Rigid-flexible base double-slope transition structure and construction method thereof

Abstract

The invention discloses a rigid-flexible base double-slope transition structure and a construction method thereof. The rigid-flexible base double-slope transition structure is characterized by being sequentially provided with a cement stabilized crushed stone lower base, a graded crushed stone lower base, a graded crushed stone upper base and a cement stabilized crushed stone upper base from bottom to top; a geotechnical grille is arranged between the graded crushed stone lower base and the graded crushed stone upper base; an upper surface of the cement stabilized crushed stone upper base is sequentially provided with a lower surface layer, a middle surface layer and an upper surface layer from bottom to top; and a first slope transition section and a second slope transition section are arranged in a longitudinal section of the transition structure separately, a structural steel frame is arranged according to an outer contour shape of the graded crushed stone upper base, and the graded crushed stone upper base is laid in a frame of the structural steel frame. According to the rigid-flexible base double-slope transition structure and the construction method, good transition from a semi-rigid base to a flexible base, including from a rigid base to the flexible base, can be realized, the structure is stable, and the engineering quality can be effectively improved.

Description

technical field [0001] The invention belongs to the field of road engineering, and more specifically relates to a rigid-flexible base double-slope transition structure and a construction method thereof. Background technique [0002] Since the 1950s, our country began to use lime soil as the pavement base in road construction, and in the following decades, lime-stabilized semi-rigid materials have been the main base type of high-grade highways in my country. In the mid-1970s, my country began to use cement stabilized materials as the base. Since the 1990s, semi-rigid materials represented by cement stabilized materials and lime and fly ash stabilized materials have accounted for more than 95% of the pavement base materials of various grades. The semi-rigid base has a certain board body, rigidity, and strong diffusion stress, and has a certain tensile strength, fatigue resistance, and good water stability. These are all in line with the requirements of the pavement base, so ...

AI Technical Summary

Problems solved by technology

In actual construction, the semi-rigid base course and the flexible base course have uneven settlement due to the difference in different material properties of different base courses, and their respective settlements are different, resulting in frequent cracks and even fractures, which affect the driving speed and driving comfort. endanger driving safety;

[0007] 2. Due to the looseness of the graded crushed stone material, it is not easy to form during the construction process, and the slope elevation of the slope surface is difficult to control

[0008] 3. Due to the difference in material properties between the transition sections, the existing semi-rigid base or flexible base engineering acceptance criteria are not applicable to this road section, and a complete set of specific acceptance criteria has not been formed, which has caused great damage to the construction. the inconvenience

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