山西西龙池抽水蓄能电站地下厂房围岩位移应力特性及原因分析
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摘要
西龙池抽水蓄能电站位于山西省五台县境内,总装机容量为1 200 MW,额定发电水头640 m。地下厂房开挖尺寸(长×宽×高)为149.3 m×23.5 m×49.0 m。厂区岩性为泥质鲕状灰岩、薄层条带状灰岩、薄层石英粉砂岩,近水平产状;厂房轴线与主要断层、裂隙成大角度相交。地下厂房围岩位移、锚杆应力呈明显各向异性特点,且边墙围岩位移平均值为3.0 mm、锚杆应力平均值为45 MPa,均较小,构成了近水平薄层灰岩、粉砂岩互层岩体内地下厂房围岩位移、应力特点。
The Xilongchi pumped storage power station,located in Wutai county,Shanxi province,has total installed capacity of 1 200 MW with a rated generating head of 640 m.The three dimensions of its powerhouse are 149.3 m,23.5 m and 49.0 m.The strata in the powerhouse area are composed of argillaceous oolitic limestone,thin banded limestone and thin quartz siltstone with almost horizontal occurrence.The axis of the powerhouse intersects the main faults and fissures with large angles.Displacement and anchor bar stress of the surrounding rock are characterized by obvious anisotropy,and the surrounding rock displacement(mean 3.0 mm) and the anchor bar stress(mean 45 MPa) are relatively small.
The Xilongchi pumped storage power station,located in Wutai county,Shanxi province,has total installed capacity of 1 200 MW with a rated generating head of 640 m.The three dimensions of its powerhouse are 149.3 m,23.5 m and 49.0 m.The strata in the powerhouse area are composed of argillaceous oolitic limestone,thin banded limestone and thin quartz siltstone with almost horizontal occurrence.The axis of the powerhouse intersects the main faults and fissures with large angles.Displacement and anchor bar stress of the surrounding rock are characterized by obvious anisotropy,and the surrounding rock displacement(mean 3.0 mm) and the anchor bar stress(mean 45 MPa) are relatively small.
引文
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[4]王连捷,齐俊修,张利荣,等.隧洞位移反分析及其在十三陵电站工程中的应用[C]//地质力学与地壳运动.北京:地震出版社,1997:28-36.
[2]余烂.隧道量测位移的反分析[J].隧道译丛,1986(4):8-12.
[3]杨志法,王思敬,冯紫良,等.岩土工程分析原理及应用[M].北京:地震出版社,2002:86-89.
[4]王连捷,齐俊修,张利荣,等.隧洞位移反分析及其在十三陵电站工程中的应用[C]//地质力学与地壳运动.北京:地震出版社,1997:28-36.
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