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

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...

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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

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