旋挖鉆機(jī)的選型

Selection of rotary drilling rig

旋挖鉆機(jī)的選型

Selection of rotary drilling rig

旋挖鉆機(jī)依據(jù)其主要作業(yè)參數(shù)：扭矩、發(fā)動(dòng)機(jī)功率、鉆孔直徑、鉆孔深度及鉆機(jī)整機(jī)質(zhì)量的不同分為三種類型。小型機(jī)適用于鉆孔直徑0.5～1m，鉆孔深度40m左右的樁基。中型機(jī)適用于鉆孔直徑0.8～1.8m，鉆孔深度60m左右的樁基，大型機(jī)適用于鉆孔直徑1～3m，鉆孔深度105m的樁基。

Rotary drilling rig is divided into three types according to its main operating parameters: torque, engine power, borehole diameter, drilling depth and drilling machine quality. The minicomputer is suitable for pile foundations with diameters of 0.5 to 1m and 40m depth. The medium machine is suitable for pile foundations with borehole diameter of 0.8 ~ 1.8m and drilled depth of about 60m. The mainframe is suitable for pile foundations with drilling diameter of 1 ~ 3M and depth of drilling 105m.

旋挖鉆頭主要有短螺旋鉆頭、旋挖鉆斗、筒式鉆頭號(hào)。其中最常用的為短螺旋鉆頭、旋挖鉆斗。短螺旋鉆頭適合鉆進(jìn)松懈地層及軟硬地層以及鉆進(jìn)膠結(jié)較松的卵礫石層，特別是卵礫石較多較大的地層和風(fēng)化巖層；旋挖鉆斗適用于粘土層以及流沙層以及砂土、膠結(jié)較差粒徑較小的卵石層；筒式鉆頭適用于堅(jiān)固基巖或大漂石地層。

The rotary drill bit mainly consists of short spiral bit, rotary drilling bucket and drum bit. The most commonly used ones are short spiral bits and rotary drilling drills. A short spiral bit is suitable for drilling in slack strata and soft and hard strata, as well as loosely cemented gravel layers, especially large strata and weathered rock layers of gravel and gravel. The rotary drill pipe is suitable for clay layer, sand layer and sand, with smaller cemented gravel layer, and the barrel type bit is suitable for solid base rock or large rock drift rock. Stratum。