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A large area of tensile stress in the middle and lower part of the upstream of a stone-masonry arch dam exceeds the standard and needs to be strengthened. Based on two local reinforcement schemes of a masonry dam, the contact element was used to simulate the joint characteristics of the new and old dam bodies, and the stress and deformation characteristics of the joint surface under five standard working conditions were analyzed. The results show that after reinforcement, the opening and loading characteristics of the joints of the two schemes are similar, and the side pier of the rib pier scheme has asymmetrical opening and loading phenomenon. Under the condition of high water level, the reinforced structure mainly supports the load at the upper part, and the stress at the lower part is small and may open. Under the condition of low water level, the stress level of the joint surface is low and the reinforced structure does not bear the load. Under the condition of temperature drop after reinforcement, the masonry dam body rotates and deforms with the upper part of the reinforced structure as the fulcrum, and the joint surface will open in a large area under the condition of low water level. Under the condition of temperature rise, the dam body shifts upstream when the water level is low, resulting in a symmetrical and smooth parabolic clearance distribution on the horizontal direction.

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针对某砌石拱坝上游坝面中下部存在大面积拉应力超标现象,基于该砌石坝加固工程中的两种坝后局部加固方案,采用接触单元模拟新老坝体结合面的连接特性,分析了规范中五种工况下结合面的受力特性及变形特性。研究表明,加固后,两种方案结合面的张开特性和受力特性在整体上相似,其中肋墩方案中边墩存在不对称张开及受力现象;高水位工况下加固结构主要在上部承力,下部应力较小并可能张开;低水位工况下结合面应力水平较低,加固结构基本不承受荷载;加固后温降工况下,砌石坝体以加固结构上部为支点进行转动变形,在低水位条件下结合面会出现大面积张开;温升工况下,低水位时坝体向上游变位,导致结合面间隙分布在水平方向上呈对称光滑的抛物线形分布。

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徐立君(1979-),女,副教授,研究方向为水工结构,E-mail:

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徐立君(1979-),女,副教授,研究方向为水工结构,E-mail:

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徐立君(1979-),女,副教授,研究方向为水工结构,E-mail:

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砌石拱坝坝后加固结合面力学特性研究
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徐立君 1 , 邓宇轩 2
水电能源科学 | 大坝安全与监测 2023,41(1): 92-95
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水电能源科学 | 大坝安全与监测 2023, 41(1): 92-95
砌石拱坝坝后加固结合面力学特性研究
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徐立君1 , 邓宇轩2
作者信息
  • 1.湖南水利水电职业技术学院,湖南 长沙 410131
  • 2.中铁第四勘察设计院集团有限公司,湖北 武汉 441108
  • 徐立君(1979-),女,副教授,研究方向为水工结构,E-mail:

Study on Mechanical Properties of Joint Surface After Masonry Arch Dam Reinforcement
Li-jun XU1 , Yu-xuan DENG2
Affiliations
  • 1.Hunan Polytechnic of Water Resources and Electric Power, Changsha 410131, China
  • 2.China Railway Siyuan Survey and Design Group Co., LTD., Wuhan 441108, China
出版时间: 2023-01-25 doi: 10.20040/j.cnki.1000-7709.2023.20221487
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针对某砌石拱坝上游坝面中下部存在大面积拉应力超标现象,基于该砌石坝加固工程中的两种坝后局部加固方案,采用接触单元模拟新老坝体结合面的连接特性,分析了规范中五种工况下结合面的受力特性及变形特性。研究表明,加固后,两种方案结合面的张开特性和受力特性在整体上相似,其中肋墩方案中边墩存在不对称张开及受力现象;高水位工况下加固结构主要在上部承力,下部应力较小并可能张开;低水位工况下结合面应力水平较低,加固结构基本不承受荷载;加固后温降工况下,砌石坝体以加固结构上部为支点进行转动变形,在低水位条件下结合面会出现大面积张开;温升工况下,低水位时坝体向上游变位,导致结合面间隙分布在水平方向上呈对称光滑的抛物线形分布。

砌石拱坝  /  培厚方案  /  肋墩方案  /  结合面特性

A large area of tensile stress in the middle and lower part of the upstream of a stone-masonry arch dam exceeds the standard and needs to be strengthened. Based on two local reinforcement schemes of a masonry dam, the contact element was used to simulate the joint characteristics of the new and old dam bodies, and the stress and deformation characteristics of the joint surface under five standard working conditions were analyzed. The results show that after reinforcement, the opening and loading characteristics of the joints of the two schemes are similar, and the side pier of the rib pier scheme has asymmetrical opening and loading phenomenon. Under the condition of high water level, the reinforced structure mainly supports the load at the upper part, and the stress at the lower part is small and may open. Under the condition of low water level, the stress level of the joint surface is low and the reinforced structure does not bear the load. Under the condition of temperature drop after reinforcement, the masonry dam body rotates and deforms with the upper part of the reinforced structure as the fulcrum, and the joint surface will open in a large area under the condition of low water level. Under the condition of temperature rise, the dam body shifts upstream when the water level is low, resulting in a symmetrical and smooth parabolic clearance distribution on the horizontal direction.

masonry arch dam  /  culture thick solution  /  buttress scheme  /  interface characteristic
徐立君, 邓宇轩. 砌石拱坝坝后加固结合面力学特性研究. 水电能源科学, 2023 , 41 (1) : 92 -95 . DOI: 10.20040/j.cnki.1000-7709.2023.20221487
Li-jun XU, Yu-xuan DENG. Study on Mechanical Properties of Joint Surface After Masonry Arch Dam Reinforcement[J]. Water Resources and Power, 2023 , 41 (1) : 92 -95 . DOI: 10.20040/j.cnki.1000-7709.2023.20221487
2023年第41卷第1期
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doi: 10.20040/j.cnki.1000-7709.2023.20221487
  • 接收时间:2022-06-19
  • 首发时间:2026-01-28
  • 出版时间:2023-01-25
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  • 收稿日期:2022-06-19
  • 修回日期:2022-08-05
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    1.湖南水利水电职业技术学院,湖南 长沙 410131
    2.中铁第四勘察设计院集团有限公司,湖北 武汉 441108
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2种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)

Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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