Slag removing device used in long deep hole pile foundation construction
A slag extractor technology during construction, applied in infrastructure engineering, construction, earthmoving machines/shovels, etc., can solve the problems of poor scum removal effect, reduced hole forming speed, slow mud flow rate, etc. To achieve the effect of simple construction, reducing mechanical power and protecting the environment
Inactive Publication Date: 2012-05-30
CHINA RAILWAY 18TH BUREAU GRP CO LTD
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Problems solved by technology
In this method, because the hole is too deep and the specific gravity of the mud is large, the flow rate of the mud is very slow, and the effect of scum removal is very poor, which directly leads to a decrease in the hole forming speed.
Method used
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Embodiment Construction
[0017] As shown in the figure: a slag extractor used in the construction of long and deep hole pile foundations is composed of several steel pipes 1 connected by flange steel plates 2, and there are multiple ribs on both sides of the flange steel plates for fixing ribs Bolt holes 7. Weld the conical mouth 3 for collecting sediment at the bottom section of the connected steel pipe, and connect the high-pressure rubber hose 4 on the bottom section steel pipe. A sealing rubber plate 5 is installed between the flange steel plate connected to the steel pipe and a triangular rib plate 6 is installed between the flange steel plate and the steel pipe. One end of the triangular rib plate is fixed on the steel pipe, and the other end is passed through the flange steel plate. The bolt holes 7 on the top are fixed, and the distance can be adjusted at any time.
[0018] The working process of the present invention is: according to the depth of the hole, lower the connected slag extractor,...
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The invention discloses a slag removing device used in long deep hole pile foundation construction. The slag removing device is formed by connecting a plurality of steel pipes through flanges, the bottommost section of the connected steel pipes is welded with a tapered mouth for collecting sediments, and the bottommost section of steel pipe is connected with a high pressure rubber hose. The slag removing device disclosed by the invention has the following advantages and positive effects: (1) the mechanical power of slag removal is reduced; (2) the slag removing efficiency is improved on the premise of keeping a large mud weight; (3) the slag removing device is simple in structure and simple and convenient in construction; and (4) the slag removing device which has a wide range of application can be used for performing assistant slag removal in drill holes with difficult deep hole slag removal.
Description
Technical field: [0001] The invention relates to engineering construction equipment, in particular to a slag extractor used in the construction of long and deep hole pile foundations. Background technique: [0002] At present, in the design and construction of pile foundations of deep-water bridges, because the length of deep-water bored piles in the water is too long, the rock-socketed pile foundations are very deep, and the domestic drilling method is still the method of drilling holes with gravity impact hammers , The slag of the percussion drilling hole adopts the positive circulation scum method, that is, the rock particles are floated from the bottom of the hole to the mouth of the hole through the mud with a large specific gravity, and the scum is removed by filtering and settling. In this method, because the hole is too deep and the specific gravity of the mud is large, the flow velocity of the mud is very slow, and the effect of scum removal is very poor, which dire...
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IPC IPC(8): E02D27/12E02D27/52E02F5/20E02F7/10
Inventor 赵红专齐立斌杨利全黄欣
Owner CHINA RAILWAY 18TH BUREAU GRP CO LTD