Research Study on Mechanics Mechanism of Roadbed Grouting for Shallow Buried Tunnel

Abstract

The traffic congestion has become a prominent problem in many cities under the rapid development of urbanization at present in China. In order to solve it, more and more cities have accelerated the development of the subway traffic. In consequence of that, there will be a large number of tunnel construction technical problems to be solved. The strata deformation caused by the tunnel construction, especially in the dense urban area, has always been a subject of great concern. Especially in shallow tunnel construction, the surface will form a settlement trough due to the excavation of the stratum. The construction sink may inflict the road pavement damage, underground pipeline damage, as well as the damage of buildings. The grouting process is one of the most effective methods to solve the construction settlement. The grouting process has been widely used in tunnel construction because it may contribute to the reinforcement of the rock and the soil in situ and will change their inherent physical and mechanical properties. In this paper, combined with the construction of one shallow buried tunnel in a city, the method of roadbed grouting has been adopted to make the reinforcement for the roadbed. This paper studies the precautions which are needed when the soft soil roadbed does not interrupt the traffic. The study may provide some certain guiding significance for the construction of other city underground road on soft soil foundation [1-4].