In-situ grouting repairing method for cracking of loess cave dwellings in former sites

A repair method and grouting technology, applied in building maintenance, construction, building construction and other directions, can solve the problems of insufficient stability of gel time adjustment, small controllable range, poor repair effect, etc., to achieve protection and repair effect, prolong preservation Time and construction convenience

Inactive Publication Date: 2020-11-10
NORTHWEST UNIV(CN)
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  • Application Information

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Problems solved by technology

As an injection slurry, it has the advantages of high initial fluidity, low cost, low toxicity, and low pollution, but the fly in the ointment is that the adjustment of its gelation time is not stable enough, and the controllable range is small; The strength of cement is so great, and metal ions are easily peptized. Although it has excellent importability, the repair effect is poor

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  • In-situ grouting repairing method for cracking of loess cave dwellings in former sites
  • In-situ grouting repairing method for cracking of loess cave dwellings in former sites
  • In-situ grouting repairing method for cracking of loess cave dwellings in former sites

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Embodiment

[0024] An in-situ grouting repair method for cracks in loess cave dwellings at the revolutionary site in Yan'an area. The repair method is divided into four parts: grout preparation, grouting repair, waterproof bedding, and restoration and greening:

[0025] For the preparation of the slurry, liquid A is prepared with 800 mesh khaki superfine cement according to the water-cement ratio of 0.4 (that is, the quality of water is 40% of the cement weight), and fully stirred. Heat is released during mixing, and stirred until the solution returns to room temperature; liquid B uses sodium silicate solid particles and distilled water to prepare a water glass solution with a Baume degree of 22.5%; cement-water glass double slurry is A that will be cooled to room temperature Solution and B solution are thoroughly mixed and stirred.

[0026] For the above-mentioned grouting repair, grouting points should be arranged for cracks with a width of more than 8mm, and then the prepared double gr...

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Abstract

The invention discloses an in-situ grouting repairing method for cracking of loess cave dwellings in former sites. The repairing method comprises the four steps of performing slurry preparation, performing grouting repairing, performing waterproof paving and performing restoration greening. Cement-water glass double slurry is adopted, the limitation of single slurry is broken through, the advantages of cement and the advantages of water glass are combined, the liquidity and the permeability of the slurry before solidification are improved, besides, the cohesive force of the solidified slurry to a soil body is improved, and the effects that the cracks of the loess cave dwellings are repaired through in-situ grouting, and the overall stability of the cave dwellings is improved are achieved;due to the use of luteous cement, the color of the slurry is close to the color of the loess cave dwellings, so that the original appearance of the loess cave dwellings is kept after repair; besides,geotextile at the top of the cave dwellings is covered with planted grass, so that the cave dwellings have the properties of preventing seepage and preventing water and soil loss and have the effect of beautifying the environment; and compared with other grouting measures, the self-weight permeation manner of the slurry is convenient to construct and relatively low in manufacturing cost.

Description

technical field [0001] The invention relates to the field of geological engineering, in particular to an in-situ grouting repair method for cracks in loess cave dwellings at the old site. Background technique [0002] Yan'an is known as the holy land of Chinese social revolution and culture. Yan'an is one of the cities with the largest number of revolutionary sites, and there are as many as 455 preserved revolutionary sites; With unique functions, Yan'an has become a patriotic education center recognized by the central government, and China's red revolutionary history and culture are deeply accumulated on this yellow land. Most of the revolutionary sites in Yan'an were excavated in loess caves. The hills and gullies on the Loess Plateau in northern Shaanxi were formed under the special climatic conditions of the Quaternary, and have the characteristics of large pores, vertical joint development, and water sensitivity. Most of the cave dwellings have seeped and cracked for a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04G23/02C04B28/26C04B111/72
CPCC04B28/26C04B2111/00663C04B2111/72E04G23/0211C04B7/02C04B22/002
Inventor 谢婉丽左玉涛董昊宇
Owner NORTHWEST UNIV(CN)
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