High-water-pressure super-large-diameter underwater shield tunnel double-liquid grouting slurry, process and application

A super-diameter, shield tunneling technology, used in tunnels, tunnel linings, underground chambers, etc., can solve the problems of poor strength and toughness, low mud water retention rate, poor filling effect, etc., to improve strength and improve impermeability. performance, the effect of increasing fill retention

Active Publication Date: 2022-03-15
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although domestic shield grouting materials have a certain research basis, the double-fluid grouting grout behind the wall of the domestic high-water-pressure super-large-diameter underwater shield tunnel is still immature, and there are high-pressure hydrodynamic scours, low retention rate of muddy water, and easy Problems such as pipe plugging, poor filling effect, poor strength and toughness, and poor impermeability

Method used

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  • High-water-pressure super-large-diameter underwater shield tunnel double-liquid grouting slurry, process and application
  • High-water-pressure super-large-diameter underwater shield tunnel double-liquid grouting slurry, process and application
  • High-water-pressure super-large-diameter underwater shield tunnel double-liquid grouting slurry, process and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] A double-liquid grouting slurry for super-large-diameter underwater shield tunneling under high water pressure, which is composed of slurry one and slurry two, and the slurry one is made of the following raw materials in parts by weight: Portland cement clinker 42 parts; granulation 22 parts of blast furnace slag; 30 parts of fly ash; 21 parts of steel slag; 8 parts of bentonite; 7 parts of limestone tailings; 1 part of water reducing agent; Raw materials in parts by weight: 3 parts of chopped fiber; 98 parts of sodium silicate solution; 3.5 parts of viscous high polymer. The water reducer is a mixture of naphthalene-based water reducer and polycarboxylate water reducer with a mass ratio of 3:2, and the chopped fibers are chopped basalt fibers and chopped polypropylene with a mass ratio of 2:1. A mixture of fibers, the viscous high polymer is a mixture of acrylate polymer, ethylene-vinyl acetate copolymer and polyvinyl alcohol in a mass ratio of 1:1.5:1.

[0075] The p...

Embodiment 2

[0107] A double-liquid grouting slurry for super-large-diameter underwater shield tunneling with high water pressure, which is composed of slurry 1 and slurry 2, wherein the water reducing agent is polycarboxylate water reducing agent, the cellulose is hydroxypropyl methylcellulose, and the The cut fibers are chopped basalt fibers, and the viscous high polymer is an acrylate polymer, and the same as in Example 1 except that.

[0108] The preparation process of the double liquid grouting slurry is the same as in Example 1.

[0109] The slurry one and the slurry two are mixed according to the volume ratio of 5:1, and the performance of the mixed double slurry is tested according to the method of embodiment 1, and the results are shown in table 4 below:

[0110]

Embodiment 3

[0112] A double-liquid grouting slurry for super-large-diameter underwater shield tunneling with high water pressure, which is composed of slurry 1 and slurry 2, wherein the water reducer is naphthalene-based water reducer, the cellulose is hydroxypropyl methylcellulose, chopped The fiber is a chopped polypropylene fiber, and the viscous high polymer is an ethylene-vinyl acetate copolymer, except that it is the same as in Example 1.

[0113] The preparation process of the double liquid grouting slurry is the same as in Example 1.

[0114] The slurry one and the slurry two are mixed according to a volume ratio of 5:1, and the performance of the mixed double slurry is tested according to the method of Example 1, and the results are shown in Table 5 below:

[0115]

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Abstract

The invention discloses a high-water-pressure super-large-diameter underwater shield tunnel double-liquid grouting slurry, and a process and application thereof. The slurry I is prepared from the following raw materials: 35-45 parts of cement clinker; 15 to 25 parts of slag; 24 to 35 parts of fly ash; 15-25 parts of steel slag; 5 to 15 parts of bentonite; 4-10 parts of limestone tailings; 0.3-2 parts of a water reducing agent; 0.5 to 2.5 parts of cellulose; the slurry II is prepared from the following raw materials in parts by weight: 0.2-3.8 parts of chopped fibers; 96-99 parts of a sodium silicate solution; and 0.8-4.8 parts of a viscous high polymer. A double-slurry preparation process of crushing, screening, grinding, grouped mixing and grouped stirring at different speeds is formed, the volume ratio of the slurry I to the slurry II is (1: 1)-(10: 1) during grouting, the slurry is injected into a shield gap through the grouting process of shield tail six-point location and segment 3 + 2 + 1 splicing synchronization, and the grouting method can be applied to a high-water-pressure super-large-diameter underwater shield tunnel with the water pressure larger than or equal to 0.5 MPa and the diameter larger than or equal to 14 m.

Description

technical field [0001] The invention relates to a double-fluid grouting slurry for a super-large-diameter underwater shield tunnel under high water pressure and its technology and application, in particular to a high-pressure dynamic water anti-scouring rate, a high retention rate of muddy water filling, high early strength, and high toughness. The invention relates to a double-fluid grouting grout with good anti-permeability and good effect of preventing segment deformation and its technology and application, which belong to the technical field of tunnel and underground engineering shield grouting. Background technique [0002] With the continuous and rapid development of transportation infrastructure and urban construction, large-diameter shield construction has increasingly become the mainstream method for the construction of underwater tunnels and underground projects across rivers, seas, and rivers. After excavation by the shield method, there is a certain gap between t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/26E21D11/10C04B111/70
CPCC04B28/26E21D11/105C04B2111/70C04B2201/50C04B7/02C04B18/142C04B18/08C04B14/104C04B18/12C04B2103/302C04B24/383C04B14/4643C04B16/0633C04B24/2641C04B24/2623Y02W30/91C04B18/141C04B28/04C04B28/08C04B12/04C04B18/146C04B24/226C04B22/064C04B22/143C04B24/2647C04B24/122C04B24/2652C04B14/047C04B22/10C04B14/28C04B14/4668C04B2111/00146C04B2111/74
Inventor 沙飞孔昊刘涛席明帅林国庆卜蒙范锐顾世玖
Owner OCEAN UNIV OF CHINA
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