Local prestressed integrated controllable degradation drainage board

Abstract

The invention relates to a technology for treating soft soil foundations through vacuum preloading, in particular to a partial prestress integral type controlled degradation drain board used for relieving post-construction settlement of vacuum preloading of a soft foundation. The partial prestress integral type controlled degradation drain board is composed of a plastic core board and a filtering film, wherein a partial section of the filtering film can be degraded. Most of the filtering film and the core board are made of existing mainstream drain board materials, and the normal work of the drain board is not affected. The partial section of the filtering film is made of degradable fiber materials. The degrading rate of the partial section of the filtering film is controlled by controlling the mixing ratio of raw materials, so that requirements in different construction periods are met. Circumferential prestress is applied to the degradable partial section of the filtering film, and the filtering film and the core board form an integral type structure through the thermal bonding technology, so that deformation of degradable fibers is reduced, and the normal drain efficiency during soft foundation treatment is guaranteed. After the construction period is ended, the degradable partial section of the filtering film is degraded, and a water-tight structure is formed by stuffing soft soil onto the plastic drain board core board. In this way, post-construction settlement of vacuum preloading of the soft foundation is substantially reduced.

Description

technical field

[0001] The invention relates to a technique for treating soft soil foundations with vacuum preloading, in particular to a segmental prestressed integrated controllable degradable drainage board, which is used to improve post-construction settlement of soft foundations under vacuum preloading. Background technique

[0002] In the construction of ports, traffic roads, land reclamation and other projects on soft soil foundations, the drainage treatment of soft soil foundations is a technical difficulty that must be faced in foundation improvement. When using the vacuum preloading method to treat soft ground, plastic drainage boards are widely used for drainage; the mainstream plastic drainage boards are composed of plastic core boards and filter membranes wrapped around the plastic core boards, and the core boards and filter membranes are separate combinations. . The inserting machine inserts the plastic drainage board into the soft soil foundation; the plastic...

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