Large-aperture single-hole non-pressure grouting method for karst water inrush

Abstract

The invention provides a large-aperture single-hole non-pressure grouting method for karst water inrush. The large-aperture single-hole non-pressure grouting method comprises the following steps that1, a grouting hole and an air outlet hole are constructed; 2, a sleeve is hoisted and placed into the grouting hole, a grouting hopper is hoisted and inserted into the upper end of the sleeve, a lifting appliance of a crane is connected with a lifting lug on the sleeve, a grouting material is injected from the upper end of the grouting hopper through a grouting pipe of a grouting pump truck, and meanwhile the sleeve is hoisted to do up-down reciprocating motion; 3, when the water amount of a karst water inrush water outlet is obviously reduced to the flow, the up-down motion of the sleeve is stopped, and the grouting material continues to be poured; and 4, after the construction grouting hole is filled with the grouting material, hole sealing treatment is carried out. According to the grouting method, a large-size and large-water-pressure karst water inrush channel can be efficiently blocked.

Description

technical field [0001] The invention relates to the technical field of karst water inrush control, in particular to a large-diameter single-hole pressureless grouting method for karst water inrush. Background technique [0002] During the excavation of rock and soil, the original stratum structure is destroyed, the mechanical balance state of the soil and water in the stratum is broken, and when there is no timely protection, the process of causing water and soil to pour into the excavation face together It is called water inrush and mud inrush. The water flow rate is greater than 0.1m3 / s, and there is a certain pressure and flow rate, which is called water inrush. Underground faults and karst are developed in the water inrush area, the karst channel is large, and the water pressure is high. The reinforced concrete at the water inrush hole and the cement mud and water glass in the small-diameter borehole are poorly poured, and the purpose of sealing the water inrush cannot b...

AI Technical Summary

Problems solved by technology

Underground faults and karst are developed in the water inrush area, the karst channel is large, and the water pressure is high. The reinforced concrete at the water inrush hole and the cement mud and water glass in the small-diameter drilling are not effective, and the purpose of sealing the water inrush cannot be achieved.

Due to the large underground karst passage, more concrete is injected through large-diameter boreholes, and it must be injected at one time. During the pouring process, it is difficult for the grouting material to completely fill the karst passage, which reduces the grouting effect and makes it difficult to stop water. The setting of material concentration is still difficult to ensure that the grouting material is filled and deposited in the karst channel

[0003] For example, the application number is 00134168.5, the name is expansion grouting material for winter construction and its preparation method, and the application number is 201810635255.3, the name is a patent for grouting material and grouting filling construction method suitable for filling caves in karst areas, Mainly through the improvement of grouting materials, multiple grouting methods are often used. For the case where the channel size and water pressure are large, the grouting effect is limited

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