风积沙地层水平旋喷桩预支护技术  

Pre-supporting Technology of Horizontal Jet Grouting Pile in Aeolian Sand Layer

作　　者：张广乾 李向阳 刘先成 ZHANG Guangqian;LI Xiangyang;LIU Xiancheng(Shaanxi Branch of China National Geological Exploration Center of Building Materials Industry,Xi'an 710003,China;Xi'an Building Materials Geological Engineering Survey Institute Co.,Ltd.,Xi'an 710003,China;Shaanxi Zhongxiang Foundation Engineering Co.,Ltd.,Xi'an 710003,China)

机构地区：[1]中国建筑材料工业地质勘查中心陕西总队,西安710003 [2]西安建材地质工程勘察院有限公司,西安710003 [3]陕西中祥基础工程有限责任公司,西安710003

出　　处：《路基工程》2024年第6期152-156,共5页Subgrade Engineering

摘　　要：以榆神高速神木1号隧道水平旋喷桩超前支护为背景,阐述风积沙地层失稳原因,介绍水平旋喷桩的作用机理、工程特性、施工工艺及关键技术。水平旋喷实施形成的旋喷拱壳可有效解决风积沙地层中隧道施工引起的流沙、漏沙、掌子面失稳及洞周大变形问题;在合理的旋喷参数下,能够以较低的工程造价,实现安全可靠的超前支护,确保隧道施工安全。Based on the pre-support of horizontal jet grouting pile in#1 Shenmu Tunnel of Yulin—Shenmu High Speed Railway,the causes of instability in aeolian sand layer are expounded,and the mechanism,engineering characteristics,construction technology and key technologies of horizontal jet grouting pile are introduced.The arch shell formed by horizontal jet grouting can effectively solve the problems of quicksand,sand leakage,face instability and large deformation around the tunnel caused by tunnel construction in the aeolian sand layer.Under the reasonable parameters of jet grouting,the safe and reliable pre-support can be realized at a lower engineering cost to ensure the safety of tunnel construction.

关 键 词：高速公路 风积沙地层 浅埋暗挖 水平旋喷桩 超前支护 变形控制 稳定性 

分 类 号：U455[建筑科学—桥梁与隧道工程]