drilling hole diameter

Through theoretical analysis and experimental data,the effect of matching between piled anchor and drilling hole diameter on anchoring strength was described,and the most reasonable matching parameters of anchor diameter with drilling hole diameter were given.

通过理论分析和实验数据论述了锚杆与钻孔直径匹配对锚固强度的影响,并给出了锚杆直径与钻孔直径最合理的匹配参数。

According to Yangquan coal miningpractice, launches the application study that the great diameter perforate substituted with the trough to traverse into technology in opening, and popularizes and applies to gas drainage from adjacent layer.

针对阳泉煤业集团某矿实际,开展大直径钻孔替代顺槽横贯成孔工艺的应用研究,推广应用于邻近地层瓦斯抽放孔的施工工程中,为高瓦斯矿的瓦斯抽放寻找一种新的技术途径。

Drilling techniques of large diameter bend borehole which was the replacement of slant tunnel for gas discharge were researched in Yangquan.

在阳泉矿区进行了替代倾斜高抽巷的大直径拐弯钻孔施工工艺的研究,共完成6个试验孔,试验孔造斜段平均弯曲强度达到1·2°/m,钻孔总进尺378·55m。

Bit Design for Main Pier Bored Piles of Donghai Bridge

东海大桥主墩大直径钻孔灌注桩钻头设计

Research on the Bearing Performance of the Super-Long and Large-Diameter Bored Pile;

超长大直径钻孔灌注桩承载性能研究

EXPERIMENTAL RESEARCH ON NEGATIVE SKIN FRICTION OF LARGE-DIAMETER BORED PILES

大直径钻孔灌注桩负摩阻力试验研究

Gas drainage in seam with large auto variable diameter bore holes

自动变径大直径钻孔抽放煤层瓦斯试验

Construction Control in Bored Pile with Big Diameter of Anqing Yangtse River Bridge

安庆长江大桥大直径钻孔桩的施工控制

Construction Quality Control of Large-diameter Cast-in-place Bored Pile of Huanghe Bridge

黄河大桥大直径钻孔灌注桩施工的质量控制

Design and Construction of large Diameter Drilling Hollow Pile without Pile Caps

无承台大直径钻孔空心桩的设计与施工

The Theoretic Research of Feasibility of Big Track Boring Used in Coal and Gas Burst Predication;

大直径钻孔预测与瓦斯突出可行性的理论研究

Nonlinear Analysis of Pile Group Effect of Large Diameter Cast-in-situ Piles;

大直径钻孔灌注桩群桩效应非线性分析

Study of computational method for ultimate shaft resistance of large-diameter bored cast-in-situ pile

大直径钻孔灌注桩极限侧阻力计算方法研究

Discuss the Large Diameter Drill Hole Filling Pile Should Pay Attention Question in Construction

浅谈大直径钻孔灌注桩在施工中应注意的问题

Test and Analysis of Bearing Capacity of Overlong Major Diameter Bored Pile

超长大直径钻孔灌注桩的承载力检测与分析

Key Construction Technique for Super-long and Large-diameter Bored Pile

深水超长大直径钻孔灌注桩施工关键技术研究

Application of Advanced PHP Slurry to the Construction of Long and Large Diameter Bored Piles in Deepwater and Complex Land

高级PHP泥浆在深水大直径钻孔桩施工中的应用

Technology of 1000 meter directional borehole at large diameter for mine gas extraction

顶板大直径千米长钻孔抽采瓦斯技术

Construction Technology of Large Diameter Rotary Drilled and Bored Piles in Qingdao Gulf Bridge

青岛海湾大桥大直径旋挖钻孔灌注桩施工技术

Study on the Vertical Bearing Capacity of Large-Diameter Bored Cast-in-Situ Long Pile;

大直径深长钻孔灌注桩单桩竖向承载性能研究

The practice and application of kilometer-orientated large diameter and long-distance drilling

千米定向大直径长距离钻孔的实践与应用