Novel compaction grouting soil nail and pull-out test device thereof

A technology of compaction grouting and pull-out test, which is applied in the test of foundation structure, sheet pile wall, building, etc., and can solve the problem of backward and limited reinforcement effect of soil, unsatisfactory soil reinforcement effect of grouting soil nails, etc. question
CN111794293AActive Publication Date: 2020-10-20TONGJI UNIV
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
TONGJI UNIV
Publication Date
2020-10-20

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Abstract

The invention belongs to the technical fields of civil engineering and geotechnical testing, and provides a novel compaction grouting soil nail and a pull-out test device thereof. The novel compactiongrouting soil nail is expanded by injecting cement slurry into special latex balls into to achieve compaction anchoring with a surrounding soil body. The pull-out test device comprises the novel compaction grouting soil nail, a test box, a grouting pressurization system, a pulling system, a measurement system and a data acquisition system and can be used for pulling tests of the novel compactiongrouting soil nail. The novel compaction grouting soil nail and the pull-out test device thereof have the beneficial effects that the novel compaction grouting soil nail can effectively avoid bleeding, penetration grouting or split grouting in the surrounding soil body; and the pull-out test device can be used for simulating compaction grouting processes under different saturation conditions and exploring the shear strength of a soil-nail interface and the response of the surrounding soil body to provide a basis for the design and safety assessment of the novel compaction grouting soil nail.
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Description

technical field

[0001] The application belongs to the technical fields of civil engineering and geotechnical testing, and in particular relates to a novel compacted grouting soil nail and a pull-out test device thereof. Background technique

[0002] At present, soil nailing, as an effective reinforcement and stabilization technology, is widely used in excavation of foundation pits, retaining walls, slope stability and foundation reinforcement projects. Traditional soil nailing is arranged in a relatively dense As the main reinforcement means of the soil, the reinforcement anchor works together with the soil and the shotcrete surface to form a reinforced composite soil, so as to achieve the purpose of reinforcement and stability.

[0003] However, the simple traditional test method has been used in the soil nail pull-out test. The test results are quite different from the actual stress-strain state of the soil nail in actual engineering use, and cannot be used to accurately r...

Claims

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