巴基斯坦N-J水电站地下厂房边墙变形分析

详细信息    查看全文 | 推荐本文 |

英文篇名：Deformation and analysis of side wall of underground powerhouse of N-J Hydropower Station in Pakistan 作者：陆宗磐 ; 陈洪莲 英文作者：LU Zongpan;CHEN Honglian;China Water Resources Beifang Investigation, Design & Research Co., Ltd.; 关键词：地下厂房 ; 边墙变形 ; N-J水电站 英文关键词：underground powerhouse;;deformation of side wall;;N-J Hydropower Station 中文刊名：人民长江 英文刊名：Yangtze River 机构：中水北方勘测设计研究有限责任公司; 出版日期：2019-04-28 出版单位：人民长江 年：2019 期：04 语种：中文; 页：161-166 页数：6 CN：42-1202/TV ISSN：1001-4179 分类号：TV738

摘要

巴基斯坦N-J水电站地下厂房围岩岩性为软硬相间的砂岩与泥(页)岩,围岩类别以Q4为主,且节理裂隙发育;尾水闸门操作室设在主厂房内,局部形成大跨度的洞室,施工开挖过程中下游边墙产生较大的变形。经分析,厂房布置不合理是变形大的主要原因,而地质条件差则是控制因素,加剧了变形的发展。通过调整开挖次序和增强支护措施,围岩已趋于稳定。
        The rock lithology for the underground powerhouse of N-J hydroelectric project in Pakistan is alternated beds of sandstone and mudstone (shale). The surrounding rock is mainly classified as Q4 with developed joint fissures. Tailrace gate chambers are located inside the main powerhouse cavern that locally forms a large-span underground cavern. Large deformation occurred on downstream wall during the excavation of the main cavern. Through analysis, it is concluded that the main cause of large deformation is unreasonable powerhouse arrangement, and the poor geological conditions are control factors intensifying the development of deformation. By adjusting the excavation sequence and enhancing the rock supporting measures, the surrounding rock mass has tended to be stable.

引文

[1] 水工设计手册(第2版)第8卷水电站建筑物第5章水电站厂房[M].北京:中国水利水电出版社,2013.
    [2] Neelum Jhelum Consultants.Report on Geological Mapping along The Tunnel Alignment (Pakage-1)[R].Muzaffarabad:Neelum Jhelum Consultants,2012.
    [3] 彭土标.水力发电工程地质手册[M].北京:中国水利水电出版社,2011.
    [4] 董志宏,丁秀丽,张风,等.大型地下厂房施工期围岩变形监测成果分析[J].岩土力学,2006,27(S2):637-642.
    [5] 傅萌,陈华,胡昆.糯扎渡地下厂房开挖围岩变形及支护应力监测[J].人民长江,2012,43(4):80-94.
    [6] 周旭飞,单海年,潘琳.溧阳抽水蓄能工程地下厂房开挖过程性态分析[J].水力发电,2013,39(3):50-52.
    [7] SL266-2001水电站厂房设计规范[S].北京:中国水利水电出版社,2001.
    [8] SL337-2007水利水电工程喷锚支护设计规范[S].北京:中国水利水电出版社,2007.
    [9] DL/T5176-2003水电工程预应力锚固设计规范[S].北京:中国水利水电出版社,2003.
    [10] 陈国庆,冯夏庭.考虑岩体劣化的大型地下厂房围岩变形动态监测预警方法研究[J].岩土力学,2010,31(9):3012-3018.
    [11] 魏进兵,邓建辉.锦屏一级水电站地下厂房围岩变形与破坏特征分析[J].岩石力学与工程学报,2010,29(6):1198-1204.
    [12] 朱维申,孙爱花.大型洞室群高边墙位移预测和围岩稳定性判别方法[J].岩石力学与工程学报,2007,26(10):1729-1739.