65results about How to "High rate of stones" patented technology

The invention discloses a tunnel water inrush prevention and treatment method. The method comprises the following steps of geological forecasting of water inrush areas; construction of water inrush channels; excavation of faults or water-rich sections; grouting, sealing and reinforcement; and treatment of water inrush and mud gushing positions. The tunnel water inrush prevention and treatment method provided by the invention can predict and forecast in advance, strengthen advanced support management, especially grouting management, block mud and water inrush channels, ensure that the consolidation and stone rate enhancement are first achieved, and excavation are then carried out after surrounding rock reinforcement and water permeability reduction, and ensure that the flow of water does not cause cracks to open as well as sidewalls and roof collapse, thereby ensuring the safe use of tunnels.

The invention discloses a like concrete filling material suitable for road large cavity goaf treatment. The material comprises 32.5 grade slag Portland cement, fly ash, medium sand, gangue and a high efficiency water reducer, and a ratio of water to cement to fly ash to medium sand to gangue is 12.4:3.2:12.05:12.05:60.3. The density of like concrete is greater than the density of water, so underground water residual in large cavities is discharged; and the like concrete has a high concretion rate, so large goaf is filled and densified to realize no future troubles. Ingredients of the like concrete are changed to valuables, so the like concrete filling material saves resources, protects environment, can meet pumping transmission demands, and has very good economic benefits and social values.

The invention provides a high-waterproofness synchronous grouting slurry for submarine shield tunnels. The high-waterproofness synchronous grouting slurry comprises the following components as raw materials in percent by weight: 7.0-9.5% of a cementing material, 14.5-17.5% of ground limestone powder, 2.6-4.2% of sodium-based bentonite, 55-60% of river sand, a waterproofing agent of which the usingamount is 3.0% of that of the cementing material, a water reducing agent of which the using amount is 1.0% of that of the cementing material, hydroxypropyl methyl cellulose of which the using amountis 0.5% of that of the cementing material, polyacrylamide of which the using amount is 0.1% of that of the cementing material, an air entraining agent of which the using amount is 0.03% of that of thecementing material, and the balance of water, wherein the cementing material comprises cement and slaked lime according to a mass ratio of (4.0-5.5):(3.0-4.0). The high-waterproofness synchronous grouting slurry provided by the invention has relatively high waterproofness, relatively high early shear strength and strong seawater seepage resistance, and can provide certain shear resistance, so that the problems of floating of duct pieces and cracking-caused water seepage can be effectively solved and a role in stabilizing the duct piece is played.

The invention discloses controllable clay and cement seepage-proof reinforcement paste. The controllable clay and cement seepage-proof reinforcement paste is mainly prepared from clay raw stock, cement and water, wherein the clay raw stock is mainly obtained by stirring clay and water. A modifier is added in the controllable clay and cement seepage-proof reinforcement paste; the doping amount of the modifier is 1 to 3 percent; the modifier mainly comprises mineral additives, sulfate and bentonite in a mass ratio of a:b:c; and a:b:c is 5:(5-0):(0-5). The product has the advantages of high stability and water flow dilution resistance, controllable setting time, adjustable strength, high antiseepage performance, low cost, environment friendliness and the like.