Drain plate device and method with water absorption expanding material under pile-loading and prepressing

Abstract

The invention discloses a drain plate device and a method with water absorption expanding material under pile-loading and prepressing. The device includes multiple water absorption expanding drain plates, and the water absorption expanding drain plates in a row shape are arranged in soft soil foundation at intervals, prepressing soil is pile-loaded on the ground surface of the soft soil foundation, and the ground surface of the soft soil foundation is clamped between the two adjacent water absorption expanding drain plates. The water absorption expanding drain plates are composed of drain plates, the water absorption expanding materials and fabric layers. The water absorption expanding materials are wrapped in the fabric layers, and two sides are correspondingly clamped by the drain platesto form a sandwich structure. Holes are formed in the drain plates, the drain plates on two sides of the water absorption expanding materials are not fixed in the horizontal direction, and has the degree of freedom moving outwards in the horizontal direction when the water absorption expanding materials expand. When the soft soil foundation is treated, the pore water in soil body enters the waterabsorption materials through the drain plates, the water absorption materials expand after absorbing water, and squeeze the drain plates to both sides to produce the squeezing effect on the surrounding soil body. After the soft soil foundation drainage is completed, the water absorption materials can remain in the foundation soil.

Description

technical field [0001] The invention belongs to the field of soft soil foundation treatment, and in particular relates to a device and method for a drainage board with water-absorbing swelling material inside under preloading and preloading. Background technique [0002] The surcharge preload method is often used for soft soil foundation treatment, especially in coastal and dredging reclamation areas, and when the surcharge preload method is used for foundation treatment, plastic drainage boards are often used as drainage channels. [0003] During surcharge preloading, the upper part of the soil is loaded with additional stress on the soil, and excess pore water pressure is generated in the lower part of the soil. The pore water in the soil enters the plastic drainage board and is discharged through the drainage channels in the drainage board. surface. The foundation is consolidated during the drainage process, and the strength of the soil gradually increases to achieve the...

AI Technical Summary

Problems solved by technology

This method is not effective for drainage reinforcement of deep soil

[0007] 3. It takes a long time to treat the soft soil foundation with the surcharge preloading method, which is very unfavorable to the efficiency of engineering construction. Therefore, it is particularly important to speed up this drainage process

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