旋挖鉆機中風化巖層施工工法--取巖芯

Construction method of weathered rock in rotary drilling rig -- core core

旋挖鉆機中風化巖層施工工法：

Construction method of weathered rock in rotary drilling rig:

中分解巖層施工工法：針對不同類型的中風化巖層，所選用的施工工藝及鉆具，鉆齒和導向齒的選配也具有較大的差異；旋挖鉆機鉆進中風化巖層有必定的難度，此刻套管工藝和泥漿護壁都顯得不那么重要，真實的問題在于怎么提升入巖功率！一起還要下降鉆具、鉆齒的損耗，以及及時檢測保護鉆桿，并防止偏孔。

The construction method of medium decomposed rock: in view of different types of medium weathered rock, the selection of construction technology and drilling tools, drilling gear and guide tooth selection also have great difference. The drilling rig has certain difficulty in drilling the weathered rock layer. At the moment, the casing process and the mud wall are not so important, the real problem is how How to increase the power to rock! We should also reduce the loss of drilling tools and drill teeth, and timely detect and protect drill pipes, and prevent deviating holes.

中風化巖施工安全防止措施

Safety prevention measures for the construction of medium weathered rock

1、取巖芯

1. Taking core

中風化強度較高，一般都選用筒鉆入巖取芯方法鉆進，相對于全斷面鉆斗，筒鉆入巖節(jié)約做工，可提升入巖能力，但一起也面對取巖芯幾率的問題！

The middle weathering intensity is high, and the core method is generally used to drill into the core method. Compared with the full section drill pipe, the cylinder drilling into the rock can save the workmanship and can improve the ability to enter the rock, but it also faces the problem of taking the core probability together.

防止措施：筒鉆取巖芯的幾率與巖石層理裂隙、單斗進尺深度及鉆具結構和鉆齒分布都有關聯(lián)。

Prevention measures: the probability of core drilling is related to rock bedding and crevice, depth of single bucket, drilling tool structure and drill tooth distribution.