高填方涵洞受力特性现场测试及数值模拟研究-《郑州大学学报(工学版)》

文章信息/Info

Title:: Field Test and Numerical Simulation of Mechanical Characteristicof Culverts under High Embankments

Author(s):: ZHAO Jianbin; SHEN Junmin; DONG Lishan; Key Lab of Highway Construction & Maintenance ’Technology in Loess Region, Shanxi Transportation Research institute,Taiyuan 030006 ,China

Keywords:: road engineering; verlical earth pressure ; coneentralion faelor; culvert; offset load elfeel

Abstract:: Based on the projeet of the culvert under high embankment in the expressway from Kelan to Linx-ian, the vertieal earth pressure and the stress of the culvert areh ring are monitored by the field tests, and ae-eording to the monitoring results, the analysis on the distribution characteristies and variation laws are condue.ted. Meanwhile, in order to verily and study the monitoring results, a 3D finite differenee model has beenbuilt to obtain the stress and displaeement fields of the high fill embankment. The results show that. the stiffness dilflerenee belween the eulvert and the fill is the main reason of the coneentration of the vertical earthpressure on the top of culvert, and the coneentration faetor inereases signilieantly with the height of the fills inereasing at the early stage, then it remains stable; the maximum tensile stress is present to the vault of archeulvert, while the maximum compressive stress between the haunch and the skewback of the arch ring; in or.der to avoid eracking, it’s proposed that the arch ring should be reinforeed beeause of the high fill loading onthe top of eulvert; the slope ean share a part of the fill load, leading to the olfset load effeet to the structure olthe culvert, which must be noled when it is constructed near the slope.