Water injection adding 10,000 kilonewton meter energy level dynamic compaction method

Abstract

The invention belongs to the foundation compaction technology field and discloses a water injection adding 10,000 kilonewton meter energy level dynamic compaction method. Water injection and humidification are performed, and hole spacing arrangement adopts a 2m quincunx arrangement form. First dynamic compaction adopts a main tamping energy level which is 10,000 kilonewton meters, and the second dynamic compaction adopts the main tamping energy level which is 10,000 kilonewton meters, and a tamping point is located at the center of a first tamping point. The tamping number of second point tamping is not less than 10 hits. In the third time, the auxiliary tamping energy level of an insertion point is 5,000 kilonewton meters, and in the fourth time, full tamping construction is performed, and tamping energy is 3000 kilonewton meters. When a water content within 5m in the invention reaches 11%-12%, through dynamic compaction, the compactness of soil is increased, and the degree of compaction reaches above 94%, and collapsibility is eliminated. After water injection +10,000 kilonewton meter dynamic compaction, most of the dry density of the soil at a detection point in an upper 5m range is improved, a compacting effect is good, a void ratio is reduced, and the collapsibility is eliminated.

Description

Technical field [0001] The invention belongs to the technical field of foundation compaction, and in particular relates to a method for dynamic compaction of water injection plus 10,000 kilonewton meters energy level. Background technique [0002] At present, the existing technology commonly used in the industry is as follows: [0003] The specification stipulates: "The natural moisture content of the soil should be less than 1% to 3% of the plastic limit when the strong Nai method is used to treat the temperature sinking loess foundation. In the soft soil layer, the natural moisture content of the soldier should be lower than At 10%, it should be humidified to close to the optimal water content; when the natural water content of the soil is greater than 3% of the plastic limit, it should be dried or other measures should be used to appropriately reduce its water content.” The soil in the arid and collapsible loess area of ​​northern Shaanxi is relatively dry, with a very low wate...

AI Technical Summary

Problems solved by technology

[0005] (1) The treatment effect of direct dynamic compaction under the energy level of the current specification is not good;

[0006] (2) In the prior art, the compaction effect is poor, the void ratio is large, and there is collapsibility

[0007] In the existing technology, the detection performance of the moisture content and dry density of the foundation is poor, resulting in the quality of the foundation of dynamic compaction cannot be guaranteed

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