Biological cement reinforced roadbed on under-consolidation silt blowing foundation and construction method of roadbed

Abstract

The invention belongs to the field of soft soil foundation treatment, and relates to a biological cement reinforced roadbed on an under-consolidation silt blowing foundation and a construction method.Grille gravel piles in the roadbed penetrate through the under-consolidation silt blowing foundation and are embedded into a lower horizontal bearing layer. A plastic drainage plate is driven into the under-consolidation silt blowing foundation. A biological cement-grille reinforced cushion layer is flatly paved on the upper surface of the grille gravel piles. Non-woven geotextiles are laid on the upper surface and the lower surface of the biological cement-grille reinforced cushion layer. The non-woven geotextiles and a sealing film are sealed at the bottom of a tamped clay sealing ditch. Roadbed filling soil is packed on the upper surface of the biological cement-grille reinforced cushion layer and on the non-woven geotextile. Biological waterproof layers are arranged on the upper surface and the side surface of the roadbed filling soil. A soil layer is arranged on the biological waterproof layer on the roadbed side face, and slope protection vegetation is planted to form a roadbedslope ecological waterproof protection layer. The roadbed has the advantages of being reasonable in structure, high in bearing capacity, short in construction period, environmentally friendly and thelike, and is a green ecological structure worthy of popularization.

Description

technical field [0001] The invention belongs to the technical field of foundation treatment, and relates to a roadbed structure, in particular to a biological cement reinforced roadbed on an under-consolidated silt blowing foundation based on microbial solidification technology and a construction method thereof. Background technique [0002] At present, due to the increasing demand for land resources, in order to solve the problem of "more people and less land", many coastal cities have adopted large-scale tidal flat filling to vigorously develop coastal land resources. As an economical and efficient The filling method has been widely used. However, limited by the source of sand and gravel materials in coastal areas, dredged silt is mostly used for land reclamation, which leads to the generation of under-consolidated dredged foundations with ultra-high moisture content and poor seepage consolidation. How to improve the consolidation of the underconsolidated dredging foundat...

AI Technical Summary

Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a bio-cement reinforced subgrade on an under-consolidated dredging foundation and a construction method thereof. The purpose is to reinforce the under-consolidated dredged foundation with biocement, Combined with the improvement of the drainage system, the consolidation drainage capacity is improved, thereby reducing the moisture content and shortening the construction period, thereby solving the technical problems of insufficient consolidation, bearing capacity and stability of the existing technology

Images