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 JGJ106-2003结构类型剪力墙层数46、32 和 30 层桩型钻孔灌注桩桩径mm800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2021.1.31 2.10检测桩数9棵检测日期2021.3.3 3.26砼强度等级C35抽测类型局部检测单桩竖向抗压拔承载力特征值6000 kN要求最大加载值12000 kN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

2、干扰；其中 8#11#楼 46 层，13#14#楼 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9.4一 14.3一一23.3一-30.1一逊1-39.045,7|一-51 7-57.5|_ 一 70.0i 73.6177.59,8、一 1,89.4+14.3一23.3一一 30.136 5P-39.0_-457一一51.7I- 57.5一-63.567023330.136.539.057 0钢筋应力计在各试桩中位置示意图 钢筋应力计埋设位置表二一.序号检测面 编号/80

3、m桩埋设深度67m 桩57m 桩3_埋设深度埋设深度备注1J1魏筋应力计布置曙就面示8意图为标定断面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#、7#、8#9#、10#、11#第二章桩身力测试一、检测目的

4、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、测试设备与钢筋测力计的埋设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 筋测力计根本呈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、集线箱等组成。三、测试原理1、假定：同一截面钢筋与混凝土的

5、变形协调；桩顶下砼弹性模量 一样；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2、桩身围砼弹性模量Ecj确实定：将J1截面作为标定截面i=1，值，用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此推算各载荷等级下钢筋应变£ slj，由于假定砼与钢筋协同受力，不出现裂缝，故砼应变 £ c1j= £ slj，由此可以算出各载荷等级下桩身砼的 弹性模量Ecij。利用钢筋应变£ slj与桩身砼的弹性模量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 下钢筋应变£ sij ,再通过其相关关系可以得到

6、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:PzjEc j ? Ac j ? c j Esj ? Asj ? s j (Ec j ? Ac j Esj ? As j ) ? s j式中：Ecj、Eq砼弹性模量、钢筋弹性模量 Es取2.0 x 108(kPa)Acj、Asj同一截面处砼面积、钢筋总面积。£ cj、£ sj 同一截面处砼与钢筋的应变4、钢筋应力计受力的计算公式：2 2 'Psij k?(FijFi2)Es? Sij ? AsiSij式中：Psij 第i量测截面处在j级荷载下应力计所受轴向力 kNFj第i量测截面处在j级荷载下应力

7、计的实测频率值(Hz)Fi0i截面处钢筋应力计的初始频率值 HzK应力计标定系数Asi'第 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:PijECij ? ACi ? Sij E SASi ? Sij(i 1,14)fRj Ri ij6、桩侧摩阻力计算fij:式中：fij i截面至i+1截面之间在第j级荷载量下的桩侧摩阻力 kPaRij i截面在j级荷载量下的轴力kNAi 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

8、摩阻力。在地面处或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 仪进展测量，频率仪的分辨力应优于或等于 1Hz4、在载荷试验时进展桩身力测试。五、实测曲线桩身轴力/0240043007200900 12DCID侧摩阻力/kPa01020 30 4050 SO 7080 9C 100Q

9、o o _u o o o1 2 3 4 3 c 7 2鰹慝/ /?/ -/«/ 一 M/"_ml/-2400 一"丸00 - 4300£000 -t- 7200 一尸 84001 刃00 -*-)0800 -2 12000203040刃 和 冗aclu'MTffi卅-24 0C*-300 -4800-*-6000-*-7200 一84DC*-10800fr-120001#桩桩身轴力分布图1#桩桩身侧摩阻力分布图桩身轴t/kN1020£30M4050607C02400 48OD 7200 M0C 12000 曲"【出！“/k&g

10、t;-24CD -*350043000007200 k 84C0 -4-95C0 -*-10600 -*-12000inso707 /2400 葩00 -斗 30D&XD7200 L甜如96001090012000侧摩阻力/kF耳0102030 4050 60 70 S3 90 100 *r V M'AllII3#桩桩身轴力分布图3#桩桩身侧摩阻力分布图桩身铀力/kN0 湖 00 4SOO 72CD 9500 120C0侧摩阻力应01020 30 4D 50 60 70 aO 90102C506090SO-*-10800-O-120C0-2400-'3600 一4S00

11、 sooc-*-7200 -t- 84004#桩桩身轴力分布图桩身轴力/跟J1：i)10ID304O5O6O70SO4#桩桩身侧摩阻力分布图1020E 3072CKJ12000也/W/70- 24Q0 - 3600-*- 4800- SOOO一72Q0 十 8400-1-9600-*-10SOO-'-1200030405060侧摩阻力加3105030 4050 甜 70 SO 50 10070 L8 / 20UUU 2400-3600 *-4300ano7200 40096001 i)800 120006#桩桩身轴力分布图6#桩桩身侧摩阻力分布图桩身轴力/kN2400'4600

12、72035600 12000W20E 30fitt 40JOSO70fwzUllllU班豪匸冥 £叫川/-2400-*-3600-*-4800 口 00-+- 7200i-W00一*一10SOO -V-120000 0 01)03 4 5 6侧摩阻力/W且 ID 20 30 40 SO 60 700090 100U. ULM 民U1 JUL-tUUJ丄11i 止4 + 址 A醫-2400 -3600 4600 -一 6000 -*- 7200 - S400 -+-960O -*-1800 -u-120007#桩桩身轴力分布图7#桩桩身侧摩阻力分布图桩身轴力/kN2 斗 OD4SOO

13、*7200弭 0Q 12000侧摩阻力/kP白 o o Q3 4 5lllllu 1皿/ILUUJ24E - 3600 一一 4300S00072000400 -*- 9600 -loeoo -«- L2000010W 30悝雄4C509啊21020 X 4050 60 70 S0 90 100 1 tuxi-iX-j JL * 1 JJ* 0 'U -3 4 &右 41 M- 24C0 - 3400 -*-43C0-*-60C0-*-7200 - ®400-*- 9600-*- 1QSQ08#桩桩身轴力分布图8#桩桩身侧摩阻力分布图桩身轴力/kN02400

14、 4BOO 720096C0 12000/恻摩阻力/kPa010 20 30 4050 EQ 70 SO SO 1002目 品?歸SE'Mm/MI 111n $ / yW/ w- 2400-*-3500-4800-*- 6000-t- 7200 十 54C0愿310800- 13000-*- 12000- 2400- 3600 4SOO- 000-*- 7200Y- S4003600-*- 10M9#桩桩身轴力分布图桩身轴力/'kM2400430Q T2Q0 9600 120QO/ "/ / O/F 声了扌4 y * y 単仃/ 俗/ 4庄/. /f -2400- 3

15、600*-4300- 6000*- 72003400 9500<-198001200010 / 20II II+ 瀬II9#桩桩身侧摩阻力分布图0 W 2C 20 405C 60 70 SO SO 100_1I1-fJL24CO33004900eaoo-*- 7300-0400TfiOO *一 1D600*- 12000"110#桩桩身轴力分布图10#桩桩身侧摩阻力分布图桩身轴力/kN02404007200 罪 001200011#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截面序号深度加载等级123456789J11.82400360048

16、0060007200840096001080012000J29.42021.33052.84078.15078.96225.27457.38652.89859.111060J314.31593.62593.73476.34271.65348.86523.67695.78891.210050.4J423.3912.61831.32547.33109.34111.65201.26298.37401.58252.3J530.1732.31469.32153.72533.23401.74392.35451.36505.47106.3J636.5623.41109.31710.32053.22872.3

17、3837.34781.75750.26122.1J739.0584.3979.61555.21857.72646.53551.24482.15405.75683.6J845.7263.7415.7796.31072.51721.32503.33259.24033.44258.2J951.7186.2306.3573.6833.51375.32115.22721.63302.63505.3J1057.273.7122.1292.6495.8943.71478.61981.72425.92592.6J117018.930.548.672.4229.1378.3429.7527.5587.5J127

18、3.811.419.833.951.275.6102.7136.2198.1229.3J1377.54.55.37.69.712.115.324.134.239.7J1479.83.84.14.45.77.89.411.613.815.81#桩身侧壁摩阻力数据表(kPa)截面序号深度围加载等级123456789J1-J220.03628.64837.79448.22351.03449.35449.58949.25949.212J2-J334.40537.28048.86765.55471.16575.81877.71878.59581.981J3-J430.10733.70541.07151.

19、38554.69658.46361.77965.85979.493J4-J510.55021.18223.03133.70941.53847.33149.56052.43367.056J5-J66.77022.38127.56629.84232.91334.50441.62946.95161.188J6-J76.22320.64224.68531.11535.93745.53447.68354.82969.789J7-J819.03933.48845.06846.63054.94462.23172.62381.49684.649J8-J95.1397.25514.76815.84922.945

20、25.73735.65148.46349.928J9-J107.71812.63619.27723.16729.60843.67250.75860.14362.612J10-J111.7442.9167.76713.47722.74635.02449.40260.42863.824J11-J120.8291.1831.6252.34316.96530.46032.43936.40739.590J12-J130.7041.4792.6834.2346.4788.91711.43716.72119.3433#桩身轴力数据表(kN)截面序号深度加载等级123456789J11.82400360048

21、0060007200840096001080012000J29.42055.93078.24086.35101.26248.67475.28677.29882.311107J314.31622.62613.93469.54296.35362.76547.17711.58903.110073.3J423.3962.91855.72553.73136.14132.95232.56307.47422.98280.5J530.1760.51482.32150.225613425.34410.35466.16501.97157.8J636.5645.31122.81733.52071.32890.838

22、56.24795.35756.76108.3J739.0598.51000.21567.81875.92662.83573.14490.75421.95683.6J845.7282.1446.3816.51095.61743.72539.83278.54052.94269.9J951.7193.4330.2595.3862.91390.62133.727483322.93520.5J1057.288.5146.1302.9511.2965.81496.91996.32449.32611.4J117026.742.980.3120.3242.7396.8445.2541.6594.1J1273.

23、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#桩身侧壁摩阻力数据表kPa截面序号深度围加载等级123456789J1-J218.01527.31837.36547.05549.80948.41748.31248.04546.752J2-J335.18537.70250.08565.35971.93675.36378.41679.51383.938J3-J429.16533.52040.48751.2925

24、4.36958.11862.07565.43979.259J4-J511.84321.84923.61033.65141.40448.10949.22753.89065.692J5-J67.16222.35025.90630.44533.23034.44841.70446.32965.247J6-J77.44819.51226.37231.09936.28745.05748.47953.28567.593J7-J818.79032.89444.61746.33954.58261.36471.98881.30083.954J8-J95.8827.69914.66915.43123.41626.9

25、3035.18048.41049.696J9-J107.19612.62920.05924.12729.14243.68551.56859.93062.365J10-J111.9673.2857.08612.44323.01735.01749.37360.72464.213J11-J121.2712.1554.6647.15117.94930.78132.53836.04240.054J12-J130.9691.5812.9794.6326.73310.32512.64118.11918.711J13-J140.2770.5880.6400.5360.9171.2112.5084.0315.0

26、004#桩身轴力数据表kN截面序号深度加载等级123456789J11.824003600480060007200840096001080012000J29.42038.93097.34151.95143.26317.27518.38720.89923.211137.5J314.31571.42552.73445.24256.85419.76598.57763.48953.810100.2J423.3895.61808.12521.43158.34162.75283.76378.97511.68378.7J530.1702.71492.32108.62521.43453.14473.25513

27、.86611.37201.7J636.5595.11195.71741.52040.22920.53867.84828.35798.36239.8J739.0517.21025.81531.21821.72685.33596.14519.15413.95793.8J845.7233.2402.9819.51051.61776.32587.53297.44015.74327.6J951.7157.5289.3620.7802.714282168.22801.93381.43617.8J1057.265.2135.8321.3467.3912.51515.72021.82498.22685.3J1

28、17020.232.745.275.5212.7402.3468.4567.8623.1J1273.810.917.531.542.770.9133.7186.1221.7253.8J1377.54.156.88.315.119.830.747.363.2J1479.82.83.545.29.510.613.517.822.84#桩身侧壁摩阻力数据表(kPa)截面序号深度围加载等级123456789J1-J218.90526.31833.93044.85746.21846.16046.02945.90445.155J2-J337.96244.22257.38571.97772.87874.68

29、977.74278.71784.230J3-J429.87732.91940.84148.56455.57258.12761.20863.75976.107J4-J511.28718.47824.15437.26741.52147.42550.61952.67968.870J5-J66.68918.44022.82329.91633.11237.63842.61750.54459.801J6-J712.39827.04033.47034.77537.43343.24249.21161.17970.983J7-J816.86636.99242.26545.73353.98259.89772.55

30、283.03487.072J8-J95.0207.53313.18316.50623.09727.80632.85942.06347.070J9-J106.33210.53020.53923.00935.36444.76254.20260.58963.971J10-J111.4323.2828.78912.47122.27535.44149.12861.44765.642J11-J121.0281.6801.5143.62515.67229.68731.20138.25240.817J12-J130.6941.2752.5203.5105.69311.62015.85417.79319.445

31、J13-J140.2250.2590.4840.5360.9691.5922.9765.1036.9896#桩身轴力数据表(kN)截面序号深度加载等级123456789J11.824003600480060007200840096001080012000J29.41993.73027.93968.15083.66225.27483.18687.39902.111103J314.31576.42509.43196.34271.65348.86590.47755.78971.410200.4J423.3986.21811.32183.23079.34109.45251.26353.27501.78

32、652.3J530.1762.51359.71683.72473.23492.34422.35451.36586.17856.3J636.5643.41059.31350.32053.23066.23980.34951.76050.37222.1J739.0584.3939.81205.21857.62853.13753.24682.15755.86883.6J845.7433.7695.7896.31392.22321.33113.33859.24733.25758.2J951.7296.2486.6623.91063.31935.32635.23371.64202.35125.3J1057

33、.2213.7352.1462.5852.81453.52118.62831.73575.54338.6J1163.5101.9180.5248.7452.9859.11428.32079.72727.73387.5J126759.793.1133.8286.6595.31036.71596.52198.22789.36#桩身侧壁摩阻力数据表(kPa)截面序号深度围加载等级123456789J1-J221.27129.95143.55347.97751.03448.00347.78347.00846.961J2-J333.88542.10362.67165.93671.16572.48975.

34、64775.57473.292J3-J426.09330.86344.78952.71154.79459.20662.00464.97568.441J4-J513.08926.42429.22735.46536.10848.50152.77353.57446.576J5-J67.40418.67620.72726.11126.49127.47931.06033.31139.428J6-J79.40619.01923.09331.13133.91636.14442.90846.87153.874J7-J88.94414.49618.34427.63831.58238.00148.86960.72

35、866.833J8-J99.11813.86618.06421.81125.59731.70532.33535.20641.970J9-J105.6609.22711.07214.44133.05235.43937.03842.99953.969J10-J117.41411.38014.17826.51939.41745.77749.86956.22163.072J11-J124.7979.93613.06218.90529.98944.51854.93160.19568.0057#桩身轴力数据表(kN)截面序号深度加载等级123456789J11.8240036004800600072008

36、40096001080012000J29.42021.33095.34020.35110.56285.77508.68757.69987.511201.5J314.31598.72482.33214.84242.85401.86611.57830.49051.410284.9J423.3956.91790.22160.23101.34232.75283.76437.27548.58789.6J530.1718.71381.21668.22496.83538.74401.85485.16611.37899.4J636.5603.81077.51321.52085.33097.33952.7495

37、2.96023.57300.6J739.0555.8991.31198.51895.32891.23725.94695.35711.86943.8J845.7411.9718.9913.81432.82368.53094.53915.84912.85861.5J951.7305.7483.8669.31125.91958.22650.33425.84315.95159.4J1057.2197.2332.8500.2888.11502.92085.92831.73618.64285.3J1163.598.7171.2263.7478.9897.51403.72051.82700.83205.8J

38、126750.999.2155.3301.2620.71015.81622.82205.72638.77#桩身侧壁摩阻力数据表(kPa)截面序号深度围加载等级123456789J1-J219.82626.42340.82046.56947.86746.66844.10342.53741.804J2-J334.31649.77765.40870.45971.77472.84675.29076.01374.429J3-J428.37430.59846.62450.46551.68658.70261.59366.44366.107J4-J513.93823.93228.78835.37140.608

39、51.60255.71054.83852.088J5-J67.14318.88121.55425.58327.44227.92033.08736.54337.227J6-J77.63913.71919.57630.23932.80236.09640.99849.60956.786J7-J88.54616.17716.90727.46631.04137.49646.29247.45064.274J8-J97.04315.59116.21420.35227.20929.45732.49439.58346.559J9-J107.44310.35911.60016.31331.23438.71940.

40、75647.83659.964J10-J116.53210.71615.68327.13640.14745.24051.71960.86371.587J11-J125.4348.18512.32320.20131.46744.09748.77056.28464.4698#桩身轴力数据表(kN)截面序号深度加载等级123456789J11.824003600480060007200840096001080012000J29.42007.93052.84011.55173.56305.27538.68772.99995.711215.6J314.31558.32453.73195.64305.85

41、406.56602.47852.29078.510314.3J423.3945.81737.52178.23191.34256.35305.16456.87572.88862.8J530.1692.71346.31635.92511.33502.64424.55511.66638.27934.6J636.5553.81115.61352.42098.63076.53931.54978.66048.37322.5J739.0511.81021.81223.71938.72900.63714.34729.35768.77031.3J845.7394.6795.3924.81454.22345.33

42、065.73940.24900.35934.9J951.7305.3593.8685.31148.51972.82623.73405.44294.95224.7J1057.2207.2388.3455.6805.11522.42112.32814.23602.74381.2J1163.5105.7201.3255.9476.3914.51442.72032.82743.73395.5J126763.2108.2147.3325.6634.91067.61611.32238.42827.38#桩身侧壁摩阻力数据表(kPa)截面序号深度围加载等级123456789J1-J220.52828.648

43、41.28143.27046.84645.09743.30242.10841.066J2-J336.50848.64866.25270.45972.97676.02174.76274.47873.187J3-J427.07831.66344.97949.27250.85057.35361.69066.56764.170J4-J514.81022.89031.73239.78944.10151.52655.30654.68654.312J5-J68.63514.34317.62525.65826.49130.65033.13736.67438.054J6-J76.68514.92920.48325.44927.99534.56839.67744.50046.346J7-J86.96013.45117.75128.77332.97738.51846.86251.57165.111J8-J95.92213.36215.88220.27224.70229.31135.46540.14747.097J9-J106.73014.09815.75823.55830.89835.08340.55747.48657.865J10-J116.73112.40113.24321.80440.31344.40451.81856.96465.366J11-J124