Composite reinforced loess foundation and construction method thereof

A technology of composite geomembrane and loess, which is used in infrastructure engineering, soil protection, construction, etc., can solve problems such as loess foundation vibration and sink, and achieve the effects of controlling foundation deformation, improving water sensitivity, and enhancing foundation bearing capacity.

Inactive Publication Date: 2017-01-11
NORTHWEST UNIV(CN)
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  • Abstract
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Problems solved by technology

[0006] The invention provides a composite reinforced loess foundation and its construction method, which are used to solve ...

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  • Composite reinforced loess foundation and construction method thereof

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Embodiment 1

[0040] Embodiment 1 of the present invention provides a composite reinforced loess foundation. The foundation is composed of lime-soil cushion layer 1, composite reinforced loess replacement soil layer 2, composite geomembrane 3 and lime-soil backfill soil layer 4 from bottom to top. The loess replacement soil layer 2 is evenly mixed with glass fiber 5, and the composite reinforced loess replacement soil layer 2 is evenly laid with three layers of bidirectional geogrids 6 along the horizontal direction. Specifically, the bidirectional geogrids 6 laid are made of steel Plastic geogrid, steel wire is installed inside the steel-plastic geogrid, and the mass per unit area of ​​bidirectional geogrid 6 is 520g / m 2 , the side length of the transverse mesh is 40mm, the side length of the longitudinal mesh is 40mm, the longitudinal tensile strength is 26.09KN / m, the transverse tensile strength is 25.91KN / m, the longitudinal elongation is 12.3%, and the transverse elongation is 12.8% . ...

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Abstract

The invention discloses a composite reinforced loess foundation and a construction method thereof, and relates to the technical field of foundation treatment. By the adoption of the composite reinforced loess foundation and the construction method thereof, the problem that in the prior art, dynamic settlement of a loess foundation is caused by loess collapse and vibration of locomotives is solved. The composite reinforced loess foundation is sequentially composed of a lime soil under layer, a composite reinforced loess replacing and filling layer, a composite geo-membrane and a lime soil backfilling layer from bottom to top. Glass fibers are evenly mixed into the composite reinforced loess replacing and filling layer, and a plurality of layers of bidirectional geogrids are evenly laid in the composite reinforced loess replacing and filling layer in the horizontal direction. According to the composite reinforced loess foundation and the construction method thereof, the glass fibers and the bidirectional geogrids are combined to serve as reinforcing materials of the composite reinforced loess replacing and filling layer so that the overall compressive strength, tensile strength and shearing strength of the foundation can be improved, loess collapse is eliminated to the maximum extent, and the shock resistance of the foundation is enhanced to the maximum extent.

Description

technical field [0001] The invention relates to the technical field of foundation treatment, in particular to a composite reinforced loess foundation and a construction method thereof. Background technique [0002] The loess distribution area in my country is 6.4×105km2, mainly distributed in the Northwest and North China regions. The loess has accumulated Q4 Holocene loess, Q3 Malan loess, and Q2 Lishi loess successively from top to bottom. Among them, the recently accumulated Q4 Holocene loess Distributed in the surface zone of the Northwest Loess Plateau, its physical and mechanical properties are complex, in an unstable and under-consolidated state, and it has strong collapsibility and vibration subsidence; Q3 Malan loess has large pores, vertical joints, loose structure, and Collapsibility or strong collapsibility; Q3 Lishi loess soil layer is dense, with large bearing capacity, no collapsibility or slight collapsibility. Therefore, in areas where loess is widely distrib...

Claims

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Application Information

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IPC IPC(8): E02D3/00
CPCE02D3/00E02D3/005E02D2300/0053E02D2300/0084
Inventor 谢婉丽郭倩怡刘颖莹赵东安王勇
Owner NORTHWEST UNIV(CN)
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