Structure and method for conducting reinforcing processing on soft foundation by combining surcharge preloading and vacuum preloading

A technology of soft foundation reinforcement and heap load preloading, which is applied in infrastructure engineering, soil protection, construction, etc., can solve the problems of limited bearing capacity of draught-filled soil layers, restricted promotion and application, and limited processing depth, etc. The effect of shortening the consolidation cycle, accelerating the consolidation speed, and increasing the depth of treatment

Active Publication Date: 2014-10-29
宁波高新区围海工程技术开发有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the dredger fill soil is generally reinforced during the soft foundation reinforcement treatment. The vacuum combined surcharge preloading method is a commonly used method. However, this method has obvious shortcomings: 1) The consolidation period is long, and the original soft foundation The bearing capacity of the treatment area after consolidation is small; 2) If water is used as the surcharge pressure, the bearing capacity of the dredged fill soil layer after reinforcement treatment is limited (less than or equal to 80kPa), and the treatment depth is limited, so that in a certain This restricts the popularization and application of this method to a certain extent; 3) If mud bags are used as the loading pressure, the mud bags need to be removed after reinforcement treatment, which is inconvenient to use

Method used

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  • Structure and method for conducting reinforcing processing on soft foundation by combining surcharge preloading and vacuum preloading
  • Structure and method for conducting reinforcing processing on soft foundation by combining surcharge preloading and vacuum preloading

Examples

Experimental program
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Embodiment 1

[0030] A kind of surcharge preloading combined with vacuum preloading soft foundation reinforcement treatment structure proposed in this embodiment, such as figure 1 As shown, it includes the first woven cloth 8, the first permeable layer, the first long vertical drainage board 1, the first short vertical drainage board 2, the horizontal filter pipe branch pipe 3, the horizontal filter pipe main pipe 4, the vacuum pump 5, the first Two permeable layers, piled mud layer 6, the second vertical drainage board 7, the second woven cloth 15 and sealing film 16, the first woven cloth 8 is laid on the soil surface of the soft ground treatment area, and the first permeable layer is laid on On the first woven cloth 8, the first long vertical drainage board 1 and the first short vertical drainage board 2 are inserted into the soft ground treatment area through the first permeable layer and the first woven cloth 8, and the first long vertical The tops of the drainage board 1 and the first...

Embodiment 2

[0036] This example proposes a soft foundation reinforcement treatment method with surcharge preloading combined with vacuum preloading corresponding to the structure given in Example 1. The overall realization block diagram is as follows figure 2 As shown, it includes the following steps:

[0037] ①Level the soft foundation treatment area, then lay a layer of first woven cloth on the soil surface of the soft foundation treatment area, and then lay a layer of sand on the first woven cloth to form the first sand cushion, and finally lay the first layer of sand on the first sand A layer of first non-woven geotextile is laid on the cushion layer, and the first permeable layer is composed of the first sand cushion layer and the first non-woven geotextile.

[0038] Here, the purpose of leveling the soft foundation treatment area is to ensure that the self-weight stress of the subsequent dredging mud is vertical to the soil surface in the soft foundation treatment area.

[0039] I...

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Abstract

The invention discloses a structure and method for conducting reinforcing processing on a soft foundation by combining surcharge preloading and vacuum preloading. The structure comprises first woven fabric, a first pervious bed, a second pervious bed, a surcharge slurry layer, second woven fabric and a sealing film which are sequentially arranged on surface soil of a soft foundation processing region, and further comprises first long vertical drain boards, first short vertical drain boards, a horizontal branch filter tube, a horizontal master filter tube, a vacuum pump and second vertical drain boards. The first long vertical drain boards and the first short vertical drain boards are inserted into the soft foundation processing region, the horizontal branch filter tube is placed in the first pervious bed, the horizontal branch filter tube is connected with the vacuum pump through the horizontal master filter tube, and the second vertical drain boards are inserted into the surcharge slurry layer. The structure and method have the advantages that the vertical drain boards in two different lengths are inserted in the soft foundation processing region, the corresponding vertical drain boards are inserted into the surcharge slurry layer, water draining is then conducted on the vacuum condition, therefore, the solidification cycle can be shortened and the bearing capacity of the solidified foundation is high.

Description

technical field [0001] The invention relates to a soft foundation reinforcement treatment method, in particular to a soft foundation reinforcement treatment structure and method with surcharge preloading combined with vacuum preloading. Background technique [0002] At present, there are many technological methods for strengthening and treating the soft foundation to raise the site elevation. The process is generally as follows: firstly, the site is backfilled with dredging fill to the design elevation; then vacuum preloading method or vacuum combined surcharge preloading method is adopted Carry out soft foundation reinforcement treatment. At present, the dredger fill soil is generally reinforced during the soft foundation reinforcement treatment. The vacuum combined surcharge preloading method is a commonly used method. However, this method has obvious shortcomings: 1) The consolidation period is long, and the original soft foundation The bearing capacity of the treatment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/10
Inventor 干焕军余朝伟冯宇
Owner 宁波高新区围海工程技术开发有限公司
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