水平定向钻穿越南水北调总干渠关键技术研究  

Research on Key Technology of Horizontal Directional Drilling across the Main Canal of South-to-North Water Diversion Project

作　　者：赵怀珠 金鑫 温高峰 吴东昌 焦广宇 闫雪峰 ZHAO Huai-zhu;JIN Xin;WEN Gao-feng;WU Dong-chang;JIAO Guang-yu;YAN Xue-feng(Zhejiang First Hydropower Construction Group Co.Ltd.,Hangzhou 310051,China;The Fourth Branch of China Petroleum Pipeline Bureau Engineering Co.Ltd.,Langfang O65000,China;Faculty of Engineering,China University of Geosciences,Wuhan 430074,China)

机构地区：[1]浙江省第一水电建设集团股份有限公司,浙江杭州310051 [2]中国石油管道局工程有限公司第四分公司,河北廊坊065000 [3]中国地质大学<武汉>工程学院,湖北武汉430074

出　　处：《中国给水排水》2022年第18期94-100,共7页China Water & Wastewater

基　　金：国家自然科学基金青年基金项目(42002284)。

摘　　要：河南省南水北调受水区南阳配套工程内乡供水工程的投资建设可从根本上解决内乡城区供水问题,改善城区及周边水生态环境和缓解地下水压力。该工程第二标段供水管道横跨南水北调总干渠,采用水平定向钻法进行铺设,主要穿越地层为含钙质结核微膨胀粉质黏土。管道为涂塑复合钢管,直径为1040 mm,长723.901 m,渠底水平段埋深15.731 m。为确保南水北调总干渠的特殊安全性,严防渠底冒浆,该工程正式钻进前首先进行了沿原穿越轨迹反方向303 m长的试验孔钻进,同时结合泥浆配方优化、套管隔离浅表软弱地层、泄压钻孔、孔底钻具施工控制等技术,解决了岩屑堵塞、钻孔缩径卡钻等一系列问题,保证了该工程顺利实施。The investment and construction of Nanyang supporting Neixiang water supply project in the receiving area of South-to-North Water Diversion Project in Henan Province can fundamentally solve the problem of water supply in Neixiang County,improve the water ecological environment in the city and its surrounding areas,and alleviate the groundwater pressure.The water supply pipeline of the second bid section of the project crosses the main canal of the South-to-North Water Diversion Project and is laid by horizontal directional drilling method,mainly through the stratum of calcareous nodule microexpansive silty clay.The pipeline is plastic-coated composite steel pipe with a diameter of 1040 mm and a length of 723.901 m.The buried depth of the horizontal section at the bottom of the canal is 15.731 m.In order to ensure the special safety of the main canal of the South-to-North Water Diversion Project and strictly prevent mud spillover at the bottom of the canal,a 303 m long test hole was drilled in the opposite direction of the original crossing track before the project was formally drilled.At the same time,combined with mud formulation optimization,casing isolation of shallow soft formation,pressure relief drilling technology,bottom hole drilling tool construction control and other technologies,a series of problems such as cuttings blocking,drilling direction compression and sticking are solved,which ensures the smooth implementation of the project.

关 键 词：南水北调干渠 微膨胀粉质黏土 水平定向钻 冒浆 

分 类 号：TU991[建筑科学—市政工程]