Soft soil foundation drainage and solidification treatment method

Abstract

The invention relates to a soft soil foundation drainage and solidification treatment method. In the method, the middle of a rigid frame is vertically connected with a hollow pipe, a water absorption hole is formed at the bottom of the hollow pipe, a plurality of groups of keel pieces are uniformly distributed in the middle of the rigid frame, and the rigid frame, the hollow pipe and the keel pieces are packed together through a permeable membrane; the rigid frame is pressed in a foundation, the hollow pipe is provided with a vacuum pump, the periphery of the permeable membrane is blocked by fine particles and an impermeable layer is formed, a vibrator is started, vibration force is dispersed and transmitted to the periphery of the rigid frame through the keel pieces, the fine particles at the periphery of the permeable membrane are vibrated and damaged, and water is continuously drained to the foundation for solidification through a drainage pipe. The defect that the water cannot be drained due to the impermeable layer is overcome. The problem of the impermeable layer formed due to blockage of the fine particles at the periphery of the permeable membrane in the foundation is radically solved, and the water is continuously absorbed; therefore, the construction period is greatly shortened, the rigid frame can be repeatedly used, the cost is saved, and the pollution is reduced.

Description

Technical field [0001] The invention relates to a soft soil foundation treatment method, in particular to a soft soil foundation drainage consolidation treatment method. Background technique [0002] In the construction of foundation engineering, drainage consolidation is a conventional method for soft soil foundation treatment. As the name implies, drainage consolidation is to try to drain the water of the foundation soil to enhance the bearing capacity of the foundation soil. Now there is a demand for land from the sea, the so-called reclaiming land from the sea, and the soft soil formed by reclaiming land from the sea has very high water content, extremely low strength, and more difficult drainage. [0003] Prior to the present invention, stack preloading and vacuum preloading were usually used for drainage. In both cases, a lot of plastic drainage boards are vertically driven into the foundation with high water content. The so-called plastic drainage board is a plastic sheet...

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Problems solved by technology

[0004] However, plastic drainage boards are relatively soft and have a small surface area. They are not suitable for land reclamation projects, and the effect is greatly reduced. Moreover, plastic drainage boards cannot be removed from the foundation after use, and they will slowly decompose in the foundation for a long time, which will damage the soil and groundwater pollution

The most serious problem is that when the plastic drainage board was first used, the effect was obvious, but over time, the permeable membrane wrapped around the plastic drainage board was blocked by fine particles in the foundation, forming an impermeable layer, which made water absorption very slow, even almost non-absorbent

This kind of situation is very fatal for the construction of foundation projects that pay attention to the construction period, because it will lead to an indefinite delay in the construction period. If it is reclamation, the time will be too long, and the water will not be discharged in one year or even two years. Engineering equipment cannot enter the site for construction

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