Foam light soil construction method

Abstract

The invention discloses a foam light soil construction method, comprising: step 1, digging and setting a foundation trench according to a preset elevation, and reinforcing the soft foundation at the bottom of the foundation trench; step 2, setting a plurality of settlements at intervals along the length direction of the roadbed Step 3: There is a subgrade section between two adjacent settlement joints. The subgrade section is poured in sections along the length direction of the subgrade, and each subgrade section is poured layer by layer along the subgrade height direction. The subgrade section includes: subbase, its It is laid on the soft foundation at the bottom of the foundation groove. The subbase includes at least two layers of subbase units. The two sides of the subbase are stepped. The force layer includes a multi-layer load-bearing unit, and the load-bearing unit includes a bearing network and a foam light soil layer; wherein, when the initial setting strength of the foam light soil layer located in the lower layer is greater than 0.3MPa, the foam light weight soil layer in the upper layer is poured soil layer. The invention has the beneficial effect of effectively reducing the post-construction settlement of the roadbed.

Description

technical field [0001] The invention relates to the field of roadbed construction. More specifically, the present invention relates to a foam lightweight soil construction method. Background technique [0002] The soft foundation treatment in the project and the treatment of the ends of buildings such as bridgeheads are a large part of the project cost; the uneconomical, non-environmental and unsafe properties of traditional fillers are becoming increasingly prominent. Foam light soil is a light environmental protection material. Foam light soil is suitable for soft foundation sections of abutment back high embankment, general soft foundation sections, newly reclamation sections, soft foundation sections of underground pipelines, etc. [0003] If the subgrade is built on the soft foundation, if the treatment is not good, it will cause disease. The main factor causing the disease to the project is the excessive settlement deformation. In addition to the consolidation and se...

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Problems solved by technology

[0003] If the subgrade is built on the soft foundation, if the treatment is not good, it will cause disease. The main factor causing the disease to the project is the excessive settlement deformation. In addition to the consolidation and settlement of the natural foundation soil, the long-term excessive additional load other than its own weight will also cause excessive settlement and deformation, and post-construction settlement will also occur. Uniform settlement, which increases the maintenance cost during roadbed operation, affects the smoothness of the road, and even threatens the safety of vehicle operation

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