In drilling cobble and gravel formation, diamond enhanced tungsten carbide composite spherical crown button bits without strengthened gage achieve an average drilling rate of 2.
介绍了金刚石—硬质合金复合球齿钻头在内蒙古某地区铀矿床卵砾石层中的生产试验情况。
On the foundation of analyzing cobble and gravel s physics and mechanics characteristics, we took them as foundationpadding layer and applied them in engineering.
在对黑山地区卵砾石的物理力学性质指标进行分析的基础上,将该卵砾石作为地基垫层应用于实际工程之中,并通过载荷试验、动力触探等方法测试该垫层的各项指标。
Application of diamond enhanced tungsten carbide composite button to gravel formation;
金刚石-硬质合金复合齿钻头在卵砾石地层中的应用
Grain size survey of gravels in the section from Military Museum to Baiduizi for the programming Line No.9 of Beijing Metro
北京地铁九号线(军事博物馆—白碓子段)卵砾石粒径调查研究
When small powered rotary rigs drill in mudstone,shale and big particle gravel with a diameter of 1,500mm for bored piles, the conventional inserted rock screw bits often present themselves slow penetration or even no penetration due to the rig s small power and small WOB.
采用小动力无加压旋挖钻机在粒径较大的卵砾石地层和泥页岩地层中进行 1500mm以上大口径钻孔灌注桩施工,由于钻机动力小且不能加压,用常规嵌岩短螺旋钻头钻进出现进尺慢或不进尺现象。
Successful application of horizontal directional drilling to pipe-laying construction through sand gravel strata
水平定向钻进技术在砂卵砾石层中的成功应用
STUDY OF DESIGN AND CONSTRUCTION PARAMETERS FOR UNDERGROUND RESERVOIR INTER-SEEPAGE DAM IN PEBBLE BED
卵砾石层中地下水库截渗坝设计与施工参数研究
Application of high-pressure jet grouting to underground reservoir with pebble bed
高喷灌浆技术在卵砾石层地下水库构筑中的应用
Field test study of methods for supporting large-section inclined shaft in gravel layer
卵砾石层大断面斜井井筒支护方法现场试验研究
Grain size survey of gravels in the section from Military Museum to Baiduizi for the programming Line No.9 of Beijing Metro
北京地铁九号线(军事博物馆—白碓子段)卵砾石粒径调查研究
The conclusion is that the high-pressure gunite technique applied to 30 m thick of sand and gravel layer is feasible.
通过本次经验为在深厚层砂卵砾石层中进行高喷灌浆施工提供借鉴。
A rock consisting of pebbles and gravel embedded in cement.
砾岩由水泥固结的卵石和砾石形成的砾岩
Gravel is an unconsolidated mixture of rock fragments or pebbles.
砂砾是砾石岩石碎片或卵石的松散的混合物。
An unconsolidated mixture of rock fragments or pebbles.
砾石岩石碎片或卵石的松散的混合物
To apply a surface of rock fragments or pebbles to.
用砂砾铺覆以岩石碎片或卵石的表面
Reinforcing this layer by grunting mode is introduced.
介绍采用注浆方式来加固砂卵（砾）石层。
Study on Simulation Grouting Experiment in Gravel & Mechanism of Permeating Grouting;
砂卵（砾）石层模拟注浆试验及渗透注浆机理研究
coarse beach gravel of small water-worn stones and pebbles (or a stretch of shore covered with such gravel).
水磨石和小鹅卵石构成的粗糙的海滩砾石（或覆盖这样的砾石的一片海滨）。
Potholes are developed in the solid rock of the bed by pebbles and boulders swirling around in eddy currents.
坚固的岩石床由于旋涡中盘旋的卵石和巨砾形成很多锅穴。
The ribbon stones are consisted of different color pebbles such as agate, chalcedony, jasper and quartzite.
纹石系由五颜六色的玛瑙、玉髓、碧玉、石英岩等卵砾所组成。
(of a shore or shoreline) having an extensive gently sloping area covered with sand or gravel or shingle down to the water line.
（指海岸或者海岸线）具有广阔、坡度平缓的地区，从上面到水线都覆盖着沙、沙砾或者鹅卵石。
Theory of Perneation Grouting about Clay-cement Grout and Application of Numerrical Simulation among the Soil Including of Sands and Pebbles
粘土固化浆液渗透注浆理论与数值模拟在砾砂、卵石土层中的应用研究
Effects of Gravel on Water Retention Capability of Purple Gravelly Soils in a Hilly Area
砾石对丘陵紫色砾质土持水性的影响