A method and device for rapid consolidation of soft soil with vertically layered pumping

Abstract

The invention discloses a method and a device for rapidly consolidating soft soil by vertical layer-by-layer water pumping. The device is characterized by comprising a magnetron, vertical drainage steel tubes, water pumping devices, horizontal PVC (polyvinyl chloride) tubes and a vacuum pump; the magnetron is arranged in a soft soil foundation, and is capable of generating a microwave to heat a soil mass; the vertical drainage steel tubes are arranged in the soft soil foundation; a certain number of holes are formed in the surface of each steel tube so as to drain off water; each water pumping device comprises a sliding piston, a check valve, a water pumping tube and a drainage tube; each drainage tube penetrates the tail part of the corresponding vertical drainage steel tube and is connected with the corresponding PVC tube; and the vacuum pump is connected with the other ends of the horizontal PVC tubes. According to the method and the device disclosed by the invention, drainage consolidation can be rapidly performed on the soft soil foundation by pumping water by layers from top to bottom by comprehensively utilizing a microwave heating technique and a vacuum preloading technique, and therefore a goal of soil mass consolidation is achieved; the method and the device disclosed by the invention have high engineering application value.

Description

Technical field: [0001] The invention relates to a soft soil reinforcement technology, in particular to a method and device for rapid consolidation of soft soil by vertically layered pumping. Background technique: [0002] With the rapid development of the economy, it has become a common engineering practice to construct large-scale construction projects in the southeast coastal areas. Since the southeast coastal areas are mostly soft soil areas, soft soil has a large void ratio, high water content, poor strength and stability, and it is difficult to meet engineering requirements. Reinforcement of soft soil areas is a necessary condition for building construction in soft soil areas. Common soft soil reinforcement methods include surcharge preloading method, vacuum preloading method and vacuum-surcharge combined preloading method. If the water content of the soft soil is extremely high (greater than 100%), the above three reinforcement methods are difficult to implement. ...

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Problems solved by technology

If the water content of the soft soil is extremely high (greater than 100%), the above three reinforcement methods are difficult to implement

[0003] When the vacuum preloading method is used for reinforcement, there are two defects as follows: 1. The traditional plastic drainage board is easily deformed under the action of earth pressure, thus blocking the drainage 2. If the vacuum treatment is carried out within the entire depth range of the soil, it is difficult to achieve the expected purpose due to the long pumping section, and it will cause a waste of energy

[0004]During the consolidation process, due to the fine particles of the soft soil, the permeability coefficient of the soft soil is relatively small, which makes the drainage and consolidation of the soft soil take a long time, which will have a negative impact on the construction progress. great influence

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