A kind of straw fiber silk reinforced cement improving loose fill foundation and its construction method

Abstract

The invention relates to a straw fiber yarn reinforced cement modified loose filling soil foundation and a construction method thereof. The foundation specifically comprises the following components in percentage by weight based on dry soil: 0.5-1.5 percent of straw fiber yarns, 5-8 percent of cement and 90.5-94 percent of loose filling soil, wherein the straw fiber yarns are 10-15 millimeters in length. The foundation construction method is implemented through a stirring machine mixing process and a field mixing process according to the construction engineering scale, and the foundation is formed by means of mixing, piling and grinding. The foundation disclosed by the invention has the advantages of pressure resistance, shearing resistance, crack resistance, high toughness, high water stability, low swell-shrink characteristic and the like, is low in cost, is easy and reliable for construction, and can be widely applied to the engineering fields of side slopes, roadbeds, foundations, embankments and the like.

Description

technical field [0001] The invention belongs to the technical field of foundation and its construction engineering, and in particular relates to an improved loose-filled soil foundation with straw fiber silk reinforced cement and a construction method thereof. Background technique [0002] At present, the foundation construction methods can be roughly divided into two categories: stabilization methods and reinforcement methods. Stabilization methods mainly include cement improvement, lime improvement, fly ash improvement or polymer reagent improvement methods, etc.; reinforcement methods mainly include geotextiles, geomembranes, geogrids, continuous fiber reinforced soil methods, etc. [0003] As a cheap and efficient stabilizer, cement has played a great role in improving soil properties. The addition of cement can greatly improve the compression resistance, shear resistance and frost resistance of engineering soil, and reduce its expansion and contraction and plasticity i...

AI Technical Summary

Problems solved by technology

Although fiber soil has many advantages, it still has some shortcomings: the first is that the reinforcing effect of fiber is not very prominent, and the strength of reinforced soil is not much improved, which is far less than the strength of cement or cement-stabilized soil; The water temperature of the soil is poor, and it will disintegrate after soaking in water for a period of time. Most of the fibers have a smooth surface and are difficult to couple and bond with the engineering soil; third, once the engineering soil is discarded, the polyester fiber is difficult to separate from the soil, and the discarded soil will be harmful to the soil. The environment causes secondary pollution

This method of reinforcing cohesive soil with straw fiber has been used from ancient times to the present, but there is no quantitative analysis, and the ratio of straw fiber to soil is unknown, so technological innovation of traditional folk heritage is imperative

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