Foam light soil construction method

Abstract

The invention discloses a foam light soil construction method, which comprises the following steps: 1, a foundation trench is digged according to a preset elevation, and a soft foundation is reinforced at the bottom of the foundation trench; 2, a plurality of settlement joints in the length direction of the roadbed at intervals are arranged; 3, a subgrade section is arranged between every two adjacent settlement joints, subgrade sections are constructed and poured in a segmented mode in the length direction of the subgrade, each subgrade section is poured in a layered mode in the height direction of the subgrade, wherein each subgrade section comprises: a subbase layer laid on the soft foundation at the bottom of the foundation trench, each subbase layer comprises at least two layers of subbase units, and the two sides of each subbase layer are step-shaped, each bottom base unit comprises an anti-sinking structure, a connecting ball body, a limiting net and a foam light soil layer; a force bearing layer comprises multiple layers of force bearing units, and each force bearing unit comprises a bearing net and a foam light soil layer; and when the initial setting strength of the foamed light soil layer located on the lower layer is larger than 0.3 MPa, the foamed light soil layer located on the upper layer is poured. The method has the beneficial effect of effectively reducing thepost-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 construction method of foamed lightweight soil. Background technique [0002] The treatment of soft foundations, bridgeheads and other building end treatments in the project is a large part of the project cost; the uneconomical, environmentally unsafe and unsafe features of traditional fillers have become increasingly prominent. Foam light soil is a kind of light and environmentally friendly material. Foam light soil is suitable for soft foundation sections of high embankment behind abutments, general soft foundation sections, newly reclaimed sections, and soft foundation sections of underground pipelines. [0003] If the roadbed is built on the soft foundation, disease will occur once it is not properly handled. The main factor causing the project disease is the excessive settlement and deformation. When the roadbed is filled with conventional f...

AI Technical Summary

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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