APPLICATION OF HORIZONTAL JET GROUTING PILES IN CONSTRUCTING A MINED TUNNEL IN WATER-RICH SAND LAYER
The research background of this paper is water-rich sand layer of Baoer-Hexi section tunnel of Qingdao Metro Phase I Project,the paper focus on application of horizontal jet grouting pile pre-reinforcement technology in a mixed soilrock region featuring soft soil underlain by hard rock,and introduces difficult and key points in this project,and describes the process of optimizing horizontal jet grouting pile construction.To understand the reinforcement effect of jet grouting piles,we collected samples to carry out laboratory point load test and compressive strength test,and studied influences of jet grouting pile construction on ground surface settlement based on field monitoring data.The monitoring results demonstrate that 80% of cumulative variations are within the control range,indicating that horizontal jet grouting piles have an obvious effect on controlling settlement.The research results provide a certain guiding significance for subsequent construction.
mixed soil-rock water-rich sand layer horizontal jet grouting reinforcement tield monitoring
JIANGUO ZHENG TAO LIU
College of Environmental Science and Engineering,Ocean University of China,Qingdao,266100,China
国际会议
5th China-Japan Geotechnical Symposium(第五届中日岩土工程学术会议)
成都
英文
437-442
2013-05-18（万方平台首次上网日期，不代表论文的发表时间）