Method to Eliminate Frost Heave Damage Effect of Water Conveyance Channels without Ice Cover and High Water Level Operation in Seasonal Frozen Soil Areas in Winter

Abstract

The invention relates to a method for avoiding frost heaving damage of a water delivery canal applied to a seasonally-frozen soil region and particularly relates to a method for eliminating a frost heaving damage effect of a water delivery canal having no ice covers in winter and operating at a high water level in a seasonally-frozen soil region. The method comprises: 1) the cross section of a rigid lined canal of the water delivery canal adopts a composite section way, the section below the top surface of a canal bank or a canal embankment is a trapezoidal section, and the section above the canal bank or the canal embankment is a rectangular section; 2) water in the canal plays a role in preserving the heat of canal foundation soil according to the characteristic of high specific heat capacity of the water in the canal, so that the aim that the canal foundation soil is not frozen in the whole winter is achieved, the frost heaving of the water delivery canal is eliminated, and the water level surface in the canal in the whole winter is not lower than the top surface of the canal bank or the canal embankment; and 3) no soil is provided at the outer side of a straight water retaining wall canal on the rectangular section of the canal, namely no soil is provided at the rear of the straight water retaining wall above the top surface of the canal bank or the canal embankment, so that the straight water retaining wall naturally has no the frost heaving effect. By using the method, the frost heaving effect of the canal foundation soil to a rigid lining layer of the canal is eliminated, and a rigid lining plate of the canal can be prefabricated, so that the commercialization of a canal concrete product is realized; and the canal can be built by water-running construction, so that the construction period can be shortened.

Description

technical field [0001] The invention relates to an anti-frost heave damage method for water delivery channels applied in seasonally frozen soil regions, in particular to a design method for eliminating frost heave damage effects of water delivery channels operating at high water levels without ice covers in winter in seasonally frozen regions. Background technique [0002] Canals lined with precast concrete slabs have the advantages of strong anti-scouring and anti-seepage capabilities and quick construction. However, cracks, uplifts and even landslides often occur due to frost heave of canal foundation soil in northern water transmission projects. In order to solve the frost heave damage of the channel, on the one hand, people improved the frost heaving ability of the channel, changed the prefabricated concrete slab into a cast-in-place concrete slab, and even increased the thickness of the concrete from 5cm to 10cm, or even larger; on the other hand, people According to th...

AI Technical Summary

Problems solved by technology

[0008] The present invention aims to solve the problem of channel damage of water delivery channels in winter in seasonal frozen soil areas due to frost heaving of channel foundation soil under the current technical situation that people have no clear understanding of the mechanism of frost heave damage of water delivery channels in winter in seasonal frozen soil areas. , proposed a method to eliminate the damage caused by frost heaving of water delivery channels operating at high water levels in winter in seasonally frozen regions

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