新建赣韶铁路黄金隧道塌方段注浆加固技术探讨  

Discussion of Grouting Reinforcement Technology for the Collapsed Section of the Huangjin Tunnel on the Newly-Built Ganzhou-Shaoguan Railway

作　　者：邹明波 张文新[2] 

机构地区：[1]北京中铁瑞威基础工程有限公司,北京100055 [2]中铁隧道集团有限公司,洛阳471009

出　　处：《现代隧道技术》2013年第4期176-182,共7页Modern Tunnelling Technology

摘　　要：赣韶铁路黄金隧道工程在里程DK171+050处出现了塌方,塌方段岩层为灰质砾岩、粉砂岩、泥岩,并伴有地下水渗出。施工中根据隧道塌方段地质情况,针对性地采用了长管棚超前支护、玻璃纤维锚杆超前加固和全断面超前帷幕预注浆的加固方案;并通过以先外后内、由上到下以及间隔跳孔、跳排为原则的前进式分段注浆方式实施了挤密型注浆,保证了注浆效果,提高了施工效率,达到了稳固围岩的目的。文章介绍了塌方段处理方案的实施,并通过数值计算方法分析了治理方案的合理性和实际效果。A collapse accident occurred at DK171＋050 of the Huangjin Tunnel on the Ganzhou-Shaoguan railway dur- ing which ground water seeped from the rock strata, which mainly consisted of ealcirudite, sihstone, and mudstone. Dur- ing the construction process, some special reinforcement schemes such as long pipe-roof pre-reinforcement, fiberglass bolt pre-reinforeement, and full-face advance curtain grouting were adopted in light of the geological conditions of the collapsed section. Furthermore, compaction grouting was conducted by a segmental-fo1~ard grouting technique on the principles of grouting from outside to inside, top to bottom, and at intervals, guaranteeing the grouting effects, improving construction efficiency, and ensuring the stability of the surrounding rocks. An analysis of the predicted and actual results was undertaken by means of numerical computation and is discussed in this paper, and treatment schemes for the collapsed sections are presented.

关 键 词：隧道塌方 治理方案 注浆加固 数值分析 

分 类 号：U457.5[建筑科学—桥梁与隧道工程] U455.49[交通运输工程—道路与铁道工程]