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首页> 外文会议>International pipeline conference >GEOTECHNICAL CHARACTERIZATION OF THE WEBER RIVER CROSSING, UTAH, FOR HDD FEASIBILITY FOR THE 2003 KERN RIVER PIPELINE EXPANSION
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GEOTECHNICAL CHARACTERIZATION OF THE WEBER RIVER CROSSING, UTAH, FOR HDD FEASIBILITY FOR THE 2003 KERN RIVER PIPELINE EXPANSION

机译：犹他州韦伯河道的岩土表征，为2003年肯尼克河管道扩建的HDD可行性

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The 2003 Kern River Pipeline Expansion will loop 635 miles of 36-inch high-pressure natural gas pipeline between southwest Wyoming and southern California and 82 miles of 42-inch pipeline in southern California. The Weber River near Coalville in Summit County, Utah, will be crossed using horizontal directional drilling (HDD) techniques. The original Kern River Pipeline was constructed across the Weber River using conventional open-cut methods in 1991, but environmental factors and the close proximity to other pipelines made HDD a reasonable option to consider. The Weber River floodplain is approximately 3500 feet wide at the pipeline crossing, and contains Interstate Highway 80, US Highway 189, and a paved frontage road. Geometry of the slopes above the floodplain results in an overall HDD horizontal length of 4750 feet with an elevation difference of 88 feet. The geologic setting of the Weber River crossing consists of Cretaceous marine and non-marine sedimentary rocks and Quaternary alluvial and colluvial deposits. The rocks are chiefly sandstone, siltstone, and claystone, with local limestone and coal. Sedimentary beds dip to the west at 10 to 30 degrees, and fractures dip at 60 to 80 degrees. The siltstone and claystone are soft to moderately soft, whereas the sandstone and limestone are moderately hard to hard. The alluvial deposits consist of silty sand to sandy gravel, and the colluvial deposits consist of silty clay to silty sand. A north-trending, west-dipping normal fault shown on published maps nearly coincides with Interstate 80. Geotechnical conditions at the proposed HDD crossing were evaluated by drilling six borings to depths ranging from 100 to 150 feet, and collecting ground penetrating radar (GPR) data at 11 profile lines covering 2170 feet of floodplain. The GPR profile lines were interrupted by channels of the Weber River, canals, and Interstate 80. A 25 MHz antenna was used to obtain radar penetration to effective depths of 50 feet or more. The contact between alluvial deposits and bedrock was detected at depths ranging from 20 to 50 feet. Local relief of the alluvial/bedrock contact was found to be on the order of 10 feet. DrillPath 2 and DrillMud programs were used for a preliminary evaluation of the HDD feasibility. A maximum HDD installation depth of approximately 105 feet was used, and fracture pressures were evaluated for a pilot hole and four stages of back-reaming. Locations of frac-out concern were identified. Final HDD design was performed by others.
机译：2003年克伦河管道扩建将循环635英里的西南怀俄明和南加州之间的36英寸高压天然气管道，南加州南部82英里的管道。犹他州峰会县山寨附近的韦伯河将使用水平定向钻孔（HDD）技术交叉。 1991年，使用传统的开割方法在韦伯河上建造了原始的凯恩河管道，但环境因素和对其他管道的密切接近，使HDD合理选择需要考虑。韦伯河洪泛平原在管道交叉口约3500英尺，并包含80号州际公路，美国公路189号和铺好的正面道路。洪泛区上方的斜坡几何形状导致整体硬盘水平长度为4750英尺，高度差为88英尺。韦伯河道的地质环境包括白垩纪海洋和非海洋沉积岩和四季冲积和抗菌沉积物。岩石主要是砂岩，粉砂岩和粘土岩，局部石灰石和煤炭。沉积床在10至30度浸泡到西部，裂缝浸渍为60至80度。硅铁晶和粘土砂柔软，柔软，而砂岩和石灰石适度难以努力。冲积沉积物由粉状砂砂砂砂砾组成，血液沉积物由粉质粘土组成。出版地图上显示的北趋势西浸正常故障几乎与州际公路符合80.所提出的硬盘交叉口的岩土条件通过钻出六个钢管来评估从100到150英尺的深度，并收集射线雷达（GPR）在11个轮廓线的数据覆盖2170英尺的洪泛区。 GPR轮廓线被韦伯河，运河和州际公路的通道中断。25 MHz天线用于获得雷达渗透到50英尺或更长时间的有效深度。在20至50英尺的深度下检测发生冲积沉积物和基岩之间的接触。发现局部浮雕/基岩接触的触点约为10英尺。钻孔钻2和钻探计划用于对HDD可行性进行初步评估。使用大约105英尺的最大HDD安装深度，并评估裂缝压力，用于试验孔和四个后铰孔的四个阶段。确定了FRAC-OUT关注的位置。最终的硬盘设计由其他人进行。

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