Presumably, many people do not know much about the construction method of road subgrade grouting reinforcement and repair, in order to solve this problem, the following is sorted out the relevant content for your reference.
The road subgrade grouting reinforcement repair construction method is a common road maintenance and reinforcement method, which is mainly used to improve the stability of the road subgrade and prolong the service life of the road. This paper will make an in-depth analysis of the investigation, design and reinforcement methods of road subgrade grouting reinforcement and repair construction methods. The details are as follows:
1. Survey:
Before the subgrade grouting reinforcement repair can be carried out, a detailed road condition survey is required. The survey includes the structure of the road, soil conditions, groundwater level, nearby buildings and pipelines, etc. Through the investigation, we can understand the disease degree and its causes of the roadbed, and provide a basis for the subsequent design and reinforcement work.
2.Design:
Based on the survey results, the designer needs to develop a detailed reinforcement plan. The bearing capacity, deformation performance and stability requirements of the roadbed should be considered in the design. According to the actual situation, select the appropriate grouting materials, grouting methods and construction technology. The design also needs to take into account factors such as construction conditions, construction period and budget to ensure the feasibility of the reinforcement project.
3.Reinforcement Method:
The methods of subgrade grouting reinforcement and repair mainly include two methods: pre-grouting and post-grouting methods.
1) Pre-grouting :
Pre-grouting is a reinforcement measure carried out before road construction to improve the bearing capacity and stability of the roadbed through grouting. Pre-grouting generally uses cement slurry or epoxy resin as grouting materials. The specific pre-grouting methods include pore plugging method, filling method and sealing method. Pre-grouting can reduce subgrade settlement and deformation, and improve the overall compressive capacity.
2) Post-grouting :
Post-grouting is a reinforcement and repair method carried out after road construction, which is mainly used to solve the problem of partial disease or local settlement of the roadbed. Post-grouting generally uses materials such as polyurethane foam or polymer grouting agent. The specific post-grouting methods include drilling grouting, spraying grouting and sandwich grouting. Post-grouting can fill the voids in the subgrade and improve the overall strength and stability of the subgrade.
The survey, design and reinforcement method of road subgrade grouting reinforcement and repair construction method is a systematic project, which requires detailed road condition investigation, reasonable reinforcement plan, and appropriate grouting materials and construction methods are used for reinforcement and repair. This method has important application value in road repair and reinforcement work.