A grouting plugging method suitable for large karst caves under the condition of high velocity and flowing water

Abstract

The invention relates to a grouting plugging method suitable for large karst caves under the condition of high flow velocity and flowing water, comprising the following steps: step 1: forming a grouting hole, drilling with drilling equipment to form a grouting hole and an installation hole; step 2 , install the cloth bag device, set the lower end of the cloth bag device in the installation hole, and the upper end in the grouting hole; step three, pre-seal the grouting, inject the slurry into the geotextile bag; step four, form the feeding hole into a hole, at a high flow rate The upstream of the moving water is drilled with drilling equipment to form a feeding hole; Step 5, put in soft and hard aggregates, and put the soft and hard aggregates into the cave through the feeding pipe; The glass double slurry is injected into the feeding hole; Step 7, the high-pressure grouting hole is formed, and the solidified slurry in the geotextile bag is drilled to form a high-pressure grouting hole; Step 8, the high-pressure grouting, high-pressure grouting into the high-pressure grouting hole. It has the advantages of reasonable step design, good construction, good plugging effect, and good plugging reliability.

Description

Technical field: [0001] The invention relates to the technical field of high-velocity flowing water plugging of large karst caves, in particular to a grouting plugging method suitable for large karst caves under high-velocity flowing water conditions. Background technique: [0002] The traditional grouting sealing technology mainly uses cement slurry, cement-water glass slurry and / or polyurethane chemical materials for grouting sealing. Because the cement slurry is easily washed away by water and the setting time is long, the cement-water glass slurry Poor diffusion ability, difficult to control the setting time, severe reaction of polyurethane slurry with water, fast expansion and solidification rate, easy aging of consolidated body and other adverse effects, the traditional grouting plugging technology is mainly suitable for the situation where the flow rate is not high (close to the state of static water) . [0003] However, due to the uncanny workmanship of nature, ther...

AI Technical Summary

Problems solved by technology

[0004] In order to improve the plugging effect under high-velocity flowing water conditions, make the design of the plugging scheme more reasonable and tend to be perfect, various attempts have been made in the prior art to try to make the overall design of the plugging scheme more reasonable, but there are always Some unsatisfactory aspects, for example, Chinese patent CN108484058B discloses a hydrodynamic anti-dispersion plugging material and its preparation method, which improves its anti-dispersion ability by preparing a new plugging material, thereby improving For the plugging effect of high-velocity flowing water, although this technical solution improves the plugging effect, the preparation process of the plugging material is complicated and the composition configuration has a great influence on the material performance. In addition, there are large differences in the plugging effect of dynamic water at different flow rates. Therefore, , it is difficult to popularize and apply; another example is the Chinese patent CN111139853A which discloses a high-velocity karst pipeline hanging net, hook stone, and grouting joint plugging method, mainly relying on the special hanging net and hook stone to cooperate with the first pre-blocking, and then injecting The slurry is completely blocked. This technical scheme is theoretically feasible, but it is difficult to operate in actual construction. In the case of high flow rate and moving water in the cave, the difficulty of operation is further increased, and it is difficult to popularize and apply

Images