山区管道工程坡面径流防控设计及截排水体系  

Fortification design of slope runoff as well as interception and drainage system for pipeline engineering in mountain area

作　　者：周大淜 罗扬 葛华 郭涵宇 王棠昱 ZHOU Dapeng;LUO Yang;GE Hua;GUO Hanyu;WANG Tangyu(China Petroleum Engineering&Construction Corp.Southwest Company,610095,Chengdu,China;Pipe China Southwest Pipeline Company,610095,Chengdu,China)

机构地区：[1]中国石油工程建设有限公司西南分公司,成都610095 [2]国家管网集团西南管道有限责任公司,成都610095

出　　处：《中国水土保持科学》2023年第6期71-79,共9页Science of Soil and Water Conservation

基　　金：国家管网集团西南管道有限责任公司立项科研课题“山区管道全位置自动焊适应性研究”(KY2019-007)。

摘　　要：为系统研究山区管道工程坡面径流防控设计及措施体系,对公路、铁路、市政、水土保持及油气管道行业设计标准规范进行对标分析,选取南方湿润区8个典型管道作业带坡面开展水文计算和截排水体系探讨。研究表明:1)根据管道口径和防护对象确定防控标准,建议管道顺坡敷设设计降雨重现期取3~5 a,管道横坡敷设设计降雨重现期≥DN 800口径管道取20~30 a,≥DN 200~DN 800中小口径管道取15~20 a,口径<DN 200管道取10~15 a;2)管道工程坡面径流采用简化推理公式开展水文计算更合理,采用地方暴雨图集参数可提高计算精度;3)南方湿润区典型坡面横坡敷设、顺坡敷设等长度管段坡面汇流量相差8~10倍,横坡敷设应经水文计算在坡面设置永久性截排水沟,顺坡敷设可采用间距25~30 m截水沟、阻水梗截断径流,区间流量0.01~0.02 m^(3)/s,耐久性要求较低;4)北方干旱、半干旱地区可采用鱼鳞坑、水平沟等整地方式调控坡面径流。研究成果可为山区管道工程水工保护和水土保持设计、施工提供参考。[Background]Water damage is the main disaster that threatens the safety of pipelines in mountain.Runoff scouring of pipeline construction scope is an important manifestation of water damage.Although some researches have been carried out on prevention and control of slope runoff,however,problems of interception and drainage of construction scope of pipeline in mountain still often occurs,such as inadequate protection,excessive protection or unreasonable protection.Therefore,it is necessary to conduct a systematic study on design standards and protective measures system of slope runoff of construction scope in mountainous areas.[Methods]We selected highway,railway,municipal,water and soil conservation,oil and gas pipeline industry design standards and specifications for comparative analysis on interception and drainage of slope runoff.Then we selected 4 typical along-laying slopes and 4 typical cross-laying slopes of the mountain pipeline from Puning,Guangdong,Beilun,Zhejiang,Cangxi,Sichuan,Tongnan,and Congqing in the southern humid area to carry out hydrologic calculation and discuss the design essentials of interception and drainage system.[Results]1)Different design standards of interception and drainage are formulated according to different engineering grades and protection objects in highway,railway,municipal,water and soil conservation.2)Simplified rational formula shall be adopted for hydrologic calculation of slope runoff,and the calculation accuracy can be improved by using local rainstorm atlas parameters.3)According to the calculation,the slope runoff of pipeline section with equal length in cross-laying slope is 8-10 times that of along-laying slope in southern humid area.For along-laying slope,the interval flow is 0.01-0.02 m^(3)/s with an interval of 25-30 m,and the intercepting ditches or water blocking stems can be used to intercept runoff.The durability requirements for such structures are relatively low.For cross-laying slope,the interval flow is 0.12-0.20 m^(3)/s with an interval of 30 m,and the

关 键 词：山区管道 水土保持 水工保护 坡面截排水 设计洪水 坡面径流 设计标准 

分 类 号：S157.1[农业科学—土壤学]