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

A technology of post-wall grouting and grouting materials, which is applied in earthwork drilling, wellbore lining, tunnel lining, etc. It can solve the problems of high transportation costs of muck, a large amount of muck piled up, and expensive purchase prices, and achieve good environmental benefits , saving costs, and solving procurement difficulties

Active Publication Date: 2021-04-09
HOHAI UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0024] The earth pressure shield provided in this embodiment uses waste diorite slag to prepare grouting material behind the wall, specifically including the following steps:

[0025] (1) Repeatedly washing and soaking the dregs discharged during the excavation of the diorite stratum shield until the dregs are not muddy, and then sent to the oven for drying;

[0026] (2) The slag treated in step (1) is sent to a sieving machine for screening, and the particles greater than 0.5mm are removed by a primary sieve with an aperture of 2mm and a secondary sieve with an aperture of 0.5mm;

[0027] (3) Mix the sieved muck with the middle sand of the raw material at a ratio of 2:1 to make mixed sand. The sieved dregs replace 2 / 3 of the quality of the sand in the raw material. The raw material formula of the slurry is as follows: Obtained: 270kg of primary fly ash, 54kg of P42.5 Portland cement, 108kg of bentonite, 900kg of mixed sand (600kg of sieved dregs and 300kg of medium sand) and ...

Embodiment 2

[0030] The earth pressure shield provided in this example uses waste diorite slag to prepare grouting material behind the wall, and the difference from Example 1 is that in step (2), the raw material formula of the slurry is: 270kg primary powder Fly ash, 54kg P42.5 Portland cement, 108kg bentonite, 900kg mixed sand (540kg screened muck and 360kg medium sand) and 450kg water.

[0031] Others are the same as embodiment 1.

Embodiment 3

[0033] The earth pressure shield provided in this example uses waste diorite slag to prepare grouting material behind the wall, and the difference from Example 1 is that in step (2), the raw material formula of the slurry is: 270kg primary powder Fly ash, 54kg P42.5 Portland cement, 108kg bentonite, 900kg mixed sand (450kg screened muck and 450kg medium sand) and 450kg water.

[0034] Others are the same as embodiment 1.

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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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04E21D11/10C04B111/70
CPCC04B28/04C04B2111/70E21D11/105C04B18/08C04B14/104C04B14/06C04B18/16
Inventor 朱伟刘凤洲胡涧楠邢慧堂种记鑫刘俊秦世朋钱勇进徐超
Owner HOHAI UNIV
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