长节段大吨位预制拼装综合管廊接头防水现场试验研究
Study on Field Test of Joint Waterproofing of Long-segment Heavy-tonnage Prefabricated Assembled Utility Tunnel
马华兵 1冯良平 2王恒栋 3霰建平 4商冬凡 5崔光耀6
作者信息
- 1. 中交二公局第六工程有限公司,西安 710075
- 2. 中交公路长大桥建设国家工程研究中心有限公司,北京,100120
- 3. 上海市政工程设计研究总院(集团)有限公司,上海 200092
- 4. 中交二公局工程设计研究院,西安 710065
- 5. 河北省建筑科学研究院有限公司,石家庄 050021
- 6. 北方工业大学土木工程学院,北京 100144
- 折叠
摘要
为验证雄安新区启动区长节段大吨位预制拼装综合管廊的防水性能,开展长节段大吨位综合管廊接头防水现场试验,分析不同工况注水加压后两类止水带的防水性能.结果表明:两类止水带均能满足管廊正常使用状态的防水要求;两类止水带处于管廊张拉力失效工况下,Ⅰ类止水带出现2处漏水点,Ⅱ类止水带未出现漏水情况,这是因为Ⅰ类止水带采用静置拼接方法,管节接头拼缝宽度分布不均,张拉力失效时易出现渗漏水现象;两类止水带处于管节错位工况下,Ⅰ类止水带未出现漏水情况,Ⅱ类止水带出现3处漏水点,这是因为Ⅱ类止水带采用悬空拼接方法,其张拉力小于Ⅰ类止水带,错位条件下更易出现渗漏水现象.推荐该工程使用Ⅱ类止水带进行管节接头防水施工.
Abstract
In order to demonstrate the waterproof performance of the long-segment heavy-tonnage prefabricated assem-bled utility tunnel in the startup zone of Xiong'an New Area,the field test of joint waterproofing of long-segment heavy-tonnage utility tunnel has been conducted,and the waterproof performance of two types of waterstops after wa-ter injection and pressurization in different cases has been analyzed.As the results indicate:both types of waterstops can meet the waterproofing requirements for the tunnel in normal operation.In the case of tensioning force induced failure of the two types of waterstops,Class Ⅰ waterstop has 2 leakage points and Class Ⅱ waterstop has no leakage point.The reason is that Class Ⅰ waterstop is spliced when kept still and the nonuniform splice width at element joint will result in tensioning force induced failure and thus water leakage.In the case of element dislocation of the two types of waterstops,Class Ⅰ waterstop has no leakage and Class Ⅱ waterstop has 3 leakage points.The reason is that Class Ⅱ waterstop is spliced when suspended and its tensioning force is less than that of Class Ⅰ waterstop,so leakage is more likely to occur in the case of dislocation.For this project,it is recommended to use Class Ⅱ water-stop for waterproofing of element joint.
关键词
城市综合管廊/长节段/大吨位/接头防水/注水加压/现场试验Key words
Urban utility tunnel/Long segment/Heavy tonnage/Joint waterproofing/Water injection and pressuriza-tion/Field test引用本文复制引用
出版年
2024
NETL
NSTL
万方数据