A working method for monitoring the effect of grouting reinforcement in muddy slate tunnels

Abstract

A working method for monitoring the grouting reinforcement effect of an argillaceous slate tunnel, comprising the following steps: (1) taking a loose circle test on the current construction area of ​​the argillaceous slate tunnel, and determining the area to be reinforced in the argillaceous slate tunnel; ( 2) Drilling grouting holes to collect initial information of the argillaceous slate tunnel; (3) Adding a plurality of grouting tracking devices in the form of coarse aggregates to the grouting solution, and grouting the grouting holes for reinforcement (4) Generate the complete slurry diffusion network during the grouting process; (5) Calculate the dynamic elastic modulus and dynamic Poisson's ratio parameters, and make a preliminary evaluation of the grouting consolidation effect; (6) The stable slurry after grouting The same loose circle test method was used again in the slate tunnel for the final evaluation of the grouting consolidation effect. The invention can monitor the grouting effect accurately and efficiently, and ensure the safety of argillaceous slate tunnel construction.

Description

technical field [0001] The invention relates to the technical control field of grouting reinforcement for tunnel engineering, in particular to a working method for monitoring the grouting reinforcement effect of argillaceous slate tunnels. Background technique [0002] The argillaceous slate is a shallow metamorphic rock in the ancient world. It is gray and black due to the influence of local geological action. It is easy to leave dirty ponds when touched by hand. The plate-like structure is mostly thin to medium-thick plate. Sericite mudstone and carbonaceous material, hard and brittle variable mud structure. Its impact on engineering construction is relatively large, the engineering properties are relatively poor, and large deformation is likely to occur when the burial depth is large. According to some exploration data and chemical reports, the local carbonized argillaceous slate is expansive and has chloride salt intrusion, the carbonized argillaceous slate is soft and ...

AI Technical Summary

Problems solved by technology

During tunnel excavation, grouting is often used to reinforce the tunnel wall after the shield machine passes through. A large amount of grouting fluid will be lost if there are gaps or pipes in the direction of the wall. Often, a large amount of grouting fluid is added, but the rear wall cannot be filled, resulting in a substantial increase in grouting costs.