Abstract
Conventional grouting methods present challenges in achieving effective surface rock grouting and avoiding interference with concrete grouting and construction processes. The proposed approach includes reserving rock overburden, controlling grouting pressure and concentration, using a segmented grouting method, and selecting appropriate materials to develop a key method for consolidation grouting. This method not only overcomes the problems associated with the conventional consolidation grouting method but also effectively protects the thin layer of breccia lava in the Baihetan Dam foundation and solves the problem of unloading and relaxation of columnar jointed basalt caused by exposed consolidation grouting. The results show that the post grouting inspection hole permeability qualification rate is 99.3%, with the proportion of high-speed measuring points of various rock types ranging from 91.8% to 93.3%, and the proportion of low-speed measuring points ranging from 2.0% to 2.9%. The drop rate of the grout take of sequence I and sequence II is between 30%–60%, except for some dam sections. These results indicate that the proposed method for consolidation grouting meets the design requirements. The findings have significant implications for the design and construction of consolidation grouting in similar projects.
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References
Chen BR, Li QP, Feng XT, Xiao YX, Feng GL, Hu LX (2014) Microseismic monitoring of columnar jointed basalt fracture activity: A trial at the Baihetan Hydropower Station, China. Journal of Seismology 18(4):773–793, DOI: https://doi.org/10.1007/s10950-014-9445-0
Cui Z, Sheng Q, Leng X (2016) Control effect of a large geological discontinuity on the seismic response and stability of underground rock caverns: A case study of the baihetan #1 surge chamber. Rock Mechanics and Rock Engineering 49(6):2099–2114, DOI: https://doi.org/10.1007/s00603-015-0908-6
Dai F, Li B, Xu N, Meng G, Wu J, Fan Y (2017) Microseismic monitoring of the left bank slope at the baihetan hydropower station, China. Rock Mechanics and Rock Engineering 50(1):225–232, DOI: https://doi.org/10.1007/s00603-016-1050-9
Dou J, Zhang G, Zhou M, Wang Z, Gyatso N, Jiang MQ, Liu JQ (2020) Curtain grouting experiment in a dam foundation: Case study with the main focus on the Lugeon and grout take tests. Bulletin of Engineering Geology and the Environment, DOI: https://doi.org/10.1007/s10064-020-01865-0
Dou J, Zhou M, Wang Z, Wang K, Yuan S, Jiang M, Zhang G (2020) Case study: In situ experimental investigation on overburden consolidation grouting for columnar jointed basalt dam foundation. Geofluids 1–18, DOI: https://doi.org/10.1155/2020/1865326
Fan Q, Feng X, Weng W, Fan Y, Jiang Q (2017) Unloading performances and stabilizing practices for columnar jointed basalt: A case study of Baihetan hydropower station. Journal of Rock Mechanics and Geotechnical Engineering 9(6):1041–1053, DOI: https://doi.org/10.1016/j.jrmge.2017.07.003
Fan Q, Wang Z, Xu J, Zhou M, Jiang Q, Li G (2018) Study on deformation and control measures of columnar jointed basalt for baihetan superhigh arch dam foundation. Rock Mechanics and Rock Engineering 51(8):2569–2595, DOI: https://doi.org/10.1007/s00603-017-1378-9
Fan QX, Zhou XW, Li BF (2012) Key technologies of rock engineering for construction of Xiluodu super high arch dam. Journal of Rock Mechanics and Engineering 31(10):1998–2015
Fan Q, Zhou S, Yang N (2015) Optimization design of foundation excavation for Xiluodu super-high arch dam in China. Journal of Rock Mechanics and Geotechnical Engineering 7(2):120–135, DOI: https://doi.org/10.1016/j.jrmge.2015.03.001
Hao XJ, Feng XT, Yang CX, Jiang Q, Li SJ (2016) Analysis of EDZ development of columnar jointed rock mass in the baihetan diversion tunnel. Rock Mechanics and Rock Engineering 49(4):1289–1312, DOI: https://doi.org/10.1007/s00603-015-0829-4
Jiang Q, Feng Xt, Hatzor YH, Hao Xj, Li Sj (2014) Mechanical anisotropy of columnar jointed basalts: An example from the Baihetan hydropower station, China. Engineering Geology 175:35–45, DOI: https://doi.org/10.1016/j.enggeo.2014.03.019
Lin P, Shi J, Wei P, Fan Q, Wang Z (2019) Shallow unloading deformation analysis on Baihetan super-high arch dam foundation. Bulletin of Engineering Geology and the Environment 78(8):5551–5568, DOI: https://doi.org/10.1007/s10064-019-01484-4
Lin P, Zhou W, Liu H (2015) Experimental study on cracking, reinforcement, and overall stability of the xiaowan super-high arch dam. Rock Mechanics and Rock Engineering 48(2):819–841, DOI: https://doi.org/10.1007/s00603-014-0593-x
Lin P, Zhu X, Li Q, Liu H, Yu Y (2016) Study on optimal grouting timing for controlling uplift deformation of a super high arch dam. Rock Mechanics and Rock Engineering 49(1):115–142, DOI: https://doi.org/10.1007/s00603-015-0732-z
Meng G, Fan Y, Jiang Y, He W, Pan Y, Li Y (2016) Key rock mechanical problems and measures for huge caverns of Baihetan hydropower plant. Chinese Journal of Rock Mechanics and Engineering 35(12): 2549–2560 (in Chinese)
Shi A, Wei Y Wu J, Ren D, Tang M (2020a) Study on the shear deformation of intralayer shear bands at the Baihetan hydropower station dam foundation. Bulletin of Engineering Geology and the Environment 79(7):3517–3532, DOI: https://doi.org/10.1007/s10064-020-01799-7
Shi A, Wei Y Zhang Y Tang M (2020b) Study on the strength characteristics of columnar jointed basalt with a true triaxial apparatus at the baihetan hydropower station. Rock Mechanics and Rock Engineering, DOI: https://doi.org/10.1007/s00603-020-02195-z
Wang W, Ding J, Wang G, Zou L, Chen S (2011) Stability analysis of the temperature cracks in Xiaowan arch dam. Science China Technological Sciences 54(3):547–555, DOI: https://doi.org/10.1007/s11431-010-4280-1
Xia Y, Zhang C, Zhou H, Chen J, Gao Y, Liu N, Chen P (2020) Structural characteristics of columnar jointed basalt in drainage tunnel of Baihetan hydropower station and its influence on the behavior of P-wave anisotropy. Engineering Geology 264:105304, DOI: https://doi.org/10.1016/j.enggeo.2019.105304
Xiao YX, Feng XT, Feng GL, Liu HJ, Jiang Q, Qiu SL (2016) Mechanism of evolution of stress-structure controlled collapse of surrounding rock in caverns: A case study from the Baihetan hydropower station in China. Tunnelling and Underground Space Method 51:56–67, DOI: https://doi.org/10.1016/j.tust.2015.10.020
Xu NW, Tang CA, Li LC, Zhou Z, Sha C, Liang ZZ, Yang JY (2011) Microseismic monitoring and stability analysis of the left bank slope in Jinping first stage hydropower station in southwestern China. International Journal of Rock Mechanics and Mining Sciences 48(6):950–963, DOI: https://doi.org/10.1016/j.ijrmms.2011.06.009
Xu N, Wu J, Dai F, Fan Y, Li T, Li B (2018) Comprehensive evaluation of the stability of the left-bank slope at the Baihetan hydropower station in southwest China. Bulletin of Engineering Geology and the Environment 77(4):1567–1588, DOI: https://doi.org/10.1007/s10064-017-1018-3
Yan Dx, Xu Wy, Zheng Wt, Wang W, Shi Ac, Wu Gy (2011) Mechanical characteristics of columnar jointed rock at dam base of Baihetan hydropower station. Journal of Central South University of Method 18(6):2157–2162, DOI: https://doi.org/10.1007/s11771-011-0957-2
Yang J, Jin F, Wang JT, Kou LH (2017) System identification and modal analysis of an arch dam based on earthquake response records. Soil Dynamics and Earthquake Engineering 92:109–121, DOI: https://doi.org/10.1016/j.soildyn.2016.09.039
Zhang D, Wang G, Yang T, Zhang M, Chen S, Zhang F (2013) Satellite remote sensing-based detection of the deformation of a reservoir bank slope in Laxiwa Hydropower Station, China. Landslides 10(2):231–238, DOI: https://doi.org/10.1007/s10346-012-0378-9
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This study was supported by the China Power Construction Corporation Enterprise Project (2019–1102).
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Dou, J., Yang, X., Gong, P. et al. Case Study on the Method of Rock Mass Overburden Consolidation Grouting for Dam Foundation. KSCE J Civ Eng 27, 4240–4249 (2023). https://doi.org/10.1007/s12205-023-0540-z
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DOI: https://doi.org/10.1007/s12205-023-0540-z