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Filling paste slurry suitable for tunnel construction goaf

A technology for tunnel construction and filling paste, which is applied in the field of grouting for underground engineering treatment, can solve the problems that the grouting effect is greatly affected by the construction level, the early strength of cement fly ash slurry is low, and the slurry filling process is complicated, and the setting time is reached. Controllable, satisfying filling processing requirements, and convenient and quick preparation

Active Publication Date: 2017-05-31
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, ordinary cement slurry has defects such as low slurry stone rate and poor water dispersion resistance; the early strength of cement fly ash slurry is low, and the source of fly ash is limited; the setting time of cement-sodium silicate double liquid slurry is difficult to control , the grouting process is more complicated, and the grouting effect is greatly affected by the construction level

Method used

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  • Filling paste slurry suitable for tunnel construction goaf
  • Filling paste slurry suitable for tunnel construction goaf
  • Filling paste slurry suitable for tunnel construction goaf

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The present invention is applicable to an embodiment of the filling slurry for tunnel construction gobs, and the filling slurry is mainly prepared from clay raw slurry, cement and water. Among them, the original clay and water are used to make clay pulp with a clay pulper, the specific gravity of the clay pulp is 1.20, the quality of the clay pulp is 7.2kg, the plasticity index of the clay is not less than 14, and the particle size of the clay is less than 0.005mm The number of cosmids is not less than 30%. The cement is ordinary Portland cement 42.5, the sieve residue of the cement after passing through the 80μm square hole sieve is not more than 5%, the quality of the cement is 2.5kg, and the mass ratio of clay stock to cement is 2.88:1. The amount of water added was 21.6 kg. Also be added with modifying agent in this filling paste, this modifying agent comprises quick-setting agent sodium metaaluminate and water-reducing agent calcium lignosulfonate, wherein, the in...

Embodiment 2

[0031] The present invention is applicable to an embodiment of the filling slurry for tunnel construction gobs, and the filling slurry is mainly prepared from clay raw slurry, cement and water. Among them, the original clay and water are used to make clay pulp with a clay pulper, the specific gravity of the clay pulp is 1.25, the quality of the clay pulp is 7.5kg, the plasticity index of the clay is not less than 14, and the particle size of the clay is less than 0.005mm The number of cosmids is not less than 30%. The cement is ordinary Portland cement 42.5, the sieve residue of the cement after passing through the 80μm square hole sieve is not more than 5%, the quality of the cement is 3.5kg, and the mass ratio of clay slurry to cement is 2.14:1. The addition amount of water is 15kg. Also be added with modifying agent in this filling paste, this modifying agent comprises quick-setting agent sodium metaaluminate and water reducer calcium lignosulfonate, wherein, the mixing am...

Embodiment 3

[0034] The present invention is applicable to an embodiment of the filling slurry for tunnel construction gobs, and the filling slurry is mainly prepared from clay raw slurry, cement and water. Among them, the original clay and water are used to make clay pulp with a clay pulper, the specific gravity of the clay pulp is 1.30, the quality of the clay pulp is 7.8kg, the plasticity index of the clay is not less than 14, and the particle size of the clay is less than 0.005mm The number of cosmids is not less than 30%. The cement is ordinary Portland cement 42.5, the sieve residue of the cement after passing through the 80μm square hole sieve is not more than 5%, the quality of the cement is 3.5kg, and the mass ratio of clay slurry to cement is 2.22:1. The amount of water added was 11.7 kg. Also be added with modifying agent in this filling paste, this modifying agent comprises quick-setting agent sodium metaaluminate and water reducer calcium lignosulfonate, wherein, the mixing a...

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Abstract

The invention discloses a filling paste slurry suitable for a tunnel construction goaf. The filling paste slurry is mainly prepared from a clay mud, a cement and water; the clay mud is prepared by stirring clay and water, a modifier is added in the filling paste slurry, the modifier comprises meta-aluminate and lignosulfonate, the mixing amount of the meta-aluminate is 0.5-1.5% of the mass of the cement, and the mixing amount of the lignosulfonate is 0.2-0.4% of the mass of the cement. The filling paste slurry is high in stone rate, has a good filling effect, and is environmentally friendly, convenient to prepare, and suitable for filling the tunnel construction goaf, the raw materials are cheap and easy to get, the setting time is controllable, the on-site construction operation is simple, and then a tunnel safely goes through the goaf.

Description

technical field [0001] The invention belongs to the technical field of grouting for underground engineering treatment, and in particular relates to a novel filling slurry suitable for filling treatment of gobs in tunnel construction. Background technique [0002] The construction of tunnels in goaf areas often faces the risk of water and mud inrush and tunnel face collapse, which brings construction difficulties to the construction of tunnels. The stratum in the goaf is loose and in an unstable state, and the disturbance of the tunnel excavation is likely to cause the tunnel to collapse. The gob above the tunnel is likely to cause water and mud inrush or face collapse, while the gob below is likely to cause tunnel collapse. At present, grouting filling is widely used in engineering practice to deal with gobs. [0003] The commonly used grouting materials for gob grouting filling treatment in current engineering include: ordinary cement slurry, cement fly ash slurry and cem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/00017C04B2111/00724C04B2111/70C04B2201/50C04B14/10C04B22/08C04B24/18
Inventor 阳军生李丰果钟玉明蒋登学张聪张箭叶新田欧力强章怡刘守花
Owner CENT SOUTH UNIV
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