贵州北盘江大桥高边坡特征及其工程效应研究
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摘要
高山峡谷地区的北盘江大桥两岸高边坡,表部风化卸荷严重。因此,对其稳定性及危害程度进行准确评价显得尤为重要。首先,对两岸边坡的结构类型、结构面与坡面的组合、岩体风化及物理力学性质等特征进行了研究;然后,对两岸边坡的岩体进行了质量分级;在岩体质量分级的基础上,利用FLAC3D数值模拟软件,对两岸边坡在自重、大桥荷载和地震作用下引起的工程效应进行了综合评价。
The high slopes along the two banks of Beipanjiang Bridge in mountainous canyon were severely weathered,so it was rather important to evaluate the characteristics of stability and hazard degree accurately.Firstly,the authors studied the characteristics of the high slope on both banks,such as structure type,combination between structure plane and slope surface,rock mass weathering and the physical and mechanical properties.Then,the classification was given to rock mass,and based on rock mass quality classification,stability and potential engineering effect from gravity,bridge load and earthquake were synthetically evaluated by way of FLAC3D(Fast Lagrangian Analysis of Continua in 3 Dimensions) numerical simulation software.Finally,it is concluded that the site was adapted to building bridge.
The high slopes along the two banks of Beipanjiang Bridge in mountainous canyon were severely weathered,so it was rather important to evaluate the characteristics of stability and hazard degree accurately.Firstly,the authors studied the characteristics of the high slope on both banks,such as structure type,combination between structure plane and slope surface,rock mass weathering and the physical and mechanical properties.Then,the classification was given to rock mass,and based on rock mass quality classification,stability and potential engineering effect from gravity,bridge load and earthquake were synthetically evaluated by way of FLAC3D(Fast Lagrangian Analysis of Continua in 3 Dimensions) numerical simulation software.Finally,it is concluded that the site was adapted to building bridge.
引文
[1]国家电力公司贵阳勘测设计研究院.镇宁至胜境关公路北盘江特大桥两阶段(补充)初步设计工程地质勘察报告[R].2004.
[2]樊敬亮.高山峡谷地区大跨度桥梁岸坡稳定性分析、趋势预测及应用研究[D].北京:中国科学院地质与地球物理研究所,2005.
[3]吕悦军.贵州镇宁至胜境关公路重点工程场地地震安全性评价及工程场区地震动区划报告初稿[R].北京:中国地震局地壳应力研究所,2004.
[4]张咸恭,王思敬,张倬元,等.中国工程地质学[M].北京:科学出版社,2000.
[5]Itasca Consu lting G roup,Inc.FLAC[M].V.4.0USA:M inneapolisM innesota,2000.
[6]祁生文,伍法权,兰恒星.盘石头水库泄洪洞、导流洞进出口边坡稳定性分析[J].岩石力学与工程学报,2002,21(3):353-359.
[7]刘鸿文.材料力学:上册[M].北京:高等教育出版社,1995.
[2]樊敬亮.高山峡谷地区大跨度桥梁岸坡稳定性分析、趋势预测及应用研究[D].北京:中国科学院地质与地球物理研究所,2005.
[3]吕悦军.贵州镇宁至胜境关公路重点工程场地地震安全性评价及工程场区地震动区划报告初稿[R].北京:中国地震局地壳应力研究所,2004.
[4]张咸恭,王思敬,张倬元,等.中国工程地质学[M].北京:科学出版社,2000.
[5]Itasca Consu lting G roup,Inc.FLAC[M].V.4.0USA:M inneapolisM innesota,2000.
[6]祁生文,伍法权,兰恒星.盘石头水库泄洪洞、导流洞进出口边坡稳定性分析[J].岩石力学与工程学报,2002,21(3):353-359.
[7]刘鸿文.材料力学:上册[M].北京:高等教育出版社,1995.
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