The role of geogrid reinforcement construction technology in widening highway subgrade

In the construction of highway engineering projects, the application of geogrid reinforcement construction technology has significant advantages. It has strong stability and can effectively extend the service life of highway projects and improve its project quality. Therefore, in practical applications, construction units must strengthen their knowledge and understanding of this technology and actively adopt this technology to carry out construction work.

1 The main role of geogrid reinforcement construction technology

In highway roadbed widening construction, geogrid reinforcement construction mainly includes excavation of the original roadbed, laying of geogrids, overlapping treatment of new and old roadbeds, and filling treatment between new and old roadbeds. The application characteristics of geogrid reinforcement construction technology are mainly reflected in the following aspects.

1.1 Helps improve the stability of the roadbed

In the widening of highway roadbed, geogrid reinforcement construction technology can effectively enhance the strength and stability of the roadbed and improve the bearing capacity of the roadbed. This technology mainly uses geogrids to reinforce highway subgrades to improve the bearing capacity and stability of the foundation. At the same time, geogrid reinforcement construction technology can also effectively reduce foundation settlement and cracks and improve the quality of highway subgrade widening. In the highway subgrade widening project, if the original subgrade settlement problem is not effectively dealt with, it will lead to great differences between the new and old subgrades, which will cause the pavement structure to be greatly affected. If these differential settlements are not dealt with, It will cause damage to the pavement structure and reduce the overall load-bearing capacity of the pavement.

1.2 Can reduce roadbed deformation

During the roadbed widening construction, there are certain differential settlement and cracking problems between the new and old roadbeds. If effective control measures are not taken, it will lead to a reduction in road stability, affect the normal passage of vehicles, and even cause traffic accidents in severe cases. Therefore, the application of geogrid reinforcement construction technology in roadbed widening construction can effectively control the differential settlement and cracking problems between the new and old roadbeds and reduce the incidence of traffic accidents. Normally, during the construction of highway engineering projects, certain measures will be taken to solve the problem of differential settlement and cracking between the new and old roadbeds, which mainly include the following aspects: First, reasonable excavation of the new and old roadbeds, and the original The roadbed is excavated, and the original roadbed is filled and rolled; the second is to process the original roadbed, using gravel or rubble and other materials to fill the original roadbed; the third is to lay a certain thickness on the surface of the original roadbed Geogrids are combined with the original roadbed to effectively solve the problems of differential settlement and cracking between the new and old roadbeds. The application of geogrid reinforcement construction technology in highway widening projects can effectively control differential settlement and cracking problems between new and old roadbeds. Normally, in the construction of highway widening projects, geogrid reinforcement construction technology is mainly used to increase the friction resistance between the new and old roadbeds, thereby effectively controlling the differential settlement and cracking problems between the new and old roadbeds. , improve the stability and reliability of the pavement structure.

1.3 Can enhance the integrity of the roadbed

In the construction of highway widening projects, the overlapping treatment of the new and old roadbeds is a very important link. If the new and old roadbeds are not fully overlapped, it will lead to uneven stress distribution between the new and old roadbeds, resulting in uneven development of the new and old roadbeds. Settles evenly. Since there are great differences between the new and old roadbeds during the construction of highway widening projects, it is necessary to use geogrid reinforcement construction technology to improve the connection effect between the new and old roadbeds, and at the same time, in order to ensure that the highway is widened The quality and stability of project construction require the rational application of geogrid reinforcement construction technology. Through the application of geogrid reinforcement construction technology, the stress concentration phenomenon at the overlap between the new and old roadbeds during highway widening project construction can be effectively improved, and the integrity between the new and old roadbeds can be effectively improved.

1.4 Helps improve the bonding state between new and old roadbeds

In the construction of highway widening projects, the bonding state between the new and old roadbeds is directly related to the quality and stability of the highway widening project construction. If the bonding state between the new and old roadbeds is not good, it will lead to There is a large difference, which leads to stress concentration between the new and old roadbeds, and ultimately leads to uneven settlement of the new and old roadbeds. Therefore, during the construction of highway widening projects, geogrid reinforcement construction technology can be used to promote the combination of new and old roadbeds, thereby effectively avoiding uneven settlement problems during the construction of highway widening projects.