院报 ›› 2015, Vol. 32 ›› Issue (9): 123-127.DOI: 10.11988/ckyyb.20150017

• 岩土工程 • 上一篇    下一篇

综合加固处理技术在锦屏高拱坝左岸坝基中的应用

李正兵1,2,张立展1   

  1. 1.成都理工大学 地质灾害防治与地质环境保护国家重点实验室,成都 610059;
    2.中国水利水电第七工程局 成都水电建设工程有限公司,成都 611130
  • 收稿日期:2015-01-08 出版日期:2015-09-20 发布日期:2015-09-10
  • 作者简介:李正兵(1974—),男,四川双流人,高级工程师,博士研究生,主要从事地基和基础工程的技术与管理工作,(电话)028-82650187(电子信箱)472523124@qq.com。

Comprehensive Reinforcement Technologies Applied to the Treatment of the Left Bank of Jinping High Arch Dam

LI Zheng-bing1,2, ZHANG Li-zhan1   

  1. 1. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China;
    2. Chengdu Hydropower Construction Company of Sinohydro Bureau 7th Co., Ltd., Chengdu 611130, China
  • Received:2015-01-08 Online:2015-09-20 Published:2015-09-10

摘要: 锦屏一级水电站大坝基础地质条件复杂,尤其以左岸f5断层为代表的软弱岩体,断层规模大、岩体性状差,是影响拱坝渗流稳定、抗滑稳定和变形稳定最为关键的因素之一,因而f5断层处理效果的好坏直接决定了锦屏一级水电站高拱坝能否长期安全运营。为此,对锦屏一级水电站高拱坝左岸坝基范围内的f5断层处理技术进行了探索和研究,介绍了开挖置换、预应力锚固、高压固结灌浆、水泥-化学复合灌浆及高压水对穿冲洗回填砼等处理措施,并对处理效果进行了分析和评价。监测成果表明,以上综合加固处理措施达到了预期的效果,可为类似工程提供参考和借鉴。

关键词: 锦屏高拱坝, f5断层软弱带, 坝基稳定性, 加固, 处理技术

Abstract: The arch dam of Jinping first-stage hydropower station had complex geological conditions of dam foundation. Fault f5 in the left bank, a typical large-scale weak rock mass with poor rock properties, is a crucial factor affecting the dam’s seepage stability, anti-sliding stability and deformation stability. The reinforcement effect determines directly whether the dam could work safely in the long run. In the present paper we explored and introduced the technologies of reinforcing the fault, including excavation-displacement, prestressed anchorage, high pressure consolidation grouting, cement-chemical compound grouting and the technique of “two-ended high pressure washing then backfilling with concrete”. Also we analyzed and evaluated the reinforcement effect. Monitoring data suggest that these reinforcement measures have worked as expected, shortened construction period, saved cost, and compared with single measure, these comprehensive measures met the requirements of seepage stability, anti-sliding stability and deformation stability, and can be taken as references for similar engineering.

Key words: Jinping high arch dam, fault f5, stability of dam foundation, reinforcement, treatment technology

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