Kunming metro line 4 crosses the panlong river successfully

On April 25, reporters learned from kunming rail transit group co., LTD., a few days ago, by TieWuJu in construction of rail transit line 4 small vegetable garden in kunming station until the train left line between BeiZhan District smoothly through the panlong river "zero settlement", implements the shield construction safety smooth advance.

The distance between xiaocaiyuan station and the north railway station is 1530 meters, and the maximum depth is 40 meters. The construction risk control requirements of the interval are high, and the construction of the undercrossing of the shield is difficult. The section of panlong river under the shield tunneling machine is 44 meters long, and the stratum is a fully permeable gravel layer, with abundant underground water and shallow water level. Compared with 2 sewage pipes and 1 water supply pipe above the right underpass section, there are storage tanks and culverts on both sides above the left underpass section that are connected to the river, which is more difficult to construct and requires higher settlement rate. In this regard, the project department makes comparison and demonstration of various protection schemes in advance to fundamentally ensure construction safety and construction progress.