引水發(fā)電洞回填固結工程量超合同估算量原因分析的報告

1、引水發(fā)電洞回填、固結工程量超合同估算量原因分析的報告1、概述引水發(fā)電洞沿軸線展開全長696.89m，其中上平洞長236.57m，進口段為66m方變圓漸變段，變徑后洞子直徑6m。上彎段、下彎段和豎井段總長度為95.2m。下平段長度304.66m，混凝土襯砌段150.02m，鋼襯段長度154.64m。出口壓力鋼管明管段長度60.46m。引水發(fā)電洞回填、固結灌漿工程量見表1-1所示：表1-1 引水發(fā)電洞回填、固結工程量表序號項目單位合同工程量設計圖紙 工程量實際已完工程量折合重量(t)11-3引水發(fā)電洞工程11-3-1回填灌漿m2508243424450.62383.9311-3-2固結灌漿11-3

2、-2-1（1）固結灌漿鉆孔m5394/5448.431550.42（2）固結灌漿檢查孔鉆孔m260/240.2711-3-2-2固結灌漿 m549840725448.43灌入總水泥量1934.352、引水發(fā)電洞回填、固結灌漿技術要求2.1 施工依據(jù)主要依據(jù)有：納子峽水電站引水發(fā)電工程合同（ZX-JS-NZX-第22號（2011）總145號）；引水發(fā)電洞洞身段及壓力鋼管埋管段二次支護圖（圖號：納子峽施工圖水電洞03）、水工建筑物水泥灌漿施工技術規(guī)范（DL/T5148-2001）、設計更改通知單引水發(fā)電洞洞身段及壓力鋼管埋管段二次支護圖（通知單編號：NZX-YF-2013-02）。2.2 灌漿技術

3、要求上平段、上下彎段、下平段及壓力鋼管埋管段進行回填灌漿，灌漿范圍為頂拱120，灌漿孔呈梅花形布設，灌漿孔深入基巖10cm，間排距3m，灌漿壓力0.3Mpa。上平段、上下彎段及豎井段和下平段進行固結灌漿，灌漿孔深入巖4m，全斷面間排距3m，電洞：0+021.00電洞：0+274.85灌漿壓力0.6Mpa，電洞：0+274.85電洞：0+442.15灌漿壓力1.2Mpa。壓力鋼管埋管段及明管段進行接觸灌漿，灌漿范圍為底拱90，灌漿壓力為0.1Mpa。3、引水發(fā)電洞招標文件與施工階段提供地質(zhì)情況對比3.1 招標文件中地質(zhì)情況描述 招標文件第八章 專用技術條款中第1章 一般規(guī)定P13頁：引水發(fā)電洞洞

4、身段埋深36-68m，巖性為黑云母石英片巖夾花崗片麻巖。3.2 施工階段地質(zhì)情況描述 引水發(fā)電洞開挖揭露后，地質(zhì)情況與招標文件提供的地質(zhì)情況發(fā)生了很大變化。引水發(fā)電洞進口漸變段、上平段巖石破碎，裂隙發(fā)育，頂拱塌方嚴重，較大塌方處高度達到6.0m，整個支護全部安裝鋼結構拱架。上彎段、豎井和下彎段巖石裂隙發(fā)育，切割嚴重，在上彎段至豎井底部有小斷層，斷層寬度0.4-1.2m，充填軟泥。下平段巖石局部破碎，夾泥層分部較多，下平段電洞0+400.13-596.79洞壁滲水嚴重，平均滲流量0.4-0.75m3/s。3.3 圍巖類別變化對照表 圍巖類別變化對照見表3-1所示。表3-1 引水發(fā)電洞圍巖類別變化

5、對照表勘測階段圍巖類別施工階段圍巖類別序號樁 號類別長度(m)序號樁 號類別長度(m)10+20-0+32V1210+20-0+32V1220+32-0+52.47IV20.4720+32-0+100IV6830+52.47-0+182.47III13030+100-0+126III2640+182.47-0+222.47IV4040+126-0+170IV4450+222.47-0+357.47III13550+170-0+190III2060+357.47-0+392.47IV3560+190-0+273IV8370+392.47-0+462.47III7070+273-0+480III2

6、0780+462.47-0+546.17IV83.780+480-0+540IV6090+546.17-0+596.79V50.6290+540-0+596.79V56.79III類：335m占總洞長58%III類：253m占總洞長43.9%IV類：179.17m占總洞長31%IV類：255m占總洞長44.1%V類：62.62m占總洞長11%V類：68.79m占總洞長12%從上表可知：引水發(fā)電洞開挖揭露后，與勘測階段圍巖類別對比變化較大，圍巖發(fā)生變化區(qū)域見下表：表3-2 引水發(fā)電洞圍巖發(fā)生變化區(qū)域圍巖變化樁號范圍變化形式長度（m）備注0+052.470+100.00類圍巖變?yōu)?7.530+12

7、6.000+170.00類圍巖變?yōu)?4.000+222.470+273.00類圍巖變?yōu)?0.530+540.000+546.17類圍巖變?yōu)?.173.4 引水發(fā)電洞巖石揭露后現(xiàn)場照片 3.5納子峽大壩左岸山體主要分析大壩左岸斜趾板固結灌漿工程由四川準達巖土工程有限責任公司完成的大壩左岸斜趾板（灌漿洞）固結灌漿工程。固結灌漿砼鉆孔230.3m，基巖鉆孔2073.9m，耗灰1190.34t，單位耗灰573.96kg/m；檢查孔鉆孔83.2m，耗灰2.52t，單位耗灰30.31kg/m；抬動孔鉆孔378m。泄洪洞進口段固結灌漿工程 由中國水電四局承建的泄洪洞工程，進口段樁號XHD0+69.20-0+

8、84.20段，固結灌漿固結灌漿砼鉆孔深度248.70m，總耗灰181.058t，單位耗灰728.02kg/m。以上兩家單位的施工洞與我單位承建的引水發(fā)電洞位于同一山體上，其中四川準達大壩左岸斜趾板（灌漿洞）位于引水發(fā)電洞的上方，其固結灌漿單位耗灰573.96kg/m；中國水電四局承建的泄洪洞位于引水發(fā)電洞的下方，固結灌漿單位耗灰728.02kg/m；我單位承建引水發(fā)電洞固結灌漿序單位耗灰442.00kg/m，序單位耗灰,128.40kg/m。根據(jù)以上情況說明左岸山體整體裂隙較發(fā)育，巖石較破碎。且我單位固結灌漿單耗為最低。4、引水發(fā)電洞回填、固結實際工程量統(tǒng)計4.1 回填灌漿 引水發(fā)電洞回填灌漿

9、統(tǒng)計匯總表見表4-1所示。表4-1 引水發(fā)電洞回填灌漿工程量統(tǒng)計表序號工程部位 回填灌漿面積(m2)總耗灰量(kg)單耗(kg/m2)備注1第1單元118.6251760.9114.842第2單元78.275607.457.763第3單元9312713.65136.714第4單元934016.3943.195第5單元934704.7150.596第6單元933432.5636.917第7單元91.4883669.4040.118第8單元87.964840.0055.029第9單元88.63224411.19275.4210第10單元934792.6551.5311第11單元933361.183

10、6.1412第12單元931712.0918.4113第13單元90.6485899.2465.0814第14單元87.9622520.53256.0315第15單元91.992918.809.9916第16單元93454.394.8817第17單元9324152.60259.7118第18單元93689.717.4219第19單元931009.7710.8620第20單元77.2682228.8528.8521第21單元308.7765649.5718.3022第30單元162.6971480.469.1023第31單元87.961833.2120.8424第32單元87.961537.19

11、17.4825第33單元87.961990.5222.6326第34單元87.962522.0528.6727第35單元87.967059.2180.2528第36單元87.962146.5624.4029第37單元87.962234.0225.4030第38單元87.962883.0732.7831第39單元87.966852.577.9032第40單元87.966796.3577.2733第41單元87.968804.26100.0934第42單元87.962858.9432.5035第43單元44.127286.346.4936第44單元87.964521.43951.4037第45單元

12、80.48222.668102.2738第46單元80.49444.381117.4739第47單元80.47830.07797.3940第48單元80.47572.29494.1841第49單元80.43427.95742.6442第50單元80.424341.12302.7543第51單元80.417839.73221.8944第52單元80.419398.03241.2745第53單元80.425111.85312.3446第54單元80.433720.18419.4047第55單元80.434639.88430.8448第56單元71.2885026.870.514450.613839

13、26.7386.26備注：整個引水發(fā)電洞回填灌漿圖紙設計量4450.61m2,合同估算單耗69kg/m2；實際單耗86.26 kg/m2，超出合同估算單耗17.26 kg/m2,超灌水泥130.3噸。4.2 固結灌漿引水發(fā)電洞回填灌漿統(tǒng)計匯總表見表4-2所示。表4-2 引水發(fā)電洞固結灌漿工程量統(tǒng)計表序號工程部位灌漿 孔數(shù)灌漿延米(m)灌漿分序（m）灌漿情況（Kg）總耗灰量樁號平均單耗kg/m單元平均單耗kg/m序序1第1單元0+022.00421.94I4442.66202.49373.10 42.27 423.30II295.1612.6720+025.00421.96I12293.9655

14、9.83421.69II606.1827.9530+028.00421.09I2284.54108.32420.62II348.9716.9240+031.00316.29I11304.72693.97315.86II2193.15138.285第2單元0+034.00315.73I1904.74121.09406.04 61.84 316.01II216.0613.5060+037.00315.93I7807.11490.09315.82II1004.3363.4870+040.00315.56I3900.40250.67316.15II309.7919.1880+043.00315.80I

15、11976.59758.01316.50II2457.04148.919第3單元0+046.00315.11I2384.21157.79551.70 53.29 316.56II332.7320.09100+049.00316.77I11243.35670.44316.79II1233.5973.47110+052.00314.92I2027.80135.91315.94II577.3036.22120+055.0036.58I13794.472096.42317.11II1394.9981.5313第4單元0+058.00315.06I1824.96121.18259.99 71.07 31

16、6.35II348.0021.28140+061.00315.99I7027.13439.47317.40II2040.30117.26150+064.00318.95I2624.64138.50317.53II410.0823.39160+067.00318.18I6249.25343.74318.94II2191.84115.7317第5單元0+070.00315.34I2256.75147.12477.91 123.31 316.16II1051.6465.08180+073.00315.25I9886.98648.33316.56II2403.77145.16190+076.00315

17、.25I11014.60722.27317.41II952.0354.68200+079.00315.72I6261.95398.34316.22II3774.00232.6821第6單元0+082.00315.55I1297.1983.42303.28 81.46 315.51II294.6519.00220+085.00316.57I5493.85331.55316.28II2595.68159.44230+088.00315.51I1845.36118.98315.92II345.0621.67240+091.00316.00I10661.30666.33316.81II2020.411

18、20.1925第7單元0+094.00315.53I2685.56172.93405.10 114.72 315.77II248.7315.77260+097.00315.41I8308.62539.17316.49II3054.60185.24270+100.00314.95I2832.37189.46314.90II221.7414.88280+103.00315.28I10953.65716.86315.28II3638.31238.1129第8單元0+106.00314.95I2968.91198.59485.78 161.43 315.35II913.0459.48300+109.0

19、0315.27I12523.68820.15315.20II3087.92203.15310+112.00314.88I4794.93322.24314.70II1018.3369.27320+115.00316.10I9442.25586.48315.85II4844.08305.6233第9單元0+118.00316.10I4026.71250.11445.76 119.33 317.65II1041.8559.03340+121.00315.91I5881.63369.68315.11II2714.72179.66350+124.00315.15I3660.95241.65315.75I

20、I1039.9266.03360+127.00315.00I14138.99942.60315.22II2808.70184.5437第10單元0+130.00317.25I3423.91198.49591.74 116.52 317.55II1255.2171.52380+133.00316.21I18572.581145.75317.47II3461.91198.16390+136.00317.36I3874.68223.20318.25II1012.9055.50400+139.00320.25I16183.87799.20316.23II2368.08145.9141第11單元0+14

21、2.00316.71I4815.01288.15630.76 132.37 318.10II1755.9297.01420+145.00316.24I10761.09662.63316.57II2793.94168.61430+148.00316.92I7768.17459.11317.35II1140.8565.76440+151.00315.30I17762.151160.92316.86II3427.11203.2745第12單元0+154.00316.65I5570.53334.57591.47 119.38 317.00II1547.6491.04460+157.00315.80I1

22、1747.20743.49317.05II1576.7692.48470+160.00317.12I8119.10474.25316.90II2013.42119.14480+163.00316.20I13464.39831.14316.56II2921.19176.4049第13單元0+166.00316.05I5935.22369.80396.84 114.14 316.47II2000.66121.47500+169.00315.80I5618.94355.63316.44II2900.58176.43510+172.00316.60I6697.55403.47316.85II1533.

23、8391.03520+175.00316.60I7562.91455.60316.66II1146.0068.7953 第14單元0+178.00315.65I7900.13504.80725.17 100.11 316.25II1084.0666.71540+181.00315.50I9918.53639.91316.25II1864.34114.73550+184.00315.70I9388.80598.01316.75II2685.16160.31560+187.00315.65I18115.391157.53315.85II883.4555.7457第15單元0+190.00316.8

24、4I5651.29335.59509.13 193.70 317.45II1982.56113.61580+193.00316.05I12228.36761.89317.35II3493.43201.35590+196.00316.50I8124.15492.37316.83II2728.04162.09600+199.00315.10I6830.12452.33316.00II4896.11306.0161第16單元0+202.00316.35I856.3352.37319.94 148.89 316.76II977.8758.35620+205.00315.90I5968.17375.36

25、316.70II927.5755.54630+208.00316.00I840.7052.54316.28II764.7246.97640+211.00316.34I13000.02795.59317.18II7293.66424.5465第17單元0+214.00317.25I8351.28484.13684.34 338.69 317.90II2533.03141.51660+217.00318.15I11758.52647.85317.11II14075.00822.62670+220.00316.77I4519.97269.53317.10II2518.54147.28680+223.

26、00316.32I22240.661362.79317.00II4280.08251.7769第18單元0+226.00318.28I878.7948.0768.66 19.90 317.33II181.1610.45700+229.00317.42I1750.75100.50317.79II598.6933.65710+232.00317.32I425.2324.55316.32II112.496.89720+235.00316.31I1705.10104.54317.14II472.6827.5873第19單元0+238.00316.82I584.1934.73173.42 83.20 3

27、17.11II233.9213.67740+241.00316.57I4948.32298.63316.89II2281.69135.09750+244.00316.50I2203.04133.52316.66II267.5816.06760+247.00315.82I3659.87231.34316.10II2770.91172.1177第20單元0+250.00315.62I7446.07476.70436.79 18.43 316.35II498.6930.50780+253.00316.38I619.3937.81316.70II185.5511.11790+256.00316.01I

28、12904.76806.04316.01II220.0413.7480第21單元0+258.435313.82I1797.16130.04238.85 25.90 313.90II262.0918.86810+261.31314.34I2555.65178.22314.32II327.8122.89820+264.284420.71I7434.31358.97420.70II457.2522.09830+267.493 14.51I880.9760.71314.34II545.1938.02840+267.94422.78I39493.221733.68423.25II860.4537.018

29、50+270.45534.81I1228.5835.29534.83II658.6218.91860+270.70313.97I970.5569.47313.96II653.8046.83870+272.57536.97I1484.9340.17538.75II369.749.54880+274.37534.42I1459.4742.40533.86II941.3527.80890+275.81422.50I1249.4455.53 422.90II736.5732.16 900+276.85420.91I1095.3652.38 420.93II707.5433.81 91第22單元高程31

30、49.27315.19I9526.55627.16627.16 120.80 315.23II1839.81120.8092第23單元高程3146.27315.14I6871.38453.86548.85 113.51 315.28II1673.11109.5093高程3143.27314.98I9660.04644.86315.23II1790.15117.5494第24單元高程3140.27315.27I4060.46265.91492.46 118.70 315.06II1630.05108.2495高程3137.27315.57I11127.00714.64314.60II1890.6

31、6129.5096第25單元高程3134.27310.27I9438.72919.06919.06 141.46 315.34II2169.92141.4697第26單元高程3131.27315.09I5931.52393.08533.82 151.24 314.73II2171.45147.4298高程3128.27315.01I10136.50675.32315.02II2327.82154.9899第27單元高程3125.27314.55I3635.81249.88306.65 183.06 314.85II1302.0887.68100高程3122.27315.15I5471.8136

32、1.18314.79II4123.71278.82101第28單元高程3119.27314.82I15415.671040.191040.19 155.16 314.97II2322.69155.16102第29單元高程3116.27314.57I4475.33307.16712.78 212.92 314.73II2240.13152.08103高程3113.27314.65I16352.121116.19314.63II4011.13274.17104第30單元0+271.857313.98I7383.49528.15317.60 173.32 313.84II4289.96309.971

33、050+272.167314.13I5208.35368.60314.15II1907.11134.781060+272.928420.47I9076.85443.42420.31II5785.59284.861070+274.124422.38I5162.08230.66420.71II2832.35136.761080+275.729533.15I11356.11342.57533.09II7385.16223.181090+277.707538.68I6910.81178.67536.56II2950.4680.701100+280.015534.64I8958.64258.62534.

34、59II7392.52213.721110+282.603420.33I4903.10241.18423.22II2468.62106.311120+285.415421.00I8466.37403.16420.94II3605.18172.171130+288.389314.74I5383.95365.26314.37II2075.36144.421140+291.461313.90I5764.08414.68314.01II1908.04136.19115第31單元0+294.13314.91I3332.60223.51682.40 194.91 314.93II1085.5172.711

35、160+297.13315.18I16988.101119.11315.02II5070.39337.581170+300.13314.72I4813.54327.01 315.30II1357.3588.72 1180+303.13314.86I15584.381048.75 315.13II4255.35281.25 119第32單元0+306.13315.24I3298.82216.46 729.33 240.23 315.05II1590.28105.67 1200+309.13315.13I17399.891150.03 315.52II5551.91357.73 1210+312.

36、13314.90I2960.58198.70 314.84II1984.13133.70 1220+315.13314.62I20020.201369.37 314.72II5318.78361.33 123第33單元0+318.13314.36I4335.58301.92 708.33 246.77 314.41II1101.7776.46 1240+321.13314.36I16550.001152.51 314.40II4815.82334.43 1250+324.13314.39I3588.94249.41 314.44II1961.16135.81 1260+327.13314.37

37、I16240.331130.16 314.44II6357.38440.26 127第34單元0+330.13314.41I3501.18242.97 741.87 218.46 314.43II1933.02133.96 1280+333.13314.38I14358.99998.54 314.41II4499.26312.23 1290+336.13314.41I4004.80277.92 314.48II2212.16152.77 1300+339.13314.43I20889.201447.62 314.45II3976.07275.16 131第35單元0+342.13314.40I

38、3285.01228.13 599.79 184.76 314.41II1738.17120.62 1320+345.13314.44I12537.63868.26 314.42II3318.38230.12 1330+348.13314.43I3872.95268.40 314.35II1436.77100.12 1340+351.13314.43I14912.451033.43 314.45II4154.49287.51 135第36單元0+354.13314.37I2986.36207.82 535.61 142.00 314.39II1130.4578.56 1360+357.1331

39、4.45I10061.76696.32 314.43II2999.19207.84 1370+360.13314.43I4084.64283.07 314.41II1051.7972.99 1380+363.13314.45I13771.97953.08 314.31II2988.98208.87 139第37單元0+366.13314.36I2328.77162.17 292.99 118.06 314.35II946.7865.98 1400+369.13314.29I5255.86367.80 314.35II2591.19180.57 1410+372.13314.34I3055.85

40、213.10 314.35II1013.1570.60 1420+375.13314.30I6144.95429.72 314.31II2220.92155.20 143第38單元0+378.13314.27I3779.21264.84 445.20 126.07 314.34II1397.8197.48 1440+381.13314.38I11501.05799.79 314.30II2263.41158.28 1450+384.13314.26I2666.47186.99 314.30II1304.7691.24 1460+387.13314.31I7527.68526.04 314.25

41、II2243.70157.45 147第39單元0+390.13314.16I2224.56157.10 464.44 131.02 314.23II949.2566.71 1480+393.13314.28I10456.27732.23 314.13II2506.03177.36 1490+396.13314.14I3695.65261.36 314.32II1005.6270.22 1500+399.13314.21I9999.12703.67 314.25II2998.26210.40 151第40單元0+402.13314.14I2490.06176.10 395.19 157.65

42、314.27II988.3769.26 1520+405.13314.18I11192.92789.35 314.17II2635.59186.00 1530+408.13314.15I2283.21161.36 314.14II914.6164.68 1540+411.13314.20I6429.26452.76 314.30II4428.70309.70 155第41單元0+414.13314.29I3099.98216.93 297.83 133.53 314.18II955.6767.40 1560+417.13314.38I6973.84484.97 314.20II2910.71204.98 1570+420.13314.15I2892.41204.41 314.21II1321.2592.98 1580+423.13314.31I4048.93282.94 314.24II2400.70168.59 159第42單元0+426.13314.31I2955.66206.55 455.82 184.13 314.26II1279.1989.70 1600+429.13314.33I3180.46221.94 314.12II4110.11291.08 1610