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泥浆在水平定向钻穿越沁河倒虹吸工程中的应用分析 预览
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作者 刘文成 《水电科技》 2019年第2期108-109,共2页
焦作市沁北引黄灌区沁北干渠穿沁倒虹吸工程为长距离、大管径、深埋深的水平定向钻穿越工程,是在沁河上穿越大管径、长度长的一次大胆尝试。在管道穿越过程中拖管是成败的关键,而泥浆是整个水平定向钻施工过程钻导向孔、分级扩孔及管道... 焦作市沁北引黄灌区沁北干渠穿沁倒虹吸工程为长距离、大管径、深埋深的水平定向钻穿越工程,是在沁河上穿越大管径、长度长的一次大胆尝试。在管道穿越过程中拖管是成败的关键,而泥浆是整个水平定向钻施工过程钻导向孔、分级扩孔及管道回拖施工过程中的血液和润滑剂,钻孔、扩孔及拖管能够成功,泥浆成为水平定向钻穿越工程中的关键因素之一。泥浆停止循环或者泥浆质量不合格,整个水平定向钻工程施工将无法进行。因此,泥浆在水平定向钻施工中的作用和地位也越来越引起专业技术人员的重视,我们对泥浆在水平定向钻工程技术方面的作用和意义的认识也越逐步深入和提高。结合沁北引黄干渠施工技术的设计方案、施工原理及具体方案应用,提出泥浆在水平定向钻穿越沁河倒虹吸工程中的应用分析,对长距离、大管径、深埋深的水平定向钻穿越施工具有重要意义。 展开更多
关键词 泥浆 水平定向钻 穿越施工 应用
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浅谈建筑工程中钻孔灌注桩施工工艺的运用 预览
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作者 刘超琼 《江西建材》 2019年第8期130-130,132共2页
本文将钻孔灌注桩施工工艺为研究对象,以某办公楼为例,阐述钻孔灌注桩施工流程,分析易发质量问题及应对措施,为施工单位合理应用该工艺提供理论及实践参考。
关键词 建筑工程 钻孔灌注桩 泥浆
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Effects of key species mud snail Bullacta exarata (Gastropoda) on oxygen and nutrient fluxes at the sediment-water interface in the Huanghe River Delta, China 预览
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作者 Baoquan Li Tjeerd J. Bouma +6 位作者 Quanchao Wang Laura M. Soissons Francesco Cozzoli Guanghai Feng Xiaojing Li Zhengquan Zhou Linlin Chen 《海洋学报:英文版》 SCIE CAS CSCD 2019年第8期48-55,共8页
Since the mud snail Bullacta exarata was introduced for economic aquaculture in the Huanghe River(Yellow River) Delta in 2001, its quick population growth and expanded distribution make it a key-species in the interti... Since the mud snail Bullacta exarata was introduced for economic aquaculture in the Huanghe River(Yellow River) Delta in 2001, its quick population growth and expanded distribution make it a key-species in the intertidal zone of this area. This significantly contributed to the economic income of the local people, but its potential ecological impact on the benthic ecosystem remains unknown. A mesocosm study was conducted to test whether its bioturbation activities affect the microphytobenthos(MPBs;i.e., sedimentary microbes and unicellular algae)productivity and the nutrient exchange between the sediment-water interface. Our results show that the mud snail significantly impacted the dissolved oxygen(DO) flux across the sediment-water interface on the condition of normal sediment and light treatment, and significantly increased the ammonium efflux during recovery period in the defaunated sediment and dark treatment. The presence of micro-and meiofauna significantly increased the NH4-N flux in dark treatment. Whereas, in light treatment, these small animals had less effects on the DO and NH4-N flux between sediment-water interface. Our results provide better insight into the effect of the mud snail B.exarata on the ecosystem functioning via benthic fluxes. 展开更多
关键词 BIOTURBATION MUD SNAIL Bullacta exarata OXYGEN FLUX nutrient FLUX benthic metabolism Huanghe River(Yellow River) Delta
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某特大桥海上钻孔桩施工技术 预览
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作者 袁振华 《建筑技术开发》 2019年第14期55-57,共3页
结合工程实际,阐述了海上钻孔桩施工的钢护筒插打方法,平台搭设方案,泥浆的制备、循环和净化,桩基的开孔、钻进、终孔和灌注,总结海上钻孔桩施工的方法,适用于今后的海上钻孔桩施工。
关键词 海上钻孔桩钢护 筒插打平台搭设 泥浆处理
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鲁柘澄泥砚的性能研究
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作者 吴咏梅 《中国陶瓷》 CAS CSCD 北大核心 2019年第3期74-78,共5页
鲁柘砚是山东省泗水县柘沟镇产的一款澄泥砚,鲁柘砚的原材料是柘沟当地的土矿,这一土矿有五种颜色,本文将综合分析柘沟土矿的材料性能,研究古代澄泥砚与现代澄泥砚的制作工艺,发现鲁柘澄泥砚的真、善、美。
关键词 鲁柘砚 澄泥 工艺 性能
基础桩施工废弃泥浆泥水分离技术 预览
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作者 翟玉新 《建筑技术》 2019年第2期159-161,共3页
在混凝土灌注桩被大规模用于工程建设的同时,也产生了大量的废弃泥浆,带来环境污染和巨大的处理费用。采用了一种基于化学破乳原理的废弃泥浆处理的新方法,可分离泥浆中的水和固体废弃物并进行固化,处理方法简单,已在北京通州某工程中应... 在混凝土灌注桩被大规模用于工程建设的同时,也产生了大量的废弃泥浆,带来环境污染和巨大的处理费用。采用了一种基于化学破乳原理的废弃泥浆处理的新方法,可分离泥浆中的水和固体废弃物并进行固化,处理方法简单,已在北京通州某工程中应用,社会经济效益良好。 展开更多
关键词 基础桩 泥浆 泥水分离
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Tidal Asymmetry Changes in a Shallow Mud Estuary by a Restoration Project 预览
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作者 LIANG Huidi KUANG Cuiping +3 位作者 GU Jie MA Yue CHEN Kuo LIU Xu 《中国海洋大学学报:英文版》 SCIE CAS CSCD 2019年第2期339-348,共10页
The tidal asymmetry-induced siltation below tidal barriers is a worldwide problem that restricts regional socio-economic and environmental development.The hydrodynamic processes of the small mud estuary also feature a... The tidal asymmetry-induced siltation below tidal barriers is a worldwide problem that restricts regional socio-economic and environmental development.The hydrodynamic processes of the small mud estuary also feature a high uncertainty after estuary restoration measures.In this study,a hydrodynamic model based on the MIKE21 is used to quantify the responses of tidal asymmetry to a two-phase restoration project in Shuanglong Estuary,Bohai Bay,China.According to the numerical modeling results,the tidal flat removal in the upper estuary(first-phase restoration)induces the flood asymmetry switching to the ebb asymmetry in unrestored reach but enhances flood asymmetry in widening restored reach.Although the tidal asymmetry reverts to flood-dominated pattern after full restoration over the estuary,the imbalance between flood and ebb velocities is relieved.A possible net sediment transport pattern based on a comparison of dominant asymmetric current and actual sediment transport period shows net sediments in the upper estuary and inlet transport seaward and landward,respectively,in the first-phase restoration,whereas landward net sediment transport occurs in the whole estuary under the second-phase restoration scenario.Given these results,we assume that a switch from the flood-dominated estuary to ebb-dominated estuary can be caused by redesigning the cross-sectional profile.The quantitative comparison of Lagrangian residual currents also implies that a channel–shoal structure rather than a flat bathymetry can promote the mass transport.Therefore,reshaping the channel–tidal flat system in restoration projects can prevent the sedimentation of the estuary and improve the water environment. 展开更多
关键词 TIDAL asymmetry RESTORATION project MUD ESTUARY net SEDIMENT transport
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利用温度检测钻孔灌注桩混凝土拌合物面的研究 预览
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作者 杜鹏 刘晓玲 +2 位作者 徐新战 常镪 付连红 《物探与化探》 CAS 北大核心 2019年第3期667-671,共5页
基于水化放热原理和室内外试验,发现混凝土拌合物层和浮浆层两者有明显的温差,显示可通过温度变化来确定混凝土拌合物灌注高度。据此设计了一种便携式用于判定混凝土拌合物面是否到达设计高度的温控式装置:在设计桩顶高度位置及其下方50... 基于水化放热原理和室内外试验,发现混凝土拌合物层和浮浆层两者有明显的温差,显示可通过温度变化来确定混凝土拌合物灌注高度。据此设计了一种便携式用于判定混凝土拌合物面是否到达设计高度的温控式装置:在设计桩顶高度位置及其下方50 cm处分别埋置一个温度传感器,在设计桩顶高度下方50 cm的温度传感器获得混凝土拌合物的温度峰值,利用设计桩顶高度位置的温度传感器的温度峰值判定混凝土拌合物顶。建议混凝土拌合物超灌在设计桩顶高度位置即第2个温度传感器上方50 cm,比规范要求少超灌0.3 m,能节约混凝土。 展开更多
关键词 钻孔灌注桩 混凝土拌合物 浮浆 泥浆 温控式装置 温度传感器
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电法与TSP法探测在岩溶隧道涌突泥处治中的应用 预览
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作者 王朋朋 王景龙 张帆 《交通科技》 2019年第3期89-92,共4页
隧道涌突泥处治需要查明灾害体的规模特征,采用地表与洞内相结合的综合预报手段能够对不良地质体进行有效探测。文中以风番坡隧道涌突泥为例,通过高密度电法、大地电磁法及TSP法探测相结合的方法,查明灾害体的主要分布特征,并采用超前... 隧道涌突泥处治需要查明灾害体的规模特征,采用地表与洞内相结合的综合预报手段能够对不良地质体进行有效探测。文中以风番坡隧道涌突泥为例,通过高密度电法、大地电磁法及TSP法探测相结合的方法,查明灾害体的主要分布特征,并采用超前地质钻探对探测成果进行验证及修正,确定灾害体的具体范围,指导了处治设计。 展开更多
关键词 隧道 涌突泥 高密度电法 大地电磁法 TSP
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Investigation of the medium calcium based non-burnt brick made by red mudand fly ash:durability and hydration characteristics 预览
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作者 Ying-tang Xu Bo Yang +4 位作者 Xiao-ming Liu Shuai Gao Dong-sheng Li Emile Mukiza Hua-jian Li 《矿物冶金与材料学报:英文版》 SCIE EI CAS CSCD 2019年第8期983-991,共9页
Red mud is a type of highly alkaline waste residue produced in the process of alumina smelting by the Bayer process.Based on the idea of medium calcium content,solid wastes such as red mud and fly ash were used to pre... Red mud is a type of highly alkaline waste residue produced in the process of alumina smelting by the Bayer process.Based on the idea of medium calcium content,solid wastes such as red mud and fly ash were used to prepare non-burnt bricks;and the mass ratio of CaO/SiO2 was selected in the range of 0.88–1.42.Mechanical properties and durability were investigated with a compressive strength test.X-ray diffractometry(XRD),scanning electron microscope(SEM),and Fourier transform infrared spectroscopy(FTIR)techniques were used to characterize the hydration characteristic.The environmental performance was analyzed by Inductively Coupled Plasma Mass Spectrometry(ICP).The results indicated that the mechanical properties and the durability were optimal when the mass ratio of CaO/SiO2 was 1.23.The hydration products were mostly C–S–H gel,ettringite,Na4Ca(Si10All6)O32·12H2O and Ca3Al2(SiO4)(OH)8.They were responsible for the strength development,and the CaO/SiO2 mass ratio of 1.23 had the best polymerized structure.The results of an environmental performance test showed that the heavy metals in the raw materials were well-solidified in the brick.Therefore,this paper provides an effective solution for use of solid wastes in building material. 展开更多
关键词 MEDIUM CALCIUM content red MUD fly ash non-burnt BRICK
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钻探施工中泥浆的应用研究 预览
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作者 窦小龙 《科技创新与应用》 2019年第23期173-174,共2页
钻探施工对泥浆要严格使用,这样,才能确保钻探施工全面顺利进行.从技术层面看,制浆材料的选择、泥浆处理剂配比都直接关系到泥浆性能,只有全面保证性能优质,才能更好地提升施工效果.文章重点分析了各种常用制浆材料及化学处理剂性能,进... 钻探施工对泥浆要严格使用,这样,才能确保钻探施工全面顺利进行.从技术层面看,制浆材料的选择、泥浆处理剂配比都直接关系到泥浆性能,只有全面保证性能优质,才能更好地提升施工效果.文章重点分析了各种常用制浆材料及化学处理剂性能,进一步提出在泥浆中的作用,为钻探施工正确应用泥浆提供借鉴. 展开更多
关键词 钻探施工 泥浆 使用
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系统功能语言学视角下Dianne Wolfer的作品Photographs in the Mud的及物性分析 预览
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作者 方小花 《海外英语》 2019年第14期81-82,共2页
Photographs in the Mud是澳大利亚作家Dianne Wolfer的第一部图画书,该书从一个澳大利亚士兵和一个日本士兵以及远方等待他们平安归来的家庭三者的角度描述了二战中太平洋科科达战役的一场战斗。通过言语交流让这两个不同阵营的士兵产... Photographs in the Mud是澳大利亚作家Dianne Wolfer的第一部图画书,该书从一个澳大利亚士兵和一个日本士兵以及远方等待他们平安归来的家庭三者的角度描述了二战中太平洋科科达战役的一场战斗。通过言语交流让这两个不同阵营的士兵产生共鸣。及物性在刻画人物和篇章衔接方面起关键作用。因此该文通过运用系统功能语言学及物性系统的六大过程对本书选段进行了分析,得出文字背后隐含的深层含义,即士兵面对国家义务和家人责任之间选择的矛盾,他们内心厌恶战争却又不得不为了自己的国家而参战的矛盾,反映出战争不仅给两个士兵还有他们的家人造成的悲剧的新思考。 展开更多
关键词 Photographs in the Mud 及物性 过程 语篇分析
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Study on Parameters Selection of Oil-Based Mud Formation Imaging Tool (OBIT) Based on FEM 预览
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作者 Yue Liu 《长江油气(英文版)》 2019年第1期43-58,共16页
In a typical oil-based mud environment, the borehole fluid and mud cake are highly resistive and will not permit any significant current flow from the tool to the formation. In order to overcome the high insulation ef... In a typical oil-based mud environment, the borehole fluid and mud cake are highly resistive and will not permit any significant current flow from the tool to the formation. In order to overcome the high insulation effect of the medium, measurement current must be injected at a relative high frequency since most of the conduction is due to capacitive coupling. In this paper, an OBIT numerical model based on four-terminal method was established to study the tool responses during the measurements. The influences of tool parameters, such as the area and distance of current-injector electrodes, inject frequency, distance of button sensors, standoff and electrical properties of borehole fluid, the tool responses, were investigated and the tool optimization was discussed. 展开更多
关键词 Oil Based MUD Image LOGGING Capacitive Coupling Four-Terminal Method
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超深圆形地下连续墙施工关键技术研究 预览
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作者 周正德 孙梓栗 +2 位作者 龚震宇 徐前卫 胡开富 《交通运输研究》 2019年第3期64-71,共8页
为解决深基坑地下连续墙施工过程中经常出现的槽壁垂直度难以控制、槽壁坍塌风险高以及槽底沉渣难以清除等问题,综合运用室内试验、现场实测等技术手段,着重对超深圆形地下连续墙施工过程中基槽开挖、泥浆控制、钢筋笼施工三个方面的关... 为解决深基坑地下连续墙施工过程中经常出现的槽壁垂直度难以控制、槽壁坍塌风险高以及槽底沉渣难以清除等问题,综合运用室内试验、现场实测等技术手段,着重对超深圆形地下连续墙施工过程中基槽开挖、泥浆控制、钢筋笼施工三个方面的关键技术进行阐述,得到了以下结论:(1)泥浆比重随开挖深度增加逐渐增大,黏度在开挖过程中变化不大,含砂率在开挖过程中随地层的变化而变化;(2)在施工中成槽速度应遵循以下变化规律:上部黏土层(正常)→中部含砾石黏土层(较慢)→下部黏土层(慢)→底部岩层(最慢);(3)钢筋笼吊装时,采用等强剥肋滚压直螺纹对接两节钢筋笼,实际有效连接率达到95%以上,连接效果好。 展开更多
关键词 深基坑 圆形地下连续墙 成槽施工 泥浆 施工控制
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淤泥板框压滤、脱水阶段特征及简化评价指标研究 预览
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作者 崔岩 侯豪 +1 位作者 吴思麟 林乃喜 《环境科技》 2019年第4期1-5,共5页
板框压滤工艺在疏浚泥浆的脱水中广泛应用,板框压滤过程中调理剂种类及用量,往往需要通过实验来确定,然而框压滤脱水试验耗时长、用泥多、效率低下,因此亟需寻找一种能够作为泥浆板框压滤脱水效率的简化评价的试验方法及指标。针对这一... 板框压滤工艺在疏浚泥浆的脱水中广泛应用,板框压滤过程中调理剂种类及用量,往往需要通过实验来确定,然而框压滤脱水试验耗时长、用泥多、效率低下,因此亟需寻找一种能够作为泥浆板框压滤脱水效率的简化评价的试验方法及指标。针对这一问题,进行了多种调理剂调理疏浚泥浆的板框压滤试验和比阻试验,发现不同调理剂调理的泥浆在板框压滤的过滤阶段和固结阶段中,均在过滤阶段就脱出了约80%的水分,且不同调理剂调理的泥浆在过滤阶段脱水速度差异较大,在固结阶段脱水速度几乎没有差异,同时不同调理剂调理的泥浆的比阻所反映的过滤性能和其在板框压滤过滤阶段所表现的过滤性能相对应,因此在未来筛选淤泥板框压滤调理剂的研究中,可以使用比阻作为板框压滤脱水效率的简化评价指标。 展开更多
关键词 板框压滤 比阻 过滤 固结 脱水效率 淤泥
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风暴作用下淤泥质潮滩-潮沟系统地貌演变研究进展 预览
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作者 龚政 张岩松 +2 位作者 赵堃 周曾 张长宽 《水利水电科技进展》 CSCD 北大核心 2019年第4期75-84,共10页
鉴于风暴作用对淤泥质潮滩-潮沟系统的地貌演变有重要的影响,对海岸工程的安全以及海岸带资源的开发与保护有重要的实用价值,从研究方法、演变特点和动力机制等方面回顾了风暴作用下淤泥质潮滩-潮沟系统地貌演变的研究进展。认为淤长型... 鉴于风暴作用对淤泥质潮滩-潮沟系统的地貌演变有重要的影响,对海岸工程的安全以及海岸带资源的开发与保护有重要的实用价值,从研究方法、演变特点和动力机制等方面回顾了风暴作用下淤泥质潮滩-潮沟系统地貌演变的研究进展。认为淤长型潮滩风暴剖面的形态特征一般呈“中间冲刷,两端淤积”,但其动力机制研究系统性还不够;盐沼可以较好地削弱风暴,起到固沙效果,但其侧向演变值得进一步关注;风暴作用下潮沟的活动性大大增强,其中潮沟摆动及其岸壁侵蚀机理是亟待解决的科学问题。指出未来应进一步加强现场资料的获取,并通过数值模拟、物理模型试验等手段,加强对风暴作用下潮滩-潮沟系统地貌演变机理的研究。 展开更多
关键词 风暴 淤泥质 潮滩-潮沟系统 地貌演变 潮沟摆动 盐沼
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Iron Speciation of Mud Breccia from the Dushanzi Mud Volcano in the Xinjiang Uygur Autonomous Region, NW China 预览
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作者 XU Wang ZHENG Guodong +5 位作者 MA Xiangxian Danielle FORTIN David R. HILTON LIANG Shouyun CHEN Zhi HU Guoyi 《地质学报:英文版》 SCIE CAS CSCD 2018年第6期2201-2213,共13页
Organic-inorganic interactions occurring in petroleum-related mud volcanoes can help predict the chemical processes that are responsible for methane emissions to the atmosphere.Seven samples of mud breccia directly ej... Organic-inorganic interactions occurring in petroleum-related mud volcanoes can help predict the chemical processes that are responsible for methane emissions to the atmosphere.Seven samples of mud breccia directly ejected from one crater were collected in the Dushanzi mud volcano,along with one argillite sample of the original reddish host rocks distal from the crater,for comparison purposes.The mineral and chemical compositions as well as iron species of all samples were determined using XRD,XRF and M?ssbauer spectroscopy,respectively.The results indicate that a series of marked reactions occurred in the mud volcano systems,more specifically in the mud breccia when compared to the original rocks.Changes mainly included: (1) some conversion of clay minerals from smectite into chlorite and illite,and the precipitation of secondary carbonate minerals such as calcite and siderite;(2) silicon depletion and significant elemental enrichment of iron,manganese,magnesium,calcium and phosphorus;and (3) transformation of iron from ferric species in hematite and smectite into ferrous species in siderite,chlorite and illite.These geochemical reactions likely induced the color changes of the original reddish Neogene argillite to the gray or black mud breccia,as a result of reduction of elements and/or alteration of minerals associated with the oxidation of hydrocarbons.Our results also suggest that greenhouse gases emitted from the mud volcanoes are lowered through a series of methane oxidation reactions and carbon fixation (i.e.,through carbonate precipitation). 展开更多
关键词 MUD VOLCANO MUD BRECCIAS iron species ORGANIC-INORGANIC interactions GREENHOUSE gas
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泥水盾构循环泥浆制备工艺技术——以甬台温天然气输气管道瓯江盾构工程为例 预览
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作者 王乐 刘小林 +2 位作者 郝立钊 李博 吉文龙 《石油天然气学报》 CAS 2018年第2期84-88,共5页
在泥水盾构施工中,泥浆作为输送渣土的介质,同时也是支护开挖面稳定的重要因素.因此,循环泥浆性能指标的好坏,决定了泥水盾构施工能否正常进行.瓯江盾构项目结合现场的实际情况和地层特点,针对大粒径卵石层掘进,主要从泥浆性能需求、配... 在泥水盾构施工中,泥浆作为输送渣土的介质,同时也是支护开挖面稳定的重要因素.因此,循环泥浆性能指标的好坏,决定了泥水盾构施工能否正常进行.瓯江盾构项目结合现场的实际情况和地层特点,针对大粒径卵石层掘进,主要从泥浆性能需求、配制设备改进、制备工艺优化等方面入手,不断摸索和创新.经施工技术人员的多次试验与实践,成功解决了大粒径卵石层掘进对泥浆质量和配制数量的要求,制定了掘进泥浆制备作业指导书,确保工程顺利穿越了300余米大粒径卵石层,日进尺达到7m. 展开更多
关键词 泥浆 泥水盾构 泥浆循环 大粒径卵石层 泥浆黏度
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Main technical innovations of Songke Well No.2 Drilling Project 预览
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作者 Yong-yi Zhu Wen-shi Wang +6 位作者 Xiao-ming Wu Heng-chun Zhang Jie Xu Jia Yan Long-long Cao Heng-qian Ran Jin-chang Zhang 《中国地质(英文)》 2018年第2期187-201,共15页
Songke Well No.2,one of the main part of the scientific drilling project in Songliao Basin,which was drilled 7018 m and acquired the part of cores continuously from the Low Cretaceous to the Carboniferous and the Perm... Songke Well No.2,one of the main part of the scientific drilling project in Songliao Basin,which was drilled 7018 m and acquired the part of cores continuously from the Low Cretaceous to the Carboniferous and the Permian from the 2843 m deep,can be considered as the deepest continental drilling project in Asia.Aiming at the features of longer well sections,larger diameters and multiple spud-ins for coring of Songke Well No.2,this project broke through the "coring in small diameter and reaming in large diameter"spud-in drilling-completion procedures which are always used in large-diameter-well coring for continental scientific drilling projects in domestic and overseas and the drilling method of short-singlecylinder roundtrip footage.At the same time,"coring in the same diameter and completing drilling at one single diameter"was achieved at all φ311 mm and φ216 mm coring sections of more than one thousand meters long,high-efficient operation with "drilling long footage with drill tools combined in multicylinders"was achieved at deep coring section.Four world drilling records were created which include more than a thousand meters continuous coring at φ311 mm,and the footage per roundtrip footage at φ311 mm,φ216 mm and φ152 mm is all more than 30 m,all of these breakthroughs reduced at least 300 days for this project;moreover,considering the characteristics of formations that the geothermal gradient is high in the drilled sections and the inside-well temperature is over 240℃ after drilling completion,a formate-polymer water-based mud system was developed by compounding attapulgite and sodium bentonite and by adding independently developed high-temperature stabilizer,which can provide critical technical support for successful well completion at 7018 m in the super-high-temperature environment It is the first time that the water-based mud is operated at the working temperature higher than 240℃ in China;Besides,considering the high-quality requirement on cores imposed by the project,the method "mechanical cor 展开更多
关键词 Songke WELL No.2 LONG DRILLING process Large DIAMETER Super-high-temperature WATER-BASED MUD Nondastruetive core diseharge
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浅谈常州大唐线路工程采用GF-250反循环钻机施工的改进方案 预览
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作者 王驰 陈根华 杜国顺 《电工技术》 2018年第22期132-134,共3页
根据常州大唐金坛燃机配套220kV送出工程金城镇区段地质条件,对采用GF-250履带式反循环钻机施工技术,在成孔方式、成孔时间、泥浆配置、灌注混凝土用量、施工功效、经济成本、施工便捷性等方面进行分析总结,提出了该地质条件下采用履带... 根据常州大唐金坛燃机配套220kV送出工程金城镇区段地质条件,对采用GF-250履带式反循环钻机施工技术,在成孔方式、成孔时间、泥浆配置、灌注混凝土用量、施工功效、经济成本、施工便捷性等方面进行分析总结,提出了该地质条件下采用履带式反循环钻机施工的改进方案。 展开更多
关键词 反循环 钻机 成孔 泥浆 功效
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