| 易放辉,黄圣平,张 聪,邹开明.复杂环境下改建船闸高陡边坡组合支护技术[J].水运工程,2025,(2):225-231 |
| 复杂环境下改建船闸高陡边坡组合支护技术 |
| Combined supporting technology for high and steep slope of modified ship lock under complex environment |
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| DOI： |
| 中文关键词: 改建船闸 高陡边坡 “框格梁+预应力锚索”组合支护 边坡楔形体 |
| 英文关键词:renovation of ship lock high and steep slope “frame beam+prestressed anchor cable” combined support slope wedge shape |
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| 中文摘要: |
| 受制于地形地貌、地质条件、结构施工以及地基防渗等因素，我国中东部地区内河船闸施工条件复杂，而此复杂条件下改建船闸高陡边坡支护技术研究成果较少。依托湖南省首个在建27 m高水头差洪江枢纽改建船闸工程，针对复杂环境下船闸施工面临的高边坡施工稳定性难题，提出“框格梁+预应力锚索”组合支护技术，并通过坡面沉降变形、锚索内力现场测试手段分析高边坡安全稳定性，评价该防护技术应用效果。研究结果表明：现场采用该支护技术后，船闸高边坡坡面沉降变形日均最大值为0.34 mm/d，累计沉降最大值8.3 mm，远小于日均3 mm/d、累计沉降值20 mm的报警值；“框格梁+预应力锚索”组合支护结构主要承受拉力作用且数值较小，最大拉力小于1 000 kN的设计限值，船闸高边坡支护结构设计布局合理，抑制边坡楔形体滑移效果良好，高边坡处于安全稳定状态。研究成果可为类似工程提供借鉴。 |
| 英文摘要: |
| The construction of China’s inland river locks in the central and eastern regions is a complex process due to factors such as topography,geological conditions,structural construction,and foundation seepage control.However,there is limited research on high steep slope support technology for locks rebuilt under these complex conditions.This paper focuses on the reconstruction of the Hongjiang hub lock project in Hunan province,which has a 27 m high head difference.It proposes a combination of support technology,namely “frame lattice beam + prestressed anchor cable,”to address the stability issues faced during high slope construction in a complex environment.The safety and stability of the high slope are analyzed through the deformation of the slope surface settlement and on-site testing of the anchor cable’s internal force.The effectiveness of the protection technology is evaluated.The research findings demonstrate that after the adoption of the support technology,the maximum daily settlement deformation of the high slope of the lock is 0.34 mm/d,and the maximum cumulative settlement is 8.3 mm,which is far less than the alarm value of 3 mm/d and 20 mm.The “frame lattice beam + prestressed anchorcable” combination primarily bears tensile force,which remains within the design limit of 1,000 kN.The support structure’s design layout for the high slope of the lock is reasonable,effectively preventing slope wedge slippage and ensuring the high slope’s safety and stability.The research results can provide reference for similar projects. |
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