Research on Hydrodynamic Pressure Spreading in the Base Gap of the Inverted Arch Plunge Cushion Pool by the Uplift Pressure

Zhang Chuncai; Sun Jian

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Research on Hydrodynamic Pressure Spreading in the Base Gap of the Inverted Arch Plunge Cushion Pool by the Uplift Pressure

更新时间：2023-11-14

- Research on Hydrodynamic Pressure Spreading in the Base Gap of the Inverted Arch Plunge Cushion Pool by the Uplift Pressure
- Advanced Engineering Sciences Vol. 44, Issue Z1, Pages: 26-31(2012)
- 作者机构：
  
  1. 长沙理工大学
  2. 西安理工大学
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2012，
  
  Published Online：20 January 2012，
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张春财,孙建.扬压力作用下反拱水垫塘缝隙动水压力研究[J].工程科学与技术,2012,44(Z1):26-31.

Zhang Chuncai, Sun Jian. Research on Hydrodynamic Pressure Spreading in the Base Gap of the Inverted Arch Plunge Cushion Pool by the Uplift Pressure. [J]. Advanced Engineering Sciences 44(Z1):26-31(2012)
张春财,孙建.扬压力作用下反拱水垫塘缝隙动水压力研究[J].工程科学与技术,2012,44(Z1):26-31. DOI：

Zhang Chuncai, Sun Jian. Research on Hydrodynamic Pressure Spreading in the Base Gap of the Inverted Arch Plunge Cushion Pool by the Uplift Pressure. [J]. Advanced Engineering Sciences 44(Z1):26-31(2012) DOI：

摘要

中文摘要: 以国内某高坝工程为参照，对水垫塘排水和底板锚固措施都失效后，底板缝隙动水压力随扬压力、底板缝宽以及不同止水破坏程度这三个关键因素的变化规律进行了理论分析和试验研究。研究表明，止水正常时，由于底板表面动水压力脉动、底板振动，使缝隙动水压力大于扬压力；止水破坏后在小扬压力范围内，缝隙动水压力增大，但增幅随扬压力增大而减小、也随底板缝宽增加、或止水破坏程度增加而减小；止水破坏后在大扬压力范围，缝隙动水压力减小，但减幅随扬压力增大而增大，也随底板缝宽增加、或止水破坏程度增加而减小。分析了水工规范中底板块安全系数的不妥之处，建议用缝隙动水压力代替扬压力准确计算底板块安全系数。工程中应尽可能做好排水措施，确保水垫塘排水设施正常运行。

Abstract

Abstract:By referring to a high dam project under construction in process

the experimental investigation and theoretical analysis on the variation of hydrodynamic pressure spreading in the base gap with uplift pressure

widths of the contraction joints between slabs and varied destructive degrees of water seal installation has been conducted by considered that any water seal installation between slabs and anchoring on them were all out of function. The study results showed that hydrodynamic pressure spreading in the base gap was larger than uplift pressure when water seal installation was normal. When water sealing was destroyed

hydrodynamic pressure spreading in the base gap increases

but the growth was higher with increase of the value of uplift pressure

and lower with increase of widths of the contraction joints between slabs and destructive degrees of water seal installation within the smaller uplift pressure. When water sealing was destroyed

hydrodynamic pressure spreading in the base gap decreased

but the reduction was higher with increase of the value of uplift pressure

and lower with increase of widths of the contraction joints between slabs and destructive degrees of water seal damaged within the larger uplift pressure. Unreasonable point of the slab safety factor calculated by hydraulic design specification has been analyzed

and uplift pressure was proposed to replace by hydrodynamic pressure spreading in the base gap through analyzing safety factor of slabs in the specification. Drainage measures should be done well in order to ensure normal operation of plunge pool’s drainage system.

关键词

反拱水垫塘底板缝隙动水压力扬压力底板缝宽止水不同破坏程度

Keywords

inverted-arch poolhydrodynamic pressure spreading in the base gapuplift pressurewidths of the contraction joints between slabsvaried destructive degrees of water seal installation

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四川大学水利水电学院四川

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