真空聯(lián)合堆載預(yù)壓設(shè)計及沉降計算

PAGEPAGE5計算采用的規(guī)范采用的規(guī)范：《港口工程地基》（JTJ250-98）采用的軟件：地基計算系統(tǒng)（天津港灣工程研究所）計算內(nèi)容鉆孔D12、D16、D19、D21、G27、G30的使用期沉降計算、預(yù)壓期沉降計算及殘余沉降計算。計算說明真空聯(lián)合堆載預(yù)壓方案：首先吹填海砂至+5m，然后在上部鋪設(shè)0.5m中粗砂墊層，并打設(shè)排水板打至④1層頂部，間距1m，正方形布置，排水板打設(shè)完畢后在處理范圍四周打設(shè)粘土防滲墻，然后進(jìn)行真空聯(lián)合堆載預(yù)壓處理，處理完畢后回填開山石至使用高程5.7m。施工流程如下：吹填海砂至標(biāo)高+5.0m→鋪設(shè)0.5m砂墊層→打設(shè)排水板→邊界處打設(shè)粘土拌和墻→鋪設(shè)一層單面壓膜防水編織布→鋪三層密封膜→鋪設(shè)一層土工布→鋪設(shè)0.2m砂層及0.3m碎石屑→回填并堆載開山石1.2m→施工完畢，1000KN.m普夯。加荷速率如下圖所示：真空聯(lián)合堆載預(yù)壓沉降計算過程如下：使用期沉降計算：本范圍堆場使用荷載按60kPa計算，長期作用考慮準(zhǔn)永久系數(shù)0.8。由于大面積均載作用，不考慮地基附加應(yīng)力的擴(kuò)散。使用期堆場上部結(jié)構(gòu)層按80cm厚度考慮，折算成均載為20kPa。使用期總沉降量包括：①面層結(jié)構(gòu)和土基頂部吹填砂及回填料引起的附加應(yīng)力產(chǎn)生的沉降；②均載60kPa作用下的沉降，準(zhǔn)永久系數(shù)取用0.8；③預(yù)壓補(bǔ)填料荷載作用下的沉降。沉降計算采用分層總和法計算，排水板從回填海砂頂部打到第④1層頂部，使用期按30a計。采用DJS程序計算出使用期30a沉降值見各鉆孔沉降匯總表（表1真空聯(lián)合堆載預(yù)壓沉降計算：道路、堆場區(qū)預(yù)壓荷載（預(yù)壓荷載指沉降穩(wěn)定后在土基頂面5.7m以上的荷重）按80kPa算，真空預(yù)壓荷載真空度為80kPa，上部堆載39.6kPa。預(yù)壓荷載作用下的沉降包含以下幾個方面：①土基頂面使用標(biāo)高5.7m以下至原泥面之間吹填+回填土荷重引起的沉降；②真空預(yù)壓荷載80kPa引起的沉降，恒載按90d計算；③預(yù)壓補(bǔ)填料荷載引起的沉降。沉降計算采用分層總和法計算，排水板從吹砂頂部打到第④1層頂部，采用DJS程序計算出真空聯(lián)合堆載預(yù)壓90d的沉降計算結(jié)果見各鉆孔沉降匯總表（表1），各鉆孔土層在預(yù)壓期結(jié)束時的固結(jié)度見表2。根據(jù)以上計算得出的沉降值可算殘余沉降：殘余沉降計算：殘余沉降＝使用期沉降值-真空聯(lián)合堆載預(yù)壓的沉降值+處理范圍以下下臥層沉降。通過調(diào)整預(yù)壓荷載和預(yù)壓時間使殘余沉降＜30cm。各鉆孔沉降匯總表（ms取1.1）表1鉆孔使用期30a沉降(m)預(yù)壓90d沉降（m）殘余沉降（m）G271.19661.18780.066G301.07281.11940.000D121.07160.97030.147D160.67540.56620.141D190.69270.54540.172D210.24710.25990.000各鉆孔土層固結(jié)度匯總表表2鉆孔號層號土層名稱厚度(m）固結(jié)度沉降（m）D12①1粉質(zhì)粘土1.110.0918②淤泥質(zhì)粉質(zhì)粘土9.910.8785④2含粘性土碎石2.1④2a粉質(zhì)粘土1.7④2含粘性土碎石0.5⑤1粘土3.700.0001D16①1粉質(zhì)粘土1.510.1122②淤泥質(zhì)粉質(zhì)粘土5.310.4528④2含粘性土碎石1.6⑤1粘土5.40.0050.0021D19①1粉質(zhì)粘土1.110.0894②淤泥質(zhì)粉質(zhì)粘土4.610.4523④2含粘性土碎石3.3⑤1粘土4.30.0120.0056D21①1粉質(zhì)粘土110.0779②淤泥質(zhì)粉質(zhì)粘土0.810.182G27①1粉質(zhì)粘土1.510.1175①2淤泥質(zhì)粉質(zhì)粘土110.0848③1淤泥質(zhì)粘土9.110.7132④2含粘性土碎石4.20.9920.274⑤1粘土0.900G30①2淤泥質(zhì)粉質(zhì)粘土1.510.1607④2含粘性土碎石12.10.9920.9696輸入條件：預(yù)壓期：第一加荷級吹砂0～90d第二加荷級真空預(yù)壓荷載+上部堆載120d～150d使用期：第一加荷級吹砂0～90d第二加荷級真空預(yù)壓荷載+上部堆載120d～150d第三加荷級上部結(jié)構(gòu)210d～300d水位線2.15mm＝1.1De＝1.13mDw＝0.0563m層號Cv(m2/d)Ch(m2/d)110.0132190.014774120.0154660.03257320.2327270.024538310.0279420.010627510.2793310各鉆孔計算數(shù)據(jù)文件及結(jié)果見附錄1～附錄4:附錄1:各鉆孔使用期沉降計算輸入文件附錄2:各鉆孔使用期沉降計算輸出文件附錄3:各鉆孔預(yù)壓期沉降計算輸入文件附錄4:各鉆孔預(yù)壓期沉降計算輸出文件附錄1:各鉆孔使用期沉降計算輸入文件文件名D12.IN'GCS'3,0,1-20,0,20/3.04,3.04,3.04/-20,0,20/1.94,1.94,1.94/19.1,9.1,27,9,0-20,0,20/-7.96,-7.96,-7.96/17.7,7.7,11,2.8,0-20,0,20/-15.96,-15.96,-15.96/19.8,9.8,44,16.8,00/2.15/'WHS'1,3,01,2,0,0-20,2035.28,35.281,2,0,0-20,2046.8,46.81,2,0,0-20,2068,68'CJS'5,1,3,2,1.1-20,-10,0,10,201,6,0,0,00,50,100,200,300,400.883,.823,.78,.729,.695,.6692,7,0,0,00,50,100,200,300,400,5001.224,1.071,.996,.907,.85,.81,.813,7,0,0,00,50,100,200,300,400,500.758,.737,.717,.69,.67,.652,.65210950,18250'GJS'5,3,2,2,1,.036027,1,2-20,-10,0,10,203.04,3.05,3.04,3.04,3.04-15.96,-15.96,-15.96,-15.96,-15.96-7.96,-7.96,-7.96,-7.96,-7.962.09,-3.01,-11.9610950,182500,90,21090,120,3001.128,.0563,-20,201,.0147742,.027538'HTS'1,0,1,0'GCM':\軟件\專業(yè)應(yīng)用軟件\地基計算系統(tǒng)－202862－優(yōu)盤狗\Support\G33.IN文件名D16.IN'GCS'3,0,1-20,0,20/3.54,3.54,3.54/-20,0,20/2.04,2.04,2.04/19.1,9.1,27,9,0-20,0,20/-3.26,-3.26,-3.26/17.7,7.7,11,2.8,0-20,0,20/-10.26,-10.26,-10.26/19.8,9.8,44,16.8,00/2.15/'WHS'1,3,01,2,0,0-20,2026.28,26.281,2,0,0-20,2034.2,34.21,2,0,0-20,2068,68'CJS'5,1,3,2,1.1-20,-10,0,10,201,6,0,0,00,50,100,200,300,400.883,.823,.78,.729,.695,.6692,7,0,0,00,50,100,200,300,400,5001.224,1.071,.996,.907,.85,.81,.813,7,0,0,00,50,100,200,300,400,500.758,.737,.717,.69,.67,.652,.65210950,18250'GJS'5,3,2,2,1,.037514,1,2-20,-10,0,10,203.54,3.54,3.54,3.54,3.54-10.26,-10.26,-10.26,-10.26,-10.26-3.26,-3.26,-3.26,-3.26,-3.262.79,-.61,-6.7610950,182500,90,21090,120,3001.128,.0563,-20,201,.0147742,.024538'HTS'1,0,1,0'GCM':\軟件\專業(yè)應(yīng)用軟件\地基計算系統(tǒng)－202862－優(yōu)盤狗\Support\G33.IN文件名D19.IN'GCS'3,0,1-20,0,20/3.01,3.01,3.01/-20,0,20/1.91,1.91,1.91/19.1,9.1,27,9,0-20,0,20/-2.69,-2.69,-2.69/17.7,7.7,11,2.8,0-20,0,20/-10.29,-10.29,-10.29/19.8,9.8,44,16.8,00/2.15/'WHS'1,3,01,2,0,0-20,2035.82,35.821,2,0,0-20,2037.8,37.81,2,0,0-20,2068,68'CJS'5,1,3,2,1.1-20,-10,0,10,201,6,0,0,00,50,100,200,300,400.883,.823,.78,.729,.695,.6692,7,0,0,00,50,100,200,300,400,5001.224,1.071,.996,.907,.85,.81,.813,7,0,0,00,50,100,200,300,400,500.758,.737,.717,.69,.67,.652,.65210950,18250'GJS'5,3,2,2,1,.039691,1,2-20,-10,0,10,203.01,3.01,3.01,3.01,3.01-10.29,-10.29,-10.29,-10.29,-10.29-2.69,-2.69,-2.69,-2.69,-2.692.46,-.39,-6.4910950,182500,90,21090,120,3001.128,.0563,-20,201,.0147742,.024538'HTS'1,0,1,0'GCM':\軟件\專業(yè)應(yīng)用軟件\地基計算系統(tǒng)－202862－優(yōu)盤狗\Support\G33.IN文件名D21.IN'GCS'2,0,1-20,0,20/3.12,3.12,3.12/-20,0,20/2.12,2.12,2.12/19.1,9.1,27,9,0-20,0,20/.32,.32,.32/17.7,7.7,11,2.8,00/2.15/'WHS'1,3,01,2,0,0-20,2033.84,33.841,2,0,0-20,2025.2,25.21,2,0,0-20,2068,68'CJS'5,1,2,2,1.1-20,-10,0,10,201,6,0,0,00,50,100,200,300,400.883,.823,.78,.729,.695,.6692,7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11.960.9160.9150.9160.9160.916Uc(Time:*******)X=-20.00-10.000.0010.0020.00Z=2.091.0001.0001.0001.0001.000-3.011.0001.0001.0001.0001.000-11.960.9860.9860.9860.9860.986數(shù)據(jù)文件名：D16.DDD*****工程斷面數(shù)據(jù)段(GCS)*****M=3N=0NS=1AX=-20.000.0020.00AY=3.543.543.54*****1*****BX=-20.000.0020.00BY=2.042.042.04GS=19.100GL=9.100C=27.000F=9.000MG=0*****2*****BX=-20.000.0020.00BY=-3.26-3.26-3.26GS=17.700GL=7.700C=11.000F=2.800MG=0*****3*****BX=-20.000.0020.00BY=-10.26-10.26-10.26GS=19.800GL=9.800C=44.000F=16.800MG=0XW=0.000YW=2.150*****外荷載數(shù)據(jù)段(WHS)*****NPQ1=1NPQ2=3NDB=0MPQ=1NP=2NQ=0NH=0XP=-20.00020.000PP=26.28026.280MPQ=1NP=2NQ=0NH=0XP=-20.00020.000PP=34.20034.200MPQ=1NP=2NQ=0NH=0XP=-20.00020.000PP=68.00068.000*****沉降計算數(shù)據(jù)段（CJS）*****NX1=5NCJ=1MB=3NCJT=2Ms=1.10XX=-20.000-10.0000.00010.00020.000KH=1NEP=6Cci=0.0000Csi=0.0000Pc=0.000p=0.00050.000100.000200.000300.000400.000e=0.8830.8230.7800.7290.6950.669KH=2NEP=7Cci=0.0000Csi=0.0000Pc=0.000p=0.00050.000100.000200.000300.000400.000500.000e=1.2241.0710.9960.9070.8500.8100.810KH=3NEP=7Cci=0.0000Csi=0.0000Pc=0.000p=0.00050.000100.000200.000300.000400.000500.000e=0.7580.7370.7170.6900.6700.6520.652TCJ=10950.0018250.00地基沉降量計算結(jié)果====================loadcase:1(bye__p)curvesettlementofgivenlayer:X=-20.000-10.0000.00010.00020.0000.02060.03680.03680.03680.02060.06950.12710.12830.12710.06950.01890.03330.03530.03330.0189totalsettlement:SS=0.10900.19720.20030.19720.1090loadcase:2(bye__p)curvesettlementofgivenlayer:X=-20.000-10.0000.00010.00020.0000.02040.03070.03070.03070.02040.07560.12260.12350.12260.07560.02280.03830.04030.03830.0228totalsettlement:SS=0.11880.19170.19460.19170.1188loadcase:3(bye__p)curvesettlementofgivenlayer:X=-20.000-10.0000.00010.00020.0000.02930.03920.03920.03920.02930.11920.17390.17490.17390.11920.04070.06420.06730.06420.0407totalsettlement:SS=0.18910.27730.28140.27730.1891loadcase:4(bye__p)curvesettlementofgivenlayer:X=-20.000-10.0000.00010.00020.0000.07030.10670.10670.10670.07030.26420.42360.42670.42360.26420.08240.13580.14290.13580.0824totalsettlement:SS=0.41690.66610.67630.66610.4169*****固結(jié)計算數(shù)據(jù)段（GJS）*****NX2=5NZ=3NT=2KGJ=2NGJ=1CV=0.03751UM=1.00CH=2.00000XX=-20.000-10.0000.00010.00020.000YS=3.5403.5403.5403.5403.540YL=-10.260-10.260-10.260-10.260-10.260HL=-3.260-3.260-3.260-3.260-3.260Z=2.790-0.610-6.760T=****************T0=0.00090.000210.000TF=90.000120.000300.000DE=1.128DW=0.056XU1=-20.00XU2=20.00KHi=1Chi=0.01477KHi=2Chi=0.02454SettlementCalculation======================TCJi=*******時的沉降量Settlementofgivenlayer:X=-20.000-10.0000.00010.00020.0000.07030.10670.10670.10670.07030.26420.42360.42670.42360.26420.08190.13500.14200.13500.0819totalsettlementSt=0.41640.66530.67540.66530.4164沉降固結(jié)度Us=0.99880.99880.99870.99880.9988SettlementCalculation======================TCJi=*******時的沉降量Settlementofgivenlayer:X=-20.000-10.0000.00010.00020.0000.07030.10670.10670.10670.07030.26420.42360.42670.42360.26420.08240.13580.14280.13580.0824totalsettlementSt=0.41690.66610.67620.66610.4169沉降固結(jié)度Us=1.00001.00001.00001.00001.0000固結(jié)度計算結(jié)果================Uc(Time:*******)X=-20.00-10.000.0010.0020.00Z=2.791.0001.0001.0001.0001.000-0.611.0001.0001.0001.0001.000-6.760.9940.9940.9940.9940.994Uc(Time:*******)X=-20.00-10.000.0010.0020.00Z=2.791.0001.0001.0001.0001.000-0.611.0001.0001.0001.0001.000-6.761.0001.0001.0001.0001.000數(shù)據(jù)文件名：D19.DDD*****工程斷面數(shù)據(jù)段(GCS)*****M=3N=0NS=1AX=-20.000.0020.00AY=3.013.013.01*****1*****BX=-20.000.0020.00BY=1.911.911.91GS=19.100GL=9.100C=27.000F=9.000MG=0*****2*****BX=-20.000.0020.00BY=-2.69-2.69-2.69GS=17.700GL=7.700C=11.000F=2.800MG=0*****3*****BX=-20.000.0020.00BY=-10.29-10.29-10.29GS=19.800GL=9.800C=44.000F=16.800MG=0XW=0.000YW=2.150*****外荷載數(shù)據(jù)段(WHS)*****NPQ1=1NPQ2=3NDB=0MPQ=1NP=2NQ=0NH=0XP=-20.00020.000PP=35.82035.820MPQ=1NP=2NQ=0NH=0XP=-20.00020.000PP=37.80037.800MPQ=1NP=2NQ=0NH=0XP=-20.00020.000PP=68.00068.000*****沉降計算數(shù)據(jù)段（CJS）*****NX1=5NCJ=1MB=3NCJT=2Ms=1.10XX=-20.000-10.0000.00010.00020.000KH=1NEP=6Cci=0.0000Csi=0.0000Pc=0.000p=0.00050.000100.000200.000300.000400.000e=0.8830.8230.7800.7290.6950.669KH=2NEP=7Cci=0.0000Csi=0.0000Pc=0.000p=0.00050.000100.000200.000300.000400.000500.000e=1.2241.0710.9960.9070.8500.8100.810KH=3NEP=7Cci=0.0000Csi=0.0000Pc=0.000p=0.00050.000100.000200.000300.000400.000500.000e=0.7580.7370.7170.6900.6700.6520.652TCJ=10950.0018250.00地基沉降量計算結(jié)果====================loadcase:1(bye__p)curvesettlementofgivenlayer:X=-20.000-10.0000.00010.00020.0000.02090.03610.03610.03610.02090.09250.16400.16480.16400.09250.02960.05210.05470.05210.0296totalsettlement:SS=0.14300.25220.25570.25220.1430loadcase:2(bye__p)curvesettlementofgivenlayer:X=-20.000-10.0000.00010.00020.0000.01590.02280.02280.02280.01590.07620.11700.11740.11700.07620.02820.04670.04870.04670.0282totalsettlement:SS=0.12030.18650.18900.18650.1203loadcase:3(bye__p)curvesettlementofgivenlayer:X=-20.000-10.0000.00010.00020.0000.02070.02670.02670.02670.02070.10640.14820.14870.14820.10640.04510.07020.07310.07020.0451totalsettlement:SS=0.17220.24520.24850.24520.1722loadcase:4(bye__p)curvesettlementofgivenlayer:X=-20.000-10.0000.00010.00020.0000.05750.08570.08570.08570.05750.27520.42910.43100.42910.27520.10280.16900.17650.16900.1028totalsettlement:SS=0.43550.68390.69320.68390.4355*****固結(jié)計算數(shù)據(jù)段（GJS）*****NX2=5NZ=3NT=2KGJ=2NGJ=1CV=0.03969UM=1.00CH=2.00000XX=-20.000-10.0000.00010.00020.000YS=3.0103.0103.0103.0103.010YL=-10.290-10.290-10.290-10.290-10.290HL=-2.690-2.690-2.690-2.690-2.690Z=2.460-0.390-6.490T=****************T0=0.00090.000210.000TF=90.000120.000300.000DE=1.128DW=0.056XU1=-20.00XU2=20.00KHi=1Chi=0.01477KHi=2Chi=0.02454SettlementCalculation======================TCJi=*******時的沉降量Settlementofgivenlayer:X=-20.000-10.0000.00010.00020.0000.05750.08570.08570.08570.05750.27520.42910.43100.42910.27520.10250.16860.17600.16860.1025totalsettlementSt=0.43520.68340.69270.68340.4352沉降固結(jié)度Us=0.99930.99930.99930.99930.9993SettlementCalculation======================TCJi=*******時的沉降量Settlementofgivenlayer:X=-20.000-10.0000.00010.00020.0000.05750.08570.08570.08570.05750.27520.42910.43100.42910.27520.10280.16900.17650.16900.1028totalsettlementSt=0.43550.68390.69310.68390.4355沉降固結(jié)度Us=1.00001.00001.00001.00001.0000固結(jié)度計算結(jié)果================Uc(Time:*******)X=-20.00-10.000.0010.0020.00Z=2.461.0001.0001.0001.0001.000-0.391.0001.0001.0001.0001.000-6.490.9970.9970.9970.9970.997Uc(Time:*******)X=-20.00-10.000.0010.0020.00Z=2.461.0001.0001.0001.0001.000-0.391.0001.0001.0001.0001.000-6.491.0001.0001.0001.0001.000數(shù)據(jù)文件名：D21.DDD*****工程斷面數(shù)據(jù)段(GCS)*****M=2N=0NS=1AX=-20.000.0020.00AY=3.123.123.12*****1*****BX=-20.000.0020.00BY=2.122.122.12GS=19.100GL=9.100C=27.000F=9.000MG=0*****2*****BX=-20.000.0020.00BY=0.320.320.32GS=17.700GL=7.700C=11.000F=2.800MG=0XW=0.000YW=2.150*****外荷載數(shù)據(jù)段(WHS)*****NPQ1=1NPQ2=3NDB=0MPQ=1NP=2NQ=0NH=0XP=-20.00020.000PP=33.84033.840MPQ=1NP=2NQ=0NH=0XP=-20.00020.000PP=25.20025.200MPQ=1NP=2NQ=0NH=0XP=-20.00020.000PP=68.00068.000*****沉降計算數(shù)據(jù)段（CJS）*****NX1=5NCJ=1MB=2NCJT=2Ms=1.10XX=-20.000-10.0000.00010.00020.000KH=1NEP=6Cci=0.0000Csi=0.0000Pc=0.000p=0.00050.000100.000200.000300.000400.000e=0.8830.8230.7800.7290.6950.669KH=2NEP=7Cci=0.0000Csi=0.0000Pc=0.000p=0.00050.000100.000200.000300.000400.000500.000e=1.2241.0710.9960.9070.8500.8100.810TCJ=10950.0018250.00地基沉降量計算結(jié)果====================loadcase:1(bye__p)curvesettlementofgivenlayer:X=-20.000-10.0000.00010.00020.0000.01840.03190.03190.03190.01840.03980.07010.07020.07010.0398totalsettlement:SS=0.05820.10210.10210.10210.0582loadcase:2(bye__p)curvesettlementofgivenlayer:X=-20.000-10.0000.00010.00020.0000.01040.01520.01520.01520.01040.02330.03560.03560.03560.0233totalsettlement:SS=0.03370.05070.05080.05070.0337loadcase:3(bye__p)curvesettlementofgivenlayer:X=-20.000-10.0000.00010.00020.0000.02060.02720.02720.02720.02060.04820.06690.06700.06690.0482totalsettlement:SS=0.06880.09420.09420.09420.0688loadcase:4(bye__p)curvesettlementofgivenlayer:X=-20.000-10.0000.00010.00020.0000.04940.07430.07430.07430.04940.11130.17270.17280.17270.1113totalsettlement:SS=0.16070.24690.24710.24690.1607*****固結(jié)計算數(shù)據(jù)段（GJS）*****NX2=5NZ=2NT=2KGJ=2NGJ=1CV=0.01959