某大型地下泵房围岩块体组合模式分析
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摘要
大型地下洞室在施工过程中,围岩稳定问题是最主要的工程地质问题之一,以裂隙硬质岩体为主的洞室工程,围岩稳定问题中以块体稳定问题最为典型,块体组合模式更是此类问题分析的关键所在。本文选取滇中引水工程石鼓水源地下泵房为研究题材,主要通过地表测绘及钻孔揭露结构面发育特征等,结合关键块体理论及立体几何学基本理论,从块体空间几何构成结合变形破坏方式,初步归纳出地下泵房部位块体模式主要有:(1)滑塌失稳;(2)坍顶、掉块两种基本破坏模式,以及单滑面型楔体、双滑面型楔体、正锥型楔体、斜锥型楔体及单缓切面薄版型等5种典型的基本单体和组合块体模型。从宏观上对泵房区块体组合进行了初步预判,为围岩稳定综合评价奠定了基础,可为其它工程相类似的裂隙硬质岩体洞室块体组合分析提供参考意义。
In the process of construction of large underground cavern, surrounding rock stability is one of the major engineering geological problem in fissure cavern engineering, hard rock based on block stability problems, the most typical in the stability of surrounding rock, block combination model is the key to this kind of problem analysis. This paper selects the Shigu water diversion project in Yunnan underground pumping station as the research subject, mainly through the surface mapping and drilling structural surface development characteristics, combined with the basic theory of key block theory and solid geometry, from the composition of block space geometry with deformation and failure modes, summarizes parts of underground pumping station block pattern mainly has: the slump the collapse of roof instability; and block out two basic failure modes, and a single slip surface type wedge, wedge type double surface, cone wedge, oblique cone wedge and slow section thin version type 5 kinds of typical basic monomer and combination block model. The preliminary prediction of the block combination in the pump room is made from macroscopic view, which lays the foundation for the comprehensive evaluation of the surrounding rock stability. It can provide a reference for other engineering similar fractured hard rock cavern block combination analysis.
In the process of construction of large underground cavern, surrounding rock stability is one of the major engineering geological problem in fissure cavern engineering, hard rock based on block stability problems, the most typical in the stability of surrounding rock, block combination model is the key to this kind of problem analysis. This paper selects the Shigu water diversion project in Yunnan underground pumping station as the research subject, mainly through the surface mapping and drilling structural surface development characteristics, combined with the basic theory of key block theory and solid geometry, from the composition of block space geometry with deformation and failure modes, summarizes parts of underground pumping station block pattern mainly has: the slump the collapse of roof instability; and block out two basic failure modes, and a single slip surface type wedge, wedge type double surface, cone wedge, oblique cone wedge and slow section thin version type 5 kinds of typical basic monomer and combination block model. The preliminary prediction of the block combination in the pump room is made from macroscopic view, which lays the foundation for the comprehensive evaluation of the surrounding rock stability. It can provide a reference for other engineering similar fractured hard rock cavern block combination analysis.
引文
[1]王家祥,叶圣生,周质荣等.三峡地下电站主厂房顶拱块体模式及加固对策[J].人民长江,2007,38(9):63-68.
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[6]巨能攀.大跨度高边墙地下洞室群围岩稳定性评价及支护方案的系统工程地质研究-以糯扎渡水电站为例[D].成都:成都理工大学,2005.
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[9]王明华,杨良策,刘汉超等.大型地下洞室顶板稳定性的岩体结构控制效应[J].岩土力学,2003,24(3):484-487.
[10]张奇华,邬爱清,石根华.关键块体理论在百色水利枢纽地下厂房岩体稳定性分析中的应用[J].岩石力学与工程学报,2004,23(15):2609-2614.
[11]刘锦华,吕祖珩.块体理论在工程岩体中的应用[M].北京:水利出版社,1988.
[12]王思敬,杨志法,刘竹华.地下工程岩体稳定分析[M].北京:科学出版社,1984.
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[14]张倬元,王士天,王兰生,黄润秋等.工程地质分析原理[M].北京:地质出版社,2009.
[15]李红旭,盛谦,张勇慧,朱付广.某水电站地下厂房关键块体稳定性分析[J].人民长江,2011,42(2):42-46.
[2]崔银祥,聂德新.某电站大型地下洞室群主变洞确定性块体的稳定性评价[J].工程地质学报,2005,2.
[3]盛谦,黄正加,邬爱清.三峡工程地下厂房随机块体稳定性分析[J].岩土力学,2002,23(6):747-750.
[4]黄正加,周述达.三峡洞室围岩定位块体稳定性分析[J].矿山压力与顶板管理,2005,4(3):75-79.
[5]黄正加,邬爱清,盛谦.块体理论在三峡工程中的应用[J].岩石力学与工程学报,2001,20(5):648-652.
[6]巨能攀.大跨度高边墙地下洞室群围岩稳定性评价及支护方案的系统工程地质研究-以糯扎渡水电站为例[D].成都:成都理工大学,2005.
[7]张子新,孙钧.块体理论赤平解析法及其在硐室稳定分析中的应用[J].岩石力学与工程学报,2002,21(12):1756-1760.
[8]毛海和,夏才初,张子新等.块体理论赤平解析法在龙滩水电站地下厂房洞室群稳定性分析中的应用[J].岩石力学与工程学报,2004,24(8):1308-1314.
[9]王明华,杨良策,刘汉超等.大型地下洞室顶板稳定性的岩体结构控制效应[J].岩土力学,2003,24(3):484-487.
[10]张奇华,邬爱清,石根华.关键块体理论在百色水利枢纽地下厂房岩体稳定性分析中的应用[J].岩石力学与工程学报,2004,23(15):2609-2614.
[11]刘锦华,吕祖珩.块体理论在工程岩体中的应用[M].北京:水利出版社,1988.
[12]王思敬,杨志法,刘竹华.地下工程岩体稳定分析[M].北京:科学出版社,1984.
[13]周维垣.高等岩石力学[M].北京:水利水电出版社,1990.
[14]张倬元,王士天,王兰生,黄润秋等.工程地质分析原理[M].北京:地质出版社,2009.
[15]李红旭,盛谦,张勇慧,朱付广.某水电站地下厂房关键块体稳定性分析[J].人民长江,2011,42(2):42-46.