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Extradeep extruding and ramming method

A dynamic ramming method and ramming pit technology, which is applied in soil protection, construction, infrastructure engineering and other directions, can solve the problems of high cost, few large-scale rammers, and inability to carry out construction, so as to reduce the cost, save the construction cost and Human and material resources, the effect of improving efficacy

Inactive Publication Date: 2003-09-10
SPECIAL SOFT FOUND BRANCH NO 2 CONSTR ENG CO LTD NANCHANG COUN
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  • 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

Examples

Experimental program
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Embodiment 1

[0036] Ultra-deep compaction dynamic compaction method: (1), site leveling: according to the design elevation, excavate, fill, and level the earthwork of the site;

[0037] (2), the first ramming point construction:

[0038] a. Lay-out points: according to the design requirements, position the wires and determine the tamping points;

[0039] b. One-time dynamic compaction: At the designated compaction point, use the ultra-deep compaction hammer for the first dynamic compaction construction, the static pressure value at the bottom of the hammer is about 120KPa, and the depth of the ramming pit is controlled within 3m;

[0040] c. Backfilling of the rammed pit: backfill the site soil in the rammed pit after dynamic ramming and compaction, and level the site;

[0041] d. Secondary dynamic compaction: use the ultra-deep compaction hammer to perform dynamic compaction again, and control the depth of the ramming pit within 2m;

[0042] e. Refilling of the rammed pit: Backfill the ...

Embodiment 2

[0053] The ultra-deep compaction dynamic hammer of embodiment 2 is the same as embodiment 1, and the steps (1), (2) and (3) of the ultra-deep compaction dynamic compaction method of embodiment 2 are the same as embodiment 1, but different The advantage is that:

[0054] (4), the third tamping point construction:

[0055] a. Set-out points: re-position the set-out and determine the tamping point;

[0056] b. One-time dynamic compaction: At the designated compaction point, use the ultra-deep compaction hammer for the first dynamic compaction construction. The static pressure value at the bottom of the hammer is about 120Kpa, and the depth of the ramming pit is controlled within 3m;

[0057] c. Backfilling of the rammed pit: backfill the gravel material in the rammed pit after strong compaction, and level the site;

[0058] d. Secondary dynamic compaction: use the ultra-deep compaction hammer to perform dynamic compaction again, and control the depth of the ramming pit within 2...

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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 building foundation strengthening treatment method, in particular to an ultra-deep compaction dynamic compaction method used for backfilling soil or foundation reinforcement of a deep and thick soft soil layer. Background technique [0002] In construction engineering, the foundation must be reinforced first to improve the strength, bearing capacity and stability of the foundation soil before the next step of construction can be carried out. At present, the construction party usually uses the dynamic compaction method to deal with the foundation, that is, directly uses the heavy hammer to compact the natural formation or the backfill soil with a small thickness. The dynamic compaction method can give the construction party a satisfactory effect. However, if the thickness of the backfill soil or soft soil layer is relatively large (locally even above 10m), the traditional dynamic compaction method and heavy hammer have little ...

Claims

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Application Information

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IPC IPC(8): E02D3/046E02D3/08
Inventor 刘献刚曹开伟朱沐阳
Owner SPECIAL SOFT FOUND BRANCH NO 2 CONSTR ENG CO LTD NANCHANG COUN
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