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Soft foundation reinforced structure combined by long and short drain boards and construction method thereof

A technology of soft foundation reinforcement and drainage board, which is applied in the direction of foundation structure engineering, sheet pile wall, soil protection, etc.

Inactive Publication Date: 2012-03-28
SHANGHAI STRONG FOUND ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defects in the existing vacuum preloading or surcharge preloading methods, reduce the deformation of the head of the drainage board, keep the drainage board with good water permeability and drainage capacity, and improve the effect of foundation reinforcement

Method used

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  • Soft foundation reinforced structure combined by long and short drain boards and construction method thereof
  • Soft foundation reinforced structure combined by long and short drain boards and construction method thereof
  • Soft foundation reinforced structure combined by long and short drain boards and construction method thereof

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Embodiment Construction

[0019] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0020] see figure 1 , the long drainage boards and the short drainage boards are staggered from each other on the plane and arranged in jump gears. The center of the four long drainage boards 1 is a short drainage board 2; and the center of the four short drainage boards 2 is a long drainage board1. The long drainage boards and the short drainage boards are arranged in a square or an equilateral triangle with a spacing of 0.8-1.3m. The long drainage boards and the short drainage boards are also evenly spaced in the longitudinal section.

[0021] see figure 2 , the length of the short drainage board 2 is 3-5m, and a manual or mechanical insertion board can be used; the length of the long drainage board 1 is 5-30m, and a mechanical insertion b...

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Abstract

The invention provides a soft foundation reinforced structure combined by long and short drain boards, the long drain boards and the short drain boards are staggered and arranged in way of trip stop on a flat surface respectively, the middle parts of the four long drain boards are provided with a short drain board, but the middle parts of the four short drain boards are provided with a long drain board. The construction method comprises the following construction sequences: firstly, paving a drainage sand mat; then inserting the short drain boards, wherein after surface soft soil is pre-reinforced via the short drain boards, settlement of the surface soft soil is removed partially and the strength is increased; inserting the long drain boards, which is capable of reducing bending deflections of the ends of the long drain boards; and keeping the drainage channel clear all the time, which is capable of increasing foundation reinforced effect of the deep soft foundation. Under the premise of satisfying with settlement after construction, the soft foundation reinforced structure combined by long and short drain boards can shorten construction period and save construction cost by increasing spaces among the drain boards and reducing drainage consolidation time; in the combined action of the long drain boards and the short drain boards, the foundation treatment strength is increased, the reinforced effect is more obvious, and a shell layer in a certain thickness is easy to form.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to the foundation treatment project of deep soft foundation or dredging mud filling Background technique [0002] When using methods such as vacuum preloading or surcharge preloading to strengthen the foundation of soft soil, vertical sand wells or plastic drainage boards are generally built in the foundation as drainage channels for groundwater. Drainage consolidation occurs under vacuum load preloading, pore water pressure slowly dissipates, effective stress increases slowly, foundation strength gradually increases, and foundation settlement is eliminated during construction, thus completing the process of soft soil foundation reinforcement. [0003] As a vertical drainage channel, plastic drainage board has the advantages of convenient construction and high insertion efficiency compared with sand wells, and has been widely used in a large number of soft foundation reinf...

Claims

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Application Information

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IPC IPC(8): E02D7/26E02D3/10
Inventor 毕平均刘全林宋伟民
Owner SHANGHAI STRONG FOUND ENG
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