Sludge curing device and method combining vacuum grouting and resistance heating

Abstract

The invention discloses a sludge curing device combining vacuum grouting and resistance heating. The sludge curing device comprises a plurality of grouting pipes, water draining plates, a horizontal water draining pipe, resistance wires, a horizontal grout conveying guide pipe, a grout conveying hose, a grout conveying pump and a curing agent grout storage tank. A plurality of grout outlets are formed in each grouting pipe. The multiple grouting pipes communicate with the horizontal grout conveying guide pipe. One water draining plate is arranged between every two adjacent grouting pipes. Themultiple water draining plates communicate with the horizontal water draining pipe. The horizontal water draining pipe communicates with an external water draining pipe. The resistance wires are woundon the water draining plates and electrically connected with a power source arranged in an external power source control box. The horizontal grout conveying guide pipe sequentially communicates withthe grout conveying pump and the curing agent grout storage tank through the grout conveying hose. The invention also discloses a sludge curing method adopting the sludge curing device. The sludge curing method is suitable for shoal sludge for reclaiming land from the sea by building dykes, a shallow soft soil foundation or a deep soft soil foundation, improves the curing degree of the sludge, shortens the curing time and enables the cured sludge to have certain bearing capacity.

Description

technical field [0001] The invention relates to a device and method for consolidation treatment of soft silt foundation, in particular to a device and method for solidifying silt by vacuum grouting combined with resistance heating, and belongs to the technical field of soft foundation treatment. Background technique [0002] Soft foundations such as tidal silt and dredging silt in coastal areas have the characteristics of high water content, low shear strength, high compressibility, bearing capacity and long consolidation time, so the foundation settlement is large, and most of them are uneven settlement, which is easy to The wall of the upper building or structure is cracked and overturned. For the soft mud foundation, the usual method is to use the vacuum preloading method and the grouting method. The vacuum preloading method takes 3 months to consolidate, and the consolidation degree is about 80. %, the bearing capacity of the treated silt soil soft foundation is about 80...

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Problems solved by technology

[0002] Soft foundations such as tidal silt and dredging silt in coastal areas have the characteristics of high water content, low shear strength, high compressibility, bearing capacity and long consolidation time, so the foundation settlement is large, and most of them are uneven settlement, which is easy to The wall of the upper building or structure is cracked and overturned. For the soft mud foundation, the usual method is to use the vacuum preloading method and the grouting method. The vacuum preloading method takes 3 months to consolidate, and the consolidation degree is about 80. %, the bearing capacity of the treated silt soil soft foundation is about 80kPa; although the grouting method can theoretically increase the integrity of the land and improve the strength of the soil, but because the silt soil has poor permeability and high cohesion, the soil porosity is relatively large. Practice shows that the grout poured into the soil is easy to generate a seepage channel along the weak soil layer of the silt soil, and penetrates the entire soil, eventually causing most of the slurry to overflow along the channel , so that the effect of reinforcement cannot be achieved, so it is urgent to find a suitable method to solve the problems of low vacuum preloading consolidation degree, long consolidation time, grouting leakage and grouting

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