摘要
软岩地层输水隧洞施工过程中,大变形问题极为突出,会严重影响施工安全和进展。文章以观音阁输水工程为例,利用FLAC3D模型数值对软岩严重挤压变形段的最佳让压支护参数进行研究,根据研究结果,建议让压点和起始让压量选择10cm+10cm。
The large deformation problem is very prominent during the construction of convey tunnel in soft rock stratum, which seriously affects the construction safety and progress. Guanyinge Water Conveyance Project is adopted as an example in the paper. FLAC3 D model value is utilized to study the optimal compressive support parameters in the severely extrusion deformation section of soft rock. It is suggested to select 10 cm+10 cm as the pressure relief point and the initial pressure relief amount according to the research results.
引文
[1] 黄晓秋.观音阁水库输水工程料场储量估算及质量评价[J].水利技术监督,2018(3):1-2,23.
[2] 蒋立柯,宇彤.观音阁水库输水隧洞方案选取[J].水科学与工程技术,2016(6):69-71.
[3] 朱安龙,汪波,徐建强,等.大变形隧洞支护现状与新型让压支护发展与展望[J].人民长江,2015,46(23):50-54,76.
[4] 韩万东,谷明宇,杨晓云,等.FLAC3D数值模拟的边坡稳定性[J].辽宁工程技术大学学报(自然科学版),2013,32(9):1204-1208.
[5] Rui T,Zhanjin L.Deep Soft Rock Tunnel Support Technology and Simulation in Fanshan Phosphate Mine[M].Springer Berlin/Heidelberg:2012.
[6] 周勇,王涛,吕庆,等.基于FLAC3D岩石应变软化模型的研究[J].长江科学院院报,2012,29(5):51-56,61.
[7] 朱安龙,徐建强,汪波,等.大变形隧洞不同支护方案支护效果的对比分析[J].水利水电技术,2015,46(12):23-28.
[8] 张梅花,高谦,闫振华,等.金川矿区副井工程让压支护数值分析与参数优化[J].矿冶工程,2010,30(1):13-16.