承台大体积混凝土温控.doc

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1、【精品文档】如有侵权，请联系网站删除，仅供学习与交流承台大体积混凝土温控.精品文档.阳逻长江大桥北标段主塔承台大体积混凝土配合比设计及温控施工方案武汉理工大学二OO四年三月一、 工程概况阳逻长江大桥主塔墩承台平面尺寸为21.6m21.6m,高6m,混凝土设计标号为C30。承台属重要的大体积混凝土结构，混凝土方量相当大，必须采取专门措施防止因为混凝土水化热温升而出现温度裂缝，以满足设计要求，保证大桥的长期安全使用。受大桥局阳逻大桥项目经理部的委托，武汉理工大学对阳逻大桥承台大体积混凝土进行了温控计算，得出了大体积混凝土内部仿真温度场和应力场，根据计算结果制定了承台不出现有害温度裂缝的温控标准，并

2、以此制定了相应的温控措施。温控计算采用有限元程序大体积砼施工期温度场及温度应力场计算程序包进行。二、承台部位C30强度等级大体积混凝土配合比表1编号水(kg/m3)水泥(kg/m3)粉煤灰(kg/m3)砂(kg/m3)石(kg/m3)减水剂(kg/m3)坍落度(cm)28d抗压强度(Mpa)0h2h117233010071510739.422.51843.221753508071410719.4211646.5317230013071510739.4231838.64165280*12072810959.021.51740.3注：减水剂引入的水量已包含在用水量中。原材料：水泥：第1、2、3组：

3、葛洲坝水泥厂矿渣PS32.5#水泥； 第4组：华新PS32.5#矿渣水泥;粉煤灰：阳逻电厂I级灰,需水量比92%，烧失量2.9%;砂：巴河中砂2.3-3.1;石：5-31.5mm碎石;减水剂：武钢浩源FDN-9001高效减水剂（水剂）。 考虑混凝土强度、工作性能及经济性，建议若使用葛洲坝矿渣PS32.5水泥选择第1组配方，若使用华新PS32.5矿渣水泥选择第4组配方。三、 温控计算1 计算条件1.1 施工时间及进度等施工时间：按4月中下旬。施工进度：3m/层，浇筑时间1-2d；间歇期8d。通水方式及时间：砼浇筑到各层冷却水管标高后即开始通水，通水时间15d，通水水温17.4；为防止冬季混凝土内

4、外温差过大，12月1日进行后期通水，通水时间按混凝土温度降到16.5控制，通水水温14.0。浇筑温度：20。放热系数：草袋保温（保温时间2个月）时=3.2W/m2，其它时间=14W/m2。导温系数：0.07 m2/d。线膨胀系数：8.910-6/.1.2 混凝土力学参数混凝土容重 2400kg/m3混凝土绝热温升：混凝土弹性模量：混凝土徐变度：1. 3气温 ，另外加3辐射热 ，起点为1月1日。 2 计算结果根据表1混凝土配合比第1组计算（水泥为葛洲坝水泥厂矿渣PS32.5#水泥）。2.1 温度 第一层浇筑第5天板内达到最高温度47.8，第二层浇筑第5天板内达到最高温度48.5。中心点温度历时过

5、程见图1。冬季内外温差小于20。(时间原点为2004年元月1日，4月20日开始浇筑施工时为图表上第111天，浇筑温度为20)。图1 温度历时过程线表2 各部位混凝土内温度随时间变化值时间距顶面4.5m处(距底面1.5m)温度（）距顶面1.5m处(距底面4.5m)温度（）顶面温度（）0000100002000030000400005000060000700008000090000100000110000111（即4月20日，开始浇筑第一层）200011237.540011343.940011446.720011547.760011647.820011747.30011846.4400119（即4

6、月28日，开始浇筑第二层）45.37202012045.3137.5633.6512145.1244.0336.7312244.8946.9837.3212344.6948.2337.0812444.5348.5436.5212544.4148.2735.8512644.3147.6635.1512744.2146.8434.4712844.1147.0734.5112944.0147.1934.4713043.947.2234.413143.7947.1834.3113243.6947.0934.2213343.5946.9734.1413443.4946.8334.0613543.4146

7、.6633.9813643.3246.4833.9113743.2446.2833.8513843.1546.0833.7913943.0745.8733.7414042.9945.6633.714142.945.4533.6714242.8245.2333.6414342.7445.0233.6114442.6544.8133.5914542.5744.633.5814642.4844.3933.5714742.3944.1933.5614842.343.9933.5614942.2143.833.5615042.1243.633.5615142.0343.4233.5715241.9443

8、.2333.5715341.8543.0533.5815441.7642.8833.615541.6642.7133.6115641.5742.5433.6315741.4742.3833.6415841.3842.2233.6615941.2842.0633.6816041.1941.9133.716141.0941.7633.721624141.6233.7416340.941.4833.7616440.8141.3433.7816540.7141.2133.816640.6241.0833.8216740.5240.9533.8416840.4340.8333.8616940.3340.

9、7133.8917040.2440.5933.9117140.1540.4733.9217240.0540.3633.9417339.9640.2533.9617439.8740.1433.9817539.7840.0433.9917639.6939.9434.0117739.639.8434.0217839.5139.7434.0417939.4239.6434.0518039.3339.5532.7818139.2439.4532.518239.1539.3432.4218339.0739.2232.3918438.9839.0932.3918538.8938.9632.3918638.8

10、138.8332.3918738.7338.732.418838.6438.5832.4118938.5638.4632.4219038.4838.3432.4219138.3938.2232.4319238.3138.1132.4319338.2338.0132.4319438.1537.932.4319538.0737.832.4219637.9937.732.4219737.9137.6132.4119837.8337.5132.3919937.7537.4232.3820037.6737.3332.3620137.637.2532.3420237.5237.1632.3120337.4

11、437.0732.2920437.3636.9932.2620537.2936.9132.2220637.2136.8332.1920737.1436.7432.1520837.0636.6632.120936.9936.5832.0621036.9136.532.0121136.8436.4231.9621236.7636.3531.921336.6936.2731.8421436.6236.1931.7821536.5536.1131.7221636.4736.0331.6521736.435.9531.5821836.3335.8731.5121936.2635.7931.4322036

12、.1935.7131.3522136.1235.6331.2722236.0535.5531.1822335.9835.4731.0922435.9135.393122535.8535.3130.922635.7835.2330.8122735.7135.1430.722835.6435.0630.622935.5834.9730.4923035.5134.8930.3823135.4534.830.2723235.3834.7230.1523335.3134.6330.0423435.2534.5429.9223535.1834.4529.7923635.1234.3629.6623735.

13、0634.2729.5423834.9934.1729.423934.9334.0829.2724034.8733.9929.1324134.833.8928.9924234.7433.7928.8524334.6833.728.7124434.6133.628.5624534.5533.528.4124634.4933.428.2624734.4333.328.124834.3733.1927.9524934.333.0927.7925034.2432.9927.6325134.1832.8827.4625234.1232.7727.325334.0632.6627.132543432.55

14、26.9625533.9432.4426.7925633.8732.3326.6225733.8132.2226.4425833.7532.1126.2725933.6931.9926.0926033.6331.8825.9126133.5731.7625.7326233.5131.6425.5426333.4531.5225.3626433.3931.425.1726533.3231.2824.9826633.2631.1624.7926733.231.0324.626833.1430.9124.4126933.0830.7824.2227033.0230.6624.0227132.9630

15、.5323.8327232.930.423.6327332.8330.2723.4327432.7730.1423.2327532.7130.0123.0327632.6529.8822.8327732.5929.7422.6327832.5229.6122.4327932.4629.4822.2328032.429.3422.0228132.3429.221.8228232.2729.0721.6128332.2128.9321.4128432.1528.7921.228532.0828.652128632.0228.5120.7928731.9628.3720.5928831.8928.2

16、320.3828931.8328.0820.1729031.7627.9419.9729131.727.819.7629231.6327.6519.5529331.5727.5119.3529431.527.3619.1429531.4427.2218.9429631.3727.0718.7329731.326.9218.5329831.2426.7818.3229931.1726.6318.1230031.126.4817.9130131.0426.3317.7130230.9726.1817.5130330.926.0417.3130430.8325.8917.1130530.7725.7

17、416.9130630.725.5916.7130730.6325.4416.5130830.5625.2916.3130930.4925.1416.1231030.4224.9915.9231130.3524.8415.7331230.2824.6915.5331330.2124.5415.3431430.1424.3915.1531530.0724.2414.973163024.0914.7831729.9323.9414.5931829.8623.7914.4131929.7923.6414.2332029.7223.4914.0532129.6423.3413.8732229.5723

18、.1913.6932329.523.0413.5232429.4322.8913.3432529.3522.7513.1732629.2822.61332729.2122.4512.8332829.1322.3112.6732929.0622.1612.5133028.9822.0212.3433128.9121.8712.1933228.8421.7312.0333328.7621.5811.8833428.6921.4411.7233528.0321.0111.5733627.420.611.4233726.820.2111.2733826.2219.8411.1233925.6819.5

19、10.9634025.1619.1610.8134124.6718.8410.6634224.218.5410.5134323.7618.2410.3634423.3517.9810.2234522.9517.7310.0934622.5817.489.9634722.2217.259.8334821.8917.029.7134921.5716.89.5935021.2616.589.4735120.9716.479.3535220.716.329.2435320.4416.159.1335420.1915.979.0335519.9615.88.9335619.7315.628.833571

20、9.5215.458.7435819.3215.288.6535919.1215.138.5636018.9414.998.4836118.7614.858.436218.5914.728.3336318.4414.588.2536418.2814.458.1936518.1414.318.123661814.198.0636717.8714.07836817.7413.957.9536917.6213.847.937017.5113.737.8637117.413.627.8137217.2913.527.7737317.213.427.7437417.1113.327.7137517.02

21、13.227.6837616.9513.137.6537716.8813.047.6337816.8112.967.6237916.7412.887.638016.712.87.5938116.6512.727.5938216.6112.657.5838316.5712.577.5938416.5312.517.5938516.4912.447.638616.4512.387.6138716.4112.327.6338816.4712.267.6438916.4812.27.6739016.4812.157.6939116.4712.17.7239216.4512.057.7639316.42

22、127.7939416.411.967.8339516.3711.927.8839616.3711.887.9239716.3711.847.9739816.3811.818.0339916.3911.788.0840016.411.758.1540116.4111.728.2140216.4211.78.2840316.4211.688.3540416.4311.668.4240516.4411.648.540616.4411.638.5840716.4511.628.6640816.4511.618.7540916.4511.68.8441016.4511.598.9341116.4611

23、.599.0341216.4511.599.1341316.4511.69.2341416.4511.69.3441516.4511.619.4541616.4511.629.5641716.4411.639.6741816.4411.659.7941916.4311.669.9142016.4311.6810.0342116.4211.710.1642216.4211.7310.2942316.4111.7510.4242416.411.7810.5542516.411.8110.6942616.3911.8510.8342716.3811.8810.9742816.3811.9211.11

24、42916.3711.9611.2643016.361211.4143116.3512.0411.5643216.3512.0911.7143316.3412.1411.8743416.3312.1912.0343516.3312.2412.1943616.3212.2912.3543716.3112.3512.5143816.3112.4112.6843916.312.4712.8544016.2912.5313.0244116.2912.5913.1944216.2812.6613.3744316.2812.7213.5444416.2712.7913.7244516.2712.8613.

25、944616.2612.9314.0844716.2613.0114.2644816.2613.0814.4544916.2513.1614.6345016.2513.2414.8245116.2513.3215.0145216.2513.415.245316.2413.4915.3945416.2413.5715.5845516.2413.6615.7745616.2413.7515.9745716.2413.8416.1645816.2413.9316.3645916.2514.0216.5546016.2514.1116.7546116.2514.2116.9546216.2514.31

26、17.1546316.2614.417.3546416.2614.517.5546516.2614.617.7546616.2714.717.9546716.2714.8118.1546816.2814.9118.3646916.2915.0218.5647016.2915.1218.7647116.315.2318.9647216.3115.3419.1747316.3215.4519.3747416.3315.5619.5747516.3415.6719.7847616.3515.7819.9847716.3615.8920.1847816.3716.0120.3847916.3816.1

27、220.5948016.416.2420.7948116.4116.3520.9948216.4216.4721.1948316.4416.5921.3948416.4516.721.5948516.4716.8221.7948616.4916.9421.9948716.517.0622.1948816.5217.1822.3848916.5417.322.5849016.5617.4322.7749116.5817.5522.9749216.617.6723.1649316.6217.7923.3549416.6417.9123.5449516.6618.0423.7349616.6818.

28、1623.9249716.7118.2824.149816.7318.4124.2949916.7518.5324.4750016.7818.6624.6550116.818.7824.8450216.8318.925.0150316.8619.0325.1950416.8819.1525.3750516.9119.2825.5450616.9419.425.7150716.9719.5225.885081719.6526.0550917.0319.7726.2251017.0619.8926.3851117.0920.0126.5451217.1220.1426.751317.1520.26

29、26.8651417.1820.3827.0251517.2120.527.1751617.2520.6227.3251717.2820.7427.4751817.3120.8627.6151917.3520.9827.7652017.3821.127.952117.4221.2228.0452217.4521.3428.1752317.4921.4528.3152417.5321.5728.4452517.5621.6828.5752617.621.828.6952717.6421.9128.8152817.6822.0228.9352917.7122.1429.0553017.7522.2

30、529.1653117.7922.3629.2753217.8322.4729.3853317.8722.5729.4953417.9122.6829.5953517.9522.7929.6953617.9922.8929.7953718.0322.9929.8853818.0723.129.9753918.1223.230.0654018.1623.330.1454118.223.430.2254218.2423.4930.354318.2823.5930.3754418.3323.6930.4454518.3723.7830.5154618.4123.8730.5754718.4623.9

31、630.6354818.524.0530.6954918.5424.1430.7555018.5924.2230.855118.6324.3130.8455218.6724.3930.8955318.7224.4730.9355418.7624.5530.9755518.8124.633155618.8524.7131.0355718.924.7931.0655818.9424.8631.0855918.9924.9331.156019.032531.1256119.0725.0731.1356219.1225.1431.1456319.1625.231.1556419.2125.2631.1

32、556519.2525.3331.1556619.325.3931.1456719.3425.4431.1356819.3925.531.1256919.4325.5531.1157019.4725.631.0957119.5225.6531.0757219.5625.731.0457319.6125.7531.0157419.6525.7930.9857519.6925.8430.9557619.7425.8830.9157719.7825.9230.8657819.8225.9530.8257919.8725.9930.7758019.9126.0230.7258119.9526.0530

33、.6658219.9926.0830.658320.0326.130.5458420.0826.1330.4758520.1226.1530.458620.1626.1730.3358720.226.1930.2558820.2426.2130.1858920.2826.2230.0959020.3226.2330.0159120.3626.2429.9259220.426.2529.8359320.4426.2629.7359420.4826.2629.6459520.5126.2629.5359620.5526.2629.4359720.5926.2629.3259820.6326.252

34、9.2159920.6626.2529.160020.726.2428.9960120.7326.2328.8760220.7726.2128.7560320.826.228.6260420.8426.1828.560520.8726.1628.3760620.9126.1428.2360720.9426.1228.160820.9726.0927.966092126.0727.8261021.0326.0427.6861121.0726.0127.5361221.125.9727.3961321.1325.9427.2461421.1525.927.0961521.1825.8626.9361621.2125.8226.7861721.2425.7826.6261821.2725.7326.4661921.2925.6926.2962021.3225.6426.1362121.3425.5925.9662221.3725.5425.7962321.3925.4825.6262421.4125.4325.4562521.4425.3725.2762621.4625.3125.162721.4825.2524.9262821.525.1824.7462921.5225.1224.5663021.5425.0524.3863121