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1、1大坝变形监测仪器布置大坝内部共布置8套垂直水平位移计监测条带，分别位于378m高程（1条）、403.5m 高程（1条）、425m高程（3条）、455m高程（3条）。垂直水平位移计包括水管式沉降仪 和引张线式水平位移计。大坝翠云体史捋监淋木置图倾、皿50*至本月为止，董箐水电站已埋设5套（378m、403.5m、425m）垂直水平位移计条带。位于424m高程以下的有2套：坝右0-22.5m，EL.378m条带：水管式沉降仪VM1_110引张线式水平位移计HM1-16；坝右0-22.5m，EL.403.5m条带：水管式沉降仪VM2-18、引张线式水平位移计HM2-14。425m高程的3套垂直水平
2、位移计条带根据主体工程的施工进度，于近期埋设完成， 2007年12月底前测取初值。另外，在大坝上游坡面424m高程设置临时垂直位移监测墩7个，用于监测堆石体上 游面的沉降变形情况。监测墩布置：424m高程坝体上游垫层料区，左岸至右岸的总距离 约420m，在垫层料区等间距布置了 7个垂直位移监测墩ISL1-1ISL1-7,各个监测墩的墩 顶高程接近。监测墩埋设位置示意图如下：2坝体沉降变形监测资料整编分析2.1大坝上游面424m高程临时垂直位移监测监测方法及精度：使用莱卡2003测量机器人，采用三角高程测量法，在平面监测时 可以把测水平角、垂直角和测距同时进行，一次性完成平高监测，监测精度可达到
3、3mm 以内。平面控制点II-16处于稳固的地面上，建立时间长，沉降变形小，可选择施工网控制 点II-16作为高程起算点。监测成果：临时垂直位移监测墩于10月29日开始测取初值，每周监测12次，至2008 年1月16日总共已监测17次，沉降监测成果见如下:EL.424m临时视准线监测大坝沉降分布表（单位:mm）日期ISL1-7ist16L1-6ISL1-5ISL1-4ISL1-3ISL1-2ISL1-1填筑高 程0+138.500+85.000+30.400-22.500-82.200-141.000-201.752007-10-290.00.00.00.00.00.00.0424.52007
4、-11-2-2.80.9-6.82.83.30.61.3425.22007-11-8-3.21.7-4.218.99.75.70.4426.02007-11-11-4.8-0.9-5.816.214.66.44.6426.32007-11-21-3.110.410.430.617.212.14.5427.52007-11-28-8.05.49.325.412.75.6-5.0428.02007-12-63.928.137.155.531.316.83.7431.02007-12-120.027.336.863.444.824.98.1432.02007-12-23坝面碾压 损坏坝面碾 压损坏3
5、5.268.751.326.65.8433.02007-12-2745.277.065.229.45.2434.02007-12-3157.083.066.437.93.3434.02008-1-455.286.770.338.54.2434.82008-1-856.589.674.539.32.4436.72008-1-16坝面碾 压损坏96.081.144.66.6438.508年1月半月沉降量-0.513.014.66.83.3EL.424m坝体上游垫层料区沉降变化过程线08-1-17日期100ISL1-7-ISLl-6ISL1 -3ISLl -2ISL1-5ISL11JISL1-41埴
6、筑高程07-10-29 07-11-8 07-11-18 07-11-28 07-12-8 07-12-18 07-12-2808-1-7439435431427423419由沉降分布曲线可知：10月29日至1月16日大坝上游坡最大沉降量为96mm （坝 右0-22.5m）。2008年1月半个月最大沉降量14.6mm。填筑高度上升，坝体沉降增加，随着 时间推移，堆石徐变变形堆石体沉降增加，坝体上游坡面沉降变形可能将继续增大。左、右岸沉降量相对较小。2.2 EL403.5m高程垂直水平位移计监测（1）水管式沉降仪EL.403.5m高程条带共布置8个沉降测点，度汛断面内的测点VM2-1- VM2-
7、3先埋， 于6月16日取初值；下游的测点VM2-4- VM2-8后埋，于10月10日取初值。至1月16 日，实测最大沉降量405mm （纵下0-39m、沉降测点VM2-6）；2008年1月内半月最大沉降79.5mm，同一时间段内EL.403.5m永久监测房沉降增加 19.7mm，大坝填筑上升4.6m。403.5m高程沉降仪监测成果表（mm）永久监测房沉降量（mm）临时监测房沉降量（mm）时间VM2-1VM2-2VM2-3VM2-4VM2-5VM2-6VM2-7VM2-80-1470+44.60+122.630+95.90+54.70+220-4.50-390-690-1112007-6-17-
8、1.07.06.010.02007-7-322.757.529.325.02007-7-3125.472.535.928.02007-8-1627.180.939.534.02007-9-1040.089.560.556.02007-9-1838.585.166.566.02007-10-1038.585.166.50.00.00.00.00.00.02007-10-1870.2128.990.264.975.377.42007-10-2744.2101.6109.6107.979.089.42007-11-1445.6123.0167.2112.5149.5171.52007-11-2167
9、.9154.6189.4161.9163.6197.22007-12-555.6146.2230.1179.6175.5232.62007-12-13 2007-12-18 2007-12-282007- 12-31 2008-1-72008- 1-132008-1-1739.3 61 57.3 54.340.4 46.3 574141.3168.7167.7164.3158.4152.3168.5263.8281.3297.2320.8328.0337.8362.6204.0225.3242.1242.0261.1279.0303.8246.4250.2282.4323.4366.5381.
10、4402.9278.4291.1323.4337.4352.5377.4405.02008年1月沉降3.14.241.861.879.567.621.751.864.741.764.873.763.5141.6138.9159.7152.679.4204.1186.694.642.745.819.7243.2253.3273.2306.2330.8350.2348.9211.0228.2237.7247.0263.9268.0292.8107.8110.6114.8118.8124.9127.8138.5董箐水电站大坝变形监测初步分析报告水顾问集团贵阳勘测设计研究院董箐电站监测项目部（2）引张
11、线式水平位移计403.5m高程水平位移计水平位移监测成果表（cm）时间HM2-1HM2-2HM2-3HM2-40+156.40+126.20-4.50-692007-6-170.150.012007-7-161.280.072007-7-311.140.012007-8-160.91-0.052007-9-16-0.68-0.712007-10-18-5.14-4.72-0.62-0.622007-10-27-14.02-4.801.450.672007-11-21-23.00-6.560.051.192007-12-5-25.01-5.761.66-0.322007-12-18-26.24-
12、6.27-0.391.262007-12-28-21.49-5.701.612.502007-12-31-19.32-4.830.493.362008-1-7-17.52-3.351.763.842008-1-17-20.93-3.620.173.25注：“-”表示向上游位移，“+”表示向下游位移。由水平位移计成果表可知，HM2-1、HM2-2测点向上游位移趋势明显，至1月17 日，向上游最大位移20.93cm，坝轴线及下游的测点HM2-3、HM2-4的水位移表现为向下游 的趋势，位移量较小，并且HM2-3测点的规律性差。4.3 EL378m高程水管式沉降仪监测（1）水管式沉降仪EL.378m
13、高程水管式沉降仪共布置10个沉降测点，VM1-1VM1-5测点位移坝轴线上游 坝体内，Vm1-6Vm1-10位移坝轴线下游坝体内EL.378m高程水管式沉降仪于6月1日取初 值，至1月17日实测最大沉降量已达605mm（VM1-6、纵下0-69m）；度汛断面内埋设的5个测点VM1-1Vm1-5（纵上0+156.40+22）的累积沉降范围76.7 mm 397mm；下游坝内埋设的5个测点Vm1-6VM1-10 （纵下0-4.5m0-111m）的累积沉降量范围498 mm 605mm；下游坝体沉降明显大于上游坝体沉降量。至1月17日，EL.378m永久监测房沉降135mm，1月内沉降0.5mm。E
14、L.378m高程沉降仪监测成果表(mm)(沉降量=测点沉降+监测房沉降)日期VM1-1VM1-2VM1-3VM1-4VM15VM16VM17VM18VM19VM1-1 0永久监测房0+156.40+126.20+095.90+054.70+0220-004.50-0390-0690-1110-1520-210.52007-6-1000000000002007-6-1715.746.065.758.527.413.820.817.77.613.523.02007-7-1660.990.4143.9131.475.659.651.356.934.854.238.02007-7-31110.363.
15、3195.8178.6130.0152.0183.3149.1118.9167.468.02007-8-29135.867.9219.5206.5174.8244.2253.5287.4179.6277.0100.02007-9-19144.342.7231.8225.6223.2334.0398.3370.7318.5354.7118.02007-9-30150.1100.0202.8242.8251.5377.0398.8426.5378.9360.9119.02007-10-18148.798.0247.0261.1281.7414.4435.8455.7441.5395.6114.02
16、007-10-27149.2107.3260.7279.3318.2428.9440.6471.6458.9416.7117.62007-11-13124.593.2240.7271.7324.5467.3490.0470.4457.8389.7119.72007-11-21106.274.5228.2265.4325.6475.4495.6474.7464.2395.5120.02007-12-5108.294.8239.1286.7346.8515.9486.6524.5516.3416.1128.32007-12-13107.4105.2243.3308.1367.0539.4516.0
17、509.0511.1417.8132.72007-12-18111.086.7250.0307.0377.2559.5520.7508.3526.0437.2135.42007-12-28111.367.5258.0315.6391.1575.7523.3577.4528.8465.6133.02007-12-31113.458.2258.3317.1394.0579.3514.0588.4533.5466.5134.72008-1-7113.763.9220.6287.1369.3582.6538.4603.6570.9481.5134.12008-1-14111.366.1245.3306
18、.4395.9588.0553.9689.3583.6490.1134.62007-1-17112.676.7265.2329.4397.5597.8572.5605.2584.0498.0135.208年1月沉降 量-0.7518.556.9512.353.5518.5558.5516.8550.5531.550.55378m高程V M1-1 10坝体沉降位移分布曲线16012080400-40-80-120-160-200-240桩号一200.0=0.0400.0降沉600.0800.02007-6-172007-9-192007-12-5 2007-7-32007-9-30* 2007-
19、12-132007-7-162007-7-312007-10-18 -曰- - 2007-10-272007-12-182007-12-282007-8-29看2007-11-21* 2007-12-311000.01200.0(2)引张线式水平位移计EL.378m高程水平位移计监测成果显示，坝轴线上游测点有向上游位移的趋势，坝轴 线下游测点水平位移较小，并表现为向下游位移的趋势。上游测点向上游实测最大位移 8.99cm，下游坝体沉降量较小。HM1-6传感器测值不稳，11月13日更换传感器。EL.378m高程水平位移计水平位移监测成果表(cm)时间HM1-1HM1-2HM1-3HM1-4HM1
20、-5HM1-60+156.40+126.20+054.70-004.50-069.00-152.02007-6-29-1.020.140.191.120.12-2007-7-21-2.89-0.730.301.310.09-2007-8-16-4.68-1.90.341.430.13-2007-8-29-4.20-2.110.261.410.10-2007-9-19-5.09-2.160.081.300.11-2007-9-30-5.72-2.170.031.310.16-2007-10-10-5.72-2.39-0.1921.240.17-2007-10-27-6.03-3.34-1.001.080.15-2007-11-13-5.60-3.42-1.591.160.30-2007-11-21-6.42-3.75-1.871.130.322.792007-12-28-8.26-5.61-3.291.230.743.742007-12-31-8.48-6.31-3.391.320.923.822008-1-7-8.60-6.78-3.481.391.063.912008-1-13-8.86-6.80-3.741.346.594.492008-1-17-8.99-5.99-4.111.331.724.64注：“-”表示向上游位移，“+”表示向下游位移
