[1]冯忠居,董芸秀,潘放,等.沟谷地形对高填方盖板涵受力及填土沉降特性的影响[J].长安大学学报(自然科学版),2019,39(03):53-64.
　FENG Zhong ju,DONG Yun xiu,PAN Fang,et al.Influence of gully topography on stress of high fill slab culverts and settlement characteristics of fill[J].Journal of Chang’an University (Natural Science Edition),2019,39(03):53-64.
点击复制

沟谷地形对高填方盖板涵受力及填土沉降特性的影响()
分享到：

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
第39卷
期数:
2019年03期
页码:
53-64
栏目:
桥梁与隧道工程
出版日期:
2019-05-15

文章信息/Info

Title:
Influence of gully topography on stress of high fill slab culverts and settlement characteristics of fill
作者:
冯忠居; 董芸秀; 潘放; 郝宇萌; 李少杰; 建鑫龙
(1. 长安大学 公路学院，陕西 西安 710064； 2. 陇东学院 土木工程学院，甘肃 庆阳 745000； 3. 广东省高速公路有限公司，广东 广州 510000； 4. 中交第二公路勘察设计研究院有限公司，湖北 武汉 430056； 5. 广东大潮高速公路有限公司，广东 广州 510000)
Author(s):
FENG Zhongju1;  DONG Yunxiu1; 2;  PAN Fang3;  HAO Yumeng4;  LI Shaojie1;  JIAN Xinlong5
(1. School of Highway, Changan University, Xian 710064, Shaanxi, China; 2. School of Civil Engineering, Longdong University, Qingyang 745000, Gansu, China; 3. Guangdong Province Expressway Co., Ltd, Guangzhou 510000, Guangdong, China; 4. CCCC Second Highway Consultant Co., Ltd., Wuhan 430056, Hubei, China; 5. Guangdong Dachao Expressway Co., Ltd, Guangzhou 510000, Guangdong, China)
关键词:
桥梁工程; 岩土工程; 沟谷地形; 离心模型试验; 盖板涵; 土压力; 沉降变形
Keywords:
bridge engineering;  geotechnical engineering;  gully topography;  centrifugal model test;  slab culvert;  earth pressure;  settlement deformation
文献标志码:
A
摘要:
为探明山区沟谷地形对高填方盖板涵受力特性和填土沉降变形特性的影响，通过离心模型试验，选用自主研发的能够反映地形涵洞填土相互作用的模型试验平台，分析了不同沟谷宽度B和不同沟谷坡度α下盖板涵的涵土界面土压力、涵顶填土沉降变形、涵洞结构内力以及涵顶垂直土压力集中系数Ks的变化特征，并提出了相关的工程技术建议。研究结果表明：涵土界面土压力、涵顶垂直土压力集中系数Ks与沟谷宽度呈正相关，与沟谷坡度呈负相关；盖板涵涵顶土体沉降变形呈W形分布，随沟谷宽度的增大，涵顶土体内外沉降差δ逐渐增大；随沟谷坡度的增大，涵顶土体内外沉降差变化为δ→0→-δ；沟谷宽度为1.5D~5D时（D为涵洞计算跨径），对应等沉面〖JP2〗高度变化范围为12.2~13.7 m；沟谷坡度为0°~60°时，对应等沉面高度变化范围为12.5~13.7 m，〖JP〗提出可用等沉面高度界定高填方涵洞，可取14 m作为其界定高度；盖板涵盖板下缘、涵底上缘中部受拉应力，盖板下缘为盖板涵结构受力最不利位置；高填方盖板涵施工时应充分利用原有地形，在确保边坡稳定的前提下，尽量保留边坡，或人为反开挖施工，增加沟坡、减小沟宽，坡体以沟谷宽度B≤3D、沟谷坡度α≥45°为宜。
Abstract:
To study the influence of the gully topography on the stress of high fill slab culverts and settlement characteristics of the fill, a centrifugal model test was carried out, using a selfdeveloped model test platform which can reflecting the interactions among the topography, culvert, and fill. The variation characteristics of the earth pressure of the culvertsoil interface, fill settlement, internal force of the culvert structure, and the vertical soil pressure concentration coefficient Ks under different valley widths B and different valley slopes α were analyzed. Furthermore, relevant engineering technical recommendations were presented. The results show that the earth pressure of the culvertsoil interface and the vertical soil pressure concentration coefficient Ks are positively correlated with the valley widths, and are negatively correlated with the valley slopes. The settlement of the fill at the culvert top shows a W shaped distribution. With an increase in the valley widths, the difference between the internal and external settlements of the soil increases gradually. Further, with an increase in the valley widths, the settlement δ of the fill gradually increases. With an increase in the slopes of the valley, the settlement difference between the inside and outside of the fill is δ→0→-δ. When the gully width is 1.5D to 5D, where D is the culvert span, the range of change in the equal settlement section height is 12.2 to 13.7 m. When the gully slope is 0° to 60°, the range of change in the equal settlement section height is 12.5 to 13.7 m. Moreover, the equal settlement section height is used to determine whether the culvert is a high fill culvert, and 14 m is taken as the defined height. The lower edge of the cover plate and the middle of the upper edge of the culvert floor are subjected to a tensile stress, and the lower edge of the cover plate is the most unfavorable position of the slab culvert structure. The construction of high fill slab culverts can make full use of the original topography. Under the premise of slope stability, to retain the gully as far as possible, or to apply antiexcavation construction methods, artificially increase the gully gradient and reduce the gully width. A gully width of B≤ 3D and a gully slope of α≥45° are advisable. 3 tabs, 17 figs, 26 refs.

相似文献/References:

[1]李宇,朱晞,杨庆山,等.高墩大跨桥梁结构的脆弱性分析[J].长安大学学报(自然科学版),2012,32(01):0.
[2]高亮,刘健新,张丹,等.桁架桥主梁三分力系数试验[J].长安大学学报(自然科学版),2012,32(01):0.
[3]刘旭政,王丰平,黄平明,等.斜拉桥各构件校验系数的常值范围[J].长安大学学报(自然科学版),2012,32(01):0.
[4]尚维波,张春宁.高墩刚构桥系梁抗震分析[J].长安大学学报(自然科学版),2012,32(01):0.
[5]邬晓光,李冀弘,宋伟伟.基于改进响应面法的在役PC桥梁承载力可靠性[J].长安大学学报(自然科学版),2012,32(03):53.
　WU Xiao-guang,LI Ji-hong,SONG Wei-wei.Reliability of existing PC bridge based on improved response surface method[J].Journal of Chang’an University (Natural Science Edition),2012,32(03):53.
[6]石雄伟,袁卓亚,马毓泉,等.钢板-混凝土组合加固预应力混凝土箱梁[J].长安大学学报(自然科学版),2012,32(03):58.
　SHI Xiong-wei,YUAN Zhuo-ya,MA Yu-quan,et al.Prestressed concrete box girder strengthened with comsposition of steel plate and concrete[J].Journal of Chang’an University (Natural Science Edition),2012,32(03):58.
[7]李传习,陶 伟,董创文.斜交墩截面刚度与弯曲正应力[J].长安大学学报(自然科学版),2012,32(03):63.
　LI Chuan-xi,TAO Wei,DONG Chuang-wen.Sectional stiffness and bending normal stress of oblique pier[J].Journal of Chang’an University (Natural Science Edition),2012,32(03):63.
[8]邓继华,邵旭东.带铰平面梁元几何非线性有限元分析[J].长安大学学报(自然科学版),2012,32(03):68.
　DENG Ji-hua,SHAO Xu-dong.Geometric nonlinear finite element analysis of plane beam element with hinge[J].Journal of Chang’an University (Natural Science Edition),2012,32(03):68.
[9]蒲广宁,赵 煜,宋一凡.减梁增肋法加固空心板桥的力学性能[J].长安大学学报(自然科学版),2012,32(06):38.
　PU Guang-ning,ZHAO Yu,SONG Yi-fan.Mechanical properties of strengthening hollow slab bridge based on beam-reduction and rib-addition method[J].Journal of Chang’an University (Natural Science Edition),2012,32(03):38.
[10]党 栋,贺拴海,周勇军,等.基于车辆统计数据的汽车荷载标准值取值与评估[J].长安大学学报(自然科学版),2012,32(06):44.
　DANG Dong,HE Shuan-hai,ZHOU Yong-jun,et al.Choosing and assessment for the standard of vehicle load based on vehicle statistical data[J].Journal of Chang’an University (Natural Science Edition),2012,32(03):44.

更新日期/Last Update: 2019-05-23