The analytic hierarchy process (AHP) has gained increasing attention in construction
management (CM) domain as a technique to analyse complex situations and make sound …

为解决目前井下瓦斯抽采短钻孔, 探放水钻孔及地质勘探钻孔等非受控近水平钻孔轨迹随钻测量
发展缓慢问题, 开展了非定向近水平钻孔轨迹参数解算及现场应用. 对近水平钻孔轨迹的5 …

Horizontal directional drilling (HDD) is minimally-intrusive construction method for installing
underground utilities and pipelines. Today, HDD is becoming widely accepted as a cost …

Horizontal directional drilling (HDD) as one of the most popular trenchless technology has
seen a rapid growth during the past decades. Hole cleaning has been one of the most …

Coal will still be China's basic energy for quite a long time. With the increase of mining
depth, gas content and pressure also increase. The problems of gas emission and overrun …

对定向钻穿越施工中的弯曲半径和管道回拖力等关键参数进行的理论研究表明,
工程经验公式用于管道穿越设计存在不足. 对影响各参数的基本因素进行了分析 …

Municipal infrastructure such as transportation, waste disposal, and utilities are rapidly
expanding due to an increase in urbanization. Subsequently, municipalities are faced with …

Drilling mud (or drilling fluid) is a vital component in a horizontal directional drilling (HDD)
crossing project, for which a key function is the removal of the cuttings from the borehole …

Contractors, consultants, and decision makers are challenged to estimate time and cost of
new pipe installations using Horizontal Directional Drilling (HDD). This is because …

The application of non-excavation construction technology, such as the pipe jacking method,
has obvious advantages in building urban underground space engineering projects, which …