单舱及多舱六边形管廊结构的受力性能研究
|
摘要
为了解决矩形管廊受力性能较差、圆形隧道空间利用率较低的问题,根据自然界中蜂巢结构的优良特性,提出了一种新型的六边形管廊形式,并通过有限元对六边形管廊及其组合结构的受力变形特性进行了深入研究。通过对比分析发现,六边形单舱及多舱管廊的受力及变形显著优于矩形管廊,且随深度及尺寸增加优势更加明显,弯矩和变形最大分别可减小34%和60%;而在功能性方面,六边形管廊与矩形管廊接近,优于圆形隧道形式,空间利用率较好,便于多舱灵活组合。与已有双舱和四舱工程案例对比,六边形管廊的受力与变形性能均较好,且混凝土材料用量比矩形结构减小4%～9.8%。六边形单舱与多舱管廊结构在角点处容易发生应力集中,尤其是每个六边形的左右两侧角点位置内力较大,针对此受力特性,提出在两侧角部加腋的方式提高其受力性能,该优化方式对其有效利用空间的影响也较小。
According to the characteristics of honeycomb, a new type of hexagonal tunnel is proposed in order to solve the problems of poor mechanical performance of rectangular tunnels and low space utilization of circular tunnels, and the force and deformation characteristics of hexagonal tunnel and the combination are studied by finite element method. By companion, the force and deformation characteristics of hexagonal single-cabin and multi-cabin tunnel are significantly better than the rectangular structure. And with the increase of depth and size, the advantage is more obvious. The maximum bending moment and deformation can be reduced by 34% and 60% respectively. In terms of function, the hexagonal tunnel is close to the rectangular structure. It is more available to the space utilization, and more convenient for flexible combination of multi-cabins. Comparing with the existing two-cabin and four-cabin projects, the mechanical and deformation properties of the hexagonal tunnel are better, and the amount of concrete material is reduced by 4%～9.8% compared with the rectangular structure. Hexagonal tunnel generates stress concentration at corners, particularly in the left and right corners. A reinforcement measure at both corners is proposed to improve its stress performance.
According to the characteristics of honeycomb, a new type of hexagonal tunnel is proposed in order to solve the problems of poor mechanical performance of rectangular tunnels and low space utilization of circular tunnels, and the force and deformation characteristics of hexagonal tunnel and the combination are studied by finite element method. By companion, the force and deformation characteristics of hexagonal single-cabin and multi-cabin tunnel are significantly better than the rectangular structure. And with the increase of depth and size, the advantage is more obvious. The maximum bending moment and deformation can be reduced by 34% and 60% respectively. In terms of function, the hexagonal tunnel is close to the rectangular structure. It is more available to the space utilization, and more convenient for flexible combination of multi-cabins. Comparing with the existing two-cabin and four-cabin projects, the mechanical and deformation properties of the hexagonal tunnel are better, and the amount of concrete material is reduced by 4%～9.8% compared with the rectangular structure. Hexagonal tunnel generates stress concentration at corners, particularly in the left and right corners. A reinforcement measure at both corners is proposed to improve its stress performance.
引文
[1] 夏洪薇,郭路伟,龙博.复杂地下空间结构中综合管廊优化设计探讨[J].中国给水排水,2018,34(16):69- 72.
[2] 钱七虎.迎接我国城市地下空间开发高潮[J].岩土工程学报,1998,20(1):112- 113.
[3] 陈鹏,张继权,孙滢悦,等.城市内涝灾害应急救援兵棋推演研究[J].水利水电技术,2018,49(4):8- 17.
[4] 白海龙.城市综合管廊发展趋势研究[J].中国市政工程,2015(6):78- 81.
[5] 钱七虎.建设城市地下综合管廊,转变城市发展方式[J].隧道建设,2017,37(6):647- 654.
[6] 于丹,连小英,李晓东,等.青岛市华贯路综合管廊的设计要点[J].给水排水,2017,39(5):102- 105.
[7] 荣哲,孙玉品.城市综合管廊设计与计算[J].工业建筑,2013(S1):230- 232.
[8] 王述红,阿力普江·杰如拉,王鹏宇,等.预制矩形箱涵受力性能模拟及其潜在的破坏模式[J].东北大学学报(自然科学版),2018,39(2):260- 265.
[9] 曾庆红.圆形截面综合管廊及节点设计[J].建设科技,2017(1):64- 66.
[10] 赵显伟.可变形蜂窝结构的力学性能分析[D].哈尔滨:哈尔滨工业大学,2013.
[11] SCHOFIED A N,WORTH C P.Critical state soil mechanics[M].London:McGraw Hill,1968.
[12] 徐中华,王卫东.敏感环境下基坑数值分析中土体本构模型的选择[J].岩土力学,2010,31(1):258- 326.
[13] 李文翔,刘曙光,阮春生.海堤沉降计算中修正剑桥模型参数灵敏度分析[J].水运工程,2013(4):32- 36.
[14] LEE K M,GE X W.The equivalence of a jointed shield driven tunnel lining to a continuous ring structure[J].Journal of Canadian Geotechnical Engineering,2001,38:461- 483.
[15] 黄宏伟,徐凌,严佳梁,等.盾构隧道横向刚度有效率研究[J].岩土工程学报,2006,28(1):11- 18.
[16] 封坤,何川,夏松林.大断面盾构隧道结构横向刚度有效率的原型试验研究[J].岩土工程学报,2011,33(11):1750- 1758.
[2] 钱七虎.迎接我国城市地下空间开发高潮[J].岩土工程学报,1998,20(1):112- 113.
[3] 陈鹏,张继权,孙滢悦,等.城市内涝灾害应急救援兵棋推演研究[J].水利水电技术,2018,49(4):8- 17.
[4] 白海龙.城市综合管廊发展趋势研究[J].中国市政工程,2015(6):78- 81.
[5] 钱七虎.建设城市地下综合管廊,转变城市发展方式[J].隧道建设,2017,37(6):647- 654.
[6] 于丹,连小英,李晓东,等.青岛市华贯路综合管廊的设计要点[J].给水排水,2017,39(5):102- 105.
[7] 荣哲,孙玉品.城市综合管廊设计与计算[J].工业建筑,2013(S1):230- 232.
[8] 王述红,阿力普江·杰如拉,王鹏宇,等.预制矩形箱涵受力性能模拟及其潜在的破坏模式[J].东北大学学报(自然科学版),2018,39(2):260- 265.
[9] 曾庆红.圆形截面综合管廊及节点设计[J].建设科技,2017(1):64- 66.
[10] 赵显伟.可变形蜂窝结构的力学性能分析[D].哈尔滨:哈尔滨工业大学,2013.
[11] SCHOFIED A N,WORTH C P.Critical state soil mechanics[M].London:McGraw Hill,1968.
[12] 徐中华,王卫东.敏感环境下基坑数值分析中土体本构模型的选择[J].岩土力学,2010,31(1):258- 326.
[13] 李文翔,刘曙光,阮春生.海堤沉降计算中修正剑桥模型参数灵敏度分析[J].水运工程,2013(4):32- 36.
[14] LEE K M,GE X W.The equivalence of a jointed shield driven tunnel lining to a continuous ring structure[J].Journal of Canadian Geotechnical Engineering,2001,38:461- 483.
[15] 黄宏伟,徐凌,严佳梁,等.盾构隧道横向刚度有效率研究[J].岩土工程学报,2006,28(1):11- 18.
[16] 封坤,何川,夏松林.大断面盾构隧道结构横向刚度有效率的原型试验研究[J].岩土工程学报,2011,33(11):1750- 1758.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |