樁身應(yīng)力測(cè)試報(bào)告

1、第一章工程概況一、工程概述工程名稱工程地點(diǎn)委托單位建設(shè)單位勘察單位設(shè)計(jì)單位基樁施工單位監(jiān)理單位檢測(cè)目的測(cè)試樁身軸力與樁側(cè)摩阻力檢測(cè)依據(jù)規(guī)范JGJ106-2003結(jié)構(gòu)類型男力層數(shù)46、32和30層樁型鉆孔灌注樁樁徑（mm）800設(shè)計(jì)樁長(zhǎng)57.0m、67.0m和80.0m樁端持力層粉質(zhì)粘土、細(xì)砂試樁總數(shù)14棵施工日期2008.1.312.10檢測(cè)樁數(shù)9棵檢測(cè)日期2010.3.33.26硅強(qiáng)度等級(jí)C35抽測(cè)類型部分檢測(cè)單樁豎向抗壓拔承載力特征值6000kN要求最大加載值12000kN檢測(cè)方法靜載荷慢速維持荷載法過(guò)程中測(cè)量鋼筋應(yīng)力計(jì)備注檢測(cè)現(xiàn)場(chǎng)溫度、濕度滿足檢測(cè)要求，無(wú)強(qiáng)振動(dòng)、強(qiáng)磁場(chǎng)等干擾；其中8#1

2、1搬46層，13#14破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(bào)告，該場(chǎng)地工程地質(zhì)條件如下:三、檢測(cè)樁位示意圖四、鋼筋應(yīng)力計(jì)在樁身埋設(shè)位置示意圖1Q1Q1R1d1.Q94LrQJLIi|'1-1l.C-9.4一14311-143-23.3301114.31EJ,-J飛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鋼筋應(yīng)力計(jì)在各試樁中位置示意圖廠一、鋼筋

3、應(yīng)力計(jì)'鋼筋應(yīng)力計(jì)布置截面示意圖鋼筋應(yīng)力計(jì)埋設(shè)位置表序號(hào)檢測(cè)面編R80m樁埋設(shè)深度67m樁埋設(shè)深度57m樁埋設(shè)深度備注1J11.81.81.8為標(biāo)定斷面2J29.49.49.4各深度均為樁頂面往下計(jì)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(cè)樁號(hào)1#、3#、4#6#、

4、7#、8#9#、10#、11#第二章樁身內(nèi)力測(cè)試一、檢測(cè)目的本次檢測(cè)目的是測(cè)定在各級(jí)荷載作用下樁身不同位置的軸力和樁側(cè)摩阻力的分布情況。二、測(cè)試設(shè)備及鋼筋測(cè)力計(jì)的埋設(shè)1、每樁鋼筋應(yīng)力計(jì)設(shè)置在各土層交界面處，每一個(gè)截面設(shè)2只鋼筋測(cè)力計(jì)(基本呈180°對(duì)稱布置)，各鋼筋應(yīng)力計(jì)埋設(shè)截面的平、剖面圖如前圖；2、JTM-V1000振弦式鋼筋應(yīng)力計(jì)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(yīng)力計(jì)的電纜線用柔性材料保護(hù)，綁扎在鋼筋籠內(nèi)側(cè)并引至地面；4、所有應(yīng)力計(jì)均用明顯標(biāo)記編號(hào)；5、儀器設(shè)備：檢測(cè)儀器設(shè)備采用JTM-V1000振弦式鋼筋應(yīng)力計(jì)、JTM-V10B型頻率讀數(shù)儀、集線箱

5、等組成。三、測(cè)試原理1、假定：同一截面鋼筋與混凝土的變形協(xié)調(diào)；樁頂下硅彈性模量相同；位于樁頂面以下1.8m處的J1截面所受軸力與靜載荷試驗(yàn)的加載量相同；2、樁身范圍內(nèi)硅彈性模量Ecij的確定：將J1截面作為標(biāo)定截面(i=1),量測(cè)該截面鋼筋應(yīng)力計(jì)在包括預(yù)壓的各級(jí)荷載作用下頻率變化值，用此推算各載荷等級(jí)下鋼筋應(yīng)變£s1j,由于假定硅與鋼筋協(xié)同受力，不出現(xiàn)裂縫，故硅應(yīng)變&c1j=£slj,由此可以算出各載荷等級(jí)下樁身硅的彈性模量Ecij。利用鋼筋應(yīng)變£slj與樁身硅的彈性模量Ecij的兩組數(shù)據(jù)可以擬合出關(guān)于兩者之間的相關(guān)關(guān)系，根據(jù)其余各截面在各載荷等級(jí)下鋼筋應(yīng)

6、變£sij,再通過(guò)其相關(guān)關(guān)系可以得到各截面在各載荷等級(jí)下的Ecij；3、某一截面樁身軸力Pzj計(jì)算公式為：Pzj=EcjAcjcjESjAsj*；Sj=(Ecj*AcjEsj*ASj)*Sj-式中：Ecj、Esj硅彈性模量、鋼筋彈性模量Es取2.0X108(kPa)Acj、Asj一同一截面處硅面積、鋼筋總面積。£cj、&sj一同一截面處?kù)杜c鋼筋的應(yīng)變4、鋼筋應(yīng)力計(jì)受力的計(jì)算公式：2_2'PSij=k*(Fij-Fi0)=Es；Sij*ASi(2)'Sij=噓S應(yīng))(3)式中：PSij第i量測(cè)截面處在j級(jí)荷載下應(yīng)力計(jì)所受軸向力(kN)Fj第i量測(cè)截面處

7、在j級(jí)荷載下應(yīng)力計(jì)的實(shí)測(cè)頻率值(Hz)Fi0-i截面處鋼筋應(yīng)力計(jì)的初始頻率值(Hz)K應(yīng)力計(jì)標(biāo)定系數(shù)A，多i量測(cè)截面應(yīng)力計(jì)面積(cm2)5、第i量測(cè)截面處在第j級(jí)荷載下的樁身軸力：耳二Eq1§EsAs-Sij6、樁側(cè)摩阻力計(jì)算fij：Pj-Re(i=1，14)(4)式中:fj-i截面至i+1截面之間在第j級(jí)荷載量下的樁側(cè)摩阻力（kPa）Piji截面在j級(jí)荷載量下的軸力（kN）Ai-i截面至i+1截面之間的樁側(cè)面積（m2）四、測(cè)試步驟1、將弦式鋼筋應(yīng)力計(jì)按產(chǎn)品使用要求預(yù)埋在試樁樁身指定位置；2、弦式鋼筋應(yīng)力計(jì)宜放在兩種不同性質(zhì)土層的界面處，以測(cè)量樁在不同土層中的分層摩阻力。在地面處（或

8、以上）應(yīng)設(shè)置一個(gè)測(cè)量斷面作為鋼筋應(yīng)力計(jì)傳感器標(biāo)定斷面。鋼筋應(yīng)力計(jì)埋設(shè)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(duì)稱設(shè)置2個(gè)鋼筋應(yīng)力計(jì)。鋼筋計(jì)應(yīng)按主筋直徑大小選擇。儀器的可測(cè)頻率范圍應(yīng)大于樁在最大加載時(shí)的頻率的1.2倍;3、使用前應(yīng)對(duì)鋼筋計(jì)逐個(gè)標(biāo)定，得出壓力（拉力）與頻率之間的關(guān)系。帶有接長(zhǎng)桿弦式鋼筋計(jì)可焊接在主筋上；弦式鋼筋計(jì)通過(guò)與之匹配的頻率儀進(jìn)行測(cè)量，頻率儀的分辨力應(yīng)優(yōu)于或等于1Hz;4、在載荷試驗(yàn)時(shí)進(jìn)行樁身內(nèi)力測(cè)試。五、實(shí)測(cè)曲線樁身軸力/kN側(cè)摩阻力/kPa9酋0012000720020S3。50J/1/./w/毗/407080-240036004800-000T-720084

9、009500-*-10800-*-12000307030203C506070809010020501#樁樁身軸力分布圖1#樁樁身側(cè)摩阻力分布圖樁身軸力/kN側(cè)摩阻力/kPa0102030405060706090100024004800720096001200010m305。6070SO2400720034C0-+-3600-*-10500f-120CO480060CO樁身軸力/kN02400480072CO360012000ooooo345bEMfMhl!/IfJ./"/bzF-24003500J4300-60QC-*-7200一8400i-9500-*-1080012000樁身軸力

10、/kN1I10m40惻摩阻力/kPa1020304050SO708。90130LOU4set7080-2400-3600-*-48006000-*-7200-aS400rA9600-*-10800-#-120004#®樁身側(cè)摩阻力分布圖10203040506070a/Mfrn2048007200960012000側(cè)摩阻力/kPaa10203040506070BO90100W”/3/W/ZZIUW3V"-24003600-d4000_*一£000T-7200一十34009600-*-1DSD0一*T20?？?04070:出丁TP出-2400-36004800一一60

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

12、96?？谝灰?0600k*-120007#®樁身側(cè)摩阻力分布圖側(cè)摩阻力/kPa6070SO30100U1020g30燃M4050SO蛛#4（獎(jiǎng)*W/W/齦/-2400-360口-*-4800-6000*-7200S4009600一10800-*-120000102030401020丸405050E忘W240036004&00-*-皈。T72008400i9百口。-*-icsao-*-12000樁身軸力/kN/2400480072009印。120001/監(jiān)/岸IU1U4800-60007200*-8400一一9600-*-10800-*-120009#樁樁身軸力分布圖樁身軸力/

13、kN4800.w/Q2m36004800-6000-fr-72008400一4一960口10800-*-12000側(cè)摩阻力/kPa0102030405060703090100IP|'II-ll"!"!"I"I"om12000O一一2400-3600一»4800-A彌）0-*一7200840096cle-*-loaoo9#tt樁身側(cè)摩阻力分布圖惻摩阻力/kPa010203040oCHRDE。寸國(guó)s50EC708090100J-240D3600一4SOO一一6000-*一了2008400-+-9600-*-10800-*-1200

14、0弼0。樁身軸力/kN0制口口4S0C7200，/側(cè)摩阻力/kPa10203040506070SOSO100-2400-3600-J4S0060007200一8400-49600-*-10300吁1200011#樁樁身軸力分布圖11#樁樁身側(cè)摩阻力分布圖六、檢測(cè)成果匯總1#樁身軸力數(shù)據(jù)表(kN)截回序號(hào)深度加載等級(jí)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截回序號(hào)加載等級(jí)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身軸力數(shù)據(jù)表(kN)截回序號(hào)深度加載等級(jí)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截回序號(hào)加載等級(jí)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身軸力數(shù)據(jù)表(kN)截回序號(hào)深度加載等級(jí)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截回序號(hào)加載等級(jí)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身軸力數(shù)據(jù)表(kN)截回序號(hào)深度加載等級(jí)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截回序號(hào)加載等級(jí)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身軸力數(shù)據(jù)表(kN)截回序號(hào)深度加載等級(jí)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截回序號(hào)加載等級(jí)深度范圍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身軸力數(shù)據(jù)表(kN)截回序號(hào)深度加載等級(jí)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截回序號(hào)加載等級(jí)深度范圍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