考虑洞室开挖效应的地下厂房岩锚梁稳定性分析与评价

发布时间：2018-02-01 02:05

本文关键词： 地下厂房岩锚梁锚杆 interface单元稳定性　出处：《水电能源科学》2016年10期 　论文类型：期刊论文

【摘要】：地下厂房建设过程中,岩锚梁作为重要建筑物,其安全稳定性一直备受关注。以乌弄龙水电站地下厂房为例,采用FLAC3D软件中的interface单元模拟岩锚梁与岩壁接触面,并考虑厂房开挖和支护与岩锚梁安装和运行的全过程。分别在岩锚梁与岩壁接触面的竖直面胶结完好、开裂两种工况下,计算分析乌弄龙地下厂房岩锚梁在运行期的稳定性,并结合监测数据进行了对比分析。结果表明,interface单元能很好地反映岩锚梁与岩壁接触面的开裂性能;岩锚梁与岩壁接触面的竖直面胶结程度对接触面上应力分布、岩锚梁受拉锚杆轴力、岩锚梁整体抗滑稳定性均有重要影响。
[Abstract]:In the process of underground building construction, rock anchor beam as an important building, its safety and stability has been concerned. Take the underground powerhouse of Wulonglong Hydropower Station as an example. The interface between rock anchor beam and rock wall is simulated by interface element in FLAC3D software. The whole process of installation and operation of the excavation and support of the powerhouse and the installation and operation of the rock anchor beam are considered respectively under the two conditions of intact cementation and cracking of the vertical plane of the contact plane between the rock anchor beam and the rock wall. The stability of rock anchor beam of Wulonglong underground powerhouse is analyzed and compared with monitoring data. The interface element can well reflect the cracking performance of the interface between the rock anchor beam and the rock wall. The degree of vertical cementation between rock anchor beam and rock wall has an important effect on stress distribution, axial force of rock anchor beam and overall stability of rock anchor beam.
【作者单位】：中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室;
【基金】：国家自然科学基金项目(51209198,51204158)
【分类号】：TV731.6
【正文快照】： 1工程概况乌弄龙水电站位于维西县巴迪乡境内,为澜沧江上游河段规划方案中的第二级电站。该电站采用右岸地下引水发电系统,主厂房、主变室、尾水调压室三大洞室平行布置,轴线方向NE50°,属洞室群结构;主厂房尺寸189.00m×26.70m×70.25m(长×宽×高),主变室尺寸143.7 m×18.0m

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