100%张拉力1282.051330.6441357

25、.842.041.242.141.820.668、 中跨边梁正弯矩钢绞线（N2）：分级张拉顺序平均张拉力（KN）控制张拉力（KN）张拉控制应力（Mpa）油表读数伸长量（cm）备注8384858610%张拉力128.35133.06135.784.33.74.24.22.0720%张拉力256.69266.13271.568.57.88.48.44.1340%张拉力513.39532.26543.1216.916.216.816.88.2660%张拉力770.08798.39814.6825.324.525.325.112.3980%张拉力1026.781064.521086.2433.732.

26、933.733.516.52100%张拉力1283.471330.6441357.842.141.242.241.920.669、 中跨边梁N4,中跨中梁N4正弯矩钢绞线：分级张拉顺序平均张拉力（KN）控制张拉力（KN）张拉控制应力（Mpa）油表读数伸长量（cm）备注8384858610%张拉力110.01114.06135.783.73.13.63.62.0620%张拉力220.03228.11271.567.36.77.27.24.1340%张拉力440.06456.22543.1214.513.814.414.48.2460%张拉力660.09684.33814.6821.721.021

27、.721.512.3680%张拉力880.12912.441086.2428.928.128.928.716.48100%张拉力1110.151140.5521357.836.135.336.135.920.6010、 中跨中梁正弯矩钢绞线（N1）：分级张拉顺序平均张拉力（KN）控制张拉力（KN）张拉控制应力（Mpa）油表读数伸长量（cm）备注8384858610%张拉力119.89114.06135.783.73.13.63.62.0720%张拉力219.78228.11271.567.36.67.27.24.1340%张拉力439.56456.22543.1214.513.814.414.

28、48.2660%张拉力659.34684.33814.6821.720.921.621.512.3980%张拉力879.12912.441086.2428.828.128.928.716.52100%张拉力1098.901140.5521357.836.035.336.135.920.6611、 中跨中梁正弯矩钢绞线（N2）：分级张拉顺序平均张拉力（KN）控制张拉力（KN）张拉控制应力（Mpa）油表读数伸长量（cm）备注8384858610%张拉力110.01114.06135.783.73.13.63.62.0720%张拉力220.02228.11271.567.36.77.27.24.13

29、40%张拉力440.05456.22543.1214.513.814.414.48.2660%张拉力660.07684.33814.6821.721.021.721.512.3980%张拉力880.09912.441086.2428.928.128.928.716.52100%张拉力1100.121140.5521357.836.135.336.135.920.66依据2009年5月29日标定1500KN千斤顶回归方程计算油表读数。2009R0083：y=30.596x-3.5082009R0084：y=30.738x-15.5412009R0085：y=30.392x-1.88382009R

30、0086：y=30.671x-0.8261Y 平均张拉应力（KN）或者控制张拉应力（KN）X 油表读数（MP）六、应注意事项：、张拉工必须熟悉张拉程序，具备预应力施工知识和正确的操作能力。、张拉现场应有明显标志，与该工作无关的人员严禁入内。、油泵运转有不正常情况时，应立即停止检查。在有压情况下，不得随意拧动油泵或千斤顶各部位的螺丝。、作业应由专人负责指挥，操作时严禁摸踩及碰撞预应力筋，在测量伸长量及拧螺母时，应停止开动千斤顶。、张拉时，千斤顶后面不得站人，以防预应力筋拉断或锚具弹出伤人。、张拉时，应使千斤顶的张拉应力作用线与预应力筋的轴线重合一致。、在高压油管的接头应处应防护套，以防喷油伤人。

31、、已张拉完毕尚未压浆的梁，严禁剧烈震动，已防预应力钢筋裂断而酿成重大事故。、预应力筋采用应力控制方法张拉，应以伸长值进行校核，切实际伸长量与理论伸长量差值控制在6%范围内，否则应暂停张拉，待查明原因并采取措施予以调整后，方可继续张拉。、预应力筋在张拉控制应力达到稳定后方可锚固。、张拉完毕后抽12根检查其张拉力是否达到规定的张拉力。其偏差的绝对值不得超过按一个构件全部力筋预应力总值的5%。、预应力筋张拉完毕后，与设计位置的偏差不得大于5mm，同时不得大于构件最短边长的4%。、预应力筋张拉完毕后，稍等几分钟再拆卸张拉设备。、注意测定孔道的预应力摩阻系数。Obviously, face Chinas

32、 Socialist system, the Communist Party is not the party. In that case, political chaos has been very tight. Is remodeling or reconstruction, is a correction or a stove. Whether to turn right or left, is back to the source or put forward new political ideas. This is to determine the road problems in

33、China, is also the key out of the deep water of the reform of the economic system. After 18, the new Central collective leadership attaches great importance to political orientation. First, the Central eight articles as a starting point, starting from the Central Governments self-restraint, which pr

34、eaches and pro-image, brought fresh feeling to the community. Secondly, before reform and opening up and reform and opening two periods after non-negative, untying the tangle of the society a long time on this issue. Third, a new generation of party leaders on various occasions to Mao Ze-Dong and Ma

35、o Ze-Dongs thought of evaluation has room for manoeuvre, through to the ruling ideology of Mao Zedong thought, is the call of the soul to the Socialist Revolution and construction. Empty talks jeopardize national interests and try again, is an affirmation of Deng Xiao-pings reform ideas. These stron

36、g political signal showing a new generation of political leaders is still keeping to the Socialist road. Four is revisiting the talking to Mao Ze-Dongs historical cycle of high profile anti-corruption and the importance of the Constitution, reorganization is bad style of officialdom, was to civilize

37、 people obey the law, while improving the color change of the regime of vigilance. Five is to reform into deeper waters and stressed that top-level design, this is a review on the reform and opening up in the past, is also looking for a way out. Six foreign and Russia closer, the flexible attitude o

38、n the issue of the Korean peninsula, Sino-Japanese fishing hardline China on the island out of the patient and low profile shadow began to gradually plan development. Signs show that the new leadership began to make a left turn in politics. However, as of right now, not only ideological confusion in

39、 the community, the new leaderships thinking is messy. New leaders both stressed the need to implement the Constitution, stressed the need to turn off the power in a cage. Also stresses that Mao Zedong thought cannot be lost, 30 years after the reform and opening up 30 years ago can not deny each ot

40、her. Both advocate democracy and release seven does not speak of files of political constraints. Neither deny the history of the CPC Central Committee on several issues .Comrades: today brings together members, mainly in order to provide a platform to Exchange and learn from each other in order to f

41、acilitate our work. Just now, we focus on taxation, planning and stability, safety, project construction, typical topics such as private facts presentation and interaction, and towns currently exist in the in-depth analysis of the problems to be solved, to explore new methods to solve the problem. It can be said that summing up the achievement, no grandstanding; analysis