Controlled impermeable leaking stoppage grout-extruding water-stopping technology of strong water permeable stratum of quaternary system

Abstract

The invention provides a controlled impermeable leaking stoppage grout-extruding water-stopping technology of a strong water permeable stratum of a quaternary system, and the technology is characterized in that the smaller fluidity of serum is utilized to control the diffusion radius of the serum, the grouts are extruded at high pressure from bottom to top in a segment mode, so that the serum is extruded into a permeable stratum to block off permeable pores so as to form an impermeable curtain, thereby achieving the purpose of blocking the strong water permeable stratum. The impermeable leaking stoppage grout-extruding water-stopping grouting technology and parameters are contained. The technology is mainly applied to the impermeability of strong water permeable stratums with permeability coefficient above 1-1*10<-3>cm / s and emergent leaking stoppage treatment for surge of water bursting in foundation pits, karst water bursting, cofferdam body and foundation water stopping, water stopping in side slopes of surface mines, water bursting in water supply engineering pump station foundations, water bursting in bridge foundation pits, water bursting in foundations of high rising buildings, water bursting in river-crossing building foundations and tunnels in water conservancy and hydropower engineering and other engineering.

Description

technical field [0001] The present invention relates to the field of geotechnical engineering in hydropower, transportation, mining, and disaster control engineering disciplines, and specifically relates to highly permeable formations in engineering foundations such as dams, reservoirs, mines, building foundation pits, underground engineering, and disaster control. Controllable seepage prevention, plugging grouting and engineering emergency reinforcement treatment of Quaternary strong water-permeable strata through squeeze-in grouting and water-stop technology. Background technique [0002] For Quaternary highly permeable formations and karst foundations, inrush and water inrush control and emergency engineering treatment of water leakage often require quick results, environmental protection and economy during construction, so as to improve the overall project efficiency. In the past, drainage method, cut-off wall method and conventional grouting method were mainly used at h...

AI Technical Summary

Problems solved by technology

Among them, the effect of groundwater flow is the most unfavorable to the continuous formation of the wall, that is, when the water head is high, because the orifice is open when the spray is high, the sprayed slurry-soil mixture is under the action of the water flow, and is forced by the pressurized water flow in the hole from the weak part. Take it away, causing the wall to be discontinuous, resulting in poor overall anti-seepage effect

Therefore, it is difficult for high-spray grouting to form a continuous wall under the condition of rapid groundwater flow in the highly permeable layer, and the effect of preventing seepage and plugging in this layer cannot be achieved.

[0006] Conventional curtain grouting is to use cement slurry or clay cement slurry to pump into the grouting section by drilling holes, fill the pores in the soil layer, and then form curtains in rows to prevent water leakage. This method is used in aquifers with strong water permeability. In the interior, the irrigation area is wide, the consumption of slurry materials is large, the slurry will spread far in the layer with strong water permeability, it is difficult to form a continuous curtain in the vertical direction, the cost of investment is high, the anti-seepage effect is poor, and it is difficult to be suitable for loose aquifers The construction of internal rapid anti-seepage and plugging curtain cannot meet the needs of strong permeable strata for anti-seepage