Method for determining laying thickness of asphalt overlay upon cement concrete pavement
A technology of overlay and cement concrete, which is applied in the field of road construction, can solve problems such as insufficient shear resistance, and achieve the effect of ensuring the shear thickness
Active Publication Date: 2019-12-31
CHONGQING JIAOTONG UNIVERSITY
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Problems solved by technology
[0003] The purpose of the present invention is to provide a research on the shearing problem between the cement concrete pavement asphalt overlay, from the perspective of design rationality, aiming at the various problems of the current overlay layer due to insufficient shearing resistance, a comprehensive solution is made. Analytical and researched method for determining the pavement thickness of asphalt overlay on cement concrete pavement
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[0034] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0035] In describing the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than Nothing indicating or implying that a referenced device or element...
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Abstract
The invention discloses a method for determining laying thickness of an asphalt overlay upon a cement concrete pavement. The method for determining the laying thickness of the asphalt overlay upon thecement concrete pavement comprises the steps of calculating shearing stress of the asphalt overlay upon the cement concrete pavement; obtaining shearing stress data of the asphalt overlay upon the cement concrete pavement by combining an elastic multi-layer system management theory; comparing and analyzing the obtained shearing stress data and reference data; carrying out indoor test to obtain test data of shear strength of each layer and shear strength between each layer; according to a Culon-morper rule, obtaining an overlay shear envelope curve; comparing the shearing stress data with thetest data to obtain a laying thickness value based on the interlayer shear strength of the overlay. The purposes that the interlayer shear problem of the asphalt overlay upon the cement concrete pavement is studied, comprehensive analysis and research are made on various problems caused by insufficient shear capacity of an existing overlay from an angle of design reasonability, and the laying thickness of the asphalt overlay upon the cement concrete pavement is determined to guarantee the shear thickness of the overlay are realized.
Description
technical field [0001] The invention relates to the technical field of road construction, in particular to a method for determining the pavement thickness of an asphalt overlay on a cement concrete road surface. Background technique [0002] In the current asphalt overlay design of cement concrete pavement, whether it is the deflection method of the American Asphalt Association (AI), the insufficient thickness gap method of the US Army Corps of Engineers (COE), the American AASHTO empirical method, or the "Highway Cement Concrete Pavement Design The methods of the Standard (JTG D40-2002) are all designed for reflective cracks on the pavement. The main control parameters are the deflection value of the pavement and the value of the interlayer bending and tensile stress. Considering the interlayer shear strength of the package disease problem, and it is precisely this kind of problem that may be the cause of many road diseases (especially mountainous urban roads). In addition...
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IPC IPC(8): E01C7/35G01N3/24G06F17/50
CPCE01C7/353G01N3/24G01N2203/0075G01N2203/0226G01N2203/0605G01N2203/0682
Inventor 傅翔黄平班宇鑫谢强王侠茜曾彬涂义亮向茂铭
Owner CHONGQING JIAOTONG UNIVERSITY