Comprehensive grouting control method for water-rich broken rock mass under the condition of lack of effective slab

Abstract

The invention discloses a method for controlling water-rich fractured rock mass comprehensive grouting under the effective sealing batholite shortage condition. The method includes the steps of comprehensively detecting a hazard-formation water source and a water guide channel, designing a sealing batholite refitting scheme and a grouting treatment scheme, refitting sealing batholite, controlling the grouting process and the safety, conducting draining, pressure relieving, drilling and blocking, comprehensively detecting the grouting effect, compensating a weak zone for slip casting and the like. After construction is conducted through the method, by refitting the sealing batholite, the problems that due to the shortage of the effective sealing batholite, sap loss and grout leakage occur in the grouting process and the grouting effect is not good are solved, the grouting efficiency is improved, and good social benefits and economic benefits are created.

Description

Technical field [0001] The invention belongs to the field of tunnel and underground engineering disaster management, in particular to a comprehensive grouting control method for water-rich broken rock masses under the condition of absence of effective stop slabs. Background technique [0002] At present, as the focus of my country's infrastructure construction shifts to the central and western regions and urban underground transportation, the proportion of underground projects such as mountain tunnels and urban subways is increasing. Affected by the complex geological environment and topography, underground engineering construction often encounters water-rich broken rock masses such as broken zones, strong weathered zones, and karst fillings, causing geological disasters such as water inrush and landslides. At present, grouting is one of the main treatment methods for such bad geological bodies. Because the excavation of underground engineering directly exposes the water-rich br...

AI Technical Summary

Problems solved by technology

Because the excavation of the underground project directly exposed the water-rich broken rock mass, during the process of grouting reinforcement and water blocking, it is often difficult to directly use the rock mass in the exposed area as a sag-stopping slab due to the low strength of the rock mass in the excavation exposed area, resulting in serious grout running and grouting in the treatment area. The slurry is difficult to spread to the treatment target area

In addition, the lack of effective magmatism plate affects the sealing quality of the orifice pipe, and the orifice pipe and the edge of the surrounding rock become a channel for grout to flow out; It is difficult to increase the grout pressure, which reduces the grouting effect and restricts the project quality

Images