Grouting reinforcement design and construction of old roads;

Karst roadbed grouting reinforcement construction technology

In order to make clear the effect of grouting reinforcement of broken rocks,grouting reinforcement test of post-peak rock sample was made and then the sample was tested by adopting cement slurry and Malisan N,respectively.

This paper introduced the two-step coupled grouting method to consolidate the joint,and achieved better results.

Based on similar theory,the deformation properties of-440 pump with high rheological Surrounding Rock are studied by similar material experiment ungrouting and postgrouting at Wannian Coal Mine.

This paper analyses the disease origin in new subgrade of the sixth speeding-up in Jing-Guang Line,proposes the measure of static press grouting in subgrade projects,and introduces in detail the subgrade strengthening plan and construction techniques.

This paper presents blasting grouting consolidation technology and "U" Shaped conduction cave blasting drilling technology applied in fault zones, which result in a safe, quality and efficient effect in construction.

Combined with engineering example,the foundation was consolidated by deep layer agitating cement pile and grouting,its grouting consolidation technology and agitating pile consolidation technology were illustrated.

Based on theroy analysis of clamage evolution and broken process of roof coal,Malisan N produce is adopted in advance grouting reinforce in S 2-1 workface end of Changcun coal mine,it maintains stable of entry roof,safety and economic result are gained.

The text introduces the geology advance forecast,advance grouting reinforce and timbering,grouting effect check up and the construction process in cavity section PDK354+255～+275 of the tunnel.

Experiments of grouting reinforcement indicate that the intensity of grouted rock mass is higher than that of non-grouted.