桩身应力测试报告

1、第一章工程概况一、工程概述工程名称工程地点委托单位建设单位勘察单位设计单位基桩施工单位监理单位检测目的测试桩身轴力与桩侧摩阻力检测依据规范JGJ106-2003结构类型男力层数46、32和30层桩型钻孔灌注桩桩径（mm）800设计桩长57.0m、67.0m和80.0m桩端持力层粉质粘土、细砂试桩总数14棵施工日期2008.1.312.10检测桩数9棵检测日期2010.3.33.26硅强度等级C35抽测类型部分检测单桩竖向抗压拔承载力特征值6000kN要求最大加载值12000kN检测方法静载荷慢速维持荷载法过程中测量钢筋应力计备注检测现场温度、湿度满足检测要求，无强振动、强磁场等干扰；其中8#1

2、1搬46层，13#14破32层，12#楼30层。二、工程地质条件（工程地质柱状图）根据*院提供的岩土工程勘察报告，该场地工程地质条件如下:三、检测桩位示意图四、钢筋应力计在桩身埋设位置示意图1Q1Q1R1d1.Q94LrQJLIi|'1-1l.C-9.4一14311-143-23.3301114.31EJ,-J飞nih-JU.11JU.J，1JO.J1qqn1j9_0ji«7_4。745丁F1771Irn，fi517yl7tJ1_/nJiar=rS三，工$Q:-63.5>/.u1!1JJ-70.0-73.6775二57.0-9.8钢筋应力计在各试桩中位置示意图厂一、钢筋

3、应力计'钢筋应力计布置截面示意图钢筋应力计埋设位置表序号检测面编R80m桩埋设深度67m桩埋设深度57m桩埋设深度备注1J11.81.81.8为标定断面2J29.49.49.4各深度均为桩顶面往下计算3J314.314.314.34J423.323.323.35J530.130.130.16J636.536.536.57J73939398J845.745.745.79J951.751.751.710J1057.557.55757m桩桩端压力盒11J117063.512J1273.66767m桩桩端压力盒13J1377.514J1479.880m桩桩端压力盒检测桩号1#、3#、4#6#、

4、7#、8#9#、10#、11#第二章桩身内力测试一、检测目的本次检测目的是测定在各级荷载作用下桩身不同位置的轴力和桩侧摩阻力的分布情况。二、测试设备及钢筋测力计的埋设1、每桩钢筋应力计设置在各土层交界面处，每一个截面设2只钢筋测力计(基本呈180°对称布置)，各钢筋应力计埋设截面的平、剖面图如前图；2、JTM-V1000振弦式钢筋应力计采用焊接法固定在钢筋笼主筋上，并与桩身纵轴线平行；3、连接在应力计的电缆线用柔性材料保护，绑扎在钢筋笼内侧并引至地面；4、所有应力计均用明显标记编号；5、仪器设备：检测仪器设备采用JTM-V1000振弦式钢筋应力计、JTM-V10B型频率读数仪、集线箱

5、等组成。三、测试原理1、假定：同一截面钢筋与混凝土的变形协调；桩顶下硅弹性模量相同；位于桩顶面以下1.8m处的J1截面所受轴力与静载荷试验的加载量相同；2、桩身范围内硅弹性模量Ecij的确定：将J1截面作为标定截面(i=1),量测该截面钢筋应力计在包括预压的各级荷载作用下频率变化值，用此推算各载荷等级下钢筋应变£s1j,由于假定硅与钢筋协同受力，不出现裂缝，故硅应变&c1j=£slj,由此可以算出各载荷等级下桩身硅的弹性模量Ecij。利用钢筋应变£slj与桩身硅的弹性模量Ecij的两组数据可以拟合出关于两者之间的相关关系，根据其余各截面在各载荷等级下钢筋应

6、变£sij,再通过其相关关系可以得到各截面在各载荷等级下的Ecij；3、某一截面桩身轴力Pzj计算公式为：Pzj=EcjAcjcjESjAsj*；Sj=(Ecj*AcjEsj*ASj)*Sj-式中：Ecj、Esj硅弹性模量、钢筋弹性模量Es取2.0X108(kPa)Acj、Asj一同一截面处硅面积、钢筋总面积。£cj、&sj一同一截面处於与钢筋的应变4、钢筋应力计受力的计算公式：2_2'PSij=k*(Fij-Fi0)=Es；Sij*ASi(2)'Sij=嘘S应)(3)式中：PSij第i量测截面处在j级荷载下应力计所受轴向力(kN)Fj第i量测截面处

7、在j级荷载下应力计的实测频率值(Hz)Fi0-i截面处钢筋应力计的初始频率值(Hz)K应力计标定系数A，多i量测截面应力计面积(cm2)5、第i量测截面处在第j级荷载下的桩身轴力：耳二Eq1§EsAs-Sij6、桩侧摩阻力计算fij：Pj-Re(i=1，14)(4)式中:fj-i截面至i+1截面之间在第j级荷载量下的桩侧摩阻力（kPa）Piji截面在j级荷载量下的轴力（kN）Ai-i截面至i+1截面之间的桩侧面积（m2）四、测试步骤1、将弦式钢筋应力计按产品使用要求预埋在试桩桩身指定位置；2、弦式钢筋应力计宜放在两种不同性质土层的界面处，以测量桩在不同土层中的分层摩阻力。在地面处（或

8、以上）应设置一个测量断面作为钢筋应力计传感器标定断面。钢筋应力计埋设断面距桩顶和桩底的距离不宜小于1倍桩径。在同一断面处对称设置2个钢筋应力计。钢筋计应按主筋直径大小选择。仪器的可测频率范围应大于桩在最大加载时的频率的1.2倍;3、使用前应对钢筋计逐个标定，得出压力（拉力）与频率之间的关系。带有接长杆弦式钢筋计可焊接在主筋上；弦式钢筋计通过与之匹配的频率仪进行测量，频率仪的分辨力应优于或等于1Hz;4、在载荷试验时进行桩身内力测试。五、实测曲线桩身轴力/kN侧摩阻力/kPa9酋0012000720020S3。50J/1/./w/毗/407080-240036004800-000T-720084

9、009500-*-10800-*-12000307030203C506070809010020501#桩桩身轴力分布图1#桩桩身侧摩阻力分布图桩身轴力/kN侧摩阻力/kPa0102030405060706090100024004800720096001200010m305。6070SO2400720034C0-+-3600-*-10500f-120CO480060CO桩身轴力/kN02400480072CO360012000ooooo345bEMfMhl!/IfJ./"/bzF-24003500J4300-60QC-*-7200一8400i-9500-*-1080012000桩身轴力

10、/kN1I10m40恻摩阻力/kPa1020304050SO708。90130LOU4set7080-2400-3600-*-48006000-*-7200-aS400rA9600-*-10800-#-120004#®桩身侧摩阻力分布图10203040506070a/Mfrn2048007200960012000侧摩阻力/kPaa10203040506070BO90100W”/3/W/ZZIUW3V"-24003600-d4000_*一£000T-7200一十34009600-*-1DSD0一*T20。口104070:出丁TP出-2400-36004800一一60

11、00*一72006400-4-960口-<-10800-*-12000桩身轴力/kN侧摩阻力4%024004SOO720096001200001020304050£0706090100o1020S30忘M4。506070卜*木+奖j/m必/mum-lUl/l/IJ史/MW跖4/IIII-24003£00-*-JI800-60007203-a8400-*-9603-*-10300-*-12000桩身轴力/kN0240048007200960012000010203040505070Wt叫上出）+*修240。3600一*-4S0D-*-SOOO1*-7200840。-4-

12、96。口一一10600k*-120007#®桩身侧摩阻力分布图侧摩阻力/kPa6070SO30100U1020g30燃M4050SO蛛#4（奖*W/W/龈/-2400-360口-*-4800-6000*-7200S4009600一10800-*-120000102030401020丸405050E忘W240036004&00-*-皈。T72008400i9百口。-*-icsao-*-12000桩身轴力/kN/2400480072009印。120001/监/岸IU1U4800-60007200*-8400一一9600-*-10800-*-120009#桩桩身轴力分布图桩身轴力/

13、kN4800.w/Q2m36004800-6000-fr-72008400一4一960口10800-*-12000侧摩阻力/kPa0102030405060703090100IP|'II-ll"!"!"I"I"om12000O一一2400-3600一»4800-A弥）0-*一7200840096cle-*-loaoo9#tt桩身侧摩阻力分布图恻摩阻力/kPa010203040oCHRDE。寸国s50EC708090100J-240D3600一4SOO一一6000-*一了2008400-+-9600-*-10800-*-1200

14、0弼0。桩身轴力/kN0制口口4S0C7200，/侧摩阻力/kPa10203040506070SOSO100-2400-3600-J4S0060007200一8400-49600-*-10300吁1200011#桩桩身轴力分布图11#桩桩身侧摩阻力分布图六、检测成果汇总1#桩身轴力数据表(kN)截回序号深度加载等级123456789J11.824003600480060007200840096001080012000J29.42017.33052.84078.15078.96225.27457.38652.89859.111060J314.31593.62593.73476.34271.653

15、48.86523.67695.78891.210050.4J423.3912.61831.32547.33109.34111.65201.26298.37401.58252.3J530.1732.31469.32153.72533.23401.74392.35451.36505.47106.3J636.5623.41109.31710.32053.22872.33837.34781.75750.26122.1J739.0584.3979.61555.21857.72646.53551.24482.15405.75683.6J845.7263.7415.7796.31072.51721.3250

16、3.33259.24033.44258.2J951.7186.2306.3573.6833.51375.32115.22721.63302.63505.3J1057.273.7122.1292.6495.8943.71478.61981.72425.92592.6J117018.930.548.672.4229.1378.3429.7527.5587.5J1273.811.419.833.951.275.6102.7136.2198.1229.3J1377.54.55.37.69.712.115.324.134.239.7J1479.83.84.14.45.77.89.411.613.815.

17、8截回序号加载等级夕巴田123456789J1-J21.8-9.420.03628.64837.79448.22351.03449.35449.58949.25949.212J2-J39.4-14.334.40537.28048.86765.55471.16575.81877.71878.59581.981J3-J414.3-23.330.10733.70541.07151.38554.69658.46361.77965.85979.493J4-J523.3-30.110.55021.18223.03133.70941.53847.33149.56052.43367.056J5-J630.1-

18、36.56.77022.38127.56629.84232.91334.50441.62946.95161.188J6-J736.5-39.06.22320.64224.68531.11535.93745.53447.68354.82969.789J7-J839.0-45.719.03933.48845.06846.63054.94462.23172.62381.49684.649J8-J945.7-51.75.1397.25514.76815.84922.94525.73735.65148.46349.928J9-J1051.7-57.57.71812.63619.27723.16729.6

19、0843.67250.75860.14362.612J10-J1157.5-70.01.7442.9167.76713.47722.74635.02449.40260.42863.824J11-J1270.0-73.60.8291.1831.6252.34316.96530.46032.43936.40739.590J12-J1373.6-77.50.7041.4792.6834.2346.4788.91711.43716.72119.3433#tt身轴力数据表(kN)截回序号深度加载等级123456789J11.824003600480060007200840096001080012000J

20、29.42055.93078.24086.35101.26248.67475.28677.29882.311107J314.31622.62613.93469.54296.35362.76547.17711.58903.110073.3J423.3962.91855.72553.73136.14132.95232.56307.47422.98280.5J530.1760.51482.32150.225613425.34410.35466.16501.97157.8J636.5645.31122.81733.52071.32890.83856.24795.35756.76108.3J739.05

21、98.51000.21567.81875.92662.83573.14490.75421.95683.6J845.7282.1446.3816.51095.61743.72539.83278.54052.94269.9J951.7193.4330.2595.3862.91390.62133.727483322.93520.5J1057.288.5146.1302.9511.2965.81496.91996.32449.32611.4J117026.742.980.3120.3242.7396.8445.2541.6594.1J1273.815.223.438.155.680.3118.3150

22、.8215.5231.7J1377.55.77.98.910.214.317.126.937.948.3J1479.84.14.55.27.1910.112.414.619.4截回序号加载等级夕巴田123456789J1-J21.8-9.418.01527.31837.36547.05549.80948.41748.31248.04546.752J2-J39.4-14.335.18537.70250.08565.35971.93675.36378.41679.51383.938J3-J414.3-23.329.16533.52040.48751.29254.36958.11862.07565.

23、43979.259J4-J523.3-30.111.84321.84923.61033.65141.40448.10949.22753.89065.692J5-J630.1-36.57.16222.35025.90630.44533.23034.44841.70446.32965.247J6-J736.5-39.07.44819.51226.37231.09936.28745.05748.47953.28567.593J7-J839.0-45.718.79032.89444.61746.33954.58261.36471.98881.30083.954J8-J945.7-51.75.8827.

24、69914.66915.43123.41626.93035.18048.41049.696J9-J1051.7-57.57.19612.62920.05924.12729.14243.68551.56859.93062.365J10-J1157.5-70.01.9673.2857.08612.44323.01735.01749.37360.72464.213J11-J1270.0-73.61.2712.1554.6647.15117.94930.78132.53836.04240.054J12-J1373.6-77.50.9691.5812.9794.6326.73310.32512.6411

25、8.11918.711J13-J1477.5-79.80.2770.5880.6400.5360.9171.2112.5084.0315.0004#tt身轴力数据表(kN)截回序号深度加载等级123456789J11.824003600480060007200840096001080012000J29.42038.93097.34151.95143.26317.27518.38720.89923.211137.5J314.31571.42552.73445.24256.85419.76598.57763.48953.810100.2J423.3895.61808.12521.43158.341

26、62.75283.76378.97511.68378.7J530.1702.71492.32108.62521.43453.14473.25513.86611.37201.7J636.5595.11195.71741.52040.22920.53867.84828.35798.36239.8J739.0517.21025.81531.21821.72685.33596.14519.15413.95793.8J845.7233.2402.9819.51051.61776.32587.53297.44015.74327.6J951.7157.5289.3620.7802.714282168.228

27、01.93381.43617.8J1057.265.2135.8321.3467.3912.51515.72011.82498.22685.3J117020.232.745.275.5212.7402.3468.4567.8623.1J1273.810.917.531.542.770.9133.7186.1221.7253.8J1377.54.156.88.315.119.830.747.363.2J1479.82.83.545.29.510.613.517.822.8截回序号加载等级夕巴田123456789J1-J21.8-9.418.90526.31833.93044.85746.2184

28、6.16046.02945.90445.155J2-J39.4-14.337.96244.22257.38571.97772.87874.68977.74278.71784.230J3-J414.3-23.329.87732.91940.84148.56455.57258.12761.20863.75976.107J4-J523.3-30.111.28718.47824.15437.26741.52147.42550.61952.67968.870J5-J630.1-36.56.68918.44022.82329.91633.11237.63842.61750.54459.801J6-J736

29、.5-39.012.39827.04033.47034.77537.43343.24249.21161.17970.983J7-J839.0-45.716.86636.99242.26545.73353.98259.89772.55283.03487.072J8-J945.7-51.75.0207.53313.18316.50623.09727.80632.85942.06347.070J9-J1051.7-57.56.33210.53020.53923.00935.36444.76254.20260.58963.971J10-J1157.5-70.01.4323.2828.78912.471

30、22.27535.44149.12861.44765.642J11-J1270.0-73.61.0281.6801.5143.62515.67229.68731.20138.25240.817J12-J1373.6-77.50.6941.2752.5203.5105.69311.62015.85417.79319.445J13-J1477.5-79.80.2250.2590.4840.5360.9691.5922.9765.1036.9896#tt身轴力数据表(kN)截回序号深度加载等级123456789J11.824003600480060007200840096001080012000J2

31、9.41993.73027.93968.15083.66225.27483.18687.39902.111103J314.31576.42509.43196.34271.65348.86590.47755.78971.410200.4J423.3986.21811.32183.23079.34109.45251.26353.27501.78652.3J530.1762.51359.71683.72473.23492.34422.35451.36586.17856.3J636.5643.41059.31350.32053.23066.23980.34951.76050.37222.1J739.0

32、584.3939.81205.21857.62853.13753.24682.15755.86883.6J845.7433.7695.7896.31392.22321.33113.33859.24733.25758.2J951.7296.2486.6623.91063.31935.32635.23371.64202.35125.3J1057.2213.7352.1462.5852.81453.52118.62831.73575.54338.6J1163.5101.9180.5248.7452.9859.11428.32079.72727.73387.5J126759.793.1133.8286

33、.6595.31036.71596.52198.22789.3截回序号加载等级夕巴田123456789J1-J21.8-9.421.27129.95143.55347.97751.03448.00347.78347.00846.961J2-J39.4-14.333.88542.10362.67165.93671.16572.48975.64775.57473.292J3-J414.3-23.326.09330.86344.78952.71154.79459.20662.00464.97568.441J4-J523.3-30.113.08926.42429.22735.46536.10848.5

34、0152.77353.57446.576J5-J630.1-36.57.40418.67620.72726.11126.49127.47931.06033.31139.428J6-J736.5-39.09.40619.01923.09331.13133.91636.14442.90846.87153.874J7-J839.0-45.78.94414.49618.34427.63831.58238.00148.86960.72866.833J8-J945.7-51.79.11813.86618.06421.81125.59731.70532.33535.20641.970J9-J1051.7-5

35、7.55.6609.22711.07214.44133.05235.43937.03842.99953.969J10-J1157.5-63.57.41411.38014.17826.51939.41745.77749.86956.22163.072J11-J1263.5-67.04.7979.93613.06218.90529.98944.51854.93160.19568.0057#tt身轴力数据表(kN)截回序号深度加载等级123456789J11.824003600480060007200840096001080012000J29.42021.33095.34020.35110.5628

36、5.77508.68757.69987.511201.5J314.31598.72482.33214.84242.85401.86611.57830.49051.410284.9J423.3956.91790.22160.23101.34232.75283.76437.27548.58789.6J530.1718.71381.21668.22496.83538.74401.85485.16611.37899.4J636.5603.81077.51321.52085.33097.33952.74952.96023.57300.6J739.0555.8991.31198.51895.32891.2

37、3725.94695.35711.86943.8J845.7411.9718.9913.81432.82368.53094.53915.84912.85861.5J951.7305.7483.8669.31125.91958.22650.33425.84315.95159.4J1057.2197.2332.8500.2888.11502.92085.92831.73618.64285.3J1163.598.7171.2263.7478.9897.51403.72051.82700.83205.8J126750.999.2155.3301.2620.71015.81622.82205.72638

38、.7截回序号加载等级深度范围123456789J1-J21.8-9.419.82626.42340.82046.56947.86746.66844.10342.53741.804J2-J39.4-14.334.31649.77765.40870.45971.77472.84675.29076.01374.429J3-J414.3-23.328.37430.59846.62450.46551.68658.70261.59366.44366.107J4-J523.3-30.113.93823.93228.78835.37140.60851.60255.71054.83852.088J5-J630.

39、1-36.57.14318.88121.55425.58327.44227.92033.08736.54337.227J6-J736.5-39.07.63913.71919.57630.23932.80236.09640.99849.60956.786J7-J839.0-45.78.54616.17716.90727.46631.04137.49646.29247.45064.274J8-J945.7-51.77.04315.59116.21420.35227.20929.45732.49439.58346.559J9-J1051.7-57.57.44310.35911.60016.31331

40、.23438.71940.75647.83659.964J10-J1157.5-63.56.53210.71615.68327.13640.14745.24051.71960.86371.587J11-J1263.5-67.05.4348.18512.32320.20131.46744.09748.77056.28464.4698#tt身轴力数据表(kN)截回序号深度加载等级123456789J11.824003600480060007200840096001080012000J29.42007.93052.84011.55173.56305.27538.68772.99995.711215.

41、6J314.31558.32453.73195.64305.85406.56602.47852.29078.510314.3J423.3945.81737.52178.23191.34256.35305.16456.87572.88862.8J530.1692.71346.31635.92511.33502.64424.55511.66638.27934.6J636.5553.81115.61352.42098.63076.53931.54978.66048.37322.5J739.0511.81021.81223.71938.72900.63714.34729.35768.77031.3J8

42、45.7394.6795.3924.81454.22345.33065.73940.24900.35934.9J951.7305.3593.8685.31148.51972.82623.73405.44294.95224.7J1057.2207.2388.3455.6805.11522.42112.32814.23602.74381.2J1163.5105.7201.3255.9476.3914.51442.72032.82743.73395.5J126763.2108.2147.3325.6634.91067.61611.32238.42827.3截回序号加载等级深度范围123456789J

43、1-J21.8-9.420.52828.64841.28143.27046.84645.09743.30242.10841.066J2-J39.4-14.336.50848.64866.25270.45972.97676.02174.76274.47873.187J3-J414.3-23.327.07831.66344.97949.27250.85057.35361.69066.56764.170J4-J523.3-30.114.81022.89031.73239.78944.10151.52655.30654.68654.312J5-J630.1-36.58.63514.34317.62525.6582