A method for preparing grouting material behind the wall of an earth pressure shield using waste diorite slag

Abstract

The invention relates to a method for grouting material behind the wall of an earth pressure shield using waste diorite slag, which comprises the following steps: (1) cleaning and drying the slag discharged from the diorite formation shield excavation ; (2) Send the slag treated in step (1) to a screening machine for screening to remove large particles; (3) Replace part of the sieved slag with the medium sand in the grouting material after the original wall, and then Add bentonite, fly ash, cement and water to make wall grouting material. The grouting material of the present invention includes cement, fly ash, bentonite, and screened dregs, wherein the treated dregs replace part of the river sand in traditional materials, which solves the problem of difficulty in purchasing medium sand in Jinan, and is The invention provides an economical and environment-friendly process method of muck reuse.

Description

technical field [0001] The invention belongs to the technical field of inorganic non-metallic building materials, and relates to a grouting material method for preparing walls of an earth pressure shield using waste diorite slag. Background technique [0002] With the continuous development of my country's urban rail transit, subway construction has entered a peak period, and earth pressure balance shield technology is a widely used construction method in subway construction. In the process of earth pressure shield construction, with the continuous excavation of the shield machine, a large amount of muck is inevitably produced, and the transportation of muck requires high transportation costs, and most projects are faced with a large amount of dregs piled up At the same time, the medium sand and mud content in Jinan area is high, and the purchase price is expensive. [0003] In the process of excavating weathered diorite strata, the weathered rock is ground into sandy soil ...

AI Technical Summary

Problems solved by technology

In the process of earth pressure shield construction, with the continuous excavation of the shield machine, a large amount of muck is inevitably produced, and the transportation of muck requires high transportation costs, and most projects are faced with a large amount of dregs piled up At the same time, the medium sand and mud content in Jinan area is high, and the purchase price is expensive

[0003] In the excavation process of the weathered diorite stratum, the weathered rock is ground into sandy soil when the cutter head is excavated. At present, the treatment of these diorite slags is usually carried out, usually transported to the slag for consumption. Not only the transportation cost is high, but also a large amount of muck is piled up

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