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Novel vacuum preloading system and treatment method for soft soil foundation treatment

A soft soil foundation and vacuum pumping system technology, applied in soil protection, infrastructure engineering, construction, etc., can solve the problems of poor treatment of deep soft soil layers, etc., and achieve the goal of improving drainage efficiency, low cost, and increasing efficiency Effect

Pending Publication Date: 2017-05-31
SHANDONG ZHENGYUAN CONSTR ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the above-mentioned problem that the treatment effect of the deep soft soil layer is not good by using the binding method, the patent of the present invention provides a new vacuum preloading system and treatment method for soft soil foundation treatment, which increases the drainage board The vacuum degree in the second half improves the drainage efficiency of the drainage board in the formation, increases the effective depth of the vacuum preloading foundation treatment method, reduces the loss of vacuum degree along the way, and greatly increases the efficiency of vacuum preloading

Method used

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  • Novel vacuum preloading system and treatment method for soft soil foundation treatment
  • Novel vacuum preloading system and treatment method for soft soil foundation treatment
  • Novel vacuum preloading system and treatment method for soft soil foundation treatment

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Embodiment 1

[0036] The present invention is a new type of vacuum preloading system for soft soil foundation treatment. The specific implementation of the present invention will be further described in conjunction with the accompanying drawings and specific application examples.

[0037] A new type of vacuum preloading system for soft ground treatment, including a vacuum system and a sealing system, the vacuum system includes a vertical vacuum device and a horizontal vacuum device, and the vertical shaft vacuum device includes a conversion Joint 1, drainage plate 3 and vertical vacuum tube 2, the conversion joint 1 is a hollow cavity with upper and lower openings, the middle part of the cavity is connected to the external connection pipe 12 of the conversion joint, and the external connection pipe 12 of the conversion joint extends upward , the length of the upward extension part of the conversion joint external pipe 12 on the conversion joint 1 is not less than 5 cm, the conversion joint e...

Embodiment 2

[0043] A soft soil foundation treatment project, the thickness of the surface plain fill is between 4.0-5.5m, the underlying soft soil layer is a silt layer, the thickness of the silty clay layer is about 15m, and the groundwater level is about 1.5m. The new vacuum preloading system is applied The foundation treatment of vacuum preloading in this field, the specific construction process is as follows:

[0044] The length of the drainage board 3 and the respective lengths of the lateral evacuation pipes 2 are determined according to the site formation and groundwater conditions, combined with the foundation strength and deformation requirements required by the design. Level the site, remove debris, measure the initial ground elevation, and first lay a layer of woven fabric and a layer of non-woven geotextile on the ground surface. The use of straight-type horizontal drainage and vacuuming channels can eliminate the sand cushion in the traditional vacuum preloading system. In or...

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Abstract

The invention discloses a novel vacuum preloading system and a treatment method for soft soil foundation treatment. The novel vacuum preloading system comprises a vacuum-pumping system comprising a vertical vacuum-pumping device and a transverse vacuum-pumping device. The vertical vacuum-pumping device comprises conversion joints, drainage plates and vacuum-pumping pipes. Conversion joints outer connecting pipes extend upward, and the drainage plates penetrate through the conversion joints. The transverse vacuum-pumping device comprises a main pipe, filter pipes, hand-type joints, four-way connectors and steel wire hoses. The upper ends of the drainage plates are connected with the lower ends of the drainage plate hand-type joints. Hand-type joints outer connecting pipes are connected with the filter pipes. The four-pass connectors are connected with the hand-type joints outer connecting pipes and the steel wire hoses correspondingly. The other ends of the steel wire hoses are connected with the lateral vacuum-pumping pipes, and the other ends of the lateral vacuum-pumping pipes are connected with the conversion joints outer connecting pipes. The two ends of the main pipe are connected with the filter pipes and a vacuum pump correspondingly. The linear loss of the vacuum degree is reduced, the efficiency of vacuum preloading is greatly increased, and the novel vacuum preloading system is easy and convenient to construct, low in cost, short in construction period, and suitable for the wide-range use.

Description

technical field [0001] The invention relates to the technical field of soft soil foundation treatment, in particular to a novel vacuum preloading system and treatment method for soft soil foundation treatment, especially suitable for foundation treatment of deep soft clay, dredging fill or muddy soil. Background technique [0002] The vacuum preloading method is to first lay a sand cushion on the surface of the soft ground that needs to be reinforced, then bury a vertical drainage pipe, and then use an airtight sealing film to isolate it from the atmosphere. Or other means to evacuate to form a negative pressure under the membrane and increase the effective stress of the foundation. To achieve good results by using vacuum preloading to strengthen the soft foundation, the first is to increase the "preload" as much as possible, that is, to increase the vacuum degree under the membrane, and the second is to improve the deep reinforcement effect of the soil layer, that is, to re...

Claims

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Application Information

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IPC IPC(8): E02D3/00E02D3/10
CPCE02D3/00E02D3/10
Inventor 郁章剑董斌陆秋生江海彭国斌施振跃王振王连斌张文俊赵松壮王倩刘燕韩刚
Owner SHANDONG ZHENGYUAN CONSTR ENG
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