水电工程岩质高陡边坡信息化施工案例分析

发布时间：2018-05-11 04:01

本文选题：信息化施工 + 岩体复核　；参考：《工程科学与技术》2017年04期

【摘要】：岩质高陡边坡的稳定性问题是水电工程关注的重点。如何有效识别控制高陡边坡稳定的关键因素,并对此进行针对性的支护设计与施工,以确保边坡的稳定,一直是难以有效解决的问题。基于此,以长河坝水电站进水口高陡边坡为依托,对水电工程岩质高陡边坡的设计与施工进行深入探讨,结合前期勘察结果分析了控制边坡稳定的关键因素,即J3、J7裂隙与其他结构面组合所引起的破坏,并依据地理位置分区设计了相应的开挖支护方案;伴随边坡施工,分部位分高程进行了岩体结构复核,发现边坡主要的破坏模式为滑塌(移)破坏、倾倒拉裂破坏、多条裂隙切割导致的岩体松动破碎所引起的破坏。以岩体等级为基础进行了边坡重分区,并以此进行了支护设计修正。讨论了控制边坡稳定的最关键因素即顺坡向J3裂隙,对比了前后期设计的差异及作用。监测数据分析表明,信息化施工对边坡稳定控制有效,边坡没有出现工程问题,已处于稳定状态。以期为类似工程提供参考。
[Abstract]:The stability of high-steep rock slope is the focus of hydropower engineering. How to effectively identify the key factors to control the stability of high and steep slope and how to design and construct the support to ensure the stability of the slope is always a difficult problem to be solved effectively. Based on this, based on the high and steep slope at the intake of Changheba Hydropower Station, the design and construction of the high and steep rock slope of hydropower project are discussed in depth, and the key factors to control the slope stability are analyzed in combination with the preliminary survey results. That is, the damage caused by the combination of J3 / J7 fissures and other structural planes, and the corresponding excavation and support schemes are designed according to the geographical location, and the rock mass structure is checked in different parts according to the construction of the slope. It is found that the main failure modes of the slope are collapse (displacement) failure, toppling and tensile fracture, and rock mass loosening and breaking caused by the cutting of multiple fractures. On the basis of rock mass grade, the slope rezoning is carried out, and the support design is modified. This paper discusses the key factor of controlling slope stability, that is, J3 fracture along slope direction, and compares the difference and function of the design between the former and the later stage. The analysis of monitoring data shows that the information construction is effective for slope stability control and the slope is in a stable state without engineering problems. In order to provide reference for similar projects.
【作者单位】：四川大学水力学与山区河流开发保护国家重点实验室水利水电学院;中国电建集团成都勘测设计研究院有限公司;
【基金】：国家重点基础研究发展规划资助项目(2010CB732005;2015CB057903) 国家重点研发计划资助项目(2016YFC0600702)
【分类号】：TV551.4-39

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