Double-layer vacuum preloading consolidated soft soil foundation structure

Abstract

The invention discloses a double-layer vacuum preloading consolidated soft soil foundation structure, and belongs to the technical field of sludge treatment. The double-layer vacuum preloading consolidated soft soil foundation structure comprises a storage yard for stacking sludge, a cofferdam is arranged on the storage yard, a bottom drainage pipe network system is arranged on the storage yard inthe cofferdam, a lower filter layer is covered on the bottom drainage pipe network system, a sludge layer is stacked on the lower filter layer, a plurality of filter plates are inserted into the sludge layer and penetrate through the lower filter layer to be in communication with a bottom drainage pipe network system, the bottom drainage pipe network system is in communication with a lower vacuumpump, the lower vacuum pump is located outside the cofferdam, and an upper sealing film is laid on the sludge layer. According to the supercharged double-layer vacuum preloading consolidated soft soil foundation structure, the drainage consolidation effect of treated sludge is better.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a double-layer vacuum preloading reinforcement soft soil foundation structure. Background technique [0002] The vacuum preloading method is to insert a vertical drainage channel (such as sand well, bagged sand well or plastic drainage board, etc.) into the soft foundation that needs to be reinforced, then lay a layer of sand cushion on the ground, and then cover it with a layer Airtight membrane. Use a vacuum pump or other vacuum means to evacuate under the membrane to form a negative pressure (relative to atmospheric pressure), and the negative pressure is transmitted downward along the vertical drainage channel. The unequal pressure state between the soil and the vertical drainage channel makes the negative pressure move toward the soil. Under the action of negative pressure, the pore water gradually seeps into the vertical drainage channel to achieve the effect of s...

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned vacuum preloading structure for soft foundation reinforcement uses a vacuum pump to pump water up to drain the silt. In this way, when the instrument detects that the silt is qualified, the vacuum pump stops, and part of the pore water in the vacuum main pipe will flow back again. In the sludge, since there are many buried vacuum main pipes, some of the water in each vacuum main pipe will flow back into the sludge, which will cause the sludge to become dry on the top and wet on the bottom, resulting in unsatisfactory drainage and consolidation of the sludge.

Images