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) 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mm800設計樁長57.0m、67.0m 和 80.0m樁端持力層粉質粘土、細砂試樁總數(shù)14棵施工日期2021.1.31 2.10檢測樁數(shù)9棵檢測日期2021.3.3 3.26砼強度等級C35抽測類型局部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

2、干擾；其中 8#11#樓 46 層，13#14#樓 32 層，12#樓 30 層。二、工程地質條件工程地質柱狀圖根據(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9.4一 14.3一一23.3一-30.1一遜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二一.序號檢測面 編號/80

3、m樁埋設深度67m 樁57m 樁3_埋設深度埋設深度備注1J1魏筋應力計布置曙就面示8意圖為標定斷面2J29.49.49.4各深度均為樁頂面 往下計算3J314.314.314.34J423.323.323.35J530.130.130.16J636.536.536.57J73939398J845.745.745.79J951.751.751.710J1057.557.55757m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#第二章樁身力測試一、檢測目的

4、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、測試設備與鋼筋測力計的埋設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 筋測力計根本呈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、 連接在應力計的電纜線用柔性材料保護，綁扎在鋼筋籠側并 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

5、變形協(xié)調(diào)；樁頂下砼彈性模量 一樣；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2、樁身圍砼彈性模量Ecj確實定：將J1截面作為標定截面i=1，值，用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此推算各載荷等級下鋼筋應變£ slj，由于假定砼與鋼筋協(xié)同受力，不出現(xiàn)裂縫，故砼應變 £ c1j= £ slj，由此可以算出各載荷等級下樁身砼的 彈性模量Ecij。利用鋼筋應變£ slj與樁身砼的彈性模量Ecij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

6、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:PzjEc j ? Ac j ? c j Esj ? Asj ? s j (Ec j ? Ac j Esj ? As j ) ? s j式中：Ecj、Eq砼彈性模量、鋼筋彈性模量 Es取2.0 x 108(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：2 2 'Psij k?(FijFi2)Es? Sij ? AsiSij式中：Psij 第i量測截面處在j級荷載下應力計所受軸向力 kNFj第i量測截面處在j級荷載下應力

7、計的實測頻率值(Hz)Fi0i截面處鋼筋應力計的初始頻率值 HzK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:PijECij ? ACi ? Sij E SASi ? Sij(i 1,14)fRj Ri ij6、樁側摩阻力計算fij:式中：fij i截面至i+1截面之間在第j級荷載量下的樁側摩阻力 kPaRij i截面在j級荷載量下的軸力kNAi i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土層的界面處，以測量樁在不 同土層中的分層

8、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。鋼筋計應按主筋直 徑大小選擇。儀器的可測頻率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 儀進展測量，頻率儀的分辨力應優(yōu)于或等于 1Hz4、在載荷試驗時進展樁身力測試。五、實測曲線樁身軸力/0240043007200900 12DCID側摩阻力/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#樁樁身軸力分布圖1#樁樁身側摩阻力分布圖樁身軸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側摩阻力/kF耳0102030 4050 60 70 S3 90 100 *r V M'AllII3#樁樁身軸力分布圖3#樁樁身側摩阻力分布圖樁身鈾力/kN0 湖 00 4SOO 72CD 9500 120C0側摩阻力應01020 30 4D 50 60 70 aO 90102C506090SO-*-10800-O-120C0-2400-'3600 一4S00

11、 sooc-*-7200 -t- 84004#樁樁身軸力分布圖樁身軸力/跟J1：i)10ID304O5O6O70SO4#樁樁身側摩阻力分布圖1020E 3072CKJ12000也/W/70- 24Q0 - 3600-*- 4800- SOOO一72Q0 十 8400-1-9600-*-10SOO-'-1200030405060側摩阻力加3105030 4050 甜 70 SO 50 10070 L8 / 20UUU 2400-3600 *-4300ano7200 40096001 i)800 120006#樁樁身軸力分布圖6#樁樁身側摩阻力分布圖樁身軸力/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側摩阻力/W且 ID 20 30 40 SO 60 700090 100U. ULM 民U1 JUL-tUUJ丄11i 止4 + 址 A醫(yī)-2400 -3600 4600 -一 6000 -*- 7200 - S400 -+-960O -*-1800 -u-120007#樁樁身軸力分布圖7#樁樁身側摩阻力分布圖樁身軸力/kN2 斗 OD4SOO

13、*7200弭 0Q 12000側摩阻力/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#樁樁身軸力分布圖8#樁樁身側摩阻力分布圖樁身軸力/kN02400

14、 4BOO 720096C0 12000/惻摩阻力/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#樁樁身軸力分布圖樁身軸力/'kM2400430Q T2Q0 9600 120QO/ "/ / O/F 聲了扌4 y * y 単仃/ 俗/ 4莊/. /f -2400- 3

15、600*-4300- 6000*- 72003400 9500<-198001200010 / 20II II+ 瀬II9#樁樁身側摩阻力分布圖0 W 2C 20 405C 60 70 SO SO 100_1I1-fJL24CO33004900eaoo-*- 7300-0400TfiOO *一 1D600*- 12000"110#樁樁身軸力分布圖10#樁樁身側摩阻力分布圖樁身軸力/kN02404007200 罪 001200011#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123456789J11.82400360048

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#樁身側壁摩阻力數(shù)據(jù)表(kPa)截面序號深度圍加載等級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#樁身軸力數(shù)據(jù)表(kN)截面序號深度加載等級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#樁身側壁摩阻力數(shù)據(jù)表kPa截面序號深度圍加載等級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#樁身軸力數(shù)據(jù)表kN截面序號深度加載等級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#樁身側壁摩阻力數(shù)據(jù)表(kPa)截面序號深度圍加載等級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#樁身軸力數(shù)據(jù)表(kN)截面序號深度加載等級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#樁身側壁摩阻力數(shù)據(jù)表(kPa)截面序號深度圍加載等級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#樁身軸力數(shù)據(jù)表(kN)截面序號深度加載等級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#樁身側壁摩阻力數(shù)據(jù)表(kPa)截面序號深度圍加載等級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#樁身軸力數(shù)據(jù)表(kN)截面序號深度加載等級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#樁身側壁摩阻力數(shù)據(jù)表(kPa)截面序號深度圍加載等級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