Real-time detection technology of synchronous grouting for shield tunnel and analysis of grouting effect

The tunnel synchronous grouting system is an important part of the shield machine. Shield tunnel synchronous grouting is an important measure to control stratum deformation and settlement of buildings. The traditional methods of grouting are by controlling grouting volume and grouting pressure, but the effect of grouting behind segments is difficult to control and the real-time monitoring of grouting quality is hard to test. The ground penetrating radar detecting device and the shield frame integration design are carried out for the real-time detection of grouting in the Qingxiushan ~ Boyi Road transit in Nanning Metro Line 3, based on the real-time detection of grouting behind segments. The synchronous guided grouting parameters' adjustment will significantly reduce the occurrences of super grouting, ensuring the safety of engineering and reducing the grouting engineering expenses.