湖南理工学院学报（自然科学版）
湖南理工學院學報（自然科學版）
호남리공학원학보（자연과학판）
JOURNAL OF HUNAN INSTITUTE OF SCIENCE AND TECHNOLOGY(NATURAL SCIENCE)
2013年
4期
66-70
,共5页
李珏池%钟运秋%舒小刚%唐康皿
李玨池%鐘運鞦%舒小剛%唐康皿
리각지%종운추%서소강%당강명
公路隧道%截面形式%仰拱连接%Ansys优化分析
公路隧道%截麵形式%仰拱連接%Ansys優化分析
공로수도%절면형식%앙공련접%Ansys우화분석
highway tunnel%cross section type%inverted arch connection%Ansys optimization analysis
为实现隧道截面仰拱连接处最小弯矩应力的目标，应用有限元原理对目前我国采用较多的大跨公路隧道结构截面形式进行内力计算，通过 Ansys 优化分析边墙与仰拱的连接部位，找到最优的隧道横断面连接形式；同时考虑到现场支模等施工的需要，优化找出与仰拱直线连接时最优直线段高度。发现直线连接相对于曲线连接弯矩最大值约增大20~30％。在满足净空及工程要求条件下，最大弯矩随直线连接段高度增加出现先减小再增大的趋势，最大弯矩随围岩级别增高增大速率较大。
為實現隧道截麵仰拱連接處最小彎矩應力的目標，應用有限元原理對目前我國採用較多的大跨公路隧道結構截麵形式進行內力計算，通過 Ansys 優化分析邊牆與仰拱的連接部位，找到最優的隧道橫斷麵連接形式；同時攷慮到現場支模等施工的需要，優化找齣與仰拱直線連接時最優直線段高度。髮現直線連接相對于麯線連接彎矩最大值約增大20~30％。在滿足淨空及工程要求條件下，最大彎矩隨直線連接段高度增加齣現先減小再增大的趨勢，最大彎矩隨圍巖級彆增高增大速率較大。
위실현수도절면앙공련접처최소만구응력적목표，응용유한원원리대목전아국채용교다적대과공로수도결구절면형식진행내력계산，통과 Ansys 우화분석변장여앙공적련접부위，조도최우적수도횡단면련접형식；동시고필도현장지모등시공적수요，우화조출여앙공직선련접시최우직선단고도。발현직선련접상대우곡선련접만구최대치약증대20~30％。재만족정공급공정요구조건하，최대만구수직선련접단고도증가출현선감소재증대적추세，최대만구수위암급별증고증대속솔교대。
To achieve the target of minimum bending stress in tunnel invert junction, applying finite element theory to internal force calculation in cross section types of many long-span highway tunnel used in our country at present, the connection part of side wall and inverted arch are analyzed through Ansys optimization. We do optimization analysis to maximum bending moment in each cross section and find the optimum connection pattern of the cross section. Considering the need of the form erection, we do optimization analysis of the optimum length of the line which is connected to inverted arch. Found that the maximum bending moment approximately increase 20% in straight line connection with respect to curve connection. To meet the conditions of clearance and engineering requirements, the maximum bending moment appear the trend of decreases with the straight line connecting segment height increases, the maximum bending moment increases with rate increasing of the rock level.
