特浅覆土下穿高速公路框架桥顶进施工路面沉降分析  

Analysis on Pavement Settlement During Jacking Construction of Super Shallow Overburden under Expressway Frame Bridge

作　　者：彭红益 万小龙 傅国庆 刘运思[2,3] Peng Hong-yi;Wan Xiao-long;Fu Guo-qing;Liu Yun-si

机构地区：[1]中国建筑第五工程局土木工程有限公司,长沙410075 [2]湖南科技大学土木工程学院,湖南湘潭411201 [3]湖南科技大学岩土工程稳定控制与健康监测省重点实验室,湖南湘潭411201

出　　处：《建筑技术开发》2021年第15期103-104,共2页Building Technology Development

摘　　要：依托长沙物流大道东段AK0+246.796与京港澳高速临长段K1485+37.0相交处下穿京港澳高速公路框架桥工程,基于Midas/GTS数值模拟框架桥顶进施工过程,分析了框架桥顶进施工过程中上方路面变形规律。结果表明,(1)在框架桥的起始开挖面处,路面变形量最大;(2)框架桥中隔墙上方路面变形表现为隆起,而两跨跨中上方路面变形表现为沉降,框架桥上方横向路面变形大致呈“W”形变化,沿顶进方向路面变形值逐渐减小。Based on AK0+246.796 and K1485+37.0 intersection of Beijing-Hong Kong and Macao Freeway,the frame bridge of Beijing-Hongkong-Macao Freeway is used to simulate construction process of the frame bridge on the basis of Midas/GTS numerical simulation.The deformation law of the upper pavement in the construction process of frame bridge jacking is analyzed.The results show that:(1)at the initial excavation surface of the frame bridge,deformation of the pavement is largest;(2)the pavement above the partition wall of the frame bridge is deformed upliftedly,and deformation of the pavement above the middle span of the two spans appears settlement,deformation of the transverse pavement above the frame bridge shows approximately“W”type,along jacking direction,deformation value of the pavement gradually decreases.

关 键 词：框架桥 顶进施工 路面变形 

分 类 号：TU753.8[建筑科学—建筑技术科学]