|Table of Contents|

Vibration Isolation Effect and Parameter Optimization of Rubber Gasbag in Foundation Dynamic Compaction(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2020年01期
Page:
111-119
Research Field:
Publishing date:

Info

Title:
Vibration Isolation Effect and Parameter Optimization of Rubber Gasbag in Foundation Dynamic Compaction
Author(s):
YAO Zhan-yong1 SUN Meng-lin1 KONG Jun2 PENG Jun-qiang2 JIANG Hong-guang1 LI Hui1
(1. School of Qilu Transportation, Shandong University, Jinan 250002, Shandong, China; 2. Qilu Transportation Development Group, Jinan 250101, Shandong, China)
Keywords:
foundation rubber airbag dynamic compaction vibration isolation efficiency parameter optimization
PACS:
TU476
DOI:
10.19815/j.jace.2018.11055
Abstract:
The vibration isolation effect of rubber airbag was studied by indoor model test of dynamic compaction and the vibration isolation parameters were optimized. The single-factor analysis method was used to carry out the indoor rubber airbag model tests of different vibration isolation width, vibration isolation distance, vibration isolation length and vibration isolation depth. The vibration isolation efficiency of rubber airbag was analyzed by detecting the maximum acceleration of particle vibration on both sides of the vibration isolation plate. The influence of different isolation parameters on the isolation efficiency of rubber airbag was studied. The results show that the rubber airbag has good vibration isolation effect under the ramming energy of 1 500 kN·m. The vibration isolation width has no effect on the vibration isolation effect of rubber airbag. When the distance between the vibration source and the measuring points of the two sensors is the same, the vibration isolation distance has no effect on the vibration isolation effect of rubber airbag. The vibration isolation effect of rubber airbag is greatly influenced by the vibration isolation length within 12 m and the vibration isolation depth within 6 m, and the vibration isolation effect does not increase significantly after the two parameters go beyond their respective ranges. The effect of vibration isolation depth on the vibration isolation efficiency of rubber airbag is higher than that of vibration isolation length. Under the ramming energy of 1 500 kN·m, the optimal vibration isolation parameters of rubber airbag are the vibration isolation length is 12 m, the vibration isolation depth is 6 m. The vibration isolation width and vibration isolation distance can be determined according to field conditions. The field test of dynamic compaction verifies that the vibration isolation effect of rubber airbag under the ramming energy of 1 500 kN·m is better than that of gravel filled ditch, and the vibration isolation efficiency of rubber airbag is about 95% of that of hollow ditch. The related results can provide reference for the application of vibration control technology of foundation dynamic compaction.

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Last Update: 2020-01-13