Positive cycle rotary digging entering-rock process
A technology of positive circulation and technology, which is applied in the field of positive circulation rotary excavation technology, can solve the problems of being unable to cope with complex working conditions and the construction quality cannot be guaranteed, and achieve the effects of improving the working environment of workers, good construction effect and saving water
Inactive Publication Date: 2017-07-07
BEIJING ZHONGYAN DADI TECH CO LTD
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Problems solved by technology
[0003] This research and development project overcomes the problem that traditional rotary excavation cannot cope with complex working conditions and the construction quality cannot be guaranteed
Method used
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Embodiment 1
[0030] The method of adopting a kind of positive circulation rotary drilling technology of the present invention, comprises the following steps:
[0031] Step 1) Level the site to achieve "three links and one leveling";
[0032] Step 2) pile foundation positioning, according to the pile foundation design plan, pile position lofting, measurement positioning;
[0033] Step 3) Before drilling, the casing should be accurately buried at the measured pile position, and the bottom of the casing should be ensured to sit on the strongly weathered rock formation. Accurately fix the drilling position, isolate the surface water, stabilize the hole soil and protect the hole wall from collapsing, so as to facilitate the drilling work;
[0034] Step 4) In order to ensure the quality of the hole, the drilling mud is prepared for the rotary drilling rig;
[0035] Step 5) Put the drilling rig in place, align the drill bit to the pile position, and adjust the verticality of the drilling rig af...
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A positive cycle rotary digging entering-rock process is mainly used for construction of a hard stratum. A steel wire rope, a sealing cover, a slurry inlet pipe, a connector, a connecting flange, a slurry conveying pipe, a sealing ring, a telescopic inner sleeve pipe, a rotary digging bucket, a tool bit, a bearing and a slurry circulation pump are involved. The problems that by means of a traditional rotary digging method, complex work conditions can not be handled, and the construction quality can not be guaranteed are solved through the positive cycle rotary digging entering-rock process. By means of the positive cycle rotary digging entering-rock process, construction is easy, and the manufacturing cost is reduced. According to the positive cycle rotary digging entering-rock process, slurry circular operation is achieved, a cooling effect on the tool bit is achieved, the rotary digging bucket is more resistant to abrasion, a better construction effect for cutting of the underground hard stratum is achieved, slurry is recycled, water is saved, and cost is greatly reduced. The bearing is involved, drilling is facilitated, the construction effect is better, design requirements are met, the construction quality is greatly improved, and positive significance is achieved for improvement on the construction environment of workers.
Description
technical field [0001] The invention relates to a positive circulation rotary digging technology, which is mainly used in the construction of bridge engineering, municipal engineering, water supply and drainage engineering, tunnel engineering and civil construction engineering. Since the traditional technology does not have a mud circulation system, the cutter head of the rotary excavation bucket cannot be cooled, and the construction quality cannot be guaranteed. To solve the above problems, a positive circulation rotary excavation rock entry process was developed. Background technique [0002] With the development of my country's engineering construction and social economy, the rotary excavation process plays an increasingly important role in foundation pit construction. This construction method is often used in building foundations, foundation pit engineering of industrial buildings and water conservancy construction projects, but traditional During the construction of the...
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IPC IPC(8): E21B3/00E21B21/00E02D5/34
CPCE21B3/00E02D5/34E21B21/00
Inventor 武思宇李建平李耀晖
Owner BEIJING ZHONGYAN DADI TECH CO LTD