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Method for consolidating mud soft base by explosion and piling prepressing united drainage

A technology of drainage consolidation and surcharge preloading, which is applied in soil protection, infrastructure engineering, construction, etc., can solve the problems of poor engineering application and poor consolidation effect, so as to improve the consolidation rate and accelerate the matrix The effect of drainage

Inactive Publication Date: 2008-12-10
北京中科力爆炸技术工程有限公司
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  • Description
  • Claims
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Problems solved by technology

However, it is not very successful in engineering application, mainly because in the later stage of the explosion, the consolidation effect of only relying on the self-weight drainage of the soft foundation is poor.

Method used

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  • Method for consolidating mud soft base by explosion and piling prepressing united drainage

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Lay the geotextile manually; lay a 50cm-thick sand cushion 2 on the geotextile 1, and use clean medium-coarse sand as much as possible for the sand cushion. Explosive packs 4 are vertically buried in the center of each grid. In order to prevent the explosives from getting wet, waterproof explosives are generally used. The charge of the packs is controlled at about 150g. The distance between the uppermost charge and the surface layer of the silt 6 is 3.5-4.5m; after the charge is detonated, the stone material 5 is preloaded on the sand cushion layer 2, and the stone material can be stacked in layers to control the loading speed and prevent the silt Shearing damages the drainage board and sideslip. One month after the completion of the first riprap loading, the second loading will be carried out, and the number of loadings will be controlled according to the needs of the project.

Embodiment 2

[0020] Insert plastic drainage boards 3 on the laid sand cushion layer 2, the plastic drainage boards 3 are arranged in a grid pattern, the distance between the drainage boards is 2-2.5m, and the vertical direction runs through the full thickness of the soft foundation and is buried in the underlying layer 7 , the upper end is 20cm higher than the drainage sand cushion; before detonating the explosive package, load stone 5 on the sand cushion 2, and the rest of the operations are the same as in Example 1.

[0021] In the later stage of the explosion, due to the long-term extrusion effect of the surcharge preload, the water in the matrix can be discharged more thoroughly, and the consolidation efficiency is higher.

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Abstract

The invention relates to a method for exploding, piling-loading, preloading, combining, draining and consolidating muddy soft ground. The method comprises the following steps that: a vertical drainage channel is arranged in the soft ground first; a plane of the drainage channel is arranged according to grids; explosive packages are buried in silt in the center of the grid; stone is loaded on a sand cushion; the amount of the loaded stone cannot cause the shear failure and sideslip of the silt; and the drainage rate and consolidation rate of the muddy soft ground are improved by utilizing the explosion of the explosive packages and the functions of piling-loading, combining, squeezing silt and draining. The method is implemented, which solves the technical problems that: a single explosion-drainage-consolidation method for treating the muddy soft ground is poor in drainage-consolidation effect due to depending on the dead weight of a matrix during the later period of explosion, and is long in construction period. After the explosion, the drainage of the matrix is speeded up through layering, piling-loading and preloading, which improves consolidation rate.

Description

technical field [0001] The invention belongs to the application technical field of consolidation treatment of muddy soft foundation, in particular, relates to a method for consolidating muddy soft foundation by explosion, surcharge preloading and combined drainage. Background technique [0002] At present, there are mainly surcharge preloading and vacuum preloading drainage consolidation methods in engineering to deal with silt soft foundations, but these two methods have a long construction period and the drainage consolidation effect is not very ideal. Based on this, many experts and scholars are studying explosive drainage consolidation, a new method for dealing with soft foundations. This method has the characteristics of fast drainage and consolidation speed, large depth of foundation treatment, and low cost of foundation treatment engineering. But it is not very successful in engineering application, mainly because in the later stage of the explosion, the consolidatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/02E02D3/10
Inventor 李江国王峰王代华刘永强彭海明李松
Owner 北京中科力爆炸技术工程有限公司
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