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High vacuum well-points dewatering groundwork treatment method by shallow ramming compaction and deep blasting compaction

A technology for well point dewatering and foundation treatment, which is applied in infrastructure engineering, soil protection, construction, etc., can solve the problems that the ultra-static pore water pressure is not easy to dissipate, cannot function on soft soil foundation, and cannot be popularized on a large scale. The effect of foundation reinforcement is good, the construction efficiency is high, and the cycle is short

Inactive Publication Date: 2009-08-26
刘汉龙 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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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  • High vacuum well-points dewatering groundwork treatment method by shallow ramming compaction and deep blasting compaction
  • High vacuum well-points dewatering groundwork treatment method by shallow ramming compaction and deep blasting compaction

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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 for shallow layer vibratory compaction and deep layer explosive compaction combined with high vacuum well point dewatering, which is characterized in that it adopts underground deep layer explosive compaction and ground mechanical vibration or dynamic compaction for shallow layer compaction and high A combination of vacuum well point dewatering is used to treat large-area soft soil foundations. The advantages and effects of the present invention are: through the organic optimization combination of three technologies, the combination of mechanical rolling vibration or dynamic compaction and deep drilling explosion strong drainage and vacuum well point strong precipitation effectively strengthens large-area shallow and deep layers For soft soil foundation, the treatment depth can reach more than 18 meters, especially suitable for foundation reinforcement of dredger fill, silt foundation, soft clay and silt or silt interlayer foundation. The method has the advantages of fast construction speed, low reinforcement cost, simple and convenient operation, high construction efficiency and good foundation reinforcement effect.

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 high-vacuum 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 trea...

Claims

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Application Information

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