Comparative experimental research on falling ball test method and K30 plate load method on foundation of different structures

Yingqi Xue,Mengjie Wang,Luwan Wang,Xiaokun Han,H Zhang,H Abdul Aziz

doi:10.1051/e3sconf/202127602025

Yingqi Xue, Mengjie Wang + Show 4 more

Open Access

https://doi.org/10.1051/e3sconf/202127602025

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Abstract

In highway and railway foundation projects, the mechanical properties of foundation materials are one of the main indicators of construction process control. The elastic modulus of foundation directly affects road surface deflection and must be tested. The falling ball test method and the K30 plate load method are widely used in engineering, In order to explore the relationship between the two methods and guide the engineering application, the falling ball test method and the K30 plate load method are applied to homogeneous materials (homogeneous fine-grained material layers) and layered materials(Old foundation).Through comparative test, we found that there is a strong correlation between the falling ball test method the K30 plate load method in some scenarios,which can be used for mutual reference in engineering experiments.

Highlights

IntroductionIn roadbed projects such as expressways and railways, the mechanical properties of roadbed materials (including the modulus of deformation and modulus of resilience, etc.) are one of the main indicators during the construction process
In roadbed projects such as expressways and railways, the mechanical properties of roadbed materials are one of the main indicators during the construction process
The modulus of resilience is one of the most sensitive parameters that affect the thickness of the pavement structure, and it is the main factor which affects the deflection of the road surface

Summary

Introduction

In roadbed projects such as expressways and railways, the mechanical properties of roadbed materials (including the modulus of deformation and modulus of resilience, etc.) are one of the main indicators during the construction process. When the subgrade construction is completed according to the design requirements, the test of subgrade’s modulus of resilience should be carried out according to the requirements of the test specifications, so as to provide a reference for the construction of the pavement structure, and ensure the quality of the road[1,2]. According to the current technical specifications for subgrade construction in China, the test methods for the quality of on-site subgrade filling engineering mainly includes K30 plate load method, California bearing ratio method (CBR), digging and filling sand, and falling weight deflection tester method (FWD) and so on. We select a homogenized fine material layer and the old foundation to test[4]

Technology Introduction

Principles of the K30 plate load method

Comparison test

Conclusions