Foundation treatment method combining vibration ramming compaction at shallow layer and blasting compaction at deep layer with well-point dewatering

A technology for well point dewatering and foundation treatment, which is applied in infrastructure engineering, soil protection, construction, etc. It can solve the problem that the ultra-static pore water pressure is not easy to dissipate, cannot function on soft soil foundation, and cannot achieve soil consolidation, etc. problems, to achieve the effect of good foundation reinforcement, high construction efficiency and low cost

Inactive Publication Date: 2009-09-23
刘汉龙 +1
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Therefore, above-mentioned patented method can only produce effect to shallow soft soil foundation within 10 meters, and can't produce effect to soft soil foundation more than 10 meters, and its application is restricted, just can't promote on a large scale
Explosion compaction method is one of soft soil foundation reinforcement methods. It mainly generates shock waves through the explosion inside the soft soil to cause soft soil compaction. At the same time, the explosion also produces super static pore water pressure. However, if there is no drainage channel or the channel is not smooth, The ultra-static pore water pressure is not easy to dissipate and cannot achieve the purpose of soil consolidation

Method used

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  • Foundation treatment method combining vibration ramming compaction at shallow layer and blasting compaction at deep layer with well-point dewatering
  • Foundation treatment method combining vibration ramming compaction at shallow layer and blasting compaction at deep layer with well-point dewatering

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Experimental program
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Effect test

Embodiment 1

[0027] Such as figure 1 , 2 , insert the well point pipe 1 vertically in a large area in the reinforced area, the well point pipe is inserted to a depth of 8-18m, the well point pipe 1 is connected to the main water collection pipe 2, the main water collection pipe 2 is connected to the vacuum pump 3, and the vacuum pump 3 is started to drain water The groundwater table is lowered, and the shallow foundation soil is consolidated. Pull out the well point pipe, arrange vibratory rolling machine 4 or dynamic ramming equipment 5 on the ground of the reinforced area, start the vibratory rolling machine 4 or dynamic ramming equipment 5 to make the shallow foundation soil in the reinforced area compact, and make the shallow layer The pore water in the soil skeleton is precipitated. Withdraw the vibratory rolling machine or dynamic compaction equipment, and drill a number of explosion holes 6 to 8 to 18m with a drilling rig. The explosion holes 6 are arranged in a triangle or quincu...

Embodiment 2

[0029] Such as figure 1 , 2 , insert the well point pipe 1 vertically in the reinforced area, the insertion depth of the well point pipe is 8-18m, the well point pipe 1 is connected to the main water collection pipe 2, the main water collection pipe 2 is connected to the vacuum pump 3, and the vacuum pump 3 is started to drain water to reduce the groundwater level , the shallow foundation soil is consolidated; the well point pipe is pulled out, and the well point explosion holes are drilled with a drilling rig for 6 to 8 to 18m. 6. Place one or several vertical tubular explosive packs 7 and lead out fuses 8 along the depth. The explosive packs 7 are blocked and separated with sand and gravel 9. The explosives in the packs are water-resistant plastic explosives, and the fuses 8 are ignited. Initiate the explosive package 7 in the blast hole of the deep foundation, make the deep foundation soil compact, and make the pore water in the deep soil skeleton separate out; arrange the...

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Abstract

The invention relates to a foundation treatment method combining vibration ramming compaction at a shallow layer and blasting compaction at a deep layer with well-point dewatering, which adopts a manner of combining the blasting compaction at the deep layer underground, ground machine vibration or forced ramming shallow-layer compaction and high vacuum well-point dewatering so as to conduct large-area soft soil foundation treatment. The method comprises the steps of: bestrewing the ground surface of the consolidated foundation region with well point pipes and starting a vacuum pump for drainage; pulling out the well point pipes, using a drilling machine for drilling a plurality of blasting holes, placing blasting charges at places of different depths along the interiors of the blasting holes, leading out a blasting fuse, igniting the blasting fuse and detonating the blasting charges inside the blasting holes of deep foundation; arranging a vibration compacting machine or forced ramming equipment on the ground surface of the consolidated foundation region and starting the vibration compacting machine or the forced ramming equipment; and withdrawing the vibration compacting machine or the forced ramming equipment, bestrewing the ground surface of the consolidated foundation region with the well point pipes and starting the vacuum pump for drainage. The method has the characteristics of short construction period, low construction cost, deep treatment depth and the like.

Description

technical field [0001] The invention relates to a large-area deep soft soil foundation treatment method, in particular to a shallow-layer vibratory compaction and deep-layer explosive compaction combined well point dewatering foundation treatment method. It belongs to the technical field of foundation treatment. Background technique [0002] Before the present invention was made, ZL01127046.2 described a soft ground treatment method of high vacuum compaction method in the large-area soft ground treatment method, that is, the method of high vacuum well point precipitation plus vibration rolling or dynamic compaction is used to reduce the The water content of the treated soil is used to improve the compactness of the soil. The inventive method has short construction period, low construction cost and good treatment effect. The main disadvantage of this method is that due to the limited energy of vibration rolling or dynamic compaction, the depth of foundation treatment is sha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/02E02D3/10E02D3/046
Inventor 刘汉龙徐士龙
Owner 刘汉龙
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