Study on the performance of plastic drain board after soft foundation reinforcement by vacuum preloading method

The design method of electroosmosis-vacuum preloading for soft foundation treatment is not systematic and complete, thereby restricting the application of the technology in engineering. A design method for the electroosmosis-vacuum preloading treatment of sand-interlayered soft foundation is therefore presented. A compressible electrical prefabricated vertical drain is developed, and a vacuum sealing and draining system is designed for the application of the electroosmosis-vacuum preloading in sand-interlayered soft foundation. Calculation formulas of site resistance considering the interlayer and interface resistivity of the electrode are established to design the power supply and electrical circuit. A simple numerical simulation method is proposed to predict the ground settlement treated by electroosmosis-vacuum preloading. A field test of electroosmosis-vacuum preloading is designed using the suggested method, and comparison tests between the electroosmosis-vacuum preloading and the vacuum preloading are performed to verify the proposed technique. The test results show that the proposed design method is reasonable for the design of electroosmosis-vacuum preloading in engineering.

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Application of a Modified Vacuum Preloading Method on a Dredged Fill Soft Foundation

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.170-173.3130 ◽

2012 ◽

Vol 170-173 ◽

pp. 3130-3134 ◽

Cited By ~ 2

Author(s):

Yun Liang Cui ◽

Ming Jun Gao ◽

Zhi Hao Liu

Keyword(s):

Bearing Capacity ◽

Reinforcement Effect ◽

Large Area ◽

Vacuum Preloading ◽

Soft Foundation ◽

Short Period ◽

Dredging Sludge ◽

Made In China ◽

Preloading Method ◽

Sand Cushion

A lot of large area lands were made in China coastal areas by dredging sludge from the sea. The dredged fill ground had a very low bearing capacity which should be increased as soon as possible to meet the requirements of constructions. However, conventional vacuum preloading could not be used for this purpose because the sand cushion could not be laid on the sludge ground due to the very low bearing capacity. To solve this problem, a modified vacuum preloading method without sand cushion was proposed. This method has been successfully tested and applied in the reclamation project in Wenzhou. Based on this project, the technological process and the key technology were introduced and the reinforcement effect was analyzed. Project results showed the modified vacuum preloading method could achieve a good reinforcement effect on large area dredged fill ground in a short period. It is worth to promote the application of this method in coastal reclamation projects.

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The Applied Research of Underwater Vacuum Preloading Method in Soft Soil Foundation

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.580-583.742 ◽

2014 ◽

Vol 580-583 ◽

pp. 742-745

Author(s):

Yu Qin Feng ◽

Lu Zhang

Keyword(s):

Soft Soil ◽

Soft Ground ◽

Construction Technology ◽

Engineering Project ◽

Vacuum Preloading ◽

Soft Foundation ◽

Before And After ◽

Soil Foundation ◽

Soft Soil Foundation ◽

Preloading Method

On the basis of engineering project using underwater vacuum preloading method to strengthening the soft foundation, under the specific geological conditionsthis article analyzes the construction technology and reinforcement mechanism of underwater vacuum preloading of the soft soil foundation. By indoor soil test of Reinforcement of soil before and after processing, compared the change and improve of soil shear strength indexes before and after the reinforcement, it is verified that the underwater vacuum preloading method is a effective mean in handing soft ground, and can be further promoted as a means of handling soft ground along the coastal area of China.

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Application of Vacuum Preloading for Soft Foundation Treatment in Grain Storage

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.226-228.1359 ◽

2012 ◽

Vol 226-228 ◽

pp. 1359-1364

Author(s):

Qi Xia Liu ◽

Yang Zhao

Keyword(s):

Mechanical Performance ◽

Soft Soil ◽

Grain Storage ◽

Vacuum Preloading ◽

Obvious Effect ◽

Ground Treatment ◽

Foundation Treatment ◽

Soft Foundation ◽

Preloading Method ◽

Design Construction

The application of vacuum preloading for soft foundation treatment in grain storage is introduced from its principle, design, construction and the inspections. Its obvious effect is proved by example. The vacuum preloading method can effectively improve the soft soil foundation’s physical and mechanical performance and increase the bearing capacity of soft soil of coastal areas. For the grain storage, oil depot especially for large reserves of oil depot project, the treatment effect is remarkable. It can be widely used in the ground treatment in the soft soil area for grain storage, oil depot construction.

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