盾构隧道管片接缝内外双道密封垫防水性能试验研究
Experimental Study on Waterproof Performance of Double-Sealing Gaskets at Segmental Joints of Shield Tunnels
张稳军 1周鑫南 2张高乐 2贺维国 3于勇3
作者信息
- 1. 天津大学建筑工程学院,天津 300354;广西大学土木建筑工程学院,广西 南宁 530004
- 2. 天津大学建筑工程学院,天津 300354
- 3. 中铁第六勘察设计院集团有限公司,天津 300133
- 折叠
摘要
为探究螺栓孔防水对内外双侧布置双道密封垫防水体系的影响,依托某超大直径盾构隧道工程,自主设计新型双道密封垫防水性能测试装置,开展考虑螺栓孔构造的内外双道密封垫防水体系耐水压测试.研究结果表明:1)螺栓孔对内外双侧布置双道密封垫的整体防水性能具有一定的控制作用,当螺栓孔防水能力不足时,其存在将成为内外双道密封垫防水体系的薄弱环节,可能早于内道密封垫发生渗漏,由此降低内外双道密封垫防水性能较单道密封垫的提升水平;2)当螺栓孔防水性能达到要求后,与单道密封垫相比,内外双侧布置双道密封垫防水体系的防水能力大幅提升;3)对于超大直径盾构隧道,当管片接缝采用内外双侧布置双道密封垫时,应确保螺栓孔防水性能满足双道密封垫间的协同防水要求.
Abstract
A self-designed device for testing the waterproof performance of double-sealing gaskets is applied in a super-large diameter shield tunnel to conduct water pressure resistance experiments on the inner and outer double-sealing gaskets considering bolt holes.Through these experiments,the waterproof performance of bolt-hole on double-sealing gasket systems is investigated.The results demonstrate the following:(1)The bolt holes control the overall waterproof performance of the double-sealing gaskets fixed on the inner and outer sides of the segmental joint.When they leak under insufficient waterproof capacity,the improvement in waterproof performance of double-sealing gaskets is less,compared to that when a single-sealing gasket is used.(2)The waterproof performance of double-sealing gaskets is considerably enhanced with sufficient waterproof performance of the bolt holes.(3)The waterproof performance of bolt holes should meet the collaborative waterproof requirements of double-sealing gaskets when applying them in super-large diameter shield tunnels.
关键词
盾构隧道/管片接缝防水/双道密封垫/螺栓孔防水/高水压/防水试验Key words
shield tunnel/segmental joint waterproof/double-sealing gaskets/bolt-hole waterproof/high water pressure/waterproof test引用本文复制引用
出版年
2024
NETL
NSTL
万方数据