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Extradeep extruding and ramming method

A technology of dynamic ramming and ramming pits, which is applied in the fields of soil protection, construction, and infrastructure engineering. It can solve the problems of high cost, small number of large ramming machines, and inability to carry out construction, so as to reduce construction costs, save construction costs and Human and material resources, the effect of improving efficiency

Inactive Publication Date: 2005-02-16
SPECIAL SOFT FOUND BRANCH NO 2 CONSTR ENG CO LTD NANCHANG COUN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ordinary tamping machines (that is, medium and small tamping machines within 30T), which account for the vast majority of existing similar equipment in China, have poor dynamic compaction effects in deep soft soil layers, that is, loose and thick fill areas, and cannot perform deep foundation reinforcement. The number of rammers (above 50T) is small and the cost is high. It is difficult for small and medium-sized enterprises to equip them. The construction cost of large-scale ramming machines is unbearable for small and medium-sized projects. Moreover, large-scale ramming machines are heavy, and the soft soil layer of the site is low in strength and difficult to walk. unable to carry out construction

Method used

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  • Extradeep extruding and ramming method
  • Extradeep extruding and ramming method
  • Extradeep extruding and ramming method

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Ultra-deep compaction and dynamic compaction method:

[0038] (1) Site leveling: according to the design elevation, dig, fill and level the site earthwork;

[0039] (2), the first ramming point construction:

[0040] a. Pay-off point: according to the design requirements, locate the pay-off, and determine the ramming point;

[0041] b. One-time dynamic compaction: At the designated compaction point, use an ultra-deep compaction hammer to perform the first dynamic compaction construction. The static pressure at the bottom of the hammer is about 120KPa, and the depth of the compaction pit is controlled within 3m;

[0042] c. Backfilling of the rammed pit: in the compacted rammed pit, backfill the site soil and level the site;

[0043] d. Secondary dynamic compaction: Use the ultra-deep compaction hammer to carry out the dynamic compaction construction again, and the depth of the compaction pit is controlled within 2m;

[0044] e. Refilling of the rammed pit: backfill t...

Embodiment 2

[0055] The ultra-deep compaction dynamic rammer of Example 2 is the same as that of Example 1, and the steps (1), (2) and (3) of the ultra-deep compaction dynamic compaction method of Example 2 are the same as those of Example 1, but different. The point is:

[0056] (4), the third ramming point construction:

[0057] a. Pay-off point: locate the pay-off again, and determine the ramming point;

[0058] b. One-time dynamic compaction: At the designated compaction point, use an ultra-deep compaction hammer to carry out the first dynamic compaction construction. The static pressure at the bottom of the hammer is about 120Kpa, and the depth of the compaction pit is controlled within 3m;

[0059] c. Backfilling of the rammed pit: In the compacted rammed pit, backfill with sand and gravel materials, and level the site;

[0060] d. Secondary dynamic compaction: Use the ultra-deep compaction hammer to carry out the dynamic compaction construction again, and the depth of the compacti...

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Abstract

The extradeep extruding and ramming method includes leveling ground, the first spot ramming, the second spot ramming and final widespread ramming. The said reinforcing ramming process can raise effect strengthening depth by over one time without needing raising single-ramming power and elevating power of rammer compactor, raise foundation strength and stability, decrease settling volume, raise bearing capacity and reach the effects of extradeep extrusion and deep replacement. The present invention provides simplest construction method for reinforcing deep soft ground.

Description

technical field [0001] The invention relates to a construction foundation reinforcement treatment method, in particular to an ultra-deep compaction and dynamic compaction method used for backfill soil or deep soft soil layer foundation reinforcement. Background technique [0002] In construction projects, the foundation must be reinforced first to improve the strength, bearing capacity and stability of the foundation soil before proceeding to the next step of construction. At present, the construction party often uses the dynamic compaction method to deal with the foundation, that is, directly using a heavy hammer to compact the natural stratum or backfill with a small thickness. The dynamic compaction method can give the construction party a satisfactory effect. However, if the backfill or loose soil layer is thick (locally even more than 10m), the traditional dynamic compaction method and heavy hammer have little effect, and the shortcomings are obvious, that is, the reinf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D3/046E02D3/08
Inventor 刘献刚徐升才胡保根刘细则曹开伟朱沐阳
Owner SPECIAL SOFT FOUND BRANCH NO 2 CONSTR ENG CO LTD NANCHANG COUN
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