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Reinforcing dredger fill foundation construction method combining drainage well and air pressure splitting

A construction method and technology for dredging wells, which are applied in basic structure engineering, soil protection, construction, etc., can solve the problems of slow consolidation rate, difficult reinforcement, and long reinforcement time, and improve efficiency, eliminate well resistance, and speed up The effect of water outlet speed

Inactive Publication Date: 2013-12-11
SOUTHEAST UNIV
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Problems solved by technology

Due to the well resistance effect of the dredging well, the drainage decays quickly over time. Generally, the effective treatment depth and width are mostly 3-5m. For large-scale dredging and filling soil foundations, it is difficult to effectively reinforce the deep and wide parts.
(2) Dehydration requires a long reinforcement time
For dredger fill soft soil with small permeability coefficient, its consolidation rate is still slow, and it often takes several months

Method used

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  • Reinforcing dredger fill foundation construction method combining drainage well and air pressure splitting
  • Reinforcing dredger fill foundation construction method combining drainage well and air pressure splitting

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Embodiment

[0022] Embodiment: The construction method of dredging well combined with air pressure splitting to strengthen dredging and filling soil foundation in this embodiment includes the following steps:

[0023] 1) Level the surface of the dredged fill to form a foundation with a slightly higher center and a slightly lower periphery, with a slope of 1% to 2% from the center to the periphery;

[0024] 2) Set up drainage wells, set up drainage wells arranged in a matrix at intervals of 15m on the foundation, and the depth of the drainage wells is 10m;

[0025] 3) Set up the gas injection pipe, such as figure 1 and figure 2 As shown, multiple rings of gas injection pipes around each well 1 are drilled on the foundation, including the first ring of gas injection pipes 2 arranged in a diamond shape, and the second ring of gas injection pipes 3 arranged in a square shape. The third circle of gas injection pipes 4 arranged in a square, the depth of the exhaust port of the first circle o...

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Abstract

The invention discloses a reinforcing dredger fill foundation construction method combining a drainage well and air pressure splitting. The construction method mainly comprises the steps of flattening the surface, arranging the drainage well, arranging an air injection pipe in a drilling mode, arranging a high-pressure air transmission system, splitting through air pressure, pumping water and the like. According to the reinforcing dredger fill foundation construction method combining the drainage well and air pressure splitting, the reinforced depth of dredger fill is large and the reinforcement time is short.

Description

technical field [0001] The invention relates to a foundation treatment method, in particular to a construction method for dredging wells combined with air pressure splitting and strengthening dredging and filling soil foundations. Background technique [0002] Since 1934, it has been nearly 80 years to treat weak foundations with drainage consolidation method. Drainage wells refer to tube wells using concrete pipes or steel pipes, outsourcing filter materials, pumping groundwater to reduce the groundwater level in the dredger fill soil, and the dredge fill soil consolidates and settles when the state of gravity changes. In recent years, it has been widely used in soft soil foundation treatment engineering in the fields of civil engineering and transportation engineering. [0003] Engineering practice shows that although the dredging well technology is an economical and effective treatment method for dredging and reclamation foundation, it has great limitations. The main ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/10
Inventor 季鹏刘松玉章定文
Owner SOUTHEAST UNIV
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