理論研究 2024年 第53卷 第21期

DOI: 10. 7672 / sgjs2024210114

土體參數對高填方公路拱涵受力特性的影響研究

朱建明

作者簡介：

朱建明，高級工程師，E?mail:jihsdjshdjosd@ yeah. net

作者單位：

中鐵十一局集團第二工程有限公司，湖北十堰 442000

基金項目：

?中鐵十一局集團科研課題

摘要：

為研究不同土體參數條件下高填方公路拱涵受力特性，依托萍蓮高速公路工程，通過數值模擬計算，分析不同地基土、上填土模量對拱涵周圍土壓力分布的影響及拱涵環向應力分布規律。研究結果表明，隨著地基土模量的增大，涵頂土壓力和涵側土壓力基本逐漸減小，涵洞基底反力逐漸增大，地基土模量的增大有利于拱涵結構的穩定；隨著上填土模量的增大，涵頂土壓力、涵洞基底反力及涵側土壓力基本逐漸減小，上填土模量的增大可減小拱涵結構受力；上填土模量對拱圈應力無明顯影響。在拱涵施工過程中，建議地基土和上填土采用模量大的巖土體。

English：

In order to study the stress characteristics of high fill highway arch culverts under different soilparameter conditions, based on the Pinglian Expressway project, numerical simulation calculations werecarried out to analyze the influence of different foundation soil and filling soil modulus on the distributionof soil pressure around the arch culvert and the distribution law of circumferential stress of the archculvert. The research results show that as the modulus of the foundation soil increases, the soil pressureon the top and sides of the arch culvert gradually decreases, and the reaction force on the arch culvertbase gradually increases. The increase in the modulus of the foundation soil is beneficial for the stabilityof the arch culvert structure. As the modulus of the filling soil increases, the soil pressure on the top andsides of the arch culvert, the reaction force on the arch culvert, and the soil pressure on the sides of thearch culvert gradually decrease. The increase in the modulus of the filling soil can reduce the stress onthe arch culvert structure. The modulus of the filling soil has no significant effect on the stress of the archring. During the construction of arch culverts, it is recommended to use rock and soil with high modulusfor the foundation soil and filling soil.