Combining with the situation of accruing subgrade disease in provincial road Lao-Song line,the author analyzes the causes of disease,provides treatment scheme of sleeve valve tube static pressure grouting,introduces its reinforcement technology and reinforcement mechanism,and discusses the sleeve valve tube grouting,so as to improve application of this technology.

The application of sleeve-valve-pipe grouting in road foundation disease management;

Studies of sleeve-valve-pipe grouting technique and its effect on soil reinforcement;

The pressure grouting reinforcemont effective method of quality problems pile is introduced by two examples of the actual works,and the valve sleeve pipe high pressure grouting method is also introducal briefly.

In combination with the project example for the pavement cracking due to back fill density of rainwater and se￣wage pipe trough under roads not meet the design requirement,it should be consolidated by sleeve-valve type split grouting method and dynamic consolidation method.