组合工字型护岸稳定性室内模型试验研究
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摘要
组合式砌块护岸因其施工便利、性能良好等优点在国内被逐渐推广,但其性能研究及相关设计规范还处于空白阶段。为探究组合工字型护岸抗滑性能与抗倾覆性能,进行了三组不同齿坎长度条件下的抗滑动模型试验和三组不同工况下的护岸抗倾覆模型试验,试验结果表明,在试验齿长范围内,抗滑力与齿长近似呈线性关系。随着齿长增加,极限抗滑力和综合摩擦系数相应增大,齿前被动土压力值较朗肯土压力理论计算值折减系数在0. 7左右。铺设砂浆及锚筋情况下护岸整体性较好,抗倾覆能力较强。
The combined block revetment has been gradually promoted in China due to its convenient construction and good performance,but its performance research and related design specifications are still in a blank stage.In order to explore the anti-sliding performance and anti-overturning performance of the combined I-type revetment,three sets of anti-sliding model tests under different tooth lengths and three sets of revetment anti-overturning model tests under different working conditions were carried out. The test results show that the test In the range of tooth length,the anti-sliding force is approximately linear with the tooth length. As the tooth length increases,the ultimate anti-sliding force and the comprehensive friction coefficient increase correspondingly. The passive earth pressure value before the tooth is lower than the theoretical calculation value of the Rankine earth pressure by about 0. 7. Under the condition of laying mortar and anchorage,the bank protection is better and the anti-overturning ability is higher.
The combined block revetment has been gradually promoted in China due to its convenient construction and good performance,but its performance research and related design specifications are still in a blank stage.In order to explore the anti-sliding performance and anti-overturning performance of the combined I-type revetment,three sets of anti-sliding model tests under different tooth lengths and three sets of revetment anti-overturning model tests under different working conditions were carried out. The test results show that the test In the range of tooth length,the anti-sliding force is approximately linear with the tooth length. As the tooth length increases,the ultimate anti-sliding force and the comprehensive friction coefficient increase correspondingly. The passive earth pressure value before the tooth is lower than the theoretical calculation value of the Rankine earth pressure by about 0. 7. Under the condition of laying mortar and anchorage,the bank protection is better and the anti-overturning ability is higher.
引文
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16窦国涛,夏军武,于文杰,等.基于扰动度平移模式刚性挡墙被动土压力研究[J].科学技术与工程,2016,16(24):79-86Dou Guotao,Xia Junwu,Yu Wenjie,et al.Study on passive earth pressure against the rigid wall under T mode based on disturbed degree[J].Science Technology and Engineering,2016,16(24):79-86
17谢晓鹏,窦国涛,曹正浩,等.采动区墙体转动模式下非极限被动土压力试验研究[J].科学技术与工程,2018,18(25):216-223Xie Xiaopeng,Dou Guotao,Cao Zhenghao,et al.Experimental study on the non-limit state passive earth pressure under RB mode within mining subsidence areas[J].Science Technology and Engineering,2018,18(25):216-223
18宋修广,吴建清,张宏博,等.压力分散型挡土墙土压力分布规律分析[J].科学技术与工程,2014,14(20):106-110Song Xiuguang,Wu Jianqing,Zhang Hongbo,et al.Analysis on earth pressure distribution of dispersed pressure retaining wall[J].Science Technology and Engineering,2014,14(20):106-110
2刘厚昌,俞晓冬.传统护岸与生态护岸的比较与展望[J].现代交通技术,2011,8(增刊1):78-81Liu Houchang,Yu Xiaodong.Comparison and prospect of traditional revetment and ecological revetment[J].Modern Transportation Technology,2011,8(S1):78-81
3陈妙福,褚明生.内河航道齿坎式护岸结构分析及应用[J].水道港口,2006,27(6):368-372Chen Miaofu,Chu Mingsheng.Analysis and application of riverbank protection structure with notched sill in inland waterway[J].Journal of Waterway and Harbor,2006,27(6):368-372
4饶志红,许雷,林正纯.组合型水泥土挡墙的弹塑性有限元分析[J].地下空间与工程学报,2010,6(2):266-269Rao Zhihong,Xu Lei,Lin Zhengchun.Elastic-plastic FEM analysis on the composite support structure of cement-soil gravity retaining wall[J].Chinese Journal of Underground Space and Engineering,2010,6(2):266-269
5 Chaney R C,Demars K R,Lee K,et al.Retaining wall model test with waste foundry sand mixture backfill[J].Geotechnical Testing Journal,2001,24(4):401-408
6 Chughashok K,Labuzjoseph F.Numerical simulation of an instrumented cantilever retaining wall[J].Canadian Geotechnical Journal,2015,48(9):1303-1313
7屠毓敏,俞亚南.齿坎抗滑作用的模型试验研究[J].水利学报,2000,31(12):68-71Tu Yumin,Yu Yanan.Model test for sliding resistence of tenon[J].Journal of Hydraulic Engineering,2000,31(12):68-71
8屠毓敏,俞亚南.齿坎式护岸结构抗滑稳定性分析[J].土木工程学报,2000,33(5):97-99Tu Yumin,Yu Yanan.Analysis of sliding resistance stability of bank revetment with key-wall[J].China Civil Engineering Journal,2000,33(5):97-99
9俞亚南,高庆丰.齿坎式挡土结构抗滑稳定性分析[J].浙江大学学报(工学版),2003,37(6):652-656Yu Yanan,Gao Qingfeng.Numerical analysis for stabil ity against sliding of retaining wall with notched sill[J].Journal of Zhejiang University(Engineering Science),2003,37(6):652-656
10阮长青,屠毓敏,俞亚南.齿坎式挡土结构物极限抗滑力研究[J].岩土力学,2010,31(8):2514-2518Ruan Changqing,Tu Yumin,Yu Yanan.Study of limit sliding resistance force on retaining structure with tenon[J].Rock and Soil Mechanics,2010,31(8):2514-2518
11葛娟.齿坎式挡墙的极限平衡理论分析[J].苏州大学学报(自然科学版),2001,17(2):58-61Ge Juan.Analysis of retaining wall with notched sill with limit equilibrium theory[J].Journal of Soochow University(Natural Science Edition),2001,17(2):58-61
12刘金龙,陈陆望,王吉利.软弱地基上齿坎式挡土结构物抗滑特征分析[J].西北农林科技大学学报(自然科学版),2012,40(6):224-229Liu Jinlong,Chen Luwang,Wang Jili.Character of retaining structure with tenon on weak foundation[J].Journal of Northwest A&FUniversity(Natural Science Edition),2012,40(6):224-229
13胡玉银.挡土墙抗倾覆稳定性分析[J].同济大学学报(自然科学版),1995,23(3):321-325.Hu Yuyin.Analysis of overturning stability of retaining wall[J].Journal of Tongji University(Natural Science),1995,23(3):321-325
14黄太华,饶英明,谭萍.关于挡土墙的地基承载力验算及抗倾覆稳定性验算方法的探讨[J].岩土工程技术,2003,17(6):315-318Huang Taihua,Rao Yingming,Tan Ping.Study on the method of checking computation for retaining wall's ground bearing capacity and the anti-overturning stability[J].Geotechnical Engineering Technique,2003,17(6):315-318
15黄岳文.关于挡土墙抗倾覆稳定分析的讨论[J].岩土工程学报,2015,37(6):1158-1164Huang Yuewen.Overturning stability of retaining walls[J].Chinese Journal of Geotechnical Engineering,2015,37(6):1158-1164
16窦国涛,夏军武,于文杰,等.基于扰动度平移模式刚性挡墙被动土压力研究[J].科学技术与工程,2016,16(24):79-86Dou Guotao,Xia Junwu,Yu Wenjie,et al.Study on passive earth pressure against the rigid wall under T mode based on disturbed degree[J].Science Technology and Engineering,2016,16(24):79-86
17谢晓鹏,窦国涛,曹正浩,等.采动区墙体转动模式下非极限被动土压力试验研究[J].科学技术与工程,2018,18(25):216-223Xie Xiaopeng,Dou Guotao,Cao Zhenghao,et al.Experimental study on the non-limit state passive earth pressure under RB mode within mining subsidence areas[J].Science Technology and Engineering,2018,18(25):216-223
18宋修广,吴建清,张宏博,等.压力分散型挡土墙土压力分布规律分析[J].科学技术与工程,2014,14(20):106-110Song Xiuguang,Wu Jianqing,Zhang Hongbo,et al.Analysis on earth pressure distribution of dispersed pressure retaining wall[J].Science Technology and Engineering,2014,14(20):106-110