Soft foundation reinforcement treatment method of vacuum preloading combined with dredging and filling mud

Abstract

The invention discloses a soft foundation reinforcement treatment method of vacuum preloading combined with dredging and filling mud. First, a first woven cloth and a first permeable layer are laid on the soil surface layer of the soft foundation treatment area; and then inserted into the soft foundation treatment area. Set up the first long vertical drainage board and the first short vertical drainage board, connect the horizontal filter pipe, and connect the vacuum pump; then lay the second permeable layer on the first permeable layer, according to the design elevation of the soft ground treatment area in the second The dredging and filling mud layer is formed on the permeable layer to the design elevation; then the second vertical drainage board is inserted into the dredging and filling mud layer; the second woven cloth and sealing film are laid in sequence on the dredging and filling mud layer; finally The vacuum preloading treatment area is vacuumed, and after the vacuuming is completed, the layered sludge solidification is carried out on the drained dredging mud layer; the advantage is that the consolidation period is short, and the bearing capacity of the treated dredged mud layer is high, which is convenient for construction The equipment works on it, and the treated foundation has a high bearing capacity and a high treatment depth.

Description

technical field [0001] The invention relates to a soft foundation reinforcement treatment method, in particular to a soft foundation reinforcement treatment method combined with vacuum preloading and dredging mud. Background technique [0002] At present, there are many technological methods for strengthening and treating soft ground to raise the site elevation. The process is generally as follows: firstly, the site is backfilled with dredging fill to the design elevation; Soft foundation reinforcement treatment. However, due to the high water content, low shear strength, and flow-plastic state of the dredged fill soil, it needs to be reinforced. The traditional method is to achieve it through preliminary drainage and laying bamboo rafts. However, after this The dredger fill soil layer treated by conventional technology has low consolidation degree, low bearing capacity, hard top and bottom soft layer, and limited depth of hard layer, which ultimately makes it difficult for...

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Problems solved by technology

However, due to the high water content, low shear strength, and flow-plastic state of the dredged fill soil, it needs to be reinforced. The traditional method is to achieve it through preliminary drainage and laying bamboo rafts. However, after this The dredger fill soil layer treated by conventional technology has low consolidation degree, low bearing capacity, hard top and bottom soft layer, and limited depth of hard layer, which ultimately makes it difficult for construction equipment to carry out construction work above the dredger fill soil layer; In the process of soft foundation reinforcement treatment, dredger fill soil is reinforced at the same time. The vacuum combined surcharge preloading method is a commonly used method. However, this method has obvious shortcomings: 1) If water is used as surcharge pressure, the reinforcement treatment The limited bearing capacity (less than or equal to 80kPa) of the dredged fill soil layer and the limited depth of treatment restrict the promotion and application of this method to a certain extent; It is inconvenient to use after the reinforcement treatment needs to be removed from the mud bag

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