| 吴维江,汪小刚,刘学山,英鹏涛,邵明磊,张强.含诱导缝钢筋混凝土衬砌压力隧洞物理模型试验研究[J].水利学报,2025,56(11):1469-1479 |
| 含诱导缝钢筋混凝土衬砌压力隧洞物理模型试验研究 |
| Experimental study on physical model of reinforced concrete lined pressure tunnel with inducing joints |
| 投稿时间：2024-12-23 修订日期：2025-11-14 |
| DOI：10.13243/j.cnki.slxb.20240842 |
| 中文关键词: 抽水蓄能电站 压力隧洞 含诱导缝钢筋混凝土衬砌 物理模型试验 |
| 英文关键词: pumped storage power stations pressure tunnel reinforced concrete lining with inducing joints physical model testing |
| 基金项目:国家电网公司总部科技项目（5200-202455105A-1-1-ZN）；国家自然科学基金面上项目（52179121）；中国水利水电科学研究院基本科研业务费专项（GE0145B012021） |
|
| 摘要点击次数: 25 |
| 全文下载次数: 21 |
| 中文摘要: |
| 钢筋混凝土衬砌是压力隧洞一种优选的衬砌结构型式，在高水头下可能发生开裂，但其开裂位置和开裂数量具有随机性，且难以进行有效监测和控制，对隧洞长期安全服役会产生不确定性影响。针对传统钢筋混凝土衬砌存在的不足，提出了含诱导缝钢筋混凝土衬砌结构，使被动开裂转为主动开裂。通过开展新型衬砌压力隧洞充排水物理模型试验，分析了首次和第二次充排水过程中衬砌结构的受力性状，并验证新型衬砌结构的有效性。试验结果表明：首次充水过程中，当衬砌开裂后，衬砌外侧水压力出现快速上升，且随着衬砌内外侧水压力差的逐渐减小并趋于平衡，衬砌（环向）和钢筋受力开始由受拉状态转为受压状态；而在第二次充排水过程中，衬砌内外水连通，且两者同步升降，衬砌环向受力初期表现为短暂的受拉，后逐渐受压；首次和第二次充水后，含诱导缝的钢筋混凝土衬砌仅沿诱导缝形成了1条贯通裂缝，其他部位未出现裂缝。模型试验结果证实了含诱导缝钢筋混凝土衬砌可以实现开裂位置可控、裂缝宽度可测、钢筋可靶向防腐的功能，克服了传统钢筋混凝土衬砌存在的不足，可为高水头压力隧洞钢筋混凝土透水衬砌设计提供新的思路。 |
| 英文摘要: |
| Reinforced concrete lining is a preferred lining structure type for pressure tunnels，which may experience cracking under high hydraulic heads. However，the location and number of cracks are random，making effective monitoring and control difficult and introducing uncertainty during the long-term safe operation of the tunnel. To overcome the shortcomings of traditional reinforced concrete linings，a new structure of reinforced concrete lining with inducing joints has been proposed，transforming passive cracking into active cracking. Through conducting physical model tests on the water filling and emptying of pressure tunnels with the new lining structure，the stress characteristics of the lining structure during the first and second filling and draining processes have been analyzed，thereby validating the effectiveness of the new lining structure. The test results indicate that during the initial water filling process，after the lining cracks，the water pressure on the outside of the lining experiences a rapid increase. As the pressure difference between inside and outside of the lining gradually decreases and approaches equilibrium，the lining and the reinforcement transition from a tensile state to a compressive state circumferentially. In the second filling and emptying process，the water inside and outside of the lining are connected，with water pressure rising and falling synchronously. The initial circumferential stress of the lining shows a transient tension and then a gradual compression state. After the first and second water fillings，the reinforced concrete lining with a inducing joint had only one through-crack along the inducing joint，with no cracks in other areas. The results of the model tests confirmed that the reinforced concrete lining containing inducing joints can achieve controllable crack locations，measurable crack widths，and targeted corrosion prevention for the reinforcement，overcoming the shortcomings of traditional reinforced concrete linings and providing new ideas for the design of permeable reinforced concrete linings in high-head pressure tunnels. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |