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Intermittent vacuum precompression device and soft foundation treatment method of intermittent vacuum precompression device

A technology of vacuum preloading method and soft foundation treatment, applied in vacuum preloading device and its soft foundation treatment, ultra-soft soil drainage and other similar engineering fields, can solve the problem of affecting the yard filling process and the effect is not obvious, etc. problems, to avoid rapid aggregation, reduce migration speed, and delay clogging time.

Active Publication Date: 2015-03-25
NANJING HYDRAULIC RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former mainly treats mud, and drainage pipe network needs to be erected in advance to separate the mud quickly from water and soil, which affects the filling process in the storage yard; the latter realizes the increase of negative pressure through the direct discharge channel structure and booster pipe, but After the low-permeability mud layer is formed, the effect is not obvious under the action of high negative pressure

Method used

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  • Intermittent vacuum precompression device and soft foundation treatment method of intermittent vacuum precompression device
  • Intermittent vacuum precompression device and soft foundation treatment method of intermittent vacuum precompression device
  • Intermittent vacuum precompression device and soft foundation treatment method of intermittent vacuum precompression device

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Embodiment 1

[0031] Such as figure 1 As shown, an intermittent vacuum preloading device, which includes a vertical drain body (1), a straight connector (2) connected to the vertical drain body (1), and a connecting pipe connected to the straight connector (2) (3), the drainage branch pipe (4) connected to the connecting pipe (3), the drainage main pipe (5) connected to the drainage branch pipe (4), the jet pump (6) connected to the drainage main pipe (5), the drainage A valve (7) is installed between the main pipe (5) and the jet pump (6).

[0032] For the intermittent vacuum preloading device described above, 300g / m 2 geotextile (8) and double-layer sealing membrane (9).

[0033] The above-mentioned intermittent vacuum preloading device is characterized in that: the valve (7) is a waterproof high-frequency electric valve or a pneumatic valve. The valve control frequency is 5 seconds to 60 seconds, and the change form is the sinusoidal change or pulse change of the vacuum de...

Embodiment 2

[0037]The intermittent vacuum preloading method provided by the invention carries out the method for soft ground treatment, and it comprises the following steps:

[0038] a. Drainage channel connection: According to the design requirements, bury the vertical drainage body (1), then connect the straight joint (2) with the vertical drainage body (1), and then connect the connecting pipe (3) with the straight joint (2) ), and connect the drainage branch pipe (4) to the connecting pipe (3), then connect the drainage main pipe (5) to the drainage branch pipe (4), and then connect the jet pump (6) to one end of the drainage main pipe (5), And install a valve (7) on the pipeline between the drain main (5) and the jet pump (6);

[0039] b. Vacuum preloading and sealing treatment: Lay 300g / m on the horizontal pipes of the drainage branch pipe (4) and the drainage main pipe (5) in sequence 2 The geotextile (8) and the double-layer sealing film (9) are pressed into the adjacent ...

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Abstract

The invention discloses an intermittent vacuum precompression device and a soft foundation treatment method of the device. The intermittent vacuum precompression device comprises vertical drainage bodies (1), direct connecting joints (2) connected with the vertical drainage body (1), connecting pipes (3) connected with the direct connecting joints (2), discharge branches (4) connected with the connecting pipe (3), a drainage collector (5) connected with the discharge branches (4), a jet pump (6) connected with the drainage collector (5), and a valve (7) mounted between the drainage collector (5) and the jet pump (6). The device can delay aggregation of clay fine particles during drainage via short-period variation of a vacuum degree in an early drainage stage, alleviate clogging of the drainage bodies due to clay particle migration under the condition of applying a constant vacuum degree and therefore delay the clogging of a drainage pipeline and a neighbouring soil body. The device can solve the problem of too early clogging of a drainage channel due to soil material migration in the existing vacuum precompression process, and has an important application value.

Description

technical field [0001] The present invention designs a vacuum preloading device for reinforcing soft soil, and in particular relates to a vacuum preloading device whose vacuum degree changes automatically with time and a method for treating soft ground, which is suitable for drainage of super soft soil prone to clogging and other similar projects. Background technique [0002] With the development of tidal flat reclamation and construction in China, especially after my country’s “Twelfth Five-Year Plan” proposed to promote the development of marine economy, the requirements for the area of ​​the land area near the sea and the speed of development will inevitably increase, and land reclamation is one of the main measures. . Most of the reclamation soil used for tidal flat reclamation has the characteristics of high water content, low strength and poor permeability, so it is necessary to make corresponding foundation treatment when carrying out infrastructure construct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/10
CPCE02D3/10
Inventor 徐锴陈庚林生法范明桥李秉宜彭中浩耿之周魏雁冰
Owner NANJING HYDRAULIC RES INST
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