加筋路堤下涵洞土压力分布规律及计算方法

doi:10.6040/j.issn.1672-3961.0.2021.125

摘要/Abstract

摘要：

基于缩尺模拟试验, 通过改变涵洞两侧地基压缩模量用于模拟堤-涵差异沉降, 揭示涵顶加筋作用机理, 确定路堤堆载条件下涵顶土压力分布规律, 并推导建立土压力计算公式。研究结果表明: 同等地基模量条件下, 加筋路堤下的涵顶土压力明显高于普通路堤, 且随格栅层数增加, 堤-涵相对位移减少; 同等加筋条件下, 地基压缩模量越小, 堤-涵相对位移及涵顶土压力均越大; 综合土拱效应与加筋作用机理, 建立加筋路堤下涵顶土压力计算公式, 并与模型试验结果进行可靠性验证。研究结果可为加筋路堤下涵洞结构设计提供依据。

关键词: 刚性涵洞, 加筋路堤, 室内模型试验, 土压力

Abstract:

Based on the scale model test, the difference settlement between the embankment and the culvert was simulated by changing the foundation compression modulus on both sides of the culvert to reveal the mechanism of reinforcement and subsidence reduction on the culvert roof, determine the distribution law of earth pressure on the culvert roof under the condition of embankment overloading, and deduce and establish the calculation formula of earth pressure.The results showed that the soil pressure at the top of the reinforced embankment was obviously higher than that of the ordinary embankment under the same foundation modulus. The embankment-culvert relative displacement decreased with the increase of the number of grid layers.Under the same reinforcement condition, the smaller the foundation compression modulus was, the higher the embankment-culvert relative displacement and the soil pressure on the culvert top would be.Combined with the soil arching effect and the mechanism of reinforcement and subsidence reduction, the calculation formula of earth pressure under the roof of reinforced embankment was established, and the reliability was verified with the model test results.

Key words: rigid culvert, reinforced embankment, laboratory model test, soil pressure

中图分类号:

TU443

宋修广,赵一民,张宏博,杨振宇,杨强. 加筋路堤下涵洞土压力分布规律及计算方法[J]. 山东大学学报 (工学版), 2021, 51(4): 43-53.

Xiuguang SONG,Yimin ZHAO,Hongbo ZHANG,Zhenyu YANG,Qiang YANG. Distribution law and calculation method of earth pressure in culvert under reinforced embankment[J]. Journal of Shandong University(Engineering Science), 2021, 51(4): 43-53.

图/表 16

图1

图2

图3

表1

图4

表2

表3

图5

图6

图7

图8

图9

图10

图11

图12

图13

参考文献 25

1	SONG Dingbao , CHEN Baoguo , KHAN A . Analytical solution of the vertical earth pressure on load-shedding culvert under high fill[J]. Computers and Geotechnics, 2020, 122, 103495. doi: 10.1016/j.compgeo.2020.103495
2	邓谦. 山区公路涵洞受力特性及加筋减载计算研究[D]. 武汉: 湖北工业大学, 2019.
	DENG Qian. Study on the stress characteristics of highway culvert and calculation of reinforcement load reduction in mountain areas[D]. Wuhan: Hubei University of Technology, 2019.
3	宋丁豹, 蒲诃夫, 陈保国, 等. 高填方减载式刚性涵洞受力特性模型试验研究[J]. 岩土力学, 2020, 41 (3): 823- 830.
	SONG Dingbao , PU KHOV , CHEN Baoguo , et al. Earth pressure calculation method of rigid culverts under load reduction condition[J]. Rock and Soil Mechanics, 2020, 41 (3): 823- 830.
4	谢永利, 冯忠居, 李少杰, 等. 基于沉降控制的高路堤涵洞纵向调荷技术[J]. 岩土工程学报, 2019, 41 (10): 1790- 1799.
	XIE Yongli , FENG Zhongju , LI Shaojie , et al. Longitudinal load adjustment technology for high embankment culverts based on settlement control[J]. Chinese Journal of Geotechnical Engineering, 2019, 41 (10): 1790- 1799.
5	张业勤, 陈保国, 孟庆达, 等. 减载条件下高填方涵洞受力机制及基底压力[J]. 岩土力学, 2019, 40 (12): 4813- 4818.
	ZHANG Yeqin , CHEN Baoguo , MENG Qingda , et al. Earth pressure calculation method of rigid culverts under load reduction condition[J]. Rock and Soil Mechanics, 2019, 40 (12): 4813- 4818.
6	MA Qiang , KU Zhun , XIAO Henglin . Model tests of earth pressure on buried rigid pipes and flexible pipes underneath expanded polystyrene (EPS)[J]. Advances in Civil Engineering, 2019, 13
7	陈保国, 宋丁豹, 焦俊杰, 等. 减载条件下高填方涵洞垂直土压力研究[J]. 华中科技大学学报(自然科学版), 2015, 43 (10): 112- 116.
	CHEN Baoguo , SONG Dingbao , JIAO JunJie , et al. Vertical earth pressure on high fill culverts under load reduction condition[J]. Journal of Huazhong University of Science and Technology(Natural Science Edition), 2015, 43 (10): 112- 116.
8	陈保国, 宋丁豹, 王云辉, 等. 减载式刚性涵洞减载机理与受力特性研究[J]. 华中科技大学学报(自然科学版), 2016, 44 (4): 79- 84.
	CHEN Baoguo , SONG Dingbao , WANG Yunhui , et al. Load reduction mechanism and stress characteristics of load-shedding culvert under high fill[J]. Journal of Huazhong University of Science and Technology(Natural Science Edition), 2016, 44 (4): 79- 84.
9	杨锡武, 张永兴. 山区公路高填方涵洞的成拱效应及土压力计算理论研究[J]. 岩石力学与工程学报, 2005, (21): 89- 95.
	YANG Xiwu , ZHANG Yongxing . Study on arch action and earth pressure theory for culverts under high embankment[J]. Chinese Journal of Rock Mechanics and Engineering, 2005, (21): 89- 95.
10	李盛, 卓彬, 王起才, 等. 高填方黄土明洞顶EPS板和土工格栅共同减载计算及土拱效应分析[J]. 中国铁道科学, 2018, 39 (1): 16- 22. doi: 10.3969/j.issn.1001-4632.2018.01.03
	LI Sheng , ZHUO Bin , WANG Qicai , et al. Load reduction calculation and soil arch effect analysis for high fIll open cut tunnel in loess area under joint action of EPS and reogrid[J]. China Railway Science, 2018, 39 (1): 16- 22. doi: 10.3969/j.issn.1001-4632.2018.01.03
11	马强, 郑俊杰, 张军. 高填方涵洞加筋减载的现场试验研究[J]. 岩土力学, 2012, 33 (8): 2337- 2342. doi: 10.3969/j.issn.1000-7598.2012.08.016
	MA Qiang , ZHENG Junjie , ZHANG Jun . Experimental study of high embankment culvert treated by imperfect ditch covered with a geogrid layer[J]. Rock and Soil Mechanics, 2012, 33 (8): 2337- 2342. doi: 10.3969/j.issn.1000-7598.2012.08.016
12	杨锡武. 山区公路高填方涵洞土压力理论及加筋减载研究[D]. 重庆: 重庆大学, 2004.
	YANG Xiwu. Research on the earth pressure theory and reinforcement load reduction for the culverts beneath high fill[D]. Chongqing: Chongqing University, 2004.
13	MARSTON A , ANDERSON A O . The theory of loads on pipe in ditches and tests of cement and clay drain tile and sewer pipe[J]. Iowa, USA: Iowa State College of Agriculture and Mechanic Arts, 1913,
14	CHEN Baoguo , ZHENG Junjie , HAN Jie . Experimental study and numerical simulation on concrete box culverts in trenches[J]. Journal of Performance of Constructed Facilities, 2010, 24 (3): 223- 234. doi: 10.1061/(ASCE)CF.1943-5509.0000098
15	HAN Jie , WANG Fei , Al-NADDAF M , et al. Progressive development of two-dimensional soil arching with displacement[J]. International Journal of Geom-echanics, 2017, 17 (12): 04017112. doi: 10.1061/(ASCE)GM.1943-5622.0001025
16	AHMED M R , TRAN V D H , MEGUID M A . On the role of geogrid reinforcement in reducing earth pressure on buried pipes: experimental and numerical inve-stigations[J]. Soils and Foundations, 2015, 55 (3): 588- 599. doi: 10.1016/j.sandf.2015.04.010
17	COREY R , HAN Jie , KHATRI D K , et al. Laboratory study on geosynthetic protection of buried steel-reinforced HDPE pipes from static loading[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2014, 140 (6): 04014019. doi: 10.1061/(ASCE)GT.1943-5606.0001113
18	Al-NADDAF M , HAN Jie , XU Chao , et al. Effect of geofoam on vertical stress distribution on buried structures subjected to static and cyclic footing loads[J]. Journal of Pipeline Systems Engineering and Practice, 2019, 10 (1): 04018027. doi: 10.1061/(ASCE)PS.1949-1204.0000355
19	BARTLETT S F , LINGWALL B N , Vaslestad J . Methods of protecting buried pipelines and culverts in transportation infrastructure using EPS geofoam[J]. Geotextiles and Geomembranes, 2015, 43 (5): 450- 461. doi: 10.1016/j.geotexmem.2015.04.019
20	SANJAY Kumar Shukla , ASCE M . Load coefficient for ditch conduits covered with geosynthetic-reinforced granular backfill[J]. International Journal of Geomechanics, 2013, 13 (1): 76- 82. doi: 10.1061/(ASCE)GM.1943-5622.0000181
21	HANDY R L . Anatomy of an error[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2004, 130 (7): 768- 771. doi: 10.1061/(ASCE)1090-0241(2004)130:7(768)
22	HANDY R L . Geotechnical engineering: soil and foundation principles and practice[M]. New York, USA: McGraw-Hill Education, 2007.
23	GIROUD J P . Determination of geosynthetic strain due to deflection[J]. Geosynthetics International, 1995, 2 (3): 635- 641. doi: 10.1680/gein.2.0028
24	SHUKLA S , GANRAV , SIVAKUGAN N . A simplified extension of the conventional theory of arching in soils[J]. International Journal of Geotechnical Engineering, 2009, 3 (3): 353- 359. doi: 10.3328/IJGE.2009.03.03.353-359
25	SHUKLA S K , SIVAGUKAN N . A general expression for geosynthetic strain due to deflection[J]. Geosynthetics International, 2009, 16 (5): 402- 407. doi: 10.1680/gein.2009.16.5.402

多维度评价

Viewed

Full text

Abstract

Cited

Shared

Discussed

D₁₀/mm	D₃₀/mm	D₅₀/mm	D₆₀/mm	C_u	C_c	ρ_dmax/(g·cm^-3)	ρ_dmin/(g·cm^-3)
0.16	0.31	0.41	0.46	2.83	1.28	1.72	1.42

单位长度纵向拉伸屈服强度/(kN·m^-1)	单位长度横向拉伸屈服强度/(kN·m^-1)	纵向屈服伸长率/%	纵向屈服伸长率/%	网孔面积/mm²
25.2	55	25.2	12	1400

工况	格栅层数	海绵类型
1	0	无
2	0
3	1	55D海绵
4	2
5	0
6	1	45D海绵
7	2
8	0
9	1	25D海绵
10	2

[1]	李连祥,王雷,赵永新,季相凯. 考虑支护结构作用的地下管廊真实受力模型[J]. 山东大学学报 (工学版), 2021, 51(1): 60-68.
[2]	江健宏,杨振宇,陈奇,孟庆宇,张宏博. 预应力对拉式挡土墙受力特征模型试验研究[J]. 山东大学学报 (工学版), 2019, 49(4): 61-69.
[3]	李连祥,刘兵,成晓阳. 基坑支护桩永久存在对地下室外墙土压力分布的影响[J]. 山东大学学报(工学版), 2018, 48(2): 30-38.
[4]	张宏博,解全一,岳红亚,崔琦,孙润生,王珂. 预应力悬锚式挡土墙受力特性[J]. 山东大学学报(工学版), 2016, 46(5): 95-101.