Early strength asater resistant dispersion and anti-dissolving shielding tunnel back lining filling material and its preparation method

A water-resistant dispersion, shield tunneling technology, applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of low strength, strength shrinkage, reduced service life, etc. Highly durable effect

Active Publication Date: 2006-11-29
武汉市城市建设投资开发集团有限公司 +3
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Problems solved by technology

The nature of the backing grouting material determines its low-strength characteristics. The traditional backing grouting material mainly uses cement mortar as the cementitious material to fill the gap between the tunnel and the surrounding rock. If the backing mortar is in the state of saturated groundwater for a long time, the chemical composition in the cement mortar is easily eroded or dissolved by the groundwater, and the strength shrinkage phenomenon will appear in less than one year of use. Compressive strength / 28d compressive strength (softening coefficient): ≤50%, the service life is greatly reduced

Method used

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  • Early strength asater resistant dispersion and anti-dissolving shielding tunnel back lining filling material and its preparation method

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Embodiment Construction

[0045] In order to better understand the present invention, the content of the present invention is further illustrated below in conjunction with the examples, but the content of the present invention is not limited to the following examples.

[0046] A method for preparing an early-strength anti-water dispersion and anti-corrosion shield tunnel backing grouting material, comprising the following steps: first weighing fly ash, slag, steel slag, metakaolin, sodium fluorosilicate, silica fume, Hydroxyethylmethyl cellulose, sand and water, then pour them into a stirring container and stir for 1 minute (min), form A liquid and transport it to the site; at the same time prepare the required water glass solution (B liquid) and store it in another In the container, but the storage time shall not exceed 1 day (d); then mix the water B liquid and A liquid in another container for 10 seconds (s) and then pour it immediately. The specific implementation examples and results are shown in T...

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Abstract

An early-strengthening grouting material for the back liner of tunnel to resist against dispersing in water and denudation is proportionally prepared from powdered coal ash, slag, steel dregs, meta-kaolin, sodium fluorosilicate, stellite, hydroxyethyl methylcellulose, sand, water, and water glass solution. Its preparing process is also disclosed.

Description

technical field [0001] The invention belongs to the class of inorganic non-metallic building materials, and in particular relates to a shield tunnel backing grouting material and a preparation method thereof. Background technique [0002] With the development of the country's economic construction, the number of underground projects is increasing, and the shield construction technology under various working conditions will face severe challenges. The performance of the backing grouting material also needs to be optimized to meet its requirements for the deformation of the surrounding rock and protection of the tunnel. The nature of the backing grouting material determines its low-strength characteristics. The traditional backing grouting material mainly uses cement mortar as the cementitious material to fill the gap between the tunnel and the surrounding rock. If the backing mortar is in the state of saturated groundwater for a long time, the chemical composition in the cem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/04C04B18/08C04B18/06C04B14/10C04B24/38
CPCC04B2111/70C04B2111/26C04B2111/00724C04B28/26Y02W30/91C04B14/06C04B14/106C04B18/08C04B18/142C04B24/383
Inventor 丁庆军陈跃庆肖龙鸽谢先启胡曙光王红喜刘招伟邓利明赵运臣田焜李勇军罗吉彭波吕林女王发洲黄小霞
Owner 武汉市城市建设投资开发集团有限公司
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