软土地层盾构区段空洞处理技术研究

随着粤港澳大湾区的逐步发展,粤港澳地区扩建工程呈现出规模大、地层复杂等特点,尤其是在临海软土区的工程,往往会伴随着复杂的工程地质问题.以深圳机场T4航站楼地基处理工程为背景,针对拟建T4航站楼场地周边地铁工程盾构后出现的空洞危害,采用适宜的地质雷达探测了空洞的大致形状及方位,结合场地条件分析其形成原因主要为施工工艺、衬...

Cavity Treatment Technology of Tunnel in Shield Section of Soft Soil

With the gradual development of the Great Bay area of Guangdong,Hong Kong and Macao,the expansion project of Guangdong,Hong Kong and Macao has the characteristics of large scale and complex stratum.Especially in the soft soil area near the sea,there are always complicated engineering geological problems.Taking the foundation treatment project of Terminal 4 of Shenzhen Airport as the background,aiming at the damage of the cavity after shield tunneling around the site of the proposed Terminal 4,the general shape and orientation of the cavity are detected by the appropriate ground penetrating radar,and the formation causes are analyzed combining with the site conditions,which are mainly related to the construction technology,lining concrete materials,shield equipment and the influence of site ground stress.Sleeve valve pipe grouting was used to deal with the cavity damage,and the effect of cavity treatment was tested on site,so as to provide a reference for the cavity treatment in Guangdong,Hong Kong,Macao and other similar areas in China.