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Geogrid combined grouting electro-osmosis construction method for ultra-soft soil

A geogrid and ultra-soft soil technology, which is applied in soil protection, infrastructure engineering, construction, etc., can solve problems such as long construction period, reinforcement effect is difficult to meet time and design requirements, and geogrid cannot bear large-scale mechanical operations. , to achieve a reasonable moisture content, improve the status quo of disengagement, and reduce the effect of uneven settlement

Active Publication Date: 2016-06-08
ZHEJIANG UNIV
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Problems solved by technology

However, when it is used in ultra-soft soil such as dredged silt soil, it is generally used as a cushion material for the construction surface, and the pre-loading consolidation method is used after laying vertical drainage and horizontal drainage channels, but only geogrid cannot Carrying large-scale mechanical operations, this method has a long construction period, and the reinforcement effect is difficult to meet the time and design requirements

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  • Geogrid combined grouting electro-osmosis construction method for ultra-soft soil
  • Geogrid combined grouting electro-osmosis construction method for ultra-soft soil

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Embodiment

[0033] like figure 1 , 2 As shown, a geogrid joint grouting ultra-soft soil electroosmosis construction method, first, design the site area to be constructed according to the engineering plan, including:

[0034] (1) Use dredging engineering machinery to blow fill the silt soil at half the design height, use bamboo mesh frame geogrid 8 to reinforce the silt soil layer on the silt surface layer, and lay geotextile on the surface layer;

[0035] (2) Use dredging engineering machinery to blow fill the remaining half of the silt soil, and then use the bamboo mesh frame geogrid 8 to reinforce the silt soil layer on the silt surface layer and lay geotextiles on the surface layer;

[0036] (3) Arrange a certain number of grouted iron pipes as the anode 2 on one side of the ultra-soft soil site 1 according to the designed spacing, and arrange a certain number of grouted iron pipes as the cathode 3 on the opposite side according to the designed spacing, and the electrode spacing is be...

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Abstract

The invention discloses a geogrid combined grouting electro-osmosis construction method for ultra-soft soil. The geogrid combined grouting electro-osmosis construction method for ultra-soft soil comprises the following steps: carrying out hydraulic reclamation of mud soil by using hydraulic reclamation construction machinery, performing reinforcement on the mud soil layer at the surface layer of the mud by using a geogrid, and paving geotextile on the surface layer; arranging grouting iron pipes as a positive electrode and a negative electrode; connecting a grouting pump and a horizontal grouting guide pipe by means of a connecting valve, and connecting the horizontal grouting guide pipe with top ends of the grouting iron pipes of the positive electrode and the negative electrode; arranging a drainage main pipe and pumping equipment in an ultra-soft soil place on one side where the cathode is arranged; and switching on the power for electro-osmosis. The geogrid combined grouting electro-osmosis construction method for ultra-soft soil is capable of changing the present situation of separation of electrodes and soil mass, effectively increasing the effective electric potential at the later stage of electro-osmosis, increasing the overall current intensity, and also correspondingly increasing the drainage rate; compared with treating ultra-soft soil by using a conventional electro-osmosis method, the integrity of the soil mass is enhanced by the geogrid, and the efficiency at the later stage of electro-osmosis is improved by the grouting technology; in addition, by means of void filling, differential settlement can also be effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of ultra-soft soil foundation treatment, and in particular relates to a drainage reinforcement method for reducing the gap between the electroosmotic electrode and the soil body and improving the integrity and bearing capacity of the soil body by combined grouting of geogrid, which is mainly suitable for coastal silt Engineering technology fields such as soil and dredger fill foundation treatment. Background technique [0002] Coastal muddy soil and dredger fill have high water content, poor permeability, high compressibility, low bearing capacity and long consolidation time. With the demand of economic development in coastal areas, there is more and more demand for reinforcement treatment of ultra-soft soil. Compared with other traditional treatment methods, electroosmosis has significant advantages in the treatment of coastal soft clay and dredging fill, so it is widely used in coastal areas. [0003] In...

Claims

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Application Information

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IPC IPC(8): E02D3/11E02D3/00
CPCE02D3/005E02D3/11E02D2300/0084
Inventor 谢新宇臧俊超郑凌逶李卓明
Owner ZHEJIANG UNIV
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