液压夯实机补强台背路基影响因素分析.pdf

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第38 卷 第5 期 Factors of Reinforcing Subgrade on Back of
Abutment Using Hydraulic Compactor
1 2 3 2 ，4
JI Meng ， XU Tian-yu ， CHEN Ce-ce ， ZHOU Zhi-jun
（1. Fourth Engineering Co. ， Ltd. ， of CCCC Second Highway Engineering Co. ， Ltd. ， Luoyang Henan 471013， China;
2. School of Highway， Chang’an University， Xi’an Shaanxi 710064， China; 3. China Highway Engineering Consultants Co. ， Ltd. ，
Beijing 100089， China; 4. Xi’an Changda Highway Engineering Testing Center， Xi’an Shaanxi 710064， China)
Abstract
： To study the dynamic influence of hydraulic compactor on abutment in the process of reinforcing
subgrade on back of abutment， based on the subgrade filling project of the abutment back in the bridge and
tunnel transition section on an expressway， the interaction model of rammer， subgrade and abutment is
established by FE software ABAQUS. The accuracy of the model is verified by full － scale compaction test. In
the process of simulation， taking the maximum dynamic displacement and maximum dynamic strain of
abutment as the evaluation indicators， the influence of factors such as dropping distance， distance between
compacting point and abutment， initial compactness of subgrade， strength grade of abutment concrete and top
support conditions of abutment are analysed. The result shows that （1) the error between the measured and
simulated values of soil pressure caused by ramming is within 10% ， and the variation trend of dynamic
displacement and dynamic strain of abutment along the abutment height is in line with the convention， the
simulation model is reliable; （2) under the action of compaction， the maximum dynamic displacement and
maximum dynamic strain of ab