Drilling method and equipment for rotary drilling combined with pneumatic down-the-hole hammer
A technology of down-the-hole hammer and rotary drilling drill, which is applied in drilling equipment, drilling equipment and methods, drill bits, etc., can solve the problems of troublesome replacement, affect operation efficiency, and high configuration cost, achieve high speed, improve operation efficiency, reduce cost effect
Active Publication Date: 2016-05-18
化学工业第一勘察设计院有限公司
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Problems solved by technology
However, the rotary drilling rig and the pneumatic down-the-hole hammer belong to two sets of drilling rigs. The configuration cost is high, and the replacement is troublesome, which affects the efficiency of the operation.
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Embodiment Construction
[0021] The present invention will be described in further detail below, so that those skilled in the art can implement it with reference to the description.
[0022] According to the drilling method of rotary drilling combined with pneumatic down-the-hole hammer of the present invention, the method comprises the following steps:
[0023] Step 1, obtaining geotechnical engineering parameters through geotechnical engineering testing equipment;
[0024] Step 2, according to the obtained geotechnical engineering parameters and drilling requirements, the rotary drilling tools are configured to confirm the pile position;
[0025] Step 3, use the rotary drilling tool of the drilling rig to perform rotary drilling, and detect the rotary drilling resistance and / or output torque in real time;
[0026] Step 4, when the rotary drilling resistance is greater than the first preset value and smaller than the second preset value, start the pneumatic down-the-hole hammer drill, and the rotary...
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The invention discloses a rotary excavation combined pneumatic down-the-hole hammer drilling pore forming method and a device. The device mainly comprises a pneumatic down-the-hole hammer drill main body, a down-the-hole hammer drill bit and a sleeve, wherein the pneumatic down-the-hole hammer drill main body can drive the sleeve in a rotating manner; the down-the-hole hammer drill bit is controlled to ascend and descend through an impactor of the pneumatic down-the-hole hammer drill main body; and the down-the-hole hammer drill bit is arranged in the sleeve in a sliding manner, a clamp is arranged inside the sleeve, the wall of the sleeve is provided with at least one group of spiral rotary excavating drilling tool, and a plurality of drill cones are fixed on the edge of the rotary excavating drilling tool. According to the rotary excavation combined pneumatic down-the-hole hammer drilling pore forming method and the device, the advantages of a rotary excavating drilling machine and the advantages of a pneumatic down-the-hole hammer machine can be combined.
Description
technical field [0001] The invention relates to the field of rock and soil construction, in particular to a drilling method and equipment for rotary drilling combined with a pneumatic down-the-hole hammer. Background technique [0002] Rotary drilling rig is a kind of construction machine widely used in geotechnical construction for hole-forming operations at home and abroad. It has the characteristics of replacing manual labor, large installed power, large output torque, large axial pressure, flexible maneuverability, and high construction efficiency. With appropriate drilling tools, it can be used for hole-forming operations in strata such as fill, clay, silt, sand, and even sand and pebble layers. However, for relatively complete bedrock formations of medium and hard bedding without well-developed bedding fissures, there are great difficulties in using rotary drilling rigs for construction. In this case, it is common practice to use a rotary drilling rig in combination w...
Claims
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IPC IPC(8): E21B7/00E21B10/00
Inventor 张佩芳赵庆涛程书昌邓燕平
Owner 化学工业第一勘察设计院有限公司