Guiyang rail transit line 2, the second phase of forest park station to longdongpu station inter-district tunnel through

On the morning of June 20, the inter-district tunnel between the forest park station and longdongpu station of guiyang rail transit line 2, which was built by Shanghai baoye group co., LTD, was completed. At this point, all underground excavation sections between stations of the second phase of line 2 were fully connected.

The area between forest park station and longdongbao station of line 2 is located at the south foot of forest park. The section is divided into two sections: elevated line and underground tunnel. The length of the tunnel on the right side of the section is 720 meters. Forest park station - longdongbao station excavation section, through about 200 meters of high fill area, high security risk. In guiyang railway group construction departments and support, the project department in strict accordance with the specification and design organization, scientific arrangement, strictly follow the "advanced, strict grouting, short excavation and strong support, fast closed, frequently measure" excavation principle, using in annular island pit hole reserved core with surface soil excavation method of the grouting construction, dynamically adjust the supporting parameters, using advanced drilling, geological radar and infrared detection, surface scanning and other means to advance the geological situation in front of the formation conditions and constraints of excavation, strengthen the monitoring measurement of tunnel and surface, more measures simultaneously ensure tunnel safety through smoothly.