Geocell reinforced cement concrete pavement structure and surface layer plate thickness calculation method

Abstract

The invention discloses a geocell reinforced cement concrete pavement structure and a surface layer plate thickness calculation method. The pavement structure mainly comprises a base layer, a surfacelayer and a wearing layer which are sequentially laid from bottom to top. The base layer is composed of an upper geotextile layer, a lower geotextile layer and a middle geocell reinforced graded broken stone layer; the surface layer is a cement concrete layer reinforced by a geocell; the wearing layer comprises a cement mixture wearing layer and a geogrid; pull rings are reserved on the two sidesof each geocell in a road direction, the geocells are stretched to be in a tensioned state, and wooden wedges penetrate through the pull rings to fix the geocell at the outermost end. The surface layer plate thickness calculation method mainly comprises the steps of traffic analysis, initial simulation of a pavement structure, determination of pavement material parameters, and checking of load stress, temperature stress and a structure limit state. The problems that an existing pavement structure is low in strength, and a cement concrete pavement is subjected to fatigue fracture, mud pumping,slab staggering and the like under heavy-load traffic are solved, so that the pavement structure has high bearing capacity and deformation resistance, and damage to the pavement structure is reduced.

Description

technical field

[0001] The invention belongs to the technical field of highway engineering cement concrete pavement and construction, and in particular relates to a geocell-reinforced cement concrete pavement structure, a construction method and a method for calculating the thickness of a surface layer. Background technique

[0002] With the rapid development of my country's social economy, the construction of transportation infrastructure, especially high-grade highways, has developed rapidly. As a material with high strength, good stability and low cost, cement concrete has been widely used. At present, my country is the country with the longest mileage of cement concrete pavement in the world, and cement pavement is mainly distributed in rural roads and high-grade highways in China. However, due to the substantial increase in traffic volume, the expansion of the number of vehicles and natural factors, the conditions for the use of cement concrete pavement are becoming inc...

Examples

Embodiment Construction

[0081] The pavement structure and construction method of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0082] see figure 1 , the geocell reinforced cement concrete pavement structure of the present embodiment comprises a base layer 3, a surface layer 2 and a wearing layer 1 laid sequentially from bottom to top, figure 1Middle 4 is the subgrade. The base layer 3 is a graded crushed stone layer 8 reinforced with geotextiles 7 of the upper and lower layers and the geocell 9 in the middle; the surface layer 2 is a cement concrete layer 6 reinforced with the geocell 9; Layer 1 is cement mixture wearing layer 11 and geogrid 5 . see figure 2 , the geocell 9 is left with pull rings 10 on both sides along the road direction, the geocell 9 is stretched to a tensioned state, and the outermost geocell 9 is fixed through the pull ring 10 with a wooden wedge 11 .

[0083] The construction method of the above-menti...

technical field

[0001] The invention belongs to the technical field of highway engineering cement concrete pavement and construction, and in particular relates to a geocell-reinforced cement concrete pavement structure, a construction method and a method for calculating the thickness of a surface layer. Background technique

[0002] With the rapid development of my country's social economy, the construction of transportation infrastructure, especially high-grade highways, has developed rapidly. As a material with high strength, good stability and low cost, cement concrete has been widely used. At present, my country is the country with the longest mileage of cement concrete pavement in the world, and cement pavement is mainly distributed in rural roads and high-grade highways in China. However, due to the substantial increase in traffic volume, the expansion of the number of vehicles and natural factors, the conditions for the use of cement concrete pavement are becoming inc...

Examples

Embodiment Construction

[0081] The pavement structure and construction method of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0082] see figure 1 , the geocell reinforced cement concrete pavement structure of the present embodiment comprises a base layer 3, a surface layer 2 and a wearing layer 1 laid sequentially from bottom to top, figure 1Middle 4 is the subgrade. The base layer 3 is a graded crushed stone layer 8 reinforced with geotextiles 7 of the upper and lower layers and the geocell 9 in the middle; the surface layer 2 is a cement concrete layer 6 reinforced with the geocell 9; Layer 1 is cement mixture wearing layer 11 and geogrid 5 . see figure 2 , the geocell 9 is left with pull rings 10 on both sides along the road direction, the geocell 9 is stretched to a tensioned state, and the outermost geocell 9 is fixed through the pull ring 10 with a wooden wedge 11 .

[0083] The construction method of the above-menti...

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