Tunnel backing cloth slip casting material capable of preventing duct piece float upward and preparation method thereof

A grouting material and tunnel technology, which is applied in the field of building materials, can solve problems affecting the safety of the tunnel structure, loss of filling function of grout, lack of design and evaluation, etc., to achieve convenient construction management, low production cost, and prevent leakage Effect

Inactive Publication Date: 2008-09-24
WUHAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Synchronous grouting materials for ordinary shield tunnels are mainly designed to fill the ground, reduce foundation subsidence, ensure environmental safety, and serve as reinforcement layers for lining structures, but lack functional design and evaluation of materials under special site conditions, especially Under the condition of high water pressure and saturated wat

Method used

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  • Tunnel backing cloth slip casting material capable of preventing duct piece float upward and preparation method thereof
  • Tunnel backing cloth slip casting material capable of preventing duct piece float upward and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0022] A method for preparing a tunnel backing grouting material capable of preventing segments from floating up, comprising the following steps:

[0023] 1). Raw material selection: the ratio of each component is: cement: 101kg / m 3 , fly ash: 302kg / m 3 , Sand: 805kg / m 3 , water: 285kg / m 3 , silica fume: 10kg / m 3 , Bentonite: 12kg / m 3 , hydroxyethyl cellulose: 0.4kg / m 3 , polyacrylamide: 0.21kg / m 3 , Sulfamate: 0.2kg / m 3 , Naphthalene-based water reducer: 1.6kg / m 3 , sodium gluconate: 0.21kg / m 3 ; Select cement, fly ash, sand, water, silica fume, bentonite, hydroxyethyl cellulose, polyacrylamide, sulfamic acid salt, naphthalene-based water reducer and sodium gluconate, and set aside;

[0024] The cement is 42.5# ordinary Portland cement with a specific surface area greater than 350m 2 / kg; said fly ash is Class I fly ash with a density of 2.5-2.7g / cm 3 , the specific surface area is greater than 500cm 2 / g; the fineness modulus of the sand is 1.0; the specific surf...

Embodiment 2

[0027] A method for preparing a tunnel backing grouting material capable of preventing segments from floating up, comprising the following steps:

[0028] 1) Raw material selection: the ratio of each component (kg / m 3 ) is: cement: 120, fly ash: 360, sand: 960, water: 336, silica fume: 12, bentonite: 15, hydroxyethyl cellulose 0.48, polyacrylamide: 0.24, sulfamate: 0.25, Naphthalene superplasticizer: 1.92, sodium gluconate: 0.25; choose cement, fly ash, sand, water, silica fume, bentonite, hydroxyethyl cellulose, polyacrylamide, sulfamate, naphthalene superplasticizer and sodium gluconate, spare;

[0029] The cement is 42.5# ordinary Portland cement with a specific surface area greater than 350m 2 / kg; said fly ash is Class I fly ash with a density of 2.5-2.7g / cm 3 , the specific surface area is greater than 500cm 2 / g; the fineness modulus of the sand is 1.0; the specific surface area of ​​the silica fume is 20000m2 / kg; the moisture content of described bentonite4 ; Desc...

Embodiment 3

[0032] A method for preparing a tunnel backing grouting material capable of preventing segments from floating up, comprising the following steps:

[0033] 1) Raw material selection: the ratio of each component (kg / m 3 ) is: cement: 142, fly ash: 426, sand: 1120, water: 401, silica fume: 14, bentonite: 18, hydroxyethyl cellulose 0.56, polyacrylamide: 0.28, sulfamate: 0.28, Naphthalene superplasticizer: 2.24, sodium gluconate: 0.27; select cement, fly ash, sand, water, silica fume, bentonite, hydroxyethyl cellulose, polyacrylamide, sulfamate, naphthalene superplasticizer and sodium gluconate, spare;

[0034] The cement is 42.5# ordinary Portland cement with a specific surface area greater than 350m 2 / kg; said fly ash is Class I fly ash with a density of 2.5-2.7g / cm 3 , the specific surface area is greater than 500cm 2 / g; the fineness modulus of the sand is 1.0; the specific surface area of ​​the silica fume is 20000m 2 / kg; the moisture content of described bentonite4 ; D...

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Abstract

The present invention relates to tunnel-wall post-injection pulp material and a preparation method of the tunnel-wall post-injection pulp material. Tunnel back-lining pulp-injection material that can prevent the upward-floating of the duct piece is characterized in consisting of a substrate compound A and an additive compound B, wherein, the substrate compound A includes cement, fly ash, sand and water; the additive compound B includes silicone ash, swell soil, droxyethylcellulose, polyacrylamide, sulfamate, naphthaline water-reducing agent and gluconic acid sodium salt; the ratio of the ingredients (kg/m<3>): 100 to 200 portions of cement, 300 to 600 portions of fly ash, 800 to 1600 portions of sand, 280 to 560 portions of water, 10 to 40 portions of silicone ash, 12 to 30 portions of swell soil, 0.4 to 0.8 portions of droxyethylcellulose, 0.2 to 0.4 portions of polyacrylamide, 0.2 to 0.4 portions of sulfamate, 1.6 to 2.9 portions of naphthaline water-reducing agent and 0.2 to 0.4 portions of gluconic acid sodium salt. The present invention can realize the high stability, high water dispersion prevention, high-efficient water-reducing plasticity preservation and adjustable performance of the pulp-injection material the condensation under the conditions of high water pressure and water satuation, thereby greatly improving the working performance and the durance of the pulp-injection material.

Description

technical field [0001] The invention belongs to building materials, and in particular relates to a post-grouting material for a tunnel wall and a preparation method thereof. Background technique [0002] With the continuous construction of large-scale cross-river and sea tunnels at home and abroad, the shield construction technology under various working conditions will face severe challenges. In the case of large sections and high water pressure, when ordinary synchronous grouting materials are washed by water in high-pressure water-rich formations, the grouting materials will be diluted, resulting in the destruction of the material structure, not only can not play the role of filling the formation purpose, and will directly affect the stability of the segment lining structure, the slurry flows into the segment arch bottom, lifts the segment, and intensifies the uplift of the segment. At the same time, the durability of synchronous grouting material declines, making it los...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B18/08C04B14/06C04B24/38C04B24/26C04B24/16C04B24/10
CPCC04B2111/00724C04B28/02Y02W30/91C04B14/06C04B14/104C04B18/08C04B18/146C04B24/06C04B24/226C04B24/2652C04B24/383C04B40/0028C04B2103/302
Inventor 胡曙光丁庆军谢先启邓利明田焜彭波王红喜何永佳王发洲黄修林黄小霞
Owner WUHAN UNIV OF TECH
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