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- rotary drilling bored piles 旋挖钻孔桩
- rotary drilled and bored pile 旋挖钻孔灌注桩
- Accidents often appear in the drilling of impact bored pile, the construction quality of the bored piles is related to the safety of bridges. 摘要冲击钻孔钻进中经常出现事故，钻孔灌注桩的施工质量关系到桥梁结构的安全。
- The paper introduced the use of airlifting reverse circulation rotary drilling techniques in practice of major diameter socket pile operation at Xiangfan city s Hanjiang No. 介绍了使用泥浆护壁气举反循环回转钻进工艺进行襄樊汉江四桥大口径嵌岩桩的施工实践。
- The mast assem-bly supports the rotary drill head and its hoisting mechanism. 支架组件支持转动钻头及其提升机构。
- hole - drilled bored pile 冲孔灌注桩
- Construction technology of rotary cast-in-place bored piles with direct or reverse circulation drilling 正反循环回转钻孔灌注桩施工技术
- The LB 28 large rotary drilling rig is an ideal complement to the LRB combined piling and drilling rigs. LB28大型旋转钻机是LRB组合打桩和钻孔机器的理想补充。
- percussion drilling boring pile 冲孔桩
- With expert chassis of Rotary drilling rig and strong box type mast, it has high working stability. 应用徐工成熟技术制造的旋挖钻机底盘，结实的箱型臂架，具有超强稳定性；
- The forming mechanism of the bias force is the key to the study of the modulated steerable rotary drilling system. 导向力的形成机理是研制旋转导向工具的核心。
- The article introduces construction craft of bored piles and proposes the quality control method. 摘要文章介绍钻孔灌注桩施工工艺，提出质量控制方法。
- In modern rotary drilling, especially formulated mud is used in the well to keep the reservoir fluids in place, among other functions. 在现代旋转钻探作业中,经特殊配制的泥浆的功用之一就是使油井中储集层流体保持在原位不动。
- In light of the characteristics of bored piles, the processes of impro ving the bearing capacity of bored-piles are summarized in this paper. 针对钻孔灌注桩的特点，归纳和总结出提高钻孔灌注桩承载力的工艺措施有预加载法、扩大端承面积和桩端注浆法。
- However, the SEP in diamond rotary drilling was higher than the SEP in percussive drilling in lightly weathered hard as well as in extremely hard rock. 在微风化的坚硬与极坚硬岩石中，金刚石旋转钻进比功则明显高于冲击凿碎比功。
- SR360 rotary drilling when drilling play in the construction of the largest pebbles are more than 50 cm, geological strength 1200 kPa. SR360旋挖钻在施工时打出的最大的卵石有50多公分，地质强度达到1200千帕。
- Common problems and their solutions are put forward in riprap-filled sea formation during bored pile execution. 提出了在抛石填海地层钻孔灌注桩施工中常见问题及处理方法。
- The compaction-under reamed bored pile is a new type one with high bearing capacity and low settlement. 摘要挤扩支盘灌注桩是一种具有高承载力和低沉降量特性的新型桩。
- Researches indicate that the new type of DTH hammer without drilling machine can make DTH hammer achieve percussive and rotary drilling using air compressor. 借鉴凿岩机的转钎机构,利用活塞的回程能量带动钻头旋转。
- The foundation of the pylon is composed of bored piles and separate pile caps connected with prestressed concrete tie beams. 主塔基础采用分离式承台钻孔桩基础，两承台设横系梁连接，系梁为预应力混凝土结构。
