Consolidation grouting methods for riverbed rock mass coverings of complex dam foundations

被引：0
|
作者：
Luo G. [1 ]
Wang K. [1 ]
Guo Z. [1 ]
Tan Y. [1 ]
Awang J. [1 ]
机构：
[1] China Three Gorges Projects Development Co., Ltd., Chengdu
来源：
Qinghua Daxue Xuebao/Journal of Tsinghua University | 2020年 / 60卷 / 07期
关键词：
Baihetan Hydropower Station; Complex geological conditions; Dam foundation; Rock mass cover;
D O I：
10.16511/j.cnki.qhdxxb.2020.26.010
中图分类号：
学科分类号：
摘要：
Effective surface rock grouting and effective coupling between the concrete-cover grouting and concrete construction are difficult problems, especially with complex geological conditions. This study analyzed the complex geological conditions of the Baihetan dam foundation to develop a consolidation grouting method using the reserved rock mass cover weight, a low pressure thick slurry seal and consolidation grouting by the cover weight by controlling various parameters including the reserved rock mass cover weight, the grouting pressure and concentration, and the grouting method and materials. This method not only avoids the problems of conventional consolidation grouting methods, but also protects the crane beach dam foundation thin layer breccia lava and stabilizes the basalt columnar joints by consolidation grouting bare unloading relaxation. The practice of the riverbed dam section of the Baihetan dam engineering showed that the pass rate of the permeability rate of inspection holes is 99.3%, the high wave velocity of all kinds of lithology measuring point was 91.8%-93.3%, and the low wave velocity measuring point accounted for 2.0%-2.9%, which met the overall design requirements. The results can be applied to the design of consolidation grouting methods in similar projects. © 2020, Tsinghua University Press. All right reserved.
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页码：575 / 581
页数：6
相关论文
共 16 条
  • [1] LI Z, CHEN F, ZHENG J B, Et al., Analysis and key problems of super high arch dam hub, (2004)
  • [2] LIN P, ZHU X, LI Q, Et al., Study on optimal grouting timing for controlling uplift deformation of a super high arch dam, Rock Mechanics and Rock Engineering, 49, 1, pp. 115-142, (2016)
  • [3] Foundations for dams, (1974)
  • [4] LIN P, ZHOU W Y, LIU H Y., Experimental study on cracking, reinforcement, and overall stability of the Xiaowan super-high arch dam, Rock Mechanics and Rock Engineering, 48, 2, pp. 819-841, (2015)
  • [5] FAN Q X, ZHOU X W, LI B F., Key technologies of rock engineering for construction of Xiluodu super-high arch dam, Journal of Rock Mechanics and Engineering, 31, 10, pp. 1998-2015, (2012)
  • [6] WANG Z K, LIN P., Analysis and evaluation of optimizing design for foundation excavation of Xiluodu super-high arch dam, Journal of Rock Mechanics and Engineering, 27, 10, pp. 2010-2018, (2008)
  • [7] LIN P, KANG S Z, LI Q B, Et al., Evaluation of rock mass quality and stability analysis of Xiluodu arch dam under construction phase, Journal of Rock Mechanics and Engineering, 31, 10, pp. 2042-2052, (2012)
  • [8] CHEN C J, AN X H, JIN F, Et al., Development and application of self-folwing controlled grouting, Journal of Tsinghua University (Science and Technology), 54, 8, pp. 1013-1017, (2014)
  • [9] ZHANG J Q, LIU G., Construction and quality control of consolidation grouting of Ertan arch dam foundation, Design of Hydroelectric Power Station, 23, 2, pp. 88-92, (2007)
  • [10] BAI J G, LI P J, WU Z G, Et al., Key technologies in the construction of Laxiwa Hydropower Station, Water Power, 35, 11, pp. 10-11, (2009)
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