Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Roadbed rebound modulus testing method based on double-rear-axle inspection car

A technology of resilience modulus and test method, which is applied to the field foundation soil survey, roads, roads, etc., can solve the problems of non-standard standard vehicles, affecting the accuracy of subgrade resilience modulus measurement, etc., so as to overcome the test error. , detect a reasonable effect

Active Publication Date: 2015-05-20
SHANXI PROVINCIAL RES INST OF COMM
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: how to solve the problem that the use of standard vehicles is not standard, which affects the accuracy of the measurement of the modulus of resilience of the roadbed

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Roadbed rebound modulus testing method based on double-rear-axle inspection car
  • Roadbed rebound modulus testing method based on double-rear-axle inspection car

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] Such as figure 1 As shown, the present invention mainly adopts a double-rear-axle eight-wheel truck as a deflection detection vehicle to detect the rebound deflection of different subgrade deflection measurement points, and further calculate the rebound modulus of different measurement points of the subgrade respectively to obtain different measurement points. The arithmetic mean value of the point rebound modulus is used as the rebound modulus of the subgrade.

[0017] Combined with the roadbed entity project, explain the method of the present invention: use a Foton truck or an Iveco Hongyan double rear axle truck, check that the inflation pressure of each tire of the double rear axle truck is 1.20±0.05 MPa; add goods to the double rear axle truck slot, Ensure that the axle load of the dual rear axles is 200±1 kN; adjust the relative position of the goods to ensure that the difference between the rear axle and the rear front axle load is less than 2 kN; place the probe...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a roadbed rebound modulus testing method based on a double-rear-axle inspection car. A double-rear-axle eight-wheel van is used as the inspection car; meanwhile, rebound flexure detection of different flexure detection points (a wheel gap and a wheel inner side) of a roadbed is carried out; a formula shown in the specification is used for calculating roadbed rebound modulus of the different flexure detection points (the wheel gap and the wheel inner side) respectively according to rebound flexure values of the different flexure detection points and corresponding flexure coefficients; and an arithmetic average value of the roadbed rebound modulus of the different flexure detection points (the wheel gap and the wheel inner side) is calculated to be used as the rebound modulus of the measured roadbed. According to the roadbed rebound modulus testing method, a phenomenon that a standard car is not standard in a detection field can be effectively avoided; the roadbed rebound modulus is inversely calculated, and flexure detection results of the different detection points can be mutually proved; and a testing error, caused by the fact that wheel loads on the left and right sides of the inspection car are unbalanced, is overcome so that the roadbed rebound modulus detection is reasonable and accurate.

Description

technical field [0001] The invention belongs to the technical field of roadbed performance evaluation, and in particular relates to a roadbed rebound modulus test method based on a double rear axle inspection vehicle. Background technique [0002] The modulus of resilience of the subgrade is the only mechanical index to characterize the characteristics of the subgrade in the structural design of asphalt pavement. The accurate determination of this index is very important for the design of asphalt pavement. In the current "Highway Subgrade Pavement Field Test Regulations JTG E60-2008", the load-bearing plate method (T 0943-2008) and the Beckman beam method (T 0944-1995) are used to directly measure the modulus of resilience of the subgrade. [0003] In the on-site subgrade modulus of resilience test, the bearing plate method needs to use jacks to load and unload step by step. The test process is slow and the convenience is poor. Therefore, the Beckman beam method is often use...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): E01C23/01E02D1/00
CPCE02D1/00E02D1/022
Inventor 张晓燕成志强常爱国孔繁盛梁斌
Owner SHANXI PROVINCIAL RES INST OF COMM
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com