Soft soil foundation reinforcing means

Abstract

A soft soil foundation reinforcing method includes the following steps: backfilling a medium coarse sand cushion on the site surface, inserting and beating a plastic drainage board, setting up drainage systema in vertical and horizontal directions, burying a pore water pressure layered settlement and lateral deformation observation system; laying a vacuum membrane, installing a vacuum sewerage system, vacuum preloading, filling and rolling when the pressure under the vacuum membrane reaches 80KPa and becomes stable; vacuum-heap combined preloading, starting to dynamic compact when an obvious inflexion appears and the settlement curve tends to be gentle inclined and the accumulated settlement volume reaches 60-70% of the estimated settlement volume; when the settlement curve tends to be stable, stopping vacuum preloading and fully compacting. The method has the advantages of short construction period, low cost, large bearing capacity of the hard shell, and obviously reduced post-construction settlement and uneven sensing settlement, and has unique advantages over land reclamation projects in coastal areas such as Fujian, Zhejiang, Shandong and Liaoning Provinces around which a large amount of stonework material can be excavated and backfilled.

Description

technical field [0001] The invention relates to the field of construction engineering foundation reinforcement treatment, in particular to a soft soil foundation reinforcement method. Background technique [0002] Before the construction of the construction project, the foundation must be reinforced as needed to improve the strength, bearing capacity and stability of the foundation soil. At present, the foundation is usually reinforced by the dynamic compaction method, that is, the natural formation or the backfill soil with a small thickness are directly compacted with a heavy hammer. However, if the thickness of the backfill soil or soft soil layer is large, the disadvantages of the traditional dynamic compaction method are obvious, the reinforcement depth is difficult to meet the requirements, the deep compactness and foundation strength are poor, the bearing capacity is poor, and the foundation is prone to settlement. If there is a liquefiable soil layer deep in the fou...

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Problems solved by technology

[0006] The invention provides a soft soil foundation reinforcement method, the main purpose of which is to overcome the shortcomings of the existing soft soil foundation reinforcement methods, such as long construction period and high cost

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