樁身應力測試報告

1、第一章 工程概況一、工程概述工程名稱工程地點委托單位建設單位勘察單位設計單位基樁施工單位監(jiān)理單位檢測目的測試樁身軸力與樁側摩阻力檢測依據(jù)規(guī)范JGJ106-2003結構類型剪力墻層數(shù)46、32和30層樁型鉆孔灌注樁樁徑（mm）800設計樁長57.0m、67.0m和80.0m樁端持力層粉質(zhì)粘土、細砂試樁總數(shù)14棵施工日期2008.1.312.10檢測樁數(shù)9棵檢測日期2010.3.33.26砼強度等級C35抽測類型部分檢測單樁豎向抗壓拔承載力特征值6000 kN要求最大加載值12000 kN檢測方法靜載荷慢速維持荷載法過程中測量鋼筋應力計備注檢測現(xiàn)場溫度、濕度滿足檢測要求，無強振動、強磁場等干擾；其

2、中8#11#樓46層，13#14#樓32層，12#樓30層。二、工程地質(zhì)條件（工程地質(zhì)柱狀圖）根據(jù)*院提供的巖土工程勘察報告，該場地工程地質(zhì)條件如下：三、檢測樁位示意圖四、鋼筋應力計在樁身埋設位置示意圖鋼筋應力計在各試樁中位置示意圖鋼筋應力計埋設位置表序號檢測面編號80m樁埋設深度67m樁埋設深度57m樁埋設深度備 注1J11.81.81.8為標定斷面2J29.49.49.4各深度均為樁頂面往下計算3J314.314.314.34J423.323.323.35J530.130.130.16J636.536.536.57J73939398J845.745.745.79J951.751.751.7

3、10J1057.557.55757m樁樁端壓力盒11J117063.512J1273.66767m樁樁端壓力盒13J1377.514J1479.880m樁樁端壓力盒檢測樁號1#、3#、4#6#、7#、8#9#、10#、11#第二章 樁身內(nèi)力測試一、檢測目的本次檢測目的是測定在各級荷載作用下樁身不同位置的軸力和樁側摩阻力的分布情況。二、測試設備及鋼筋測力計的埋設1、每樁鋼筋應力計設置在各土層交界面處，每一個截面設2只鋼筋測力計（基本呈180對稱布置），各鋼筋應力計埋設截面的平、剖面圖如前圖；2、JTM-V1000振弦式鋼筋應力計采用焊接法固定在鋼筋籠主筋上，并與樁身縱軸線平行；3、連接在應力計的

4、電纜線用柔性材料保護，綁扎在鋼筋籠內(nèi)側并引至地面；4、所有應力計均用明顯標記編號；5、儀器設備：檢測儀器設備采用JTM-V1000振弦式鋼筋應力計、JTM-V10B型頻率讀數(shù)儀、集線箱等組成。三、測試原理1、假定：同一截面鋼筋與混凝土的變形協(xié)調(diào)；樁頂下砼彈性模量相同；位于樁頂面以下1.8m處的J1截面所受軸力與靜載荷試驗的加載量相同；2、樁身范圍內(nèi)砼彈性模量Ecij的確定：將J1截面作為標定截面(i=1)，量測該截面鋼筋應力計在包括預壓的各級荷載作用下頻率變化值，用此推算各載荷等級下鋼筋應變s1j，由于假定砼與鋼筋協(xié)同受力，不出現(xiàn)裂縫，故砼應變c1j=s1j，由此可以算出各載荷等級下樁身砼的彈

5、性模量Ec1j。利用鋼筋應變s1j與樁身砼的彈性模量Ec1j的兩組數(shù)據(jù)可以擬合出關于兩者之間的相關關系，根據(jù)其余各截面在各載荷等級下鋼筋應變sij，再通過其相關關系可以得到各截面在各載荷等級下的Ecij；3、某一截面樁身軸力PZj計算公式為：式中： Ecj、Esj 砼彈性模量、鋼筋彈性模量Es取2.0108(kPa) Acj、Asj 同一截面處砼面積、鋼筋總面積。cj、sj同一截面處砼與鋼筋的應變4、鋼筋應力計受力的計算公式：式中： PSij第i量測截面處在j級荷載下應力計所受軸向力（kN） Fij第i量測截面處在j級荷載下應力計的實測頻率值(Hz) Fi0i截面處鋼筋應力計的初始頻率值（Hz

6、）K應力計標定系數(shù) Asi第i量測截面應力計面積(cm2)5、第i量測截面處在第j級荷載下的樁身軸力：6、樁側摩阻力計算fij：式中：fiji截面至i+1截面之間在第j級荷載量下的樁側摩阻力(kPa) Piji截面在j級荷載量下的軸力(kN)Aii截面至i+1截面之間的樁側面積(m2)四、測試步驟1、將弦式鋼筋應力計按產(chǎn)品使用要求預埋在試樁樁身指定位置；2、弦式鋼筋應力計宜放在兩種不同性質(zhì)土層的界面處，以測量樁在不同土層中的分層摩阻力。在地面處(或以上)應設置一個測量斷面作為鋼筋應力計傳感器標定斷面。鋼筋應力計埋設斷面距樁頂和樁底的距離不宜小于1倍樁徑。在同一斷面處對稱設置2個鋼筋應力計。鋼筋

7、計應按主筋直徑大小選擇。儀器的可測頻率范圍應大于樁在最大加載時的頻率的1.2倍；3、使用前應對鋼筋計逐個標定，得出壓力(拉力)與頻率之間的關系。帶有接長桿弦式鋼筋計可焊接在主筋上；弦式鋼筋計通過與之匹配的頻率儀進行測量，頻率儀的分辨力應優(yōu)于或等于1Hz；4、在載荷試驗時進行樁身內(nèi)力測試。五、實測曲線1#樁樁身軸力分布圖 1#樁樁身側摩阻力分布圖3#樁樁身軸力分布圖 3#樁樁身側摩阻力分布圖4#樁樁身軸力分布圖 4#樁樁身側摩阻力分布圖6#樁樁身軸力分布圖 6#樁樁身側摩阻力分布圖7#樁樁身軸力分布圖 7#樁樁身側摩阻力分布圖8#樁樁身軸力分布圖 8#樁樁身側摩阻力分布圖9#樁樁身軸力分布圖 9

8、#樁樁身側摩阻力分布圖10#樁樁身軸力分布圖 10#樁樁身側摩阻力分布圖11#樁樁身軸力分布圖 11#樁樁身側摩阻力分布圖六、檢測成果匯總1#樁身軸力數(shù)據(jù)表(kN)截面序號深度加載等級123456789J11.8 24003600480060007200840096001080012000J29.4 2017.33052.84078.15078.96225.27457.38652.89859.111060J314.3 1593.62593.73476.34271.65348.86523.67695.78891.210050.4J423.3 912.61831.32547.33109.34111

9、.65201.26298.37401.58252.3J530.1 732.31469.32153.72533.23401.74392.35451.36505.47106.3J636.5 623.41109.31710.32053.22872.33837.34781.75750.26122.1J739.0 584.3979.61555.21857.72646.53551.24482.15405.75683.6J845.7 263.7415.7796.31072.51721.32503.33259.24033.44258.2J951.7 186.2306.3573.6833.51375.32115

10、.22721.63302.63505.3J1057.2 73.7122.1292.6495.8943.71478.61981.72425.92592.6J117018.930.548.672.4229.1378.3429.7527.5587.5J1273.811.419.833.951.275.6102.7136.2198.1229.3J1377.54.55.37.69.712.115.324.134.239.7J1479.83.84.14.45.77.89.411.613.815.81#樁身側壁摩阻力數(shù)據(jù)表(kPa)截面序號深度范圍加載等級123456789J1-J21.8-9.420.03

11、6 28.648 37.794 48.223 51.034 49.354 49.589 49.259 49.212 J2-J39.4-14.334.405 37.280 48.867 65.554 71.165 75.818 77.718 78.595 81.981 J3-J414.3-23.330.107 33.705 41.071 51.385 54.696 58.463 61.779 65.859 79.493 J4-J523.3-30.110.550 21.182 23.031 33.709 41.538 47.331 49.560 52.433 67.056 J5-J630.1-36

12、.56.770 22.381 27.566 29.842 32.913 34.504 41.629 46.951 61.188 J6-J736.5-39.06.223 20.642 24.685 31.115 35.937 45.534 47.683 54.829 69.789 J7-J839.0-45.719.039 33.488 45.068 46.630 54.944 62.231 72.623 81.496 84.649 J8-J945.7-51.75.139 7.255 14.768 15.849 22.945 25.737 35.651 48.463 49.928 J9-J1051

13、.7-57.57.718 12.636 19.277 23.167 29.608 43.672 50.758 60.143 62.612 J10-J1157.5-70.01.744 2.916 7.767 13.477 22.746 35.024 49.402 60.428 63.824 J11-J1270.0-73.60.829 1.183 1.625 2.343 16.965 30.460 32.439 36.407 39.590 J12-J1373.6-77.50.704 1.479 2.683 4.234 6.478 8.917 11.437 16.721 19.343 3#樁身軸力數(shù)

14、據(jù)表(kN)截面序號深度加載等級123456789J11.8 24003600480060007200840096001080012000J29.4 2055.93078.24086.35101.26248.67475.28677.29882.311107J314.3 1622.62613.93469.54296.35362.76547.17711.58903.110073.3J423.3 962.91855.72553.73136.14132.95232.56307.47422.98280.5J530.1 760.51482.32150.225613425.34410.35466.16501

15、.97157.8J636.5 645.31122.81733.52071.32890.83856.24795.35756.76108.3J739.0 598.51000.21567.81875.92662.83573.14490.75421.95683.6J845.7 282.1446.3816.51095.61743.72539.83278.54052.94269.9J951.7 193.4330.2595.3862.91390.62133.727483322.93520.5J1057.2 88.5146.1302.9511.2965.81496.91996.32449.32611.4J11

16、7026.742.980.3120.3242.7396.8445.2541.6594.1J1273.815.223.438.155.680.3118.3150.8215.5231.7J1377.55.77.98.910.214.317.126.937.948.3J1479.84.14.55.27.1910.112.414.619.43#樁身側壁摩阻力數(shù)據(jù)表(kPa)截面序號深度范圍加載等級123456789J1-J21.8-9.418.015 27.318 37.365 47.055 49.809 48.417 48.312 48.045 46.752 J2-J39.4-14.335.185

17、37.702 50.085 65.359 71.936 75.363 78.416 79.513 83.938 J3-J414.3-23.329.165 33.520 40.487 51.292 54.369 58.118 62.075 65.439 79.259 J4-J523.3-30.111.843 21.849 23.610 33.651 41.404 48.109 49.227 53.890 65.692 J5-J630.1-36.57.162 22.350 25.906 30.445 33.230 34.448 41.704 46.329 65.247 J6-J736.5-39.0

18、7.448 19.512 26.372 31.099 36.287 45.057 48.479 53.285 67.593 J7-J839.0-45.718.790 32.894 44.617 46.339 54.582 61.364 71.988 81.300 83.954 J8-J945.7-51.75.882 7.699 14.669 15.431 23.416 26.930 35.180 48.410 49.696 J9-J1051.7-57.57.196 12.629 20.059 24.127 29.142 43.685 51.568 59.930 62.365 J10-J1157

19、.5-70.01.967 3.285 7.086 12.443 23.017 35.017 49.373 60.724 64.213 J11-J1270.0-73.61.271 2.155 4.664 7.151 17.949 30.781 32.538 36.042 40.054 J12-J1373.6-77.50.969 1.581 2.979 4.632 6.733 10.325 12.641 18.119 18.711 J13-J1477.5-79.80.277 0.588 0.640 0.536 0.917 1.211 2.508 4.031 5.000 4#樁身軸力數(shù)據(jù)表(kN)截

20、面序號深度加載等級123456789J11.8 24003600480060007200840096001080012000J29.4 2038.93097.34151.95143.26317.27518.38720.89923.211137.5J314.3 1571.42552.73445.24256.85419.76598.57763.48953.810100.2J423.3 895.61808.12521.43158.34162.75283.76378.97511.68378.7J530.1 702.71492.32108.62521.43453.14473.25513.86611.37

21、201.7J636.5 595.11195.71741.52040.22920.53867.84828.35798.36239.8J739.0 517.21025.81531.21821.72685.33596.14519.15413.95793.8J845.7 233.2402.9819.51051.61776.32587.53297.44015.74327.6J951.7 157.5289.3620.7802.714282168.22801.93381.43617.8J1057.2 65.2135.8321.3467.3912.51515.72011.82498.22685.3J11702

22、0.232.745.275.5212.7402.3468.4567.8623.1J1273.810.917.531.542.770.9133.7186.1221.7253.8J1377.54.156.88.315.119.830.747.363.2J1479.82.83.545.29.510.613.517.822.84#樁身側壁摩阻力數(shù)據(jù)表(kPa)截面序號深度范圍加載等級123456789J1-J21.8-9.418.905 26.318 33.930 44.857 46.218 46.160 46.029 45.904 45.155 J2-J39.4-14.337.962 44.222

23、57.385 71.977 72.878 74.689 77.742 78.717 84.230 J3-J414.3-23.329.877 32.919 40.841 48.564 55.572 58.127 61.208 63.759 76.107 J4-J523.3-30.111.287 18.478 24.154 37.267 41.521 47.425 50.619 52.679 68.870 J5-J630.1-36.56.689 18.440 22.823 29.916 33.112 37.638 42.617 50.544 59.801 J6-J736.5-39.012.398

24、27.040 33.470 34.775 37.433 43.242 49.211 61.179 70.983 J7-J839.0-45.716.866 36.992 42.265 45.733 53.982 59.897 72.552 83.034 87.072 J8-J945.7-51.75.020 7.533 13.183 16.506 23.097 27.806 32.859 42.063 47.070 J9-J1051.7-57.56.332 10.530 20.539 23.009 35.364 44.762 54.202 60.589 63.971 J10-J1157.5-70.

25、01.432 3.282 8.789 12.471 22.275 35.441 49.128 61.447 65.642 J11-J1270.0-73.61.028 1.680 1.514 3.625 15.672 29.687 31.201 38.252 40.817 J12-J1373.6-77.50.694 1.275 2.520 3.510 5.693 11.620 15.854 17.793 19.445 J13-J1477.5-79.80.225 0.259 0.484 0.536 0.969 1.592 2.976 5.103 6.989 6#樁身軸力數(shù)據(jù)表(kN)截面序號深度加

26、載等級123456789J11.8 24003600480060007200840096001080012000J29.4 1993.73027.93968.15083.66225.27483.18687.39902.111103J314.3 1576.42509.43196.34271.65348.86590.47755.78971.410200.4J423.3 986.21811.32183.23079.34109.45251.26353.27501.78652.3J530.1 762.51359.71683.72473.23492.34422.35451.36586.17856.3J63

27、6.5 643.41059.31350.32053.23066.23980.34951.76050.37222.1J739.0 584.3939.81205.21857.62853.13753.24682.15755.86883.6J845.7 433.7695.7896.31392.22321.33113.33859.24733.25758.2J951.7 296.2486.6623.91063.31935.32635.23371.64202.35125.3J1057.2 213.7352.1462.5852.81453.52118.62831.73575.54338.6J1163.5101

28、.9180.5248.7452.9859.11428.32079.72727.73387.5J126759.793.1133.8286.6595.31036.71596.52198.22789.36#樁身側壁摩阻力數(shù)據(jù)表(kPa)截面序號深度范圍加載等級123456789J1-J21.8-9.421.271 29.951 43.553 47.977 51.034 48.003 47.783 47.008 46.961 J2-J39.4-14.333.885 42.103 62.671 65.936 71.165 72.489 75.647 75.574 73.292 J3-J414.3-23.

29、326.093 30.863 44.789 52.711 54.794 59.206 62.004 64.975 68.441 J4-J523.3-30.113.089 26.424 29.227 35.465 36.108 48.501 52.773 53.574 46.576 J5-J630.1-36.57.404 18.676 20.727 26.111 26.491 27.479 31.060 33.311 39.428 J6-J736.5-39.09.406 19.019 23.093 31.131 33.916 36.144 42.908 46.871 53.874 J7-J839

30、.0-45.78.944 14.496 18.344 27.638 31.582 38.001 48.869 60.728 66.833 J8-J945.7-51.79.118 13.866 18.064 21.811 25.597 31.705 32.335 35.206 41.970 J9-J1051.7-57.55.660 9.227 11.072 14.441 33.052 35.439 37.038 42.999 53.969 J10-J1157.5-63.57.414 11.380 14.178 26.519 39.417 45.777 49.869 56.221 63.072 J

31、11-J1263.5-67.04.797 9.936 13.062 18.905 29.989 44.518 54.931 60.195 68.005 7#樁身軸力數(shù)據(jù)表(kN)截面序號深度加載等級123456789J11.8 24003600480060007200840096001080012000J29.4 2021.33095.34020.35110.56285.77508.68757.69987.511201.5J314.3 1598.72482.33214.84242.85401.86611.57830.49051.410284.9J423.3 956.91790.22160.23

32、101.34232.75283.76437.27548.58789.6J530.1 718.71381.21668.22496.83538.74401.85485.16611.37899.4J636.5 603.81077.51321.52085.33097.33952.74952.96023.57300.6J739.0 555.8991.31198.51895.32891.23725.94695.35711.86943.8J845.7 411.9718.9913.81432.82368.53094.53915.84912.85861.5J951.7 305.7483.8669.31125.9

33、1958.22650.33425.84315.95159.4J1057.2 197.2332.8500.2888.11502.92085.92831.73618.64285.3J1163.598.7171.2263.7478.9897.51403.72051.82700.83205.8J126750.999.2155.3301.2620.71015.81622.82205.72638.77#樁身側壁摩阻力數(shù)據(jù)表(kPa)截面序號深度范圍加載等級123456789J1-J21.8-9.419.826 26.423 40.820 46.569 47.867 46.668 44.103 42.537

34、 41.804 J2-J39.4-14.334.316 49.777 65.408 70.459 71.774 72.846 75.290 76.013 74.429 J3-J414.3-23.328.374 30.598 46.624 50.465 51.686 58.702 61.593 66.443 66.107 J4-J523.3-30.113.938 23.932 28.788 35.371 40.608 51.602 55.710 54.838 52.088 J5-J630.1-36.57.143 18.881 21.554 25.583 27.442 27.920 33.087

35、36.543 37.227 J6-J736.5-39.07.639 13.719 19.576 30.239 32.802 36.096 40.998 49.609 56.786 J7-J839.0-45.78.546 16.177 16.907 27.466 31.041 37.496 46.292 47.450 64.274 J8-J945.7-51.77.043 15.591 16.214 20.352 27.209 29.457 32.494 39.583 46.559 J9-J1051.7-57.57.443 10.359 11.600 16.313 31.234 38.719 40

36、.756 47.836 59.964 J10-J1157.5-63.56.532 10.716 15.683 27.136 40.147 45.240 51.719 60.863 71.587 J11-J1263.5-67.05.434 8.185 12.323 20.201 31.467 44.097 48.770 56.284 64.469 8#樁身軸力數(shù)據(jù)表(kN)截面序號深度加載等級123456789J11.8 24003600480060007200840096001080012000J29.4 2007.93052.84011.55173.56305.27538.68772.999

37、95.711215.6J314.3 1558.32453.73195.64305.85406.56602.47852.29078.510314.3J423.3 945.81737.52178.23191.34256.35305.16456.87572.88862.8J530.1 692.71346.31635.92511.33502.64424.55511.66638.27934.6J636.5 553.81115.61352.42098.63076.53931.54978.66048.37322.5J739.0 511.81021.81223.71938.72900.63714.34729.

38、35768.77031.3J845.7 394.6795.3924.81454.22345.33065.73940.24900.35934.9J951.7 305.3593.8685.31148.51972.82623.73405.44294.95224.7J1057.2 207.2388.3455.6805.11522.42112.32814.23602.74381.2J1163.5105.7201.3255.9476.3914.51442.72032.82743.73395.5J126763.2108.2147.3325.6634.91067.61611.32238.42827.38#樁身

39、側壁摩阻力數(shù)據(jù)表(kPa)截面序號深度范圍加載等級123456789J1-J21.8-9.420.528 28.648 41.281 43.270 46.846 45.097 43.302 42.108 41.066 J2-J39.4-14.336.508 48.648 66.252 70.459 72.976 76.021 74.762 74.478 73.187 J3-J414.3-23.327.078 31.663 44.979 49.272 50.850 57.353 61.690 66.567 64.170 J4-J523.3-30.114.810 22.890 31.732 39.

40、789 44.101 51.526 55.306 54.686 54.312 J5-J630.1-36.58.635 14.343 17.625 25.658 26.491 30.650 33.137 36.674 38.054 J6-J736.5-39.06.685 14.929 20.483 25.449 27.995 34.568 39.677 44.500 46.346 J7-J839.0-45.76.960 13.451 17.751 28.773 32.977 38.518 46.862 51.571 65.111 J8-J945.7-51.75.922 13.362 15.882

41、 20.272 24.702 29.311 35.465 40.147 47.097 J9-J1051.7-57.56.730 14.098 15.758 23.558 30.898 35.083 40.557 47.486 57.865 J10-J1157.5-63.56.731 12.401 13.243 21.804 40.313 44.404 51.818 56.964 65.366 J11-J1263.5-67.04.831 10.584 12.346 17.132 31.786 42.642 47.917 57.444 64.594 9#樁身軸力數(shù)據(jù)表(kN)截面序號深度加載等級1

42、23456789J11.824003600480060007200840096001080012000J29.41988.53111.74120.15092.96217.27436.48640.89855.911058J314.31485.62485.93449.34295.65332.86488.67661.78890.210089.4J423.3912.31682.32597.33130.34111.65201.26298.37511.58652.3J530.1702.51285.32152.32563.23456.74482.35481.36699.47846.3J636.5503.48

43、89.31610.31997.32852.33828.34781.76000.27152.1J739.0424.3729.61405.21690.72536.53501.24422.15635.76733.6J845.7263.7415.7786.31002.51721.32583.33309.24453.45358.2J951.7146.2226.3403.6563.51105.31927.22531.63652.64425.7J1057.272.1112.5192.6319.8776.71498.61956.72995.63488.69#樁身側壁摩阻力數(shù)據(jù)表(kPa)截面序號深度范圍加載等級123456789J1-J21.8-9.421.544 25.564 35.595 47.490 51.453 50.448 50.218 49.427 49.317 J2-J39.4-14.340.836 50.816 54.470 64.742 71.815 76.963 79.504 78.416 78.652 J3-J414.3-23