引水发电洞回填、固结工程量超合同估算量原因分析的报告

1、引水发电洞回填、固结工程量超合同估算量原因分析的报告1、概述引水发电洞沿轴线展开全长696.89m，其中上平洞长236.57m，进口段为6×6m方变圆渐变段，变径后洞子直径6m。上弯段、下弯段和竖井段总长度为95.2m。下平段长度304.66m，混凝土衬砌段150.02m，钢衬段长度154.64m。出口压力钢管明管段长度60.46m。引水发电洞回填、固结灌浆工程量见表1-1所示：表1-1 引水发电洞回填、固结工程量表序号项目单位合同工程量设计图纸工程量实际已完工程量折合重量(t)11-3引水发电洞工程11-3-1回填灌浆m2508243424450.62383.9311-3-2固结灌

2、浆11-3-2-1（1）固结灌浆钻孔m5394/5448.431550.42（2）固结灌浆检查孔钻孔m260/240.2711-3-2-2固结灌浆m549840725448.43灌入总水泥量1934.352、引水发电洞回填、固结灌浆技术要求2.1 施工依据主要依据有：纳子峡水电站引水发电工程合同（ZX-JS-NZX-第22号（2011）总145号）；引水发电洞洞身段及压力钢管埋管段二次支护图（图号：纳子峡施工图水电洞03）、水工建筑物水泥灌浆施工技术规范（DL/T5148-2001）、设计更改通知单引水发电洞洞身段及压力钢管埋管段二次支护图（通知单编号：NZX-YF-2013-02）。2.2灌

3、浆技术要求上平段、上下弯段、下平段及压力钢管埋管段进行回填灌浆，灌浆范围为顶拱120°，灌浆孔呈梅花形布设，灌浆孔深入基岩10cm，间排距3m，灌浆压力0.3Mpa。上平段、上下弯段及竖井段和下平段进行固结灌浆，灌浆孔深入岩4m，全断面间排距3m，电洞：0+021.00电洞：0+274.85灌浆压力0.6Mpa，电洞：0+274.85电洞：0+442.15灌浆压力1.2Mpa。压力钢管埋管段及明管段进行接触灌浆，灌浆范围为底拱90°，灌浆压力为0.1Mpa。3、引水发电洞招标文件与施工阶段提供地质情况对比3.1 招标文件中地质情况描述 招标文件第八章 专用技术条款中第1章

4、一般规定P13页：引水发电洞洞身段埋深36-68m，岩性为黑云母石英片岩夹花岗片麻岩。3.2 施工阶段地质情况描述引水发电洞开挖揭露后，地质情况与招标文件提供的地质情况发生了很大变化。引水发电洞进口渐变段、上平段岩石破碎，裂隙发育，顶拱塌方严重，较大塌方处高度达到6.0m，整个支护全部安装钢结构拱架。上弯段、竖井和下弯段岩石裂隙发育，切割严重，在上弯段至竖井底部有小断层，断层宽度0.4-1.2m，充填软泥。下平段岩石局部破碎，夹泥层分部较多，下平段电洞0+400.13-596.79洞壁渗水严重，平均渗流量0.4-0.75m3/s。3.3 围岩类别变化对照表 围岩类别变化对照见表3-1所示。表3

5、-1引水发电洞围岩类别变化对照表勘测阶段围岩类别施工阶段围岩类别序号桩 号类别长度(m)序号桩 号类别长度(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+

6、273-0+480III20780+462.47-0+546.17IV83.780+480-0+540IV6090+546.17-0+596.79V50.6290+540-0+596.79V56.79III类：335m占总洞长58%III类：253m占总洞长43.9%IV类：179.17m占总洞长31%IV类：255m占总洞长44.1%V类：62.62m占总洞长11%V类：68.79m占总洞长12%从上表可知：引水发电洞开挖揭露后，与勘测阶段围岩类别对比变化较大，围岩发生变化区域见下表：表3-2 引水发电洞围岩发生变化区域围岩变化桩号范围变化形式长度（m）备注0+052.470+100.00类

7、围岩变为47.530+126.000+170.00类围岩变为44.000+222.470+273.00类围岩变为50.530+540.000+546.17类围岩变为6.173.4引水发电洞岩石揭露后现场照片3.5纳子峡大坝左岸山体主要分析大坝左岸斜趾板固结灌浆工程由四川准达岩土工程有限责任公司完成的大坝左岸斜趾板（灌浆洞）固结灌浆工程。固结灌浆砼钻孔230.3m，基岩钻孔2073.9m，耗灰1190.34t，单位耗灰573.96kg/m；检查孔钻孔83.2m，耗灰2.52t，单位耗灰30.31kg/m；抬动孔钻孔378m。泄洪洞进口段固结灌浆工程 由中国水电四局承建的泄洪洞工程，进口段桩号XH

8、D0+69.20-0+84.20段，固结灌浆固结灌浆砼钻孔深度248.70m，总耗灰181.058t，单位耗灰728.02kg/m。以上两家单位的施工洞与我单位承建的引水发电洞位于同一山体上，其中四川准达大坝左岸斜趾板（灌浆洞）位于引水发电洞的上方，其固结灌浆单位耗灰573.96kg/m；中国水电四局承建的泄洪洞位于引水发电洞的下方，固结灌浆单位耗灰728.02kg/m；我单位承建引水发电洞固结灌浆序单位耗灰442.00kg/m，序单位耗灰,128.40kg/m。根据以上情况说明左岸山体整体裂隙较发育，岩石较破碎。且我单位固结灌浆单耗为最低。4、引水发电洞回填、固结实际工程量统计4.1 回填灌

9、浆 引水发电洞回填灌浆统计汇总表见表4-1所示。表4-1 引水发电洞回填灌浆工程量统计表序号工程部位回填灌浆面积(m2)总耗灰量(kg)单耗(kg/m2)备注1第1单元118.6251760.9114.842第2单元78.275607.457.763第3单元9312713.65136.714第4单元934016.3943.195第5单元934704.7150.596第6单元933432.5636.917第7单元91.4883669.4040.118第8单元87.964840.0055.029第9单元88.63224411.19275.4210第10单元934792.6551.5311第11单元

10、933361.1836.1412第12单元931712.0918.4113第13单元90.6485899.2465.0814第14单元87.9622520.53256.0315第15单元91.992918.809.9916第16单元93454.394.8817第17单元9324152.60259.7118第18单元93689.717.4219第19单元931009.7710.8620第20单元77.2682228.8528.8521第21单元308.7765649.5718.3022第30单元162.6971480.469.1023第31单元87.961833.2120.8424第32单元87

11、.961537.1917.4825第33单元87.961990.5222.6326第34单元87.962522.0528.6727第35单元87.967059.2180.2528第36单元87.962146.5624.4029第37单元87.962234.0225.4030第38单元87.962883.0732.7831第39单元87.966852.577.9032第40单元87.966796.3577.2733第41单元87.968804.26100.0934第42单元87.962858.9432.5035第43单元44.127286.346.4936第44单元87.964521.43951

12、.4037第45单元80.48222.668102.2738第46单元80.49444.381117.4739第47单元80.47830.07797.3940第48单元80.47572.29494.1841第49单元80.43427.95742.6442第50单元80.424341.12302.7543第51单元80.417839.73221.8944第52单元80.419398.03241.2745第53单元80.425111.85312.3446第54单元80.433720.18419.4047第55单元80.434639.88430.8448第56单元71.2885026.870.514

13、450.61383926.7386.26备注：整个引水发电洞回填灌浆图纸设计量4450.61m2,合同估算单耗69kg/m2；实际单耗86.26 kg/m2，超出合同估算单耗17.26 kg/m2,超灌水泥130.3吨。4.2 固结灌浆引水发电洞回填灌浆统计汇总表见表4-2所示。表4-2引水发电洞固结灌浆工程量统计表序号工程部位灌浆孔数灌浆延米(m)灌浆分序（m）灌浆情况（Kg）总耗灰量桩号平均单耗kg/m单元平均单耗kg/m序序1第1单元0+022.00421.94I4442.66202.49373.10 42.27 423.30II295.1612.6720+025.00421.96I12

14、293.96559.83421.69II606.1827.9530+028.00421.09I2284.54108.32420.62II348.9716.9240+031.00316.29I11304.72693.97315.86II2193.15138.285第2单元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+043.0

15、0315.80I11976.59758.01316.50II2457.04148.919第3单元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单元0+058.00315.06I1824.96121.18259.99

16、71.07 316.35II348.0021.28140+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单元0+070.00315.34I2256.75147.12477.91 123.31 316.16II1051.6465.08180+073.00315.25I9886.98648.33316.56II2403.77145.16190+0

17、76.00315.25I11014.60722.27317.41II952.0354.68200+079.00315.72I6261.95398.34316.22II3774.00232.6821第6单元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+091.00316.00I10661.30666.33316.81II

18、2020.41120.1925第7单元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单元0+106.00314.95I2968.91198.59485.78 161.43 315.35II913.0459.483

19、00+109.00315.27I12523.68820.15315.20II3087.92203.15310+112.00314.88I4794.93322.24314.70II1018.3369.27320+115.00316.10I9442.25586.48315.85II4844.08305.6233第9单元0+118.00316.10I4026.71250.11445.76 119.33 317.65II1041.8559.03340+121.00315.91I5881.63369.68315.11II2714.72179.66350+124.00315.15I3660.95241.6

20、5315.75II1039.9266.03360+127.00315.00I14138.99942.60315.22II2808.70184.5437第10单元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

21、11单元0+142.00316.71I4815.01288.15630.76 132.37 318.10II1755.9297.01420+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单元0+154.00316.65I5570.53334.57591.47 119.38 317.00II1547.6491.04460+157.00

22、315.80I11747.20743.49317.05II1576.7692.48470+160.00317.12I8119.10474.25316.90II2013.42119.14480+163.00316.20I13464.39831.14316.56II2921.19176.4049第13单元0+166.00316.05I5935.22369.80396.84 114.14 316.47II2000.66121.47500+169.00315.80I5618.94355.63316.44II2900.58176.43510+172.00316.60I6697.55403.47316.8

23、5II1533.8391.03520+175.00316.60I7562.91455.60316.66II1146.0068.7953第14单元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单元0+190.

24、00316.84I5651.29335.59509.13 193.70 317.45II1982.56113.61580+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单元0+202.00316.35I856.3352.37319.94 148.89 316.76II977.8758.35620+205.00315.90I5968.1

25、7375.36316.70II927.5755.54630+208.00316.00I840.7052.54316.28II764.7246.97640+211.00316.34I13000.02795.59317.18II7293.66424.5465第17单元0+214.00317.25I8351.28484.13684.34 338.69 317.90II2533.03141.51660+217.00318.15I11758.52647.85317.11II14075.00822.62670+220.00316.77I4519.97269.53317.10II2518.54147.286

26、80+223.00316.32I22240.661362.79317.00II4280.08251.7769第18单元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单元0+238.00316.82I584.1934.73173.42

27、83.20 317.11II233.9213.67740+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单元0+250.00315.62I7446.07476.70436.79 18.43 316.35II498.6930.50780+253.00316.38I619.3937.81316.70II185.5511.11790+256.00

28、316.01I12904.76806.04316.01II220.0413.7480第21单元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+267.94422.78I39493.221733.68423.25II860.4

29、537.01850+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2

30、2单元高程3149.27315.19I9526.55627.16627.16 120.80 315.23II1839.81120.8092第23单元高程3146.27315.14I6871.38453.86548.85 113.51 315.28II1673.11109.5093高程3143.27314.98I9660.04644.86315.23II1790.15117.5494第24单元高程3140.27315.27I4060.46265.91492.46 118.70 315.06II1630.05108.2495高程3137.27315.57I11127.00714.64314.60I

31、I1890.66129.5096第25单元高程3134.27310.27I9438.72919.06919.06 141.46 315.34II2169.92141.4697第26单元高程3131.27315.09I5931.52393.08533.82 151.24 314.73II2171.45147.4298高程3128.27315.01I10136.50675.32315.02II2327.82154.9899第27单元高程3125.27314.55I3635.81249.88306.65 183.06 314.85II1302.0887.68100高程3122.27315.15I54

32、71.81361.18314.79II4123.71278.82101第28单元高程3119.27314.82I15415.671040.191040.19 155.16 314.97II2322.69155.16102第29单元高程3116.27314.57I4475.33307.16712.78 212.92 314.73II2240.13152.08103高程3113.27314.65I16352.121116.19314.63II4011.13274.17104第30单元0+271.857313.98I7383.49528.15317.60 173.32 313.84II4289.96

33、309.971050+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

34、.62534.59II7392.52213.721110+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单元0+294.13314.91I3332.60223.51682.40 194.91 314.93II1085.5

35、172.711160+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单元0+306.13315.24I3298.82216.46 729.33 240.23 315.05II1590.28105.67 1200+309.13315.13I17399.891150.03 315.52II5551.91357.73 12

36、10+312.13314.90I2960.58198.70 314.84II1984.13133.70 1220+315.13314.62I20020.201369.37 314.72II5318.78361.33 123第33单元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+327.1

37、3314.37I16240.331130.16 314.44II6357.38440.26 127第34单元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单元0+342.13

38、314.40I3285.01228.13 599.79 184.76 314.41II1738.17120.62 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单元0+354.13314.37I2986.36207.82 535.61 142.00 314.39II1130.4578.56 1360+3

39、57.13314.45I10061.76696.32 314.43II2999.19207.84 1370+360.13314.43I4084.64283.07 314.41II1051.7972.99 1380+363.13314.45I13771.97953.08 314.31II2988.98208.87 139第37单元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+372.13314.34I

40、3055.85213.10 314.35II1013.1570.60 1420+375.13314.30I6144.95429.72 314.31II2220.92155.20 143第38单元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

41、 314.25II2243.70157.45 147第39单元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单元0+402.13314.14I2490.06176.10 395.19

42、157.65 314.27II988.3769.26 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单元0+414.13314.29I3099.98216.93 297.83 133.53 314.18II955.6767.40 1560+417.13314.38I6973.84484.97 314.20II2

43、910.71204.98 1570+420.13314.15I2892.41204.41 314.21II1321.2592.98 1580+423.13314.31I4048.93282.94 314.24II2400.70168.59 159第42单元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+432.13314.19I3724.79262.49 314.22II1224.8786.14 16