[1]刘运泽,洪 勇,李柏霄.隧道洞口古滑坡堆积体边坡综合加固治理技术研究[J].西安建筑科技大学学报(自然科学版),2020,52(03):351-358.[doi:10.15986/j.1006-7930.2020.03.007]
 LIU Yunze,HONG Yong,LI Boxiao.Study on the comprehensive reinforcement and control technology of the ancient landslide accumulation body slope of tunnel[J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2020,52(03):351-358.[doi:10.15986/j.1006-7930.2020.03.007]
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隧道洞口古滑坡堆积体边坡综合加固治理技术研究()
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西安建筑科技大学学报(自然科学版)[ISSN:1006-7930/CN:61-1295/TU]

卷:
52
期数:
2020年03期
页码:
351-358
栏目:
出版日期:
2020-06-30

文章信息/Info

Title:
Study on the comprehensive reinforcement and control technology of the ancient landslide accumulation body slope of tunnel
文章编号:
1006-7930(2020)03-0351-08
作者:
刘运泽1洪 勇2李柏霄2
(1.中铁十二局集团 第一工程有限公司,陕西 西安 710038; 2.西安建筑科技大学 土木工程学院,陕西 西安 710055)
Author(s):
LIU Yunze1HONG Yong2LI Boxiao2
(1.The 1st Engineering Co.Ltd.of China Railway 12th Bureau Grop, Xi’an 710038, China; 2.School of Civil Engineering,Xi’an Univ.of Arch.& Tech., Xi’an 710055, China)
关键词:
古堆积体 洞口边坡 边坡加固 数值分析
Keywords:
accumulation body tunnel slope slope reinforcement numerical analysis
分类号:
U45; TU457
DOI:
10.15986/j.1006-7930.2020.03.007
文献标志码:
A
摘要:
为保证隧道安全进洞施工,须对隧道洞口人工取土扰动的古滑坡堆积体边坡进行综合加固治理.通过理论计算对抗滑桩、锚杆-锚索框架梁、坡脚回填反压等加固治理方案进行设计,利用Flac3D软件分析了堆积体治理前后的稳定性,对支护结构相关参数进行了优化,并对综合治理效果进行了评价,形成了一套较完整的隧道洞口堆积体综合治理技术.研究结果表明:优化的综合支护措施相比单一支护措施显著提高了边坡稳定性,且满足规范及边坡进洞安全要求,抗滑桩尺寸和距坡顶距离、锚索施加预应力值对边坡稳定性影响较大,此外,结合工程实际采用减一跨桥台增设路基的方案,实现边坡反压,提高洞口边坡稳定性.现场监测数据表明,经过综合加固治理后的古滑坡堆积体边坡满足规范要求,保证了隧道安全进洞施工.
Abstract:
In order to ensure the safety of tunnel construction, it is necessary to comprehensively strengthen and control the ancient landslide accumulation slope disturbed by artificial soil sampling at the tunnel portal.Through theoretical calculation of anti-slide pile, anchor and anchor cable frame beam, slope toe back fill pressure such as strengthening management scheme were designed.Through the numerical simulation based on Flac3D analysis of the stability of the rock before and after the deposit management for supporting structure parameters are optimized, the paper proposed a set of relatively complete deposit of tunnel portal and comprehensive control technology, and the comprehensive control effect was evaluated.Results show that the optimized comprehensive support measures significantly improve the slope stability compared with the single support measures, and meet the requirements of the specifications and the safety of the slope into the tunnel.The size of the anti-slide pile, the distance from the top of the slope and the prestressed value of the anchor cable have great influence on the stability of the slope.In addition, according to the actual situation of the project, the scheme of reducing one span abutment and adding subgrade is adopted to realize the back pressure of the slope and improve the stability of the portal slope.Field monitoring data show that the slope of the ancient landslide accumulation body after comprehensive reinforcement meets the requirements of the specification, which ensures the safe tunnel construction.

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备注/Memo

备注/Memo:
收稿日期:2019-10-31 修改稿日期:2020-05-12
基金项目:国家自然科学基金资助项目( 11872287)
第一作者:刘运泽(1973-),男,高级工程师,主要从事土木工程相关研究管理工作.E-mail: 452000028@qq.com
更新日期/Last Update: 2020-07-30