山区高速公路高填方盖板涵填筑期土压力变化规律研究  

Research on the Change Law of Soil Pressure in the Filling Process of Highfill Slab Culverts of Expressway in Mountain Areas

作　　者：梁志勇 仇红超 贺冠军[2] 吴桂胜 欧健[2,3] 

机构地区：[1]广东省交通规划设计研究院股份有限公司,广州510507 [2]河海大学岩土工程科学研究所,南京210098 [3]河海大学岩土力学与堤坝工程教育部重点实验室,南京210098 [4]广东包茂高速公路有限公司,广东茂名525000

出　　处：《路基工程》2016年第3期88-92,103,共6页Subgrade Engineering

基　　金：广东省交通厅科技项目(201302010);中央高校业务费(2015B25514)

摘　　要：以包茂高速公路工程为依托,通过现场测试高填方路基下涵洞外界面受力,研究了涵洞受力规律和内在机制。结果表明：涵顶土压力随填土高度增大非线性增加,其中侧墙顶土压力大于填土自重且其增长率随填土增加逐渐减小,涵顶中心土压力在填土达到一定高度后大于填土自重,且其增长率保持稳定;填土完成后,两侧墙顶土压力约为填土自重的2.1～3.0倍,涵顶中部土压力约为填土自重的1.4～1.8倍;侧墙土压力小于静止土压力,实测水平土压力与静止土压力的比值为0.03～0.61;涵洞基底土压力呈不均匀分布,实测基底土压力与涵顶土压力平均值和涵洞自重之和的比值为0.24～1.58。Based on the Baotou-Maoming Expressway engineering, through field test of external stress imposed on culverts under highfill subgrade,the stress law and internal mechanism of culverts were studied.The results showed that the soil pressure on the top of culverts increased nonlinearly with the height of fill.Wherein,the soil pressure on the top of side wall was larger than the dead load of fill and the increasing rate was reduced gradually with the increase of fill. The soil pressure in the middle top of culvert would be with stable increasing rate after the fill reached a certain height and exceeded the dead load of fill. After filling,the soil pressure on the top of two side walls was about 2. 1 ～ 3. 0 times as much as the dead load of fill. The soil pressure in the middle top of culvert was about 1. 4 ～ 1. 8 times as much as the dead load of fill. The soil pressure of side wall was smaller than that of static soil. The ratio between measured horizontal soil pressure and static soil pressure was 0. 03 ～ 0. 61. The soil pressure at the bottom of culvert was unevenly distributed.The ratio between measured soil pressure at the bottom and the sum of average soil pressure on the top of culvert and dead load of culvert was 0. 24 ～ 1. 58.

关 键 词：高速公路 高路堤 盖板涵 土压力 现场测试 

分 类 号：U416.12[交通运输工程—道路与铁道工程]