小净距隧道施工方法优化研究
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摘要
以河源洞小净距隧道为工程背景,通过模拟研究比较不同施工方法下的塑性区、位移、应力情况.研究结果表明:侧壁导坑法施工中对围岩开挖次数较多,围岩受到的扰动较大,塑性区范围比台阶法大;在相同的开挖次数下,CRD(中隔墙)法施工产生的塑性区范围又大于侧壁导坑法.对于围岩条件较差的情况,控制位移是施工中应该注意的一项重要工作,侧壁导坑法施工对于控制位移的增量有明显优越性,所以在软弱地层可以优先考虑采用.
The simulation research was studied for comparing plastic zone,displacement and stress conditions in different constructions methods in small clear distance tunnel in Heyuandong.The results show that the method of double side excavation excavates many more times in the rock,and it leads to more disturbance suffered by the surrounding rock,so the scope of the plastic zone is larger than excavated by the way of steps excavation;in the same excavation times,CRD(mid-partition) method get larger scope of plastic zone than double side excavation.In poor condition of surrounding rock,controlling displacement is an important job that should be paid attention to in the construction.The method of double side excavation has obvious advantages in order to control the displacement of the delta,so it has priority to be considered to use in weak stratum.
The simulation research was studied for comparing plastic zone,displacement and stress conditions in different constructions methods in small clear distance tunnel in Heyuandong.The results show that the method of double side excavation excavates many more times in the rock,and it leads to more disturbance suffered by the surrounding rock,so the scope of the plastic zone is larger than excavated by the way of steps excavation;in the same excavation times,CRD(mid-partition) method get larger scope of plastic zone than double side excavation.In poor condition of surrounding rock,controlling displacement is an important job that should be paid attention to in the construction.The method of double side excavation has obvious advantages in order to control the displacement of the delta,so it has priority to be considered to use in weak stratum.
引文
[1]TB10003-2005铁路隧道设计规范[S].TB10003-2005 Code for design of rail tunnel[S].(in Chinese)
[2]姚勇,田志宇.并设小净距隧道中岩墙力学特征及加固措施研究[J].工业建筑,2006,36(4):57-60.YAO Yong,TIAN Zhiyu.Study on mechanical behavior and reinforcingmeasures of middle rock wall parallet tunnel with small interval[J].Industrial Construction,2006,36(4):57-60.(in Chinese)
[3]杨小礼,眭志荣.浅埋小净距偏压隧道施工工序的数值分析计算[J].中南大学学报(自然科学版),2007,38(4):764-770.YANG Xiaoli,SUI Zhirong.Numerical simulation of constructionsequence for shallowembedded bias tunnels with small clear distance[J].Journal of Central South University(Science and Technology),2007,38(4):764-770.(in Chinese)
[4]李云鹏,王芝银,韩常领.不同围岩类别小间距隧道施工过程模拟研究[J].岩土力学,2006,27(1):11-16.LI Yunpeng,WANG Zhiyin,HAN Changling.Simulating study onconstruction process of tunnels with small spacing for difference classesof surrounding rocks[J].Rock and Soil Mechanics,2006,27(1):11-16.(inChinese)
[5]李云鹏,王芝银,韩常领.考虑地震影响的小间距隧道围岩流变损伤[J].长安大学学报(自然科学版),2006,26(2):51-56.LI Yunpeng,WANG Zhiyin,HAN Changling.Rheologic damage andearthquake influence on surrounding rock of small spacing tunnels[J].Journal of Changan University(Natural Science Edition),2006,26(2):51-56.(in Chinese)
[6]张玉军,朱维申,杨家岭.近距离双隧道开挖与支护稳定性的粘弹塑性有限元计算[J].岩石力学与工程学报,1999,18(s):855-559.ZHANG Yujun,ZHU Weishen,YANG Jialin.Sticky elastic-plasticfinite element calculation of excavation and supporting stability in doubletunnel of small distance[J].Chinese Journal of Rock Mechanics andEngineering,1999,18(s):855-559.(in Chinese)
[7]姚勇,晏启祥,周俐俐.小净距隧道在不同开挖方式下的力学效应分析[J].西南科技大学学报,2005,20(2):53-56.YAO Yong,YAN Qixiang,ZHOU Lili.Study on mechanics effect ofsmall-distance tunnels located at soft ground[J].Journal of SouthwestUniversity of Science and Technology,2005,20(2):53-56.(in Chinese)
[8]晏启祥,何川,姚勇.软岩隧道施工特性及其动态力学行为研究[J].岩石力学与工程学报,2006,25(3):572-577.YAN Qixiang,HE Chuan,YAO Yong.Study on constructioncharacteristic and dynamic behavior of soft rock tunnel[J].ChineseJournal of Rock Mechanics and Engineering,2006,25(3):572-577.(inChinese)
[2]姚勇,田志宇.并设小净距隧道中岩墙力学特征及加固措施研究[J].工业建筑,2006,36(4):57-60.YAO Yong,TIAN Zhiyu.Study on mechanical behavior and reinforcingmeasures of middle rock wall parallet tunnel with small interval[J].Industrial Construction,2006,36(4):57-60.(in Chinese)
[3]杨小礼,眭志荣.浅埋小净距偏压隧道施工工序的数值分析计算[J].中南大学学报(自然科学版),2007,38(4):764-770.YANG Xiaoli,SUI Zhirong.Numerical simulation of constructionsequence for shallowembedded bias tunnels with small clear distance[J].Journal of Central South University(Science and Technology),2007,38(4):764-770.(in Chinese)
[4]李云鹏,王芝银,韩常领.不同围岩类别小间距隧道施工过程模拟研究[J].岩土力学,2006,27(1):11-16.LI Yunpeng,WANG Zhiyin,HAN Changling.Simulating study onconstruction process of tunnels with small spacing for difference classesof surrounding rocks[J].Rock and Soil Mechanics,2006,27(1):11-16.(inChinese)
[5]李云鹏,王芝银,韩常领.考虑地震影响的小间距隧道围岩流变损伤[J].长安大学学报(自然科学版),2006,26(2):51-56.LI Yunpeng,WANG Zhiyin,HAN Changling.Rheologic damage andearthquake influence on surrounding rock of small spacing tunnels[J].Journal of Changan University(Natural Science Edition),2006,26(2):51-56.(in Chinese)
[6]张玉军,朱维申,杨家岭.近距离双隧道开挖与支护稳定性的粘弹塑性有限元计算[J].岩石力学与工程学报,1999,18(s):855-559.ZHANG Yujun,ZHU Weishen,YANG Jialin.Sticky elastic-plasticfinite element calculation of excavation and supporting stability in doubletunnel of small distance[J].Chinese Journal of Rock Mechanics andEngineering,1999,18(s):855-559.(in Chinese)
[7]姚勇,晏启祥,周俐俐.小净距隧道在不同开挖方式下的力学效应分析[J].西南科技大学学报,2005,20(2):53-56.YAO Yong,YAN Qixiang,ZHOU Lili.Study on mechanics effect ofsmall-distance tunnels located at soft ground[J].Journal of SouthwestUniversity of Science and Technology,2005,20(2):53-56.(in Chinese)
[8]晏启祥,何川,姚勇.软岩隧道施工特性及其动态力学行为研究[J].岩石力学与工程学报,2006,25(3):572-577.YAN Qixiang,HE Chuan,YAO Yong.Study on constructioncharacteristic and dynamic behavior of soft rock tunnel[J].ChineseJournal of Rock Mechanics and Engineering,2006,25(3):572-577.(inChinese)
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