|Table of Contents|

Study on response law of loess roadbed under dynamic load-seepage joint action(PDF)

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

Issue:
2025年05期
Page:
191-199
Research Field:
岩土工程
Publishing date:

Info

Title:
Study on response law of loess roadbed under dynamic load-seepage joint action
Author(s):
LIANG Leilei1;  HUANG Chao1;  XU Ke2;  WANG Wen1;  YANG Chunqi1;  HAN Rimei2;  WEN Kebing2;  PEI Hongtao2
(1. Sinohydro Engineering Bureau 8 Co., Ltd., Changsha 410004, Hunan, China; 2. Xi'an Rail Transit Group Co., Ltd., Xi'an 710082, Shaanxi, China)
Keywords:
loess subgrade;  traffic load;  pipeline leakage;  infiltration characteristic;  model test
PACS:
TU443
DOI:
10.19815/j.jace.2024.03086
Abstract:
Aiming at an city interchange loess roadbed in Xi'an, based on the field monitoring results of characteristic traffic load frequency in different periods, the influence frequency was analyzed, and the unsaturated loess roadbed dynamic load-seepage coupling model test box was established. The variation trend of parameters such as volumetric water content, pore water pressure, matrix suction and other parameters under the action of load type and dynamic load frequency synergistic pipeline leakage was explored. The results show that the dominant frequency range of pavement vibration under the influence of vehicle dynamic loads is 5-25 Hz. Under the effect of different load types, the variation trends of volumetric water content, pore water pressure, and matric suction at all monitoring points are similar. The volumetric water content under dynamic load conditions is higher than that under static load conditions, while the matrix suction and pore water pressure are on the contrary. The lag in response time is attributed to the relatively large burial depth of the monitoring points. The seepage behavior near the drainage holes is prominent, the infiltration rate reaches up to 33.3 mm·min-1 and the corresponding migration time is the shortest(0.6 min). If the dynamic load frequency is between the dominant frequency of traffic vibration(18-22 Hz), it is easy to cause resonance damage.

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Last Update: 2025-09-25