The Control of Resilient Modulus of Soft Rock as Filling Material for#br#
 Subgrade Based on Dynamic Deformation Control Method

Abstract

Abstract:

Based on deformation compatibility principle of subgrade and pavement, combined with the pavement deflection control standard of current highway related code, the tolerance value of dynamic deformation of soft rock subgrade top is obtained. The theoretical solutions of elastic multilayered road structures under dynamic doublecircular loads are derived by using the transmissionreflection matrix method and the superposition principle. The dynamic deformation of soft rock subgrade top is deduced with inverse Hankel transformation. The critical value of resilient modulus of soft rock filled in area is determined based on the dynamic deformation control method. According to the thickness of the subgrade structure provided by the existing highway code, control requirements of the resilient modulus of the soft rock filler satisfying the condition of dynamic deformation is put forward, and the soft rock filler is classified according to the resilient modulus. The results of this research can provide guidance for the optimization of the soft rock filler.

Key words: soft rock subgrade, dynamic deformation control, multilayered road structure, transmissionreflection matrix method, soft rock classification

CLC Number:

TU 473.1

ZHAN Yongxiang1，LONG Xiaobo2，YAO Hailin1，ZHANG Jingbo3，CHEN Yu4. The Control of Resilient Modulus of Soft Rock as Filling Material for#br# Subgrade Based on Dynamic Deformation Control Method[J]. Journal of Shanghai Jiaotong University, 2017, 51(4): 450-.

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The Control of Resilient Modulus of Soft Rock as Filling Material for#br# Subgrade Based on Dynamic Deformation Control Method

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