摘要
新建管道与在役管道并行施工时,部分地区由于施工空间受限,新建管道管沟开挖时需采用钢板桩支护并在在役管道上方堆土施工。为确定此类工程中在役管道的本体安全及新建管道的支护安全,提出了针对在役管道径向稳定性及环焊缝应力的验算方法,针对新建管道支护结构应力、稳定性、位移及截面强度的验算方法。以在役管道Ⅰ、Ⅱ及与其并行施工的新建唐山LNG管道为例,利用上述方法对其安全性进行校核,结果表明:当新建唐山LNG管道挖深3 m,采用9 m钢板桩支护管沟,并在两侧在役管道Ⅰ、Ⅱ上方堆土不超过2 m时,在役管道Ⅰ、Ⅱ的本体安全及新建管道的支护安全均满足安全性要求。该方法对于相似施工空间受限条件下进行沉管作业时确定并行施工安全性具有参考价值。(图5,表3,参20)
In the case that a new pipeline is constructed in parallel to an in-service pipeline, the construction method of steel sheet pile support and soil accumulation above the in-service pipelines is required for the excavation of new pipeline trenches due to the limited construction space in some areas. In order to ensure the ontological safety of in-service pipelines and the support safety of new pipelines in such cases, a method was proposed to check the radial stability and girth weld stress of in-service pipelines. Meanwhile, a calculation method was also developed for the stress of support structure, stability, displacement and cross-section strength of new pipelines.Hereby, the safety of new Tangshan LNG Pipeline and the in-service pipelines Ⅰ and Ⅱ was checked with the above methods. The excavation depth of the new Tangshan LNG Pipeline was 3 m with 9 m steel sheet piles supported the pipe trench, and the height of soil piles above the in-service pipelines Ⅰ and Ⅱ on both sides were not more than 2 m. In such case, the ontological safety of the in-service pipelines Ⅰ and Ⅱ as well as the support safety of the new pipeline could meet the safety requirements. Generally, this method could provide rererence to determine the safety of parallel construction during pipe sinking under similar conditions of limited construction space.(5 Figures, 3 Tables, 20 References)
作者
才政
郝曙阳
李彦龙
唐文斗
张天民
王丙仁
王树立
CAI Zheng;HAO Shuyang;LI Yanlong;TANG Wendou;ZHANG Tianmin;WANG Bingren;WANG Shuli(Caofeidian Xintian LNG Co.Ltd;Quanzhou Vocational and Technical University)
出处
《油气储运》
CAS
北大核心
2023年第1期46-53,共8页
Oil & Gas Storage and Transportation
关键词
新建管道
在役管道
并行施工
安全评价
本体安全
支护安全
new pipelines
in-service pipelines
parallel construction
safety evaluation
ontological safety
support safety
作者简介
才政,男,1994年生,工程师,2019年硕士毕业于常州大学油气储运工程专业,现主要从事油气管道施工安全方向的研究工作。地址:河北省唐山市曹妃甸工业区金岛大厦C座,063200。电话:13287385579.Email:caizheng@suntien.com;通信作者:王树立,男,1957年生,教授,2002年博士毕业于大连理工大学动力机械与工程专业,现主要从事油气管道运营安全方向的研究工作。地址:福建省泉州市丰泽区泉州职业技术大学,362268。电话:13813698610.Email:wsl@cczu.edu.cn。
