摘要
管涵土压力作为管涵结构设计中的主要恒定荷载,其作用模式的确定是研究的重点。通过开展三种不同填土工况(碎石、粉土、黏土)下的管土相互作用足尺物理模型试验,得到不同填土工况下马蹄形管涵土压力的作用模式,并对比填土类型对管涵土压力的影响。结果表明:试验条件下,粉土工况的管顶土压力集中效应表现最强,黏土工况最弱,碎石工况介于中间。同时采取有限元软件对模型试验进行模拟分析,与试验结果较为吻合,从而为管涵土压力的进一步研究提供科学依据。
Earth pressure on the culvert is the main constant load for structure design. The distribution model of earth pressure is the focus of the study. To describe earth pressure on the horseshoe culvert, full-scale physical model tests of soil-culvert interaction were performed under three different backfill conditions and were compared. The results show that the concentration phenomenon of earth pressure on top of the stiff culvert with silt backfill becomes the most significant and it is the weakest with clay backfill under the experimentalconditions. The concentration effect of gravel backfill is in the middle of the three backfill conditions. At the same time, finite element calculation was carried out to simulate the model tests.
出处
《土木工程学报》
EI
CSCD
北大核心
2012年第1期127-133,共7页
China Civil Engineering Journal
基金
国家973项目(2007CB714001
2007CB714200)
国家自然科学基金(10702063)
浙江省自然基金(Y1080317)
中央高校基本科研业务费专项资金(2010XZZX0001)
关键词
管涵
土压力
模型试验
数值模拟
culvert
earth pressure
model test
numerical simulation
