Method for forming complete seepage prevention curtain in two media of rock and soil

Abstract

The invention discloses a method for forming a complete seepage prevention curtain in two media of rock and soil. High spray pile construction or deep stirring pile construction is carried out on an upper soil layer to form an upper soil layer seepage prevention curtain wall (3); rock layer curtain grouting holes (2) are drilled in the top of the formed upper soil layer seepage prevention curtain wall (3) according to the hole distance and hole depth designed in rock curtain grouting to a waterproof rock layer; rock layer curtain grouting pipes (1) are sleeved with grouting hole grout block plugs (4), the grouting hole grout block plugs (4) are inserted into the rock layer curtain grouting holes (2), the curtain grouting work is completed through the rock layer curtain grouting pipes (1) according to rock grouting standard requirements, and therefore a lower rock layer waterproof curtain wall (5) is formed in a lower rock layer, and finally a complete vertical seepage prevention curtain wall from the soil layer to the rock layer is formed. According to the seepage prevention curtain constructed and completed through the method, underground water can be effectively prevented from streaming in the lower rock layer of the earth surface, the formed wall quality completely meets the environmental protection requirements of current mine lots and plants, construction speed is high, and the cost is low.

Description

technical field [0001] The invention relates to a construction method of an anti-seepage curtain, in particular to a method for constructing a complete vertical anti-seepage curtain wall in two mediums of rock and soil, which is suitable for high vertical anti-seepage requirements and does not allow underground bypass flow , The vertical anti-seepage curtain project under the engineering geological conditions of upper soil and lower rock (including broken rock mass, strongly weathered rock mass, and moderately weathered rock mass). Background technique [0002] Soil is an accumulation of loose particles and a medium with continuous pores. Rock mass is a natural geological body within a certain engineering range. After various geological movements, it contains structures and cracks inside. Due to the different physical and mechanical properties of the two, the seepage mechanism is different. When it is necessary to construct a vertical anti-seepage curtain in the soil and ro...

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Problems solved by technology

[0005] Due to the different construction techniques for forming anti-seepage curtains in soil and rock, the anti-seepage curtain construction technology used in soil cannot be used in rock mass, and the curtain grouting process used in rock mass should be on top of it. When the overlying soil layer exists, it is impossible to control the grout to fill the cracks in the rock mass (due to the low soil consolidation strength of the soil layer, the grout stopper cannot be placed), and it is impossible to form a complete grouting curtain in the soil layer, so that it cannot be used in the soil. body use

Therefore, when this situation is encountered, the anti-seepage curtain is generally only made in the soil. Although it can effectively achieve the purpose of vertical anti-seepage in the soil layer, it cannot prevent the groundwater from flowing around in the rock mass, and its anti-seepage effect will be reduced. Great discount, unable to meet the high requirements of vertical anti-seepage projects

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