Nanometer silicon-based grouting material and application

Abstract

The invention belongs to the technical field of grouting, and discloses a nanometer silicon-based grouting material and application. The grouting material comprises a component A and a component B which are independently packaged, wherein the component A comprises 500-800 parts by weight of a main agent, 50-100 parts by weight of a modifier and 50-400 parts by weight of an accelerant, the main agent is sodium silicate and / or potassium silicate, and the component B comprises the following components in parts by weight: 100-200 parts of a cross-linking agent and 200-300 parts of an initiator. According to the invention, the nanometer silicon-based grouting material is good in construction effect, and after grout is injected into a stratum, gel can be rapidly generated to form a high-strength consolidation body with water, gravel and clay in the stratum; and the maximum strength of the gel can reach 1.2 MPa, and the gel has certain elasticity and toughness, can resist stress deformation of strata, and can play a role in long-term water stop and reinforcement.

Description

technical field [0001] The invention belongs to the technical field of grouting, and in particular relates to a nano-silicon-based grouting material and its application. Background technique [0002] Silt fine sand mainly refers to the sandy soil in which particles with a particle size of less than 0.25mm account for more than 50% of the total mass, and particles with a particle size greater than 0.075mm also account for more than 50% of the total mass. The grouting reinforcement of the silt fine sand formation is mainly to make the loose silt fine sand dense and uniform through grouting, thereby reducing the occurrence of sliding surfaces and reducing the incidence of engineering accidents such as landslides. The characteristic of grouting in silty sand formation is that the grouting material is very easy to bleed under pressure, resulting in changes in the water-cement ratio of the grout, so that the performance of the grouting material also changes. In order to produce b...

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Problems solved by technology

[0003] However, the grouting materials used in the existing silty sand formations are mainly phosphoric acid or sulfuric acid modified water glass. These materials have the following problems: 1. Pollution of groundwater, injection into formations The post-consolidation force is poor, and the compressive strength is low (0.1-0.3) MPa; 2. The durability is poor, and the stabilization effect of the formation cannot be achieved after grouting; 3. The expected water blocking and reinforcement of grouting cannot be achieved when encountering flowing water stratum effect