摘要
在千岛湖配水工程分水江穿江隧洞建造过程中,根据设计和构造要求,隧洞围岩中占比高的Ⅲ类围岩,由于整体性差、自稳定性差,需要进行固结灌浆,以保证岩体整体性与均质性。固结灌浆试验采用纯压式灌浆法,在隧洞灌浆施工完成验收后即采用“单点法”压水法试验检查隧洞透水率,根据分水江2;#;洞下游段及主洞Ⅲ类围岩在不同的灌浆序段中固结灌浆后围岩平均耗灰量以及灌浆前后隧洞透水率,做综合对比及分析,提出了针对穿江隧洞Ⅲ类围岩的固结灌浆的优化控制参数,构建Ⅲ(1)、Ⅲ(2)类围岩不同的固结灌浆的优化工艺参数体系,以此能够达到及时调整各种参数组合后获得最佳的综合优化工程方案,能够有效加快现场施工组织进度,减少实际施工作业费用支出的设计目的。
During the construction of the diversion river crossing tunnel of Qiandao Lake Water Distribution Project,according to the design requirements and structural requirements,ClassⅢsurrounding rock,which accounts for a high proportion of the tunnel surrounding rock,needs consolidation grouting due to poor integrity and self stability to ensure the integrity and homogeneity of the rock mass.The consolidation grouting test adopts the pure pressure grouting method.After the tunnel grouting construction is completed and accepted,the“single point method”water pressure method is used to test the tunnel permeability.In this paper,based on the average ash consumption of surrounding rock after consolidation grouting in the downstream section of Fenshuijiang Tunnel 2#and the ClassⅢsurrounding rock of the main tunnel in different grouting sequence sections,and the tunnel permeability before and after grouting,a comprehensive comparison and analysis are made,and the optimal control parameters for consolidation grouting of ClassⅢsurrounding rock of the river crossing tunnel are proposed,Establish the optimization process parameter system for different consolidation grouting of ClassⅢ(1)andⅢ(2)surrounding rocks,so as to achieve the design purpose of timely adjusting various parameter combinations to obtain the best comprehensive optimization project plan,effectively accelerating the on-site construction organization progress,and reducing the actual construction costs.
作者
贺新武
葛建军
房敦敏
HE Xinwu;GE Jianjun;FANG Dunmin(Huadong Engineering Corporation Limited,Hangzhou 311122,China)
出处
《四川建材》
2024年第7期101-103,共3页
Sichuan Building Materials
关键词
固结灌浆
穿江隧洞
优化
透水率
consolidation grouting
river crossing tunnel
optimization
permeability
作者简介
贺新武(1989-),男,宁夏银川人,硕士,高级工程师,主要从事房屋建筑施工管理工作。
