Method of reinforcing soft soil foundation by gas extrusion drainage and used gasbag

A soft soil foundation and airbag technology, applied in soil protection, infrastructure engineering, construction, etc., to achieve the effects of low energy consumption, good reinforcement effect, and short reinforcement time

Inactive Publication Date: 2007-09-12
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The various mature and common soft foundation reinforcement methods mentioned above have their own advantages and disadvantages and their applicability

Method used

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  • Method of reinforcing soft soil foundation by gas extrusion drainage and used gasbag
  • Method of reinforcing soft soil foundation by gas extrusion drainage and used gasbag
  • Method of reinforcing soft soil foundation by gas extrusion drainage and used gasbag

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Experimental program
Comparison scheme
Effect test

Embodiment approach

[0021] When using this kind of airbag to reinforce the soft soil foundation, the implementation method is as follows:

[0022] (1) Exhaust the gas in the two airbag cavities to make the airbag shrink, and then insert the airbag vertically into the soft soil foundation soil layer that needs to be reinforced by using the insertion rod.

[0023] (2) Inflate the two airbag cavities from bottom to top. The air pressure in the lower airbag cavity is controlled at 300kPa, and the air pressure in the upper airbag cavity is controlled at 200kPa. Regularly observe the air pressure in the airbag cavity every day. Infuse air in the airbag cavity to maintain the above-mentioned air pressure in the airbag cavity; this lasts for 10 to 20 days, and the pore water in the soil layer with a radius of 3.0m around the airbag can be partially discharged to achieve compactness; after that, the gas in the airbag cavity is released, and the airbag shrink.

[0024] (3) During the contraction process o...

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Abstract

The invention discloses a method to reinforce soft foundation based on gas pressing discharging and its gasbag. The method is: exhaust gas in cavity of inflatable body and put it into the reinforced soft foundation. Utilize inflatable body to press soil layer for a period of time and release gas in cavity when the soil layer reach density requirement. Take the inflatable body out of soil layer and fill the hole with soil. The gasbag in this method is composed of gasbag body with elastic multi-cavity and inserted link. The inner layer of gasbag is rubber and external layer is lyophobic textile. Both layers are adhered by glue. The invention has reused gasbag, small energy composing of pressing discharging, small composition of sandstone and low comprehensive cost. It has great concretion pressure, short reinforced time and good reinforced effect, which can be applied in reinforcing soft foundation of different fields and ranges.

Description

technical field [0001] The invention relates to a method for strengthening soft ground by air extrusion drainage and an air bag used. The invention belongs to a method and a device for strengthening soft ground in the field of geotechnical engineering. Background technique [0002] At present, there are many methods for strengthening the soft soil foundation, such as sand and gravel replacement method, cement mixing reinforcement method, surcharge preloading method, vacuum preloading method, etc. Sand and gravel replacement method is a method of replacing all or part of the soft soil layer with sand and gravel to improve the bearing capacity of the foundation. This method is effective, but the cost is high, and it is not suitable for large-scale soft foundation reinforcement in areas where sand and gravel are scarce. The cement mixing reinforcement method is to mix cement slurry or dry cement powder evenly with soft soil to form cement soil. The c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/02
Inventor 别社安
Owner TIANJIN UNIV
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