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| 软岩公路隧道系统锚杆概率可靠度及灵敏度分析 | |
| 引用本文： | 巩正玺,杨建国,陈明.软岩公路隧道系统锚杆概率可靠度及灵敏度分析[J].现代隧道技术,2011,48(5). |
| 作者姓名： | 巩正玺 杨建国 陈明 |
| 作者单位： | 1. 甘肃省水利水电工程局,兰州,730030 2. 中国科学院寒旱所,兰州,7300001 3. 交通运输部科学研究院,北京,100029 |
| 摘 要： | 为了解锚喷支护中系统锚杆受力情况,判断隧道衬砌结构稳定性,确保施工安全,避免支护结构失稳带来的损失,结合工点工程地质条件,选择围岩弹性模量、衬砌厚度等作为主要随机变量,计算得到锚杆概率可靠度.利用Spearman秩相关系数对锚杆概率灵敏度进行分析,认为围岩物性参数和喷混凝土厚度是影响锚杆可靠性的主要因素.要提高锚喷支护的安全和稳定性,除保证系统锚杆施工质量外,应确保喷混凝土厚度及其施工质量.在研究段落选择任意断面埋设预制测试锚杆,对隧道周边围岩不同点位锚杆锚固力进行连续监测,获得了大量实测数据;通过绘制时态曲线和锚杆轴力图,分析得到锚杆轴力大小、横向分布及时态变化情况,从承载力角度验证了锚杆的可靠度,现场测试与概率可靠度计算结果吻合. |
| 关 键 词： | 公路隧道 锚喷支护 系统锚杆 概率灵敏度 锚杆锚固力 |
Probabilistic Reliability and Sensitivity of System Bolt in Soft Rock Highway Tunnel |
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| Gong Zhengxi,Yang Jianguo,Chen Ming.Probabilistic Reliability and Sensitivity of System Bolt in Soft Rock Highway Tunnel[J].Modern Tunnelling Technology,2011,48(5). | |
| Authors: | Gong Zhengxi Yang Jianguo Chen Ming |
| Institution: | Gong Zhengxi1 Yang Jianguo2 Chen Ming3(1 Gansu Water Resources and Hydropower Engineering Bureau,Lanzhou 730030,2 Cold and Arid Regions Environmental Engineering Research Institute,Lanzhou 730000,3 China Academy of Transportation Sciences,Beijing 100029,China) |
| Abstract: | In order to understand the force in a system of rock bolts in bolt-shotcrete support,judge the stability of the tunnel lining structure and avoid loss resulting from instability of the support structure,the probabilistic reliability of the system of rock bolts is calculated based on the geological conditions of the discussed project with the elastic modulus of surrounding rock and thickness of the lining as the main random variables.Probabilistic sensitivity is analyzed using the Spearman rank correlation c... |
| Keywords: | Highway tunnel Combined support by bolt and shotcrete System bolt Probabilistic reliability Sensitivity Anchoring force monitoring |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |