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Sand screening and punching construction method of churn drill

A construction method and technology of percussion drilling, which are applied in earth-moving drilling, flushing wellbore, wellbore/well components, etc., can solve the problem that the thickness of sediment at the bottom of super-large diameter end-bearing piles easily exceeds the standard, the volume of mud drilling slag is large, and the The problems of too much equipment investment, etc., can improve the construction quality of pile foundation, reduce the investment of machinery and equipment, and speed up the cycle speed.

Inactive Publication Date: 2015-06-03
CCCC FOURTH HIGHWAY ENG
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Problems solved by technology

[0002] As a traditional hole-forming equipment for geological pile foundations in rock strata, impact drills are mainly suitable for pile foundation construction in small- and medium-diameter rock formations. They are used in super-large-diameter pile foundation holes. The volume of external transportation is large, the investment in equipment is large, and the thickness of the sediment at the bottom of the ultra-large-diameter end-bearing pile is easy to exceed the standard

Method used

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  • Sand screening and punching construction method of churn drill

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Embodiment Construction

[0015] The device used in the present invention is as figure 1 As shown, the specific implementation steps are as follows:

[0016] (1) A mud tube 2 for storing mud is arranged near the pile hole 1, a filter screen 3 is arranged above the mud tube 2, the filter screen 3 is fixed on a filter screen bracket 4, and one end of the filter screen 3 is high One end is set with a low slope, and the edge of the lower end of the filter screen 3 is located outside the edge of the mud cylinder 2; a vibrator 5 is arranged in the middle of the filter screen;

[0017] (2) Suspend a slurry pump 7 on the handlebar of the impact drill 6 by a chain block, suspend the slurry pump 7 in the pile hole 1, connect the slurry pump 7 to a slurry pipe 8, and place the slurry pump 7 The outlet of the slurry outlet pipe 8 is placed above the filter screen 3;

[0018] (3) a tripod 9 is set on one side of the mud tube 2, a slurry delivery pump 10 is suspended by a chain block on the support point of the tr...

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Abstract

The invention provides a sand screening and punching construction method of a churn drill. In a process of carrying out super-large-diameter pile hole punching construction by use of the churn drill, slag-contained slurry in a pile hole is pumped out by use of a slurry discharge pump, and is delivered into a filter sieve for filtration; the filtered slurry is temporarily stored in a slurry barrel; furthermore, the filtered slurry is returned into the pile hole by virtue of a slurry delivery pump, so that the slurry sedimentation time is saved, slurry losses are reduced, slurry boring mud output quantity is reduced, equipment investment is reduced and the construction progress is quickened.

Description

technical field [0001] The invention relates to the field of pile hole construction for road and bridge pile foundations, in particular to a method for super-large-diameter pile hole construction by using an impact drill. Background technique [0002] As a traditional hole-forming equipment for geological pile foundations in rock strata, impact drills are mainly suitable for pile foundation construction in small- and medium-diameter rock formations. They are used in super-large-diameter pile foundation holes. The volume of external transportation is large, the investment in equipment is large, and the thickness of the sediment at the bottom of the ultra-large-diameter end-bearing pile hole is easy to exceed the standard. However, under certain geological conditions, such as a suspension bridge across the river, the pile foundation of the main tower is close to the river, and the pile foundation of the main tower is a super-large-diameter pile foundation rock pile with a diam...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B21/01E21B21/06
CPCE21B21/01E21B21/065
Inventor 王志强孟祥源郝明向远航钱育强单晓东庞庆蔡悬程张新
Owner CCCC FOURTH HIGHWAY ENG
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