Anti-frost heaving structure of transition section of bridge and culvert structures in cold regions

Abstract

The invention relates to a bridge and culvert structure transition section anti-frost-heaving structure in a cold region. The portion between the connecting portions of a side wall of a transverse building and a roadbed is filled with an anti-frost structural layer in a built manner. The longitudinal profile of the anti-frost structural layer is almost in a right trapezoid shape with the upper portion narrower than the lower portion. The longitudinal right-angle side of the trapezoid of the anti-frost structural layer faces the side wall of the transverse building. The longitudinal profile of the anti-frost structural layer is designed in the trapezoid with the upper portion narrower than the lower portion, the anti-frost-heaving effect can be guaranteed, meanwhile, materials are saved to the maximum extent, and the structure is low in construction cost, scientific and reasonable.

Description

technical field [0001] The invention relates to an anti-frost heaving structure for the transition section of bridge and culvert structures in cold regions. Background technique [0002] Frost heave is caused by the freezing of water in the soil and the growth of ice (especially the convex mirror-shaped ice body), which causes the expansion of the soil and the uneven uplift of the ground surface. There are many factors that lead to soil frost heaving, including soil quality, water state, negative temperature environment, salt content of water and soil, pressure on the upper part of the soil layer, and so on. These factors comprehensively determine and affect the frost heaving property of soil in a certain area. In summary, there are three main aspects, namely soil, water and temperature. [0003] However, when building horizontal structures such as culverts, frame bridges, and box bridges in cold regions, the existence of horizontal structures will have adverse effects on ...

AI Technical Summary

Problems solved by technology

[0005] 1 An additional insulation layer is required, and the construction process is complicated;

[0006] 2 Under complex dynamic load and ambient temperature conditions, the long-term effect of external wall insulation alone cannot be guaranteed

[0007] 3 The packing layer processed with gravel mixed with cement has poor dynamic load resistance;

[0008] 4. The homogeneity of the filling layer cannot be guaranteed during field construction, and its integrity is poor. After experiencing multiple cycles of freezing and thawing, its anti-frost heave performance is greatly reduced, so the service life is very low, and it needs to be filled in a short period of time. renovation;

[0009] 5. The structural design of the antifreeze structure layer is unreasonable. On the one hand, it cannot effectively prevent frost heave, and on the other hand, it causes waste of materials

Images