兰州交通大学学报
蘭州交通大學學報
란주교통대학학보
JOURNAL OF LANZHOU JIAOTONG UNIVERSITY（Natural Sciences）
2014年
1期
44-48
,共5页
水平旋喷%隧道坍塌%富水未成岩粉细砂%超前预加固处理
水平鏇噴%隧道坍塌%富水未成巖粉細砂%超前預加固處理
수평선분%수도담탑%부수미성암분세사%초전예가고처리
horizontal j et grouting%tunnel collapse%rich water immature fine sandstone%advanced pre-reinforcement treatment
在隧道发生坍塌方后围岩变得极不稳定，特别是在富水未成岩粉细砂地层中，易形成流塑状，导致二次坍塌，造成初期支护背后脱空，收敛变形，严重威胁到施工的安全和质量。详细介绍了兰渝铁路桃树坪隧道出口引进意大利水平旋喷超前预加固新技术对富水未成岩粉细砂层发生多次塌方后的处理技术。
在隧道髮生坍塌方後圍巖變得極不穩定，特彆是在富水未成巖粉細砂地層中，易形成流塑狀，導緻二次坍塌，造成初期支護揹後脫空，收斂變形，嚴重威脅到施工的安全和質量。詳細介紹瞭蘭渝鐵路桃樹坪隧道齣口引進意大利水平鏇噴超前預加固新技術對富水未成巖粉細砂層髮生多次塌方後的處理技術。
재수도발생담탑방후위암변득겁불은정，특별시재부수미성암분세사지층중，역형성류소상，도치이차담탑，조성초기지호배후탈공，수렴변형，엄중위협도시공적안전화질량。상세개소료란투철로도수평수도출구인진의대이수평선분초전예가고신기술대부수미성암분세사층발생다차탑방후적처리기술。
The tunnel surrounding rock became very volatile after the collapse especially in rich water immature fine sandstone strata,the fine sand strata is easy to formation flow of plastic and leading to collapse for the second time,which causes back of the primary support collapse,conver-gence deformation,seriously threat the safety and quality of construction.This article implies the horizon-tal j et grouting advanced pre-reinforcement new technology introduced form Italy used to the rich water immature fine sandstone which used in the exit of Taoshuping tunnel in Lanyu railway.
