Tunneling whole-section advanced composite material casting slurry and preparation method thereof

Abstract

The invention discloses tunneling whole-section advanced composite material casting slurry and a preparation method thereof. The slurry is a mixture of modified sodium silicate and cement-based slurry. The modified sodium silicate is used as a solution A and the cement-based slurry is used as a solution B. The modified sodium silicate comprises sodium silicate and water according to a volume ratio of 1: 1. The cement-based slurry as the solution B comprises ordinary portland cement, bentonite, additives and water. The preparation method comprises a, preparing the solution A through a double-layer stirring tank as a stirring device and 2, preparing the solution B through a high-rate pulping machine, and carrying out casting on the solution A and the solution B according to a volume ratio of 1: 1 through a double-cylinder double-liquid casting pump, wherein a slurry discharge volume ratio of the solutions A to B is 1: 1. The tunneling whole-section advanced composite material casting slurry solves the problems that the traditional cement-sodium silicate casting material has poor durability and low caking strength and improves slurry uniformity and stability.

Description

technical field [0001] The invention relates to a full-section advanced composite material grouting slurry for tunnel excavation and a preparation method thereof, belonging to the technical field of automatic control. Background technique [0002] At present, according to different geological and environmental conditions, the grouting materials selected for the full-section advanced grouting reinforcement construction of the existing traditional underground excavation tunnels are also different. Organic chemical grout is expensive and not suitable for large-scale reinforcement; the commonly used cement-sodium silicate double-liquid grouting material has the characteristics of short gelation time, high consolidation rate of grout, and can be filled, reinforced, and waterproofed in time. It is widely used in projects such as advanced pre-grouting reinforcement of underground excavation tunnels and soft foundation reinforcement for the purpose of plugging. However, the cement-...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a tunnel excavation full-section advanced composite material grouting slurry and its preparation method that can overcome the above technical problems. The present invention aims at the fact that the traditional cement-sodium silicate double slurry cannot effectively take into account the formation reinforcement strength and water-stop effect As well as the stability of cement slurry, by adding a certain proportion of admixtures on the basis of cement and water glass double liquid slurry, the performance of the slurry is improved, in order to enhance the consolidation strength of the slurry, improve its durability and the stability of the cement slurry The purpose of ensuring grouting reinforcement and water-stop effect

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