Karst Geological Features Roadbed The Karst Disease Investigation And Control

From researching the developmental attribute of groundwater at karst area, combined with several common karst disease of roadbed, this article believe that the essential reason which threaten the stability of roadbed is the movement of karst water and its formation body of rock and soil with special structure; and the special structure mainly in its special interface of soil and rock and its gap, such as soil cavity and solution cavity, which is important for us to investigate and treat the karst disease of roadbed.Aimed at the property of karst disease exploration, after studied several common investigating methods, combined with many engineering practice, this article put forward a synthetic investigating method: resource collection geology survey geophysic exploration synthetic analysis and evaluation.It discussed the analysis methods and treatment of three forms (roadbed karst water, karst collapse and karst roadbed uneven settlements), which are the essential reason resulting in karst diseases. It put forward that when comes to karst water, it is better to for us to opening up than impeding it; This article also generalized the analysis methods of the stability of cavern, list three common treatment methods; It discussed the roadbed collapse grouting treatment methods which caused by substance movement, and which result from the long-time movement of karst water. Through generalizing some experience, together with some engineering practices, this article put forward some empirical achievements and formula about grouting technology, about the design of injected hole and the quantity of grouting; With the treatment of uneven settlement of karst roadbed, we should consider it synthetically by combining with the load surface design mark, roadbed influence depth and roadbed bearing capacity, and use some corresponding methods to dispose the rock in the soil or the soil in the rock, which can meet the requirement of settlements.