砂卵石地层盾构始发端头加固技术研究  

Research on Reinforcement Technology of Shield Initial End in Sandy Gravel Stratum

作　　者：马安震 关少钰 谭海星 张子来 MA Anzhen;GUAN Shaoyu;TAN Haixing;ZHANG Zilai(CCCC First Highway Consultants Co.,Ltd.,Xi'an 700000,Shaanxi,China)

机构地区：[1]中交第一公路勘察设计研究院有限公司,陕西西安700000

出　　处：《工程技术研究》2023年第2期76-80,共5页Engineering and Technological Research

摘　　要：目前,国内对砂卵石地层盾构始发端头加固研究较少。文章以宁夏中宁县热电联产供热管网穿黄盾构隧道为例,采用工程类比、理论分析和数值模拟等方法,研究砂卵石地层盾构始发端头加固方法及合理加固范围。研究表明:砂卵石地层采用注浆法及端头素混凝土防渗墙的加固方法是合理有效的;在保证加固土体质量的前提下,高水压砂卵石地层纵向加固长度取6 m,径向加固范围取3 m是合理的。At present, there are few studies on the initial end reinforcement of shield tunnel in sandy gravel stratum in China. Taking the shield tunnel for heat-electricity cogeneration heat supply pipe network crossing the Yellow River in Zhongning County of Ningxia as an example, this paper studies the reinforcement method and reasonable reinforcement range of the initial end of shield tunnel in sandy gravel stratum by means of engineering analogy,theoretical analysis and numerical simulation. The research shows that the grouting method and the reinforcement method of plain concrete cut-off wall at the end of the sandy gravel stratum are reasonable and effective. On the premise of ensuring the quality of the reinforced soil, it is reasonable to take the longitudinal reinforcement length of 6 m and the radial reinforcement range of 3 m for the sandy gravel stratum with high water pressure.

关 键 词：穿越黄河 盾构隧道 砂卵石地层 端头加固 

分 类 号：U459.5[建筑科学—桥梁与隧道工程]